Cushman Darby & Cushman IP Group of Pillsbury Madison & Sutro LLP
Fuel discharge preventive device of gas engine
 In a fuel discharge preventive device of a gas engine, in order to prevent high-pressure gaseous fuel remaining in a fuel distributing pipe when an engine is stopped, from leaking out of a gaseous fuel injection valve to be discharged to the open air, a fuel shut-off valve is provided in a fuel feed passage through which gaseous fuel is fed to the gaseous fuel injection valve, and a suction passage communicating with a gaseous fuel storing portion is branched off from the fuel feed passage between the gaseous fuel injection valve and the fuel shut-off valve, so that the gaseous fuel in a potion of the fuel feed passage located between the gaseous fuel injection valve and the fuel shut-off valve is stored in the gaseous fuel storing portion after the engine is stopped and hence the fuel shut-off valve is closed, while the stored fuel is purged to the engine when the engine is being operated. 
Toyota Jidosha Kabushiki Kaisha Aisan Kogyo Kabushiki Kaisha
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Kichiro Kazusato Masahiko Toru Kazuhiro
Kato Kasuya Masubuchi Sato Yoneshige