Vehicle powertrain torque limitation based on accelerator pedal and brake pressure

A launch control method for a vehicle having a torque generating system connected to a driveline system via an automatic transmission, the launch control method comprising:

• monitoring, by a control system of the vehicle and using a set of sensors of the vehicle, (i) a position of an accelerator pedal of the vehicle and (ii) a brake pressure commanded by a brake pedal of the vehicle;
• and
• in response to detecting, by the control system, a launch control request:
• determining, by the control system, whether the accelerator pedal position and the brake pressure are greater than respective calibrated thresholds;
• when the accelerator pedal position and the brake pressure are both greater than the respective calibrated thresholds, temporarily limiting, by the control system, a torque output of the torque generating system to a limited calibrated value to mitigate or prevent potential damage to the driveline system, wherein the potential damage to the driveline system is physical damage to (i) a driveshaft or half-shaft of the driveline system or (ii) a differential of the driveline system;
• and
• while temporarily limiting the torque output of the torque generating system to the limited calibrated value, when at least one of the accelerator pedal position and the brake pressure falls below its respective calibrated threshold, increasing, by the control system, the torque output of the torque generating system to a maximum calibrated value.

A launch control method for a vehicle having a torque generating system connected to a driveline system via an automatic transmission, the launch control method comprising:

• monitoring, by a control system of the vehicle and using a set of sensors of the vehicle, (i) a position of an accelerator pedal of the vehicle and (ii) a brake pressure commanded by a brake pedal of the vehicle;
• and
• in response to detecting, by the control system, a launch control request:
• determining, by the control system, whether the accelerator pedal position and the brake pressure are greater than respective calibrated thresholds;
• when the accelerator pedal position and the brake pressure are both greater than the respective calibrated thresholds, temporarily limiting, by the control system, a torque output of the torque generating system to a limited calibrated value to mitigate or prevent potential damage to the driveline system;
• and
• while temporarily limiting the torque output of the torque generating system to the limited calibrated value, when at least one of the accelerator pedal position and the brake pressure falls below its respective calibrated threshold, increasing, by the control system, the torque output of the torque generating system to a maximum calibrated value,
• wherein one of:
• (i) the maximum calibrated value for the torque output of the torque generating system is not based on a speed ratio of a torque converter arranged between the torque generating system and the automatic transmission, and the increasing of the torque output of the torque generating system from the limited calibrated value to the maximum calibrated value is performed in a step manner;
• and
• (ii) the launch control method further comprises, while temporarily limiting the torque output of the torque generating system to the limited calibrated value, increasing, by the control system, the torque output of the torque generating system to the maximum calibrated value when a gradient or rate of change of the brake pressure falls below a respective calibrated threshold.