BENDIX BW2671 User Manual

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BENDIX® ESP® FULL STABILITY SYSTEM

AN INTELLIGENT INVESTMENT IN STABILITY
FOR VOCATIONAL VEHICLES

The Bendix ESP stability system is a full stability system designed to help
mitigate rollovers and loss-of-control on a wide variety of road conditions. Full
stability delivers more performance than roll-only systems, thanks to additional
sensors and braking capability.

Safety Is The Bottom Line

Most people don’t think of a stability system as contributing to the bottom line.
But when you consider the costs of accident related vehicle damage, down­time, clean-up etc... it’s easy to see how it does. For fleets looking to reduce
incident potential and improve profitability, the Bendix ESP full stability system
provides proven value.

A Competitive Advantage For Your Fleet

Does more than just rollover mitigation – Bendix ESP also addresses many of the
"loss of control" situations that can lead to rollovers or other accidents

.

• Protect Profitability – Every dollar you save through incident reduction
goes directly to the bottom line. Consider this… just to stay profit
(bottom line) neutral, a fleet operating at a 5% margin would need
to increase revenue by 20 times the cost of accident related losses.
That means reducing accident costs by $100,000 is equivalent to
growing top line sales by 2 million dollars.

• Promote Customer Satisfaction – An accident can result in a late
delivery or even damage to your customer’s property, which can build
ill-will and loss of confidence. Alternately, an investment in a stability
system demonstrates the added value that your fleet provides.

• Enhance Driver Training – With vocational vehicles, often drivers
don’t know the vehicle is tipping because they can’t feel what’s
happening until it’s too late. Take cement mixers, for example: an
asymmetrical load can alter the vehicle’s center of gravity (CG) without
driver knowledge, leading to a rollover situation. The Bendix ESP full
stability system can not only help to mitigate this event, but driving data
can be monitored and used as a proactive training tool.

• Strengthen Operational Efficiency – The reliability of genuine Bendix
components, the familiarity of an ABS-based system, along with
a portfolio of easy-to-use diagnostic tools means less training
and more vehicle up-time.

• Boost Driver Retention – A commitment to safety improves driver
morale and can reduce the potential of drivers leaving the
profession or going to a competitor.

The Full Stability Solution

Bendix® ESP® is the first widely available ABS-based truck stability system
capable of recognizing and assisting with both rollover and vehicle under­and over-steer driving situations on the widest range of road conditions.
With key sensors and braking capability, including steer axle braking,
Bendix ESP provides a higher level of stability on both dry and wet
surfaces than systems that only focus on rollover mitigation.
Features include:

• Bendix ESP – Bendix ESP helps in both rollover and loss-of-control
situations. The system helps to mitigate vehicle slides, skids and
loss-of-control through advanced monitoring of a variety of vehicle
parameters and automatic and selective application of vehicle brakes.
Bendix ESP, through its roll stability program, helps to mitigate
rollovers through advanced sensing and automatic application of
vehicle brakes.

• Bendix

• Core ABS – Prevents wheel lock-up to help drivers maintain

• Diagnostics – Bendix offers a suite of diagnostic tools to keep your

®

Smart ATC™ – Unlike other traction control products, the

®

Bendix

Smart ATC™ traction control system makes adjustments
based on the vehicle orientation (straight vs. curve) and the driver’s
throttle input.

steering control while braking. Core ABS is compliant with FMVSS 121
for air brake systems.

trucks on the road. From traditional blink codes and “Chuff” at vehicle
start, to a portable remote diagnostic unit (RDU), and Bendix
our comprehensive, computer-based diagnostic software.

®

ACom®,

Bendix® ESP® Full Stability System –

What is it and how does it work?

The Bendix® ESP® full stability system continuously monitors a

variety of vehicle parameters to determine if the vehicle is reaching

a critical stability threshold. When such a situation develops, the

Bendix ESP full stability system will quickly and automatically intervene to

assist the driver. The system can selectively apply vehicle brakes,

as well as de-throttle the engine typically faster than a human.

