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公开(公告)号：US6098012A
公开(公告)日：2000-08-01
申请号：US18424
申请日：1998-02-04
CPC分类号： F02D41/1405 , F02D37/02 , F02D41/2429 , G05B13/027
摘要： A system and method for use in a motor vehicles is disclosed for calculating a fuel multiplier during transient engine operation. The fuel multiplier modifies the amount of fuel released from a fuel actuator into an engine. The fuel control system uses neural network logic to establish the fuel multiplier. The neural network logic involves taking inputs from engine sensors, processing the inputs through an input layer, a hidden layer and an output layer resulting in a fuel multiplier.
摘要翻译： 公开了一种用于机动车辆的系统和方法，用于在瞬时发动机操作期间计算燃料倍增器。 燃料倍增器改变从燃料致动器释放到发动机中的燃料量。 燃料控制系统使用神经网络逻辑建立燃料倍增器。 神经网络逻辑涉及从发动机传感器获取输入，通过输入层，隐藏层和输出层处理输入，产生燃料倍增器。
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公开(公告)号：US6006153A
公开(公告)日：1999-12-21
申请号：US177319
申请日：1998-10-22
CPC分类号： F01N11/007 , F01N2550/02 , Y02T10/47
摘要： A catalyst monitoring system is provided for monitoring catalyst efficiency in a catalytic converter of a motor vehicle. The catalyst monitoring system includes a catalyst monitor receiving electrical signals indicative of oxygen in the exhaust gas from a first oxygen sensor positioned between the vehicle's engine and the catalytic converter and a second oxygen sensor positioned downstream from the catalytic converter. Each of these input signals are filtered in the catalyst monitor such that a particular range of frequencies that encapsulate information regarding catalyst efficiency are passed. The filtered signals are then used to establish an amplitude ratio between the downstream oxygen signal and the upstream oxygen signal, such that the algorithm output linearly correlates to catalyst efficiency of the catalytic converter. Digital signal filtering is preferably implemented using a finite impulse response bandpass filter, a full-wave rectifier, a low pass filter, a sampler and a signal normalizer. A means for detecting a stabilized output signal may optionally be used in conjunction with the catalyst monitor.
摘要翻译： 提供了用于监测机动车辆的催化转化器中的催化剂效率的催化剂监测系统。 催化剂监测系统包括催化剂监测器，其接收指示位于车辆发动机和催化转化器之间的第一氧传感器的排气中的氧的电信号，以及位于催化转化器下游的第二氧传感器。 这些输入信号中的每一个在催化剂监视器中被过滤，使得封装关于催化剂效率的信息的特定频率范围被通过。 然后将滤波的信号用于建立下游氧信号和上游氧信号之间的振幅比，使得算法输出与催化转化器的催化剂效率线性相关。 数字信号滤波优选地使用有限脉冲响应带通滤波器，全波整流器，低通滤波器，采样器和信号归一化器来实现。 用于检测稳定的输出信号的装置可以可选地与催化剂监测器结合使用。
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公开(公告)号：US5633456A
公开(公告)日：1997-05-27
申请号：US511125
申请日：1995-08-04
申请人： Douglas M. Stander
发明人： Douglas M. Stander
CPC分类号： G01M15/11
摘要： An apparatus and method are provided for detecting cylinder misfires in an internal combustion engine of a motor vehicle by digitally filtering out noise-related signals to improve the signal to noise ratio. Crankshaft rotation is sensed and crankshaft velocities are measured for each cylinder. Changes in angular velocity are determined and correspond to each of a plurality of cylinder firing events. A window of consecutive changes in angular velocity are used with a digital filter. The digital filter contains filter coefficients which are determined from a frequency analysis for a given engine by distinguishing between actual misfire events and noise related event frequencies. From the analysis a cut off frequency between actual misfires and noise is determined which is then used to determine the filter coefficients. The digital filter generates a filter output for the current cylinder firing event and the filter output is preferably multiplied by a gain to provide a compensated filter output. The compensated filter output is compared to a threshold value and a misfire event is determined for the selected cylinder based on the comparison. A high pass filter may be employed to filter out low frequency noise-related signals such as those associated with a power train bobble. Similarly, a low pass filter can be used to filter out high frequency noise signals such as those associated with crankshaft torsional vibrations. Both high and low pass filters could be employed in the alternative by using a high pass filter at low engine speeds and a low pass at high engine speeds.
摘要翻译： 提供了一种用于通过数字滤除噪声相关信号以提高信噪比来检测机动车辆的内燃机中的气缸失火的装置和方法。 检测曲轴旋转，并测量每个气缸的曲轴速度。 确定角速度的变化并对应于多个气缸点火事件中的每一个。 与数字滤波器一起使用角速度连续变化的窗口。 数字滤波器包含通过区分实际的失火事件和与噪声相关的事件频率从给定发动机的频率分析确定的滤波器系数。 从分析中确定实际失火和噪声之间的截止频率，然后将其用于确定滤波器系数。 数字滤波器产生用于当前气缸触发事件的滤波器输出，并且滤波器输出优选地乘以增益以提供经补偿的滤波器输出。 将补偿的过滤器输出与阈值进行比较，并且基于比较确定针对所选择的气缸的失火事件。 可以采用高通滤波器来滤除低频噪声相关信号，例如与功率系波动相关的信号。 类似地，可以使用低通滤波器来滤除与曲轴扭转振动相关的高频噪声信号。 通过在低发动机转速下使用高通滤波器和在高发动机转速下低通，可以采用高通滤波器和低通滤波器。
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公开(公告)号：US06922985B2
公开(公告)日：2005-08-02
申请号：US10348553
申请日：2003-01-21
申请人： Wei Wang , Jason E Wielenga , Bill Leisenring , Douglas M Stander , Dave Carlson , Mark J Poublon , Chris J Booms , Tom Stephens , Craig Summers , Danny K Schuelke , Richard K Moote
发明人： Wei Wang , Jason E Wielenga , Bill Leisenring , Douglas M Stander , Dave Carlson , Mark J Poublon , Chris J Booms , Tom Stephens , Craig Summers , Danny K Schuelke , Richard K Moote
CPC分类号： F01N11/007 , F01N2550/02 , F02D41/1441 , F02D41/1456 , F02D41/1479 , F02D41/1495 , F02D41/187 , F02D2200/0406 , Y02T10/47
摘要： In a motor vehicle having an engine with an exhaust catalyst and an oxygen sensor upstream of the catalyst and an oxygen sensor downstream of the catalyst, a method for detecting whether the catalyst has aged. Over a test block period of time, the method periodically obtains upstream data points from an oxygen sensor located upstream of the catalyst and from and oxygen sensor located downstream of the catalyst. Absolute differences are calculated between consecutive pairs of the upstream data points and the downstream data points. A ratio between the sums of absolute differences is then calculated, and the ratio is used to determine whether the catalyst has aged.
摘要翻译： 在具有在催化剂上游具有排气催化剂和氧传感器的发动机和在催化剂下游的氧传感器的机动车辆中，检测催化剂是否老化的方法。 在测试块时间段内，该方法周期性地从位于催化剂上游的氧传感器和位于催化剂下游的氧传感器获得上游数据点。 在上游数据点和下游数据点的连续对之间计算绝对差异。 然后计算出绝对差值之和的比值，并用该比率来确定催化剂是否老化。
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公开(公告)号：US06289275B1
公开(公告)日：2001-09-11
申请号：US09568630
申请日：2000-05-10
IPC分类号： F02D4126
CPC分类号： F02D41/1405 , F02D37/02 , F02D41/2429 , G05B13/027
摘要： A system and method for use in a motor vehicles is disclosed for calculating a fuel multiplier during transient engine operation. The fuel multiplier modifies the amount of fuel released from a fuel actuator into an engine. The fuel control system uses neural network logic to establish the fuel multiplier. The neural network logic involves taking inputs from engine sensors, processing the inputs through an input layer, a hidden layer and an output layer resulting in a fuel multiplier.
摘要翻译： 公开了一种用于机动车辆的系统和方法，用于在瞬时发动机操作期间计算燃料倍增器。 燃料倍增器改变从燃料致动器释放到发动机中的燃料量。 燃料控制系统使用神经网络逻辑建立燃料倍增器。 神经网络逻辑涉及从发动机传感器获取输入，通过输入层，隐藏层和输出层处理输入，产生燃料倍增器。
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公开(公告)号：US6035632A
公开(公告)日：2000-03-14
申请号：US135759
申请日：1998-08-18
CPC分类号： F01N11/007 , F01N2550/02 , Y02T10/47
摘要： A method is provided for monitoring catalyst efficiency in a catalytic converter of a motor vehicle, comprising the steps of: (a) detecting an oxygen level of an exhaust gas from the vehicle's engine by using an oxygen sensor positioned at the outlet of the catalytic converter; (b) terminating fuel flow to the vehicle's engine; (c) detecting a change in the oxygen level in response to terminating fuel flow; (d) determining a time period from termination of fuel flow to detection of the change in oxygen level; and then (e) compensating this time period with respect to an exhaust flowrate, such that the compensated time period is indicative of catalyst efficiency of the catalytic converter. More specifically, the exhaust flowrate is determined from a manifold absolute pressure and an engine rotational speed of the engine. To achieve reliable and consistent results, catalyst monitoring of the present invention is only enabled under preferred vehicle operating conditions. In addition, catalyst monitoring may also determine a second measurement of the catalyst by determining a similar time period for catalyst response once the fuel flow returns to the engine.
摘要翻译： 提供一种用于监测机动车辆的催化转化器中的催化剂效率的方法，包括以下步骤：（a）通过使用位于催化转化器出口处的氧传感器来检测来自车辆发动机的废气的氧含量 ; （b）终止燃油流向车辆发动机; （c）响应于终止燃料流量检测氧气水平的变化; （d）确定从燃料流终止到检测氧水平变化的时间段; 然后（e）相对于废气流量补偿该时间段，使得补偿的时间段指示催化转化器的催化剂效率。 更具体地，排气流量由发动机的歧管绝对压力和发动机转速确定。 为了实现可靠和一致的结果，本发明的催化剂监测仅在优选的车辆操作条件下才能实现。 此外，催化剂监测还可以通过在燃料流量返回发动机后确定催化剂响应的类似时间段来确定催化剂的第二次测量。
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公开(公告)号：US06860144B2
公开(公告)日：2005-03-01
申请号：US10368272
申请日：2003-02-18
申请人： Wei Wang , Douglas M Stander , David J Carlson , Chris J Booms , Thomas W Stephens , William E Leisenring , Richard K Moote , Danny K Schuelke , Mark J Poublon , Craig A Summers , Jason E Wielenga
发明人： Wei Wang , Douglas M Stander , David J Carlson , Chris J Booms , Thomas W Stephens , William E Leisenring , Richard K Moote , Danny K Schuelke , Mark J Poublon , Craig A Summers , Jason E Wielenga
CPC分类号： F02D41/1495
摘要： A non-intrusive method and arrangement for detecting the aging of an oxygen sensor, without increasing tailpipe emissions, is provided. The method detects an aging oxygen sensor, located between a motor vehicle engine and a catalytic converter, by sampling a series of oxygen level signals taken over a calibratable time block only when at least one engine operating condition satisfies a predetermined criterion whereunder the method will not intrude upon the engine controller's ability to minimize undesirable exhaust emissions. After a series of signal processing, the samplings are then compared to calibratable thresholds in order to determine the aging degree of the oxygen sensor.
摘要翻译： 提供了一种用于检测氧传感器老化的非侵入性方法和装置，而不增加尾气排放。 该方法仅在至少一个发动机工作条件满足预定标准的情况下通过在可校准时间段上取得的一系列氧气水平信号来检测位于机动车辆发动机和催化转化器之间的老化氧传感器，在该方法将不会 侵害了发动机控制器最大限度地减少不必要的废气排放的能力。 在一系列信号处理之后，将采样与可校准阈值进行比较，以确定氧传感器的老化程度。
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公开(公告)号：US5819197A
公开(公告)日：1998-10-06
申请号：US922273
申请日：1997-09-03
申请人： John Fiaschetti , Douglas M. Stander , Zhijian Wu
发明人： John Fiaschetti , Douglas M. Stander , Zhijian Wu
CPC分类号： G01M15/11
摘要： A method of misfire detection for an internal combustion engine in a motor vehicle includes the step of sampling a misfire indicator and filtering the misfire indicator to provide a filtered misfire indicator. The method also includes the step of selecting one misfire indicator point from the filtered misfire indicator. The method further includes the steps of comparing the one misfire indicator point to a misfire threshold to detect a misfire event and identifying a misfire if a misfire event is detected.
摘要翻译： 用于机动车辆内燃机的失火检测方法包括采样失火指示器和过滤失火指示器以提供过滤失火指示器的步骤。 该方法还包括从过滤失火指示器中选择一个失火指示点的步骤。 该方法还包括以下步骤：将一个失火指示点与失火阈值进行比较以检测失火事件，并且如果检测到失火事件则识别失火。
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