Danfoss OSPE User guide

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Technical Information

Steering

OSPE Steering Valve

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Technical Information

OSPE Steering Valve

Revision history Table of revisions

Date Changed Rev

February 2022 Updated Order Specifications and Code Numbers to match Design Center Configurator 0701

July 2020 Updated revision number to match with online catalog 0606

November 2016 Minor updates 0503

Changed document number from 'BC00000066' to 'BC152886485467' 0504

July 2016 Corrected drawing of OSPEC LSRM with PVED-CLS in a system with variable pump, GPS

receiver, joystick and mini wheel

February 2016 Updated with PVED-CLS content; removed SASA information 0501

May 2015 Dimension drawing updated DB

July 2014 Changed to Danfoss layout DA

July 2011 Flow characteristics added CA

October 2009 Major change BA

August 2009 First edition AA

0502

2 | © Danfoss | February 2022 BC152886485467en-000701

Technical Information

OSPE Steering Valve

A wide range of steering components

Conversion factors........................................................................................................................................................................... 5

Survey of literature on Danfoss steering components.......................................................................................................5

General Information

General steering valve type OSPE.............................................................................................................................................. 6

Versions

Overview..............................................................................................................................................................................................7

OSPEC LS/LSRM with PVED-CLS..................................................................................................................................................8

OSPEF LS with PVED-CLS............................................................................................................................................................... 9

OSPEDC LSRM with PVES............................................................................................................................................................ 10

OSPEDF LS with PVES................................................................................................................................................................... 11

PVED-CL/CLS Function

OSPE steering valve.......................................................................................................................................................................13

OSPEC LSRM with PVED-CLS......................................................................................................................................................14

Neutral position.........................................................................................................................................................................14

Steering right with steering wheel.....................................................................................................................................16

Steering right with EH.............................................................................................................................................................18

PVES and PVED-CLS, electrical actuation.............................................................................................................................. 19

Closed loop control.......................................................................................................................................................................20

Principle.............................................................................................................................................................................................20

Inductive transducer, LVDT........................................................................................................................................................ 20

Integrated pulse width modulation........................................................................................................................................20

Technical Data

OSPE....................................................................................................................................................................................................21

Weights..............................................................................................................................................................................................22

PVES.................................................................................................................................................................................................... 22

PVED-CLS...........................................................................................................................................................................................23

Hysteresis, PVES and PVED-CLS................................................................................................................................................ 23

Coil of control valve for mode select...................................................................................................................................... 24

Dimensioning

Dimensioning steering system with OSPE steering valve...............................................................................................27

Technical Characteristics

EH-directional spools of OSPE...................................................................................................................................................28

Pilot pressure relief valve: (P - T, Qp) characteristic...........................................................................................................28

Pressure drop P-EF for Danfoss OSPE valve..........................................................................................................................29

Dimensions

OSPE dimensions with PVED-CLS.............................................................................................................................................30

OSPE dimensions with PVED-CC/CL........................................................................................................................................31

Hydraulic systems System Safety

Emergency steering...................................................................................................................................................................... 35

OSPE and system safety PVES ...................................................................................................................................................35

Safety considerations................................................................................................................................................................... 36

Order Specification

Variants and order specification...............................................................................................................................................37

OSPE master model code (MMC) breakdown......................................................................................................................38

Danfoss | February 2022 BC152886485467en-000701 | 3

Technical Information

OSPE Steering Valve

A wide range of steering components

Danfoss is one of the largest producers in the world of steering components for hydrostatic steering systems on off-road vehicles. Danfoss offers steering solutions both at component and system levels. Our product range makes it possible to cover applications of all types, ranging from ordinary 2 wheel steering (also known as Ackermann steering) to articulated steering, automatic steering (for example, by sensor) and remote controlled steering via satellite. We can offer more than 1,800 different steering units and 250 different priority valves categorized in types, variants and sizes.

Danfoss offers:

For hydrostatic steering systems:

Product type Displacement Rated Flow Steering Pressure Mini steering units

Steering units

Priority valves

Pilot operated flowamplifiers (factors: 4, 5, 8, or 10)

Pilot operated steering valves

32 – 100 cm3/rev [1.95 –6.10 in3/rev]

40 – 1200 cm3/rev [2.44 to 73.2 in3/rev]

–

– 240 and 400 l/min [63.4 and

–

max. 20 l/min [5.28 US gal/min]

max. 100 l/min [26.4 US gal/min]

40, 80, 120, 160, 320 l/min [10.6, 21.1, 31.7, 42.3, 84.5 US gal/min]

105.7 US gal/min]

max. 100 l/min [26.4 US gal/min]

max. 140 bar [2030 psi]

max. 240 bar [3481 psi]

max. 350 bar [5076 psi]

max. 240 bar [3480 psi]

max. 250 bar [3625 psi]

For electrohydraulic steering systems

Product type Displacement Rated flow Steering pressure Pilot operated steering

valves Integrated electrically

operated steering valve Electrically operated

steering valve

- 100 l/min [26.4 US gal/min] 250 bar [3625 psi]

100 - 500 cm3/rev [6.10 - 30.51 in3]

- 70 l/min [18.5 US gal/min] 250 bar [3045 psi]

50 l/min [13.2 US gal/min] 210 bar [3045 psi]

4 | © Danfoss | February 2022 BC152886485467en-000701

Technical Information

OSPE Steering Valve

A wide range of steering components

Characteristic features for steering units:

Low steering torque: from 0.5 to 3 N•m in normal steering situations

•

Low noise level

•

Low pressure drop

•

Many types available: Open center Non-reaction, Open center Reaction, Power Beyond, Closed center

•

Non-reaction, Load Sensing, Load Sensing Reaction One or more built-in valve functions: relief valve, shock valves, suction valves, non-return valve in P-

•

line and LS-line Optional port connections according to ISO, SAE or DIN standards

•

Characteristics for EH steering systems with OSPE, EHPS, and EHi:

Possibility of GPS, row sensor, variable steering ratio and joystick steering

•

Possibility of manual steering even on very heavy vehicles

•

EHPS:

•

High steering pressure requiring smaller cylinders and flow

‒

Low pilot pressure and flow giving extremely low noise in the cabin

‒

Combined with Danfoss PVG 32 proportional valve

‒

Conversion factors

1 N•m = [8.851 lbf•in] 1 l = [0.264 US gal] 1 N = [0.2248 lbf] 1 bar = [14.5 psi] 1 mm = [0.0394 in] °F = [1.8°C + 32] 1 cm3 = [0.061 in3]

Survey of literature on Danfoss steering components

Detailed data on all Danfoss steering components and accessories can be found in our steering component catalogs, which is divided in to the following individual sub catalogs:

General information Steering components

Technical data on open center, and closed center steering units OSPB, OSPC, and OSPD Technical data on load sensing steering units, priority valves and flow

amplifiers Technical data on priority valves OLS Technical data on priority flow amplifiers OSQ Technical data on valve blocks OVPL and OVR Technical data on load sensing steering units with amplification OSPU Technical data on steering units with zero dead band OSPS Technical data on steering units with integrated priority valve VSPP Technical data on hydraulic and EH pilot operated steering valves,

electrical actuation modules and appropriate steering units. Technical data on combined steering unit/EH steering valves and steering

wheel sensors Technical data on electrohydraulic steering valves EHi Technical data on steering wheel sensors SASA

OSPB, OSPC, OSPF, OSPD, OSPDF, OSPL, OSPBX, and OSPLX

EHPS, EHPS w. OLS 320, PVE for EHPS and OSPCX

OSPE

For technical information on individual variants, please contact the Danfoss Sales Organization.

Danfoss | February 2022 BC152886485467en-000701 | 5

Technical Information

OSPE Steering Valve

General Information

General steering valve type OSPE

On tractors, combine harvesters, maize harvesters and other simulate vehicles there is often a need for electrically actuated steering to make automatic GPS controlled steering possible. Also manual steering with variable ratio is an often wanted feature to improve productivity and driver comfort.

For this purpose Danfoss has developed a combined steering unit and electrohydraulic steering valve named OSPE: OSP for normal manual steering wheel activated steering and E for electrohydraulic steering activated by electrical input signal either from GPS or vehicle controller or from steering wheel sensor (Danfoss type SASA) for variable steering ratio. In variable steering mode, the electrohydraulic valve part adds flow to the metered out flow from the steering unit part of the OSPE.

OSPE has build in safety function in form of cut off valve, which makes unintended steering from Electro hydraulic valve part impossible. The OSPE is the right steering element first of all to build up steering system with very high safety level and so to be able to fulfill legislation demands such as those in EU Machinery Directive 2006/42/EC.

OSPE is offered with the PVED-CLS steering valve controller. PVED-CLS offers integrated, flexible software-based electrohydraulic steering functionality which can be tailored to any off-road vehicle type by software parameterization. The PVED-CLS also works as a certified Safety Controller. For further details about PVED-CLS, see OSPE with PVED-CLS Steering Valve Controller Data Sheet, AI152986484866.

In cases where space do not allow room enough for OSPE, an ordinary OSP non-reaction steering unit combined the EH-Electrohydraulic In-Line steering valve is an alternative. EH valves are offered with the same safety functions as OSPE. Please contact Danfoss sales organization.

6 | © Danfoss | February 2022 BC152886485467en-000701

Technical Information

OSPE Steering Valve

Versions

Overview

Steering valve OSPE and electrical actuation module PVE

Steering unit part

Version

OSPEC xxx LS/LSRM “C”-dynamic load sensing, non-reaction or reaction (RM) Single OSPEF xxx LS/LSRM “F”-dynamic load sensing, non-reaction or reaction (RM) Single OSPEDC xx/yyy LS/LSRM “C”-dynamic load sensing, non-reaction or reaction (RM) Dual OSPEDF xx/yyy LS/LSRM “F”-dynamic load sensing, non-reaction or reaction (RM) Dual

x denotes first gear set, y denotes secondary gear set in OSPED (dual displacement) configurations.

EH-part of OSPE in combination with any OSPE

Spool type Static load sensing PVE actuator

The EH static load sense and OSP dynamic load sense signals are internally resolved by a PVFC spool.

Priority valve in OSPE in combination with any OSPE

Dynamic If priority valve is present elsewhere in system, OSPE can be without priority valve.

Spool/sleeve type Gear set

PVES, PVED-CC, PVED-CLS

Danfoss | February 2022 BC152886485467en-000701 | 7

P301 168

PVED-CLS

Electronics

P T L

OSP

Technical Information

OSPE Steering Valve

Versions

OSPEC LS/LSRM with PVED-CLS

This version is preferred for front wheel steered vehicles, like tractors, where self-alignment steering effect is desired. Reaction type steering resembles a car where the direction of travel will continue straight ahead when ever the steering wheel is not touched. The reaction concept in any OSPE steering units is based on Danfoss RM technology. The reaction effort is selectable by help of the solenoid valve for activating EH steering:

•

Road mode: When EH steering is powered off, then OSPE behaves the same as a Reaction unit Field mode: When EH steering is powered on, then OSPE behaves the same as a Non-reaction unit

8 | © Danfoss | February 2022 BC152886485467en-000701

P301 170

PVED-CLS

Electronics

P T L

OSP

Technical Information

OSPE Steering Valve

Versions

OSPEF LS with PVED-CLS

This version is preferred for rear wheel steered vehicles, like combines. In both modes:

Road mode: When EH steering is unpowered

•

Field mode: When EH steering is powered

•

The steering unit part behaves as a Non-reaction steering unit. The “F”-spool type is preferred for steering systems where high level of negative steering forces may be present e.g. articulated steered vehicles.

Danfoss | February 2022 BC152886485467en-000701 | 9

T L R

PVES

Electronics

OSP

P301 171

Technical Information

OSPE Steering Valve

Versions

OSPEDC LSRM with PVES

This version is preferred for front wheel steered vehicles, like tractors, where self-alignment steering effect is desired. Only difference compared to OSPEC LSRM is that “D” type has 2 gear wheel sets (rotary meters). Should the pump supply be lost, only one gear set is active for emergency steering. In normal steering situations both gear sets are active.

10 | © Danfoss | February 2022 BC152886485467en-000701

T L R

PVES

Electronics

OSP

P301 172

Technical Information

OSPE Steering Valve

Versions

OSPEDF LS with PVES

This version is preferred for rear wheel steered and articulated vehicles. Only difference compared to OSPEF LS is that “D” type has 2 gear wheel sets (rotary meters). This version however is shown without priority valve.

Danfoss | February 2022 BC152886485467en-000701 | 11

Technical Information

OSPE Steering Valve

PVED-CL/CLS

Only promote PVED-CLS for new applications. PVED-CL is only used in existing codes established until start of 2015. For details about PVED-CLS, see OSPE with PVED-CLS Steering Valve Controller Data Sheet, AI152986484866.

OSPE with an electrical programmable module (PVED-CLS) the following steering features in electro hydraulic steer mode/field mode are possible:

GPS-steering

•

Row sensor/ camera steering

•

Joy stick or mini st. wheel steering

•

Variable steering ratio

•

Speed depending steering ratio

•

12 | © Danfoss | February 2022 BC152886485467en-000701

14, 15, 17

9, 10, 11

P301 216

Technical Information

OSPE Steering Valve

Function

OSPE steering valve

The OSPE steering valve includes the following main components

1 2 3 5 7 8 9 10 11

Shock valves Suction valves Spool/sleeve set Gear set Mode select and EH cut off valve EH directional valve PVE control unit LVDT transducer Solenoid valve bridge

12 13 14 15 16 17 18 21 22

Control valve for mode select Pilot reduction valve, 12 bar PP damping orifice Priority valve spool Priority valve spring Dynamic orifice Pilot pressure relief valve PVFC valve/LS resolver Neutral spring package for spool/sleeve

Danfoss | February 2022 BC152886485467en-000701 | 13

P301 173

PVED-CLS

Electronics

P T L

OSP

12 13

14 15 16 17 18

Technical Information

OSPE Steering Valve

Function

OSPEC LSRM with PVED-CLS

Neutral position

14 | © Danfoss | February 2022 BC152886485467en-000701

1 Shock valves 12 Control valve for mode select 2 Suction valves 13 Pilot reduction valve, 12 bar 3 Spool/sleeve set 14 PP damping orifice

Technical Information

OSPE Steering Valve

Function

4 Emergency steering check valve 15 Priority valve spool 5 Gear set 16 Priority valve spring 6 P-check valve 17 Dynamic orifice 7 Mode select and EH cut off valve 18 Pilot pressure relief valve 8 EH directional valve 19 LS orifice 9 PVE control unit 20 LS check valve 10 LVDT transducer with dual signal 21 PVFC valve/LS resolver 11 Solenoid valve bridge 22 Neutral spring package for spool/sleeve

When the engine is turned off, the priority valve spool (15) is pushed to the left by the spring (16). The passage to the EF port is blocked and the passage to CF to the OSP spool/sleeve set (3) and to the EH

directional valve spool (8) is open. When the engine is on and the steering unit OSP and EH is in neutral position, the CF pressure will rise to

match the spring force in the priority valve, and the priority valve spool (15) will move to the right and the oil will pass from the pump across the integrated priority valve spool (15) and out through the EF port.

The priority valve is a “dynamic” type, meaning that a flow passes from CF through the Dynamic orifice (17) (integrated in spool 15) and into the LS line through the LS orifice (19), LS check valve (20), the PVFC valve (21) and into the spool/sleeve set (3). In neutral position this dynamic oil flow passes on to the tank.

When the steering unit is in neutral position and control valve (12) is deactivated, then the mode select/EH cut off valve (7) makes connection through the Reaction circuit, Lr and Rr. So if the steering wheel is untouched and a delta P is generated in the steering cylinder, oil will pass from L to R or R to L through the spool/sleeve set (3) and gear set (5) and the steering wheel will rotate until it is grabbed or delta P disappears. Only the force of the neutral spring package (22) has to be overcome to stop the rotation of the steering wheel and therefore stop the cylinder movement. The mode select/EH cut off valve (7) makes unintended EH steering impossible, if e.g. a false input signal comes to the PVE control unit (9), when the control valve (12) is deactivated, because L and R connections from EH directional valve spool (8) are blocked in (7).

If the control valve (12) is activated, then the mode select/EH cut off valve (7) blocks connection through the Reaction circuit. In this position there will be no reaction behavior even if there is build up delta P on the steering cylinder from forces on the steered wheels. So the steering unit behaves as a Non reaction OSP. In that situation (If the control valve (12) is activated) EH steering is possible.

Danfoss | February 2022 BC152886485467en-000701 | 15

P301 174

PVED-CLS

Electronics

P T L

OSP

12 13

14 15 16 17 18

Technical Information

OSPE Steering Valve

Function

Steering right with steering wheel

16 | © Danfoss | February 2022 BC152886485467en-000701

1 Shock valves 12 Control valve for mode select 2 Suction valves 13 Pilot reduction valve, 12 bar 3 Spool/sleeve set 14 PP damping orifice 4 Emergency steering check valve 15 Priority valve spool

Technical Information

OSPE Steering Valve

Function

5 Gear set 16 Priority valve spring 6 P-check valve 17 Dynamic orifice 7 Mode select and EH cut off valve 18 Pilot pressure relief valve 8 EH directional valve 19 LS orifice 9 PVE control unit 20 LS check valve 10 LVDT transducer with dual signal 21 PVFC valve/LS resolver 11 Solenoid valve bridge 22 Neutral spring package for spool/sleeve

When steering with the steering wheel to the right, the spool of the spool/sleeve set (3) will rotate relative to the sleeve. So LS line will be connected to R-side. LS pressure will raise accordingly to steering pressure required and priority valve spool (15) will be pressed to the left and oil will stream through the internal CF side of the priority valve and on to the spool/sleeve set (3) through the gear set (5) and out through the R connection. In parallel the L side is opened through the spool/sleeve set (3) to tank (T). When steering up against cylinder end stop, pressure will raise in LS line according to setting of pilot pressure control valve (18). Check valve (20) avoids oil to stream backwards from servo side (R in this case) and over valve (18) to tank. So the valve (18) shall only open for the dynamic flow generated in the dynamic orifice (17) of priority valve part, independent if steering is done by the steering wheel (OSP part) or by the EH valve.

