Abstract: A power determination unit determines a target power generation amount of a fuel cell, based on a time series of measurement values relating to power while a work vehicle travels along a predetermined travel route. A fuel cell control unit controls the fuel cell to output the target power generation amount while the work vehicle travels along the travel route. A battery control unit controls charging or discharging of a battery, based on a difference between required power required for driving the work vehicle and the target power generation amount while the work vehicle travels along the travel route.

Abstract: A boom is attached to a machine main body. A bucket is attached to the boom. A boom cylinder is attached to the machine main body and drives the boom. A bucket cylinder is attached to the machine main body and drives the bucket with respect to the boom. A controller calculates a mass of a load within the bucket based on boom cylinder force and bucket cylinder force.

Abstract: A route determination unit determines a traveling route of a work vehicle on a work site. An electric power determination unit determines a target electric power generation of a fuel cell during traveling on the traveling route based on topography of the traveling route. The work vehicle controls the fuel cell such that the target electric power generation is output during traveling on the traveling route and controls charging or discharging of a battery based on a difference between required electric power needed for driving the work vehicle and the target electric power generation.

Abstract: A load ratio determination unit determines a load ratio of each of a plurality of fuel cells based on desired electric power of a work machine. An operation instruction unit operates each of the plurality of fuel cells at the determined load ratio.

Abstract: A work vehicle includes a fuel cell, a fuel-cell DCDC converter that adjusts the voltage output from the fuel cell, a battery, a battery DCDC converter that adjusts the voltage output from the battery, and a vehicle body that supports the fuel cell, the fuel-cell DCDC converter, the battery, and the battery DCDC converter. The fuel cell is disposed in the vehicle body in front of the fuel-cell DCDC converter, the battery, and the battery DCDC converter.

Abstract: An electric power amount calculation unit calculates, based on a travel route of a work vehicle at a work site and generated electric power from a fuel cell, a required electric power amount of a battery for traveling on the travel route. An instruction unit instructs, in a case where the remaining capacity of the battery falls below the required electric power amount, the work vehicle to stand by until the remaining capacity of the battery is charged to be equal to or more than the required electric power amount by the generated electric power of the fuel cell.

Abstract: A work machine includes a boom, a work tool configured to drive with respect to the boom, an actuator configured to drive the work tool, a sub-link attached to the boom, and a control section. The sub-link is configured to transmit driving force of the actuator to the work tool. The control section is configured to control the actuator based on a posture of the sub-link with respect to the boom. A method of controlling a work machine includes controlling an actuator based on a posture of a sub-link with respect to a boom, the sub-link being configured to transmit driving force of the actuator to a work tool configured to drive with respect to the boom.

Abstract: A hydraulic excavator includes a vehicular body, a boom bottom pin supported by the vehicular body, a boom rotatably coupled to the vehicular body by the boom bottom pin, a boom top pin attached to a tip end of the boom, an arm rotatably coupled to the boom by the boom top pin, an arm top pin attached to a tip end of the arm, and a bucket rotatably coupled to the arm by the arm top pin. The computing device calculates a weight of a load conveyed by a work implement based on any two equilibrium equations of an equation of moment equilibrium around the boom bottom pin, an equation of moment equilibrium around the boom top pin, and an equation of moment equilibrium around the arm top pin.

Abstract: A boom is attached to a machine main body. A bucket is attached to the boom. A boom cylinder is attached to the machine main body and drives the boom. A bucket cylinder is attached to the machine main body and drives the bucket with respect to the boom. A controller calculates a mass of a load within the bucket based on boom cylinder force and bucket cylinder force.

Abstract: A running wheel is attached to a machine main body. A boom is attached to the machine main body. A bucket is attached to the boom. A boom cylinder is attached to the machine main body and drives the boom. A controller calculates a mass of a load within the bucket based on boom cylinder force of the boom cylinder and a ground acceleration of a wheel loader.

Abstract: 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.

Abstract: A work machine includes a main body, a boom to drive with respect to the main body, a work tool connecting to the boom, the work tool to drive with respect to the boom, an actuator connecting to the main body and the work tool, the actuator to drive the work tool, and a sub-link to transmit drive of the actuator to the work tool. A method for calibrating the work machine includes outputting a detection value to detect an angle of the sub-link with respect to the boom in a predetermined posture of the boom and a work tool posture, converting the detection value as a measurement angle of the sub-link with respect to the boom based on a conversion value, and calibrating the conversion value based on a relationship between the measurement angle and an actual angle in the work tool posture which is specified.

Abstract: A wheel loader includes a vehicle body, a work implement, a bucket-to-ground angle detection section, and a control section. The work implement operates with respect to the vehicle body and includes a bucket or a fork. The bucket-to-ground angle detection section detects information on a tilt angle of the bucket or the fork with respect to a gravity direction. The control section controls the tilt angle of the bucket or the fork with respect to the gravity direction based on a detection value of the bucket-to-ground angle detection section.

Abstract: A load in a bucket is weighed accurately in a short time period. A work machine includes a bucket and a controller. The controller determines a period in which a parameter related to a load weight in the bucket fluctuates with respect to time. The controller averages load weights at a plurality of time points within the period to calculate an average load weight.

Abstract: A load in a bucket is accurately weighed. A work machine includes a work implement, an input receiving unit, and a controller. The work implement includes a bucket. The input receiving unit receives a weighing start input for starting to weigh the load in the bucket. When the input receiving unit receives the weighing start input, the controller determines whether an automatic weighing start condition is satisfied or not. The automatic weighing start condition includes a condition that the work implement is not performing an excavation work. When the automatic weighing start condition is satisfied, the controller controls an operation of the work implement to weigh the load in the bucket.

Abstract: A work machine includes a boom, a work tool configured to drive with respect to the boom, an actuator configured to drive the work tool, a sub-link attached to the boom, and a control section. The sub-link is configured to transmit driving force of the actuator to the work tool. The control section is configured to control the actuator based on a posture of the sub-link with respect to the boom. A method of controlling a work machine includes controlling an actuator based on a posture of a sub-link with respect to a boom, the sub-link being configured to transmit driving force of the actuator to a work tool configured to drive with respect to the boom.

Abstract: A work machine includes a main body, a boom to drive with respect to the main body, a work tool connecting to the boom, the work tool to drive with respect to the boom, an actuator connecting to the main body and the work tool, the actuator to drive the work tool, and a sub-link to transmit drive of the actuator to the work tool. A method for calibrating the work machine includes outputting a detection value to detect an angle of the sub-link with respect to the boom in a predetermined posture of the boom and a work tool posture, converting the detection value as a measurement angle of the sub-link with respect to the boom based on a conversion value, and calibrating the conversion value based on a relationship between the measurement angle and an actual angle in the work tool posture which is specified.

Abstract: 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.