| 摘要 |
An exhaust temperature control method of an automotive engine is provided to improve fuel ratio of a vehicle by controlling exhaust gas temperature in consideration of car speed, the load of an engine and revolution per minute. An exhaust temperature control method of an automotive engine comprises: a step that calculates exhaust gas temperature modeling value and updates in order to know present exhaust gas temperature; a step that determines whether the updated exhaust gas temperature is over exhaust system allowable temperature or not; a step that sets up operation temperature of a COP(Catalyst Overheating Protection) function according to current car speed, load and revolution per minute(RPM) in case the exhaust gas temperature is over the exhaust system allowable temperature; and a step that feedback-controls to operate the COP function so that the exhaust gas temperature becomes the COP function operating temperature in case the exhaust gas temperature is over the COP function operating temperature.
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