US 11,739,833 B2
Work vehicle and control method for work vehicle
Hiroaki Ikeda, Tokyo (JP); and Shinya Kawakita, Tokyo (JP)
Assigned to Komatsu Ltd., Tokyo (JP)
Appl. No. 17/611,967
Filed by Komatsu Ltd., Tokyo (JP)
PCT Filed Jun. 12, 2020, PCT No. PCT/JP2020/023274
§ 371(c)(1), (2) Date Nov. 17, 2021,
PCT Pub. No. WO2020/255893, PCT Pub. Date Dec. 24, 2020.
Claims priority of application No. 2019-114092 (JP), filed on Jun. 19, 2019.
Prior Publication US 2022/0235533 A1, Jul. 28, 2022
Int. Cl. F16H 61/04 (2006.01); F16H 61/438 (2010.01); F16H 61/439 (2010.01); F16H 47/04 (2006.01); F16H 61/20 (2006.01)
CPC F16H 61/0403 (2013.01) [F16H 47/04 (2013.01); F16H 61/438 (2013.01); F16H 61/439 (2013.01); F16H 2061/0481 (2013.01); F16H 2061/207 (2013.01); F16H 2312/09 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A work vehicle comprising:
an input shaft that is connected to an engine;
an output shaft that is connected to a traveling device;
a power transmission device that transmits power input to the input shaft to the output shaft via a clutch mechanism;
a forward-reverse operation device operated to change a state of the traveling device between a forward state, a neutral state, and a reverse state; and
a control device,
wherein the control device includes:
an operation signal acquisition unit that acquires an operation signal generated by an operation of the forward-reverse operation device;
a torque reduction command unit that outputs a torque reduction command for reducing a torque of the output shaft in a state where a first clutch among a plurality of clutches of the clutch mechanism is engaged, before a specified time elapses from a time point at which the operation signal for changing to the neutral state is acquired in a state where the first clutch is engaged;
a clutch control unit that outputs a release command for releasing the first clutch after the specified time elapses; and
a power control unit that outputs a control command for controlling the power transmission device so that a rotation speed of an input-side element of a second clutch to be engaged next coincides with a rotation speed of an output-side element of the second clutch in a state where the first clutch is released.