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公开(公告)号:US10365258B2
公开(公告)日:2019-07-30
申请号:US15675019
申请日:2017-08-11
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor: Michael A. Smith , Christopher L. Whitt , Yong Miao
Abstract: A method for determining the hydrocarbon (HC) oxidation performance of an oxidation catalyst device (OC) includes communicating gas to the OC inlet over a time frame, measuring the NOx content of the OC outlet gas using a NOx sensor over the time frame, wherein the temperature of the OC increases over the time frame, and correlating an increased NOx measurement over the time frame to an increased OC HC oxidation performance. The NOx sensor can be operated in a low temperature mode during the time frame. The method can further include determining the temperature of the OC over the time frame and correlating the HC oxidation performance to the OC temperature, and/or correlating a maximum NOx concentration measured during the time frame to the OC temperature measured at the same time. HC slip through the OC can be identified when the measured NOx content of the OC outlet gas decreases.
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公开(公告)号:US10161276B2
公开(公告)日:2018-12-25
申请号:US15186836
申请日:2016-06-20
Applicant: GM Global Technology Operations LLC
Inventor: Yong Miao , Steven Felix , Kurt Alfred Wellenkotter
Abstract: A method and system for non-uniform catalyst heating for reducing exhaust gas emissions when the catalyst is below a predetermined light off temperature is provided. The method includes providing a catalyst formed of a plurality of electrically conductive subsections and at least one catalyst heating device that is operable to heat at least one of the plurality of electrically conductive subsections of the catalyst to form at least one predetermined non-uniform heating pattern. A heater control module is provided for controlling the operation of the at least one catalyst heating device. If the engine is in a cold start condition, then the heater control module causes the at least one catalyst heating device to heat at least one of the electrically conductive subsections of the catalyst to obtain a first predetermined non-uniform heating pattern.
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公开(公告)号:US20170157564A1
公开(公告)日:2017-06-08
申请号:US14962531
申请日:2015-12-08
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor: Shouxian Ren , Se H. Oh , Yong Miao
IPC: B01D53/94 , B01J29/072 , B01J29/076 , B01J23/63 , B01J37/02 , B01J23/30 , B01J23/28 , B01J23/22 , B01J35/00 , B01J29/068 , B01J23/50
CPC classification number: B01D53/9477 , B01D53/9418 , B01D53/944 , B01D2255/1023 , B01D2255/104 , B01D2255/2065 , B01D2255/20707 , B01D2255/20715 , B01D2255/20723 , B01D2255/2073 , B01D2255/20738 , B01D2255/20761 , B01D2255/20769 , B01D2255/20776 , B01D2255/20784 , B01D2255/2092 , B01D2255/30 , B01D2255/407 , B01D2255/50 , B01D2255/9022 , B01D2255/91 , B01D2258/012 , B01J23/22 , B01J23/28 , B01J23/30 , B01J23/50 , B01J23/63 , B01J29/061 , B01J29/068 , B01J29/072 , B01J29/076 , B01J35/0006 , B01J37/0244 , B01J37/0246 , Y02T10/24
Abstract: A dual-layer catalyst includes a substrate, a first layer disposed on the substrate, and a second layer disposed on the first layer. The first layer includes a first catalyst for storing NOx when the first catalyst has a temperature below an active temperature of a second catalyst. The first catalyst is to release the stored NOx when the first catalyst is heated to the active temperature of the second catalyst. The second layer includes the second catalyst for ammonia Selective Catalytic Reduction of the released NOx. The dual-layer catalyst is to be included in a catalytic converter and a catalyst system for reducing NOx emissions from a diesel engine, the NOx emissions including NOx emitted during a predetermined cold-start time period.
