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公开(公告)号：US20210062690A1
公开(公告)日：2021-03-04
申请号：US16553437
申请日：2019-08-28
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Etsuko M. STEWART , Scott T. Feldmann , Pratap S. Murthy
Abstract: A control system of a vehicle includes: an electric motor configured to phase rotation of an camshaft of an engine relative to rotation of a crankshaft of the engine; a current module configured to, while the engine is off: selectively transition a current signal back and forth between a first state and a second state; and a motor driver module configured to, while the engine is off: apply power to the electric motor from a battery and adjust a position of the camshaft toward a predetermined position when the current signal is in the first state; and disconnect the electric motor from the battery and allow the position of the camshaft to move away from the predetermined position when the current signal is in the second state.
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Patent Agency Ranking
公开(公告)号：US11156179B1
公开(公告)日：2021-10-26
申请号：US17038420
申请日：2020-09-30
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Andrew A. Raftopoulos , Michael A. Smith , Robert Gallon , Pratap S. Murthy , Scott T. Feldmann
Abstract: A system includes a fuel control module and a valve control module. The fuel control module controls a fuel injector to stop fuel delivery to each cylinder of an engine in a vehicle when the vehicle is decelerating. The valve control module controls a valve actuator to actuate intake and exhaust valves of each cylinder of the engine between open and closed positions when fuel delivery to each cylinder of the engine is stopped. The valve control module controls the valve actuator to adjust an amount of airflow through each cylinder of the engine to a minimum amount when fuel delivery to each cylinder of the engine is initially stopped. The valve control module controls the valve actuator to adjust the amount of airflow through each cylinder of the engine to an amount greater than the minimum amount before fuel delivery to each cylinder of the engine is restarted.
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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：US11441492B2
公开(公告)日：2022-09-13
申请号：US16887955
申请日：2020-05-29
Applicant: GM Global Technology Operations LLC
Inventor： Michael Kaczmar , Michael A. Smith , Amanda Keech , Pratap S. Murthy , Jason M. Moore
Abstract: An automobile vehicle overhead camshaft system includes multiple camshafts individually having multiple sliding camshaft barrels. Opposed ends of the camshaft barrels individually have a zero-lift lobe. Multiple intake valves are operated by a first one of the camshafts and multiple exhaust valves are operated by a second one of the camshafts. Multiple actuators operate during a deceleration cylinder cut-off (DCCO) mode to slidably displace the camshaft barrels to position the zero-lift lobe of predetermined ones of the multiple sliding camshaft barrels into contact with at least one of: all of the intake valves; or all of the exhaust valves.
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公开(公告)号：US20210372332A1
公开(公告)日：2021-12-02
申请号：US16887955
申请日：2020-05-29
Applicant: GM Global Technology Operations LLC
Inventor： Michael Kaczmar , Michael A. Smith , Amanda Keech , Pratap S. Murthy , Jason M. Moore
Abstract: An automobile vehicle overhead camshaft system includes multiple camshafts individually having multiple sliding camshaft barrels. Opposed ends of the camshaft barrels individually have a zero-lift lobe. Multiple intake valves are operated by a first one of the camshafts and multiple exhaust valves are operated by a second one of the camshafts. Multiple actuators operate during a deceleration cylinder cut-off (DCCO) mode to slidably displace the camshaft barrels to position the zero-lift lobe of predetermined ones of the multiple sliding camshaft barrels into contact with at least one of: all of the intake valves; or all of the exhaust valves.
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公开(公告)号：US10954830B1
公开(公告)日：2021-03-23
申请号：US16553437
申请日：2019-08-28
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Etsuko M. Stewart , Scott T. Feldmann , Pratap S. Murthy
Abstract: A control system of a vehicle includes: an electric motor configured to phase rotation of an camshaft of an engine relative to rotation of a crankshaft of the engine; a current module configured to, while the engine is off: selectively transition a current signal back and forth between a first state and a second state; and a motor driver module configured to, while the engine is off: apply power to the electric motor from a battery and adjust a position of the camshaft toward a predetermined position when the current signal is in the first state; and disconnect the electric motor from the battery and allow the position of the camshaft to move away from the predetermined position when the current signal is in the second state.
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