公开(公告)号：US20160097752A1

公开(公告)日：2016-04-07

申请号：US14504478

申请日：2014-10-02

Applicant: DELPHI TECHNOLOGIES, INC.

Inventor： KONRAD A. WEBER ,  DAVID A. GOULETTE

IPC: G01N33/00 ,  G01N27/04 ,  G01K13/00 ,  G01M15/10

CPC classification number: G01N33/0006 ,  F02D41/1466 ,  F02D41/222 ,  G01K7/16 ,  G01K13/00 ,  G01M15/102 ,  G01N15/0656 ,  G01N33/0073 ,  G01N2015/0046 ,  Y02T10/40

Abstract: A method is presented for diagnosing a particulate matter sensing system, where the system includes a sensing element having two electrodes spaced from one another. The method determining at a first time during a cool-down event a first sensing element temperature and a resistance of the sensing element, and determining at a later second time during the cool-down event a second sensing element temperature and the resistance of the sensing element. The method further includes calculating a predicted sensing element resistance at the second sensing element temperature, based on the first sensing element temperature, the resistance of the sensing element determined at the first time, and a predetermined model of the resistance vs. temperature characteristics of the sensing element. A fault condition for the system may be indicated based on a comparison of the predicted sensing element resistance at the second sensing element temperature and a measured sensing element resistance.

Abstract translation: 提出了用于诊断颗粒物质感测系统的方法，其中系统包括具有彼此间隔开的两个电极的感测元件。 所述方法在冷却事件期间在第一时间确定第一感测元件温度和感测元件的电阻，并且在冷却事件期间的稍后的第二时间确定第二感测元件温度和感测电阻 元件。 该方法还包括基于第一感测元件温度，在第一时间确定的感测元件的电阻和第一感测元件温度的电阻对温度特性的预定模型来计算第二感测元件温度处的预测感测元件电阻 传感元件。 可以基于第二感测元件温度处的预测感测元件电阻和测量的感测元件电阻的比较来指示系统的故障状况。