Patent ID: 6243637
Filing Date: 2001-06-05
Classification: B60W,F16D,F16H,Y10T

Abstract:
A control apparatus of an automatic transmission having a torque converter for controlling by oil pressure at least one clutch of the automatic transmission which is connected to an engine output to be engaged or disengaged to perform gear shifting, comprising:engine torque calculating means for calculating an output torque of said engine on a basis of a parameter representing a load of said engine and an engine speed;transfer torque calculating means for calculating a transfer torque necessary for said clutch from parameters associated with at least said calculated engine output torque and engine speed; andcommand value calculating means for determining a command value relative to an oil pressure acted on said clutch on a basis of said calculated transfer torque;wherein said oil pressure command value calculating means, when a change of said engine output torque is indicated, determines said oil pressure command value faster than a change of a ratio between an input and output shaft speed of said torque converter.