Title:
HYDRAULIC CIRCUIT FOR WORKING VEHICLE
Document Type and Number:
WIPO Patent Application WO/2011/114930
Kind Code:
A1
Abstract:
Disclosed is a hydraulic circuit for a working vehicle equipped with a load sensing system which controls the discharge rate of a first hydraulic pump (21) for supplying operating oil to a first actuator group (18) in accordance with the maximum load pressure among the load pressures applied to the first actuator group (18), and which controls the discharge rate of a second hydraulic pump (22) for supplying operating oil to a second actuator group (19) in accordance with the maximum load pressure among the load pressures applied to the second actuator group (19). The second actuator group (19) includes an operating hydraulic actuator (arm cylinder (14)) which has the largest required flow of operating oil from the among the first actuator group (18) and the second actuator group (19), and the maximum discharge rate of the second hydraulic pump (22) is set to be larger than the maximum discharge rate of the first hydraulic pump (21).
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Inventors:
MIYAKAWA Kenji (1717-1, Oaza Kumano, Chikugo-sh, Fukuoka 55, 〒8330055, JP)
宮川 健司 (〒55 福岡県筑後市大字熊野１７１７番地の１ ヤンマー建機株式会社内 Fukuoka, 〒8330055, JP)
宮川 健司 (〒55 福岡県筑後市大字熊野１７１７番地の１ ヤンマー建機株式会社内 Fukuoka, 〒8330055, JP)
Application Number:
JP2011/055245
Publication Date:
September 22, 2011
Filing Date:
March 07, 2011
Export Citation:
Assignee:
YANMAR CO., LTD. (1-32, Chayamachi Kita-ku, Osaka-sh, Osaka 13, 〒5300013, JP)
ヤンマー株式会社 (〒13 大阪府大阪市北区茶屋町１番３２号 Osaka, 〒5300013, JP)
MIYAKAWA Kenji (1717-1, Oaza Kumano, Chikugo-sh, Fukuoka 55, 〒8330055, JP)
ヤンマー株式会社 (〒13 大阪府大阪市北区茶屋町１番３２号 Osaka, 〒5300013, JP)
MIYAKAWA Kenji (1717-1, Oaza Kumano, Chikugo-sh, Fukuoka 55, 〒8330055, JP)
International Classes:
F15B11/00; E02F9/22; F15B11/02
Attorney, Agent or Firm:
YANO Juichiro (YANO INTERNATIONAL PATENT OFFICE, Twin 21 MID Tower 34th Floor 1-61, Shiromi 2-chome, Chuo-ku, Osaka-sh, Osaka 34, 〒5406134, JP)
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Claims: