| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To detect conductive exhaust fine particulate in exhaust gas with high precision. <P>SOLUTION: A pair of electrodes 3, 4 are arranged in an exhaust passage 2a. A current detecting means 53 detects a current flowing between the electrodes 3, 4 when electrical discharge is generated in a space between the electrodes 3, 4 by applying high voltage between the electrodes 3, 4. The amount of the conductive exhaust fine particulate in the exhaust gas is measured based on the electric conductivity of the space between the electrodes 3, 4 which is found from the detected current. Since the exhaust fine particulate is electrostatically charged by the discharged electron, it is unnecessary to make the exhaust fine particulate contact with the electrode 3 so that it is possible to measure the amount of the exhaust fine particulate with high precision. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
