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公开(公告)号：US10480368B2
公开(公告)日：2019-11-19
申请号：US15688627
申请日：2017-08-28
发明人： Mario Anthony Santillo , Michael James Uhrich , Joseph Norman Ulrey , Andrew Bagnasco , Michael Casedy
摘要： Methods and systems are provided for differentiating an exhaust air leak from a catalyst monitor sensor degraded with a slow-response. In one example, a pressure proximate an exhaust system particulate filter less than a threshold pressure may indicate an exhaust air leak and responsive to the indication of the exhaust air leak, the thresholds for monitoring the catalyst monitor sensor response may be adjusted. In this way, the impact of an exhaust air leak on catalyst monitor output may be accounted for so that subsequent monitoring for threshold catalyst may continue to be performed accurately in the presence of an exhaust air leak.
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公开(公告)号：US09447744B2
公开(公告)日：2016-09-20
申请号：US14334298
申请日：2014-07-17
发明人： Hassene Jammoussi , Imad Hassan Makki , Michael James Uhrich , Michael Casedy , Kenneth John Behr
CPC分类号： F02D41/1454 , F02D41/123 , F02D41/126 , F02D41/1402 , F02D41/1439 , F02D41/1456 , F02D41/1495 , F02D41/222 , F02D41/2441 , F02D41/2454 , F02D2041/224 , Y02T10/40
摘要： Methods and systems are described for evaluating presence of fuel shifts in an engine. In one example, a method comprises indicating a fuel shift based on a time delay of an exhaust gas sensor during an entry into and an exit out of deceleration fuel shut off (DFSO).
摘要翻译： 描述了用于评估发动机中燃料换档的存在的方法和系统。 在一个示例中，一种方法包括基于在进入和离开减速燃料切断（DFSO）期间废气传感器的时间延迟来指示燃料换档。
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3.发明申请SYSTEMS AND METHODS FOR IMPROVING CATALYST DIAGNOSTICS IN THE PRESENCE OF SENSOR DEGRADATION 有权用于改善传感器降解过程中催化剂诊断的系统和方法公开(公告)号：US20150337750A1
公开(公告)日：2015-11-26
申请号：US14284839
申请日：2014-05-22
CPC分类号： F02D41/0235 , F01N3/101 , F01N3/20 , F01N9/00 , F01N11/00 , F01N2550/02 , F01N2560/025 , F02D41/0295 , F02D41/1439 , F02D41/1455 , F02D41/1475 , F02D41/22 , F02D2200/0814 , F02D2200/0816 , Y02A50/2324 , Y02T10/22 , Y02T10/47
摘要： Systems and methods for diagnosing operation of a catalyst are presented. In one example, threshold limits for catalyst variables are adjusted in response to attributes of a catalyst monitor sensor that may vary with sensor age. The catalyst variables may provide insight into whether or not the catalyst is degraded or operating as intended.
摘要翻译： 介绍了催化剂运行诊断系统和方法。 在一个示例中，响应于可能随传感器寿命而变化的催化剂监测传感器的属性来调整催化剂变量的阈限。 催化剂变量可以提供对催化剂是否劣化或按预期运行的了解。
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4.发明申请公开(公告)号：US20140345584A1
公开(公告)日：2014-11-27
申请号：US13901441
申请日：2013-05-23
IPC分类号： F02D41/30
CPC分类号： F02D41/30 , F02D41/1482 , F02D41/1483 , F02D41/1495 , F02D2041/1422 , F02D2041/1431 , F02D2041/1432 , F02D2041/228
摘要： Methods and systems are provided for converting an asymmetric degradation response of an exhaust gas sensor to a more symmetric degradation response. In one example, a method includes adjusting fuel injection responsive to a modified exhaust oxygen feedback signal from an exhaust gas sensor, the modified exhaust oxygen feedback signal modified by transforming an asymmetric response of the exhaust gas sensor to a more symmetric response. Further, the method may include adjusting one or more parameters of an anticipatory controller of the exhaust gas sensor based on the modified symmetric response.
摘要翻译： 提供了用于将废气传感器的不对称降解响应转换为更对称的退化响应的方法和系统。 在一个示例中，一种方法包括响应于来自排气传感器的改进的排气氧反馈信号来调节燃料喷射，所述改进的排气氧反馈信号通过将排气传感器的不对称响应变换为更对称的响应而被修改。 此外，该方法可以包括基于修改的对称响应调整排气传感器的预期控制器的一个或多个参数。
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公开(公告)号：US20140283589A1
公开(公告)日：2014-09-25
申请号：US13849411
申请日：2013-03-22
发明人： Imad Hassan Makki , Pankaj Kumar , Dimitar Petrov Filev , Timothy Robert Gernant , Michael Casedy , Brent Edward Sealy
IPC分类号： F01N11/00
CPC分类号： F01N11/00 , F01N11/007 , F01N2560/20 , Y02T10/47
摘要： A method of monitoring catalyst performance may comprise applying a set of parameter readings for a given sample to a support vector machine to generate a classification output, clustering the set of parameter readings to reduce a number of support vectors, computing a total fuel mass following a deceleration fuel shut-off event and an exhaust gas oxygen sensor switch and indicating catalyst degradation based on the total fuel mass.
摘要翻译： 一种监测催化剂性能的方法可以包括将一组给定样品的参数读数应用于支持向量机以产生分类输出，聚集该组参数读数以减少多个支持向量，计算一个 减速燃料切断事件和废气氧传感器开关，并根据总燃料质量显示催化剂劣化。
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公开(公告)号：US20160102594A1
公开(公告)日：2016-04-14
申请号：US14512967
申请日：2014-10-13
IPC分类号： F01N11/00
CPC分类号： F01N11/007 , F01N2550/02 , F01N2560/025 , F01N2560/14 , F01N2900/0601 , F02D41/0295 , F02D41/123 , F02D41/1441 , F02D41/1454 , Y02T10/47
摘要： A method is provided for monitoring an emission control device coupled to an engine. In one example approach, the method comprises, following a deceleration fuel shut-off (DFSO) duration, indicating degradation of an emission device based on an amount of rich products required to cause a sensor to become richer than a first threshold, the indicating carried out when DFSO duration is greater than a second threshold. The method also comprises an integration which is based on inlet air-fuel ratio, the integration starting only after a pre-catalyst sensor reaches stoichiometry.
摘要翻译： 提供了一种用于监测耦合到发动机的排放控制装置的方法。 在一个示例性方法中，该方法包括：在减速燃料切断（DFSO）持续时间之后，基于使传感器变得比第一阈值更富的所需的富产物量，指示排放装置的劣化， 当DFSO持续时间大于第二阈值时出现。 该方法还包括基于入口空燃比的积分，仅在预催化剂传感器达到化学计量之后起始积分。
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7.发明授权公开(公告)号：US09249751B2
公开(公告)日：2016-02-02
申请号：US13901441
申请日：2013-05-23
CPC分类号： F02D41/30 , F02D41/1482 , F02D41/1483 , F02D41/1495 , F02D2041/1422 , F02D2041/1431 , F02D2041/1432 , F02D2041/228
摘要： Methods and systems are provided for converting an asymmetric degradation response of an exhaust gas sensor to a more symmetric degradation response. In one example, a method includes adjusting fuel injection responsive to a modified exhaust oxygen feedback signal from an exhaust gas sensor, the modified exhaust oxygen feedback signal modified by transforming an asymmetric response of the exhaust gas sensor to a more symmetric response. Further, the method may include adjusting one or more parameters of an anticipatory controller of the exhaust gas sensor based on the modified symmetric response.
摘要翻译： 提供了用于将废气传感器的不对称降解响应转换为更对称的退化响应的方法和系统。 在一个示例中，一种方法包括响应于来自排气传感器的改进的排气氧反馈信号来调节燃料喷射，所述改进的排气氧反馈信号通过将排气传感器的不对称响应变换为更对称的响应而被修改。 此外，该方法可以包括基于修改的对称响应调整排气传感器的预期控制器的一个或多个参数。
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公开(公告)号：US20160017827A1
公开(公告)日：2016-01-21
申请号：US14334298
申请日：2014-07-17
发明人： Hassene Jammoussi , Imad Hassan Makki , Michael James Uhrich , Michael Casedy , Kenneth John Behr
CPC分类号： F02D41/1454 , F02D41/123 , F02D41/126 , F02D41/1402 , F02D41/1439 , F02D41/1456 , F02D41/1495 , F02D41/222 , F02D41/2441 , F02D41/2454 , F02D2041/224 , Y02T10/40
摘要： Methods and systems are described for evaluating presence of fuel shifts in an engine. In one example, a method comprises indicating a fuel shift based on a time delay of an exhaust gas sensor during an entry into and an exit out of deceleration fuel shut off (DFSO).
摘要翻译： 描述了用于评估发动机中燃料换档的存在的方法和系统。 在一个示例中，一种方法包括基于在进入和离开减速燃料切断（DFSO）期间废气传感器的时间延迟来指示燃料换档。
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公开(公告)号：US20150219033A1
公开(公告)日：2015-08-06
申请号：US14174806
申请日：2014-02-06
CPC分类号： F02D41/1495 , F02D41/08 , F02D41/1454 , F02D41/222 , F02D2041/228 , F02D2041/286 , G01M15/104 , Y02T10/40
摘要： A method for monitoring an exhaust gas sensor coupled in an engine exhaust is provided. In one embodiment, the method comprises indicating exhaust gas sensor degradation based on shape of a distribution of extreme values of a plurality of sets of lambda differentials collected during selected operating conditions. In this way, the exhaust gas sensor may be monitored in a non-intrusive manner.
摘要翻译： 提供一种用于监测联接在发动机排气中的废气传感器的方法。 在一个实施例中，该方法包括基于在选择的操作条件期间收集的多组λ差异的极值的分布的形状来指示排气传感器劣化。 以这种方式，废气传感器可以以非侵入的方式被监视。
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公开(公告)号：US11555465B1
公开(公告)日：2023-01-17
申请号：US17447382
申请日：2021-09-10
发明人： Andrew Couzens , Jonathan Saville , Robert Jentz , Matthew Russell Carpenter , Michael Casedy , Adam Krach
摘要： A method and a system for diagnosing positive crankcase ventilation (PCV) systems are disclosed. In one example, the method diagnoses a PCV system based on a pressure that may be observed during engine cranking. In another example, the PCV system is diagnosed during vehicle driving conditions after the engine exits cranking.
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