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公开(公告)号：US11619187B2
公开(公告)日：2023-04-04
申请号：US17714880
申请日：2022-04-06
Applicant: Tula Technology, Inc. , Cummins Inc.
Inventor： Louis J. Serrano , Xiaoping Cai , Shikui Kevin Chen , Benjamin M. Wolk , Avra Brahma , Justin R. Lee
Abstract: A system and method for transitioning a firing fraction of a variable displacement internal combustion engine when generating a desired torque output. During and following the transition to the second firing fraction, a combustion recipe is ascertained and used operating the cylinders of the variable displacement internal combustion engine to generate the desired torque output. The recipe is preferably optimized for the engine operating at the second firing fraction, at least relative to the previous charge of the previous combustion recipe used with the first firing fraction.
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公开(公告)号：US11326532B1
公开(公告)日：2022-05-10
申请号：US17412668
申请日：2021-08-26
Applicant: Tula Technology, Inc. , Cummins Inc.
Inventor： Louis J. Serrano , Xiaoping Cai , Shikui Kevin Chen , Benjamin M. Wolk , Avra Brahma , Justin R. Lee
Abstract: A system and method for transitioning a firing fraction of a variable displacement internal combustion engine when generating a desired torque output. During and following the transition to the second firing fraction, a combustion recipe is ascertained and used operating the cylinders of the variable displacement internal combustion engine to generate the desired torque output. The recipe is preferably optimized for the engine operating at the second firing fraction, at least relative to the previous charge of the previous combustion recipe used with the first firing fraction.
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公开(公告)号：US20220065182A1
公开(公告)日：2022-03-03
申请号：US17373247
申请日：2021-07-12
Applicant: Tula Technology, Inc. , Cummins, Inc.
Inventor： Louis Joe Serrano , Xiaoping Cai , Yongyan Cao , Vijay Srinivasan , Kevin Shikui Chen , Andrea Marie Evans , Avra Brahma
Abstract: A variety of methods and arrangements are described for managing recharging of cylinders of an internal combustion engine during skip fire operation of the engine. In one method, a maximum allowed deactivation time for a cylinder is determined and the cylinder is recharged before the maximum allowed deactivation time is exceeded.
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公开(公告)号：US11946423B2
公开(公告)日：2024-04-02
申请号：US17373247
申请日：2021-07-12
Applicant: Tula Technology, Inc. , Cummins, Inc.
Inventor： Louis Joe Serrano , Xiaoping Cai , Yongyan Cao , Vijay Srinivasan , Kevin Shikui Chen , Andrea Marie Evans , Avra Brahma
CPC classification number: F02D41/0087 , F02D35/024 , F02D41/0007 , F02D41/0055 , F02D41/0077 , F02D41/1401 , F02D41/38 , F02D2041/0012 , F02D2041/141 , F02D2041/1433 , F02D2200/0406
Abstract: A variety of methods and arrangements are described for managing recharging of cylinders of an internal combustion engine during skip fire operation of the engine. In one method, a maximum allowed deactivation time for a cylinder is determined and the cylinder is recharged before the maximum allowed deactivation time is exceeded.
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公开(公告)号：US11920533B2
公开(公告)日：2024-03-05
申请号：US17927573
申请日：2020-05-27
Applicant: Cummins Inc. , Tula Technology, Inc.
Inventor： Jennifer Kay Light-Holets , J. Steven Kolhouse , Christopher R. Nelson , Anant Puri , Xiaobo Song , Avra Brahma
CPC classification number: F02D41/024 , F01N3/202 , F01N3/2026 , F01N3/2033 , F01N3/2066 , F02D41/0002 , F02D41/005 , F02D41/0087 , F02D41/38 , F02M27/04 , F02D2041/389 , F02D2200/0804 , F02D2200/50
Abstract: A system includes an aftertreatment system heater of an exhaust aftertreatment system coupled to an engine A controller coupled to the aftertreatment system heater is configured to determine a condition of an exhaust gas from an engine and compare the condition to a predefined threshold. If the condition of the exhaust gas does not meet the predefined threshold, the controller is configured to determine whether an engine operating condition is met for activating a cylinder deactivation operating mode for the engine. If the engine operating condition is met, the controller is configured to operate the engine in the cylinder deactivation operating mode by deactivating a cylinder of a plurality of cylinders. If the engine operating condition is not met, the controller is configured to activate the aftertreatment system heater to heat the exhaust gas.
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Patent Agency Ranking
公开(公告)号：US11459965B2
公开(公告)日：2022-10-04
申请号：US17186979
申请日：2021-02-26
Applicant: Tula Technology, Inc. , Cummins Inc.
