US 12,305,751 B2
Wheel slip flare controller using clutch control
Cory Benson LaRoche, Commerce Township, MI (US); Bradley Dean Riedle, Northville, MI (US); Stephen Michael Cicala, Dearborn Heights, MI (US); and Jianping Zhang, Ann Arbor, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US)
Filed on Oct. 27, 2022, as Appl. No. 17/975,106.
Prior Publication US 2024/0141987 A1, May 2, 2024
Int. Cl. F16H 61/04 (2006.01); F16H 59/40 (2006.01); F16H 59/50 (2006.01); F16H 61/28 (2006.01)
CPC F16H 61/2807 (2013.01) [F16H 59/40 (2013.01); F16H 59/50 (2013.01); F16H 2059/506 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A transmission comprising:
an output shaft having an output shaft speed;
on-coming and off-going clutches; and
a controller programmed to
during a power-on first upshift, in response to a derivative of the output shaft speed remaining below a threshold during a preparatory phase of the first upshift, release the off-going clutch with first clutch release timing and engage the on-coming clutch using a first stroke pressure and a first ratio change torque capacity; and
during a power-on second upshift, in response to the derivative of the output shaft speed exceeding the threshold during a preparatory phase of the second upshift, release the off-going clutch with second clutch release timing and engage the on-coming clutch using a second stroke pressure and a second ratio change torque capacity; wherein
the second stroke pressure, second ratio change torque capacity, and second off-going clutch release timing bias a torque transfer phase towards tie-up relative to the first stroke pressure, first ratio change torque capacity, and first off-going clutch release timing.