Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1988-10-07
1990-07-24
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
188181C, 303 962, 303100, 303119, 303115, B60T 826, B60T 832
Patent
active
049431234
ABSTRACT:
In a braking apparatus for use in a motor vehicle which supplies hydraulic pressure from a master cylinder to wheel braking cylinders for front-side and rear-side wheels, a braking force adjusting device is provided in common between the master cylinder and the front-side and rear-side wheel braking cylinders to adjust the hydraulic pressure to be applied to the front-side and rear-side wheel cylinders. A proportioning valve controls the hydraulic pressure to the rear-side wheel braking cylinder to become lower than the hydraulic pressure from the braking force adjusting device by a predetermined ratio. The proportioning valve is adapted to change the predetermined ratio in accordance with a control signal to prevent the rear-side wheel from locking. The control signal to the proportioning valve is determined on the basis of information representing an excessive degreee of braking force obtained in accordance with the states of the front-side and rear-side wheels during the braking operation.
REFERENCES:
patent: 3871713 (1975-03-01), Lister
patent: 3980344 (1976-09-01), Burckhardt
patent: 4418966 (1983-12-01), Hattwig
patent: 4505520 (1985-03-01), Maehara
patent: 4547022 (1985-10-01), Brearley et al.
patent: 4626038 (1986-12-01), Hayashi et al.
patent: 4715663 (1987-12-01), Hattori et al.
patent: 4804235 (1989-02-01), Matsumara
Kamiya Sigeru
Suzuki Satosi
Takeda Kenji
Yoshino Yasuhisa
Butler Douglas C.
Nippon Soken Inc.
Nippondenso Co. Ltd.
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