Patent ID: 6708669
Filing Date: 2004-03-23
Classification: B60H,F02D

Abstract:
An engine control apparatus of a vehicle, comprising:an engine; an engine rotation sensor that detects an engine speed; an outside air temperature sensor that detects an outside air temperature; an engine control unit controlling the engine based on a driving state of the vehicle; an air conditioner compressor driven by the engine; an air conditioner condenser that cools a refrigerant pressurized by the air conditioner compressor; a refrigerant pressure sensor that detects a pressure of the refrigerant; and an air conditioner control unit having, a first load torque estimation unit that estimates a first load torque value of the compressor based on an output from the refrigerant pressure sensor, a second load torque estimation unit that estimates a second load torque value of the compressor based on the detected outside air temperature and the detected engine speed, and an estimated load torque selection unit that compares the first load torque value estimated by the first load torque estimation unit with the second load torque value estimated by the second load torque estimation unit to transmit a larger one of the first load torque value and the second load torque value to the engine control means.