Alliedsignal Inc.

Michael G Pickett

Arthur K Brown, Jr

Richard T Hendrickson

Michael E Gatt

Thanh Ho

The combination solenoid valve and shuttle valve (60) with self-cleaning orifice (92) comprises a shuttle valve (50) which is slidingly and sealingly received at an end (40D) of the solenoid valve (40). The shuttle valve (50) includes a stepped interior opening (54) which includes an insert (55) providing a shuttle valve seat (91) opposite a self-aligning solenoid valve seat assembly (94) of the solenoid valve (40). The valve seat (91) of the shuttle valve (50) includes an orifice (92) which extends from an end opening (70) of the insert and communicates with an insert passage (63) at an outer radial portion of the insert (55). An opposite radial side of the insert (55) includes a port (67) which communicates with a longitudinal passage (66) of the insert (55). Disposed within the longitudinal passage (66) is a brake-master cylinder check valve (59), and a stabilization check valve (58) adjacent a filter element (80) which permits communication with the insert passage (63). The shuttle valve (50) includes an end passage (64) having a pump check valve (57) and which communicates with an interior cavity (65) of the insert member (55). Fluid pressure from a pump mechanism (18) causes the shuttle valve (50) to be displaced and engage the shuttle valve seat (91) with the self-aligning valve seat assembly (94) so that fluid pressure from the pump mechanism (18) passes around the pump check valve (57), through the filter element (80) and insert passage (63), and out both ends of the orifice (92) for transmission to a second bore section (72) and a wheel brake (16) and to a first bore section (71) and a pressure producing device such as a master cylinder (12).

Combination solenoid valve and shuttle valve with self-cleaning orifice

An adaptive braking system (10, 210) for an automotive vehicle provides a three-channel split pump-back system which may be utilized with either two- or three-chamber master cylinders. The three-channel adaptive braking system (10, 210) includes a first braking circuit (40) for controlling one of the front wheel brakes (25), a second braking circuit (60) for controlling the other of the front wheel brakes (27), and a third braking circuit (80) for controlling the rear wheel brakes (24). A two-section pump (110) provides hydraulic pressure for the first and second braking circuits (40, 60) and for the third braking circuit (80). Alternatively, a three-section pump (310) can provide hydraulic pressure for each of the circuits (40, 60, 80).

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South Bend, IN, United States of America

Michael G Pickett