Isolation valve bypass for master cylinder brake fluid in wheel

Details Isolation valve bypass for master cylinder brake fluid in wheel Isolation valve bypass for master cylinder brake fluid in wheel

1987-12-28

1989-08-22

Kashnikow, Andres

Fluid-pressure and analogous brake systems

Pipeless valves

303115, B60T 888, B60T 842

Patent

active

048590010

ABSTRACT:
A vehicle wheel brake system having a service braking section and a wheel lock control (ABS) section is provided. Under certain conditions the wheel lock control section may not be able to generate sufficient pressure to operate the vehicle wheel brakes when the master cylinder output pressure has been isolated from the wheel brakes. When such conditions occur, the displacement piston of the ABS control section moves to open a bypass valve which connects master cylinder output pressure to the vehicle wheel brake even though the ABS system has isolated it from that wheel brake. The opening of the bypass valve effectively returns the vehicle braking system to service braking until the vehicle operator releases the brake system.

REFERENCES:
patent: 3923344 (1975-12-01), Sekigawa et al.
patent: 3934941 (1976-01-01), Holmes
patent: 4478461 (1984-10-01), Leiber
patent: 4685749 (1987-08-01), Otsuki et al.

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