Fuel supply apparatus for internal combustion engine

Details Fuel supply apparatus for internal combustion engine Fuel supply apparatus for internal combustion engine

1996-05-28

1997-07-29

Miller, Carl S.

Internal-combustion engines

Charge forming device

With fuel pump

123516, 12317917, F02M 3704

Patent

active

056513470

ABSTRACT:
According to the present invention, a fuel supply apparatus includes a fuel pump, a delivery pipe to distribute the fuel to each injector of the engine by receiving fuel supply by the fuel pump, a pressure sensor to detect the fuel pressure supplied to the delivery pipe, and a check valve disposed in the fuel discharge pipe of the fuel pump to prevent counterflow of the fuel from the delivery pipe. The amount of fuel discharged from the fuel pump is controlled to maintain the fuel pressure in the delivery pipe at a set value during fuel injection. At the stop of the engine, the amount of fuel discharged from the fuel pump is substantially reduced to zero, and the pressure of the fuel from the fuel pump is gradually reduced. After the pressure of the fuel discharged from the fuel pump reaches a predetermined value, the fuel pump stops. In this way the internal pressure of the delivery pipe is prevented from excessively rising without exterior parts such as a relief valve disposed outside of the fuel pump.

REFERENCES:
patent: 3742256 (1973-06-01), Frederiksen
patent: 5148792 (1992-09-01), Tuckey
patent: 5263459 (1993-11-01), Talaski
patent: 5293299 (1994-03-01), Iwabuchi
patent: 5327872 (1994-07-01), Morikawa
patent: 5398655 (1995-03-01), Tuckey
patent: 5425342 (1995-06-01), Ariga
patent: 5477829 (1995-12-01), Hassinger
patent: 5582510 (1996-12-01), Dobler

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