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公开(公告)号：US11933024B2
公开(公告)日：2024-03-19
申请号：US17802732
申请日：2021-02-25
IPC分类号： E02F9/22
CPC分类号： E02F9/2203 , E02F9/2246
摘要： An electric work vehicle a pump configured to supply hydraulic fluid to a component of the electric work vehicle. Moreover, the electric work vehicle includes a sensor configured to capture data indicative of a pressure of the hydraulic fluid and a controller communicatively coupled to the sensor. As such, the controller is configured to monitor the pressure of the hydraulic fluid relative to a predetermined threshold pressure value based on the data captured the sensor. In addition, the controller is configured to control the operation of the pump such that the pump is switched from a first operating speed range to a second operating speed range when the monitored pressure of the hydraulic fluid falls below the predetermined threshold pressure value.
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公开(公告)号：US11261582B1
公开(公告)日：2022-03-01
申请号：US17162237
申请日：2021-01-29
发明人： Christopher Alan Andreuccetti , Francesco Pintore , Stefano Fiorati , Jason David Fox , Andrea Vacca , Riccardo Madau
摘要： A system for controlling hydraulic fluid flow within a work vehicle includes a flow control valve fluidly coupled to a fluid supply conduit upstream of a hydraulic actuator such that the flow control valve is configured to control the flow rate of hydraulic fluid to the hydraulic actuator. Furthermore, the system includes a computing system configured to receive an input associated with a selected flow rate of the hydraulic fluid being supplied to the hydraulic actuator. Moreover, the computing system is configured to control an operation of the flow control valve such that flow control valve is at a maximum flow position at which an adjustable orifice defined by the valve has a maximum cross-sectional area. Additionally, the computing system is configured to control an operation of a pump such that the pump supplies the hydraulic fluid to the hydraulic actuator through the adjustable orifice at the selected flow rate.
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公开(公告)号：US20180244252A1
公开(公告)日：2018-08-30
申请号：US15444781
申请日：2017-02-28
摘要： The present disclosure is directed to a braking system for a work vehicle having hydraulically-actuated brakes. The braking system includes a primary release valve, a secondary release valve, and at least one braking mechanism having one or more brake springs. The braking mechanism(s) is hydraulically coupled to the primary release valve and the secondary release valve via one or more hydraulic lines. As such, during full-power operation of the work vehicle, when the brakes are to be released, the primary release valve is energized so as to overcome a valve biasing spring, thereby shifting the primary release valve so as to direct pressurized hydraulic fluid to the braking mechanism(s). Further, when the brakes are to be applied, the primary release valve is inactive so as to allow the hydraulic fluid to flow away from the braking mechanism(s) to a primary reservoir such that the one or more brake springs compress the braking mechanism(s). Alternatively, when power is lost to the work vehicle, the secondary release valve bypasses the primary release valve and directs pressurized hydraulic fluid to the braking mechanism(s) to release the brakes.
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公开(公告)号：US11982070B2
公开(公告)日：2024-05-14
申请号：US17907947
申请日：2021-02-26
IPC分类号： E02F9/20 , E02F9/22 , F15B19/00 , F15B21/0427 , E02F3/96
CPC分类号： E02F9/2095 , E02F9/226 , F15B19/00 , F15B21/0427 , E02F3/964 , F15B2211/20515 , F15B2211/62 , F15B2211/6343 , F15B2211/66 , F15B2211/6651
摘要： An electric work vehicle includes a hydraulic actuator and a pump configured to supply hydraulic fluid to the hydraulic actuator, with the pump being operable within an operating speed range extending between a minimum operating speed value and a maximum operating speed value. Furthermore, the electric work vehicle includes a sensor configured to capture data indicative of a temperature of the hydraulic fluid and a controller communicatively coupled to the sensor. As such, the controller is configured to monitor the temperature of the hydraulic fluid relative to a predetermined minimum fluid temperature as the pump is operating within the operating speed range. In addition, the controller is configured to adjust the operating speed range of the pump by increasing at least one of the minimum operating speed value or the maximum operating speed value when the monitored temperature of the hydraulic fluid falls below the predetermined minimum fluid temperature.
