US 12,435,787 B2
Hydromechanical transmission with hydrostatic assembly and hydrostatic assembly control method
Lorenzo Dalla Palma, Arco (IT); Fabio Gunsch, Arco (IT); and Mario Gelmini, Arco (IT)
Assigned to DANA ITALIA S.R.L., Arco (IT)
Filed by DANA ITALIA S.R.L., Arco (IT)
Filed on Oct. 23, 2023, as Appl. No. 18/492,380.
Application 18/492,380 is a continuation of application No. 17/804,056, filed on May 25, 2022, granted, now 12,104,694.
Prior Publication US 2024/0044403 A1, Feb. 8, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. F16H 47/04 (2006.01); F16H 61/4035 (2010.01); F16H 61/42 (2010.01); F16H 61/421 (2010.01)
CPC F16H 61/4035 (2013.01) [F16H 47/04 (2013.01); F16H 61/42 (2013.01); F16H 61/421 (2013.01); F16H 2200/0039 (2013.01); F16H 2200/0086 (2013.01); F16H 2200/2005 (2013.01); F16H 2200/2041 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for operation of a transmission, comprising:
adjusting a displacement set-point of a variable displacement hydraulic motor in a hydrostatic assembly based on a kinematic constraint and/or a torque constraint of the hydrostatic assembly;
wherein the transmission includes:
the hydrostatic assembly that includes the variable displacement hydraulic motor that is hydraulically coupled in parallel with a variable displacement hydraulic pump; and
a multi-speed gearbox mechanically coupled to the hydrostatic assembly and including one or more clutches; and
wherein the kinematic constraint is determined based on a saturation pressure of a working fluid of the variable displacement hydraulic pump.