Coltec Industries, Inc.

Colt Industries Operating Corporation

Colt Industries Inc.

William J House

Lawrence McAuliffe, Jr

Keith D Marsh

Loren H Kline

Robert J Telep

Michael Dougherty

Jerry A Sowik

A solenoid actuated valve for regulating the fluid pressure at a control port by cyclically connecting the control port alternately to a fluid pressure supply source and to a sump includes a sleeve-like valve member slidably mounted on a fixed valve member for movement between two positions in response to energization or deenergization of the solenoid coil. The valve sleeve is the armature of the solenoid and operates within an internal chamber in the valve housing with pressure within the chamber being at least substantially balanced against its opposite ends. Energization and deenergization of the solenoid coil may be controlled by an electronic processor which supplies a pulse width modulated electric control signal variable in response to processor inputs to establish a control port pressure which is accurately linearly related to the time duration of the pulse width modulated signal.

Solenoid operated pressure control valve

A purge valve for controlling the flow of fuel vapor from a vehicle mounted fuel vapor storage canister to the intake manifold of the vehicle engine utilizes a solenoid actuated three-way valve to control the position of a flexible diaphragm of a flow metering valve to meter flow of fuel vapor at continuously variable rates in response to a solenoid actuating duty cycle signal from an electronic control unit. A diaphragm controlled vacuum regulator connected to the intake manifold maintains a flow chamber in the vacuum regulator at a substantially constant subatmospheric pressure into which the metered flow of fuel vapor is passed from a flow chamber of the metering valve at atmospheric pressure. The metering valve diaphragm shifts to adjust the flow rate in response to variations in the pressure differential between its flow chamber and a control chamber at the opposite side of the diaphragm. The metering valve control chamber is connected to the control port of the three-way duty cycle valve which alternately connects the control port to the flow chamber of the metering valve and to the flow chamber of the regulating valve to controllably vary the control chamber pressure in accordance with the duty cycle signal.

Purge valve

A purge valve for a vehicle mounted fuel vapor recovery system is made up of a main housing and two end caps which snap fit together to seal and mount a computer controlled solenoid valve and a diaphragm controlled regulating valve. The housing is designed so that the required valve seats are integrally molded in the housing as are the various internal passages and chambers. A compression post formed on one end cap seats the solenoid assembly firmly against an abutment surface on the housing.

Purge valve for on board fuel vapor recovery systems

A plurality of interconnected linkages are shown with a resilient clip-like member operatively connected to a first of the linkages and resiliently engaging another of the linkages so as to cause an abutment carried by the first linkage to be held in contact with the other linkage and thereby eliminate rattling noises as would otherwise occur between the first and the other linkage.

Growing community of inventors

Sterling Heights, MI, United States of America

William J House