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。

公开(公告)号：US20150153249A1

公开(公告)日：2015-06-04

申请号：US14096373

申请日：2013-12-04

Applicant: DELPHI TECHNOLOGIES, INC.

Inventor： DAVID A. GOULETTE ,  LARY R. HOCKEN

IPC: G01M15/10

CPC classification number: G01M15/102 ,  F02D41/1466 ,  G01N15/0606 ,  G01N15/0656 ,  G01N2015/0046

Abstract: A particulate sensing system configured to detect particulates in exhaust gas from a combustion process. Particulates are detected based on electrical conductivity between a first electrode and a second electrode. A heater element is provided to heat the first electrode and the second electrode. The first electrode, the second electrode, and the heater element cooperate to form a sensor. The heater element is operated to establish a sensor temperature greater than a dew-point temperature of the exhaust gas and less than a burn-off temperature of the sensor to reduce thermophoretic accumulation of particulates on the sensor. When the exhaust temperature and the sensor temperature are suitable for thermophoretic accumulation and electrophoretic accumulation of particulates, a voltage is applied across the electrodes to facilitate electrophoretic accumulation of particulates, and the heater element is turned off so thermophoretic accumulation occurs.

Abstract translation: 一种构造成从燃烧过程中检测废气中的微粒的微粒感测系统。 基于第一电极和第二电极之间的电导率来检测颗粒。 提供加热元件以加热第一电极和第二电极。 第一电极，第二电极和加热器元件协作以形成传感器。 操作加热器元件以建立大于排气的露点温度的传感器温度并且小于传感器的燃尽温度以减少微粒在传感器上的热泳积累。 当排气温度和传感器温度适用于微波的热泳积聚和电泳积聚时，在电极两端施加电压以促进微粒的电泳积聚，并且加热器元件被关闭，从而发生热血沉积。