Vehicle and vehicle launch method

Abstract

A vehicle includes a transmission, friction brakes, and a controller. The transmission has a clutch that is configured to transfer torque from an input of the transmission to a drive wheel. The controller is programmed to, in response to application of the friction brakes resulting in a stationary position of the vehicle, disengage the clutch to establish a neutral condition of the transmission. The controller is also programmed to, in response to a command to launch the vehicle while the transmission is in the neutral condition, engage the clutch. The controller is further programmed to, in response to an estimated wheel torque exceeding a rollback threshold during the clutch engagement, release the friction brakes. The wheel torque is based on an estimated clutch torque which is based on a clutch pressure and a transmission input torque.

Dependencies are inferred from the claim text.