Abstract: A system for controlling a brake of a unit hauled by a work vehicle may generally include a valve assembly. When a speed of the work vehicle exceeds a predetermined speed threshold, the valve assembly may be configured to allow the brake to be actuated when first and second brake pedals of the work vehicle are depressed, either individually or simultaneously. However, when the speed of the work vehicle is less than the predetermined speed threshold, the valve assembly may only be configured to allow the brake to be actuated when both of the first and second brake pedals are depressed simultaneously.

Abstract: A planter system includes a planter having an unloading valve and a controller. The unloading valve is fluidly coupled between an inlet and an outlet of a pump. The unloading valve is configured to receive a fluid at a supply pressure, to supply a first portion of the fluid from the inlet to a hydraulic planter system at an unloading pressure less than the supply pressure, and to recirculate a remainder of the fluid to the pump via the outlet. The controller is communicatively coupled to the unloading valve and to the pump. The controller is configured to control the pressure of the fluid supplied to the inlet and to control the unloading pressure of the first portion supplied to the hydraulic planter system.

Abstract: A planter system includes a planter having an unloading valve and a controller. The unloading valve is fluidly coupled between an inlet and an outlet of a pump. The unloading valve is configured to receive a fluid at a supply pressure, to supply a first portion of the fluid from the inlet to a hydraulic planter system at an unloading pressure less than the supply pressure, and to recirculate a remainder of the fluid to the pump via the outlet. The controller is communicatively coupled to the unloading valve and to the pump. The controller is configured to control the pressure of the fluid supplied to the inlet and to control the unloading pressure of the first portion supplied to the hydraulic planter system.

Abstract: A system for controlling a brake of a unit hauled by a work vehicle may generally include a valve assembly. When a speed of the work vehicle exceeds a predetermined speed threshold, the valve assembly may be configured to allow the brake to be actuated when first and second brake pedals of the work vehicle are depressed, either individually or simultaneously. However, when the speed of the work vehicle is less than the predetermined speed threshold, the valve assembly may only be configured to allow the brake to be actuated when both of the first and second brake pedals are depressed simultaneously.

Abstract: In one aspect, a system for controlling the supply of hydraulic fluid to an implement may include a pump, a control valve coupled to the pump and first and second fluid lines provided in flow communication with output ports of the control valve. The system may also include a pressure control valve configured to regulate a pressure of the hydraulic fluid being supplied to the control valve such that the hydraulic fluid is supplied to the control valve at a first pressure for raising at least one ground-engaging component of the implement and a second pressure for lowering the ground-engaging component(s). Moreover, the system may include a bypass line in fluid communication with the pressure control valve such that fluid diverted through the bypass line actuates the pressure control valve to adjust the fluid pressure of the hydraulic fluid supplied to the control valve between the first and second pressures.

Abstract: In one aspect, a system for controlling the supply of hydraulic fluid to an implement of a work vehicle may generally include a pump, a control valve coupled to the pump and first and second fluid lines provided in flow communication with output ports of the control valve. The system may also include a pressure control valve provided in flow communication with the second fluid line that is configured to regulate a fluid pressure of the hydraulic fluid being supplied to a hydraulic cylinder of the implement. Additionally, the system may include a bypass fluid line configured to provide a flow path for hydraulic fluid between the pump and the second fluid line that is independent of the control valve and a load sensing line configured to provide an indication of the fluid pressure of the hydraulic fluid being supplied to the hydraulic cylinder.

Abstract: A system for supplying fluid within a work vehicle may generally include a track drive box including first and second inlet ports and an outlet port. The system may also include a first supply conduit in fluid communication with the first inlet port and a second supply conduit in fluid communication with the second inlet port. The first supply conduit may be configured to supply a working fluid to the track drive box and the second supply conduit may be configured to supply a pressurized fluid to the track drive box, wherein the pressurized fluid serves to pressurize an interior of the track drive box, Additionally, the system may include an evacuation conduit in fluid communication with the outlet port that is configured to receive the working fluid as it is expelled from the outlet port.

Abstract: A planter system includes a planter having an unloading valve and a controller. The unloading valve is fluidly coupled between an inlet and an outlet of a pump. The unloading valve is configured to receive a fluid at a supply pressure, to supply a first portion of the fluid from the inlet to a hydraulic planter system at an unloading pressure less than the supply pressure, and to recirculate a remainder of the fluid to the pump via the outlet. The controller is communicatively coupled to the unloading valve and to the pump. The controller is configured to control the pressure of the fluid supplied to the inlet and to control the unloading pressure of the first portion supplied to the hydraulic planter system.

Abstract: A planter system includes a planter having an unloading valve and a controller. The unloading valve is fluidly coupled between an inlet and an outlet of a pump. The unloading valve is configured to receive a fluid at a supply pressure, to supply a first portion of the fluid from the inlet to a hydraulic planter system at an unloading pressure less than the supply pressure, and to recirculate a remainder of the fluid to the pump via the outlet. The controller is communicatively coupled to the unloading valve and to the pump. The controller is configured to control the pressure of the fluid supplied to the inlet and to control the unloading pressure of the first portion supplied to the hydraulic planter system.

