WORK VEHICLE - HITACHI CONSTRUCTION MACH CO

Title:

WORK VEHICLE

Document Type and Number:

WIPO Patent Application WO/2019/176888

Kind Code:

A1

Abstract:

The present invention improves fuel efficiency by shortening the adjustment time for the engine speed during gear-shifting. A control device (100): performs gear shift by releasing a lock-up clutch (C1) and a transmission clutch (C2) during a shift-up operation; when a first rotation speed (N1) on the output side of the transmission clutch is stepped down, reduces a third rotation speed (N3) on the input side of the transmission clutch so as to match the first rotation speed by causing a generator motor (7) to perform a regenerative operation; when the third rotation speed matches the first rotation speed, engages the transmission clutch and reduces a second rotation speed (N2) of an output shaft of an engine (1) so as to match the first rotation speed, by causing a generator (5) to perform a regenerative operation; and engages the lock-up clutch in the case when the first rotation speed, second rotation speed, and third rotation speed match with each other and when the torque of the engine is greater than that of the generator motor.

Inventors:

KAMIYA AKINORI (JP)
KANEKO SATORU (JP)
ITO NORITAKA (JP)
UTASHIRO HIROSHI (JP)
TAKADA TOMONORI (JP)
SEKINO SATOSHI (JP)
TOKUDA KATSUHIKO (JP)

Application Number:

PCT/JP2019/009827

Publication Date:

September 19, 2019

Filing Date:

March 11, 2019

Export Citation:

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Assignee:

HITACHI CONSTRUCTION MACH CO (JP)

International Classes:

B60W20/00; B60K6/387; B60K6/442; B60W10/02; B60W10/08; B60W10/10; E02F9/22; F16H59/46; F16H61/02; F16H61/21; F16H61/682; F16H63/46; F16H63/50

Foreign References:

JP2008074197A	2008-04-03
JP2000074202A	2000-03-14
JP2017109552A	2017-06-22
JP2016104927A	2016-06-09
JP2002120602A	2002-04-23
JP2004150450A	2004-05-27
JPH02157437A	1990-06-18