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公开(公告)号：US5956945A
公开(公告)日：1999-09-28
申请号：US970946
申请日：1997-11-14
CPC分类号： F01N11/007 , F01N2550/02 , F01N2550/20 , Y02T10/22 , Y02T10/47
摘要： A method and apparatus converts time-resolved sensor signals into transfer functions and/or cumulative transfer function signals which can be attained by computation means such as by using Fast Fourier Transforms. A signal, as a means to assess catalyst performance such as a signal based on sensing oxygen concentration or air to fuel ratio or hydrocarbon concentration in motor vehicle exhaust in accordance with the present invention is in the time domain and has multiple components at different frequencies. The use of Fast Fourier Transforms isolates the various spectral densities which arise from different frequency components of the complex time domain signal. Cross spectral density function and power spectral density function are used to determine the transfer function. The analysis has been found to be substantially independent of operating conditions. The transfer function and cumulative transfer function have been found to be a precise indication of the catalyst performance. The catalyst performance can be signaled to the vehicle operator for on board diagnostics (OBD) of the catalyst.
摘要翻译： 一种方法和装置将时间分辨的传感器信号转换成可以通过诸如通过使用快速傅里叶变换的计算装置来实现的传递函数和/或累积传递函数信号。 作为根据本发明的用于评估催化剂性能的手段，例如基于感测氧浓度或空气燃料比或机动车辆排气中的烃浓度的信号，在时域中具有不同频率的多个分量。 快速傅里叶变换的使用隔离了由复杂时域信号的不同频率分量产生的各种频谱密度。 交叉频谱密度函数和功率谱密度函数用于确定传递函数。 已经发现分析基本上与操作条件无关。 已经发现传递函数和累积传递函数是催化剂性能的精确指示。 可以向车辆操作员发出催化剂性能，用于催化剂的车载诊断（OBD）。
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2.发明授权Method for monitoring the performance of a catalytic converter using a rate modifier 有权使用速率调节剂监测催化转化器的性能的方法
公开(公告)号：US6116021A
公开(公告)日：2000-09-12
申请号：US158460
申请日：1998-09-22
申请人： Darren Schumacher , Michael A. Badalament , Jeffrey D. Naber , Alan Chewter , Kevin J. Bush , Bruce Church , David Frankowski , David Price
发明人： Darren Schumacher , Michael A. Badalament , Jeffrey D. Naber , Alan Chewter , Kevin J. Bush , Bruce Church , David Frankowski , David Price
CPC分类号： F01N11/00 , F01N11/007 , F01N2550/02 , F01N2900/0422 , Y02T10/47
摘要： A method for monitoring the performance of a catalytic converter (34) computes the oxygen storage capacity and desorption capacity of a catalyst within the catalytic converter (34). An engine control unit (10) receives mass flow rate information of air from a mass air flow rate sensor (12) and an injector driver (24), and receives electrical signals from an upstream exhaust gas sensor (28) and a downstream exhaust gas sensor (30). A rate modifier is determined from excess air ratios and an adaptation parameter. The engine control unit (10) calculates normalized air fuel ratios for the exhaust gas entering and leaving the catalytic converter (34) and performs numerical integration using the rate modifier to determine the oxygen storage capacity of the catalyst in the catalytic converter (34). The calculated oxygen storage capacity of the catalyst can be compared with threshold values to determine the performance of the catalytic converter (34).
摘要翻译： 用于监测催化转化器（34）的性能的方法计算催化转化器（34）内的催化剂的储氧能力和解吸能力。 发动机控制单元（10）从质量空气流量传感器（12）和喷射器驱动器（24）接收空气的质量流量信息，并且从上游废气传感器（28）和下游排气 传感器（30）。 速率调节剂由过量空气比和适应参数确定。 发动机控制单元（10）计算进入和离开催化转化器（34）的废气的归一化空燃比，并使用速率调节器进行数值积分，以确定催化转化器（34）中催化剂的储氧能力。 将催化剂的计算氧气存储容量与阈值进行比较，以确定催化转化器（34）的性能。
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公开(公告)号：US20080250850A1
公开(公告)日：2008-10-16
申请号：US11691762
申请日：2007-03-27
申请人： Marvin Lynch , Ningsheng Qiao , Jack Szpytman , Louis Liu , Richard Gilbert , Alan Chewter
发明人： Marvin Lynch , Ningsheng Qiao , Jack Szpytman , Louis Liu , Richard Gilbert , Alan Chewter
CPC分类号： G01M15/11
摘要： A method for determining a misfire condition includes receiving crankshaft acceleration data. The method further includes routing the received data through at least one of a plurality of processing paths and through a startup path and determining a crankshaft revolution count. The method further includes comparing the determined crankshaft accelerations over the determined revolution count to at least one threshold crankshaft acceleration value over the determined revolution count and determining a misfire condition from one of the startup path and the processing path based on the comparison.
摘要翻译： 用于确定失火状态的方法包括接收曲轴加速度数据。 该方法还包括通过多个处理路径中的至少一个并通过启动路径路由所接收的数据，并确定曲轴转数。 该方法还包括将确定的转速计算的确定的曲轴加速度与所确定的转数进行比较，至少一个阈值曲轴加速度值，以及基于该比较从启动路径和处理路径之一确定失火状态。
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公开(公告)号：US20070005223A1
公开(公告)日：2007-01-04
申请号：US11170891
申请日：2005-06-30
申请人： Gregory Feucht , Alan Chewter , Marvin Lynch , Matthew Henry , Christopher DeSalvo , Robert Deutsch
发明人： Gregory Feucht , Alan Chewter , Marvin Lynch , Matthew Henry , Christopher DeSalvo , Robert Deutsch
IPC分类号： G01M15/04
CPC分类号： G01M15/06 , F02D41/009
摘要： A method and system for identifying a phase in an internal combustion engine (102) is disclosed. The internal combustion engine may include an even number of cylinders and is fitted with at least one sensor. In one embodiment, the method includes measuring a state of the internal combustion engine using the at least one sensor. The method may further include calculating a deviation of the state from an expected set of values, and determining the phase of the internal combustion engine, based on the deviation.
