Internal combustion engine and method for auto-ignition operation of said engine
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United States of America Patent
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Mar 27, 2007
Grant Date -
Aug 10, 2006
app pub date -
Jan 13, 2006
filing date -
Jan 13, 2005
priority date (Note) -
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Abstract
The invention relates to an internal combustion engine that can be operated in compression ignition mode, the engine comprising a fuel injector for each cylinder; a fuel injection controller for controlling fuel injection quantity and a piston in each cylinder whose compression action causes a mixture of air and fuel to be ignited. The engine is further provided with inlet and outlet valves and sensors for measuring various engine operating parameters. During compression ignition mode, the control unit controls the fuel injector to perform a first fuel injection before top dead center of the exhaust stroke during a period of negative valve overlap, and a second fuel injection during the piston compression stroke. The control unit may perform a switch between a first fuel injection strategy and at least one further fuel injection strategy in response to a change in load demand on the engine.
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