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Patent Searching and Data


Title:
METHOD AND APPARATUS FOR CONTROLLING A VARIABLE DISPLACEMENT HYDRAULIC PUMP
Document Type and Number:
WIPO Patent Application WO/2011/043867
Kind Code:
A3
Abstract:
A control system for a variable displacement hydraulic pump is disclosed. The control system utilizes two flow control valves to provide a flow of hydraulic fluid to two control actuators. The control actuators create opposing moments on the pump swashplate to control swashplate orientation and pump displacement.

Inventors:
DU, Hongliu (3604 Kestral Dr, Naperville, IL, 60564-4205, US)
Application Number:
US2010/045721
Publication Date:
April 14, 2011
Filing Date:
August 17, 2010
Export Citation:
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Assignee:
CATERPILLAR INC. (100 N.E. Adams Street, Peoria, IL, 61629-9510, US)
DU, Hongliu (3604 Kestral Dr, Naperville, IL, 60564-4205, US)
International Classes:
F15B13/044; E02F9/22; F04B25/04; F04B27/08
Foreign References:
US20020176784A12002-11-28
KR200407224Y12006-09-22
JP2005201076A2005-07-28
KR100773987B12007-11-08
KR100264281B12000-08-16
Attorney, Agent or Firm:
TROUSDALE, Jonathan, V. et al. (100 N. E. Adams Street, Peoria, IL, 61629-9510, US)
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