Active Safety Technologies - Discern the definitions of systems that help you handle the unforeseen.
By The Editors/autoMedia.com
|Electronic Brake-force Distribution (EBD) |
What it is: EBD is included in some ABS systems; it electronically
distributes the brake hydraulic pressure between front and rear wheels
depending on vehicle load and driving conditions.
How it works: EBD monitors the load on the front and rear axles, then
via the ABS controller it sends relatively more braking power to the axle with
the greater load.
What it feels like: EBD functions invisibly, so the driver is unaware
of its operation.
How it benefits the driver: EBD helps ensure that the front and rear
tires share the braking loads more effectively under all conditions, which
results in better braking performance.
What it is: Brake Assist is included in some ABS systems, and helps the
driver apply brakes more fully in an emergency-braking situation.
How it works: When the driver steps suddenly and forcefully on the
brake pedal, as he or she would in an emergency, Brake Assist aids in the
application of the brakes to help ensure the shortest possible stops.
What it feels like: Most drivers won't specifically notice Brake Assist
in operation, though they might detect strong braking performance in "panic
How it benefits the driver: Brake Assist makes the most of the
vehicle's braking capability in emergency braking situations, which can
shorten stopping distance.
What it is: Traction Control is an electronic system that automatically
keeps the drive wheels (either front, rear, or both in the case of an AWD or
4WD vehicle) from spinning during acceleration. This improves traction and
vehicle stability in slippery driving conditions. Also known as Electronic
How it works: A microprocessor compares the rotational speed of the
vehicle's front and rear wheels while also tracking such values as throttle
opening. When one of the drive wheels loses traction, its rotational speed
quickly rises compared to that of the other wheels. When this happens, the
electronic control unit signals the engine to reduce power output and/or
rapidly pulses the brake for the wheel that is spinning. The brake pulsing is
done via the Anti-lock Braking System hydraulic pump. All cars that have
Traction Control also have ABS (see above).
What it feels like: Traction Control activation can feel somewhat
different from vehicle to vehicle. When the system activates there is
generally a momentary delay in acceleration as the spinning wheel is brought
under control. Then the vehicle smoothly accelerates ahead.
How it benefits the driver: The most important benefit of Traction
Control is that it helps the driver retain control while accelerating on
slippery surfaces such as snow, ice or water – or even dirt roads or trails
for SUVs. It can also help high-powered cars maintain traction in a straight
line or while accelerating on roads that have rough or uneven pavement.