Patent ID: 6178371
Filing Date: 2001-01-23
Classification: B60K,B60W,F02D

Abstract:
A method for controlling an actual vehicle speed of a vehicle to a desired vehicle speed, the vehicle having an engine with operating parameters that influence an engine torque, the method comprising the steps of:calculating a desired engine torque that would cause the actual vehicle speed to approach the desired vehicle speeddetermining a required airflow that would generate said desired engine torque;determining a minimum allowable airflow which would allow adjustment of the operating parameters to adjust the engine torque without adversely affecting engine performance;controlling airflow to said required airflow when said required airflow is greater than said minimum airflow, thereby providing said desired engine torque; andcontrolling airflow to said minimum airflow and adjusting the operating parameters to provide said desired engine torque when said required airflow is less than said minimum airflow.