However, no stability system replaces the most important safety

components of all... a skilled, alert professional driver exercising safe

driving habits, as well as continuous, comprehensive driver training.

• Serviceability – Because Bendix ESP is an ABS-based system, most
of the components are the same familiar parts used on your current
ABS and ATC system. The additional stability system components
are based on proven technology and require only simple direct part
replacement.

electronics

BENDIX® ESP® FULL STABILITY SYSTEM

Driving Scenario:

The vehicle speed around a curve exceeds the ability for the tires to
hold the vehicle orientation, causing the vehicle to slide and begin to
over-steer. The momentum of the load further pushes the truck,
exacerbating the situation.

Driving Scenario:

A vehicle enters a curve too fast, on high friction pavement, resulting
in high lateral (side) forces acting at the vehicles center of gravity (CG).
The high friction between the wheels and the pavement create a
“hinge” effect allowing the forces at the CG to push the vehicle over.

System Response:

The Bendix ESP full stability system senses the driver’s intended path and
compares it to the actual situation to identify an over-steer situation. In an
attempt to correct the vehicle orientation and reduce speed if required, the
system quickly applies braking pressure to only the appropriate wheels.

System Response:

The Bendix ESP full stability system applies pressure to all truck brakes
and reduces engine throttle to quickly reduce vehicle speed and therefore
mitigate the tendency of the vehicle to roll over.

The Importance Of Full Stability... Bendix ESP For Straight Trucks

Rollovers and loss-of-control situations happen in the blink of an eye. That's why a full stability system makes sense for straight truck applications.
Stability for vocational vehicles needs to:

1) Detect potential instability situations quickly and completely;

2) Intervene quickly and accurately;

3) Apply ample braking where needed; and

4) Perform on wet, snow and ice covered surfaces.

The table below identifies the key features and components of the Bendix ESP full stability system:

Feature What it does Why it matters Bendix ESP
Wheel Speed Sensor Monitors the wheel rotation at individual Allows the system to determine vehicle speed 

wheels and monitor wheel lock-up to optimize braking
Lateral Acceleration Sensor Senses the side or lateral forces acting Side or lateral forces are used to detect 

on the vehicle a roll situation

Steering Angle Sensor Senses the driver’s steering An early indicator of a potential critical maneuver.
and direction Helps the system to respond faster
and more accurately

Brake Pressure Sensors Measures the driver’s braking demand Allows the system to accurately supplement

Bendix ESP

the driver throughout the maneuver

Sensor Technology

Yaw Rate Sensor Senses the rotation of the vehicle Allows the system to monitor the true
orientation of the vehicle and compare it to the
driver’s intention

Multi-level Sensing Cross checks multiple system sensors Improves the reaction time and accuracy of the 
intervention

Tuning Different vehicles have different stability Improves the ability of the stability system to
characteristics. Tuning adapts the stability match the intervention of the situation
system to account for these differences

Bendix ESP

All Axle Braking The ability to apply brakes at all axles Provides the best opportunity to reduce vehicle
speed in the shortest time

Performance

Enhancement

Individual Corner Braking The ability to apply individual brakes Provides the capability to control under- and
over-steer situations

The Bendix ESP full stability system helps you make an intelligent investment
in stability. For more information talk to your Bendix Account Manager, call
1-800-AIR-BRAKE (1-800-247-2725) or visit www.bendix.com today.

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Bendix Commercial Vehicle Systems LLC • 901 Cleveland Street • Elyria, Ohio 44035 • 1-800-AIR-BRAKE • www.bendix.com
BW2671 ©2011 Bendix Commercial Vehicle Systems LLC, a member of the Knorr-Bremse Group • 04/11 • All Rights Reserved • Printed in U.S.A.

ESP® is a registered trademark of Daimler AG and is used by Bendix CVS under license.