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公开(公告)号:US20190049341A1
公开(公告)日:2019-02-14
申请号:US15883965
申请日:2018-01-30
CPC分类号: G01M15/104 , F01N3/2066 , F01N3/208 , F01N11/00 , F01N11/007 , F01N2550/05 , F01N2560/026 , F01N2560/14 , F01N2610/02 , F01N2610/146 , F01N2900/1616 , F01N2900/1622 , F01N2900/1818 , Y02A50/2325 , Y02T10/24 , Y02T10/47
摘要: A virtual diesel exhaust fluid (DEF) quality monitor repeatedly performs an intrusive test for disclosing use of adulterated DEF by injecting a controlled quantity of DEF into a diesel engine exhaust aftertreatment system upstream of an SCR catalyst while the engine operates and then processing certain data obtained from the test.
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公开(公告)号:US20140127098A1
公开(公告)日:2014-05-08
申请号:US14070662
申请日:2013-11-04
CPC分类号: F01N3/208 , B01D53/90 , B01D53/9409 , B01D53/9477 , B01D53/9495 , B01D2251/206 , B01D2257/404 , B01D2258/012 , F01N11/002 , F01N2560/06 , F01N2900/1616 , Y02T10/24 , Y02T10/47
摘要: A method for controlling injection of a reductant into an exhaust system of an internal combustion engine, which includes measuring temperature at a plurality of locations in the exhaust system relative to an SCR catalyst, determining an average temperature as a function of the measured temperatures, and controlling injecting of a reductant into the exhaust upstream of the catalyst as a function of the average temperature. The average temperature may be a weighted average where temperature measurements from at least some locations upstream of the SCR catalyst may be assigned greater weight than temperature measurements proximate the SCR catalyst.
摘要翻译: 一种用于控制将还原剂注入到内燃机的排气系统中的方法,其包括相对于SCR催化剂测量排气系统中的多个位置处的温度,确定作为测量温度的函数的平均温度,以及 根据平均温度控制将还原剂注入催化剂上游的排气中。 平均温度可以是加权平均值,其中来自SCR催化剂上游的至少一些位置处的温度测量可以被分配比接近SCR催化剂的温度测量更大的权重。
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公开(公告)号:US11994056B1
公开(公告)日:2024-05-28
申请号:US18118290
申请日:2023-03-07
IPC分类号: F01N9/00 , B60K13/04 , F01N3/023 , F01N3/025 , F01N3/035 , F01N3/08 , F01N3/20 , F01N3/36 , F01N11/00 , F01N13/00
CPC分类号: F01N9/002 , B60K13/04 , F01N3/0232 , F01N3/0253 , F01N3/035 , F01N3/0821 , F01N3/36 , F01N13/0097 , F01N3/023 , F01N3/0233 , F01N3/2093 , F01N9/005 , F01N9/007 , F01N11/005 , F01N11/007 , F01N2250/02 , F01N2410/04 , F01N2430/08 , F01N2560/07 , F01N2610/03 , F01N2610/148 , F01N2900/0408 , F01N2900/0601 , F01N2900/10 , F01N2900/1406 , F01N2900/1411 , F01N2900/1602 , F01N2900/1611 , F01N2900/1808
摘要: Estimating soot comprises connecting exhaust pipe to engine, exhaust pipe has diesel oxidation catalyst and diesel particulate filter. Fuel injector is connected to exhaust pipe upstream from diesel oxidation catalyst and diesel particulate filter. Delta exhaust pressure sensor measures difference in exhaust pressure at inlet and outlet to diesel particulate filter. Controller is connected to fuel injector and to delta exhaust pressure sensor. Controller determines when to conduct active regeneration of diesel particulate filter based on estimated amount of soot accumulated therein. Controller, in first regeneration mode, causes fuel injector to inject fuel at first rate into exhaust stream, and re-evaluates soot accumulated within diesel particulate filter under increased volumetric flow of exhaust stream. Controller, in second regeneration mode, causes fuel injector to inject fuel at second rate, larger than first rate, into exhaust stream to combust soot trapped in diesel particulate filter.
