| 摘要 |
PROBLEM TO BE SOLVED: To control a catalyst temperature to be optimum by accurately estimating the catalyst temperature. SOLUTION: This control device comprises a catalyst 32 for purifying exhaust gas from an internal combustion engine, a means for supplying secondary air to an exhaust system for the internal combustion engine, a cylinder pressure sensor 44 for acquiring cylinder pressure, a means for finding energy loss out of a heating value generated in a cylinder due to exhaust gas in accordance with the cylinder pressure, a means for finding the energy of unburnt fuel in the cylinder, a means for estimating the temperature of the catalyst 32 in accordance with the energy loss due to the exhaust gas and the energy of the unburnt fuel, and a control means for controlling the supply of the secondary air in accordance with the catalyst temperature. COPYRIGHT: (C)2004,JPO&NCIPI
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