Purge valve

Details Purge valve Purge valve

1991-10-17

1992-06-02

Cross, E. Rollins

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123519, 251 3001, 137907, F02M 3302

Patent

active

051177978

ABSTRACT:
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.

REFERENCES:
patent: 4059081 (1977-11-01), Kayanuma
patent: 4180234 (1979-12-01), Hertfeider
patent: 4194526 (1980-03-01), Stromberg
patent: 4308841 (1982-01-01), Kingsley
patent: 4503887 (1985-03-01), Johnson et al.
patent: 4524906 (1985-07-01), Kenyon et al.
patent: 4534375 (1985-08-01), Fox
patent: 4535805 (1985-08-01), Mertz
patent: 4628887 (1986-12-01), Mitchell et al.
patent: 4708316 (1987-11-01), Cook
patent: 4727899 (1988-03-01), Massey et al.
patent: 4741317 (1988-05-01), Yost
patent: 4809667 (1989-03-01), Uranishi et al.
patent: 4944276 (1990-07-01), House et al.
patent: 4951637 (1990-08-01), Cook
patent: 4953514 (1990-09-01), Beicht et al.
patent: 5054455 (1991-10-01), Cook

Affiliated with

Also associated with

Rating

Purge valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Purge valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Purge valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2222515