Fuel delivery rail assembly
AssigneeUsui Kokusai Sangyo Kaisha Limited
InventorsHikari Tsuchiya, Yoshiyuki Serizawa, Tetsuo Ogata, Kazuteru Mizuno
Life of this patent
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Abstract
A fuel delivery rail assembly for supplying fuel to a plurality of fuel injectors in an engine is provided. The assembly comprises an elongate conduit having a longitudinal fuel passage therein, a fuel inlet pipe, and a plurality of sockets. One wall of the conduit opposite to the socket mounting wall includes a flat or arcuate flexible absorbing surface. High-frequency noise suppressing means such as a rib, a cavity or a clamp is applied to the one wall opposite to the absorbing surface. Thus, fuel pressure pulsations and shock waves are reduced by bending of the absorbing surface, and emission of high-frequency noise is eliminated.
Claims8
In a fuel delivery rail assembly for an internal combustion engine comprising;
- an elongate conduit having a longitudinal fuel passage therein, a fuel inlet pipe fixed to an end or a side of said conduit, and a plurality of sockets vertically fixed to said conduit adapted to communicate with said fuel passage and so formed as to receive tips of fuel injectors at their open ends, characterized in that:
- one wall of said conduit opposite to the socket mounting wall includes a flat or arcuate flexible absorbing surface,
- a rib is fixed to said one wall across the longitudinal direction of said conduit, whereby;
- a high-frequency noise is suppressed by said rib and fuel pressure pulsations and shock waves are reduced by bending of said absorbing surface.
In a fuel delivery rail assembly for an internal combustion engine comprising;
- an elongate conduit having a longitudinal fuel passage therein, a fuel inlet pipe fixed to an end or a side of said conduit, and a plurality of sockets vertically fixed to said conduit adapted to communicate with said fuel passage and so formed as to receive tips of fuel injectors at their open ends, characterized in that:
- one wall of said conduit opposite to the socket mounting wall includes a flat or arcuate flexible absorbing surface,
- a cavity is formed in said one wall across the longitudinal direction of said conduit, whereby;
- a high-frequency noise is suppressed by said cavity and fuel pressure pulsations and shock waves are reduced by bending of said absorbing surface.
In a fuel delivery rail assembly for an internal combustion engine comprising;
- an elongate conduit having a longitudinal fuel passage therein, a fuel inlet pipe fixed to an end or a side of said conduit, and a plurality of sockets vertically fixed to said conduit adapted to communicate with said fuel passage and so formed as to receive tips of fuel injectors at their open ends, characterized in that:
- one wall of said conduit opposite to the socket mounting wall includes a flat or arcuate flexible absorbing surface,
- a clamp is located for holding the socket mounting wall and said absorbing surface between the clamp, whereby;
- a high-frequency noise is suppressed by said clamp and fuel pressure pulsations and shock waves are reduced by bending of said absorbing surface.
Dependencies are inferred from the claim text.