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1.发明申请SELECTIVE CYLINDER DEACTIVATION APPARATUS AND METHOD FOR HIGH POWER DIESEL ENGINES 有权高功率柴油发动机的选择性气缸停止装置和方法公开(公告)号：US20150377171A1
公开(公告)日：2015-12-31
申请号：US14320061
申请日：2014-06-30
Applicant: Cummins Inc.
CPC classification number: F02D17/02 , F02D41/0082 , F02D41/0087 , F02D41/38 , F02D2200/0602 , F02D2200/1002 , F02D2200/101 , F02D2250/36 , F02D2250/38
Abstract: Various embodiments relate to a method of operating an engine system with injectors having nozzle sac volume. The engine system may be a four-stroke, high power engine having a high-pressure common-rail injection system. A number of engine cylinders to fire is selected based on a fuel injection quantity per selected engine cylinder such that a nitrogen oxides (NOx) emission is less than a first predetermined threshold and a smoke value is less than a second predetermined threshold. The fuel injection quantity per cylinder may be higher than a nominal fuel injection quantity to improve fuel injector spray characteristics. The exhaust can be mixed with fresh air blowout from deactivated cylinders to further reduce smoke value. The engine system is operated with a firing pattern for the selected number of cylinders to fire.
Abstract translation: 各种实施例涉及使用具有喷嘴囊体积的喷射器操作发动机系统的方法。 发动机系统可以是具有高压共轨喷射系统的四冲程高功率发动机。 基于每个选择的发动机气缸的燃料喷射量来选择多个发动机气缸，使得氮氧化物（NOx）排放小于第一预定阈值，烟值小于第二预定阈值。 每个气缸的燃料喷射量可以高于标称燃料喷射量，以改善燃料喷射器喷射特性。 废气可以从停用的汽缸与新鲜的空气喷射混合，以进一步降低烟雾值。 发动机系统使用点火模式操作所选择的气缸数量。
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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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3.发明授权Selective cylinder deactivation apparatus and method for high power diesel engines 有权大功率柴油发动机选择性气缸停用装置及方法公开(公告)号：US09587567B2
公开(公告)日：2017-03-07
申请号：US14320061
申请日：2014-06-30
Applicant: Cummins Inc.
CPC classification number: F02D17/02 , F02D41/0082 , F02D41/0087 , F02D41/38 , F02D2200/0602 , F02D2200/1002 , F02D2200/101 , F02D2250/36 , F02D2250/38
Abstract: Various embodiments relate to a method of operating an engine system with injectors having nozzle sac volume. The engine system may be a four-stroke, high power engine having a high-pressure common-rail injection system. A number of engine cylinders to fire is selected based on a fuel injection quantity per selected engine cylinder such that a nitrogen oxides (NOx) emission is less than a first predetermined threshold and a smoke value is less than a second predetermined threshold. The fuel injection quantity per cylinder may be higher than a nominal fuel injection quantity to improve fuel injector spray characteristics. The exhaust can be mixed with fresh air blowout from deactivated cylinders to further reduce smoke value. The engine system is operated with a firing pattern for the selected number of cylinders to fire.
Abstract translation: 各种实施例涉及使用具有喷嘴囊体积的喷射器操作发动机系统的方法。 发动机系统可以是具有高压共轨喷射系统的四冲程高功率发动机。 基于每个选择的发动机气缸的燃料喷射量来选择多个发动机气缸，使得氮氧化物（NOx）排放小于第一预定阈值，烟值小于第二预定阈值。 每个气缸的燃料喷射量可以高于标称燃料喷射量，以改善燃料喷射器喷射特性。 废气可以从停用的汽缸与新鲜的空气喷射混合，以进一步降低烟雾值。 发动机系统使用点火模式操作所选择的气缸数量。
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4.发明公开公开(公告)号：US20240133326A1
公开(公告)日：2024-04-25
申请号：US18402682
申请日：2024-01-02
Applicant: Cummins Inc.
Inventor： Todd C. Bouws , Ankit Raghunath Lad , Joshua A. Lantz , Boopathi Singalandapuram Mahadevan , Ian W. McGiffen , Douglas A. Roxbury
CPC classification number: F01N3/025 , F01N3/24 , F01N9/002 , F01N13/009 , F02D41/04 , F02D41/16 , F01N2900/1606 , F02D2200/0812
Abstract: Systems and methods for removing soot in an aftertreatment system are disclosed. A method includes: receiving data regarding an exhaust gas flow rate of exhaust gas; receiving data regarding a selective catalytic reduction (SCR) inlet temperature; determining an adsorption amount of soot in the exhaust aftertreatment system based on the exhaust gas flow rate of the exhaust gas and the SCR inlet temperature; comparing the adsorption amount of soot to a predefined adsorption amount limit; in response to the adsorption amount of soot exceeding the predefined adsorption amount limit; initiating an exhaust cleaning event to remove at least some accumulated soot in the exhaust aftertreatment system; receiving exhaust gas data during the exhaust cleaning event; determining a desorption amount of soot based on the exhaust gas data; comparing the desorption amount of soot to a predefined desorption limit; and ceasing the exhaust cleaning event based on the comparison.
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公开(公告)号：US10533514B2
公开(公告)日：2020-01-14
申请号：US15578924
申请日：2017-06-02
Applicant: CUMMINS INC.
