Vehicle brake system

Details Vehicle brake system Vehicle brake system

1990-05-29

1991-10-01

Herrmann, Allan D.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 8R, F16D 6704

Patent

active

050525328

ABSTRACT:
A brake system for a vehicle includes a pump coupled to a service brake through a brake pedal valve and to a parking brake by a four-way solenoid valve which also couples the pump to a transmission disconnect valve. Activation of the solenoid valve couples the parking brake to the pump for placing the parking brake in an off mode and actuates the transmission disconnect valve to couple a transmission pump to a transmission valve. Deactivation of the solenoid valve disconnects the parking brake and operates the transmission disconnect valve to disconnect the transmission so that the vehicle cannot be driven when the parking brake is on. A check valve connects the parking brake to the brake pedal valve so that the service brake can be operated when the pump is deactivated.

REFERENCES:
patent: 2220620 (1940-11-01), Capen
patent: 3941007 (1976-03-01), Webber et al.
patent: 4227598 (1980-10-01), Luft
patent: 4284182 (1981-08-01), Hakes et al.
Allis-Chalmers Service Manual, Part No. 9005321, Model 8010-8030-8050-8070 Tractors, Aug. 1982.
Mico Brake Actuators brochure.
Bendix Power Brakes for Medium and Medium-Heavy Vehicles, Bendix Automotive Control Systems Group, No., 1985.
Bendix Hydri-Boost Power Brake, Bendix Automotive Control Systems Group, Nov., 1985.

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