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.
申请公布号
US5671716(A)
申请公布日期
1997.09.30
申请号
US19960725045
申请日期
1996.10.03
申请人
FORD GLOBAL TECHNOLOGIES, INC.
发明人
HETRICK, ROBERT EUGENE;HILBERT, HAROLD SEAN;PARSONS, MICHAEL HOWARD;STOCKHAUSEN, WILLIAM FRANCIS