Fluid-pressure and analogous brake systems – Pipeless valves
Patent
1988-10-18
1989-10-10
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Pipeless valves
303119, 73121, B60T 888
Patent
active
048727300
ABSTRACT:
A braking control apparatus for use in a motor vehicle having at least one wheel comprising a master cylinder for generating a hydraulic pressure in response to a braking operation of a vehicle driver, an accumulator for accumulating a hydraulic pressure and at least one wheel braking cylinder for braking the wheel in accordance with a hydraulic pressure supplied thereinto. A passage system is provided so that the wheel braking cylinder is communicated therethrough with the master cylinder and the accumulator. In the passage system are provided first and second change-over valves for cutting off the pressure from the master cylinder, cutting off the pressure from the accumulator and a third control valve disposed between the wheel braking cylinder and the master cylinder or the accumulator for establishing and cutting off the communication therebetween. An control unit controls the operations of the first to third valves so as to, in response to cutting off the communication with the accumulator, establish the communication with the wheel braking cylinder, and then establish the communication with the master cylinder. This valve control prevents the high-pressure remaining in the passage system after the cutting-off of the communication with the accumulator from being rapidly applied to the master cylinder.
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Ido Noriyuki
Inoue Yoshiaki
Nomura Yoshihisa
Ohno Sadayuki
Suzuki Hideaki
Butler Douglas C.
Nippondenso Co. Ltd.
Toyota Jidosha & Kabushiki Kaisha
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