Inventor · disambiguated record
Hongliu Du
Also filed as: DU HONGLIU
25 granted patents·5 pending applications·359 citations·filing 1997–2025
96Inventor score
Top patents by PatentIndex Score
30 records- 0193US7204138B2Hydraulic system health indicatorCATERPILLAR INC·Filed 2006·Granted Apr 17, 2007·20 cites·12 claims
- 0293US6375433B1Method and apparatus for controlling pump discharge pressure of a variable displacement hydraulic pumpCATERPILLAR INC·Filed 2000·Granted Apr 23, 2002·53 cites·13 claims
- 0391US9869311B2System for estimating a displacement of a pumpCATERPILLAR INC·Filed 2015·Granted Jan 16, 2018·6 cites·20 claims
- 0491US6623247B2Method and apparatus for controlling a variable displacement hydraulic pumpCATERPILLAR INC·Filed 2001·Granted Sep 23, 2003·42 cites·28 claims
- 0588US6468046B1Apparatus and method for controlling a discharge pressure of a variable displacement hydraulic pumpCATERPILLAR INC·Filed 2000·Granted Oct 22, 2002·33 cites·13 claims
- 0687US6374722B1Apparatus and method for controlling a discharge pressure of a variable displacement hydraulic pumpCATERPILLAR INC·Filed 2000·Granted Apr 23, 2002·31 cites·14 claims
- 0786US6848254B2Method and apparatus for controlling a hydraulic motorCATERPILLAR INC·Filed 2003·Granted Feb 1, 2005·31 cites·20 claims
- 0883US8790091B2Pump having port plate pressure controlMEHTA VIRAL S·Filed 2011·Granted Jul 29, 2014·7 cites·18 claims
- 0980US10145396B2Energy recovery system and method for hydraulic toolCATERPILLAR INC·Filed 2016·Granted Dec 4, 2018·4 cites·20 claims
- 1080US7043975B2Hydraulic system health indicatorCATERPILLAR INC·Filed 2003·Granted May 16, 2006·15 cites·22 claims
- 1180US6848888B2Sensor for a variable displacement pumpCATERPILLAR INC·Filed 2002·Granted Feb 1, 2005·20 cites·30 claims
- 1277US8500587B2Multiple-variator control for split power CVT and hydrostatic transmissionsDU HONGLIU·Filed 2010·Granted Aug 6, 2013·5 cites·20 claims
- 1376US7797081B2Feedback acceleration reduction for fluid supply valvesCATERPILLAR INC·Filed 2007·Granted Sep 14, 2010·7 cites·13 claims
- 1476US7536856B2System for controlling a power outputCATERPILLAR INC·Filed 2005·Granted May 26, 2009·8 cites·17 claims
- 1575US10227964B2Hydraulic pump port plate with variable area metering notchCATERPILLAR INC·Filed 2015·Granted Mar 12, 2019·2 cites·20 claims
- 1675US6068428ACapsule train separation system for fluid capsule pipeline transporationUNIV MISSOURI·Filed 1997·Granted May 30, 2000·35 cites·25 claims
- 1772US7130721B2Electrohydraulic control systemCATERPILLAR INC·Filed 2004·Granted Oct 31, 2006·27 cites·30 claims
- 1867US9404516B1System for estimating a sensor outputCATERPILLAR INC·Filed 2015·Granted Aug 2, 2016·1 cites·20 claims
- 1967US8911216B2Method, apparatus, and computer-readable storage medium for controlling torque load of multiple variable displacement hydraulic pumpsDU HONGLIU·Filed 2011·Granted Dec 16, 2014·1 cites·20 claims
- 2067US8635941B2Method and apparatus for controlling a pumpDU HONGLIU·Filed 2010·Granted Jan 28, 2014·1 cites·20 claims
- 2161US10323384B2Active damping ride control system for attenuating oscillations in a hydraulic actuator of a machineCATERPILLAR INC·Filed 2016·Granted Jun 18, 2019·2 cites·20 claims
- 2260US8596057B2Method and apparatus for controlling a variable displacement hydraulic pumpDU HONGLIU·Filed 2009·Granted Dec 3, 2013·3 cites·15 claims
- 2358US2025293568A1Integrated electric pump and vehicleWEICHAI POWER CO LTD·Filed 2025·Application pending·0 cites
- 2447US2014169987A1Dielectric Sensor Arrangement and Method for Swashplate Angular Position DetectionDU HONGLIU·Filed 2012·Application pending·0 cites
- 2546US2015337871A1Hydraulic control system having bias current correctionCATERPILLAR INC·Filed 2014·Application pending·0 cites
- 2645US8935009B2Method and apparatus for controlling multiple variable displacement hydraulic pumpsDU HONGLIU·Filed 2011·Granted Jan 13, 2015·0 cites·20 claims
- 2744US7493205B2Brake control system for an electric drive vehicleCATERPILLAR INC·Filed 2004·Granted Feb 17, 2009·5 cites·28 claims
- 2841US2017115249A1Aeration sensor for a hydraulic circuitCATERPILLAR INC·Filed 2015·Application pending·0 cites
- 2940US2014060034A1Electro-Hydraulic Control Design for Pump Discharge Pressure ControlDU HONGLIU·Filed 2012·Application pending·0 cites
- 3038US9534616B2System for estimating a sensor outputCATERPILLAR INC·Filed 2015·Granted Jan 3, 2017·0 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →