Internal-combustion engines – Charge forming device – With fuel pump
Patent
1996-08-08
1998-08-25
Miller, Carl S.
Internal-combustion engines
Charge forming device
With fuel pump
123456, 123198DB, F02M 3704
Patent
active
057973741
ABSTRACT:
A pressure control valve includes a downstream pressure control valve disposed between a fuel pipe and a fuel rail. An opening-closing valve can be integrally formed with the downstream pressure control valve. A relief valve can be disposed to bypass the downstream pressure control valve. The downstream pressure control valve opens or closes the fuel passage leading to the fuel rail so that fuel pressure in the fuel rail is maintained at a predetermined value. When the engine is stopped, the fuel passage is closed to decrease leakage of fuel from the fuel injector. When the fuel pump is again operated, the by-pass relief valve is opened by the pressure of fuel in the fuel pipe. Thus, fuel is supplied from an upstream side to a downstream side and fuel pressure in the fuel rail is increased rapidly for engine re-start.
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Minagawa Kazuji
Oi Kiyotoshi
Miller Carl S.
Nippondenso Co. Ltd.
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