| 摘要 |
PROBLEM TO BE SOLVED: To provide an operation area control device of an internal combustion engine, capable of improving fuel consumption, and capable of reducing a generation quantity of NOx, by expanding a compression ignition operation area, so as to vary the compression ignition operation area in response to atmospheric pressure. SOLUTION: This internal combustion engine can perform both spark ignition operation and compression ignition operation, and has an atmospheric pressure detecting means 29 for detecting the atmospheric pressure, an operation state detecting means for detecting an operation state provided for determining the compression ignition operation area, a limit value deriving means for deriving a compression ignition operation limit value of the operation state corresponding to the atmospheric pressure detected by the atmospheric pressure detecting means 29, an operation area determining means for determining whether or not to be in the compression ignition operation area, by comparing the compression ignition operation limit value derived by the limit value deriving means with the operation state detected by the operation state detecting means, and an operation area setting mean for setting the internal combustion engine in compression ignition operation, when the operation area determining means determines to be in the compression ignition operation area. COPYRIGHT: (C)2005,JPO&NCIPI
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