Title:
HYDRAULIC ACTUATOR DRIVE MECHANISM FOR WHEEL LOADER WITH HIGH ALTITUDE HYDRAULIC CONTROL UNIT
Document Type and Number:
WIPO Patent Application WO/2017/190298
Kind Code:
A1
Abstract:
A hydraulic actuator drive mechanism (200) for a wheel loader (100), which is configured such that the wheel loader (100) can be moved to a high altitude place to perform a work even without replacing an existing hydraulic pump with a hydraulic pump (220) having a relatively small capacity to cope with a reduction in the engine power during the work at the high altitude place is disclosed. The hydraulic actuator drive mechanism (200) for the wheel loader (100) comprises a high altitude hydraulic control unit (250a) installed on a pilot signal line (233) of a main control valve (230) in a branched manner and configured to induce a part of a signal associated with the work at a high altitude place to reduce the pilot pressure so that the flow of the hydraulic fluid for the actuator for the wheel loader (100) is limited.
Inventors:
WANG YEAGER (CN)
CHANG CATHERINE (CN)
DIAO JEFF (CN)
CHANG CATHERINE (CN)
DIAO JEFF (CN)
Application Number:
PCT/CN2016/081060
Publication Date:
November 09, 2017
Filing Date:
May 05, 2016
Export Citation:
Assignee:
VOLVO CONSTR EQUIP AB (SE)
WANG YEAGER (CN)
WANG YEAGER (CN)
International Classes:
F15B11/02; E02F9/22
Foreign References:
| JPH11201109A | 1999-07-27 | |||
| CN202831051U | 2013-03-27 | |||
| CN103046609A | 2013-04-17 | |||
| CN86106036A | 1987-05-20 | |||
| JP3748824B2 | 2006-02-22 | |||
| JP5320003B2 | 2013-10-23 | |||
| JP2002294759A | 2002-10-09 | |||
| JPH10274210A | 1998-10-13 |
Attorney, Agent or Firm:
MING & SURE INTELLECTUAL PROPERTY LAW FIRM (CN)
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