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公开(公告)号：US20230098498A1
公开(公告)日：2023-03-30
申请号：US17802732
申请日：2021-02-25
IPC分类号： E02F9/22
摘要： An electric work vehicle a pump configured to supply hydraulic fluid to a component of the electric work vehicle. Moreover, the electric work vehicle includes a sensor configured to capture data indicative of a pressure of the hydraulic fluid and a controller communicatively coupled to the sensor. As such, the controller is configured to monitor the pressure of the hydraulic fluid relative to a predetermined threshold pressure value based on the data captured the sensor. In addition, the controller is configured to control the operation of the pump such that the pump is switched from a first operating speed range to a second operating speed range when the monitored pressure of the hydraulic fluid falls below the predetermined threshold pressure value.
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公开(公告)号：US20220134843A1
公开(公告)日：2022-05-05
申请号：US17512275
申请日：2021-10-27
发明人： Christopher Alan Andreuccetti , Justin Mehmert , Joseph E. Borg , Richard Niespodzany , Douglas K. Braswell
摘要： In one aspect, a cab heating system for an electric work vehicle includes a hydraulic circuit forming a hydraulic flow loop through which a hydraulic fluid is directed for supply to a hydraulic component of the electric work vehicle. The system also includes a coolant circuit forming a coolant flow loop through which a coolant fluid is circulated, with the coolant circuit comprising a coolant heat exchanger. Additionally, the system includes a circuit heat exchanger thermally coupling the hydraulic circuit to the coolant circuit to allow heat to be transferred between the hydraulic fluid and the coolant fluid, and a fan configured to direct an airflow across the coolant heat exchanger such that heat is transferred from the coolant fluid to the airflow prior to delivery of the airflow into an interior of a cab of the electric work vehicle.
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公开(公告)号：US20230151584A1
公开(公告)日：2023-05-18
申请号：US17907947
申请日：2021-02-26
IPC分类号： E02F9/20 , E02F9/22 , F15B19/00 , F15B21/0427
CPC分类号： E02F9/2095 , E02F9/226 , F15B19/00 , F15B21/0427 , E02F3/964
摘要： An electric work vehicle includes a hydraulic actuator and a pump configured to supply hydraulic fluid to the hydraulic actuator, with the pump being operable within an operating speed range extending between a minimum operating speed value and a maximum operating speed value. Furthermore, the electric work vehicle includes a sensor configured to capture data indicative of a temperature of the hydraulic fluid and a controller communicatively coupled to the sensor. As such, the controller is configured to monitor the temperature of the hydraulic fluid relative to a predetermined minimum fluid temperature as the pump is operating within the operating speed range. In addition, the controller is configured to adjust the operating speed range of the pump by increasing at least one of the minimum operating speed value or the maximum operating speed value when the monitored temperature of the hydraulic fluid falls below the predetermined minimum fluid temperature.
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公开(公告)号：US20230097590A1
公开(公告)日：2023-03-30
申请号：US17802341
申请日：2021-02-26
摘要： In one aspect, an electric work vehicle includes a chassis extending in a longitudinal direction between a first end and an opposed second end, and a cab supported between the first and second ends of the chassis. The work vehicle also includes a work implement assembly positioned at the first end or the second end, and a storage compartment defining a storage volume extending in the longitudinal direction between the cab and the first end or the second end. Moreover, the electric work vehicle includes a battery module positioned within the storage compartment, and a drivetrain including an electric traction motor positioned within the storage compartment and configured to be operated via power supplied from the battery module. The electric traction motor is coupled to a transmission of the drivetrain to allow torque to be transferred from the traction motor to corresponding traction devices of the electric work vehicle.
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公开(公告)号：US10562507B2
公开(公告)日：2020-02-18
申请号：US15444781
申请日：2017-02-28
摘要： The present disclosure is directed to a braking system for a work vehicle having hydraulically-actuated brakes. The braking system includes a primary release valve, a secondary release valve, and at least one braking mechanism having one or more brake springs. The braking mechanism(s) is hydraulically coupled to the primary release valve and the secondary release valve via one or more hydraulic lines. As such, during full-power operation of the work vehicle, when the brakes are to be released, the primary release valve is energized so as to overcome a valve biasing spring, thereby shifting the primary release valve so as to direct pressurized hydraulic fluid to the braking mechanism(s). Further, when the brakes are to be applied, the primary release valve is inactive so as to allow the hydraulic fluid to flow away from the braking mechanism(s) to a primary reservoir such that the one or more brake springs compress the braking mechanism(s). Alternatively, when power is lost to the work vehicle, the secondary release valve bypasses the primary release valve and directs pressurized hydraulic fluid to the braking mechanism(s) to release the brakes.
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