Danfoss | February 2022 BC152886485467en-000701 | 17

P301 175

PVED-CLS

Electronics

P T L

OSP

12 13

14 15 16 17 18

Technical Information

OSPE Steering Valve

Function

Steering right with EH

18 | © Danfoss | February 2022 BC152886485467en-000701

1 Shock valves 12 Control valve for mode select 2 Suction valves 13 Pilot reduction valve, 12 bar 3 Spool/sleeve set 14 PP damping orifice 4 Emergency steering check valve 15 Priority valve spool

Technical Information

OSPE Steering Valve

Function

Before it is possible to steer with the EH part of the OSPE, it is needed to power the control valve for mode select (12) for field mode. When this valve is powered, the pilot supply (12 bar) is lead from the pilot reduction valve (13) through the control valve (12) to the EH cut off valve (7). So the valve (7) makes connection from EH directional valve (8) to the cylinder ports, L and R, and (7) also leads pilot supply to the solenoid valve bridge (11) of the PVED CLS control unit (9) In the same shift, the valve (7) interrupts the reaction circuit, Lr and Rr, from the spool/sleeve set (3) to the cylinder ports, and the unit acts as a non-reaction OSP in this mode.

When an input signal is transmitted to the electrical connector of the PVE (9), in this example signal to steer to the right, the solenoid valve bridge (11) is activated and the EH directional valve spool (8) is moved to the right. So LS in the spool (8) will sense the needed steering pressure, and this is transmitted to the PVFC valve /LS resolver (21). So the valve (21) makes restrictions in the dynamic LS flow from dynamic orifice (17) of priority valve, and the LS pressure in the priority valve spool (15) will match the LS pressure required from the EH directional valve spool (8). Accordingly the position of the priority valve spool (15) will change to match the flow and pressure demand for EH-steering.

In case the “watch dog” part of the PVED CLS registers an unintended steering movement e.g. due to a false input signal to the PVE, the electrical power to the control valve for mode select (12) will be switched off.

So valve 12 will dump pilot pressure to tank, mode select and EH cut off valve (7) will change position so that connection from EH directional valve spool (8) to cylinder ports will be blocked. Furthermore it will not be possible to activate the solenoid valve bridge (11) and the PVE will go into/stay in neutral position. In this way a true safe state is established.

The non-reaction circuit from the OSP part is always connected to L and R cylinder ports independent of position of mode select valve (7), and so OSP steering is always possible.

PVES and PVED-CLS, electrical actuation

The philosophy of Danfoss electrohydraulic actuation, type PVE, is integration of electronics, sensors and actuators into a single unit that interfaces directly to the OSPE steering valve body.

Danfoss | February 2022 BC152886485467en-000701 | 19

Technical Information

OSPE Steering Valve

Function

Closed loop control

All the proportional actuators feature an integrated feedback transducer that measures spool movement in relation to the input signal, and by means of a solenoid valve bridge, controls the direction, velocity and position of the main spool of the valve. The integrated electronics compensate for flow forces on the spool, internal leakage, changes in oil viscosity, pilot pressure, etc. This results in lower hysteresis and better resolution. Furthermore the electronics enable built in safety like fault monitoring, directional indication and LED light indication.

Closed loop control schematic

Principle

In principle the input signal (set-point signal) determines the level of pilot pressure which moves the main spool. The position of the directional spool is sensed in the LVDT transducer which generates an electric feed-back signal registred by the electronics. The variation between the set-point signal and feedback signal actuates the solenoid valves. The solenoid valves are actuated so that hydraulic pilot pressure drives the directional spool into the correct position.

Inductive transducer, LVDT

(Linear Variable Differential Transformer). When the directional spool is moved, a voltage is induced proportional to the spool position. The use of LVDT gives contact-free monitoring of the directional spool position. This means an extra-long working life and no limitation as regards the type of hydraulic fluid used. In addition, LVDT gives precise position signal of high resolution.

Integrated pulse width modulation

Positioning of the directional spool in PVES is based on the pulse width modulation principle. As soon as the directional spool reaches the required position, modulation stops and the spool is locked in position.

20 | © Danfoss | February 2022 BC152886485467en-000701

Technical Information

OSPE Steering Valve

Technical Data

OSPE

The technical data for OSPE are typical measured results. For the hydraulic system a mineral based hydraulic oil with a viscosity of 21 mm2/s [102 SUS] and a temperature of 50°C [122°F] was used.

Gear set Single, range 100-500 cm3/rev [6.1-30.5 in3/rev]

Dual, range 60/120 – 125/440

Max. pressure Port P, EF 250 bar [3625 psi]

Port LS 210 bar [3045 psi] Port L, R 280 bar [4060 psi] Port T 25 bar [362 psi]

Oil flow rated Port P, EF 90 l/min [23.8 US gal/min]

Port L/R, steering wheel steering 50 l/min [12.2 US gal/min] Port L/R, EH steering 12, 20, 30, 40 or 50

Spool travel, EH directional spool ± 4 mm [± 0.16 in] Dead band, EH-directional spool, nominal ± 0.8 mm [± 0.03 in] Priority valve Type Dynamic

Spring force 7 bar, 10 bar optional [100 psi, 145 psi

Nominal flow 90 l/min [23.8 US gal/min]

Oil temperature Recommended temperature 30 --> +60°C [86 --> +140°F]

Min. temperature -30°C [-22°F]

Max. temperature +90°C [190°F] Ambient temperature -30 → +60°C [-22 → +140°F] Oil viscosity Operating range 12-80 mm2/sec [66.0-370.3 SUS]

Min. viscosity 10 mm2/sec [58.9 SUS]

Max. viscosity 460 mm2/sec [2134 SUS] Filtration Max contamination (ISO 4406) 21/19/16 Temperature difference between steering unit

and other hydraulics

Max. 10°C [50°F]

cm3/rev

l/min

[3.7/7.3 – 7.6/26.8 in3/ rev]

[3.2, 5.3, 7.9, 10.6 or

13.2 US gal/min]

optional]

Danfoss | February 2022 BC152886485467en-000701 | 21

Technical Information

OSPE Steering Valve

Technical Data

Weights

Weight of OSPE

Type Weight

kg [lb]

OSPE 100 12.7 [28.0] OSPE 125 12.8 [28.2] OSPE 140 12.9 [28.4] OSPE 160 13.0 [28.7] OSPE 185 13.1 [28.9] OSPE 200 13.2 [29.1] OSPE 230 13.5 [29.8] OSPE 250 13.4 [29.5] OSPE 315 13.7 [30.2] OSPE 400 14.1 [31.1] OSPE 430 14.2 [31.3] OSPE 500 14.5 [32.0]

PVES

Weight of OSPED

Type Weight

kg [lb]

