Title:
WORK VEHICLE
Document Type and Number:
WIPO Patent Application WO/2019/188049
Kind Code:
A1
Abstract:
Provided is a work vehicle wherein, with regard to a lockup release operation, the determination of a condition in which the load increases during operation of the vehicle can be made with a small number of sensors. When an input shaft (47a) and an output shaft (47b) of a torque converter (47) are coupled by means of a lockup device 46, a negative control pressure detected by a second pressure detector (74) is equal to or less than a prescribed threshold value, and the rotation speed of an engine 41 as detected by an engine rotation speed detector (62) is equal to or less than a prescribed threshold value, a vehicle body controller (61) releases the connection of a lockup device 46, thereby releasing the coupling of the input shaft (47a) and the output shaft (47b).
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Inventors:
NAITOU KEISUKE (JP)
KAMIYA JUMPEI (JP)
KAMIYA JUMPEI (JP)
Application Number:
PCT/JP2019/008663
Publication Date:
October 03, 2019
Filing Date:
March 05, 2019
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
F16H61/14; F16H61/02
Domestic Patent References:
| WO2010147121A1 | 2010-12-23 |
Foreign References:
| JP2011169347A | 2011-09-01 | |||
| JP2016114142A | 2016-06-23 | |||
| JP2015137474A | 2015-07-30 | |||
| JP2014181511A | 2014-09-29 | |||
| JP2017178142A | 2017-10-05 |
Attorney, Agent or Firm:
THE PATENT BODY CORPORATE TAKEWA INTERNATIONAL PATENT OFFICE (JP)
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