发明名称 METHOD AND DEVICE FOR MEASURING THE CONCENTRATION OF SOOT PARTICLES IN AN EXHAUST GAS, IN PARTICULAR FROM AN INTERNAL COMBUSTION ENGINE
摘要 The present invention relates to a method and a sensor (1) for collecting soot in an exhaust stream from an internal combustion engine by means of a resistive type planar probe positioned in the gas stream and having at least one face provided with electrodes connected to an electronic device for measuring soot concentration in the gas stream. The gas stream upstream from the planar probe is deflected by means of a protection shield (3) completely covering the planar probe and having a single soot-collection window (5) arranged in a wall of the protection shield (3) that is situated downstream from the planar probe in the gas stream, in such a manner as to: protect the planar probe from a direct frontal impact of soot and any debris contained in the gas stream; andgenerate a turbulent flow and reduce the speed of the gas stream downstream from the planar probe so as to select soot particles as a function of their size.
申请公布号 US2014223887(A1) 申请公布日期 2014.08.14
申请号 US201214235773 申请日期 2012.07.18
申请人 Duault Frédéric;Raquin Stéphane 发明人 Duault Frédéric;Raquin Stéphane
分类号 F01N11/00 主分类号 F01N11/00
代理机构 代理人
主权项 1. A method of collecting soot in a gas stream, in particular an exhaust stream from an internal combustion engine, by means of a planar probe, preferably of resistive or capacitive type, positioned in the gas stream and having at least one face provided with electrodes connected to an electronic device for measuring soot concentration in the gas stream, the method being characterized in that the gas stream upstream from the planar probe is deflected by means of a protection shield completely covering the planar probe and having a single soot-collection window formed in a wall of the protection shield that is situated downstream from the planar probe in the gas stream, in such a manner as to: protect the planar probe from a direct frontal impact of soot and any debris contained in the gas stream; and generate a turbulent flow and reduce the speed of the gas stream downstream from the planar probe so as to select soot particles as a function of their size; thus resulting in mechanical protection of the planar probe and a uniform deposit of soot on said planar probe.
地址 Decines FR
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