Patent ID: 7650780
Filing Date: 2010-01-26
Classification: F01N,G01N

Abstract:
1. A device for measuring mass concentration of particulate matter in an exhaust flow of an internal combustion engine, comprising: a sensor body, wherein the sensor body is configured to be coupled to an exhaust conduit of the internal combustion engine; a signal electrode and a detector electrode at least partially enclosed in the sensor body, wherein an end of the signal electrode and an end of the detector electrode are configured to be located in the exhaust conduit; and wherein a voltage is applied to the signal electrode during use and an electric charge accumulates on the detector electrode as particulate matter flows between the ends of the signal electrode and the detector electrode in the exhaust conduit during use, and wherein the electric charge that accumulates on the detector electrode varies with the mass concentration of particulate matter in the exhaust conduit.