| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a particle sensor and an exhaust emission control device to accurately compute the amount of particles contained in the exhaust gas without directly detecting the temperature and the flow volume of the exhaust gas. <P>SOLUTION: The particle sensor which detects the particles contained in the exhaust gas that flows through an exhaust air stream is provided with a first detecting filter which is placed in the exhaust air stream and can capture the particles, a second detecting filter which is placed at the downstream side of the first detecting filter in the exhaust air stream and can capture the particles, a first pressure difference detecting means which detects a first pressure difference between the upstream side and the downstream side of the first detecting filter, a second pressure difference detecting means which detects a second pressure difference between the upstream side and the downstream side of the second detecting filter, and a particle amount detecting means which detects the amount of particles based on the detecting result of the first pressure difference detecting means and the detecting result of the second pressure difference detecting means. <P>COPYRIGHT: (C)2011,JPO&INPIT |
