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公开(公告)号：US10006335B2
公开(公告)日：2018-06-26
申请号：US14932139
申请日：2015-11-04
Applicant: GM Global Technology Operations LLC
Inventor： Eugene V. Gonze , Christopher H. Knieper , Vijay A. Ramappan
CPC classification number: F01P7/164 , F01P3/18 , F01P5/10 , F01P2025/32 , F01P2025/40 , F01P2025/52
Abstract: A coolant control system of a vehicle includes an adjusting module that: (i) receives an engine output coolant temperature measured at a coolant output of an internal combustion engine; (ii) adjusts the engine output coolant temperature based on a reference temperature to produce a first adjusted coolant temperature; (iii) receives an engine input coolant temperature measured at a coolant input of the internal combustion engine; and (iv) adjusts the engine input coolant temperature based on the reference temperature to produce a second adjusted coolant temperature. The coolant control system also includes a difference module that determines a difference between the first and second adjusted coolant temperatures. The coolant control system also includes a pump control module that controls a coolant output of a coolant pump based on the difference between the first and second adjusted coolant temperatures.
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公开(公告)号：US11313291B2
公开(公告)日：2022-04-26
申请号：US16983375
申请日：2020-08-03
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Andrew A. Raftopoulos , Michael A. Smith , Christopher E. Whitney , Nathan M. Picot , Craig E. Slepicka , Robert Gallon , Darrell W. Burleigh , Vijay A. Ramappan
Abstract: An engine system includes: a first throttle valve; a turbocharger compressor disposed downstream of the first throttle valve; a charge air cooler disposed downstream of the turbocharger compressor; a second throttle valve located downstream of the turbocharger compressor; a purge inlet located downstream of the first throttle valve and configured to introduce fuel vapor from a fuel tank into intake air; and an engine control module configured to: maintain the first throttle valve in a fully open position; and selectively close the first throttle valve relative to the fully open position in response to receipt of a request to at least one of: purge fuel vapor from the fuel tank; and at least one of decrease and prevent icing of the charge air cooler.
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3.发明申请公开(公告)号：US20170159546A1
公开(公告)日：2017-06-08
申请号：US14956858
申请日：2015-12-02
Applicant: GM Global Technology Operations LLC
Inventor： Eugene V. GONZE , Sergio Quelhas , Vijay A. Ramappan , Michael J. Paratore, JR.
Abstract: A control system according to the principles of the present disclosure includes an estimated coolant flow module and at least one of a valve control module and a pump control module. The estimated coolant flow module estimates a rate of coolant flow through a cooling system for an engine based on a pressure of coolant in the cooling system and a speed of a coolant pump that circulates coolant through the cooling system. The valve control module controls the position of a coolant valve based on the estimated coolant flow rate. The pump control module controls the coolant pump speed based on the estimated coolant flow rate.
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公开(公告)号：US20250137413A1
公开(公告)日：2025-05-01
申请号：US18500018
申请日：2023-11-01
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chengke Liu , Rafat F. Hattar , John Michael Ellenberger , Vijay A. Ramappan , Andrew B. Gillett
IPC: F02D41/00
Abstract: Methods for operating internal combustion engines and methods for controlling intake air temperature in engines of vehicles are provided. An engine includes an intake system configured to deliver intake air to the internal combustion engine; an exhaust system configured to discharge exhaust gas from the internal combustion engine; and an exhaust gas recirculation (“EGR”) system configured to selectively deliver a portion of the exhaust gas to the intake system. The internal combustion engine is located in an underhood zone; the intake system includes a first intake pipe having an outlet in communication with the intake system and having an inlet located outside of the underhood zone to receive ambient air; and the intake system includes a second intake pipe having an outlet in communication with the intake system and having an inlet located within the underhood zone to receive air warmed by the internal combustion engine.
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公开(公告)号：US20170356327A1
公开(公告)日：2017-12-14
申请号：US15178128
申请日：2016-06-09
Applicant: GM Global Technology Operations LLC
Inventor： Eugene V. Gonze , Sergio Quelhas , Vijay A. Ramappan , Michael J. Paratore, JR.
IPC: F01P7/16
CPC classification number: F01P7/16 , F01P7/164 , F01P2025/08
Abstract: A strategy for controlling an electric pump and control valve in an internal combustion engine cooling system compensates for backpressure variations and maintains system operation within design parameters. The method comprises the steps of measuring the coolant temperature, measuring the electrical current and voltage to the pump motor, determining the pump speed and coolant flow, determining the desired coolant flow, determining a negative correction to the flow control valve and pump if desired flow is less than present coolant flow and determining a positive correction to the flow control valve and pump if desired flow is more than present coolant flow and undertaking this correction to coolant flow. Thus, based upon inferred back pressure in the engine coolant system from the data relating to the pump energy input, proper coolant flow, heat rejection and engine operating temperature can be maintained in spite of variations in system flow restrictions and backpressure.
