Patent ID: 6687591
Filing Date: 2004-02-03
Classification: B60W,Y10T

Abstract:
A control apparatus provided to have a control communication with an internal combustion engine and an automatic transmission, and including a torque-down control unit for implementing a torque-down controlling of the internal combustion engine upon gear changing of the automatic transmission by cutting down a part of the present engine torque at a predetermined demand for a torque-down rate, wherein the torque-down control unit:converts the predetermined demand for a torque-down rate into a down rate of combustion torque as a sum of engine torque and friction torque; converts the down rate of combustion torque into a counter MBT down rate that is a down rate against a combustion torque at an ignition timing for a Minimum Advance for Best Torque (MBT ignition timing); and calculates an amount of retard of ignition timing from the MBT ignition timing on the basis of the counter MBT down rate, for implementing the torque-down controlling of the engine.