Brake apparatus of a motor vehicle equipped with automatic trans

Details Brake apparatus of a motor vehicle equipped with automatic trans Brake apparatus of a motor vehicle equipped with automatic trans

1996-09-04

1998-03-03

Young, Lee W.

Brakes

Operators

Fluid pressure

192 4A, 303 89, B60T 1716, B60T 1100, B60K 4126

Patent

active

057225176

ABSTRACT:
A brake apparatus of a motor vehicle equipped with an automatic transmission includes a brake circuit for applying a fluid pressure to wheel brakes to allow the wheel brakes to generate braking forces. The hydraulic pressure is generated by fluid pressure generating means according to an operated state of a brake pedal. The brake apparatus further includes a shift operating unit having a selector member that is placed in a selected shift position including a parking position for establishing a selected shift position of the automatic transmission. A control valve is disposed between the fluid pressure generating means and the wheel brakes in the brake circuit, such that the control valve is selectively placed in a first state wherein the wheel brakes communicate with the fluid pressure generating means, and a second state wherein the wheel brakes are disconnected from the fluid pressure generating means. The control valve is placed in the second state when the selector member is moved into the parking position, and placed in the first state when the selector member is moved into a shift position other than the parking position.

REFERENCES:
patent: 2864469 (1958-12-01), Schluurbrecht
patent: 3299999 (1967-01-01), Martiu
patent: 3565220 (1971-02-01), Lammers
patent: 3735834 (1973-05-01), St. Onge
patent: 3973805 (1976-08-01), Stevenson et al.
patent: 4246989 (1981-01-01), Kohler
patent: 4454936 (1984-06-01), Wise
patent: 4462487 (1984-07-01), Warwick et al.
patent: 4519653 (1985-05-01), Smith
patent: 4884668 (1989-12-01), Kobayashi et al.
patent: 5570756 (1996-11-01), Hatcher

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