| 摘要 |
PROBLEM TO BE SOLVED: To suppress a torque level difference with change-over from spark ignition combustion into compression self-igniting combustion in an internal combustion engine which is operated with change-over between the spark ignition combustion and the compression self-igniting combustion. SOLUTION: When determining a request for change-over from the spark ignition combustion into the compression self-igniting combustion in accordance with an engine operated condition, this control device increases a throttle opening to actualize homogeneous combustion at a leaner air-fuel ratio and intensify the flow of intake air in a cylinder, controls an internal EGR amount to be increased until reaching a limit of stabilizing homogeneous lean combustion, and selects stratified charge lean combustion to accelerate leaner combustion. When compression self-igniting possible conditions are established, the compression self-igniting combustion is started. COPYRIGHT: (C)2007,JPO&INPIT
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