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1.发明申请SYSTEM AND METHOD FOR DETECTING LOW QUALITY REDUCTANT AND CATALYST DEGRADATION IN SELECTIVE CATALYTIC REDUCTION SYSTEMS 有权用于检测选择性催化还原系统中低质量降低和催化降解的系统和方法公开(公告)号：US20120085082A1
公开(公告)日：2012-04-12
申请号：US12974366
申请日：2010-12-21
CPC分类号： F01N3/208 , F01N11/00 , F01N13/009 , F01N2550/02 , F01N2550/05 , F01N2900/1616 , F01N2900/1621 , Y02T10/24 , Y02T10/47
摘要： A control system for a selective catalytic reduction (SCR) system includes a conversion efficiency determination module, an ammonia slip determination module, and a diagnostic module. The conversion efficiency determination module determines a conversion efficiency of an SCR catalyst. The ammonia slip determination module determines an amount of ammonia slip across the SCR catalyst when the conversion efficiency is less than a predetermined threshold. The diagnostic module determines pass/fail statuses of a reductant supply and the SCR catalyst based on the amount of ammonia slip and at least one ammonia slip threshold.
摘要翻译： 用于选择性催化还原（SCR）系统的控制系统包括转换效率确定模块，氨滑移确定模块和诊断模块。 转换效率确定模块确定SCR催化剂的转换效率。 当转换效率小于预定阈值时，氨滑移确定模块确定SCR催化剂上的氨滑移量。 诊断模块基于氨滑移量和至少一个氨滑移阈值来确定还原剂供应源和SCR催化剂的通过/失败状态。
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2.发明授权System and method for detecting low quality reductant and catalyst degradation in selective catalytic reduction systems 有权用于检测选择性催化还原体系中低质量还原剂和催化剂降解的系统和方法公开(公告)号：US08495862B2
公开(公告)日：2013-07-30
申请号：US12974366
申请日：2010-12-21
IPC分类号： F01N11/00
CPC分类号： F01N3/208 , F01N11/00 , F01N13/009 , F01N2550/02 , F01N2550/05 , F01N2900/1616 , F01N2900/1621 , Y02T10/24 , Y02T10/47
摘要： A control system for a selective catalytic reduction (SCR) system includes a conversion efficiency determination module, an ammonia slip determination module, and a diagnostic module. The conversion efficiency determination module determines a conversion efficiency of an SCR catalyst. The ammonia slip determination module determines an amount of ammonia slip across the SCR catalyst when the conversion efficiency is less than a predetermined threshold. The diagnostic module determines pass/fail statuses of a reductant supply and the SCR catalyst based on the amount of ammonia slip and at least one ammonia slip threshold.
摘要翻译： 用于选择性催化还原（SCR）系统的控制系统包括转换效率确定模块，氨滑移确定模块和诊断模块。 转换效率确定模块确定SCR催化剂的转换效率。 当转换效率小于预定阈值时，氨滑移确定模块确定SCR催化剂上的氨滑移量。 诊断模块基于氨滑移量和至少一个氨滑移阈值来确定还原剂供应源和SCR催化剂的通过/失败状态。
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3.发明申请METHOD AND APPARATUS FOR MONITORING A REDUCTANT INJECTION SYSTEM IN AN EXHAUST AFTERTREATMENT SYSTEM 有权用于在排气系统中监测减少注射系统的方法和装置公开(公告)号：US20110083424A1
公开(公告)日：2011-04-14
申请号：US12576399
申请日：2009-10-09
CPC分类号： F01N11/00 , F01N3/208 , F01N2550/05 , F01N2610/02 , F01N2610/144 , F01N2900/0418 , F01N2900/1806 , F01N2900/1808 , F01N2900/1812 , F01N2900/1822 , Y02T10/24 , Y02T10/47
摘要： An internal combustion engine operating at a lean air/fuel ratio includes a reductant injection system configured to dispense reductant into an exhaust gas feedstream upstream of a selective catalytic reduction device. The reductant injection system includes a reductant delivery system fluidly coupled to a reductant dispensing device that is configured to dispense the reductant. A method for monitoring the reductant injection system includes commanding the reductant dispensing device to dispense reductant at a prescribed reductant flowrate, controlling the reductant delivery system to a preferred operating state, monitoring operation of the reductant delivery system and estimating a reductant flowrate as a function of the monitored operation of the reductant delivery system, and diagnosing operation of the reductant injection system as a function of the prescribed reductant flowrate and the estimated reductant flowrate.
