| 摘要 |
PROBLEM TO BE SOLVED: To suppress an increase of combustion noise and enhance NVH performance, in a control device for a compression self-ignition engine. SOLUTION: An injection controller (PCM10), when the engine body 1 is in an operation range of a partial load, effects a diffusion combustion mode to execute main injection to start fuel injection at a compression top dead center or before it for performing main combustion mainly composed of diffusion combustion, and a pre-stage injection to perform fuel injection at least once with timing before the compression top dead center so that a peak of pre-stage combustion occurs before the compression top dead center (see (3), (4)). Further, the injection controller, when the peak of pre-stage combustion occurs at the compression top dead center or behind it due to that a state in the cylinder is turned into a state where ignition delay time is extended, effects a premix combustion mode to perform fuel injection more than once before the compression top dead center and to cause ignition and combustion near the compression top dead center (see (1)). COPYRIGHT: (C)2012,JPO&INPIT |
