Delphi Technologies, Inc.

William L Villaire

John Gardner Fischer

David Howard Burke

Dennis Paul McGrath

Ulf Sawert

Sharon Elizabeth Beyer

Robert A Roth

Mark K Wolfenden

Chris I Witherspoon

Thomas J Mott

Michael Allen Pittenger

Prior art fuel line check valves remain closed after engine off and cool down. Diurnal heating and the resultant pressure increase in the fuel line causes fuel vapor emissions through small openings in the fuel line (e.g., at the injector tips). The invention provides a check valve for a vehicle fuel line which opens in response to engine cooling and remains open while the engine is off to relieve subsequent increasing pressure in the fuel line due to diurnal heating thereof.

Three position fuel line check valve for relief of diurnal pressure

Fuel line check valve system for relief of diurnal pressure

A device and method for venting a tank comprising an intermediate shutoff valve as part of a cover that closes a tank opening. The intermediate shutoff valve is placed between an existing valve and a vent port in a liquid storage tank. The shutoff valve is operable to substantially fluidly seal the vent port when the vent valve is displaced greater than a predetermined amount. The intermediate shutoff valve facilitates complete removal of the existing vent valve during an impact wherein a wall of the storage tank impacts the existing valve. Upon impact, the intermediate shutoff valve is operable to close and seal a tank opening created by the displacement and removal of the existing vent valve.

Fuel tank vent valve

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Clio, MI, United States of America

William L Villaire