Inventor · disambiguated record
Sergio Quelhas
Also filed as: QUELHAS SERGIO
17 granted patents·5 pending applications·101 citations·filing 2001–2024
92Inventor score
Files withGM GLOBAL TECH OPERATIONS LLC14DELPHI TECH INC3GAUTHIER DANIEL G2FAYYAD SALEM AHMAD1FEDOR III WILLIAM J1
Top patents by PatentIndex Score
22 records- 0194US10161501B2System and method for adjusting coolant flow through a cooling system of a vehicle to increase a warming rate of a transmissionGM GLOBAL TECH OPERATIONS LLC·Filed 2016·Granted Dec 25, 2018·6 cites·20 claims
- 0291US9752539B2Method for diagnosing leaks downstream of the purge flow control orificeGM GLOBAL TECH OPERATIONS LLC·Filed 2016·Granted Sep 5, 2017·6 cites·4 claims
- 0390US11415040B1Heating oil for enhanced active thermal coolant systemGM GLOBAL TECH OPERATIONS LLC·Filed 2021·Granted Aug 16, 2022·2 cites·13 claims
- 0490US10669922B2System and method for adjusting the rate of coolant flow through an engine based on coolant pressureGM GLOBAL TECH OPERATIONS LLC·Filed 2015·Granted Jun 2, 2020·4 cites·14 claims
- 0584US9719389B2System and method for reducing cold start emissions using an active exhaust throttle valve and an exhaust gas recirculation loopGM GLOBAL TECH OPERATIONS LLC·Filed 2015·Granted Aug 1, 2017·3 cites·20 claims
- 0684US6803236B2Diagnostic system for monitoring catalyst performanceDELPHI TECH INC·Filed 2001·Granted Oct 12, 2004·30 cites·18 claims
- 0779US10605151B2Electric pump operating strategyGM GLOBAL TECH OPERATIONS LLC·Filed 2016·Granted Mar 31, 2020·2 cites·12 claims
- 0877US8978453B2Crank signal error detection using a cam signal intervalFAYYAD SALEM AHMAD·Filed 2012·Granted Mar 17, 2015·7 cites·6 claims
- 0976US6933151B2Diagnostic system for monitoring catalyst performanceDELPHI TECH INC·Filed 2004·Granted Aug 23, 2005·17 cites·8 claims
- 1074US6622691B2Control method for a direct injection gas engine with fuel vapor purgingDELPHI TECH INC·Filed 2001·Granted Sep 23, 2003·20 cites·10 claims
- 1169US12392300B1Vehicle with gasoline particulate filter soot regeneration strategy with criteria emission reduction for low NOX emissionsGM GLOBAL TECH OPERATIONS LLC·Filed 2024·Granted Aug 19, 2025·0 cites·20 claims
- 1265US10323564B2Systems and methods for increasing temperature of an internal combustion engine during a cold start including low coolant flow rates during a startup periodGM GLOBAL TECH OPERATIONS LLC·Filed 2016·Granted Jun 18, 2019·1 cites·20 claims
- 1363US8662056B2Fuel pressure control system and method having a variable pull-in time interval based pressureFEDOR III WILLIAM J·Filed 2010·Granted Mar 4, 2014·3 cites·8 claims
- 1462US11078825B2Method and apparatus for control of propulsion system warmup based on engine wall temperatureGM GLOBAL TECH OPERATIONS LLC·Filed 2019·Granted Aug 3, 2021·0 cites·16 claims
- 1552US10895192B1Dual pump system and method for cooling an engine of a motor vehicleGM GLOBAL TECH OPERATIONS LLC·Filed 2019·Granted Jan 19, 2021·0 cites·20 claims
- 1649US11434810B2Vehicle thermal management system including mechanically driven pump, rotary valve(s), bypass line allowing engine outlet coolant to bypass heat exchanger(s), or combinations thereofGM GLOBAL TECH OPERATIONS LLC·Filed 2021·Granted Sep 6, 2022·0 cites·16 claims
- 1749US10273872B2Air-to-air charge air cooler (A-CAC) for a vehicleGM GLOBAL TECH OPERATIONS LLC·Filed 2016·Granted Apr 30, 2019·0 cites·18 claims
- 1844US2008136404A1Cam phasing system with mid-range engine shutdownGAUTHIER DANIEL G·Filed 2008·Application pending·0 cites
- 1942US2007251474A1Cam phasing system with mid-range engine shutdownGAUTHIER DANIEL G·Filed 2006·Application pending·0 cites
- 2038US2021206229A1System and method for controlling fluid temperature in a thermal systemGM GLOBAL TECH OPERATIONS LLC·Filed 2020·Application pending·0 cites
- 2137US2009049897A1Method for on-line adaptation of engine volumetric efficiency using a mass air flow sensorOLIN PETER M·Filed 2007·Application pending·0 cites
- 2235US2017362995A1Vehicle air intake systemGM GLOBAL TECH OPERATIONS LLC·Filed 2017·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →