Friction launch control system for vehicle powertrain, has control module determining launch torque trajectory from set of launch torque curves based on throttle position and engine speed to achieve target engine stall speed

摘要

The system has a control module (28) determining a launch torque trajectory from a set of launch torque curves based on a throttle position and an engine speed to achieve a target engine stall speed. The trajectory is determined based on an initial launch torque and a modifier. The module determines a clutch torque based on the launch torque trajectory and regulates engagement of a clutch based on the clutch torque. Independent claims are also included for the following: (1) a method of regulating torque transfer through a clutch during a vehicle launch (2) a method of controlling a vehicle launch.