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Title:
CONTROL DEVICE FOR HYDROSTATIC TRANSMISSION VEHICLE
Document Type and Number:
WIPO Patent Application WO/2010/070962
Kind Code:
A1
Abstract:
The desired vehicle speed can be reached and lower fuel consumption can be achieved in a vehicle provided with a HST.  A control device is used in a vehicle which is provided with a hydrostatic transmission and can be driven with the engine rotation speed set to a high idle rotation speed and an arbitrarily defined rotation speed lower than the high idle rotation speed by a fuel adjustment lever.  The control device is provided with a shift-up/shift-down button sensor, a vehicle speed setting unit, a low-rotation matching rotation speed setting unit, and a hydrostatic transmission pump/motor capacity control unit.  The shift-up/shift-down button sensor detects the gear stage indicated by an operator.  The vehicle speed setting unit sets the vehicle speed to a vehicle speed corresponding to the indicated gear stage.  The low-rotation matching rotation speed setting unit sets the engine rotation speed to a predetermined partial rotation speed when the set vehicle speed is within a preset low-/medium-speed range.  The pump/motor capacity control unit controls the respective capacities of a variable capacity pump and a variable capacity hydraulic motor on the basis of the set vehicle speed.

Inventors:
ISHIBASHI, Eiji (Tsu 23 Futsu-machi, Komatsu-sh, Ishikawa 92, 〒9230392, JP)
石橋 永至 (〒92 石川県小松市符津町ツ23 株式会社小松製作所粟津工場内 Ishikawa, 〒9230392, JP)
MUKAINO, Masayuki (Tsu 23 Futsu-machi, Komatsu-sh, Ishikawa 92, 〒9230392, JP)
迎野 雅行 (〒92 石川県小松市符津町ツ23 株式会社小松製作所粟津工場内 Ishikawa, 〒9230392, JP)
YAMAMOTO, Shigeru (3-1-1 Ueno Hirakata-sh, Osaka 11, 〒5731011, JP)
Application Number:
JP2009/066746
Publication Date:
June 24, 2010
Filing Date:
September 28, 2009
Export Citation:
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Assignee:
KOMATSU LTD. (2-3-6, Akasaka Minato-k, Tokyo 14, 〒1078414, JP)
株式会社小松製作所 (〒14 東京都港区赤坂2-3-6 Tokyo, 〒1078414, JP)
ISHIBASHI, Eiji (Tsu 23 Futsu-machi, Komatsu-sh, Ishikawa 92, 〒9230392, JP)
石橋 永至 (〒92 石川県小松市符津町ツ23 株式会社小松製作所粟津工場内 Ishikawa, 〒9230392, JP)
MUKAINO, Masayuki (Tsu 23 Futsu-machi, Komatsu-sh, Ishikawa 92, 〒9230392, JP)
迎野 雅行 (〒92 石川県小松市符津町ツ23 株式会社小松製作所粟津工場内 Ishikawa, 〒9230392, JP)
International Classes:
F16H61/42; F16H59/24; F16H59/42; F16H59/44
Domestic Patent References:
WO2008123376A1
Foreign References:
JP2008180275A
JP2004169569A
JPH04271704A
JPH023547A
JP2007092908A
JPH05338474A
JPH02199367A
Attorney, Agent or Firm:
SHINJYU GLOBAL IP (South Forest Bldg, 1-4-19 Minamimori-machi, Kita-ku, Osaka-sh, Osaka 54, 〒5300054, JP)
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