Title:
HYDRAULIC CONTROL SYSTEM HAVING CYLINDER FLOW CORRECTION
Document Type and Number:
WIPO Patent Application WO/2012/166223
Kind Code:
A3
Abstract:
A hydraulic control system (48) is disclosed. The hydraulic control system may have a hydraulic actuator (20), a valve arrangement (54), and an operator input device (98) configured to generate a first signal indicative of a desired hydraulic actuator velocity. The hydraulic control system may also have a sensor (103) configured to generate a second signal indicative of an actual flow rate of fluid entering the hydraulic actuator, and a controller (58). The controller may be configured to determine a desired flow rate of fluid into the hydraulic actuator based on the first signal; to estimate the actual flow rate based on the desired flow rate, a correction flow rate, and a system response model; and to determine the actual flow rate based on the second signal. The controller may also be configured to make a comparison of the estimated and determined actual flow rates of fluid, and to determine the correction flow rate based on the comparison.
Inventors:
PETERSON GRANT (US)
ANDERSON RANDALL (US)
ANDERSON RANDALL (US)
Application Number:
PCT/US2012/026843
Publication Date:
February 28, 2013
Filing Date:
February 28, 2012
Export Citation:
Assignee:
CATERPILLAR INC (US)
PETERSON GRANT (US)
ANDERSON RANDALL (US)
PETERSON GRANT (US)
ANDERSON RANDALL (US)
International Classes:
F15B21/08; E02F9/22; F15B13/02
Foreign References:
| US6286412B1 | 2001-09-11 | |||
| EP1300595A2 | 2003-04-09 | |||
| KR100683577B1 | 2007-02-16 | |||
| US20030121551A1 | 2003-07-03 |
Attorney, Agent or Firm:
STEWART, Leonard et al. (Peoria, IL, US)
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