Fuel injection system for internal combustion engine

Details Fuel injection system for internal combustion engine Fuel injection system for internal combustion engine

1993-12-14

1995-01-31

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Auxiliary air or oxygen added to combustible mixture

123531, F02M 6900

Patent

active

053851331

ABSTRACT:
A fuel injection system for a multi-cylinder internal combustion engine is provided. This fuel injection system includes a plurality of fuel injection valves each arranged to inject fuel into an intake port of each cylinder of the engine, an air passage connected to a portion of an air intake passage leading to the intake ports, a plurality of branch air passages each communicating with a preselected portion around an injection nozzle of each fuel injection valve, an air control valve, connecting between the air passage and the plurality of branch air passages, for selectively introducing a portion of intake air in the air intake passage to the preselected portions around the injection nozzles of the fuel injection valves. The air control valve is arranged to selectively assume first and second valve positions, the first valve position being to establish communications between the air passage and the branch air passages in sequence according to rotation of the engine, the second valve position being to establish communication between the air passage and all the branch air passages to supply the intake air in the air passage uniformly to all the branch air passages when an opening period of time during which one of the fuel injection valves is open partly overlaps with that of another fuel injection valve.

REFERENCES:
patent: 4475505 (1984-10-01), Hasegawa et al.
patent: 5086667 (1992-02-01), Katayama et al.
patent: 5148788 (1992-09-01), Saikalis et al.
patent: 5170761 (1992-12-01), Kato et al.
patent: 5211148 (1993-05-01), Furuya et al.
patent: 5255658 (1993-10-01), Hoffer et al.

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