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公开(公告)号:US20140123629A1
公开(公告)日:2014-05-08
申请号:US13943474
申请日:2013-07-16
IPC分类号: F01N3/20
CPC分类号: F01N3/208 , B01D53/9409 , B01D53/9495 , B01D2251/2062 , F01N3/2066 , F01N11/00 , F01N2550/02 , F01N2560/026 , F01N2560/14 , F01N2900/08 , F01N2900/1402 , F01N2900/1616 , F01N2900/1621 , Y02T10/24 , Y02T10/47
摘要: A method of detecting ammonia in the exhaust system includes detecting a predetermined engine operating condition. Upon detecting the predetermined operating condition, the method determines a first NOx conversion efficiency of a catalyst at a first time T1. The method then injects a reactant into the exhaust upstream of the catalyst and determines a second NOx conversion efficiency at a second time T2. The method then processes the first and second NOx conversion efficiencies to determine whether an ammonia slip condition exists.
摘要翻译: 检测排气系统中的氨的方法包括检测预定的发动机运行状态。 在检测到预定操作条件时,该方法在第一时间T1确定催化剂的第一NOx转化效率。 然后,该方法将反应物注入到催化剂上游的排气中,并在第二时间T2确定第二NOx转化效率。 然后该方法处理第一和第二NOx转化效率以确定是否存在氨滑移条件。
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公开(公告)号:US20230287823A1
公开(公告)日:2023-09-14
申请号:US17692072
申请日:2022-03-10
CPC分类号: F01N3/208 , F01N11/00 , F01N2240/02 , F01N2550/05 , F01N2610/02 , F01N2610/105 , F01N2610/1486 , F01N2900/12 , F01N2900/1811
摘要: A Diesel Emissions Fluid (DEF) Thawing arrangement and method is provided for use with a vehicle having an engine, an Engine Control Module (ECM), an exhaust system, and a Selective Catalyst Reduction (SCR) catalytic device. A DEF injection system is connected to the exhaust system and to the ECM. A DEF tank is connected to the DEF injection system, and is provided with a Urea Quality Sensor (UQS). A coolant loop is connected to the engine and has a Coolant Control Valve (CCV) connected to a control module, and a coolant to DEF heat exchanger. A DEF temperature sensor and an ambient temperature sensor are connected to the control module. The control module is configured to trigger a CCV stuck open fault when the DEF tank temperature exceeds the ambient temperature by a threshold amount for a period of time.
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公开(公告)号:US20140182273A1
公开(公告)日:2014-07-03
申请号:US14071000
申请日:2013-11-04
CPC分类号: F02D41/1463 , B01D53/9409 , B01D53/9495 , B01D2251/2062 , F01N3/208 , F01N9/005 , F01N2560/026 , F01N2610/02 , F01N2900/1614 , F01N2900/1616 , F02D41/0275 , F02D41/1461 , Y02T10/24
摘要: A system and method for calculating quantity of ammonia stored on an SCR catalyst at various times during an interval of time by processing certain data, including the aggregate quantity of ammonia introduced into an exhaust flow during the interval of time, calculating the efficiency of catalytic conversion of NOx to N2 and H2O by ammonia at each of the various times by processing certain data, including NOx measurements obtained from upstream and downstream NOx sensors, and establishing a correlation between efficiency of catalytic conversion of NOx to N2 and H2O by ammonia and quantity of ammonia stored on the SCR catalyst over the interval of time which comprises calculated efficiency of catalytic conversion of NOx and calculated quantity of ammonia stored on the SCR catalyst at each of the various times.
