Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1987-11-04
1990-02-13
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303114, 303116, 303119, B60T 832, B60T 844
Patent
active
049001019
ABSTRACT:
A brake system with slip control is disclosed including a master cylinder to which wheel brakes are connected through controllable main valves. An auxiliary-pressure supply system including a hydraulic pump, a regulating and pressure-monitoring valve and a pressure-compensating and pressure-fluid supply reservoir is connected to the wheel brakes through electromagnetically actuatable inlet and outlet valves. The outlet valves are normally closed in their inactive condition with each one pair of wheel brakes communicating directly with one inlet valve and one outlet valve. Wheel sensors and an electronic circuitry determine the wheel rotational behavior and generate electric braking-pressure control signals for operating the inlet and outlet valves. The inlet valves are closed in their inactive condition and are switched to open upon actuation and have their inlet side directly connected with the auxiliary-pressure supply system and their outlet side directly connected with the main valves. Accordingly, there is no need for non-return valves in the pressure-fluid supply line leading to the inlet valves.
REFERENCES:
patent: 3771839 (1973-11-01), Fink
patent: 3866983 (1975-02-01), Kondo
patent: 4565411 (1986-01-01), Seiber
patent: 4657315 (1987-04-01), Belart
patent: 4660898 (1987-04-01), Steffes
patent: 4685747 (1987-08-01), Belart et al.
patent: 4687259 (1987-08-01), Reinartz et al.
patent: 4703978 (1987-11-01), Belart et al.
patent: 4708405 (1987-11-01), Belart et al.
patent: 4743075 (1988-05-01), Belart et al.
Becker Horst-Peter
Horne Ruediger
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