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Patent Searching and Data


Title:
PRESSURE OVERSHOOTING PREVENTION SYSTEM FOR ELECTRONIC HYDRAULIC PUMP IN HYDRAULIC SYSTEM
Document Type and Number:
WIPO Patent Application WO/2013/100509
Kind Code:
A1
Abstract:
The present invention relates to a pressure overshooting prevention system for an electronic hydraulic pump in a hydraulic system. A flow command is added (+) and a discharge flow rate is subtracted (-) to calculate a displacement flow rate (Delta Q) and generate a first pressure command corresponding to the displacement flow rate (Delta Q). A working fluid pressure value corresponding to the discharge flow rate is generated. A limit pressure command is generated so as to limit an increased gradient for a working fluid pressure value. A stall is determined based on a first rate of change of the flow command and a second rate of change of the discharge flow rate. When a stall is determined, the limit pressure command is set as a second pressure command. The smaller value of the first pressure command and the second pressure command is selected as a final pressure command so as to control an electronic proportional control valve and reduce overshooting of the electronic hydraulic pump.

Inventors:
JUNG WOOYONG (KR)
Application Number:
KR2012/011352
Publication Date:
July 04, 2013
Filing Date:
December 24, 2012
Export Citation:
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Assignee:
DOOSAN INFRACORE CO LTD (401-020, KR)
International Classes:
F04B49/08; F04B49/10; F15B13/044; F15B20/00
Foreign References:
KR20110073082A2011-06-29
KR20100072482A2010-07-01
JP2005265002A2005-09-29
JP2009144505A2009-07-02
JP2002195164A2002-07-10
Other References:
See also references of EP 2801724A4
None
Attorney, Agent or Firm:
HANBEOT PATENT LAW FIRM (120-013, KR)
특허법인 한벗 (120-013, KR)
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Claims: