Canister vent valve having electric pressure sensor and valve ac

Details Canister vent valve having electric pressure sensor and valve ac Canister vent valve having electric pressure sensor and valve ac

1997-02-12

1998-09-08

Miller, Carl S.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123458, 123494, 1374875, F02M 3704

Patent

active

058030565

ABSTRACT:
A vapor collection canister vent valve contains both an electric pressure sensor for measuring evaporative emission space pressure during a diagnostic test and an electric actuator for operating the vent valve closed during a diagnostic test. Use of the valve in an evaporative emission control system reduces the number of connections, both electrical and fluid, that are required to install the valve in a system. The remote location of the pressure sensor damps the effect of pressure transients, such as those due to tank fuel slosh, on the sensor.

REFERENCES:
patent: 4763681 (1988-08-01), Cuny
patent: 4768548 (1988-09-01), Maurer
patent: 4915349 (1990-04-01), Inoue
patent: 5038821 (1991-08-01), Maget
patent: 5245975 (1993-09-01), Ito
patent: 5383437 (1995-01-01), Cook
patent: 5388607 (1995-02-01), Ramaker
patent: 5411004 (1995-05-01), Busato
patent: 5437257 (1995-08-01), Giacomazzi
patent: 5509395 (1996-04-01), Cook
patent: 5635630 (1997-06-01), Dawson

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