| 摘要 |
A control system for a compression ignition internal combustion engine, which is capable of properly estimating the temperature of combustion gases, and thereby accurately controlling the temperature of working medium according to the estimated temperature of the combustion gases, to thereby prevent knocking and misfire from occurring. A compression ignition internal combustion engine causes combustion of an air-fuel mixture by self-ignition in a combustion chamber, and includes an EGR device that causes part of combustion gases generated by the combustion to exist as EGR gases in the combustion chamber. The control system estimates the amount of EGR gases existing in the combustion chamber, estimates the temperature of combustion gases generated by combustion of working medium including the air-fuel mixture and the EGR gases, according to the estimated amount of the EGR gases, and determines the amount of the EGR gases which should be caused to exist in the combustion chamber, according to the estimated temperature of the combustion gases.
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