| 摘要 |
Air is aspirated into a combustion chamber ( 5 ) of an internal combustion engine ( 1 ) through an intake passage ( 3 ) and an intake valve ( 15 ). Purge gas and externally recirculated exhaust gas are mixed into the air in the intake passage ( 3 ) through a purge gas passage ( 64 ) and an exhaust gas recirculation passage ( 25 ). A controller ( 31 ) estimates temperature variation in the air inside the intake passage ( 3 ) from the inlet to the intake passage ( 3 ) to the point where the purge gas and externally recirculated exhaust gas are mixed into the air (S 2 , S 3 ). The temperature of the gas that is aspirated into the combustion chamber ( 5 ) is estimated accurately on the basis of the mass, specific heat, and estimated temperature of the air, and the mass, specific heat, and temperature of the purge gas and externally recirculated exhaust gas that are mixed into the air (S 4 ).
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