Techniques for generating earthmoving flow vectors for assisting control of a construction machine are disclosed. A design elevation map of an earthmoving site may be obtained. The design elevation map may include a plurality of design elevation points of the earthmoving site. An actual elevation map of the earthmoving site may be obtained. The actual elevation map may include a plurality of actual elevation points of the earthmoving site. A dual-layer input graph may be formed based on the design elevation map and the actual elevation map. The dual-layer input graph may include a plurality of nodes related through a plurality of connections. A flow graph may be generated by solving the dual-layer input graph. The flow graph may include a set of flow vectors indicating movement of the earth within the earthmoving site.

Provided is a work vehicle capable of satisfying a user's demand to brake performance in a flexible manner. A wheel loader 1 comprises a controller 5 storing a plurality of control characteristics each of which is set such that a brake valve control pressure Pi of a solenoid proportional valve 45 increases as a pedal angle θ of a brake pedal 43 increases, and under the condition where a pedal angle θ is equal to or less than a predetermined pedal angle θ, an increase rate of the brake valve control pressure Pi with respect to the pedal angle θ varies. In a case where the pedal angle θ detected by a potentiometer 33 is equal to or less than the predetermined pedal angle θth, the controller 5, calculates the brake valve control pressure Pi based on the selected one control characteristic.

A hydraulic system of a construction machine includes: control valves interposed between a main pump and hydraulic actuators; and first solenoid proportional valves connected to pilot ports of the control valves. The hydraulic system further includes: a relief valve for the main pump, the relief valve including a pilot port; and a second solenoid proportional valve connected to the pilot port of the relief valve by a secondary pressure line and connected to an auxiliary pump by a primary pressure line. A switching valve including a pilot port connected to the secondary pressure line by a pilot line is interposed between the auxiliary pump and the first solenoid proportional valves.

A hydraulic system of a construction machine includes: control valves interposed between a main pump and hydraulic actuators; and first solenoid proportional valves connected to pilot ports of the control valves. The hydraulic system further includes: an unloading valve including a pilot port; and a second solenoid proportional valve connected to the pilot port of the unloading valve by a secondary pressure line and connected to an auxiliary pump by a primary pressure line. A switching valve including a pilot port connected to the secondary pressure line by a pilot line is interposed between the auxiliary pump and the first solenoid proportional valves.

A hydraulic system of a construction machine includes: control valves interposed between a main pump and hydraulic actuators; and first solenoid proportional valves connected to pilot ports of the control valves. The hydraulic system further includes: an unloading valve including a pilot port; and a second solenoid proportional valve connected to the pilot port of the unloading valve by a secondary pressure line and connected to an auxiliary pump by a primary pressure line. A switching valve including a pilot port connected to the secondary pressure line by a pilot line is interposed between the auxiliary pump and the first solenoid proportional valves.

A control device for a power machine can be configured to determine an operating temperature of a power machine and to derate one or more electrical actuators of the power machine to limit regenerative charging to the electrical power source. A method of operating a power machine can include controlling one or more electrical actuators, with a control device, to cause an implement of a power machine to fluctuate in orientation over a plurality of cycles, based on receiving an operator input that initiates the fluctuation or detecting an operational condition of the power machine.

On detection of a difference between the operation amount detected by a first sensor and the operation amount received by a first communication unit from a slave, a master side controller executes at least one of stop control to automatically stop a construction machine and alarm control to cause a warning device to issue an alarm. On detection of a difference between the operation amount detected by a second sensor and the operation amount received by a communication unit from the master, a slave side controller executes at least one of the stop control to automatically stop the construction machine and the alarm control to cause the warning device to issue the alarm.

A process, system and device for monitoring a ground engaging tool secured to earth working equipment that includes capturing an image of the ground engaging tool secured to the earth working equipment and subjected to wearing with a mobile device, determining a dimension of the ground engaging tool subject to wear, operating at least one processor and memory storing computer-executable instructions to calculate at least one result including the extent of wear experienced by the ground engaging tool and/or an estimate of when the ground engaging tool will reach a fully worn condition, and/or schedule when to replace the ground engaging tool.

A system includes a plurality of work machines, a communication device, an operating device, and a controller. The plurality of work machines are able to operate automatically. The plurality of work machines include a first work machine and a second work machine. The communication device communicates wirelessly with the plurality of work machines. The operating device transmits an operation signal to the plurality of work machines via the communication device. The operating device is able to operate the plurality of work machines remotely and individually. The controller disables the operation of the operating device on the first work machine when the first work machine and the second work machine are operating automatically.

To provide a hybrid wheel loader capable of reliably detecting a short-circuited state of a synchronous generator driven by a drive source. The present invention is provided with an MG 4 being a synchronous generator driven as an electric generator by an engine and operated as a motor by the electric power supplied from an electrical storage device 9, an MG inverter 5 having a motor current sensor 5d for detecting motor current flowing through the MG 4 and semiconductor switches 5a, 5b, and an HCU 10 for detecting a short-circuited state of the MG 4, wherein the HCU 10 determines that the MG 4 is in a short-circuited state when the semiconductor switches 5a, 5b of the MG inverter 5 are in an OFF state at gates and when the motor current detected by the motor current sensor 5d is equal to or greater than a specified threshold value.