F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
F02M 55/00 (2006.01) F02M 17/04 (2006.01) F02M 25/08 (2006.01) F02M 37/20 (2006.01)
Patent
CA 2474585
A composite control valve is constructed by a valve housing, first and second diaphragms mounted to the valve housing and disposed to be opposed to each other, a negative pressure working chamber defined between the first and second diaphragms to communicate with a negative pressure generating section in an engine, a first control valve adapted to be opened and closed by advancing and returning of the first diaphragm, and a second control valve adapted to be opened and closed by advancing and returning of the second diaphragm. The first control valve is incorporated into an air vent system for a fuel tank, and the second control valve is incorporated into a fuel passage system extending from the fuel tank to a fuel supply section in the engine. Thus, upon stoppage of the operation of the engine, not only the fuel passage system but also the air vent system leading to the upper space in the fuel tank are blocked simultaneously, thereby preventing release of an evaporated fuel generated in the fuel tank to the atmosphere.
Chiba Shosaku
Sasaki Tsutomu
Tsutsui Katsuhiko
Utsugi Eiichi
Yamada Yoshikazu
Honda Motor Co. Ltd.
Smart & Biggar
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