| 摘要 |
PURPOSE:To prevent deterioration of the driving performance and the specific fuel consumption of an engine, by executing learning control when an intake throttle valve and the engine load are feedback-controlled under specific conditions and the temperature of intake air is whithin a prescribed range. CONSTITUTION:A control circuit 61 executes learning of values to be learnt when an intake throttle valve and the engine load are feedback controlled under specific conditions. For this purpose, judgement is made at first that the intake throttle valve is not in its idling position and then judgement is made whether the pressure PM in an intake pipe has entered into learning region or not. In case that the judgement is YES, learning of values to be learnt is executed when the air-fuel ratio is under feedback control, the temperature THW of engine cooling water becomes higher than a prescribed value, the temperature of intake air is within a prescribed range and skipping of an air-fuel ratio feedback correction factor FAF is caused. By employing such a method, it is enabled to reduce the number of bits of memory and the number of words of a program and to prevent deterioration of the driving performance and the specific fuel consumption of an engine due to errors of learnt values. |