摘要翻译： 以稀薄空气/燃料比工作的内燃机包括还原剂喷射系统，其配置成将还原剂分配到选择性催化还原装置上游的废气进料流中。 还原剂注射系统包括流体耦合到还原剂分配装置的还原剂递送系统，其被配置成分配还原剂。 用于监测还原剂注射系统的方法包括命令还原剂分配装置以规定的还原剂流量分配还原剂，将还原剂递送系统控制到优选的操作状态，监测还原剂递送系统的操作并估计还原剂流量作为 还原剂输送系统的监测操作，以及根据规定的还原剂流速和估计的还原剂流速来诊断还原剂注入系统的操作。
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公开(公告)号：US09133750B2
公开(公告)日：2015-09-15
申请号：US12683740
申请日：2010-01-07
CPC分类号： F01N3/208 , F01N2560/026 , F01N2610/02 , F01N2900/1614 , Y02T10/24
摘要： A method and control system for a selective catalytic reduction (SCR) catalytic converter and an ammonia dosing module that stores ammonia in a selective catalyst reducing (SCR) catalyst and that depletes the ammonia level by discontinuing or reducing dosing. The control system also includes an SCR conversion efficiency module that determines an SCR efficiency. An SCR efficiency comparison module compares the SCR efficiency to an efficiency threshold and generates a fault indicator when the SCR efficiency is not above the efficiency threshold.
摘要翻译： 用于选择性催化还原（SCR）催化转化器和氨计量模块的方法和控制系统，其将氨存储在选择性催化还原（SCR）催化剂中，并通过中断或减少剂量来消耗氨水平。 该控制系统还包括SCR转换效率模块，其确定SCR效率。 SCR效率比较模块将SCR效率与效率阈值进行比较，当SCR效率不高于效率阈值时，生成故障指示器。
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公开(公告)号：US20110023456A1
公开(公告)日：2011-02-03
申请号：US12683740
申请日：2010-01-07
CPC分类号： F01N3/208 , F01N2560/026 , F01N2610/02 , F01N2900/1614 , Y02T10/24
摘要： A method and control system for a selective catalytic reduction (SCR) catalytic converter and an ammonia dosing module that stores ammonia in a selective catalyst reducing (SCR) catalyst and that depletes the ammonia level by discontinuing or reducing dosing. The control system also includes an SCR conversion efficiency module that determines an SCR efficiency. An SCR efficiency comparison module compares the SCR efficiency to an efficiency threshold and generates a fault indicator when the SCR efficiency is not above the efficiency threshold.
摘要翻译： 用于选择性催化还原（SCR）催化转化器和氨计量模块的方法和控制系统，其将氨存储在选择性催化还原（SCR）催化剂中，并通过中断或减少剂量来消耗氨水平。 该控制系统还包括SCR转换效率模块，其确定SCR效率。 SCR效率比较模块将SCR效率与效率阈值进行比较，当SCR效率不高于效率阈值时，生成故障指示器。
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6.发明申请UREA INJECTOR DIAGNOSTICS USING SPECTRAL ANALYSIS FOR SCR NOX REDUCTION SYSTEM 审中-公开尿素注射器诊断使用光谱分析用于SCR NOX还原系统公开(公告)号：US20120286063A1
公开(公告)日：2012-11-15
申请号：US13105991
申请日：2011-05-12
CPC分类号： F01N3/208 , F01N3/103 , F01N11/00 , F01N13/009 , F01N2550/05 , F01N2560/026 , F01N2610/146 , F01N2900/1808 , Y02T10/24 , Y02T10/47
摘要： A method to indicate an injector fault in a urea dosing module in an aftertreatment system includes monitoring a control command for the urea dosing module, determining a carry frequency for the control command, monitoring a delivery line pressure for the delivery line, evaluating the delivery line pressure at the carry frequency, and indicating the injector fault based upon the evaluating.
