Fuel supply for international combustion engine

Details Fuel supply for international combustion engine Fuel supply for international combustion engine

1997-09-12

1998-07-28

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

With fuel pump

123511, 123458, F02M 4100, F02M 3704

Patent

active

057850259

ABSTRACT:
In a fuel supply system employing a returnless fuel pipe arrangement, a relief valve is provided at a discharge side of a fuel pump. The relief valve is opened when fuel pressure in the fuel pipe arrangement becomes no less than a system protective pressure, so as to relieve the fuel pressure to protect the system. The relief valve is also arranged to be open when the fuel pressure in the fuel pipe arrangement becomes higher than a target fuel pressure by a predetermined value or when the fuel cut is performed. Thus, the fuel pressure in the fuel pipe arrangement is lowered. Thereafter, when the fuel pressure in the fuel pipe arrangement is lowered to a pressure near the target fuel pressure, the relief valve is arranged to be closed so that the fuel pressure in the fuel pipe arrangement is held substantially at the target fuel pressure.

REFERENCES:
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patent: 5085193 (1992-02-01), Morikawa
patent: 5148792 (1992-09-01), Tuckey
patent: 5195494 (1993-03-01), Tuckey
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patent: 5361742 (1994-11-01), Briggs et al.
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patent: 5379741 (1995-01-01), Matysiewicz et al.
patent: 5398655 (1995-03-01), Tuckey
patent: 5406922 (1995-04-01), Tuckey
patent: 5469829 (1995-11-01), Kleppner et al.
patent: 5546911 (1996-08-01), Iwamoto et al.

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