摘要翻译: 一种用于通过处理某些数据(包括在时间间隔内引入排气流中的氨的总量)来计算在时间间隔内的不同时间在SCR催化剂上存储的氨的量的系统和方法,计算催化转化效率 通过处理某些数据,包括从上游和下游NOx传感器获得的NOx测量,以及建立氨与氨与N 2和H 2 O的催化转化效率之间的相关性,以及各种数量的氮 在SCR催化剂上存储的氨在一段时间内,其中包括计算的NOx催化转化效率和储存在SCR催化剂上的氨的计算量。
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公开(公告)号:US11808193B2
公开(公告)日:2023-11-07
申请号:US17692072
申请日:2022-03-10
CPC分类号: F01N3/208 , F01N11/00 , F01N2240/02 , F01N2550/05 , F01N2610/02 , F01N2610/105 , F01N2610/1486 , F01N2900/12 , F01N2900/1811
摘要: A Diesel Emissions Fluid (DEF) Thawing arrangement and method is provided for use with a vehicle having an engine, an Engine Control Module (ECM), an exhaust system, and a Selective Catalyst Reduction (SCR) catalytic device. A DEF injection system is connected to the exhaust system and to the ECM. A DEF tank is connected to the DEF injection system, and is provided with a Urea Quality Sensor (UQS). A coolant loop is connected to the engine and has a Coolant Control Valve (CCV) connected to a control module, and a coolant to DEF heat exchanger. A DEF temperature sensor and an ambient temperature sensor are connected to the control module. The control module is configured to trigger a CCV stuck open fault when the DEF tank temperature exceeds the ambient temperature by a threshold amount for a period of time.
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公开(公告)号:US10684196B2
公开(公告)日:2020-06-16
申请号:US15883965
申请日:2018-01-30
摘要: A virtual diesel exhaust fluid (DEF) quality monitor repeatedly performs an intrusive test for disclosing use of adulterated DEF by injecting a controlled quantity of DEF into a diesel engine exhaust aftertreatment system upstream of an SCR catalyst while the engine operates and then processing certain data obtained from the test.
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公开(公告)号:US08935915B2
公开(公告)日:2015-01-20
申请号:US14071000
申请日:2013-11-04
CPC分类号: F02D41/1463 , B01D53/9409 , B01D53/9495 , B01D2251/2062 , F01N3/208 , F01N9/005 , F01N2560/026 , F01N2610/02 , F01N2900/1614 , F01N2900/1616 , F02D41/0275 , F02D41/1461 , Y02T10/24
摘要: A system and method for calculating quantity of ammonia stored on an SCR catalyst at various times during an interval of time by processing certain data, including the aggregate quantity of ammonia introduced into an exhaust flow during the interval of time, calculating the efficiency of catalytic conversion of NOx to N2 and H2O by ammonia at each of the various times by processing certain data, including NOx measurements obtained from upstream and downstream NOx sensors, and establishing a correlation between efficiency of catalytic conversion of NOx to N2 and H2O by ammonia and quantity of ammonia stored on the SCR catalyst over the interval of time which comprises calculated efficiency of catalytic conversion of NOx and calculated quantity of ammonia stored on the SCR catalyst at each of the various times.
摘要翻译: 一种用于通过处理某些数据(包括在时间间隔内引入排气流中的氨的总量)来计算在时间间隔内的不同时间在SCR催化剂上存储的氨的量的系统和方法,计算催化转化效率 通过处理某些数据,包括从上游和下游NOx传感器获得的NOx测量,以及建立氨与氨与N 2和H 2 O的催化转化效率之间的相关性,以及各种数量的氮 在SCR催化剂上存储的氨在一段时间内,其中包括计算的NOx催化转化效率和储存在SCR催化剂上的氨的计算量。
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公开(公告)号:US20240264134A1
公开(公告)日:2024-08-08
申请号:US18105965
申请日:2023-02-06
IPC分类号: G01N33/00
CPC分类号: G01N33/00
摘要: A DEF quality sensor integrated into a DEF tank with removable control circuitry preferably includes a housing and control circuitry. The housing preferably includes a base housing portion and a detachable cover. A sensor opening is formed through a bottom of the DEF tank to receive an outside perimeter of the base housing portion. The base housing portion is sealed to the DEF tank with any suitable sealant. Most of the base housing portion is located inside the DEF tank. The detachable cover is located outside the DEF tank. The detachable cover includes the control circuitry. The detachable cover may be secured to a bottom of the base housing portion with any suitable attachment device or method. The improved removable DEF quality sensor includes the benefits of decreased replacement part storage capacity for parts supplies as well as improved ease of serviceability for repair.
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