Patent ID: 7422546

Claim:
A drive train comprising: an internal combustion engine (ICE) whose output torque is controlled based on a required output power; a continuously variable transmission (CVT), coupled to the ICE and having a rotatable cage configured to rotate about a longitudinal axis of the CVT, wherein an input rotation speed of the CVT is controlled based on the required output power; a controller configured to perform the following steps: determine a final target operating point of the ICE based on output torque and the input rotation speed, on the basis of the required output power; set a transient operating point of the ICE 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 ICE; and control the output torque and the input rotation speed of the CVT to operate the ICE at the set transient operating point.