OSPED 60/120 14.6 [32.2] OSPED 60/185 14.9 [32.9] OSPED 60/220 15.2 [33.5] OSPED 70/170 14.8 [32.6] OSPED 70/320 15.5 [34.2] OSPED 80/240 15.1 [33.1] OSPED 80/395 15.8 [34.8] OSPED 100/260 15.2 [33.5] OSPED 100/300 15.4 [34.0] OSPED 125/285 15.3 [33.7] OSPED 125/440 16.0 [35.3]

PVES

rated 11 V to 32 V

Supply voltage U

Current consumption at rated voltage PVES 0.57 A @ 12 V 0.3 A @ 24 V Signal voltage neutral 0.5 x U

Signal current at rated voltage 0.25 mA to 0.70 mA

range 11 V to 32 V max. ripple 5%

CR-port ↔ CL-port

0.25 • UDC to 0.75 • U

22 | © Danfoss | February 2022 BC152886485467en-000701

157-669.11

Technical Information

OSPE Steering Valve

Technical Data

PVES

Input impedance in relation to 0.5 • U Input capacitor 100 ηF Power consumption PVES 7 W

Supply voltage Function PVES

Disconnected by means of neutral switch

Constant voltage Reaction time from neutral position to max.

Constant voltage Reaction time from max. spool travel to neutral

Reaction time from neutral position to max. spool travel

Reaction time from max. spool travel to neutral position

spool travel

position

12 KΩ

Prop. super s

max. 0.230 rated 0.150 min. 0.120 max. 0.175 rated 0.090 min. 0.065 max. 0.200 rated 0.120 min. 0.050 max. 0.100 rated 0.090 min. 0.065

PVED-CLS

For details about PVED-CLS, see OSPE with PVED-CLS Steering Valve Controller Data Sheet, AI152986484866.

Hysteresis, PVES and PVED-CLS

-> neutral.

Spool travel

Hysteresis, PVES and PVED-CLS

rated ∼ 0%

Hysteresis is indicated at rated voltage and f = 0.02 Hz for one cycle (one cycle = neutral -> full CL -> full CR

Danfoss | February 2022 BC152886485467en-000701 | 23

Technical Information

OSPE Steering Valve

Technical Data

PVES

Oil consumption

Supply voltage Function PVES

Without voltage Pilot oil flow neutral 0.3 l/min [0.078 US gal/min] With voltage Pilot oil flow locked 0.1 l/min [0.026 US gal/min]

continuous actuations

0.8 l/min [0.211 US gal/min]

Oil viscosity

Oil viscosity range 12 - 75 mm2/s [65 - 347 SUS]

min. max. 460 mm2/s [2128 SUS]

4 mm2/s

[39 SUS]

Note: Max. start up viscosity 2500 mm2/s

Oil temperature

Oil-temperature Rec. range 30 → 60˚C [86 -140˚F]

min. -30˚C [-22˚F] max. 90˚C [194˚F]

Filtering

Filtering in the hydraulic system Max. allowed degree of contamination (ISO 4406, 1999 version):

Ambient temperature

Ambient temperature range Rec. -30° → +60°C [-22° → +140°F]

Pilot pressure

Pilot pressure (relative to T pressure) nom. 13.5 bar [196 psi]

Enclosure and connector version

Version of connector AMP JPT connector DEUTSCH connector

Grade of enclosure

According to the international standard IEC 529

In particularly exposed applications, protection in the form of screening is recommended.

Coil of control valve for mode select

Below technical data are valid for coil of control valve for mode select, when this coil is connected directly to the wiring of the application.

For OSPE with PVED-CLS the coil will be connected to the PVED-CLS. For more information, see OSPE with PVED-CLS Steering Valve Controller Data Sheet, AI152986484866.

23/19/16

min. 10 bar [145 psi] max. 15 bar [217 psi]

IP 66 IP 67

24 | © Danfoss | February 2022 BC152886485467en-000701

-20°

-10°

0°

10°

20°

30°

40°

50°

60°

70°

80°

90°

100°

70% 80% 90% 100% 110% 120% 130% 140%

kwa1382113466970

56.6

[2.23]

P102 541

Technical Information

OSPE Steering Valve

Technical Data

Specifications

•

Duty cycle rating: 100%

•

Magnet wire insulation: Class H (180C)

•

Ambient temperature: -30 to 60 °C [-22 to 140 °F]

•

Diodes are available; contact your Danfoss representative.

•

Environmental protection: IP65

•

All AC coils are internally rectified

Electrical specifications

16 watt coils

Danfoss | February 2022 BC152886485467en-000701 | 25

Voltage (V) Resistance (Ohms) ±5% @ 20 °C [72 °F] Current draw (A) at 25 °C [77 °F] Color

12 V

24 V

Terminals

9 36 0.67 Black

1.33 Gray

Amp Junior Timer Code AJ

60.7

[2.39]

45.2

[1.78]

kwa1382113478636

Technical Information

OSPE Steering Valve

Technical Data

Part number

Voltage (V) Power (W) Part number

12 V

16 D08-16-12D-AJ

DEUTSCH Code DE

Part number

Voltage (V) Power (W) Part number

12 V 24

16 D08-16-12D-DE 16 D08-16-24D-DE

26 | © Danfoss | February 2022 BC152886485467en-000701

Technical Information

OSPE Steering Valve

Dimensioning

Dimensioning steering system with OSPE steering valve

The cylinder flow is determined from steering cylinder volume, number of revolutions on steering wheel from lock to lock and steering speed. Dimension of steering cylinder(s) can be based on formulas in “General, steering components” page 29-31.

Symbols:

V (l) steering cylinder volume i (rev) number of steering wheel revolutions from lock to lock Vvc (cm3/rev.) steering system displacement for steering cylinder CQ (l/min) nominal cylinder flow Pems (bar) emergency steering pressure Tems (Nm) emergency steering torque Fe (N) emergency steering wheel rim force Swd (m) steering wheel diameter Vvs (cm3/rev) displacement, steering unit PQ (l/min) pilot flow Qpm (l/min) pump flow, minimum

Example:

Cylinder volume: V = 1.85 l [0.49 US gal] Required number of steering wheel revolutions from lock to lock:

i = 4 – 5 revolutions

The required steering system displacement for steering cylinder is calculated from

Vvc = V/i = (1.85*1000)/5 = 370 cm3/rev [22.58 in3/rev] (1.85*1000)/4 = 463 cm3/rev [28.25 in3/rev]

In this example we chose Vvc = 400 cm3/rev [24.4 in3/rev] The nominal cylinder flow at 100 rpm speed on steering wheel.

