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。

公开(公告)号：US20150211429A1

公开(公告)日：2015-07-30

申请号：US14165843

申请日：2014-01-28

Applicant: DELPHI TECHNOLOGIES, INC.

Inventor： LARY R. HOCKEN ,  ROBERT J.A. VAN DER POEL

IPC: F02D41/22 ,  G01M15/10 ,  G01N27/02 ,  G01R35/00 ,  G01N15/04 ,  G01N15/06

CPC classification number: F02D41/222 ,  F02D41/029 ,  F02D41/1466 ,  F02D41/1494 ,  F02D2200/0812 ,  G01M15/102 ,  G01N15/0606 ,  G01N15/0656 ,  G01N2015/0046 ,  G01R35/005

Abstract: A method for verifying the validity of an output of a particulate matter sensor mounted in an engine exhaust system downstream of a diesel particulate filter, the particulate matter sensor including a pair of electrodes spaced apart from each other, includes initiating regeneration of the diesel particulate filter, applying and maintaining a higher than nominal voltage across the electrodes following the step of initiating regeneration of the diesel particulate filter, and measuring an electrical parameter across the electrodes while the higher voltage is applied across the electrodes, where the electrical parameter is indicative of an amount of soot accumulated on the sensor. The reading of accumulated soot is evaluated to determine whether the sensor is indicating that the amount of accumulated soot is within an expected range based on a clean diesel particulate filter and the elevated applied voltage.

Abstract translation: 一种用于验证安装在柴油机微粒过滤器下游的发动机排气系统中的颗粒物质传感器的输出的有效性的方法，所述颗粒物质传感器包括彼此间隔开的一对电极，包括启动柴油颗粒过滤器的再生 在启动柴油机微粒过滤器的再生的步骤之后，在电极之间施加和维持高于标称电压，以及跨越电极测量跨越电极的电参数，同时电参数指示电极 积累在传感器上的烟尘量。 评估积累的烟灰的读数以确定传感器是否表明基于清洁的柴油微粒过滤器和升高的施加电压，累积烟灰的量在预期范围内。