US 11,953,091 B2
Control device of power transmission device, power transmission device, and control method for power transmission device
Shogo Miyazaki, Tokyo (JP); Shinya Kawakita, Tokyo (JP); and Kenichi Yamada, Tokyo (JP)
Assigned to KOMATSU LTD., Tokyo (JP)
Appl. No. 17/603,713
Filed by KOMATSU LTD., Tokyo (JP)
PCT Filed Jun. 8, 2020, PCT No. PCT/JP2020/022470
§ 371(c)(1), (2) Date Oct. 14, 2021,
PCT Pub. No. WO2020/250845, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 2019-111524 (JP), filed on Jun. 14, 2019.
Prior Publication US 2022/0196148 A1, Jun. 23, 2022
Int. Cl. F16H 61/475 (2010.01); F16H 61/00 (2006.01); F16H 61/4017 (2010.01); F16H 3/72 (2006.01)
CPC F16H 61/475 (2013.01) [F16H 61/0021 (2013.01); F16H 61/4017 (2013.01); F16H 3/727 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A control device of a power transmission device that includes
an input shaft,
an output shaft,
a differential device including
a first rotation element connected to the input shaft,
a second rotation element connected to the output shaft, and
a third rotation element, and
a continuously variable transmission unit including
a conversion unit configured to convert a first rotational power of the third rotation element into a first other power and
a reconversion unit configured to reconvert a second other power into a second rotational power and supply the second rotational power to the output shaft,
the control device comprising:
a continuously variable transmission control unit configured to
determine whether a target traction force of the output shaft is larger than a traction force that the power transmission device is capable of exerting, and
upon determining that the target traction force is larger than the traction force that the power transmission device is capable of exerting, generate a control signal of the continuously variable transmission unit such that the first other power generated by the conversion unit exceeds the second other power input to the reconversion unit.