Abstract: A planter system includes a planter having an unloading valve and a controller. The unloading valve is fluidly coupled between an inlet and an outlet of a pump. The unloading valve is configured to receive a fluid at a supply pressure, to supply a first portion of the fluid from the inlet to a hydraulic planter system at an unloading pressure less than the supply pressure, and to recirculate a remainder of the fluid to the pump via the outlet. The controller is communicatively coupled to the unloading valve and to the pump. The controller is configured to control the pressure of the fluid supplied to the inlet and to control the unloading pressure of the first portion supplied to the hydraulic planter system.

Abstract: A parking brake system for a work vehicle may include an internal braking mechanism and an external brake actuator. The brake actuator may generally include a housing at least partially defining a rod-side chamber, a secondary chamber and a piston-side chamber extending between the rod-side and secondary chambers. The brake actuator may also include a primary piston movable between a first position at which the braking mechanism is actuated to an engaged state and a second position at which the braking mechanism is actuated to a disengaged state. In addition, the brake actuator may include a secondary piston at least partially housed within the secondary chamber that is configured to apply a force against the primary piston when fluid is supplied within the secondary chamber in order to move the primary piston from the first position to the second position.

Abstract: A parking brake system for a work vehicle may include an internal braking mechanism and an external brake actuator. The brake actuator may generally include a housing at least partially defining a rod-side chamber, a secondary chamber and a piston-side chamber extending between the rod-side and secondary chambers. The brake actuator may also include a primary piston movable between a first position at which the braking mechanism is actuated to an engaged state and a second position at which the braking mechanism is actuated to a disengaged state. In addition, the brake actuator may include a secondary piston at least partially housed within the secondary chamber that is configured to apply a force against the primary piston when fluid is supplied within the secondary chamber in order to move the primary piston from the first position to the second position.

Abstract: A planter system includes a planter having an unloading valve and a controller. The unloading valve is fluidly coupled between an inlet and an outlet of a pump. The unloading valve is configured to receive a fluid at a supply pressure, to supply a first portion of the fluid from the inlet to a hydraulic planter system at an unloading pressure less than the supply pressure, and to recirculate a remainder of the fluid to the pump via the outlet. The controller is communicatively coupled to the unloading valve and to the pump. The controller is configured to control the pressure of the fluid supplied to the inlet and to control the unloading pressure of the first portion supplied to the hydraulic planter system.

Abstract: A method for selectively charging and discharging a steering accumulator are provided. One vehicle steering system includes a hydraulic pump configured provide a source of pressurized hydraulic fluid for use in steering the vehicle. The steering system also includes an accumulator configured to hold pressurized hydraulic fluid from the pump for use in steering the vehicle in case of need. The steering system includes a charging circuit configured to selectively allow the hydraulic fluid to flow from the hydraulic pump to the accumulator based on a fluid pressure applied by a first pilot and a second pilot. The steering system includes a charging bypass circuit configured to allow the hydraulic fluid to flow to a steering control unit and to bypass the charging circuit. The hydraulic pump supplies fluid to the charging circuit and the bypass circuit.

Abstract: A system and method for selectively charging and discharging a steering accumulator are provided. One vehicle steering system includes a hydraulic pump configured provide a source of pressurized hydraulic fluid for use in steering the vehicle. The steering system also includes an accumulator configured to hold pressurized hydraulic fluid from the pump for use in steering the vehicle in case of need. The steering system includes a charging circuit configured to selectively allow the hydraulic fluid to flow from the hydraulic pump to the accumulator based on a fluid pressure applied by a first pilot and a second pilot. The steering system includes a charging bypass circuit configured to allow the hydraulic fluid to flow to a steering control unit and to bypass the charging circuit. The hydraulic pump supplies fluid to the charging circuit and the bypass circuit.

Abstract: A steering wheel movement sensing apparatus for an agricultural vehicle comprising a magnetic ring configured to fit around the steering column such that it turns in unison with the steering wheel. The minimum number of magnetic poles on the ring is not defined, but a ring having at least 36 poles enables the movement sensor to detect steering wheel movement of 10 degrees. At least two hall-effect sensors fixed in a stationary position adjacent to the magnetic ring generate signals of fluctuating value as the magnetic poles pass enabling wheel movement and the extent of wheel movement to be derived. By specifically adjusting the position of the hall-effect sensors in relation to each other, the resultant output signals can also be used to determine the direction of movement of the steering wheel. Outputs from the sensing apparatus can be used to disengage an automated vehicle guidance system upon detection of steering wheel movement and to provide input to a self-cancelling turn signal system.

Abstract: A steering wheel movement sensing apparatus for an agricultural vehicle comprising a magnetic ring configured to fit around the steering column such that it turns in unison with the steering wheel. The minimum number of magnetic poles on the ring is not defined, but a ring having at least 36 poles enables the movement sensor to detect steering wheel movement of 10 degrees. At least two hall-effect sensors fixed in a stationary position adjacent to the magnetic ring generate signals of fluctuating value as the magnetic poles pass enabling wheel movement and the extent of wheel movement to be derived. By specifically adjusting the position of the hall-effect sensors in relation to each other, the resultant output signals can also be used to determine the direction of movement of the steering wheel. Outputs from the sensing apparatus can be used to disengage an automated vehicle guidance system upon detection of steering wheel movement and to provide input to a self-cancelling turn signal system.