Dual-circuit brake apparatus
AssigneeRobert Bosch GmbH
InventorHeinz Leiber
Life of this patent
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Abstract
A dual-circuit brake system which is combined with an anti-wheel-lock apparatus, also known as an anti-skid braking system. Between the two brake circuits I and II, in the vicinity of the anti-skid magnetic valves, a pressure sensor is provided which responds when there are unequal pressures in the two brake circuits I and II and with the aid of pre-programmed test cycles in an electronic control unit of the anti-skid braking system enables the monitoring of the functioning of the magnetic valves. The apparatus is preferably usable in passenger vehicles in the higher price ranges.
Claims9
A dual-circuit brake system having a three-position pressure sensor in said system for monitoring dual brake pressures which occur at various times in said dual brake circuits, said pressure sensor being equipped with a double piston formed with oppositely disposed axially aligned oblique faces which is subjected to the pressure of said dual brake pressures and with an electrical switch disposed between and actuated via said oblique faces of said double piston, characterized in that said dual-circuit brake system is combined with an anti-skid braking apparatus equipped with magnetic valves and that said pressure sensor is disposed in said brake circuits between said magnetic valves of the anti-skid braking apparatus and wheel-cylinders of said braking system, said anti-skid braking apparatus further including an electronic control unit, said electronic control unit is provided with an evaluation circuit for signals of said pressure sensor as well as at least one pre-programmed test cycle for the purpose of automatically running a test.
Dependencies are inferred from the claim text.