摘要翻译： 一种用于指示后处理系统中的尿素计量模块中的喷射器故障的方法包括监测尿素计量模块的控制命令，确定控制命令的进位频率，监测输送管线的输送管线压力，评估输送管线 在进位频率下的压力，并基于评估指示喷射器故障。
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7.发明授权Method and apparatus for monitoring a reductant injection system in an exhaust aftertreatment system 有权用于在排气后处理系统中监测还原剂注射系统的方法和装置公开(公告)号：US08776503B2
公开(公告)日：2014-07-15
申请号：US12885821
申请日：2010-09-20
IPC分类号： F01N3/20
CPC分类号： F01N11/00 , F01N3/208 , F01N2550/05 , F01N2900/0418 , F01N2900/1808 , F01N2900/1812 , F01N2900/1821 , Y02T10/24 , Y02T10/47
摘要： A reductant injector is configured to dispense a reductant into an exhaust gas feedstream of an internal combustion engine upstream of a selective catalytic reduction device. The reductant injector of a reductant injection system is monitored by generating injector pulsewidth commands corresponding to a prescribed reductant flowrate, monitoring the injector pulsewidth commands, verifying the prescribed reductant flowrate corresponds to the injector pulsewidth commands, monitoring a fluidic pressure in the reductant injection system, estimating a first injected quantity of the reductant corresponding to the injector pulsewidth commands, estimating a second injected quantity of the reductant corresponding to the fluidic pressure in the reductant injection system, and comparing the first and second injected quantities of reductant.
摘要翻译： 还原剂喷射器构造成将还原剂分配到选择性催化还原装置上游的内燃机的废气进料流中。 通过产生对应于规定的还原剂流量的喷射脉冲宽度命令来监测还原剂喷射系统的还原剂喷射器，监测喷射器脉冲宽度命令，验证与喷射器脉冲宽度命令对应的规定的还原剂流量，监测还原剂喷射系统中的流体压力， 估计对应于喷射脉冲宽度指令的还原剂的第一喷射量，估计对应于还原剂喷射系统中的流体压力的还原剂的第二喷射量，以及比较第一和第二喷射量的还原剂。
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8.发明申请METHOD AND APPARATUS FOR MONITORING A REDUCTANT INJECTION SYSTEM IN AN EXHAUST AFTERTREATMENT SYSTEM 有权用于在排气系统中监测减少注射系统的方法和装置公开(公告)号：US20120067031A1
公开(公告)日：2012-03-22
申请号：US12885821
申请日：2010-09-20
CPC分类号： F01N11/00 , F01N3/208 , F01N2550/05 , F01N2900/0418 , F01N2900/1808 , F01N2900/1812 , F01N2900/1821 , Y02T10/24 , Y02T10/47
摘要： A reductant injector is configured to dispense a reductant into an exhaust gas feedstream of an internal combustion engine upstream of a selective catalytic reduction device. The reductant injector of a reductant injection system is monitored by generating injector pulsewidth commands corresponding to a prescribed reductant flowrate, monitoring the injector pulsewidth commands, verifying the prescribed reductant flowrate corresponds to the injector pulsewidth commands, monitoring a fluidic pressure in the reductant injection system, estimating a first injected quantity of the reductant corresponding to the injector pulsewidth commands, estimating a second injected quantity of the reductant corresponding to the fluidic pressure in the reductant injection system, and comparing the first and second injected quantities of reductant.
摘要翻译： 还原剂喷射器构造成将还原剂分配到选择性催化还原装置上游的内燃机的废气进料流中。 通过产生对应于规定的还原剂流量的喷射脉冲宽度命令来监测还原剂喷射系统的还原剂喷射器，监测喷射器脉冲宽度命令，验证与喷射器脉冲宽度命令对应的规定的还原剂流量，监测还原剂喷射系统中的流体压力， 估计对应于喷射脉冲宽度指令的还原剂的第一喷射量，估计与还原剂喷射系统中的流体压力对应的还原剂的第二喷射量，以及比较第一和第二喷射量的还原剂。
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9.发明授权Method and apparatus for monitoring a reductant injection system in an exhaust aftertreatment system 有权用于在排气后处理系统中监测还原剂注射系统的方法和装置公开(公告)号：US08915062B2
公开(公告)日：2014-12-23
申请号：US12576399
申请日：2009-10-09
CPC分类号： F01N11/00 , F01N3/208 , F01N2550/05 , F01N2610/02 , F01N2610/144 , F01N2900/0418 , F01N2900/1806 , F01N2900/1808 , F01N2900/1812 , F01N2900/1822 , Y02T10/24 , Y02T10/47
摘要： An internal combustion engine operating at a lean air/fuel ratio includes a reductant injection system configured to dispense reductant into an exhaust gas feedstream upstream of a selective catalytic reduction device. The reductant injection system includes a reductant delivery system fluidly coupled to a reductant dispensing device that is configured to dispense the reductant. A method for monitoring the reductant injection system includes commanding the reductant dispensing device to dispense reductant at a prescribed reductant flowrate, controlling the reductant delivery system to a preferred operating state, monitoring operation of the reductant delivery system and estimating a reductant flowrate as a function of the monitored operation of the reductant delivery system, and diagnosing operation of the reductant injection system as a function of the prescribed reductant flowrate and the estimated reductant flowrate.
摘要翻译： 以稀薄空气/燃料比工作的内燃机包括还原剂喷射系统，其配置成将还原剂分配到选择性催化还原装置上游的废气进料流中。 还原剂注射系统包括流体耦合到还原剂分配装置的还原剂递送系统，其被配置为分配还原剂。 用于监测还原剂注射系统的方法包括命令还原剂分配装置以规定的还原剂流量分配还原剂，将还原剂递送系统控制到优选的操作状态，监测还原剂递送系统的操作并估计还原剂流量作为 还原剂输送系统的监测操作，以及根据规定的还原剂流速和估计的还原剂流速来诊断还原剂注入系统的操作。
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10.发明申请EXHAUST DIAGNOSTIC SYSTEM AND METHOD WITH SCR NH3 DEPLETION CLEANSING MODE FOR INITIAL STEP IN THE DEF QUALITY SERVICE HEALING TEST 有权排气诊断系统和方法与SCR NH3清洗方式初始步骤在质量保证服务健康测试公开(公告)号：US20130014575A1
公开(公告)日：2013-01-17
申请号：US13546338
申请日：2012-07-11
IPC分类号： G01M15/04
CPC分类号： F01N3/208 , F01N3/035 , F01N3/106 , F01N11/002 , F01N13/009 , F01N2550/02 , F01N2560/06 , F01N2560/14 , F01N2900/1602 , F02D41/0235 , F02D41/1446 , F02D41/1463 , F02D2200/0802 , Y02A50/2325 , Y02T10/24 , Y02T10/47
摘要： An exhaust diagnostic system comprises a selective catalyst reduction (SCR) component testing module, an exhaust stream temperature management module, and a test enabling module. The component testing module executes an SCR component efficiency test. The exhaust stream temperature management module adjusts a temperature of the SCR component to a predetermined temperature range. The test enabling module executes a process for depleting a reductant load and subsequently initiates an SCR component efficiency test while the temperature of the SCR catalyst is within the predetermined temperature range.A method for diagnosing an exhaust system comprises determining an efficiency of an SCR component and selectively adjusting a temperature of the SCR component to a predetermined temperature range. The method also includes executing a process for depleting a reductant load and initiating an SCR component efficiency test while the temperature of the SCR component is within the predetermined temperature range.
摘要翻译： 排气诊断系统包括选择性催化剂还原（SCR）部件测试模块，排气流温度管理模块和测试使能模块。 组件测试模块执行SCR组件效率测试。 排气流温度管理模块将SCR部件的温度调整到规定的温度范围。 测试使能模块执行耗尽还原剂负载的过程，随后在SCR催化剂的温度在预定温度范围内时启动SCR组分效率测试。 用于诊断排气系统的方法包括确定SCR组件的效率并选择性地将SCR组件的温度调节到预定温度范围。 该方法还包括在SCR组分的温度在预定温度范围内时，执行耗尽还原剂负载并开始SCR组分效率测试的过程。
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