Kelsey-hayes Company

James M Cossins

Mark C Pinkowski

Gary A Willi

Paolo Rea

Douglas Lewin

An internal electrical connector includes at least one electrical conductor overmolded by a body formed from an electrically non-conducting material. The connector is received by a bore extending through a valve body for an anti-lock brake system hydraulic control unit. An electronic control unit mounted upon a first surface of the valve body is electrically connected to one end of the connector while the other end of the connector is electrically connected to a pump motor mounted upon a valve body surface opposite from the electronic control unit. The connector is free to move both transversely and axially within the valve body bore to compensate for component tolerance stack up.

Internal electrical connector for a hydraulic control unit

The current through the coil of a solenoid valve is monitored for a deflection which is generated when the valve armature shifts in response to the current being applied to the coil. A lack of detection of the deflection is indicative of a solenoid malfunction and causes generation of an alarm signal.

Solenoid fail-safe using current feedback as a diagnostic input

A portion of a solenoid coil melts after a predetermined time period has elapsed to interrupt the flow of current through the coil. The portion which melts can include a reduced cross sectional area which increases the resistance of the portion of the wire. Alternately, a portion of the coil wire can be formed from a material having a higher resistivity than the remainder of the wire.

Self fusing solenoid coil

A hydraulic brake system metering valve includes an intergal brake switch having at least one pair of contacts. The brake switch contacts are movable between two positions. The combination valve includes a metering valve assembly having an axially shiftable metering rod. One end of the metering rod is adapted to operate the switch contacts. When pressure is initially applied to the brake system the metering rod shifts, causing the brake switch contacts to move from a first to a second position and thereby generate a first electrical signal. Upon release of the brake pressure, the metering rod shifts back, allowing the brake switch contacts to return to the first position and thereby generate a second electrical signal.

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Taylor, MI, United States of America

James M Cossins