| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device for a variable cylinder internal combustion engine surely preventing engine stall even if misfire occurs in an operating cylinder during reduced cylinder operation. SOLUTION: During reduced cylinder operation under which part of cylinders is operated, rest of cylinders are stopped without opening intake valves and exhaust valves. At a time of start of reduced cylinder operation, air fuel mixture is formed in the rest of the cylinders but ignition is not performed to stop the rest of the cylinders without opening the exhaust valve (step 102, 103, 104, 105). When drop of engine speed of an established value or more occurs or drop of engine speed of the established value or more is anticipated during reduced operation (step 106), ignition is performed in the stopping cylinder of which ignition timing is right after that and operation is started (step 107, 108, 109). COPYRIGHT: (C)2006,JPO&NCIPI
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