A second frame is turnably connected to a first frame. A steering cylinder is connected to the second frame and the first frame. The steering cylinder causes the second frame to turn with respect to the first frame. A hydraulic pump supplies hydraulic fluid to the steering cylinder. An engine drives the hydraulic pump. A steering operating member is operable by an operator. A steering operation sensor outputs a steering command signal corresponding to an operation of the steering operating member. A controller controls a flow rate of the hydraulic fluid supplied from the hydraulic pump to the steering cylinder by controlling a rotation speed of the engine in accordance with the steering command signal.

Provided is a wheel loader capable of exhibiting sufficient excavation performance while suppressing slip during excavation. A control device provided on a wheel loader according to the present invention is configured to determine a reduction value (Δf′) of traveling drive force based on first vehicle body acceleration (av1) of a vehicle body calculated from acceleration detected by an acceleration sensor, second vehicle body acceleration (av2) of the vehicle body calculated from rotational speed of wheels detected by a rotational speed sensor, and thrust (ph) of a hydraulic cylinder detected by a thrust sensor, and reduce the traveling drive force based on the reduction value and output the reduced traveling drive force.

An apparatus for facilitating bucket movement of a material handling machine includes a joystick biased to a neutral position, movable away from the neutral position in a first direction along an axis to a first position, and movable away from the neutral position in a second direction along the axis, opposite the first direction, to a second position. The apparatus further includes an operator input movable from a disengaged position to an engaged position in which a bucket of the material handling machine is configured to automatically move in an oscillatory motion. When the operator input is in the engaged position, an intensity of the oscillation is dependent upon a position of the joystick along the axis, decreasing along the axis from the first position to the second position.

A hydraulic system for a machine includes an implement pump, a valve, and an implement valve subsystem. The implement pump includes a load sensing control, and the valve controls the flow of hydraulic fluid to the implement pump. The implement valve subsystem includes one or more implement control subsystems to control movement of an implement. The valve is an electrohydraulic proportional relief valve and includes a solenoid configured to adjust the pressure of hydraulic fluid delivered to the implement pump proportionally to a current delivered through the solenoid.

A hydraulic system includes a first and a second rotating hydraulic machine, the first and second hydraulic machine being arranged to provide a torque via a common output shaft; a first valve arrangement for providing a differential hydraulic pressure level over the first hydraulic machine by using two sources of hydraulic fluid having different hydraulic pressure levels, a second valve arrangement for providing a differential hydraulic pressure level over the second hydraulic machine by using two sources of hydraulic fluid having different hydraulic pressure levels; and a control unit configured to control the first valve arrangement and the second valve arrangement such that different discrete levels of torque are provided via the output shaft of the hydraulic system. A hydraulic system for providing different discrete levels of torque using one hydraulic machine and a plurality of differential pressure levels, and a method for controlling a hydraulic system, are also provided.

A controller may receive, from a sensor device, machine velocity data indicating a velocity of a machine controlled by a remote control device. The controller may determine, based on the machine velocity data, a distance to be traveled by the machine until the machine stops traveling after a communication, between the machine and the remote control device, is interrupted. The controller may generate, based on the distance, an overlay to indicate the distance. The controller may provide the overlay, for display, with a video feed of an environment surrounding the machine.

A stability control system identifies an actionable condition, such as instability, in an off-road mobile machine, based upon an in-rubber tire sensor. A remedial action is identified, and a control signal is generated to control the mobile machine to take the remedial action.

A hydraulic system for controlling an implement on a work machine may include a hydraulic reservoir, a hydraulic pump in fluid communication with the reservoir, a central valve in fluid communication with the pump and configured for controlling the implement, a load sense pressure relief system, and a controller. The controller may be configured for controlling the central valve and the load sense pressure relief system and selecting between operating the hydraulic system at a first pressure and a second pressure based on a factor relating to implement position.

A method is provided for visually representing areas of interest associated with and/or proximate a work vehicle which includes a first portion (e.g., frame) and a second portion (e.g., work implement) moveable relative thereto, wherein for example a first area of interest comprising terrain proximate a ground-engaging work tool is obscured from direct operator view. An imaging device is mounted on the work vehicle and has a field of view including the first area of interest at least while the tool is proximate a ground-engaging position. Selections may accordingly be made from among various areas of interest, wherein image display parameters associated with perimeter contours of the selected area of interest are substantially maintained throughout movement of the second portion. For example, display parameters corresponding to the first area of interest may be maintained while the tool and the imaging device move relative thereto.

A wheel loader includes: a front frame; a bucket; a boom having a distal end connected to bucket, and a proximal end rotatably supported by front frame; a sensor configured to measure a distance between boom and a loading target; and a controller configured to control an action of wheel loader. The controller causes wheel loader to perform a predetermined action for collision avoidance on condition that a distance to be measured by sensor when wheel loader travels takes a value less than or equal to a threshold value.