Scania DC16, DC13, DC09 Service Manual
INSTALLATION
MANUAL
©
Scania CV AB 2014, Sweden
01:02 Issue 6 en-GB 1
Intake system and ventilation
Industrial engines
DC09, DC13, DC16
INSTALLATION
MANUAL
©
Scania CV AB 2014, Sweden
01:02 Issue 6 en-GB 2
Intake air ..................................................................................................................3
Intake air taken from outside engine compartment............................................. 4
Intake air taken from engine compartment ......................................................... 7
Air cleaners ..............................................................................................................8
Air cleaners with precleaner................................................................................ 9
Air cleaners without precleaner......................................................................... 10
Crankcase ventilation............................................................................................11
Open crankcase ventilation ............................................................................... 11
Closed crankcase ventilation............................................................................. 12
Connection to turbocharger .................................................................................13
Cleanliness requirement .................................................................................... 13
Charge air pipe .................................................................................................. 13
Stage IV/Tier 4f engines ................................................................................... 14
INSTALLATION
MANUAL
©
Scania CV AB 2014, Sweden
Intake air
01:02 Issue 6 en-GB 3
Intake air
If the intake line is located close to exhaust pipes or other hot parts, radiation protection should be used to limit unnecessary heating of the intake air.
REQUIREMENT!
The temperature of the intake air must not exceed the ambient temperature by more
than 5°C.
If the intake air temperature upstream of the turbocharger continuously exceeds
30°C, then engine power may drop. If the engine is enclosed in some manner, make
sure that there is an adequate flow of intake air.
The dependence of the engine power on intake air temperature is shown in the chart
on the right. 100% engine power is shown under actual test conditions at the factory.
The engine air consumption in kg/min at full power and at different engine speeds is
indicated in the tables showing the air consumption and radiated heat for the relevant
engine type under Technical data in the Installation manual.
100
95
90
%
A
B
10 20 302540 50
°C
340 422
Engine power dependence on intake air temperature. 100% at 25°C, 1,000 mbar, engine power setting not corrected
A = Engine power
B = Intake air temperature
INSTALLATION
MANUAL
©
Scania CV AB 2014, Sweden
Intake air
01:02 Issue 6 en-GB 4
Intake air taken from outside engine compartment
In engine systems where the engine intake air comes from outside the engine compartment and is led via a fresh air line to the engine, the pressure drop for the intake
system should be measured.
The air intake should be located so that the intake air is as clean as possible and so
that neither the engine exhaust gases nor heated air from the engine compartment can
mix with the intake air.
The intake air must not contain chemical pollutants, such as CFCs.
The air intake should be designed to exclude water, snow and contamination.
Maximum permissible pressure drop is 30 mbar. This value includes the pressure
drop in the new air filter, connected coarse filter and in the fresh air line.
INSTALLATION
MANUAL
©
Scania CV AB 2014, Sweden
Intake air
01:02 Issue 6 en-GB 5
The following applies to the fresh air line:
• The fresh air line must not be routed with any sharp bends.
• The inside of the fresh air line must be flat and even.
• If a hose is used as a fresh air line, it must be hard so that it does not collapse onto
itself.
It is not necessary to check the pressure drop in the following cases:
• The intake system comprises air hoses and air pipes from Scania's standard range.
• If the fresh air line is maximum 5 m and has an inside diameter of at least 160 mm
for DC09 or 210 mm for DC13 and DC16, respectively.
If the planned fresh air line is longer than 5 m, the required diameter must be calculated as illustrated. The vacuum upstream of the turbocharger must then be measured.
The pressure drop measurement is normally made at the vacuum indicator. If the line
between the filter and turbocharger is not a Scania standard line, the pressure drop
should be measured on a straight section as close to the turbocharger as possible.
IMPORTANT!
The total pressure drop with a blocked air filter must not exceed 65 mbar.
Engine damage will not occur up to 100 mbar, but fuel consumption and smoke will
increase. Above 100 mbar there is a risk that the air volume to the engine will be inadequate, resulting in breakdowns.
100
200
300
400
25m
5m
10 20 30 40 50
A (mm)
(m /min)
3
B
340 421
Calculation of minimum diameter of the intake line
A = Intake line diameter
B = Air consumption
INSTALLATION
MANUAL
©
Scania CV AB 2014, Sweden
Intake air
01:02 Issue 6 en-GB 6
Ventilation of the engine compartment with fresh air line to the
engine
When the intake air to the engine is taken from outside the engine compartment, it is
important to check that the temperature in the engine compartment does not exceed
90°C. If the temperature exceeds this value, there is a risk that the engine's electric
components and control unit will malfunction.
If there is a risk that the temperature will exceed 90°C, the engine compartment must
be ventilated.
When dimensioning the engine compartment ventilation, other air consumers in the
engine compartment must also be considered.
The amount of radiated heat emitted by various engines is indicated under Technical
data in the Installation manual.
The exhaust pipes should be insulated to reduce the radiated heat in the engine compartment. See Exhaust system in the Installation manual.
Loading...