| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device avoiding generation of excessive combustion noise by injecting liquid at a time of switching operation form spark ignition operation to self ignition operation and avoiding premature ignition or slowing down combustion with heat of vaporization of injected liquid (water). SOLUTION: This control device is applied to an internal combustion engine performing spark ignition operation in a part of operation domain and performing premixed compression ignition operation in other operation domain. The control device injects liquid from a liquid injection valve 42 provided on an intake manifold 41 at predetermined timing during a period from completion of spark ignition combustion right before operation switching to a moment of a start of suction of air contained in mixed gas provided for the first self ignition combustion right after operation switching to a combustion chamber 24 when operation is switched from spark ignition operation to premixed compression ignition combustion. COPYRIGHT: (C)2006,JPO&NCIPI
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