| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cylinder injection type spark ignition internal combustion engine enlarging a stable lean combustion operation region by adopting a collision injection method of allowing fuel to collide from mutually facing directions to retain a mixture near an ignition part. Ž<P>SOLUTION: The cylinder injection type spark ignition internal combustion engine is provided with a fuel injection means 11 capable of injecting fuel by an indirect supply method, a direct supply method and a collision injection method of allowing the fuel to collide from the mutually facing directions; operating state detecting means 23, 24 each detecting the operating state of the internal combustion engine; and an ECU 20 switching the indirect supply method, the direct supply method and the collision injection method according to the operating state of the internal combustion engine. By this constitution, the operation region of lean combustion is enlarged by properly using the indirect supply method advantageous to stratified combustion in a low rotation region, the direct supply method advantageous in a region with a small fuel injection quantity in a medium rotation region, and the collision injection method advantageous in a medium load region with a large fuel injection quantity in a lean combustion time. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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