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公开(公告)号：US07712357B2
公开(公告)日：2010-05-11
申请号：US11696584
申请日：2007-04-04
申请人： Ningsheng Qiao , Jeff Naber , Marvin Lynch , Karen Skalny , Alan Chewter
发明人： Ningsheng Qiao , Jeff Naber , Marvin Lynch , Karen Skalny , Alan Chewter
IPC分类号： G01M15/11
CPC分类号： G01M15/042 , G01M15/11 , G06Q40/08
摘要： A method of operating an engine includes determining at least one characteristic of rough road performance based on at least one driveline characteristic and receiving crankshaft acceleration data. The method further includes comparing the received crankshaft acceleration data and determined characteristic, inhibiting the misfire counter based on the comparison, and operating the engine based on the disabled misfire detection.
摘要翻译： 一种操作发动机的方法包括基于至少一个传动系特性和接收曲轴加速度数据来确定至少一个粗糙道路性能的特征。 该方法还包括比较接收的曲轴加速度数据和确定的特性，基于比较来禁止失火计数器，以及基于禁用的失火检测来操作发动机。
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公开(公告)号：US07591172B2
公开(公告)日：2009-09-22
申请号：US11691762
申请日：2007-03-27
申请人： Marvin Lynch , Ningsheng Qiao , Jack Szpytman , Louis Liu , Richard Gilbert , Alan Chewter
发明人： Marvin Lynch , Ningsheng Qiao , Jack Szpytman , Louis Liu , Richard Gilbert , Alan Chewter
IPC分类号： G01M15/11
CPC分类号： G01M15/11
摘要： A method for determining a misfire condition includes receiving crankshaft acceleration data. The method further includes routing the received data through at least one of a plurality of processing paths and through a startup path and determining a crankshaft revolution count. The method further includes comparing the determined crankshaft accelerations over the determined revolution count to at least one threshold crankshaft acceleration value over the determined revolution count and determining a misfire condition from one of the startup path and the processing path based on the comparison.
摘要翻译： 用于确定失火状态的方法包括接收曲轴加速度数据。 该方法还包括通过多个处理路径中的至少一个并通过启动路径路由所接收的数据，并确定曲轴转数。 该方法还包括将确定的转速计算的确定的曲轴加速度与所确定的转数进行比较，至少一个阈值曲轴加速度值，以及基于该比较从启动路径和处理路径之一确定失火状态。
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公开(公告)号：US20080249811A1
公开(公告)日：2008-10-09
申请号：US11696584
申请日：2007-04-04
申请人： Ningsheng Qiao , Jeff Naber , Marvin Lynch , Karen Skalny , Alan Chewter
发明人： Ningsheng Qiao , Jeff Naber , Marvin Lynch , Karen Skalny , Alan Chewter
CPC分类号： G01M15/042 , G01M15/11 , G06Q40/08
摘要： A method of operating an engine includes determining at least one characteristic of rough road performance based on at least one driveline characteristic and receiving crankshaft acceleration data. The method further includes comparing the received crankshaft acceleration data and determined characteristic, inhibiting the misfire counter based on the comparison, and operating the engine based on the disabled misfire detection.
摘要翻译： 一种操作发动机的方法包括基于至少一个传动系特性和接收曲轴加速度数据来确定至少一个粗糙道路性能的特征。 该方法还包括比较接收的曲轴加速度数据和确定的特性，基于比较来禁止失火计数器，以及基于禁用的失火检测来操作发动机。
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8.发明授权
公开(公告)号：US5906652A
公开(公告)日：1999-05-25
申请号：US126871
申请日：1998-07-31
申请人： Donald Remboski , Darren Schumacher , Marvin Lynch , Alan Chewter
发明人： Donald Remboski , Darren Schumacher , Marvin Lynch , Alan Chewter
CPC分类号： G01M15/11
摘要： A method and system of misfire determination includes establishing an acceleration misfire threshold and an acceleration sub-misfire threshold. Then incremental engine position is sensed and a series of acceleration data-points are derived (401). If a data-point of the series of acceleration data-points falls between the sub-misfire threshold and the misfire threshold, then a training process is aborted for a blanking period based on a delay time whose length is preferably based on engine operating conditions (415). If a data-point of the series of acceleration data-points does not fall below the sub-misfire threshold, then the series of acceleration data-points, are averaged and a synchronously corrected acceleration data-point is derived (417). Then, a misfire condition is indicated when the synchronously corrected acceleration data-point exceeds the established acceleration misfire threshold (421).
摘要翻译： 失火判定的方法和系统包括建立加速失火阈值和加速度失火阈值。 然后检测出增量发动机位置，得到一系列加速度数据点（401）。 如果一系列加速度数据点的数据点落在子失火阈值和失火阈值之间，则基于其长度优选地基于发动机操作条件的延迟时间而在消隐周期中中止训练过程（ 415）。 如果一系列加速度数据点的数据点不低于次失火阈值，则对一系列加速度数据点进行平均，并导出同步校正的加速度数据点（417）。 然后，当同步校正的加速度数据点超过建立的加速失火阈值时，指示失火条件（421）。
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