CQ = 400 * 100/1000 (cm3/l) = 40 l/min [10.57 US gal/min]

In this case we try to use an “D” type steering unit to avoid emergency steering pump. The “small” gear set, which is the only hydraulically active gear set in emergency steering mode is

determined by the demand for emergency steering pressure. Emergency steering pressure, Pems, is calculated to be maximum Pems = 40 bar [580 psi] Maximum allowable steering torque Tems based on steering wheel rim force Fe=350 N and steering

wheel diameter Swd = 0.381 m

Tems = Fe * Swd/2 = 350 * 0.381/2 = 66.7 Nm [580 lbf•in]

Emergency steering unit displacement can be chosen/calculated from the table lowest in “General, steering components” section. The nearest displacement Vvs generating

minimum 40 bar [580 psi]at Tws = 66.7 N•m [580 lbf•in] Vvs maximum = 80 cm3/rev [4.88 in3/rev]

So the closest combination on gear sets for this OSPED type will be: 80/395. So the numbers of steering wheel revolutions from lock to lock will be.

i = V/Vvc = 1850/395 = 4.7 turns lock to lock.

Danfoss | February 2022 BC152886485467en-000701 | 27

-4 -3 -2 -1 0 1 2 3 4

0.5 0.650.35 Us/U

0.540.460.430.40 0.57 0.60

-580 0 Can164-164-328-492 328 492 580

l/min

7.5

2.5

US gal/min

kwa1382113485871

7.5

Technical Information

OSPE Steering Valve

Technical Characteristics

EH-directional spools of OSPE

Cylinder flow characteristic for directional spools

A = valid for spools for nominal cylinder flow CQ = 12 l/min [3.17 US gal/min]

B = valid for spools for nominal cylinder flow CQ = 20 l/min [5.28 US gal/min]

C = valid for spools for nominal cylinder flow CQ = 30 l/min [7.97 US gal/min]

D = valid for spools for nominal cylinder flow CQ = 40 l/min [10.57 US gal/min]

E = valid for spools for nominal cylinder flow CQ = 50 l/min [13.21 US gal/min]

The curves are valid for OSPE with internal priority valve w. 7 bar [100 psi] spring and 1.0 mm [0.039 in] dynamic orifice and @ 60 l/min [15.85 US gal/min] pump flow.

For OSPE without internal priority valve, the curves are valid in combination with external priority valve OLS 80, 152B8269 @ 60 l/min [15.85 US gal/min] pump flow.

Pilot pressure relief valve: (P - T, Qp) characteristic

The pilot pressure relief valve protects the steering system against excessive pressure. The pilot pressure relief valve works together with the priority valve in the OSPE to limit the maximum

steering pressure P-T. The pilot pressure relief valve is set at an oil flow to the priority valve of 25 l/min [6.6 US gal/min].

Setting tolerance: rated value +10 bar [145 psi].

28 | © Danfoss | February 2022 BC152886485467en-000701

P-T P-T

barpsi

3500

3000

2500

2000

1500

1000

500

0 10 20 30 40 50 60 70 80 90

l/min

140 bar [2030 psi]

170 bar [2465 psi]

200 bar [2900 psi]

250

200

150

100

US gal/min

0 5 10 15 20

V301 217

P-EFP-EF

bar

0 10 20 30 40 50 60 70 80 90

min.

7 bar [102 psi]

10 bar [145 psi]

P301 218

psi

l/min

US gal/min

200

150

100

0 5 10 15 20

Technical Information

OSPE Steering Valve

Technical Characteristics

Pressure drop P-EF for Danfoss OSPE valve

This data comes from measurements on a representative sample of OSPE valves from production. Oil with viscosity of 21 mm2/s at 50 °C was used during measuring. Measurement is made when the pressure on the LS connection is zero. The minimum curve applies when the pressure on the EF connection is higher than the actual control spring pressure.

The curve for control spring pressure of 7 bar [100 psi] and 10 bar [145 psi] applies when pressure on the EF port is zero.

OSPE with priority valve spool

Danfoss | February 2022 BC152886485467en-000701 | 29

Ø82±0.3

45°

4.5

111

157

OSPE

Ø25.4

Ø44.4 ± 0.05

2.8

min. 7.1

127

111

71.5

55.5

36.5

146

P301 176.2

191

Technical Information

OSPE Steering Valve

Dimensions

OSPE dimensions with PVED-CLS

Metric-port version (ISO 6149-1):

P, T, EF: M22 x 1.5, 15 mm deep

L, R: M18 x 1.5, 14.5 mm deep

LS: M12 x 1.5, 11.5 mm deep

A: 4x M10 x 1.5, 16 mm deep

OSPED

OSPE

∅25.4

∅44.4 ±0.05

2.8

45°

min. 7.1

∅82±0.3

142

55.5

71.5

111

127

213

157

111

P301 176.11

Technical Information

OSPE Steering Valve

Dimensions

OSPE dimensions with PVED-CC/CL

Metric-port version (ISO 6149-1):

P, T, EF: M22 x 1.5, 15 mm deep

L, R: M18 x 1.5, 14.5 mm deep

LS: M12 x 1.5, 11.5 mm deep

A: 4x M10 x 1.5, 16 mm deep

Danfoss | February 2022 BC152886485467en-000701 | 31

Technical Information

OSPE Steering Valve

Dimensions

OSPE dimensions

Type L

OSPE 100 140 [5.51] 13.0 [0.51] OSPE 125 143 [5.63] 16.2 [0.64] OSPE 140 146 [5.75] 18.6 [0.73] OSPE 160 148 [5.83] 20.8 [0.82] OSPE 185 151 [5.94] 24.0 [0.95] OSPE 200 153 [6.02] 26.0 [1.02] OSPE 230 162 [6.38] 35.1 [1.38] OSPE 250 160 [6.30] 32.5 [1.28] OSPE 315 168 [6.61] 40.9 [1.61] OSPE 400 179 [7.05] 52.0 [2.05] OSPE 430 183 [7.20] 55.9 [2.20] OSPE 500 192 [7.56] 65.0 [2.56]

mm [in] mm [in]

