Estimation of intake gas temperature in internal combustion engine
First Claim
1. 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:
- estimate a mass, a temperature, and a specific heat of air that is aspirated into the combustion chamber;
estimate a mass, a temperature, and a specific heat of a gas other than air that is aspirated into the combustion chamber; and
estimate the temperature of the intake gas that is aspirated into the combustion chamber on the basis of the mass, temperature, and specific heat of the air and the mass, temperature, and specific heat of the gas other than air.
1 Assignment
0 Petitions
Accused Products
Abstract
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).
35 Citations
11 Claims
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1. 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:
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estimate a mass, a temperature, and a specific heat of air that is aspirated into the combustion chamber; estimate a mass, a temperature, and a specific heat of a gas other than air that is aspirated into the combustion chamber; and estimate the temperature of the intake gas that is aspirated into the combustion chamber on the basis of the mass, temperature, and specific heat of the air and the mass, temperature, and specific heat of the gas other than air. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An estimation device which estimates a temperature of an intake gas that is aspirated into a combustion chamber of an internal combustion engine, comprising:
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means for estimating a mass, a temperature, and a specific heat of air that is aspirated into the combustion chamber; means for estimating a mass, a temperature, and a specific heat of a gas other than air that is aspirated into the combustion chamber; and means for estimating the temperature of the intake gas that is aspirated into the combustion chamber on the basis of the mass, temperature, and specific heat of the air and the mass, temperature, and specific heat of the gas other than air.
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11. 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:
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estimating a mass, a temperature, and a specific heat of air that is aspirated into the combustion chamber; estimating a mass, a temperature, and a specific heat of a gas other than air that is aspirated into the combustion chamber; and estimating the temperature of the intake gas that is aspirated into the combustion chamber on the basis of the mass, temperature, and specific heat of the air and the mass, temperature, and specific heat of the gas than air.
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Specification