Concentric solenoid valve and sump assembly

Details Concentric solenoid valve and sump assembly Concentric solenoid valve and sump assembly

1992-04-23

1993-07-13

Graham, Matthew C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

13759617, B60T 836

Patent

active

052267024

ABSTRACT:
The combination solenoid valve and sump assembly comprises a solenoid valve (40, 140, 240, 340, 440) located within a stepped bore (16) of a modulator body (15) of an adaptive braking system (10). The solenoid valve (40, 140, 240, 340, 440) includes a slidable shuttle valve (50) disposed sealingly at an end thereof, and the sump (80, 180, 280, 380, 480) is disposed coaxially relative to the solenoid valve. A movable piston (70) engages sealingly both the solenoid valve (40) and a portion of the stepped bore (16) in a first embodiment, and is biased by a spring (73, 74) located concentrically relative to the windings (41) of the solenoid valve (40). The stepped bore (16) communicates with a pump (14) which, along with a master cylinder (20), provides fluid pressure to appropriate portions of the stepped bore (16). The movable piston (70), solenoid valve (40), and stepped bore (16) define a sump chamber (80) which receives fluid decayed away from a brake connection line (24) communicating with the stepped bore (16), and retains the fluid for communication to the pump (14) of the system (10). Other embodiments provide the movable piston (170, 242, 370, 470) at the rear of the solenoid valve (140, 340) and as a movable housing pole part (242), and located sealingly and slidably about a movable solenoid rod (443) of the solenoid valve (440).

REFERENCES:
patent: 4312380 (1982-01-01), Leiber
patent: 4526203 (1985-07-01), Leiber
patent: 4620565 (1986-11-01), Brown
patent: 4844119 (1989-07-01), Martinic
patent: 4936344 (1990-06-01), Gilbert et al.
patent: 4938545 (1990-07-01), Shuey et al.
patent: 4972873 (1990-11-01), Fulmer et al.
patent: 5005919 (1991-04-01), Shuey et al.

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