Fuel injection system and strategy

Details Fuel injection system and strategy Fuel injection system and strategy

1996-10-03

1997-09-30

Nelli, Raymond A.

Chemistry: physical processes

Physical processes

Crystallization

F02M 5100

Patent

active

056717164

ABSTRACT:
A fuel injection system used in the intake air passageway of an internal combustion engine has a strategy for reducing cold start hydrocarbon emissions. The fuel injector has an actuator which allows the fuel spray pattern to be varied from one which is widely dispersed and atomized to one which is only weakly dispersed. A strategy for varying the spray pattern during the engine warm-up period after cold start is disclosed. The strategy increases evaporation within the passageway so that cold start overfuelling and attendant hydrocarbon emissions are reduced.

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