BENDIX BW2472 User Manual
electronics
BENDIX® ESP® FULL STABILITY SYSTEM
AN INTELLIGENT INVESTMENT IN STABILITY
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, Bendix
provides proven value.
A Competitive Advantage For Your Fleet
®
ESP® full stability system
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 tractor-trailer combinations, often drivers
don’t know the vehicle is tipping because they can’t feel what’s
happening until it’s too late. The Bendix ESP full stability system can not
only help to mitigate those events, 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.
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.
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,
ESP provides a higher level of stability on both dry and wet surfaces than
systems that only focus on rollover mitigation. Features include:
• Bendix
• Bendix
• Core ABS – Prevents wheel lock-up to help drivers maintain
• Diagnostics – Bendix offers a suite of diagnostic tools to keep your
• Serviceability – Because Bendix ESP is an ABS-based system, most
®
ESP® – Bendix ESP helps in both rollover and loss-of-control
situations. The system helps to mitigate vehicle jackknifes, 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.
®
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.
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.
®
ACom®,
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 tractor to slide and begin to
over-steer. The momentum of the trailer further pushes the tractor,
exacerbating the situation.
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.
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 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 Tractor-Trailers
Rollovers and loss-of-control situations happen in the blink of an eye. That's why a full stability system makes sense for tractor-trailer applications.
Stability for tractor-trailers 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 and Provides the capability to control under- and
trailer brakes 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.
Bendix Commercial Vehicle Systems LLC • 901 Cleveland Street • Elyria, Ohio 44035 • 1-800-AIR-BRAKE • www.bendix.com
BW2472 ©2011 Bendix Commercial Vehicle Systems LLC, a member of the Knorr-Bremse Group • 04/11 • All Rights Reserved
ESP® is a registered trademark of Daimler AG and is used by Bendix CVS under license.
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