Mass Based Methods And Systems For Estimating Soot Load
    1.
    发明申请
    Mass Based Methods And Systems For Estimating Soot Load 有权
    基于质量的方法和系统估计烟灰负荷

    公开(公告)号:US20110120088A1

    公开(公告)日:2011-05-26

    申请号:US12625049

    申请日:2009-11-24

    IPC分类号: F01N11/00 F01N3/00 G06F19/00

    摘要: Mass based methods and systems for estimating soot load in a filter of an after-treatment system for exhaust stream are provided. The after-treatment system can comprise a sensor, a filter, and a processor configured to estimate soot load in the filter based on a mass based multi-layer model. An example system includes a virtual sensor comprising an estimator for providing information corresponding to a filter outlet NO2 concentration. An example method includes the steps of providing the mass based multi-layer model, passing the exhaust stream through the filter, and using the sensor to monitor a condition of the exhaust stream. The example method further includes the steps of calculating a total regeneration rate based on the multi-layer model by solving a second-order ordinary differential equation with a plurality of parameters using an analytical approach, and estimating the soot load based on the calculated total regeneration rate.

    摘要翻译: 提供了用于估计用于排气流的后处理系统的过滤器中的烟灰负荷的基于质量的方法和系统。 后处理系统可以包括传感器,过滤器和被配置为基于基于质量的多层模型来估计过滤器中的烟灰负荷的处理器。 示例系统包括虚拟传感器,其包括用于提供与过滤器出口NO 2浓度相对应的信息的估计器。 一个示例性方法包括以下步骤:提供基于质量的多层模型,使废气流通过过滤器,并使用传感器来监测废气流的状况。 该示例方法还包括以下步骤:基于多层模型,通过使用分析方法求解具有多个参数的二阶常微分方程,并基于所计算的总再生来估计烟灰负荷,计算总再生率 率。

    Mass based methods and systems for estimating soot load
    2.
    发明授权
    Mass based methods and systems for estimating soot load 有权
    用于估算烟灰负荷的基于质量的方法和系统

    公开(公告)号:US08332124B2

    公开(公告)日:2012-12-11

    申请号:US12625049

    申请日:2009-11-24

    IPC分类号: G06F19/00 G06F19/26

    摘要: Mass based methods and systems for estimating soot load in a filter of an after-treatment system for exhaust stream are provided. The after-treatment system can comprise a sensor, a filter, and a processor configured to estimate soot load in the filter based on a mass based multi-layer model. An example system includes a virtual sensor comprising an estimator for providing information corresponding to a filter outlet NO2 concentration. An example method includes the steps of providing the mass based multi-layer model, passing the exhaust stream through the filter, and using the sensor to monitor a condition of the exhaust stream. The example method further includes the steps of calculating a total regeneration rate based on the multi-layer model by solving a second-order ordinary differential equation with a plurality of parameters using an analytical approach, and estimating the soot load based on the calculated total regeneration rate.

    摘要翻译: 提供了用于估计用于排气流的后处理系统的过滤器中的烟灰负荷的基于质量的方法和系统。 后处理系统可以包括传感器,过滤器和被配置为基于基于质量的多层模型来估计过滤器中的烟灰负荷的处理器。 示例系统包括虚拟传感器,其包括用于提供与过滤器出口NO 2浓度相对应的信息的估计器。 一个示例性方法包括以下步骤:提供基于质量的多层模型,使废气流通过过滤器,并使用传感器来监测废气流的状况。 该示例方法还包括以下步骤:基于多层模型,通过使用分析方法求解具有多个参数的二阶常微分方程,并基于所计算的总再生来估计烟灰负荷,计算总再生率 率。

    Methods For Controlling The Operation Of A Particulate Filter
    3.
    发明申请
    Methods For Controlling The Operation Of A Particulate Filter 有权
    控制颗粒过滤器操作的方法

    公开(公告)号:US20120053814A1

    公开(公告)日:2012-03-01

    申请号:US12871474

    申请日:2010-08-30

    IPC分类号: F01N3/023 F02D28/00

    摘要: A method of controlling the operation of a particulate filter in an exhaust gas after-treatment system may comprise calculating a ratio of particulate loading rate to filter regeneration rate using a mass-based soot load estimation scheme and comparing the ratio of particulate loading rate to filter regeneration rate to a predetermined threshold value. The method may further comprise controlling operating conditions of the particulate filter to maintain the ratio of particulate loading rate to filter regeneration rate at a value above the predetermined threshold value.

    摘要翻译: 控制废气后处理系统中的颗粒过滤器的操作的方法可以包括使用基于质量的烟灰负荷估计方案来计算颗粒负载率与过滤器再生速率的比率,并将颗粒负载率与过滤器的比率 再生率达到预定阈值。 该方法可以进一步包括控制颗粒过滤器的操作条件以将颗粒负载率与过滤器再生速率的比保持在高于预定阈值的值。

    Methods for controlling the operation of a particulate filter
    4.
    发明授权
    Methods for controlling the operation of a particulate filter 有权
    控制微粒过滤器运行的方法

    公开(公告)号:US08612115B2

    公开(公告)日:2013-12-17

    申请号:US12871474

    申请日:2010-08-30

    IPC分类号: F01N3/023 F02D28/00

    摘要: A method of controlling the operation of a particulate filter in an exhaust gas after-treatment system may comprise calculating a ratio of particulate loading rate to filter regeneration rate using a mass-based soot load estimation scheme and comparing the ratio of particulate loading rate to filter regeneration rate to a predetermined threshold value. The method may further comprise controlling operating conditions of the particulate filter to maintain the ratio of particulate loading rate to filter regeneration rate at a value above the predetermined threshold value.

    摘要翻译: 控制废气后处理系统中的颗粒过滤器的操作的方法可以包括使用基于质量的烟灰负荷估计方案来计算颗粒负载率与过滤器再生速率的比率,并将颗粒负载率与过滤器的比率 再生率达到预定阈值。 该方法可以进一步包括控制颗粒过滤器的操作条件以将颗粒负载率与过滤器再生速率的比保持在高于预定阈值的值。

    Adaptive video switching for variable network conditions
    5.
    发明授权
    Adaptive video switching for variable network conditions 有权
    用于可变网络条件的自适应视频切换

    公开(公告)号:US08352996B2

    公开(公告)日:2013-01-08

    申请号:US12147512

    申请日:2008-06-27

    摘要: A method for video playback switching in response to changing network conditions. The method includes accessing a server to retrieve respective index files for a low bit rate version and a high bit rate version of the video file, and instantiating a low bit rate media player and a high bit rate media. Playback of the video file is begun by the high bit rate media player streaming the high bit rate version from the server. Upon an indication of impeded network conditions, a transition point is selected, wherein the transition point indicates where downloading of the high bit rate version stops and where downloading of the low bit rate version begins. The low bit rate media player is then positioned to begin playback at the transition point. Playback of the video file is then switched to the low bit rate player upon encountering the transition point.

    摘要翻译: 一种响应于网络条件变化的视频回放切换方法。 该方法包括访问服务器以检索用于低比特率版本和视频文件的高比特率版本的相应索引文件,以及实例化低比特率媒体播放器和高比特率媒体。 视频文件的播放由高比特率媒体播放器从服务器流式传输高比特率版本开始。 在有障碍的网络条件的指示时,选择转换点,其中转换点指示高比特率版本的下载停止并且开始低比特率版本的下载。 然后将低比特率媒体播放器定位成在转换点开始播放。 然后,当遇到转换点时,将视频文件的播放切换到低比特率播放器。