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公开(公告)号：US10156162B2
公开(公告)日：2018-12-18
申请号：US15145069
申请日：2016-05-03
Applicant: Cummins Inc.
Inventor： Thomas Robert Marsh , Vaibhav J. Lawand , Brendan J. O'Grady
Abstract: Systems, apparatus, and methods are disclosed that include an internal combustion engine having a plurality of cylinders and at least one camshaft for opening at least one valve associated with the at least one cylinder. The camshaft includes a cam with a cam lobe defining a cam lobe profile having a base circle portion on a base circle of the cam lobe, a main cam lobe portion, and a low lift dwell portion that extends a constant height from the base circle along a substantial portion of the base circle to increase valve opening overlap and cylinder scavenging.
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Patent Agency Ranking
公开(公告)号：US11466604B2
公开(公告)日：2022-10-11
申请号：US17471826
申请日：2021-09-10
Applicant: Cummins Inc.
Inventor： Ankit Raghunath Lad , Joshua Alan Lantz , Vaibhav J. Lawand , Nicholas R. Lewis , Ian W. McGiffen , Arulkumaran Muthukumarasamy
Abstract: A system includes an exhaust aftertreatment system in exhaust gas receiving communication with an engine including a plurality of cylinders where the engine is structured to operate according to low load conditions and where a controller is structured to determine that at least one diesel emissions fluid (DEF) doser is frozen based on at least one of an ambient air temperature and a DEF source temperature. The controller is structured to operate the engine according to a skip-fire mode in response to a DEF flag indicating that the at least one DEF doser is frozen. The skip-fire mode comprises firing a portion of the plurality of cylinders that is less than a total amount of cylinders of the plurality of cylinders. The controller is structured to discontinue the skip-fire mode in response to determining that the at least one DEF doser is likely thawed.
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公开(公告)号：US20170321573A1
公开(公告)日：2017-11-09
申请号：US15145069
申请日：2016-05-03
Applicant: Cummins Inc.
Inventor： Thomas Robert Marsh , Vaibhav J. Lawand , Brendan J. O'Grady
CPC classification number: F01L1/08 , F01L1/053 , F01L1/185 , F01L13/0005 , F01L13/0015 , F01L2001/0537 , F01L2201/00 , F01L2800/10 , F02B25/145 , F02M26/04
Abstract: Systems, apparatus, and methods are disclosed that include an internal combustion engine having a plurality of cylinders and at least one camshaft for opening at least one valve associated with the at least one cylinder. The camshaft includes a cam with a cam lobe defining a cam lobe profile having a base circle portion on a base circle of the cam lobe, a main cam lobe portion, and a low lift dwell portion that extends a constant height from the base circle along a substantial portion of the base circle to increase valve opening overlap and cylinder scavenging.
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公开(公告)号：US11959410B2
公开(公告)日：2024-04-16
申请号：US17962974
申请日：2022-10-10
Applicant: Cummins Inc.
Inventor： Ankit Raghunath Lad , Joshua Alan Lantz , Vaibhav J. Lawand , Nicholas R. Lewis , Ian W. McGiffen , Arulkumaran Muthukumarasamy
CPC classification number: F01N3/2066 , B01D53/9418 , B01D53/9495 , F02D41/0082 , F02D41/0235 , F02D41/042 , F01N3/0293 , F01N3/0296 , F01N2410/06 , F01N2430/02 , F01N2550/05 , F01N2610/102 , F01N2610/1453 , F01N2610/1486 , F01N2900/0422 , F01N2900/08 , F01N2900/12 , F01N2900/1404 , F01N2900/16 , F01N2900/1616 , F01N2900/18 , F01N2900/1806 , F01N2900/1811 , F01N2900/1818 , F01N2900/1821 , F02D2041/0265 , F02D2200/08
Abstract: A method includes determining that at least one diesel emissions fluid (DEF) doser of an exhaust aftertreatment system is likely frozen based on at least one of an ambient air temperature or a DEF source temperature; operating an engine in a cylinder cutout mode in response to the determination that the at least one DEF doser is likely frozen; and, discontinuing the cylinder cutout mode in response to determining that the at least one DEF doser is in a predefined condition.
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公开(公告)号：US20230031074A1
公开(公告)日：2023-02-02
申请号：US17962974
申请日：2022-10-10
Applicant: Cummins Inc.
Inventor： Ankit Raghunath Lad , Joshua Alan Lantz , Vaibhav J. Lawand , Nicholas R. Lewis , Ian W. McGiffen , Arulkumaran Muthukumarasamy
Abstract: A method includes determining that at least one diesel emissions fluid (DEF) doser of an exhaust aftertreatment system is likely frozen based on at least one of an ambient air temperature or a DEF source temperature; operating an engine in a cylinder cutout mode in response to the determination that the at least one DEF doser is likely frozen; and, discontinuing the cylinder cutout mode in response to determining that the at least one DEF doser is in a predefined condition.
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公开(公告)号：US20210404366A1
公开(公告)日：2021-12-30
申请号：US17471826
申请日：2021-09-10
Applicant: Cummins Inc.
Inventor： Ankit Raghunath Lad , Joshua Alan Lantz , Vaibhav J. Lawand , Nicholas R. Lewis , Ian W. McGiffen , Arulkumaran Muthukumarasamy
Abstract: A system includes an exhaust aftertreatment system in exhaust gas receiving communication with an engine including a plurality of cylinders where the engine is structured to operate according to low load conditions and where a controller is structured to determine that at least one diesel emissions fluid (DEF) doser is frozen based on at least one of an ambient air temperature and a DEF source temperature. The controller is structured to operate the engine according to a skip-fire mode in response to a DEF flag indicating that the at least one DEF doser is frozen. The skip-fire mode comprises firing a portion of the plurality of cylinders that is less than a total amount of cylinders of the plurality of cylinders. The controller is structured to discontinue the skip-fire mode in response to determining that the at least one DEF doser is likely thawed.
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