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US 6,980,902 B2Granted
Estimation of intake gas temperature in internal combustion engine
AssigneeNissan Motor Co., Ltd.
InventorTakashi Nakazawa
Life of this patent
Estimating the term…
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AssigneeNissan Motor Co., Ltd.
InventorTakashi Nakazawa
Estimating the term…
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 (S2, S3). 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 (S4).
A programmable estimation device which estimates a temperature of an intake gas that is aspirated into a combustion chamber of an internal combustion engine, programmed to:
An estimation device which estimates a temperature of an intake gas that is aspirated into a combustion chamber of an internal combustion engine, comprising:
A programmable estimation method which estimates a temperature of an intake gas that is aspirated into a combustion chamber of an internal combustion engine, comprising:
Dependencies are inferred from the claim text.