WORK VEHICLE AND CONTROL METHOD FOR WORK VEHICLE

Title:

WORK VEHICLE AND CONTROL METHOD FOR WORK VEHICLE

Document Type and Number:

WIPO Patent Application WO/2020/255892

Kind Code:

A1

Abstract:

A work vehicle equipped with: a power transmission device having a hydraulic transmission mechanism that includes a first hydraulic pump motor and a second hydraulic pump motor and that transmits power that has been input to an input shaft to an output shaft via a clutch mechanism; and a control device. The control device has: a clutch control unit for outputting a clutch command for causing a specified clutch among a plurality of clutches in the clutch mechanism to engage, on the basis of a speed ratio indicating the ratio of the rotation speed of the input shaft and the rotation speed of the output shaft; a storage unit for storing correlation data indicating a relationship between the speed ratio and the capacity of the first hydraulic pump motor and the capacity of the second hydraulic pump motor; and a power control unit for outputting a capacity command for changing the capacity of the first hydraulic pump motor and/or the capacity of the second hydraulic pump motor, on the basis of the speed ratio and the correlation data. The correlation data is set such that, in a prescribed speed ratio region between a first speed ratio and a second speed ratio that is higher than the first speed ratio, both the capacity of the first hydraulic pump motor and the capacity of the second hydraulic pump motor change in conjunction with a change in the speed ratio.

Inventors:

MIYAZAKI SHOGO (JP)
TAKENO AKIRA (JP)

Application Number:

PCT/JP2020/023273

Publication Date:

December 24, 2020

Filing Date:

June 12, 2020

Export Citation:

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Assignee:

KOMATSU MFG CO LTD (JP)

International Classes:

F16H47/04

Foreign References:

JP2009138819A	2009-06-25
US3204486A	1965-09-07
JP2014206271A	2014-10-30
JP2009036299A	2009-02-19
JP2006329244A	2006-12-07

Other References: