Abstract: A vehicle control system for an agriculture vehicle. The vehicle control system includes a processing circuit including a processor and memory, the memory having instructions stored thereon that, when executed by the processor, cause the processing circuit to receive an engine speed of the agricultural vehicle, determine a difference between the engine speed and a desired engine speed, determine whether the difference is larger than an engine speed threshold, and control, responsive to the difference being larger than the engine speed threshold, the agricultural vehicle to shift to neutral.

Abstract: A system includes a driveline, a user interface, and a control system. The driveline includes an engine, a transmission, and a clutch positioned to selectively couple the engine to the transmission. The user interface is configured to facilitate operator shifting of the transmission. The control system is configured to perform a transmission auto-shift procedure where the control system monitors engine speed of the engine for a period of time following completion of a downshift event with the transmission from a first, higher gear to a second, lower gear, compares the engine speed to at least one speed threshold, and automatically upshifts the transmission from the second, lower gear back to the first, higher gear (i) following expiration of the period of time and/or (ii) in response to the engine speed exceeding the at least one speed threshold during the period of time.

Abstract: An electronic braking system including a prime mover speed sensor structured to sense a prime mover speed, a vehicle speed sensor structured to sense a vehicle speed, one or more processing circuits comprising one or more memory devices coupled to one or more processors, the one or more memory devices configured to store instructions thereon that, when executed by the one or more processors, cause the one or more processors to determine an overspeed condition based on the prime mover speed and the vehicle speed, generate a tuned overspeed value based on the overspeed condition, and generate a braking command based on the tuned overspeed value.

Abstract: A method for controlling the operation of a transmission of a work vehicle based on the detection of unintended vehicle motion may generally include determining an intended driving direction for the work vehicle while the vehicle is positioned on a sloped surface and initiating a shifting procedure within the transmission for engaging an on-coming clutch associated with moving the work vehicle in the intended driving direction, wherein the on-coming clutch is initially engaged at an initial ramp rate. In addition, the method may include monitoring an acceleration of the work vehicle as the on-coming clutch is being engaged, determining a current travel direction for the work vehicle based on the monitored acceleration and, when the current travel direction differs from the intended driving direction, adjusting the initial ramp rate for engaging the on-coming clutch to an increased ramp rate.

Abstract: A system of a work vehicle includes an engine, a transmission that includes a hydrostatic unit, and a clutch coupled to the transmission. The system also includes a controller communicatively coupled to the engine, the transmission, and the clutch. The controller, in operation, receives a command to disengage the clutch. The controller, in operation, determines an engine speed of the engine. The controller, in operation, also determines a temperature of hydraulic fluid in the clutch. The controller, in operation, further determines a magnitude and time to limit acceleration of the work vehicle based on the engine speed and the temperature. The controller, in operation, also commands the clutch to disengage. The controller, in operation, further limits the acceleration of the work vehicle using the hydrostatic unit based on the magnitude for the time determined.

Abstract: A method for controlling the operation of a transmission of a work vehicle based on the detection of unintended vehicle motion may generally include determining an intended driving direction for the work vehicle while the vehicle is positioned on a sloped surface and initiating a shifting procedure within the transmission for engaging an on-coming clutch associated with moving the work vehicle in the intended driving direction, wherein the on-coming clutch is initially engaged at an initial ramp rate. In addition, the method may include monitoring an acceleration of the work vehicle as the on-coming clutch is being engaged, determining a current travel direction for the work vehicle based on the monitored acceleration and, when the current travel direction differs from the intended driving direction, adjusting the initial ramp rate for engaging the on-coming clutch to an increased ramp rate.

Abstract: A system of a work vehicle includes an engine, a transmission that includes a hydrostatic unit, and a clutch coupled to the transmission. The system also includes a controller communicatively coupled to the engine, the transmission, and the clutch. The controller, in operation, receives a command to disengage the clutch. The controller, in operation, determines an engine speed of the engine. The controller, in operation, also determines a temperature of hydraulic fluid in the clutch. The controller, in operation, further determines a magnitude and time to limit acceleration of the work vehicle based on the engine speed and the temperature. The controller, in operation, also commands the clutch to disengage. The controller, in operation, further limits the acceleration of the work vehicle using the hydrostatic unit based on the magnitude for the time determined.

