Electrically controlled brake actuator

Details Electrically controlled brake actuator Electrically controlled brake actuator

1989-06-22

1991-03-19

Halvosa, George E. A.

Brakes

Wheel

Axially movable brake element or housing therefor

188 724, 188106P, 192 83, 303 10, F16D 6520

Patent

active

050002953

ABSTRACT:
The actuator (10) of a brake, such as a disc brake, is controlled by an electric motor (34) which drives a pump (38, 50, 62) ensuring that the pressure of the brake fluid in a control chamber (44) rises. A crankshaft (38) driven by the electric motor (34) imparts a to-and-fro movement to a plunger piston (50) in a pumping chamber (62). This chamber (62) communicates with a brake-fluid reservoir via an intake duct (74) controlled by way of a valve (76, 78) and with the chamber (44) via a delivery duct controlled by way of a valve (58, 60). Furthermore, the control chamber (44) communicates with the reservoir via a recycling duct (80) controlled by way of a solenoid valve (82). The entire hydraulic circuit so formed is accommodated in the body (12) of the actuator.

REFERENCES:
patent: 3804212 (1974-04-01), Haraikawa
patent: 4278300 (1981-07-01), Bacher
patent: 4387934 (1983-06-01), Farr
patent: 4435021 (1984-03-01), Hoenick
patent: 4462642 (1984-07-01), Leiber
patent: 4556260 (1985-12-01), Maehara

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