Title:
HYDRAULIC SYSTEM FOR INDUSTRIAL VEHICLE
Document Type and Number:
WIPO Patent Application WO/2023/095739
Kind Code:
A1
Abstract:
A hydraulic system (1) includes: a variable-capacity type steering pump (21) which supplies working oil to a steering actuator (11); a variable-capacity type cargo pump (31) which supplies working oil to at least one cargo actuator (12); and a confluence line (71) which branches off from a steering supply line (22) and is connected to a cargo supply line (32). The hydraulic system (1) further includes: a cargo regulator (5) which receives input of a cargo demand command pressure and in which the capacity of the cargo pump (31) increases as the cargo demand command pressure increases; and a steering regulator (4) for receiving, as a load sensing pressure, input of one of a steering load pressure or a cargo load pressure that is higher than the other and for controlling the capacity of the steering pump (21) such that the differential pressure between the load sensing pressure and the discharge pressure of the steering pump (21) becomes constant.
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Inventors:
KODERA HIROYASU
MATSUO MASAHIRO
MIKI TAKASHI
FUJIMOTO YUSUKE
MATSUO MASAHIRO
MIKI TAKASHI
FUJIMOTO YUSUKE
Application Number:
PCT/JP2022/042973
Publication Date:
June 01, 2023
Filing Date:
November 21, 2022
Export Citation:
Assignee:
KAWASAKI HEAVY IND LTD (JP)
International Classes:
E02F9/22; B62D5/065; B62D5/07; B66F9/22; F15B11/00; F15B11/02
Foreign References:
| JPH07172328A | 1995-07-11 | |||
| JP2017226492A | 2017-12-28 | |||
| US20210309287A1 | 2021-10-07 | |||
| JP2011047460A | 2011-03-10 | |||
| JPS5970245A | 1984-04-20 | |||
| US20080104953A1 | 2008-05-08 | |||
| JP2016114142A | 2016-06-23 | |||
| JPH06301Y2 | 1994-01-05 | |||
| JP2022123288A | 2022-08-24 |
Attorney, Agent or Firm:
ARCO PATENT & TRADEMARK ATTORNEYS (JP)
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