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公开(公告)号：US20180142590A1
公开(公告)日：2018-05-24
申请号：US15866776
申请日：2018-01-10
Applicant: Cummins, Inc.
Inventor： Aniket Gupta , Michael J. Cunningham , Michael Haas , Govindarajan Kothandaraman
CPC classification number: F01N3/035 , F01N3/0835 , F01N3/0842 , F01N3/103 , F01N3/2066 , F01N11/00 , F01N13/0093 , F01N2550/02 , F01N2560/021 , F01N2560/026 , F01N2560/06 , F01N2560/14 , F01N2610/02 , F01N2900/1402 , F01N2900/1616 , Y02T10/24 , Y02T10/47
Abstract: A method includes interpreting NOx data indicative of an amount of NOx exiting an engine and an amount of NOx exiting an exhaust aftertreatment system coupled to the engine, determining a NOx conversion efficiency fault is present based on the amount of NOx exiting the engine and the amount of NOx exiting the exhaust aftertreatment system, and determining at least one of a selective catalytic reduction (SCR) catalyst of the exhaust aftertreatment system and a diesel particulate filter having a coating of a SCR reaction catalyst (DPF-SCR) of the exhaust aftertreatment system are responsible for the NOx conversion efficiency fault based on at least one of a reductant slip amount and a NOx conversion value across at least one of the SCR catalyst and the DPF-SCR.
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公开(公告)号：US09879580B2
公开(公告)日：2018-01-30
申请号：US14830112
申请日：2015-08-19
Applicant: Cummins, Inc.
Inventor： Aniket Gupta , Michael J. Cunningham , Michael Haas , Govindarajan Kothandaraman
CPC classification number: F01N3/035 , F01N3/0835 , F01N3/0842 , F01N3/103 , F01N3/2066 , F01N11/00 , F01N13/0093 , F01N2550/02 , F01N2560/021 , F01N2560/026 , F01N2560/06 , F01N2560/14 , F01N2610/02 , F01N2900/1402 , F01N2900/1616 , Y02T10/24 , Y02T10/47
Abstract: An apparatus includes a nitrogen oxide (NOx) module and a selective catalytic reduction (SCR) diagnostic module. The NOx module is in exhaust gas communication with an exhaust flow of an exhaust aftertreatment system from an engine. The NOx module is structured to interpret NOx data indicative of an amount of NOx exiting the engine and an amount of NOx exiting the exhaust aftertreatment system, and determine a NOx conversion efficiency fault is present based on the amount of NOx exiting the engine and the amount of NOx exiting the exhaust aftertreatment system. The SCR diagnostic module is structured to determine at least one of a SCR catalyst and a diesel particulate filter including a coating of a SCR reaction catalyst (DPF-SCR) are responsible for the NOx conversion efficiency fault based on at least one of a reductant slip amount and a NOx conversion value across at least one of the SCR catalyst and the DPF-SCR.
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53.发明授权公开(公告)号：US09845754B2
公开(公告)日：2017-12-19
申请号：US14578912
申请日：2014-12-22
Applicant: Cummins Inc.
Inventor： Carlos Alcides Lana , David J. Stroh , Samuel C. Geckler , Marten H. Dane , Anthony Kyle Perfetto , Karthik Kappaganthu , Govindarajan Kothandaraman
IPC: F02M25/07 , F02D41/14 , F02P5/04 , F02D41/00 , F02P5/15 , F02D37/02 , F02M26/43 , F02M26/05 , F02D35/02 , F02M26/46
CPC classification number: F02D41/1439 , F02D35/02 , F02D35/021 , F02D35/023 , F02D35/027 , F02D37/02 , F02D41/0052 , F02D41/0055 , F02D41/0065 , F02D41/008 , F02D41/1448 , F02D41/1451 , F02D41/1452 , F02D41/1454 , F02D2041/1431 , F02D2041/147 , F02D2200/1015 , F02D2250/18 , F02M26/05 , F02M26/43 , F02M26/46 , F02P5/045 , F02P5/1516 , Y02T10/46 , Y02T10/47
Abstract: A system includes an internal combustion engine having a number of cylinders, with at least one of the cylinder(s) being a primary EGR cylinder that is dedicated to provided EGR flow during at least some operating conditions. A controller is structured to control combustion conditions in the cylinders in response to one or more operating conditions associated with the engine.