Abstract: A system includes an agricultural vehicle, including an engine; a transmission with multiple gear ratios driven by the engine, and a controller. The controller is configured to receive a requested wheel speed input by an operator, calculate a desired engine speed, command a gear upshift if a current engine speed is more than the desired engine speed and if upshifting will locate the current engine speed closer to the desired engine speed, and command a gear downshift if the current engine speed is less than the desired engine speed and if downshifting will locate the current engine speed closer to the desired engine speed.

Abstract: In one aspect, a computer-implemented method for preventing centrifugal clutch lock-ups within a work vehicle transmission may generally include transmitting a signal associated with disengaging a clutch of the transmission, wherein the clutch includes a hydraulic actuator having a pressure relief valve. The method may also include monitoring a pressure of the hydraulic fluid supplied to the actuator relative to a predetermined pressure threshold and monitoring a rotational speed of a clutch can associated with the clutch relative to a predetermined speed threshold, wherein the speed threshold is defined relative to a lock-up speed associated with the clutch can. In addition, the method may include transmitting a lock-up signal associated with limiting the rotational speed of the clutch can and/or providing an indication that a clutch lock-up is likely to occur when the pressure exceeds the pressure threshold and the rotational speed exceeds the speed threshold.

Abstract: A method for controlling rollback of a work vehicle may include receiving a signal indicating that a pedal of the work vehicle has been depressed, wherein the work vehicle is initially traveling in a first direction up an inclined surface such that at least one clutch of the transmission is engaged. In addition, the method may include reducing a pressure within the at least one clutch after receiving the signal in order to decelerate the work vehicle in the first direction and engaging a parking brake of the work vehicle as the work vehicle reverses direction and travels in a second direction down the inclined surface.

Abstract: A braking system for a work vehicle may generally include a hydraulically actuated brake, a tank containing hydraulic fluid and a brake valve fluidly connected between the tank and the hydraulically actuated brake. The brake valve may be movable between an on position and an off position for controlling a flow of the hydraulic fluid from the tank to the hydraulically actuated brake. The brake valve may include a first solenoid coil and a second solenoid coil, with each of the solenoid coils being configured to be independently energized and de-energized for moving the brake valve between the on and off positions. The system may also include a first control device electrically connected to the first solenoid coil for energizing and de-energizing the first solenoid coil and a separate second control device electrically connected to the second solenoid coil for energizing and de-energizing the second solenoid coil.

Abstract: In one aspect, a method for controlling a continuously variable transmission when transitioning the transmission from operation within a hydrostatic mode to operation within a hydro-mechanical mode may generally include initially operating the transmission in the hydrostatic mode, receiving a mode switch signal associated with transitioning the operation of the transmission to the hydro-mechanical mode and initiating a clutch swap between a secondary range clutch and a directional clutch of the transmission. In addition, the method may include adjusting a swash plate angle of the transmission as the directional clutch is slipped in order to transition the operation of the transmission to a point along a hydro-mechanical operating curve and fully engaging the directional clutch to allow operation of the transmission along the hydro-mechanical operating curve.

Abstract: In one aspect, a computer-implemented method for preventing centrifugal clutch lock-ups within a work vehicle transmission may generally include transmitting a signal associated with disengaging a clutch of the transmission, wherein the clutch includes a hydraulic actuator having a pressure relief valve. The method may also include monitoring a pressure of the hydraulic fluid supplied to the actuator relative to a predetermined pressure threshold and monitoring a rotational speed of a clutch can associated with the clutch relative to a predetermined speed threshold, wherein the speed threshold is defined relative to a lock-up speed associated with the clutch can. In addition, the method may include transmitting a lock-up signal associated with limiting the rotational speed of the clutch can and/or providing an indication that a clutch lock-up is likely to occur when the pressure exceeds the pressure threshold and the rotational speed exceeds the speed threshold.

