US 12,454,812 B2
Work machine and method for controlling work machine
Kazumichi Okajima, Tokyo (JP)
Assigned to KOMATSU LTD., Tokyo (JP)
Appl. No. 18/578,414
Filed by KOMATSU LTD., Tokyo (JP)
PCT Filed Jun. 15, 2022, PCT No. PCT/JP2022/023974
§ 371(c)(1), (2) Date Jan. 11, 2024,
PCT Pub. No. WO2023/002782, PCT Pub. Date Jan. 26, 2023.
Claims priority of application No. 2021-120722 (JP), filed on Jul. 21, 2021.
Prior Publication US 2024/0384508 A1, Nov. 21, 2024
Int. Cl. E02F 9/20 (2006.01); E02F 9/08 (2006.01); F01P 3/18 (2006.01)
CPC E02F 9/2095 (2013.01) [E02F 9/0866 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A work machine comprising:
a power feeding device;
a plurality of electric devices driven by power supply from the power feeding device;
a sensor that detects consumption current of the electric device;
a cooling fan that is driven by power supply from the power feeding device and generates a flow of air;
a heating source that generates heat and is cooled by the cooling fan; and
a controller that controls the cooling fan,
wherein the electric device includes a first device in which the sensor is provided,
the controller determines whether a sum of a consumption current of the electric device, including a consumption current of the first device detected by the sensor and a consumption current of the cooling fan, exceeds an output current of the power feeding device, and
the controller limits output of the heating source in a case where the sum of the consumption current of the electric device and the consumption current of the cooling fan exceeds the output current of the power feeding device as a result of the determination.
 
6. A method for controlling a work machine, the work machine including:
a power feeding device;
a plurality of electric devices driven by power supply from the power feeding device;
a sensor that detects consumption current of the electric device;
a cooling fan that is driven by power supply from the power feeding device and generates a flow of air; and
a heating source that generates heat and is cooled by the cooling fan,
wherein the electric device includes a first device in which the sensor is provided,
the method comprising:
detecting a consumption current of the first device by the sensor;
calculating a sum of a consumption current of the electric device including the consumption current of the first device detected by the sensor and a consumption current of the cooling fan;
determining whether the calculated sum of the consumption currents exceeds an output current of the power feeding device; and
limiting output of the heating source in a case where the sum of the consumption current of the electric device and the consumption current of the cooling fan exceeds the output current of the power feeding device as a result of the determination.