Driver-selectable vehicle launch torque curves and open-loop engine torque control
A launch control technique for a vehicle having a torque generating system comprises displaying, via a user interface, information relating to a set of launch torque curves, each launch torque curve defining how the torque generating system is to generate drive torque during a period, receiving, via the user interface, a driver-selection of one of the set of launch torque curves to obtain a driver-selected launch torque curve, detecting a set of launch conditions comprising one or more vehicle operating conditions indicative of a launch of the vehicle, detecting a launch request in response to an accelerator pedal of the vehicle being depressed, and controlling the launch of the vehicle by performing open-loop control of the drive torque generated by the torque generating system according to the driver-selected launch torque curve and irrespective of wheel slip of the vehicle.
1. A launch control system for a vehicle having a torque generating system, the launch control system comprising:
a user interface configured to:
display information relating to a set of launch torque curves, each launch torque curve defining how the torque generating system is to generate drive torque during a finite vehicle launch period defined from a vehicle stop until the vehicle reaches a threshold speed or a vehicle launch timer expires; and
receive a driver-selection of one of the set of launch torque curves to obtain a driver-selected launch torque curve; and
a controller configured to:
detect a set of launch conditions comprising one or more vehicle operating conditions indicative of a launch of the vehicle;
detect a launch request in response to an accelerator pedal of the vehicle being depressed to an accelerator pedal position threshold; and
after receiving the driver-selected launch torque curve and in response to detecting the set of launch conditions and the launch request, control the launch of the vehicle by performing open-loop control of the drive torque generated by the torque generating system according to the driver-selected launch torque curve and irrespective of wheel slip of the vehicle for a duration of the finite vehicle launch period.
2. The launch control system of claim 1 , wherein the controller is configured to perform the open-loop control of the drive torque generated by the torque generating system according to the driver-selected launch torque curve and irrespective of any feedback relative to a driveline of the vehicle.
3. The launch control system of claim 1 , wherein the controller is configured to perform the open-loop control of the drive torque generated by the torque generating system according to the driver-selected launch torque curve and without any driver modulation of the accelerator pedal.
4. The launch control system of claim 1 , wherein the set of driver-selectable launch torque curves comprises a plurality of predetermined launch torque curves.
5. The launch control system of claim 1 , wherein the set of driver-selectable launch torque curves comprises at least one driver-generated or driver-modified launch torque curve.
6. The launch control system of claim 1 , wherein the set of launch conditions comprises a speed of the vehicle being less than a threshold and a brake pedal of the vehicle being depressed to a first brake pedal position threshold or a clutch pedal of the vehicle being depressed to a clutch pedal position threshold.
7. The launch control system of claim 6 , wherein the launch request further comprises the brake pedal being released to a second brake pedal position threshold.
8. The launch control system of claim 1 , wherein the set of launch conditions comprises a speed of the vehicle being less than a threshold and a transmission braking feature of a transmission of the vehicle being active.
9. The launch control system of claim 1 , wherein the user interface is a touch display of an infotainment system of the vehicle.
10. The launch control system of claim 1 , wherein the user interface is further configured to receive a driver-modification to one of the set of launch torque curves to obtain a different driver-modified launch torque curve, and wherein the driver-selected launch torque curve is the driver-modified launch torque curve.
11. A launch control method for a vehicle having a torque generating system, the launch control method comprising:
commanding, by a controller of the vehicle, a user interface of the vehicle to display information relating to a set of launch torque curves, each launch torque curve defining how the torque generating system is to generate drive torque during a finite vehicle launch period defined from a vehicle stop until the vehicle reaches a threshold speed or a vehicle launch timer expires;
receiving, by the controller and via the user interface, a driver-selection of one of the set of launch torque curves to obtain a driver-selected launch torque curve;
detecting, by the controller, a set of launch conditions comprising one or more vehicle operating conditions indicative of a launch of the vehicle;
detecting, by the controller, a launch request in response to an accelerator pedal of the vehicle being depressed to an accelerator pedal position threshold; and
after receiving the driver-selected launch torque curve and in response to detecting the set of launch conditions and the launch request, controlling, by the controller, the launch of the vehicle by performing open-loop control of the drive torque generated by the torque generating system according to the driver-selected launch torque curve and irrespective of wheel slip of the vehicle for a duration of the finite vehicle launch period.
12. The launch control method of claim 11 , wherein the performing of the open-loop control of the drive torque generated by the torque generating system according to the driver-selected launch torque curve is irrespective of any feedback relative to a driveline of the vehicle.
13. The launch control method of claim 11 , wherein the performing of the open-loop control of the drive torque generated by the torque generating system according to the driver-selected launch torque curve is without any driver modulation of the accelerator pedal.
14. The launch control method of claim 11 , wherein the set of driver-selectable launch torque curves comprises a plurality of predetermined launch torque curves.
15. The launch control method of claim 11 , wherein the set of driver-selectable launch torque curves comprises at least one driver-generated or driver-modified launch torque curve.
16. The launch control method of claim 11 , wherein the set of launch conditions comprises a speed of the vehicle being less than a threshold and a brake pedal of the vehicle being depressed to a first brake pedal position threshold or a clutch pedal being depressed to a clutch pedal position threshold.
17. The launch control method of claim 16 , wherein the launch request further comprises the brake pedal being released to a second brake pedal position threshold.
18. The launch control method of claim 11 , wherein the set of launch conditions comprises a speed of the vehicle being less than a threshold and a transmission braking feature of a transmission of the vehicle being active.
19. The launch control method of claim 11 , wherein the user interface is a touch display of an infotainment system of the vehicle.
20. The launch control method of claim 11 , wherein the user interface is further configured to receive a driver-modification to one of the set of launch torque curves to obtain a different driver-modified launch torque curve, and wherein the driver-selected launch torque curve is the driver-modified launch torque curve.