| 摘要 |
<p>PURPOSE: To enable collected soot particles to be ignited and burnt-off easily by forming blind ducts branching from outer bends of exhaust gas ducts in a filter formed by meander-shaped exhaust gas ducts passing through porous ceramic filter material. CONSTITUTION: A filter element 1 is made of porous ceramic filter material 2. Meander-shaped exhaust gas ducts 3 pass through it from an inlet side to an outlet side. Blind ducts 4 branch from each of the outer bends of the exhaust gas ducts 3 in the build-up direction of the filter element 1. In order to lower the ignition temperature of the soot particles, catalytic coating is provided in the blind ducts 4. Directing ducts 5 parallel to the blind ducts 4 are arranged. The directing ducts 5 are open to the outlet side. When exhaust gas flows in the exhaust gas ducts 3, soot particles in the exhaust gas are delivered to the blind ducts 4 branching from the outer bends of the exhaust gas ducts 3 by centrifugal force and deposited there, and ignited and burnt off in the blind ducts 4.</p> |
