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。