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Patent Agency Ranking
公开(公告)号：US11885253B1
公开(公告)日：2024-01-30
申请号：US17987070
申请日：2022-11-15
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Andrew A. Raftopoulos , Pratap S. Murthy , Vijay A. Ramappan
CPC classification number: F01N9/00 , F01N3/2086 , F01N2430/00 , F01N2900/1626 , F02D41/0255 , F02D2200/0802
Abstract: A method of controlling light-off of a catalytic converter in an exhaust system of an internal combustion engine (ICE) includes identifying a start of the ICE requiring a light-off of the catalytic converter. The method also includes regulating an exhaust-flow control valve to increase exhaust gas backpressure in the exhaust system in response to the identified start of the ICE. The method additionally includes regulating combustion inside the ICE to increase enthalpy of the ICE. The method also includes detecting light-off of the catalytic converter. The method additionally includes regulating the exhaust-flow control valve to decrease the exhaust gas backpressure in the exhaust system in response to the catalytic converter light-off. Furthermore, the method includes regulating combustion inside the ICE to decrease ICE enthalpy in response to the catalytic converter light-off. The method may be embodied in an algorithm programmed in an electronic controller of a motor vehicle.
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公开(公告)号：US11098666B1
公开(公告)日：2021-08-24
申请号：US17035088
申请日：2020-09-28
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Michael A. Smith , Vijay A. Ramappan , Michael J. Lucido , Jeffrey M. Hutmacher , Scott T. Feldmann , Randy L. Dufresne
Abstract: A system includes a three-way catalyst (TWC) sulfur load module, a cylinder/fuel cutoff module, a fuel control module, and a valve control module. The TWC sulfur load module is configured to determine an amount of sulfur deposited on a three-way catalyst of an engine in a vehicle. The cylinder/fuel cutoff module is configured to determine whether to enable deceleration cylinder cutoff (DCCO) based on the amount of sulfur deposited on the three-way catalyst. The fuel control module is configured to control a fuel injector to selectively stop fuel injection in the engine when DCCO is enabled. The valve control module is configured to selectively maintain intake and exhaust valves of the engine in a closed position when DCCO is enabled.
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8.发明授权公开(公告)号：US10669922B2
公开(公告)日：2020-06-02
申请号：US14956858
申请日：2015-12-02
Applicant: GM Global Technology Operations LLC
Inventor： Eugene V. Gonze , Sergio Quelhas , Vijay A. Ramappan , Michael J. Paratore, Jr.
Abstract: A control system according to the principles of the present disclosure includes an estimated coolant flow module and at least one of a valve control module and a pump control module. The estimated coolant flow module estimates a rate of coolant flow through a cooling system for an engine based on a pressure of coolant in the cooling system and a speed of a coolant pump that circulates coolant through the cooling system. The valve control module controls the position of a coolant valve based on the estimated coolant flow rate. The pump control module controls the coolant pump speed based on the estimated coolant flow rate.
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公开(公告)号：US10605151B2
公开(公告)日：2020-03-31
申请号：US15178128
申请日：2016-06-09
Applicant: GM Global Technology Operations LLC
Inventor： Eugene V. Gonze , Sergio Quelhas , Vijay A. Ramappan , Michael J. Paratore, Jr.
IPC: F01P7/16
Abstract: A strategy for controlling an electric pump and control valve in an internal combustion engine cooling system compensates for backpressure variations and maintains system operation within design parameters. The method comprises the steps of measuring the coolant temperature, measuring the electrical current and voltage to the pump motor, determining the pump speed and coolant flow, determining the desired coolant flow, determining a negative correction to the flow control valve and pump if desired flow is less than present coolant flow and determining a positive correction to the flow control valve and pump if desired flow is more than present coolant flow and undertaking this correction to coolant flow. Thus, based upon inferred back pressure in the engine coolant system from the data relating to the pump energy input, proper coolant flow, heat rejection and engine operating temperature can be maintained in spite of variations in system flow restrictions and backpressure.
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公开(公告)号：US11885250B1
公开(公告)日：2024-01-30
申请号：US18315191
申请日：2023-05-10
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Vijay A. Ramappan , Rafat F. Hattar
IPC: F01N3/20
CPC classification number: F01N3/2013 , F01N2900/0602 , F01N2900/08 , F01N2900/104 , F01N2900/1602
Abstract: Vehicle systems and methods are provided for preheating an aftertreatment system prior to engine ignition. A method involves obtaining a first measurement indicative of a current temperature associated with the aftertreatment system, obtaining a second measurement indicative of a current state of an energy source coupled to a heating element integrated with the aftertreatment system, determining an amount of electrical energy to be applied to the heating element based at least in part on a difference between the current temperature associated with the aftertreatment system and a target temperature for the aftertreatment system, and automatically enabling current flow from the energy source to the heating element prior to ignition of the engine for a duration of time in a manner that is influenced by the amount of electrical energy to be applied to the heating element and the current state of the energy source.
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