Vehicle brake system
AssigneeRobert Bosch GmbH
InventorHeinz Leiber
Life of this patent
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Abstract
A vehicle brake system is proposed, which has a wheel brake cylinder that can be placed under pressure either by a main cylinder or by a servopressure supply apparatus, and which is further provided with an anti-wheel lock apparatus that has a multiple-position valve for monitoring a line passage to the brake cylinder. Both before and after the multiple-position valve there is provided a pressure gauge which is selectively actuated either electrically or hydraulically, the input signals of which are compared with one another. The result is delivered as a control signal to the multiple-position valve. In this manner, it is possible to use a conventional main cylinder for a vehicle brake which has amplification and anti-wheel-lock provisions. The vehicle brake system is preferably usable in passenger vehicles or lightweight commercial vehicles.
Claims18
A vehicle brake system having a main cylinder which supplies hydraulic pressure to hydraulic brake cylinders associated with the vehicle wheels, said system further having an anti-wheel-lock apparatus and includes a multiple-position valve for switching a line passage to the brake cylinders, and controlling a servopressure supply apparatus, characterized in that said main cylinder and the servopressure supply apparatus are connected in parallel to said multiple-position valve, said system further including a pair of pressure gauges with one gauge disposed before said multiple-position valve, said pressure gauges arranged to receive hydraulic fluid under pressure and to emit output signals which are compared with one another in an electronic braking comparison unit and further wherein the result of comparison can be delivered as a control signal to said multiple-position valve.
Dependencies are inferred from the claim text.