OSPED dimensions

Type L

OSPED 60/120 193 [7.60] 9.1 [0.36] 9.1 [0.36] OSPED 60/185 201 [7.91] 9.1 [0.36] 16.2 [0.64] OSPED 60/220 205 [8.07] 9.1 [0.36] 20.8 [2.39] OSPED 70/170 197 [7.76] 9.1 [0.36] 13.0 [0.51] OSPED 70/320 216 [8.50] 9.1 [0.36] 32.5 [1.28] OSPED 80/240 206 [8.11] 10.4 [0.41] 20.8 [0.82] OSPED 80/395 226 [8.90] 10.4 [0.41] 40.9 [1.61] OSPED 100/260 209 [8.23] 13.0 [0.51] 20.8 [0.82] OSPED 100/300 214 [8.43] 13.0 [0.51] 26.0 [1.02] OSPED 125/285 212 [8.35] 16.2 [0.64] 20.8 [0.82] OSPED 125/440 232 [9.13] 16.2 [0.64] 40.9 [1.61]

mm [in] mm [in] mm [in]

P301 177

T L R

PVED CLS

Electronics

OSP

Prime

mover

SASA

GPS

Display/MMI

Vehicle speed

Mini wheel

Joystick

Working Hydraulic OC

Technical Information

OSPE Steering Valve

Hydraulic systems

OSPEC LSRM with PVED-CLS in a system with fixed gear pump, GPS receiver, joystick and mini wheel

The pump, the OSPE priority valve part and the working hydraulics must be protected by a separate pressure relief valve. The PVED-CLS monitors input from the GPS, MMI, joy stick, mini wheel, steering angle sensor (SASA) and signal from steering cylinder sensor. In case of unintended movement from the cylinder sensor, the PVED-CLS will remove power to the control valve for mode select/pilot dump, and in this way electrohydraulic actuation of steering cylinder is made impossible. The system turns into true safe state.

Danfoss | February 2022 BC152886485467en-000701 | 33

P301 178

T L R

PVED CLS

OSP

SASA

GPS

Display/MMI

Vehicle speed

Mini wheel

Joystick

Prime

mover

AUX

Working

Hydraulic CC

Technical Information

OSPE Steering Valve

Hydraulic systems

OSPEC LSRM with PVED-CLS in a system with variable pump, GPS receiver, joystick and mini wheel

The pump must have a built in pilot pressure relief valve to protect the OSPE, the priority valve part, the working hydraulics and the AUX function. AUX can be a brake system, which must have limited oil consumption to ensure steering capability in any case. Alternative pressure protection must be present in working and in AUX-hydraulic.

Technical Information

OSPE Steering Valve

System Safety

Emergency steering

OSPE and system safety PVES

The steering unit part of the OSPE acts like any other OSP steering units in case of no pump supply. In such case the gear wheel set acts as a hand driven pump, and so muscular power will be converted

from input torque and rotation on the steering wheel to hydraulic power in the form of pressure and flow out of the cylinder port to which side the steering is done. See Dimensioning steering system with OSPE

steering valve on page 27 in this catalog and page 28 in “General, steering components” for calculating

manual/emergency steering. Please see promotional brochure AV152886482496 for further information.

Fault monitoring

A fault monitoring system is provided in all PVES modules. The system is available as passive fault monitoring type, which provides a warning signal only.

•

Passive fault monitoring systems are triggered by three main events:

1. Input signal monitoring

The PVES input signal voltage is continuously monitored. The permissible range is between 15% and 85% of the supply voltage. Outside this range the section will switch into an active error state.

2. Transducer supervision

If one of the wires to the LVDT sensor is broken or short-circuited, the section will switch into an active error state.

3. Supervision of the closed loop

The actual position must always correspond to the demanded position (input signal). If the actual spool position is further than the demanded spool position (>12%, ), the system detects an error and will switch into an active error state. On the other hand, a situation where the actual position is closer to neutral than that demanded will not cause an error state. This situation is considered “in control”.

When an active error state occurs, the fault monitoring logic will be triggered:

Passive fault monitoring

•

A delay of 250 ms before anything happens.

•

The solenoid valve bridge will not be disabled but still control the main spool position.

•

An alarm signal is sent out through the appropriate pin connection, no. 3.

•

This state is not memorized. When the erroneous state disappears, the alarm signal will turn to passive again. However, the signal will always be active for a minimum of 100 ms when triggered.

To prevent the electronics from going into an undefined state, a general supervision of the power supply and the internal clock frequency is made. This function applies to PVES and will not activate fault monitoring:

1. High supply voltage

The solenoid valves are disabled when the supply voltage exceeds 36 V, and the main spool will return/stay in neutral.

2. Low supply voltage:

The solenoid valves are disabled when the supply voltage falls below 8.5 V, and the main spool will return/stay in neutral.

3. Internal clock

The solenoid valves are disabled when the internal clock frequency fails, and the main spool will return/stay in neutral.

Danfoss | February 2022 BC152886485467en-000701 | 35

Technical Information

OSPE Steering Valve

System Safety

Safety considerations

On-road operation

Warning

The PVES or PVED-CLS shall be de-energized while driving on-road. It is the OEMs responsibility to establish the necessary means to inform and de-energize the PVE from the cabin when driving on public roads.

The Danfoss range of PVE actuators are single string designs with limited on board fault monitoring. Danfoss strongly recommends application of vehicle specific safety monitoring systems that will detect non-conforming steering and effectively disable electrohydraulic actuators or issue appropriate warnings as the case may be. A minimum safety system should include a manual power switch to electrical power off electrohydraulic actuators while driving on public roads.

