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Patent Searching and Data


Title:
APPARATUS AND METHOD FOR AUTOMATICALLY CONTROLLING A TRANSMISSION OF A WHEEL LOADER
Document Type and Number:
WIPO Patent Application WO/2012/087086
Kind Code:
A3
Abstract:
The present invention relates to a method for automatically controlling a transmission of a wheel loader, and more particularly, to an automatic control method for automatically performing a kickdown operation in a specific stage such as excavation among a plurality of work stages of the wheel loader. To this end, the method comprises: a step in which a transmission controller receives various information from a sensor of a transmission; a step in which the transmission controller receives bucket position information from a boom angle sensor; and a step of performing an automatic kickdown transmission from shift stage 2 to shift stage 1 when the information received in the previous step satisfies a predetermined condition. Thus, when the wheel loader brakes for excavation, an automatic kickdown transmission is performed with conditions of low engine RPM, low load and low travel speed and a condition in which the position of a bucket is adjacent to the ground, and accordingly, excavation starts at the state where the transmission is shifted to the shift stage 1 in advance, thereby improving work efficiency.

Inventors:
JANG IN PYO (KR)
Application Number:
PCT/KR2011/010126
Publication Date:
October 11, 2012
Filing Date:
December 26, 2011
Export Citation:
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Assignee:
DOOSAN INFRACORE CO LTD (KR)
JANG IN PYO (KR)
International Classes:
F16H59/66; E02F9/20
Foreign References:
JPH06129519A1994-05-10
KR20080018990A2008-02-29
KR20080077044A2008-08-21
US4800660A1989-01-31
Other References:
See also references of EP 2657576A4
Attorney, Agent or Firm:
KIM, Kee-Hyo (Kukdong Building 60-1,Chungmuro3-ka, Chung-ku, Seoul 100-705, KR)
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Claims: