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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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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：US11428181B2
公开(公告)日：2022-08-30
申请号：US16829679
申请日：2020-03-25
Applicant: Cummins Inc.
Inventor： Avra Brahma , Yongsoon Yoon
Abstract: Systems and apparatuses include an aftertreatment system including a catalyst, and a controller coupled to the aftertreatment system. During a warmup period for an engine coupled to the catalyst, the controller is configured to determine a value of a catalyst heating metric indicative of an amount of emissions produced per unit of exhaust energy based on information received from the engine and the aftertreatment system, and control at least one of a turbocharger, a fuel injection system, or an Exhaust Gas Recirculation (EGR) system to reach a target value of the catalyst heating metric.
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公开(公告)号：US20210301743A1
公开(公告)日：2021-09-30
申请号：US16829679
申请日：2020-03-25
Applicant: Cummins Inc.
Inventor： Avra Brahma , Yongsoon Yoon
Abstract: Systems and apparatuses include an aftertreatment system including a catalyst, and a controller coupled to the aftertreatment system. During a warmup period for an engine coupled to the catalyst, the controller is configured to determine a value of a catalyst heating metric indicative of an amount of emissions produced per unit of exhaust energy based on information received from the engine and the aftertreatment system, and control at least one of a turbocharger, a fuel injection system, or an Exhaust Gas Recirculation (EGR) system to reach a target value of the catalyst heating metric.
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Patent Agency Ranking
公开(公告)号：US20190085782A1
公开(公告)日：2019-03-21
申请号：US16136680
申请日：2018-09-20
Applicant: Cummins Inc.
Inventor： Avra Brahma , Youngsoon Yoon
CPC classification number: F02D41/1454 , F02D41/0007 , F02D41/0072 , F02D41/0085 , F02D41/1448 , F02D41/1495 , F02D41/22 , F02D2041/1417 , F02D2041/288 , F02D2200/0402
Abstract: One embodiment is a method comprising operating an internal combustion engine system including multiple cylinders structured to combust a charge mixture and to output exhaust to an exhaust manifold, an electronic control system structured to control operation of the engine system and an exhaust manifold pressure (EMP) sensor structured to provide data to the electronic control system and performing an air-fuel ratio (AFR) imbalance diagnostic with the electronic control system. The AFR imbalance diagnostic may comprise the acts of processing the data to provide at least one output metric sample, determining an output metric statistic based on the at least one output metric sample, evaluating the output metric statistic relative to one or more predetermined criteria to identify an AFR imbalance condition, and providing an operator perceptible indication of the AFR imbalance condition.
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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：US20220381193A1
公开(公告)日：2022-12-01
申请号：US17884473
申请日：2022-08-09
Applicant: Cummins Inc.
Inventor： Avra Brahma , Yongsoon Yoon
Abstract: Systems and apparatuses include an engine, an aftertreatment system including a catalyst, and a controller coupled to the aftertreatment system and the engine. During a warmup period for an engine, the controller determines a value regarding a mass flow rate of exhaust gas based on information received from at least one of the engine or the aftertreatment system. The controller receives a target value regarding the mass flow rate of the exhaust gas. The controller controls at least one of the engine, the aftertreatment system, or at least one component associated therewith to reach or attempt to reach the target value regarding the mass flow rate of the exhaust gas.
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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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