Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
HYDRAULIC CONTROL SYSTEM HAVING SWING MOTOR ENERGY RECOVERY
Document Type and Number:
WIPO Patent Application WO/2013/003047
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 through segments of an excavation cycle, a motor (49) configured to swing the work tool during the excavation cycle, at least one accumulator (108, 110) configured to selectively receive fluid discharged from the motor and to discharge fluid to the motor during the excavation cycle, and a controller (100). The controller may be configured to receive input regarding a current excavation cycle of the work tool, and make a determination based on the input that the current excavation cycle is associated with one of a set of known modes of operation. The controller may be further configured to cause the at least one accumulator to receive fluid and discharge fluid during different segments of the excavation cycle based on the determination.

Inventors:
ZHANG JIAO (US)
SHANG TONGLIN (US)
SPRING PETER (US)
MA PENGFEI (US)
PETERSON RANDAL (US)
Application Number:
PCT/US2012/042350
Publication Date:
March 07, 2013
Filing Date:
June 14, 2012
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
CATERPILLAR INC (US)
ZHANG JIAO (US)
SHANG TONGLIN (US)
SPRING PETER (US)
MA PENGFEI (US)
PETERSON RANDAL (US)
International Classes:
F15B13/02; E02F9/22; F15B21/08
Foreign References:
JP2010106487A2010-05-13
JP2009084832A2009-04-23
JPH09217702A1997-08-19
US7908852B22011-03-22
Attorney, Agent or Firm:
SPILLMAN, M. Daniel et al. (Peoria, IL, US)
Download PDF: