	US 12,258,021 B2
	Hydromechanical transmission and control method
Lorenzo Dalla Palma, Arco (IT); Mario Gelmini, Arco (IT); and Claudio Angeloni, Arco (IT)
Assigned to DANA ITALIA S.R.L., Arco (IT)
Filed by DANA ITALIA S.R.L., Trentino (IT)
Filed on Jun. 22, 2023, as Appl. No. 18/339,552.
Application 18/339,552 is a continuation of application No. 17/448,323, filed on Sep. 21, 2021, granted, now 11,731,634.
Prior Publication US 2023/0331233 A1, Oct. 19, 2023
Int. Cl. B60W 50/00 (2006.01); B60K 17/10 (2006.01); B60W 10/02 (2006.01); B60W 10/103 (2012.01); B60W 30/18 (2012.01); B60W 30/188 (2012.01); B60W 40/10 (2012.01); B60W 50/06 (2006.01); F16H 47/04 (2006.01); F16H 61/4008 (2010.01); F16H 61/433 (2010.01); F16H 61/47 (2010.01); F16H 61/472 (2010.01)

CPC B60W 30/188 (2013.01) [B60K 17/10 (2013.01); B60W 10/02 (2013.01); B60W 10/103 (2013.01); B60W 30/18172 (2013.01); B60W 40/10 (2013.01); B60W 50/06 (2013.01); F16H 47/04 (2013.01); F16H 61/433 (2013.01); F16H 61/47 (2013.01); F16H 61/472 (2013.01); B60W 2050/0012 (2013.01); B60W 2510/0638 (2013.01)]

12 Claims

1. A method for operation of a hydromechanical variable transmission (HVT) system, comprising:

operating a hydrostatic unit in a torque control mode based on vehicle operating conditions and via a feedforward control architecture that includes a model;

wherein the hydrostatic unit comprises a hydrostatic pump that is hydraulically coupled to a hydrostatic motor;

wherein the hydrostatic unit is rotationally coupled to a planetary gear set, and

wherein the feedforward control architecture uses one or more junction filters.