Inventor
DU HONGLIU
US25 patents
⚠️ This page may combine multiple inventors who share the name “DU HONGLIU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CATERPILLAR INC
18 patentsUS6375433B1Apr 23, 2002
Method and apparatus for controlling pump discharge pressure of a variable displacement hydraulic pump
CATERPILLAR INC53 citations95
US7204138B2Apr 17, 2007
Hydraulic system health indicator
CATERPILLAR INC20 citations92
US7043975B2May 16, 2006
Hydraulic system health indicator
CATERPILLAR INC15 citations92
US6848254B2Feb 1, 2005
Method and apparatus for controlling a hydraulic motor
CATERPILLAR INC31 citations92
US6623247B2Sep 23, 2003
Method and apparatus for controlling a variable displacement hydraulic pump
CATERPILLAR INC42 citations92
US6468046B1Oct 22, 2002
Apparatus and method for controlling a discharge pressure of a variable displacement hydraulic pump
CATERPILLAR INC33 citations92
US6374722B1Apr 23, 2002
Apparatus and method for controlling a discharge pressure of a variable displacement hydraulic pump
CATERPILLAR INC31 citations92
US6848888B2Feb 1, 2005
Sensor for a variable displacement pump
CATERPILLAR INC20 citations90
US7130721B2Oct 31, 2006
Electrohydraulic control system
CATERPILLAR INC27 citations88
US7536856B2May 26, 2009
System for controlling a power output
CATERPILLAR INC8 citations83
US9869311B2Jan 16, 2018
System for estimating a displacement of a pump
CATERPILLAR INC6 citations73
US7797081B2Sep 14, 2010
Feedback acceleration reduction for fluid supply valves
CATERPILLAR INC7 citations73
US10227964B2Mar 12, 2019
Hydraulic pump port plate with variable area metering notch
CATERPILLAR INC2 citations68
US10323384B2Jun 18, 2019
Active damping ride control system for attenuating oscillations in a hydraulic actuator of a machine
CATERPILLAR INC2 citations64
US10145396B2Dec 4, 2018
Energy recovery system and method for hydraulic tool
CATERPILLAR INC4 citations64
US7493205B2Feb 17, 2009
Brake control system for an electric drive vehicle
CATERPILLAR INC5 citations62
US9404516B1Aug 2, 2016
System for estimating a sensor output
CATERPILLAR INC1 citations46
US9534616B2Jan 3, 2017
System for estimating a sensor output
CATERPILLAR INC0 citations37
DU HONGLIU
5 patentsUS8500587B2Aug 6, 2013
Multiple-variator control for split power CVT and hydrostatic transmissions
DU HONGLIU5 citations71
US8596057B2Dec 3, 2013
Method and apparatus for controlling a variable displacement hydraulic pump
DU HONGLIU3 citations61
US8635941B2Jan 28, 2014
Method and apparatus for controlling a pump
DU HONGLIU1 citations51
US8911216B2Dec 16, 2014
Method, apparatus, and computer-readable storage medium for controlling torque load of multiple variable displacement hydraulic pumps
DU HONGLIU1 citations47
US8935009B2Jan 13, 2015
Method and apparatus for controlling multiple variable displacement hydraulic pumps
DU HONGLIU0 citations37