Vehicle braking system for drive wheels, having means for determ

Details Vehicle braking system for drive wheels, having means for determ Vehicle braking system for drive wheels, having means for determ

1988-04-25

1989-06-27

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303 95, 303108, 303 68, B60T 860

Patent

active

048423432

ABSTRACT:
Control system for controlling an anti-lock braking system having a brake for a wheel of a motor vehicle, wherein a skidding or locking condition of the wheel is detected by a detector based on a running condition of the vehicle and a rotating condition of the wheel, and a slip ratio of the vehicle is maintained within an optimum range by a pressure-regulating device, by increasing, decreasing and holding a brake fluid pressure applied to the brake, in response to the detected locking condition of the wheel. A predetermined pressure-decrease time during which the fluid pressure is decreased is measured by a measuring device, and a deceleration rate of a rotating speed of the wheel when the pressure-decrease time has elapsed is detected by a detecting device. A device is provided for determining an extension time during which the fluid pressure is further decreased, such that the extension time increases with the detected deceleration rate of the wheel. The pressure-regulating device is activated to further decrease the fluid pressure for the determined extension time.

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patent: 4671579 (1987-06-01), Sawano et al.
patent: 4763960 (1988-08-01), Uchida et al.

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