US 12,455,007 B2
Method for controlling a powertrain of a vehicle having a dual-clutch transmission
Alexander Tausch, Innerschwand (AT); Robert Ebner, Edt bei Lambach (AT); and Verena Wolfsegger, Roitham am Traunfall (AT)
Assigned to BRP-ROTAX GMBH & CO. KG, Gunskirchen (AT)
Filed by BRP-ROTAX GMBH & CO. KG, Gunskirchen (AT)
Filed on Feb. 5, 2025, as Appl. No. 19/045,938.
Application 19/045,938 is a continuation of application No. 18/506,224, filed on Nov. 10, 2023, granted, now 12,253,165.
Application 18/506,224 is a continuation of application No. 18/162,087, filed on Jan. 31, 2023, granted, now 11,873,895, issued on Jan. 16, 2024.
Claims priority of provisional application 63/304,909, filed on Jan. 31, 2022.
Prior Publication US 2025/0180114 A1, Jun. 5, 2025
Int. Cl. F16H 61/688 (2006.01); F16H 3/00 (2006.01); F16H 61/04 (2006.01)
CPC F16H 61/688 (2013.01) [F16H 3/006 (2013.01); F16H 61/0403 (2013.01); F16H 2306/24 (2013.01); F16H 2306/48 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for accelerating a vehicle from rest, the vehicle having a powertrain comprising:
an internal combustion engine; and
a dual-clutch transmission operatively connected to the engine, the dual-clutch transmission comprising:
a first clutch and a second clutch selectively actuated to transmit motion from the engine to a first shaft and a second shaft respectively;
at least one first gear mounted to the first shaft; and
at least one second gear mounted to the second shaft,
the method comprising:
controlling the powertrain according to a first control strategy;
while the vehicle is at rest, receiving a mode indication indicating that a driver of the vehicle has selected a launch control mode for accelerating the vehicle from rest;
receiving a brake-on indication indicating that a braking system of the vehicle has been activated;
determining that an accelerator of the vehicle is in a launch control acceleration position;
in response to receiving at least the mode indication and the brake-on indication and determining that the acceleration is in the launch control acceleration position, controlling the powertrain according to a second control strategy to:
increase a speed of the engine to an increased idle speed that is greater than an idle speed of the engine in the first control strategy;
increase a torque of the first clutch and a torque of the second clutch to a respective predetermined torque value at which the clutch does not drive the corresponding one of the first shaft and the second shaft;
while controlling the powertrain according to the second control strategy:
receiving a brake-off indication indicating that the braking system has been released;
in response to receiving the brake-off indication:
increasing the engine speed according to the launch control acceleration position of the accelerator;
increasing the torque of the first clutch according to a predefined ramp to drive a lowest gear of the at least one first gear engaged on the first shaft;
engaging a lowest gear of the at least one second gear mounted on the second shaft; and
maintaining the torque of the second clutch at the predetermined torque value as long as the torque of the first clutch is being increased.