Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2005-06-14
2005-06-14
Miller, Carl S. (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S456000
Reexamination Certificate
active
06904894
ABSTRACT:
A pulsation reducing system for a fuel line of an internal combustion engine, especially for an automotive engine equipped with an electronic fuel injection system is provided. The system includes a fuel delivery rail, a fuel tank, and a longitudinal main fuel pipe. A first flexible tube is arranged between the fuel delivery rail and the main fuel pipe. A second flexible tube is arranged between the main fuel pipe and the fuel tank. A small-ID tubular portion is arranged within the first tube or near the connecting portion of the first tube. The inside diameter of the small-ID tubular portion is smaller than that of the main fuel pipe. The length of the small-ID tubular portion is set between 10 to 50 times the inside diameter of the small-ID tubular portion itself. Thus, standing waves and resultant pressure pulsations caused by the fuel delivery rail are reduced by the small-ID tubular portion.
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Hayashi Koichi
Ogata Tetsuo
Serizawa Yoshiyuki
Tsuchiya Hikari
Miller Carl S.
Usui Kokusai Sangyo Kaisha Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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