Inventor： Phanindra V. Garimella , John L. Hoehne , Ian W. McGiffen , Chandan Mahato , Boopathi Singalandapuram Mahadevan , Pagalavan Mathari Bakthavatsalam , Travis Alva Anderson
Abstract: A method of controlling a fuel injector comprises measuring a pressure in a cylinder of an engine with a pressure sensor and determining at least one of a crank angle and a crank speed with a crank sensor. The method also comprises calculating a net indicated mean effective pressure of the cylinder from the measured value of the pressure sensor and the determined value of the crank sensor. Also, the method comprises adjusting a fueling parameter of a fuel injector for the cylinder in response to the difference between the calculated net indicated mean effective pressure and a reference mean effective pressure indicates a change in power of the engine. Alternatively, the method may adjust the fueling parameter based on a power feedback signal for the engine.
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Patent Agency Ranking
公开(公告)号：US20180149105A1
公开(公告)日：2018-05-31
申请号：US15873972
申请日：2018-01-18
Applicant: Cummins Inc.
Inventor： John L. Hoehne , Ian W. McGiffen , Chandan Mahato , Paul Daniel Borisuk , Boopathi Singalandapuram Mahadevan
CPC classification number: F02D41/1446 , F01N3/2066 , F01N11/002 , F01N2430/00 , F01N2900/1404 , F01N2900/1406 , F01N2900/1602 , F02B29/0406 , F02B37/00 , F02B37/186 , F02D41/0007 , F02D41/0245 , F02D2200/0406 , F02D2200/0802 , F02D2250/36 , F02M26/05 , Y02T10/144 , Y02T10/146 , Y02T10/24 , Y02T10/26 , Y02T10/47
Abstract: A system and method for controlling a temperature of an exhaust gas at an inlet of a selective catalytic reduction system during at least certain low air density conditions. The system may detect an air density value upstream of an internal combustion engine of an engine system, such as, for example, at an inlet of a compressor. Using the detected air density, one of a plurality of relationships between an engine speed and an outputted engine power, as a function of the detected air density value, may be selected for use in determining what combination of engine speed(s) and/or engine power(s) will produce an exhaust gas that is within a target exhaust gas temperature. Using the selected relationship, at least one of the engine speed and the engine power may be adjusted to at least assist in attaining the target exhaust gas temperature.
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公开(公告)号：US11898480B2
公开(公告)日：2024-02-13
申请号：US17902241
申请日：2022-09-02
Applicant: Cummins Inc.
Inventor： Todd C. Bouws , Ankit Raghunath Lad , Joshua A. Lantz , Boopathi Singalandapuram Mahadevan , Ian W. McGiffen , Douglas A. Roxbury
CPC classification number: F01N3/025 , F01N3/24 , F01N9/002 , F01N13/009 , F02D41/04 , F02D41/16 , F01N2900/1606 , F02D2200/0812
Abstract: Systems and methods for removing accumulated soot in an aftertreatment system are disclosed herein. A method includes: determining, by a controller, an adsorption amount of soot in an exhaust aftertreatment system; comparing, by the controller, the adsorption amount of soot to a predefined adsorption amount limit; in response to the adsorption amount exceeding the predefined adsorption amount limit, initiating, by the controller, an exhaust cleaning event to remove at least some accumulated soot in the exhaust aftertreatment system; receiving, by the controller, exhaust gas data during the exhaust cleaning event; determining, by the controller, a desorption amount of soot based on the exhaust gas data; comparing, by the controller, the desorption amount of soot to a predefined desorption limit; and ceasing, by the controller, the exhaust cleaning event based on the comparison.
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公开(公告)号：US20220412238A1
公开(公告)日：2022-12-29
申请号：US17902241
申请日：2022-09-02
Applicant: Cummins Inc.
Inventor： Todd C. Bouws , Ankit Raghunath Lad , Joshua A. Lantz , Boopathi Singalandapuram Mahadevan , Ian W. McGiffen , Douglas A. Roxbury
Abstract: Systems and methods for removing accumulated soot in an aftertreatment system are disclosed herein. A method includes: determining, by a controller, an adsorption amount of soot in an exhaust aftertreatment system; comparing, by the controller, the adsorption amount of soot to a predefined adsorption amount limit; in response to the adsorption amount exceeding the predefined adsorption amount limit, initiating, by the controller, an exhaust cleaning event to remove at least some accumulated soot in the exhaust aftertreatment system; receiving, by the controller, exhaust gas data during the exhaust cleaning event; determining, by the controller, a desorption amount of soot based on the exhaust gas data; comparing, by the controller, the desorption amount of soot to a predefined desorption limit; and ceasing, by the controller, the exhaust cleaning event based on the comparison.
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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：US10480441B2
公开(公告)日：2019-11-19
申请号：US15873972
申请日：2018-01-18
Applicant: Cummins Inc.
Inventor： John L. Hoehne , Ian W. McGiffen , Chandan Mahato , Paul Daniel Borisuk , Boopathi Singalandapuram Mahadevan
IPC: F02D41/00 , F02D41/14 , F02B29/04 , F02M26/05 , F02D41/02 , F01N3/20 , F01N11/00 , F02B37/18 , F02B37/00
Abstract: A system and method for controlling a temperature of an exhaust gas at an inlet of a selective catalytic reduction system during at least certain low air density conditions. The system may detect an air density value upstream of an internal combustion engine of an engine system, such as, for example, at an inlet of a compressor. Using the detected air density, one of a plurality of relationships between an engine speed and an outputted engine power, as a function of the detected air density value, may be selected for use in determining what combination of engine speed(s) and/or engine power(s) will produce an exhaust gas that is within a target exhaust gas temperature. Using the selected relationship, at least one of the engine speed and the engine power may be adjusted to at least assist in attaining the target exhaust gas temperature.
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