US 11,655,614 B2
Hydraulic transmission system with configurable virtual gears
Richard Leigh Greenwell, Wichita, KS (US); Van Jameson Hall, Garden Plain, KS (US); David R. Natzke, Wichita, KS (US); and Joshua Zimmerman, Willow Springs, IL (US)
Assigned to CNH Industrial America LLC, New Holland, PA (US)
Filed by CNH Industrial America LLC, New Holland, PA (US)
Filed on Dec. 24, 2020, as Appl. No. 17/133,788.
Prior Publication US 2022/0205220 A1, Jun. 30, 2022
Int. Cl. E02F 9/22 (2006.01); F16H 61/462 (2010.01); F16H 61/421 (2010.01)
CPC E02F 9/2253 (2013.01) [E02F 9/2235 (2013.01); E02F 9/2296 (2013.01); F16H 61/462 (2013.01); F16H 61/421 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A hydraulic system for a work vehicle, the hydraulic system comprising:
a hydraulic motor configured to generate rotational power for one or more wheels on the work vehicle;
a hydraulic pump coupled to the hydraulic motor, wherein the hydraulic pump is configured to pump hydraulic fluid to the hydraulic motor; and
a hydraulic control system comprising a processor that is configured to:
receive an input indicative of a selection of a number of speed ranges that span between a minimum speed and a maximum speed for the work vehicle;
provide a respective motor command to set a motor volume of the hydraulic motor and a respective pump command to set a limit for a pump volume of the hydraulic pump to enable the number of speed ranges for the work vehicle;
receive an additional input indicative of an additional selection of a different number of speed ranges, wherein the number of speed ranges and the different number of speed ranges span between the minimum speed and the maximum speed for the work vehicle; and
provide a respective motor command to set the motor volume of the hydraulic motor and a respective pump command to set the limit for the pump volume of the hydraulic pump to enable the different number of speed ranges for the work vehicle.
 
12. A hydraulic control system for a work vehicle, the hydraulic control system comprising a processor that is configured to:
receive a configuration input from an operator indicative of a selection of a first number of speed ranges that span between a minimum speed and a maximum speed for the work vehicle;
receive a first shift input from the operator indicative of a request to shift to a first speed range of the first number of speed ranges;
provide a pump command to set a limit for a pump volume to a first limit to enable the first speed range of the first number of speed ranges; and
receive an additional configuration input from the operator indicative of an additional selection of a second number of speed ranges that span between the minimum speed and the maximum speed for the work vehicle.
 
18. A method of operating a hydraulic system for a work vehicle, the method comprising:
receiving, at one or more processors, an input indicative of a selection of a first number of speed ranges that span between a minimum speed and a maximum speed for the work vehicle;
setting, using the one or more processors and in response to the input, a motor volume of a hydraulic motor and a limit for a pump volume of a hydraulic pump to enable the number of speed ranges;
receiving, at the one or more processors, an additional input indicative of an additional selection of a second number of speed ranges that span between the minimum speed and the maximum speed for the work vehicle; and
setting, using the one or more processors and in response to the additional input, the motor volume of the hydraulic motor and the limit for the pump volume of the hydraulic pump to enable the second number of speed ranges.