Embodiments of a work vehicle magnetorheological fluid (MRF) joystick system include a joystick device having a base housing, a joystick movably mounted to the base housing, and a joystick position sensor configured to monitor joystick movement. An MRF joystick resistance mechanism is controllable to vary a joystick stiffness resisting movement of the joystick relative to the base housing, while a controller architecture is coupled to the joystick position sensor and to the MRF joystick resistance mechanism. The controller architecture is configured to: (i) selectively place the work vehicle MRF joystick system in a modified joystick stiffness mode during operation of the work vehicle; and (ii) when the work vehicle MRF joystick system is placed in the modified joystick stiffness mode, command the MRF joystick resistance mechanism to vary the joystick stiffness based, at least in part, on the movement of the joystick relative to the base housing.

Provided is a work vehicle which can prevent an engine from stalling regardless of type of a system mounted on a vehicle body. In a wheel loader 1 equipped with a loading work device 11 operated by an electric operation lever 19, first and second directional control valves 5, 6 include neutral positions 5N, 6N for causing hydraulic oil discharged from a hydraulic pump 12 to return to a hydraulic oil tank 10, respectively, and in the case where a discharge pressure P of the hydraulic pump 12 is a main relief pressure Pr or more and an engine rotational speed N is less than a low idle rotational speed NL, a controller 2, 2A restricts the output of control signals to first and second solenoid control valves 3, 4 so as to cause the first and second directional control valves 5, 6 to be switched to the neutral positions 5N, 6N, respectively.

The invention is based on controlling operations of an earthmoving machine controllable by the operator by using only one to four controllers and at least one displaying means for displaying controls selectable and controllable by the one to four controllers. The selections and controls of the operations for controlling the earthmoving machine may be transmitted to the control unit both by wire and wirelessly. Thus, the one to four controllers are operable both attached and detached. Further, the control system is arranged to determine the location of the one to four controllers with respect to the earthmoving machine.

A shovel includes a lower traveling body, an upper turning body turnably mounted on the lower traveling body, a cabin mounted on the upper turning body, an operator's seat installed in the cabin, an operating lever installed in the cabin, and a switch installed in the cabin, where the switch is disabled when the operating lever is operated.

A system for controlling a machine may include a first joystick comprising a first asymmetric grip portion with a first asymmetric faceplate. The first asymmetric faceplate may comprise a first subset of primary controls that include a first plurality of input elements configured to control an operation of an implement mounted to the machine, and a first subset of secondary controls that include a second plurality of input elements configured to control an operation of a display device of the machine. The system may further include a second joystick comprising a second asymmetric grip portion with a second asymmetric faceplate. The second asymmetric faceplate may comprise a second subset of the primary controls that include a third plurality of input elements configured to control an operation of the implement, and a second subset of the secondary controls that include a fourth plurality of input elements configured to control a sound.

A hydraulic system for a working machine includes hydraulic actuators actuated with hydraulic fluid delivered from a hydraulic pump, and control valves each of which is shiftable among shift positions to control a flowrate of hydraulic fluid flowing to the corresponding hydraulic actuator. Each control valve includes an input port, an output port, and a flowrate reduction section. When the control valve is shifted to a reduction position, the flowrate reduction section reduces a flowrate of the hydraulic fluid entering the input port and outputs the flowrate-reduced hydraulic fluid to the output port. At least one of the control valves includes a flowrate increase section. When the control valve is shifted to an increase position, the flowrate increase section outputs the hydraulic fluid having entered the input port to the output port at a flowrate larger than that of hydraulic fluid output by the flowrate reduction section.

This construction machine comprises: includes a work machine; an automatic controller for automatically controlling the work machine according to design information; an operation lever for manually controlling the work machine; and an automatic switch mounted on the operation lever and alternatively switching between activation and deactivation of the automatic control. The manual control of the work machine has higher priority than the automatic control.

A manipulation system is provided that is used to guide an operator to manipulate a manipulation member. The manipulation system comprises a plurality of types of manipulation members manipulated by an operator of a work machine to operate the work machine, and a memory that stores model data for each type of manipulation member as a model in manipulating the manipulation members.

An assembly for a work machine comprises an operation lever comprising a first switch and a second switch, the first switch being activated and set for controlling the work machine and the second switch being deactivated at a point of factory shipment, a first port electrically coupled to the second switch of the operation lever, a second port coupled to a power source of the work machine, and a processing circuitry. The processing circuitry is configured to receive a request for setting an auxiliary device to the work machine from an input device, the auxiliary device being detachably attached to the work machine after the point of factory shipment; assign the first port to the second switch of the operation lever, to control the auxiliary device; assign the second port to the auxiliary device, to supply power to the auxiliary device; and set configuration information of the auxiliary device based on input information from the input device.

In embodiments, a work vehicle magnetorheological fluid (MRF) joystick system includes a joystick device, an MRF joystick resistance mechanism, and a controller architecture. The joystick device includes, in turn, a base housing, a joystick movably mounted to the base housing, and a joystick position sensor configured to monitor movement of the joystick relative to the base housing. The MRF joystick resistance mechanism is controllable to vary a first joystick stiffness resisting movement of the joystick relative to the base housing in at least one degree of freedom. The controller architecture is configured to: (i) detect when unintended joystick motion conditions occur during operation of the work vehicle; and (ii) when detecting unintended joystick motion conditions, command the MRF joystick resistance mechanism to increase the first joystick stiffness in a manner reducing susceptibility of the joystick device to unintended joystick motions.