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公开(公告)号：US07021128B2
公开(公告)日：2006-04-04
申请号：US10425181
申请日：2003-04-29
CPC分类号： G01L23/225 , G01M15/11
摘要： A misfire detection system is provided including an internal combustion engine having a combustion chamber and an exhaust system in fluid communication with the combustion chamber. An acoustic sensor is associated with either the combustion chamber or the exhaust system for sensing noise. The controller receives a signal from the acoustic sensor for determining whether the noise is indicative of misfire. One or more acoustic sensors may be fluidly and/or mechanically coupled to the engine or other portion of the powertrain system. The acoustic sensor generates a signal having a frequency that may be compared to engine temperatures, speeds, and loads to determine whether a misfire event has occurred in one of the cylinders. The signature of the frequency may be determined and compared with a known set of frequencies for desired engine operation to determine whether a misfire has occurred.
摘要翻译： 提供了一种失火检测系统，包括具有与燃烧室流体连通的燃烧室和排气系统的内燃机。 声学传感器与用于感测噪声的燃烧室或排气系统相关联。 控制器从声传感器接收信号，以确定噪声是否表示失火。 一个或多个声学传感器可以流体地和/或机械耦合到发动机或动力系统的其它部分。 声学传感器产生具有可以与发动机温度，速度和负载进行比较的频率的信号，以确定其中一个气缸中是否发生失火事件。 可以确定频率的签名并将其与用于期望的发动机操作的已知的一组频率进行比较，以确定是否发生失火。
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公开(公告)号：US06964694B2
公开(公告)日：2005-11-15
申请号：US10425561
申请日：2003-04-29
IPC分类号： B01D46/00 , B01D46/44 , B01D46/46 , F01N9/00 , F01N11/00 , G01N29/14 , G01N29/32 , G01N29/42 , B01D46/42
CPC分类号： B01D46/0086 , B01D46/446 , B01D46/448 , B01D2273/24 , B01D2279/30 , F01N9/002 , F01N9/005 , F01N11/00 , F01N11/002 , F01N2330/06 , F01N2550/04 , F01N2550/05 , F01N2550/12 , F02D2200/025 , F02D2200/0812 , G01N29/14 , G01N29/326 , G01N29/42 , G01N2291/0217 , Y02T10/47 , Y10S55/30
摘要： A particulate filter system is provided including an exhaust system transporting emissions from an engine. A filter such as a diesel particulate filter is disposed in the exhaust system. An acoustic sensor is associated with the exhaust system for detecting one or more frequencies passing through the filter. The frequency corresponds to a filter state indicative of a clean, full, loading, or failed filter. One or more acoustic sensors may fluidly or mechanically coupled to portions of the exhaust system to determine the frequency caused by the exhaust flow through the filter. The acoustic emissions from the filter may be used to compare to a known filter state to determine the present filter state. Alternatively, more sophisticated mathematical approaches may be used in which processed filter information is compared to a known filter state to determine the present filter state.
摘要翻译： 提供了一种颗粒过滤器系统，其包括运送发动机排放物的排气系统。 在排气系统中设置有柴油机微粒过滤器等过滤器。 声学传感器与用于检测通过过滤器的一个或多个频率的排气系统相关联。 频率对应于表示清洁，满载，加载或故障的过滤器的过滤器状态。 一个或多个声学传感器可以流体地或机械地联接到排气系统的部分，以确定由通过过滤器的排气流引起的频率。 来自滤波器的声发射可以用于与已知的滤波器状态进行比较以确定当前的滤波器状态。 或者，可以使用更复杂的数学方法，其中将处理的过滤器信息与已知过滤器状态进行比较以确定当前的过滤器状态。
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