Abstract: A method for controlling acceleration of a work vehicle may generally include determining a vehicle speed error based on a desired speed and an actual speed of the work vehicle, calculating an initial acceleration command based on the vehicle speed error, monitoring a current engine load on the vehicle engine, determining an engine load error for the engine based on the current engine load and calculating an acceleration limit for the work vehicle based on the engine load error, wherein the acceleration limit is calculated via a PID control algorithm implemented by a computing device of the vehicle. The method may also include controlling the operation of the engine and/or the transmission of the work vehicle based on a final acceleration command to adjust the actual speed of the work vehicle, wherein the final acceleration command corresponds to the lesser of the initial acceleration command and the acceleration limit.

Abstract: A braking system for a work vehicle may generally include a hydraulically actuated brake, a tank containing hydraulic fluid and a brake valve fluidly connected between the tank and the hydraulically actuated brake. The brake valve may be movable between an on position and an off position for controlling a flow of the hydraulic fluid from the tank to the hydraulically actuated brake. The brake valve may include a first solenoid coil and a second solenoid coil, with each of the solenoid coils being configured to be independently energized and de-energized for moving the brake valve between the on and off positions. The system may also include a first control device electrically connected to the first solenoid coil for energizing and de-energizing the first solenoid coil and a separate second control device electrically connected to the second solenoid coil for energizing and de-energizing the second solenoid coil.

Abstract: In one aspect, a computer-implemented method for enhancing the performance of a continuously variable transmission of a work vehicle may include engaging a range clutch of the continuously variable transmission, cycling a directional clutch of the continuously variable transmission between an engaged state and a disengaged state while the range clutch is engaged and controlling a position of a swash plate of the continuously variable transmission such that a ground speed of the work vehicle is maintained substantially at zero while the directional clutch is cycled between the engaged and disengaged states.

Abstract: In one aspect, a method for controlling the operation of a work vehicle including a power shift transmission is disclosed. The method may include receiving, with a controller, a speed command signal from an input device instructing the controller to reduce a vehicle speed of the work vehicle to zero, controlling at least one clutch of the power shift transmission in order to initially reduce the vehicle speed and proportionally applying a parking brake of the work vehicle to reduce the vehicle speed to zero.

Abstract: A method for controlling a continuously variable transmission of a work machine during a shuttle shift is disclosed. The method may generally include initiating a directional swap by disengaging an off-going directional clutch of the continuously variable transmission and slipping an on-coming directional clutch of the continuously variable transmission to decelerate the work machine in an off-going direction. In addition, the method may include estimating a total amount of energy to be dissipated in the on-coming directional clutch during the shuttle shift, comparing the total amount of energy to a predetermined energy threshold and, if the total amount of energy is equal to or exceeds the predetermined energy threshold, performing the reversion action to complete the shuttle shift, wherein the reversion action corresponds to an action taken to engage one of the off-going directional clutch or the on-coming directional clutch so as to permit the shuttle shift to be completed using ratio changing.

Abstract: In one aspect, a computer-implemented method for automatically calibrating clutches within a transmission of a work vehicle may include determining, with a computing device, whether a plurality of predetermined conditions are satisfied for performing a clutch calibration on a clutch of the transmission. The predetermined conditions may require that the work vehicle be in park and that a predetermined time period has elapsed since a previous clutch calibration was performed on the clutch. In addition, the method may include automatically initiating the clutch calibration without requiring operator input when the predetermined conditions are satisfied and performing the clutch calibration in order to calibrate the clutch.

Abstract: A method for performing a shuttle shift with a continuously variable transmission of a work machine is disclosed. The method may generally include adjusting a swash plate angle of a hydrostatic power unit of the transmission in a first direction to reduce a travel speed of the work machine in an off-going direction, initiating a directional swap between an off-going directional clutch of the continuously variable transmission and an on-coming directional clutch of the continuously variable transmission while the work machine is traveling in the off-going direction and adjusting the swash plate angle of the hydrostatic unit in a second direction after the initiation of the directional swap to reduce slippage across the on-coming directional clutch, wherein the second direction is opposite the first direction.