For details, see:

•

Technical information, PVE Series 4

•

User Manual PVED-CLS controller for Electro-Hydraulics Steering

or contact Danfoss Technical Support Team

Technical Information

OSPE Steering Valve

Order Specification

Variants and order specification

Specification table for Danfoss OSPE steering valve

Part Variants

OSP Gear set, cm3/rev Single 100, 125, 140, 160, 185, 200, 230, 250, 315, 400, 430, 500

Dual, ”D”-type

Spool/sleeve set type “C”-dynamic, “F”-dynamic Circuit type LS (Non-Reaction) LSRM (Reaction Motoring)

Actuation module Type PVES

Connection AMP (A) DEUTSCH (D) Coil for control valve/pilot dump Connection AMP (A) DEUTSCH (D) EH-directional spool Cylinder flow, l/min 12 20 30 40 50 Priority valve With spool, nominal flow, l/min 90 45

Spring force, bar 7 10

Without spool No EF port present. P-flow determined by steering demand only Housing (see table below) Thread Metric Relief valve Bar 100 - 210 Shock valves Bar 160 - 260

Only available with DEUTSCH 6-pin connector

Only available with DEUTSCH 12-pin connector

60/120, 60/185, 60/200, 60/220, 60/260, 60/290 70/140, 70/170, 70/195, 70/230, 70/270, 70/320, 70/385 80/160, 80/205, 80/240, 80/280, 80/395 100/200, 100/260, 100/300, 100/415 125/250, 125/325, 125/440

PVED-CC PVED-CLS

Housing threads

Port P, T & EF L & R LS

Metric, ISO 6149-1

O-ring chamfer on port connection

Spot face around port connection

M 22 x 1.5 – O3* + S

M 18 x 1.5 – O3 + S4** M 12 x 1.5 – O3 + S

Warning

OSPEF w. displacement < 250 cc/rev. and integrated priority valve not to be used!

Using a combination of OSPEF with displacement < 250 cc/rev. and integrated priority may cause oscillations in steering system. Therefore, do not specify such combinations. The OSPEC is recommended for use when displacement is smaller than 250 cc and if integrated priority valve is needed.

Specify the OSPE in the OSPE Design Center Configure with MMC format shown in OSPE master model

code (MMC) breakdown on page 38.

Danfoss | February 2022 BC152886485467en-000701 | 37

Technical Information

OSPE Steering Valve

Order Specification

OSPE master model code (MMC) breakdown

Sample model code: OSPE-D-C-100-240-LSRM-20-CLSA-AA-202-NN-NN-D-12-NN-EF-D-07-NN-08-07-10-M-A-MM-S-P-

P-210-260-A-A-AA-HH-R-NN-SR-N-DS-PB-SWID000123

Position 0 1 2 3 4 5 …

OSPE - D - C - 100 - 240 - LSRM …

Position Characteristic Position Characteristic

0 Product type 21 LS orifice 1 Gear set type 22 Steering column interface type 2 Spool/sleeve set type 23 Ports standard 3 Emergency steering displacement 24 Ports sizing 4 Total steering displacement 25 LS side port plug 5 Circuit type 26 LS front port 6 Electrohydraulic flow, nominal 27 EF port 7 PVE actuator 28 Relief valve setting 8 Firmware type 29 Shock valve setting 9 Firmware revision 30 Anti-cavitation valves 10 Firmware package 31 Check-valve in P and LS 11 Additional information 32 Spool/sleeve set centering springs 12 Cut off coil connector 33 Spool/sleeve set 13 Cut off coil voltage 34 Gear set option 14 Integrated priority valve 35 Special feature 15 Excess flow 36 Housing type 16 Integrated priority valve type 37 AUX port 17 Integrated PV spring 38 Label 18 P-LS orifice 39 Paint 19 Dynamic orifice 40 Software ID 20 PP orifice

Danfoss Power Solutions GmbH & Co. OHG

Krokamp 35 D-24539 Neumünster, Germany Phone: +49 4321 871 0

Danfoss Power Solutions ApS

Nordborgvej 81 DK-6430 Nordborg, Denmark Phone: +45 7488 2222

Danfoss Power Solutions (US) Company

2800 East 13th Street Ames, IA 50010, USA Phone: +1 515 239 6000

Danfoss Power Solutions Trading (Shanghai) Co., Ltd.

Building #22, No. 1000 Jin Hai Rd Jin Qiao, Pudong New District Shanghai, China 201206 Phone: +86 21 2080 6201

Products we offer:

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www.hydro-gear.com

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www.daikin-sauer-danfoss.com

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•

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•

valves Electric converters

•

Electric machines

•

Electric motors

•

Gear motors

•

Gear pumps

•

Hydraulic integrated

•

circuits (HICs) Hydrostatic motors

•

Hydrostatic pumps

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Orbital motors

•

PLUS+1® controllers

•

PLUS+1® displays

•

PLUS+1® joysticks and

•

pedals PLUS+1® operator

•

interfaces PLUS+1® sensors

•

PLUS+1® software

•

PLUS+1® software services,

•

support and training Position controls and

•

sensors PVG proportional valves

•

Steering components and

•

systems Telematics

•

Danfoss Power Solutions is a global manufacturer and supplier of high-quality hydraulic and electric components. We specialize in providing state-of-the-art technology and solutions that excel in the harsh operating conditions of the mobile off-highway market as well as the marine sector. Building on our extensive applications expertise, we work closely with you to ensure exceptional performance for a broad range of applications. We help you and other customers around the world speed up system development, reduce costs and bring vehicles and vessels to market faster.

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Go to www.danfoss.com for further product information.

We offer you expert worldwide support for ensuring the best possible solutions for outstanding performance. And with an extensive network of Global Service Partners, we also provide you with comprehensive global service for all of our components.

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Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequent changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

Danfoss | February 2022 BC152886485467en-000701

Danfoss OSPE User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

A wide range of steering components

Conversion factors

Survey of literature on Danfoss steering components

General Information

General steering valve type OSPE

Versions

Overview

OSPEC LS/LSRM with PVED-CLS

OSPEF LS with PVED-CLS

OSPEDC LSRM with PVES

OSPEDF LS with PVES

PVED-CL/CLS

OSPE Steering Valve

Function

OSPEC LSRM with PVED-CLS

Neutral position

Steering right with steering wheel

Steering right with EH

PVES and PVED-CLS, electrical actuation

Closed loop control

Principle

Inductive transducer, LVDT

Integrated pulse width modulation

Technical Data

OSPE

Weights

PVES

PVED-CLS

Hysteresis, PVES and PVED-CLS

PVES

Coil of control valve for mode select

Dimensioning

Dimensioning steering system with OSPE steering valve

Technical Characteristics

EH-directional spools of OSPE

Pilot pressure relief valve: (P - T, Qp) characteristic

Pressure drop P-EF for Danfoss OSPE valve

Dimensions

OSPE dimensions with PVED-CLS

OSPE dimensions with PVED-CC/CL

Hydraulic systems

System Safety

Emergency steering

OSPE and system safety PVES

Safety considerations

Order Specification

Variants and order specification

OSPE master model code (MMC) breakdown