Fluid-pressure and analogous brake systems – Multiple control – Fluid and electric
Patent
1990-03-26
1991-07-16
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Multiple control
Fluid and electric
60545, 60582, 188345, 188359, 303 50, 303100, 303101, 303110, 303119, B60T 700, B60T 1370, B60T 1514
Patent
active
050319680
ABSTRACT:
An electronically controlled brake device for controlling a brake pressure according to a manual input. While the dynamic pressure line is functioning normally, the dynamic pressure acts on one end of a push rod associated with a brake pedal to give such a force as to counteract the control input to the brake pedal. If the dynamic pressure line fails, the push rod comes into contact with a dynamic pressure piston to transmit the control input force to a master cylinder. An electronic pressure control valve is provided to adjust the connection of the dynamic pressure source with a reservoir and with a dynamic pressure chamber in response to the commands of an electronic control unit so that its output pressure will be in a predetermined relationship with the pedal stroke. Thus in normal conditions, a desired deceleration is obtained with a shorter pedal stroke and in the failure of dynamic pressure, a minimum deceleration is obtained with a lighter pedal force.
REFERENCES:
patent: 3790225 (1974-02-01), Wehde
patent: 4131325 (1978-12-01), Bayliss
patent: 4327414 (1982-04-01), Klein
patent: 4435021 (1984-03-01), Hoenick
patent: 4576417 (1986-03-01), Dobner
patent: 4603918 (1986-08-01), Leiber et al.
patent: 4610484 (1986-09-01), Amberg et al.
patent: 4818038 (1989-04-01), Ocvirk et al.
patent: 4826255 (1989-05-01), Volz
patent: 4940291 (1990-07-01), Sato
patent: 4950028 (1990-08-01), Harrison
Butler Douglas C.
Sumitomo Electric Industries Ltd.
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