Inventor
Vijay Ramappan
Inventor
Novi, MI, US
Overview
Patents· 53 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
Y02Tprimary
Y02TClimate change mitigation technologies related to transportation28%
F02DControlling combustion engines26%
F02BInternal-combustion piston engines11%
F01PCooling of machines or engines in general9%
F02MSupplying combustion engines in general with combustible mixtures or constituents thereof8%
F01LCyclically operating valves for machines or engines4%
F01NGas-flow silencers or exhaust apparatus for machines or engines in general3%
F02PIgnition, other than compression ignition, for internal-combustion engines3%
F01MLubricating of machines or engines in general1%
F02NStarting of combustion engines1%
PatentTitleYear
11,118,491Gasoline particulate filter regeneration systems and methods202111,098,666System and method for controlling amount of sulfur on three-way catalyst by limiting deceleration cylinder cut off202110,808,594Generalized cold start emissions reduction strategy202010,669,922System and method for adjusting the rate of coolant flow through an engine based on coolant pressure202010,605,151Electric pump operating strategy202010,480,391Coolant control systems and methods to prevent coolant boiling201910,352,223Method for cold start emissions diagnostic201910,006,335Coolant temperature correction systems and methods20189,964,022Engine off cooling strategy20189,957,875Coolant pump control systems and methods for backpressure compensation20189,932,917Exhaust gas recirculation control systems and methods20189,869,223'Flexible engine metal warming system and method for an internal combustion engine'20189,863,337'Systems for regeneration of a gasoline particulate filter'20189,840,962'System and method for controlling inlet coolant temperature of an internal combustion engine'20179,719,406'Engine out coolant temperature correction'20179,719,408'System and method for engine block cooling'20179,599,011'Electric coolant pump diagnostic systems and methods'20179,540,987'System and method for diagnosing a fault in a partitioned coolant valve'20179,506,420'External EGR rate feedback'20169,341,133'Exhaust gas recirculation control systems and methods'20169,157,390'Selective exhaust gas recirculation diagnostic systems and methods'20158,915,236'Systems and methods for controlling engine combustion stability'20148,868,319'System and method for controlling intake valve timing in homogeneous charge compression ignition engines'20148,776,762'HCCI mode switching control system and method'20148,755,987'System and method for torque control in a homogeneous charge compression ignition engine'20148,726,880'Electric cam phaser control systems and methods'20148,539,932'Systems and methods for heating intake air during cold HCCI operation'20138,499,738'Control systems for a variable capacity engine oil pump'20138,463,531'System and method for controlling exhaust gas recirculation systems'20138,452,520'Control system and method for low quantity fuel injection'20138,433,500'System and method for improved transitions between engine combustion modes'20138,397,490'System and method for controlling a catalyst temperature in an HCCI combustion engine'20138,381,700'Systems and methods for exhaust gas recirculation control in homogeneous charge compression ignition engine systems'20138,322,324'System and method for controlling transient switching between HCCI mode and SI mode of an engine'20128,316,818'HCCI mode switching control system and method'20128,290,686'Method for controlling combustion mode transitions for an internal combustion engine'20128,276,551'HCCI combustion moding state control for fuel economy and seamless transitions'20128,220,436'HCCI/SI combustion switching control system and method'20128,160,802'Closed-loop adaptation of homogenous charge compression ignition operating zone based on ringing index'20128,118,010'Diagnostic systems and methods for fuel injectors in homogenous charge compression ignition engine systems'20128,086,388'Camshaft phasor synchronization system for an engine'20118,036,807'Control strategy for transitioning among combustion modes in an internal combustion engine'20118,000,882'Active combustion control based on ringing index for reducing homogenous charge compression ignition (HCCI) combustion noise'20117,975,668'Spark timing and control during transitions between spark ignited combustion and homogenous charge compression ignition'20117,963,268'Control strategy for transitions between homogeneous-charge compression-ignition and spark-ignition combustion modes'20117,765,053'Multi-injection combustion cycle systems for SIDI engines'20107,742,869'Late intake valve closing to improve cold startability for spark-ignition direct-injection (SIDI) engines'20107,739,027'Method and apparatus for monitoring an EGR valve in an internal combustion engine'20107,729,844'HCCI combustion moding state control for fuel economy and seamless transitions'20107,599,785'Multiple injection blend for direct injected engines'20097,478,625'Engine cranking system with cylinder deactivation for a direct injection engine'20097,415,348'Multiple injection blend for direct injected engines'20087,131,425'Method to control auto-ignition in an internal combustion engine equipped with variable valve timing control'2006Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2006Based in Pittsford, NY, US· patent location history
2008–2016Patents assigned to GM GLOBAL TECH OPERATIONS INC (32)· patent assignee history
2008–2021Based in Novi, MI, US· patent location history
2011–2018Patents assigned to RAMAPPAN VIJAY (22)· patent assignee history
2012–2014Patents assigned to KANG JUN-MO (9)· patent assignee history
2012–2014Patents assigned to RAYL ALLEN B (7)· patent assignee history
2016–2021Patents assigned to GM GLOBAL TECH OPERATIONS LLC (19)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| GM GLOBAL TECH OPERATIONS INC | 32 | 2008–2016 |
| RAMAPPAN VIJAYself | 22 | 2011–2018 |
| GM GLOBAL TECH OPERATIONS LLC | 19 | 2016–2021 |
| KANG JUN-MO | 9 | 2012–2014 |
| RAYL ALLEN B | 7 | 2012–2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Novi, MI, US | 52 | 2008–2021 |
| Pittsford, New York, US | 1 | 2006 |