Patent ID: 6726594
Filing Date: 2004-04-27
Classification: B60W,F16H,Y10T

Abstract:
A control system for a vehicle in which an internal combustion engine whose output torque is controlled based on a required output power is coupled to a continuously variable transmission whose input rotation speed is controlled based on the required output power, comprising a controller that:determines a final target operating point of the internal combustion engine which is defined by the output torque and the input rotation speed, on the basis of the required output power; sets a transient operating point of the engine to one of possible operating points that can be achieved within a predetermined period of time such that the transient operating point is closer to the final target operating point than the current operating point of the engine; and controls the output torque and the input rotation speed of the continuously variable transmission so as to operate the internal combustion engine at the set transient operating point; wherein: the internal combustion engine includes a turbocharger; and the controller sets the transient operating point on the basis of a delay in an increase in a boost pressure of the turbocharger and a delay in a change of a speed ratio of the continuously variable transmission.