US 12,312,003 B2
Work vehicle and method for controlling work vehicle
Daiki Abe, Sakai (JP); Ryota Hamamoto, Sakai (JP); and Yuki Bunryo, Sakai (JP)
Assigned to KUBOTA CORPORATION, Osaka (JP)
Filed by Kubota Corporation, Osaka (JP)
Filed on Jun. 20, 2022, as Appl. No. 17/844,071.
Claims priority of application No. 2021-129066 (JP), filed on Aug. 5, 2021; and application No. 2022-071652 (JP), filed on Apr. 25, 2022.
Prior Publication US 2023/0044116 A1, Feb. 9, 2023
Int. Cl. B62D 11/04 (2006.01); B62D 11/00 (2006.01); E02F 9/22 (2006.01)
CPC B62D 11/04 (2013.01) [B62D 11/005 (2013.01); E02F 9/225 (2013.01); E02F 9/2292 (2013.01); E02F 9/2296 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A method for controlling a work vehicle, comprising:
driving a first hydraulic pump and a second hydraulic pump by an engine of the work vehicle to supply hydraulic fluid to a first hydraulic motor and a second hydraulic motor, respectively, to drive a first traveling device and a second traveling device, respectively, to advance the work vehicle, the first traveling device and the second traveling device facing each other;
detecting an operation state of a direction input device to operate a traveling direction of the work vehicle;
determining whether or not a traveling state of the work vehicle is a turning state based on the operation state that is detected;
outputting a rotation command to decrease a target rotational speed of the engine from a first rotational speed to a second rotational speed when it is determined that the traveling state is the turning state; and
controlling pilot pressures of pilot oil supplied to the first hydraulic pump and the second hydraulic pump to be target pilot pressures, displacement volumes of the first hydraulic pump and the second hydraulic pump to which the target pilot pressures are applied respectively being maximized when substantially no load is applied to the first hydraulic motor and the second hydraulic motor.