Patent ID: 8469858

Claim:
A vehicle comprising: an engine configured to generate an engine torque; a motor configured to generate a motor torque; a dual-clutch transmission having an input member configured to receive at least one of the engine torque and the motor torque, and having a plurality of gears arranged in a first gear set and a second gear set, wherein the transmission includes a first clutch configured to at least partially engage to transfer torque from at least one of the engine and the motor to the gears in the first gear set and wherein the transmission further includes a second clutch configured to at least partially engage to transfer torque from at least one of the engine and the motor to the gears in the second gear set, with the engine and the motor being connected to the same side of the first and second clutches; and a controller configured to control the engine torque and the motor torque to control a speed of the engine to follow a desired speed profile, and wherein the controller is further configured to: calculate an electrical launch k-factor as a function of a stall speed of the motor and a motor torque of the motor at the stall speed; calculate an engine-on launch k-factor as a function of a stall speed of the engine and an engine torque of the engine at the stall speed; select one of the electrical launch or the engine-on launch k-factors; calculate and apply a desired input shaft speed to the input member during a launch of the vehicle as a function of the selected k-factor; and control the engagement of the first clutch and the second clutch to optimize a desired gear state to minimize system losses after the launch of the vehicle.