Cnh Industrial America LLC

Cnh America LLC

Cnh Industrial Italia S.p.a.

Cnh Italia Spa

Joseph R Shoemaker

Kushan Vora

David Schulte

Christopher Alan Andreuccetti

Swapnil Tandel

Nicholas Chibucos

Navneet Gulati

Haibo Guo

Joshua D Zimmerman

Matthew J Hennemann

Andrea Gravili

Antonio Venezia

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.

System and method for heating the hydraulic fluid of an electric work vehicle

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.

System and method for controlling pump operating speed range of an electric work vehicle based on hydraulic fluid pressure

A system includes a vehicle controller which includes a memory configured to store instructions and one or more processors. The vehicle controller is configured to set a fuel efficient operation mode. The fuel efficient operation mode includes setting a commanded engine speed to a nominal engine speed located within a range of optimal fuel efficiency engine speeds of a brake specific fuel consumption map. The fuel efficient operation mode also includes instructing an engine to operate at the commanded engine speed. The fuel efficient operation mode also includes determining a monitored engine speed. The fuel efficient operation mode also includes adjusting a commanded pump displacement in response to the monitored engine speed exceeding the range of optimal fuel efficiency engine speeds. The fuel efficient operation mode also includes instructing a hydraulic pump to operate at the commanded pump displacement.

Fuel efficient operation mode

A method for executing straight tracking control may include receiving an input command(s) associated with controlling the operation of a first-side drive system and/or a second-side drive system of a hydrostatic transmission of a work vehicle to drive the vehicle along a straight path. The method may also include receiving first and second speed signals associated with the output speeds of the drive systems, and modifying the first speed signal or the second speed signal based on a speed scaling factor to generate a corrected speed signal. In addition, the method may include determining an adjusted control command for controlling the operation of the hydrostatic transmission as a function of the input command(s) and a control output determined based on the corrected speed signal. Further, the method may include controlling the operation of the hydrostatic transmission based at least in part on the adjusted control command.

System and method for executing straight tracking control of a work vehicle

The straight tracking control system can use a control method to achieve a desired straight motion of a machine with a dual path electronically controlled hydrostatic transmission. In the control method, the first drive system, e.g., the left or right drive system, pump solenoid current can be modified based on first and second drive system velocity feedback when the machine is commanded to move in a straight line path in the forward or reverse direction. A memory latching concept is used to latch the straight tracking factor at the initiation of and during the turn so the same straight tracking factor is used throughout the turn. The straight tracking factor is unlatched at the completion of a turn after a specific time delay and a new straight tracking factor can be calculated. The straight tracking method also utilizes transmission fluid temperature and utilizes additional fluid reserve in order to maintain straight machine movement.

Straight tracking control system for a machine with a dual path electronically controlled hydrostatic transmission

A method of managing engine load by adjusting the pump and motor displacements of a dual path electronically controlled hydrostatic transmission utilizes the difference between the reference and actual engine speeds, the temperature of the working fluid for the dual path electronically controlled hydrostatic transmission, the engine governor droop value, the vehicle speed and lookup tables to determine pump and motor command adjustment factors associated with specific engine loading conditions.

Load control for a machine with a dual path electronically controlled hydrostatic transmission

A work vehicle includes a fluid circuit to operate at least one implement for performing work, the fluid circuit having at least a first operating mode and a second operating mode. The first operating mode is configured to operate within a first predetermined flow rate range within a first predetermined fluid pressure level range. The second operating mode is configured to operate within a second predetermined flow rate range and within a second predetermined fluid pressure level range. In response to the fluid circuit operating within the second operating mode, a maximum pressure value of the second predetermined fluid pressure level range is greater than a maximum pressure value of the first predetermined fluid pressure level range, and a maximum value of the second predetermined flow level range is less than a maximum value of the first predetermined flow level range.

Work vehicle lifting performance

An electronic throttle control system for a motorized vehicle includes a sensor providing a signal corresponding to a relative position of an accelerator pedal between an undepressed position and a fully depressed position at a first predetermined time interval. A memory device is provided for storing a plurality of provided signals. A controller is provided for averaging a predetermined number of provided signals and sending the averaged signal to the motor at a second predetermined time interval for modulating operating speed of the motor. Upon the memory device storing the predetermined number of provided signals, provided signals are discarded from the memory device on a first in, first out basis.

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West Burlington, IA, United States of America

Joseph R Shoemaker