US 12,228,206 B1
Control systems to dampen output shaft oscillations, vehicles and transmissions incorporating the same, and methods therefor
Jeff Runde, Fishers, IN (US); Doug Hansel, Indianapolis, IN (US); and Tyler Swedes, Indianapolis, IN (US)
Assigned to Allison Transmission, Inc., Indianapolis, IN (US)
Filed by ALLISON TRANSMISSION, INC., Indianapolis, IN (US)
Filed on Feb. 26, 2024, as Appl. No. 18/587,168.
Int. Cl. F16H 61/06 (2006.01); F16H 59/40 (2006.01); F16H 63/30 (2006.01); F16H 57/00 (2012.01)
CPC F16H 61/061 (2013.01) [F16H 59/40 (2013.01); F16H 63/3026 (2013.01); F16H 2057/0012 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A vehicle comprising:
a chassis;
a plurality of wheels coupled to the chassis; and
a powertrain mounted to the chassis including a transmission comprising
an input shaft to receive torque from a drive unit,
an output shaft to transmit torque to a load,
at least one torque-transmitting mechanism coupled between the input shaft and the output shaft, and
a control system including an output speed sensor to provide an input signal indicative of a rotational speed of the output shaft and a controller communicatively coupled to the output speed sensor,
wherein:
the controller includes a processor and memory having instructions stored therein, and
the instructions are executable by the processor to cause the processor to monitor the rotational speed of the output shaft based on the input signal, to determine a difference between the monitored rotational speed and a reference rotational speed of the output shaft, to determine an adjustment to an oncoming clutch pressure to be applied to the at least one torque-transmitting mechanism based on the difference, to determine a compensated clutch pressure to be applied to the at least one torque-transmitting mechanism based on the adjustment, and to apply the compensated clutch pressure to the at least one torque-transmitting mechanism to dampen oscillations at the output shaft in use of the vehicle.