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公开(公告)号:US20190049418A1
公开(公告)日:2019-02-14
申请号:US15675019
申请日:2017-08-11
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor: Michael A. Smith , Christopher L. Whitt , Yong Miao
CPC classification number: G01N33/0037 , F01N3/103 , F01N11/007 , F01N2550/02 , F01N2560/023 , F01N2560/026 , F01N2900/1602 , F01N2900/1618
Abstract: A method for determining the hydrocarbon (HC) oxidation performance of an oxidation catalyst device (OC) includes communicating gas to the OC inlet over a time frame, measuring the NOx content of the OC outlet gas using a NOx sensor over the time frame, wherein the temperature of the OC increases over the time frame, and correlating an increased NOx measurement over the time frame to an increased OC HC oxidation performance. The NOx sensor can be operated in a low temperature mode during the time frame. The method can further comprise determining the temperature of the OC over the time frame and correlating the HC oxidation performance to the OC temperature, and/or correlating a maximum NOx concentration measured during the time frame to the OC temperature measured at the same time. HC slip through the OC can be identified when the measured NOx content of the OC outlet gas decreases.
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公开(公告)号:US20150345354A1
公开(公告)日:2015-12-03
申请号:US14294571
申请日:2014-06-03
Applicant: GM Global Technology Operations LLC
Inventor: Yong Miao
CPC classification number: F01N3/208 , F01N3/2066 , F01N3/2896 , F01N11/00 , F01N2610/02 , F01N2610/03 , F01N2610/1453 , F01N2900/1411 , Y02T10/24
Abstract: In one aspect, an injector assembly for injecting a fluid into an exhaust aftertreatment system is provided. The injector assembly includes a housing having an outlet orifice and an inner wall defining a passageway, the passageway fluidly coupled to the outlet orifice and configured to supply the fluid to the outlet orifice, and a valve having a longitudinal axis. The valve is oriented within the passageway and configured to translate along the longitudinal axis between a first position and a second position. A downstream end of the valve includes a tapered wall oriented at a first angle with respect to the longitudinal axis, and the housing inner wall is oriented at a second angle with respect to the longitudinal axis.
Abstract translation: 在一个方面,提供了一种用于将流体喷射到排气后处理系统中的喷射器组件。 喷射器组件包括具有出口孔和限定通道的内壁的壳体,该通道流体地联接到出口孔并且被配置成将流体供应到出口孔,以及具有纵向轴线的阀。 所述阀定向在所述通道内并且构造成沿着所述纵向轴线在第一位置和第二位置之间平移。 阀的下游端包括相对于纵向轴线以第一角度定向的锥形壁,并且壳体内壁相对于纵向轴线以第二角度定向。
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公开(公告)号:US20250132406A1
公开(公告)日:2025-04-24
申请号:US18490198
申请日:2023-10-19
Applicant: GM Global Technology Operations LLC
Inventor: Han Zhang , Yong Miao , Erin Efimoff
Abstract: A system for calculating the maximum power limit of a battery pack for an electric vehicle includes one or more controllers in electronic communication with the battery pack. A plurality of battery open circuit voltage look-up tables and a plurality of direct current internal resistance (DCIR) look-up tables are stored in memory of the one or more controllers.
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公开(公告)号:US10408103B1
公开(公告)日:2019-09-10
申请号:US15972572
申请日:2018-05-07
Applicant: GM Global Technology Operations LLC
Inventor: Yong Miao , Stefano Pellegrino
Abstract: A engine exhaust system includes a diesel oxidation catalyst (DOC) configured to receive the engine exhaust gases, a first electric heater coupled to the DOC, and a selective catalytic reduction (SCR) device in fluid communication with the DOC. The engine exhaust system further includes a second electric heater coupled to the DOC, a power switch controller in electronic communication with the first electric heater and the second electric heater, and a single power source electrically coupled to the power switch controller, the first electric heater, and the second electric heater. The power switch controller includes a switch to control a power distribution between the first electric heater and the second electric heater as a function of time.
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公开(公告)号:US20170362982A1
公开(公告)日:2017-12-21
申请号:US15186836
申请日:2016-06-20
Applicant: GM Global Technology Operations LLC
Inventor: Yong Miao , Steven Felix , Kurt Alfred Wellenkotter
CPC classification number: F01N3/2026 , F01N9/00 , F01N11/002 , F01N2560/06 , F01N2900/12 , F01N2900/1602 , F01N2900/1626 , F02D41/0255 , Y02T10/26 , Y02T10/47
Abstract: A method and system for non-uniform catalyst heating for reducing exhaust gas emissions when the catalyst is below a predetermined light off temperature is provided. The method includes providing a catalyst formed of a plurality of electrically conductive subsections and at least one catalyst heating device that is operable to heat at least one of the plurality of electrically conductive subsections of the catalyst to form at least one predetermined non-uniform heating pattern. A heater control module is provided for controlling the operation of the at least one catalyst heating device. If the engine is in a cold start condition, then the heater control module causes the at least one catalyst heating device to heat at least one of the electrically conductive subsections of the catalyst to obtain a first predetermined non-uniform heating pattern.
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公开(公告)号:US20180334939A1
公开(公告)日:2018-11-22
申请号:US15597636
申请日:2017-05-17
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor: Rahul Mital , Charles Solbrig , Yong Miao , David Brown
CPC classification number: F01N3/2066 , B01D53/9477 , B01D2255/1021 , B01D2255/1023 , B01D2255/1025 , B01D2255/1026 , B01D2255/1028 , B01D2255/2027 , B01D2255/2042 , B01D2255/20707 , B01D2255/20723 , B01D2255/20738 , B01D2255/20746 , B01D2255/20761 , B01D2255/20769 , B01D2255/20776 , B01D2255/402 , B01D2255/502 , B01D2255/504 , B01J35/04 , C23F11/00 , F01N3/035 , F01N3/106 , F01N3/2013 , F01N2530/02 , F01N2610/02 , F01N2610/10 , F01N2610/1453
Abstract: Electric heaters comprising corrosion resistant metals (CRM), and exhaust gas treatment systems incorporating the same, are provided. Exhaust gas treatment systems include selective catalytic reduction devices (SCR) disposed downstream from reductant injectors. Electric heaters can be disposed downstream from reductant injectors, and optionally contiguous with or incorporated with a catalytic composition of the SCR. CRMs resist corrosion to reductant, which includes t ammonia and/or nitrogen-rich substances capable of decomposing into ammonia, such as urea. CRMs include aluminum, chromium, iron, and one or more stabilizers. CRMs can include about 5.0% to about 7.25% aluminum, about 15% to about 25% chromium, up to about 0.30% stabilizers, and a balance comprising iron. Stabilizers can include hafnium, yttrium, and zirconium. Stabilizers can include about 0.001% to about 0.11% yttrium and about 0.001% to about 0.11% Hf.
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公开(公告)号:US10005031B2
公开(公告)日:2018-06-26
申请号:US14962531
申请日:2015-12-08
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor: Shouxian Ren , Se H. Oh , Yong Miao
IPC: F01N3/10 , B01D53/94 , B01J23/22 , B01J23/28 , B01J23/30 , B01J23/50 , B01J23/63 , B01J29/068 , B01J29/072 , B01J29/076 , B01J35/00 , B01J37/02
CPC classification number: B01D53/9477 , B01D53/9418 , B01D53/944 , B01D2255/1023 , B01D2255/104 , B01D2255/2065 , B01D2255/20707 , B01D2255/20715 , B01D2255/20723 , B01D2255/2073 , B01D2255/20738 , B01D2255/20761 , B01D2255/20769 , B01D2255/20776 , B01D2255/20784 , B01D2255/2092 , B01D2255/30 , B01D2255/407 , B01D2255/50 , B01D2255/9022 , B01D2255/91 , B01D2258/012 , B01J23/22 , B01J23/28 , B01J23/30 , B01J23/50 , B01J23/63 , B01J29/061 , B01J29/068 , B01J29/072 , B01J29/076 , B01J35/0006 , B01J37/0244 , B01J37/0246 , Y02T10/24
Abstract: A dual-layer catalyst includes a substrate, a first layer disposed on the substrate, and a second layer disposed on the first layer. The first layer includes a first catalyst for storing NOx when the first catalyst has a temperature below an active temperature of a second catalyst. The first catalyst is to release the stored NOx when the first catalyst is heated to the active temperature of the second catalyst. The second layer includes the second catalyst for ammonia Selective Catalytic Reduction of the released NOx. The dual-layer catalyst is to be included in a catalytic converter and a catalyst system for reducing NOx emissions from a diesel engine, the NOx emissions including NOx emitted during a predetermined cold-start time period.
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