Inventor： Vijay Srinivasan , Louis J. Serrano , Xiaoping Cai , J. Steven Kolhouse , Avra Brahma , Adrian P. Dale
Abstract: Managing firing fraction transitions of a variable displacement internal combustion engines by (a) avoiding transport delays in an Exhaust Gas Recirculation (EGR) feed by starting movement of an EGR valve position after a decision to transition to a new firing fraction has been made, but prior to the start of the transition and (b) adjusting the EGR valve as needed during the transition so as to maintain an EGR fraction within a predetermined range during the transition. By performing both (a) and (b), spikes of nitrous oxide (NOx) and/or hydrocarbon emissions are reduced or altogether eliminated during the transition.
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公开(公告)号：US11499490B1
公开(公告)日：2022-11-15
申请号：US17544568
申请日：2021-12-07
Applicant: Cummins Inc. , Tula Technology, Inc.
Inventor： J. Steven Kolhouse , Avra Brahma
Abstract: Systems and methods for mitigating exhaust gas emissions via cylinder deactivation are provided. A system includes a controller coupled to an internal combustion engine and an electric motive device. The controller includes a processor and a memory coupled to the processor. The memory stores instruction that, when executed by the processor, cause the controller to: command the internal combustion engine to operate in a cylinder deactivation mode whereby at least one cylinder of a plurality of cylinders of the internal combustion engine is deactivated; receive a power request exceeding a current power output from the internal combustion engine; command the electric motive device to provide a supplemental power output based on the received power request; and, subsequent to commanding the electric motive device to provide the supplemental power out, activate the at least one cylinder of the plurality of cylinders of the internal combustion engine.
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公开(公告)号：US11131259B1
公开(公告)日：2021-09-28
申请号：US17119321
申请日：2020-12-11
Applicant: Tula Technology, Inc. , Cummins Inc.
Inventor： Louis J. Serrano , Xiaoping Cai , Shikui Kevin Chen , Benjamin M. Wolk , Avra Brahma , Justin R. Lee
Abstract: A system and method for transitioning a firing fraction of a variable displacement internal combustion engine when generating a desired torque output. During and following the transition to the second firing fraction, a charge of a combustion recipe is ascertained and used operating the cylinders of the variable displacement internal combustion engine to generate the desired torque output. The charge is preferably optimized for the engine operating at the second firing fraction, at least relative to the previous charge of the previous combustion recipe used with the first firing fraction.
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公开(公告)号：US11859569B2
公开(公告)日：2024-01-02
申请号：US17982149
申请日：2022-11-07
Applicant: Cummins Inc. , Tula Technology, Inc.
Inventor： J. Steven Kolhouse , Avra Brahma
IPC: F02D41/00 , F02D13/02 , F02D41/14 , F02D13/06 , B60W20/40 , B60W10/08 , B60W10/06 , F02D41/12 , F01L13/00
CPC classification number: F02D41/0087 , B60W10/06 , B60W10/08 , B60W20/40 , F02D13/0242 , F02D13/06 , F02D41/0072 , F02D41/123 , F02D41/1454 , F01L2013/001 , F02D2250/36
Abstract: Systems and methods for mitigating exhaust gas emissions via cylinder deactivation are provided. A system includes a controller coupled to an internal combustion engine and an electric motive device. The controller includes a processor and a memory. The memory stores instruction that, when executed by the processor, cause the controller to: receive a power request less than a current power output from the internal combustion engine; command the electric motive device to provide a supplemental power output based on the received power request; command the internal combustion engine to operate in a cylinder deactivation mode whereby at least one cylinder of a plurality of cylinders of the internal combustion engine is deactivated; responsive to determining that a power output of the internal combustion engine is substantially equivalent to the power request after commanding the internal combustion engine to operate in the cylinder deactivation mode, deactivate the electric motive device.
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10.发明公开公开(公告)号：US20230204000A1
公开(公告)日：2023-06-29
申请号：US17927573
申请日：2020-05-27
Applicant: Cummins Inc. , Tula Technology, Inc.
Inventor： Jennifer Kay Light-Holets , J. Steven Kolhouse , Christopher R. Nelson , Anant Puri , Xiaobo Song , Avra Brahma
CPC classification number: F02D41/024 , F01N3/202 , F02D41/0087 , F02M27/04 , F01N3/2033 , F02D41/0002 , F02D41/005 , F02D41/38 , F01N3/2066 , F01N3/2026 , F02D2041/389 , F02D2200/50 , F02D2200/0804
Abstract: A system includes an aftertreatment system heater of an exhaust aftertreatment system coupled to an engine A controller coupled to the aftertreatment system heater is configured to determine a condition of an exhaust gas from an engine and compare the condition to a predefined threshold. If the condition of the exhaust gas does not meet the predefined threshold, the controller is configured to determine whether an engine operating condition is met for activating a cylinder deactivation operating mode for the engine. If the engine operating condition is met, the controller is configured to operate the engine in the cylinder deactivation operating mode by deactivating a cylinder of a plurality of cylinders. If the engine operating condition is not met, the controller is configured to activate the aftertreatment system heater to heat the exhaust gas.
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