Borg-warner Automotive Gmbh

Borg-warner Automotive Electronic & Mechanical Systems Corporation

Terry L Forbes

John R Connolly

George H Studtmann

Tibor Baron

James R Ward

Craig A Miller

Dan Stoddard

A solenoid-actuated valve assembly is provided with reduced noise. A rubber retainer and steel retainer secure the valve within a manifold, and the rubber retainer absorbs longitudinal vibrations. A plurality of rubber gaskets surround the body of the valve and prevent metal-to-metal contact between the valve body and the manifold for cushioning lateral vibrations of the valve. The valve is substantially submerged in transmission fluid for airborne noise abatement, and opposing ends of the valve body are provided in communication with a vent port for substantially pressure-balancing the valve body.

Three-way solenoid valve

An improved solenoid valve harness assembly for a vehicle transmission is disclosed that is more reliable, less costly to manufacture, and easier to test. In one embodiment, the solenoid valve assembly includes a plurality of solenoid valves and a harness. The harness includes a plurality of conductors for electrically connecting the plurality of solenoid valves to a controller. The harness is connected to the solenoid valves by a plug and receptacle arrangement that reduces the cost of manufacture and that allows each component to be separately tested prior to being plugged together. In one embodiment, the plug and receptacle arrangement permits the solenoid valves to be disconnected from the harness so that a defective component can be replaced without discarding the entire solenoid valve harness. In a further aspect, a solenoid valve harness is provided in which the solenoid valves are internally grounded thereby eliminating the need for ground wires from the solenoid valves.

Solenoid valve harness

A solenoid valve has a two piece housing which is made from a hollow cylindrical body and a powdered metal cover. The body is projection welded to the cover. The cover has an induction hardened valve seat and a pair of mounting holes to secure the valve in place. A coil assembly is disposed within the hollow cylindrical body and a two piece armature is disposed within an axial bore of the coil assembly. The upper armature is threadably engaged with an end cover for adjustment and a coil spring is located between the upper and lower armatures to bias the lower armature towards the cover. A ball is located between the lower armature and the cover and the coil spring engages the ball with the valve sleeve. When the coil is de-energized, the valve is closed by virtue of the ball being urged against the valve seat by the coil spring. When the coil is energized the lower armature and ball are magnetically attracted to the upper armature permitting flow through the cover, through the body and out a plurality of holes in the body.

Solenoid valve

A balanced valve system, employing either spool or ball valve members can be pulse width modulated using a solenoid actuator. The solenoid actuator is integrally assembled onto the valve and has a rod by which the solenoid armature imparts a valve operating force to the spool or ball valve member. The rod is press fit into the armature during assembly to establish the desired air gap spacing between armature and pole piece. Movement of the armature causes a corresponding movement in the rod which urges the valve member against compression spring forces to the open or unseated position.

Pulse width modulated solenoid valve for variable displacement control

An improved electrically actuated solenoid is used to regulate the function of a hydraulic flow control valve. The solenoid directs a control valve to generate a predetermined output pressure as a function of the solenoid input current. The working air gap surface area is increased by locating it at a greater circumferential radius than the pole piece to increase the air gap permeance, thereby increasing the output force obtainable from a solenoid of relatively small physical dimensions and low cost.

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Dixon, IL, United States of America

Terry L Forbes