Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1990-11-15
1992-09-29
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303110, 36442602, B60T 852
Patent
active
051509520
ABSTRACT:
The invention is directed to an anti-skid control system for controlling a braking force applied to each of the road wheels with a hydraulic braking pressure supplied to a wheel brake cylinder through pressure control means. A wheel speed of each of the road wheels is detected. Then, an estimated vehicle speed for each of the road wheels is calculated on the basis of the wheel speed and a decreasing rate of estimated vehicle speed for at least one of the road wheels other than the road wheel for which the estimated vehicle speed is being calculated. The estimated vehicle speed is, therefore, prevented from being set largely below the actual speed of the vehicle. The pressure control means is provided for increasing, holding or decreasing the hydraulic braking pressure in response to a result of comparison between the estimated vehicle speed and the wheel speed for each of the road wheels.
REFERENCES:
patent: 3776357 (1973-12-01), Arai et al.
patent: 4629259 (1986-12-01), Brauninger
patent: 4717209 (1988-01-01), Hagiya et al.
patent: 4748564 (1988-05-01), Matsuda
patent: 4762375 (1988-08-01), Maki et al.
patent: 4763260 (1988-08-01), Sakuma et al.
patent: 4790607 (1988-12-01), Atkins
patent: 4919494 (1990-04-01), Hagashimata et al.
Ichikawa Hiroyuki
Kuwana Kazutaka
Tozu Kenji
Yoshida Tsuyoshi
Aisin Seiki Kabushiki Kaisha
Graham Matthew C.
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