Bendix Commercial Vehicle Systems ABS OPERATORS MANUAL - Manual (Page 7)

7
U NDERSTANDING T HE RSP ® R OLL S TABILITY S YSTEM
What Is RSP?
RSP roll stability system is an optional stability feature for Bendix ® ABS equipped
vehicles that reduces the risk of rollovers.
How Does RSP Improve Vehicle Roll Stability?
The RSP system counteracts the tendency of a vehicle, or vehicle combination,
to tip over while changing direction (typically, while turning). The lateral forces
during a turn can push a truck or tractor-trailer horizontally and, if the friction
between the tires and the road is sufficient, the vehicle may begin to tip and
potentially could roll over.
To reduce the risk of rollover, the RSP system detects potential rollover conditions
and slows the vehicle both by reducing engine throttle (and hence, engine
torque) and by applying the tractor and trailer service brakes as needed.
WARNING! During an RSP system intervention, the vehicle automatically
decelerates. The RSP system can slow the vehicle with or without you
applying the brake pedal, and even when you are applying the throttle.
During an RSP system intervention, you can always use your service brake
pedal to increase the braking pressure that will be applied. However, if you
were to apply less braking pressure than needed — or even if you release the
brake pedal entirely during an RSP intervention — the RSP system will continue
to apply the necessary amount of braking pressure automatically to the
appropriate wheels to mitigate a potential rollover.
A Real World Example Of
How RSP Operates:
Excessive speed for road conditions
creates forces that exceed the
threshold at which a vehicle is likely
to rollover on a higher-friction
surface.
RSP automatically reduces engine
torque and applies the service brakes
(based on the projected rollover risk)
to reduce the vehicle speed, thereby
reducing the tendency to roll over.