US 12,473,711 B2
System and method for providing supplemental hydraulic power for an electric work vehicle
Andrew Tarman, Dover, PA (US); and Mark D. Dilts, Mohnton, PA (US)
Assigned to CNH Industrial America LLC, New Holland, PA (US)
Filed by CNH Industrial America LLC, New Holland, PA (US)
Filed on Sep. 22, 2023, as Appl. No. 18/472,419.
Prior Publication US 2025/0101709 A1, Mar. 27, 2025
Int. Cl. E02F 3/84 (2006.01); E02F 3/76 (2006.01); E02F 9/20 (2006.01); E02F 9/22 (2006.01); F15B 1/02 (2006.01); F15B 1/033 (2006.01); F15B 11/16 (2006.01)
CPC E02F 3/844 (2013.01) [E02F 3/7618 (2013.01); E02F 9/207 (2013.01); E02F 9/2095 (2013.01); E02F 9/2217 (2013.01); E02F 9/2246 (2013.01); E02F 9/2267 (2013.01); E02F 9/2271 (2013.01); E02F 9/2289 (2013.01); F15B 1/024 (2013.01); F15B 1/033 (2013.01); F15B 11/165 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for providing supplemental hydraulic power for an electric work vehicle, the system comprising:
an electric motor;
a hydraulic pump coupled to the electric motor to allow the electric motor to rotationally drive the hydraulic pump, the hydraulic pump configured to supply pressurized hydraulic fluid through a hydraulic circuit to at least one hydraulic component of the electric work vehicle;
a hydraulic accumulator configured to provide a temporary supply of pressurized hydraulic fluid within the hydraulic circuit;
a control valve configured to regulate the temporary supply of pressurized hydraulic fluid from the hydraulic accumulator to the hydraulic circuit;
a computing system communicatively coupled to the control valve, the computing system being configured to:
determine that an operation of the at least one hydraulic component is to be adjusted;
determine an operational status of the hydraulic pump;
in response to determining that the hydraulic pump is in a low output state, control the operation of the control valve to fluidly connect the hydraulic accumulator to the hydraulic circuit to allow the hydraulic accumulator to provide the temporary supply of pressurized hydraulic fluid for adjusting the operation of the at least one hydraulic component; and
control the operation of the control valve to fluidly disconnect the hydraulic accumulator from the hydraulic circuit after the operational status of the hydraulic pump has transitioned from the low output state to a normal output state.
 
11. A method for providing supplemental hydraulic power for an electric work vehicle, the electric work vehicle including an electric motor and a hydraulic pump configured to be rotationally driven by the electric motor, the hydraulic pump being configured to supply pressurized hydraulic fluid through a hydraulic circuit to at least one hydraulic component of the electric work vehicle, the method comprising:
determining, with a computing system, that an operation of the at least one hydraulic component is to be adjusted;
determining, with the computing system, an operational status of the hydraulic pump;
in response to determining that the hydraulic pump is in a low output state, controlling, with the computing system, an operation of a control valve to fluidly connect a hydraulic accumulator to the hydraulic circuit to allow the hydraulic accumulator to provide a temporary supply of pressurized hydraulic fluid for adjusting the operation of the at least one hydraulic component; and
controlling, with the computing system, the operation of the control valve to fluidly disconnect the hydraulic accumulator from the hydraulic circuit after the operational status of the hydraulic pump has transitioned from the low output state to a normal output state.