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Patent Searching and Data


Title:
HYDRAULIC CONTROL SYSTEM HAVING SWING MOTOR ENERGY RECOVERY
Document Type and Number:
WIPO Patent Application WO/2013/003046
Kind Code:
A3
Abstract:
A hydraulic control system (50) for a machine (10) is disclosed. The hydraulic control system may have a work tool (16) movable to perform an excavation cycle having a plurality of segments, a motor (49) configured to swing the work tool during the excavation cycle, and a pump (58) configured to pressurize fluid directed to drive the motor. The hydraulic control system may also have at least one accumulator (108, 110) configured to selectively receive fluid discharged from the motor and to discharge fluid to the motor during the plurality of segments, and a controller configured to implement a plurality of modes of operation. Each of the plurality of modes of operation includes a different combination of segments during which the at least one accumulator receives and discharges fluid.

Inventors:
ZHANG JIAO (US)
SHANG TONGLIN (US)
SPRING PETER (US)
MA PENGFEI (US)
PETERSON RANDAL (US)
CESUR RUSTU (US)
Application Number:
US2012/042349
Publication Date:
May 10, 2013
Filing Date:
June 14, 2012
Export Citation:
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Assignee:
CATERPILLAR INC (US)
ZHANG JIAO (US)
SHANG TONGLIN (US)
SPRING PETER (US)
MA PENGFEI (US)
PETERSON RANDAL (US)
CESUR RUSTU (US)
International Classes:
F15B21/14; E02F9/22; F15B13/02; F15B15/18; F15B17/02
Foreign References:
US20090228394A12009-09-10
US7908852B22011-03-22
JP2010106487A2010-05-13
KR20100053665A2010-05-20
Other References:
See also references of EP 2726747A4
Attorney, Agent or Firm:
SPILLMAN, M. Daniel et al. (100 N.E. Adams Street, Peoria, IL, 61629-9510, US)
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