Title:
DAMPER OPERATION CONTROL DEVICE FOR A WORK VEHICLE, AND DAMPER OPERATION CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2011/108550
Kind Code:
A1
Abstract:
The disclosed damper operation control device is provided with a boom swingably supported by the vehicle body, a bucket swingably supported on the end of the aforementioned boom, a lift cylinder (118) which drives the aforementioned boom, an accumulator (117) connected to the lift cylinder (118) via a branched oil passage (146a), a switching valve (115) which, connected on the branched oil passage (146a) between the lift cylinder (118) and the accumulator (117), switches between a connected state and a disconnected state in which the lift cylinder (118) and the accumulator (117) are connected or disconnected, respectively, and a controller (111) which performs switching control of the switching valve (115a). The controller (111) is provided with a state detection unit for detecting whether or not the aforementioned bucket is in a loading state, and a switching valve control unit which, if the aforementioned state detection unit detects that said bucket is in a load state, switches the switching valve (115a) to the connected state. By this means, efficient use of power generated by a hydraulic pump (141) can be achieved, and also a reduction of loads falling off and a more comfortable ride are realized.
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Inventors:
WADA, Minoru (Komatsu Ltd. 163-46, Nagasuna, Hitachinaka-sh, Ibaraki 04, 〒3120004, JP)
和田 稔 (〒04 茨城県ひたちなか市長砂１６３－４６ 株式会社小松製作所 茨城工場内 Ibaraki, 〒3120004, JP)
和田 稔 (〒04 茨城県ひたちなか市長砂１６３－４６ 株式会社小松製作所 茨城工場内 Ibaraki, 〒3120004, JP)
Application Number:
JP2011/054653
Publication Date:
September 09, 2011
Filing Date:
March 01, 2011
Export Citation:
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)
WADA, Minoru (Komatsu Ltd. 163-46, Nagasuna, Hitachinaka-sh, Ibaraki 04, 〒3120004, JP)
株式会社小松製作所 (〒14 東京都港区赤坂２－３－６ Tokyo, 〒1078414, JP)
WADA, Minoru (Komatsu Ltd. 163-46, Nagasuna, Hitachinaka-sh, Ibaraki 04, 〒3120004, JP)
International Classes:
E02F9/22
Attorney, Agent or Firm:
SAKAI, Hiroaki (Sakai International Patent Office, Kasumigaseki Building 2-5, Kasumigaseki 3-chome, Chiyoda-k, Tokyo 20, 〒1006020, JP)
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Claims: