Patent ID: 6181020
Filing Date: 2001-01-30
Classification: B60W,F16H,Y10T

Abstract:
An integrated driving-torque control system for an automotive vehicle with a continuously variable automatic transmission and an electronically-controlled engine whose power output is changeable irrespective of depression of an accelerator pedal, comprising:a desired transmission ratio arithmetic-calculation circuitry calculating a required axle-driveshaft driving torque from a depression amount of the accelerator pedal and a vehicle speed, and retrieving a desired transmission ratio on the basis of the required axle-driveshaft driving torque and the vehicle speed;an automatic shifting control section executing automatic shifting control for the continuously variable automatic transmission so that an actual transmission ratio is adjusted to the desired transmission ratio;a first arithmetic-calculation circuitry calculating a first desired engine output torque corresponding to the required axle-driveshaft driving torque;a second arithmetic-calculation circuitry calculating a second desired engine output torque corresponding to the depression amount of the accelerator pedal;a selector selecting the first desired engine output torque as a desired engine output torque when the vehicle speed is equal to or greater than a predetermined vehicle speed threshold, and selecting the second desired engine output torque as the desired engine output torque when the vehicle speed is less than the predetermined vehicle speed threshold; andan engine power output control section executing engine power output control for the electronically-controlled engine in response to the desired engine output torque selected by said selector.