Patent ID: 6746368
Filing Date: 2004-06-08
Classification: B60K,B60W,F16H,Y10T

Abstract:
A vehicle speed control system for a vehicle, the vehicle being equipped with an automatic transmission having a torque converter with a lock-up mechanism, the vehicle speed control system comprising:a pre-compensator that calculates a standard command drive torque from a command vehicle speed; a norm model calculating section that calculates a target response of the vehicle speed control system from the command vehicle speed; a feedback compensator that calculates a correction quantity of the standard command drive torque from a deviation between the target response and the vehicle speed; a correcting section that calculates a command drive torque by correcting the standard command drive torque with the correction quantity; a lockup condition detecting section that detects that the automatic transmission is put in an un-lockup condition; and a correction controlling section that decreases the correction quantity when the automatic transmission is put in the un-lockup condition.