HYDRAULIC CONTROL SYSTEM HAVING CYLINDER STALL STRATEGY

WIPO Patent Application WO/2012/166224

A3

A hydraulic control system (48) for a machine (10) is disclosed. The hydraulic control system may have a hydraulic circuit (50), a pump (52) configured to supply pressurized fluid, and a first sensor (105) configured to generate a first signal indicative of a pressure of the hydraulic circuit. The hydraulic circuit may also have a first fluid actuator (20) fluidly connected to receive pressurized fluid from the hydraulic circuit, a second sensor (103) configured to generate a second signal indicative of a velocity of the first fluid actuator, and a controller (58) in communication with the first and second sensors. The controller may be configured to receive an input indicative of a desired flow rate for the first fluid actuator, to determine an actual flow rate of the first fluid actuator based on the second signal, and to determine a stall condition of the first fluid actuator based on the desired flow rate, the actual flow rate, and the first signal.

WO/2012/082176	HYDRAULIC SYSTEM WITH RETURN PRESSURE CONTROL
JP2567651	[Name of device] Actuator
WO/2009/114407	HYDRAULIC SYSTEM HAVING MULTIPLE ACTUATORS AND AN ASSOCIATED CONTROL METHOD

PETERSON GRANT (US)
ANDERSON RANDALL (US)
CESUR RUSTU (US)
BRINKMAN JASON (US)

PCT/US2012/026844

January 24, 2013

February 28, 2012

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CATERPILLAR INC (US)
PETERSON GRANT (US)
ANDERSON RANDALL (US)
CESUR RUSTU (US)
BRINKMAN JASON (US)

F15B21/08; E02F9/22; F15B21/02

US20070074510A1	2007-04-05
JPH07174105A	1995-07-11
KR20100072482A	2010-07-01
EP1300595A2	2003-04-09

STEWART, Leonard et al. (Peoria, IL, US)

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