US 11,952,748 B2
Work vehicle and control method for work vehicle
Akira Nakashima, Tokyo (JP)
Assigned to KOMATSU LTD., Tokyo (JP)
Appl. No. 17/276,936
Filed by KOMATSU LTD., Tokyo (JP)
PCT Filed Oct. 31, 2019, PCT No. PCT/JP2019/042818
§ 371(c)(1), (2) Date Mar. 17, 2021,
PCT Pub. No. WO2020/100615, PCT Pub. Date May 22, 2020.
Claims priority of application No. 2018-215803 (JP), filed on Nov. 16, 2018.
Prior Publication US 2022/0034069 A1, Feb. 3, 2022
Int. Cl. E02F 9/22 (2006.01); E02F 9/20 (2006.01); F16H 59/44 (2006.01); F16H 59/74 (2006.01); F16H 61/431 (2010.01); F16H 61/465 (2010.01); E02F 3/76 (2006.01); F16H 59/02 (2006.01); F16H 59/36 (2006.01); F16H 59/46 (2006.01)
CPC E02F 9/2253 (2013.01) [E02F 9/2066 (2013.01); E02F 9/2296 (2013.01); F16H 59/44 (2013.01); F16H 59/74 (2013.01); F16H 61/431 (2013.01); F16H 61/465 (2013.01); E02F 3/7613 (2013.01); E02F 3/7618 (2013.01); E02F 9/2228 (2013.01); E02F 9/2235 (2013.01); E02F 9/2285 (2013.01); F16H 59/02 (2013.01); F16H 2059/366 (2013.01); F16H 59/46 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A work vehicle comprising:
an engine;
a hydraulic pump driven by the engine;
a hydraulic motor driven by hydraulic fluid discharged from the hydraulic pump to travel the work vehicle; and
a controller for controlling a rotation speed of the engine and a displacement of the hydraulic pump,
the controller being configured to
acquire a tractive force of the vehicle; and
reduce the rotation speed of the engine in accordance with a reduction in the tractive force.