The Anti-lock Braking System (ABS) helps prevent the possibility
of wheel lockup under hard braking, and rapidly pulses the brakes to help you retain steering control as you come to a stop.
Not exact matches
This however does not hold true for rear
wheel drive vehicles which can have a strong weight transfer (high, soft - suspension cars, as most US vehicles), as the added braking force on the rear
wheels without added (weight - transfer caused) friction could cause
wheel lockup and possibly loss
of control
of the vehicle.
Foot braking only will likely cause
wheel lockup, as the ABS system has limited capabilities at low speeds and whithout it you are applying the same amount
of braking force to all
wheels.
Automatically optimizes the front - to - rear brake force distribution to reduce the tendency
of rear
wheel lockup, especially when the vehicle is unloaded.
When impending
wheel lockup is detected, the computer signals the hydraulic control unit to apply and release (automatically «pumping») the brakes several times per second with split - second timing, providing a level
of braking efficiency that even professional race car drivers can not duplicate and resulting in shorter stopping distances and greater braking and steering control
Conventional automatic transmissions provide greater torque from a stop because
of the torque converter, but they waste significant amounts
of fuel until the
lockup clutch is engaged, at which point the impeller and pump
wheels of the converter are bypassed using a wet clutch.
The drive - train features electronic differential locking that offers 100 percent
lockup of all six
wheels.
A total
of 57 accidents and 22 injuries have been attributed to the problems, NHTSA said.Complaints include excessive brake - pedal travel, hard pedaling and
wheel lockup, NHTSA said.The problem could affect 1,445,790 S - series and T - series pickups and sport - utilities from the 1991 - 94 model years.
In one type
of system, ABS reduces brake pressure to both rear
wheels whenever one approaches
lockup.
Wheel lockup can result in longer stopping distances, loss
of steering control and, when road friction is uneven, loss
of stability if the vehicle begins to spin.
The brake - force distribution helps prevent
wheel lockup and improves stopping power as the weight
of the vehicle shifts during stops.
1991 BMW 525: Four complaints
of steering
wheel lockup while the car was moving.
1993 Honda Civic: Three complaints
of steering
wheel lockup while the vehicle was in motion.
With a car,
wheel lockup might cause a skid, but on a motorcycle, it often means a loss
of balance and a potentially deadly fall.
Running a unique set
of ratios, including a very short 4.80:1 first and a heavily overdriven 0.671:1 seventh gear, it channels drive to the rear
wheels through a newly developed version
of the BMW M division's electronically operated Active M differential, capable
of providing continuously variable
lockup to each
of the rear
wheels and imbued with a 3.15:1 final drive.
It is very likely that front
wheel lockup would reduce the roll instability
of the vehicle since the lateral acceleration would be reduced.