A system for maximizing productivity of a work vehicle is disclosed. The system includes a first sensor system that generates a first signal output indicative of a height of a material arranged forward of the work vehicle. A second sensor system generates a second signal output indicative of a position and height of a material transport blade coupled to the work vehicle. An actuator system configured to adjust the position and height of the material transport blade. An electronic data processor is communicatively coupled to each of the first sensor system, the second sensor system, and the actuator system. The electronic data processor determines a material flow rate based on the first and second signal outputs, and generates a command signal received by the actuator system to dynamically adjust a plurality of operating parameters associated with the material transport blade to maximize the material flow rate.

A control device for a power machine includes a target circuit pressure specifying unit configured to specify a target circuit pressure of the hydrostatic continuously variable transmission, a measurement value acquisition unit configured to acquire an actual circuit pressure of the hydrostatic continuously variable transmission, a brake torque determination unit configured to determine a brake torque based on the target circuit pressure and the actual circuit pressure, and a pump control unit configured to control the hydraulic pump based on the brake torque. The brake torque is a torque consumed by the hydraulic pump.

The invention relates to a load-handling vehicle (1) comprising a wheeled chassis (2) and, supported by said chassis (2),—an internal combustion engine (4),—a mechanism (5) for transmitting power from the internal combustion engine (4) to the wheels (3) of the chassis (2),—a bucket (7),—a system for moving said bucket (7),—a control unit (9),—an accelerator pedal (10),—a control member (11) which can be manually actuated by the driver of the vehicle,—a system (12) for detecting movements of the bucket (7). The power transmission mechanism (5) is configured so that a reduction in the rotational speed of the internal combustion engine (4) results in a reduction in the torque supplied to the wheels (3) of the chassis (2) and the vehicle (1) comprises at least one operating mode in which the control unit (9) is configured, in accordance with the data provided by the system (12) for detecting the movements of the bucket (7) and the control instructions of the system for moving the bucket (7), to reduce the rotational speed of the engine (4) to a value lower than the set value for speed control corresponding to the position of the accelerator pedal (10).

A hydraulic system for a work vehicle includes a hydraulic motor configured to generate rotational power for one or more wheels on the work vehicle. The hydraulic system also includes a hydraulic pump coupled to the hydraulic motor, wherein the hydraulic pump is configured to pump hydraulic fluid to the hydraulic motor. The hydraulic control system includes a processor that is configured to receive an input indicative of a selection of a number of speed ranges that span between a minimum speed and a maximum speed for the work vehicle and to provide a motor command to set a motor volume of the hydraulic motor and a pump command to set a limit for a pump volume of the hydraulic pump to enable the number of speed ranges for the work vehicle.

Provided is a wheel loader capable of moving up a lift arm in a short time during excavation work. A wheel loader comprises a controller configured to control maximum traction force of the wheel loader and input torque of a working device hydraulic pump, and include a specific condition determination section configured to determine whether a specific condition for specifying excavation work is satisfied, an elapsed time measurement section configured to measure an elapsed time from start of the excavation work, and an input torque control section configured to limit the input torque to a first input torque value when the specific condition is satisfied and increase the input torque from the first input torque value when a second set time elapses from the elapse of a first set time.

A propulsion control system includes a travel motor configured to be actuated to drive the track assembly in the forward and reverse travel directions; a propulsion control device actuated in first and second input directions; and a propulsion switching mechanism. In a first propulsion direction mode, when the control device is actuated in the first input direction, the travel motor is actuated to drive in the forward travel direction, and when the control device is actuated in the second input direction, the travel motor is actuated to drive in the reverse travel direction. In a second propulsion direction mode, when the control device is actuated in the first input direction, the travel motor is actuated to drive in the reverse travel direction, and when the control device is actuated in the second input direction, the travel motor is actuated to drive in the forward travel direction.

A working machine includes a machine body, a prime mover, a traveling device mounted on the machine body, a traveling motor to provide a power to the traveling device and to switch between a first speed and a second speed higher than the first speed, a traveling pump to be driven by the prime mover and to supply operation fluid to the traveling motor, and a controller device including an automatic shifter to automatically shift the traveling motor to the first speed or to the second speed, a timer to count an elapsed time from the automatically shifting, and a shift prohibitor to prohibit the automatically shifting by the automatic shifter when the elapsed time counted by the timer is less than a threshold.

A working machine includes a first traveling fluid line through which operation fluid applied to a first pressure receiving portion when a traveling operation member is operated, a second traveling fluid line through which operation fluid applied to a second pressure receiving portion when the traveling operation member is operated, a third traveling fluid line through which operation fluid applied to a third pressure receiving portion when the traveling operation member is operated, a fourth traveling fluid line through which operation fluid applied to a fourth pressure receiving portion when the traveling operation member is operated, and a controller configured or programed to judge, first, second, third and fourth pilot pressures, whether the traveling operation member is operated in a direction corresponding to any of spin-turn, pivotal-turn and straight-traveling.

A power transmission device includes an input shaft, an output shaft, a differential device, a continuously variable transmission unit, and a control device. The differential device includes a first rotation element connected to the input shaft, a second rotation element connected to the output shaft, and a third rotation element. The continuously variable transmission unit includes a conversion unit configured to convert rotational power of the third rotation element into an other power, and a reconversion unit configured to reconvert the converted other power into the rotational power and supply the reconverted rotational power to the output shaft. The control device includes a continuously variable transmission control unit configured to generate a control signal of the continuously variable transmission unit such that the other power generated by the conversion unit exceeds the other power input to the reconversion unit.

A loading machine for loading, hauling, and dumping material about a worksite includes a lifting implement pivotally joined to a machine frame to articulate with respect to a work surface. A lift sensor is operatively configured to measure vertical articulation of the lifting mechanism. An electronic controller communicating with the lift sensor can be programmed to operate the loading machine in one of a rated performance mode and a limited performance mode depending upon the vertical articulation of the lifting implement with respect to the work surface.