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公开(公告)号：US09683508B2
公开(公告)日：2017-06-20
申请号：US14959232
申请日：2015-12-04
Applicant: Cummins Inc.
Inventor： David Stroh , Govindarajan Kothandaraman , Carlos Alcides Lana , Karim A. Azizou
CPC classification number: F02D41/2496 , F02D41/0002 , F02D41/1497 , F02D41/345 , F02D2250/18 , F02D2250/21 , F02D2250/22 , F02P5/045 , Y02T10/42
Abstract: A system comprising an air actuator configured to control air delivered to an engine; a fuel actuator configured to control fuel delivered to an engine; and a controller configured to: actuate the air actuator in response to a first torque signal; and actuate the fuel actuator in response to a second torque signal.
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Patent Agency Ranking
公开(公告)号：US09683507B2
公开(公告)日：2017-06-20
申请号：US14263106
申请日：2014-04-28
Applicant: Cummins Inc.
Inventor： Aleksey Yezerets , Timothy R. Frazier , Marten H. Dane , Samuel C. Geckler , Govindarajan Kothandaraman
CPC classification number: F02D41/1454 , F01N3/035 , F01N3/101 , F01N9/002 , F01N11/005 , F01N11/007 , F01N2550/04 , F01N2560/025 , F01N2900/0416 , F01N2900/1602 , F01N2900/1606 , F02D41/029 , F02D41/1408 , F02D41/1441 , F02D41/146 , F02D2200/0802 , F02D2200/0812 , Y02T10/22 , Y02T10/24 , Y02T10/47
Abstract: A system includes an internal combustion ignition engine with an exhaust gas flow, a particulate filter in the exhaust gas flow, a NOx reduction catalyst in the exhaust gas flow downstream of the particulate filter, a first oxygen sensor coupled to the exhaust gas flow downstream of the NOx reduction catalyst, and a second oxygen sensor coupled to the exhaust gas flow between the particulate filter and the NOx reduction catalyst. A controller includes an exhaust conditions module that interprets a first oxygen signal from the first oxygen sensor and a second oxygen signal from the second oxygen sensor and a combustion control module that commands a high engine-out air-fuel ratio when the first oxygen signal indicates a low oxygen content and commands a low engine-out air-fuel ratio when the first oxygen signal indicates a high oxygen content.
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公开(公告)号：US09587617B2
公开(公告)日：2017-03-07
申请号：US14565882
申请日：2014-12-10
Applicant: Cummins Inc
CPC classification number: F02P5/1516 , F02P9/002 , Y02T10/46
Abstract: Systems and methods are disclosed for adjusting the spark timing of an internal combustion engine. According to at least one aspect of the present disclosure, the system includes an exhaust gas recirculation (EGR) system for recirculating exhaust gas flow from at least one primary EGR cylinder of an engine into an intake system prior to combustion. According to at least one other aspect of the present disclosure, the method includes estimating a dynamic EGR fraction of exhaust gas directed into the intake system via the EGR system, estimating a steady-state EGR fraction of exhaust gas directed into the intake system at the changed mass air flow rate, computing a difference between the dynamic fraction and steady-state fraction to determine a change in EGR fraction, and applying a gain factor to the change in EGR fraction to determine a desired spark timing adjustment.
Abstract translation: 公开了用于调节内燃机的火花正时的系统和方法。 根据本公开的至少一个方面，该系统包括废气再循环（EGR）系统，用于在燃烧之前使排气流从发动机的至少一个主EGR气缸再循环到进气系统中。 根据本公开的至少另一方面，所述方法包括：经由所述EGR系统估计引导到所述进气系统中的排气的动态EGR分数，估计在所述进气系统中引导的废气的稳态EGR分数 改变质量空气流量，计算动态分数和稳态分数之间的差以确定EGR分数的变化，以及将增益因子应用于EGR分数的变化以确定期望的火花正时调整。
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公开(公告)号：US20160169186A1
公开(公告)日：2016-06-16
申请号：US14565882
申请日：2014-12-10
Applicant: Cummins Inc,
CPC classification number: F02P5/1516 , F02P9/002 , Y02T10/46
Abstract: Systems and methods are disclosed for adjusting the spark timing of an internal combustion engine. According to at least one aspect of the present disclosure, the system includes an exhaust gas recirculation (EGR) system for recirculating exhaust gas flow from at least one primary EGR cylinder of an engine into an intake system prior to combustion. According to at least one other aspect of the present disclosure, the method includes estimating a dynamic EGR fraction of exhaust gas directed into the intake system via the EGR system, estimating a steady-state EGR fraction of exhaust gas directed into the intake system at the changed mass air flow rate, computing a difference between the dynamic fraction and steady-state fraction to determine a change in EGR fraction, and applying a gain factor to the change in EGR fraction to determine a desired spark timing adjustment.
Abstract translation: 公开了用于调节内燃机的火花正时的系统和方法。 根据本公开的至少一个方面，该系统包括废气再循环（EGR）系统，用于在燃烧之前使排气流从发动机的至少一个主EGR气缸再循环到进气系统中。 根据本公开的至少另一方面，所述方法包括：经由所述EGR系统估计引导到所述进气系统中的排气的动态EGR分数，估计在所述进气系统中引导的废气的稳态EGR分数 改变质量空气流量，计算动态分数和稳态分数之间的差以确定EGR分数的变化，以及将增益因子应用于EGR分数的变化以确定期望的火花正时调整。
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公开(公告)号：US20140109883A1
公开(公告)日：2014-04-24
申请号：US14044368
申请日：2013-10-02
Applicant: Cummins Inc.
Inventor： Yongjie Zhu , Vivek Anand Sujan , Govindarajan Kothandaraman
IPC: F02M25/07
CPC classification number: F02M26/00 , F02D11/105 , F02D41/0007 , F02D41/0052 , F02D41/1402 , F02D41/1456 , F02D41/1461 , F02D2041/1409 , F02D2041/1418 , F02D2041/1422 , Y02T10/144 , Y02T10/47
Abstract: Methods are disclosed for reducing the variability of particulate emissions in an exhaust stream from an internal combustion engine using a lambda error and/or a NOx error to control an exhaust gas recirculation fraction and/or a mass charge flow control. The methods include operating a controller to adjust the engine gas recirculation fraction and/or the mass charge flow control.
Abstract translation: 公开了用于减少来自内燃机的排气流中使用λ误差和/或NOx误差来控制废气再循环分数和/或质量流量控制的颗粒物排放变化的方法。 这些方法包括操作控制器来调节发动机气体再循环分数和/或质量流量控制。
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公开(公告)号：US20130131955A1
公开(公告)日：2013-05-23
申请号：US13646891
申请日：2012-10-08
Applicant: Cummins Inc.
Inventor： Ashwin Vyas , Vivek A. Sujan , Andrew W. Osburn , Abdul Ofoli , Govindarajan Kothandaraman , Karim Azizou
IPC: F02D41/00
CPC classification number: F02D41/0002 , F02D41/18 , F02D41/222 , F02D41/2474
Abstract: Systems and methods for correcting mass airflow sensor drift include an operation conditions module to interpret a base calibration function, a MAF sensor input value, and a current operating condition. A MAF correction module determines an expected MAF value in response to the current operating condition and a predetermined operating condition. The MAF correction module will also determine an adjusted MAF value in response to the expected MAF value, the base calibration function, and the MAF sensor input value. A MAF reporting module is structured to provide the adjusted MAF value.
Abstract translation: 用于校正质量气流传感器漂移的系统和方法包括解释基准校准功能，MAF传感器输入值和当前操作条件的操作条件模块。 MAF校正模块响应于当前操作条件和预定操作条件确定预期MAF值。 MAF校正模块还将根据预期的MAF值，基准校准功能和MAF传感器输入值确定调整的MAF值。 MAF报告模块的结构是提供调整后的MAF值。
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