| 摘要 |
<p>PURPOSE:To regenerate a filter reliably through simple structure by arranging a gate valves in a path communicating between the upstream and the downstream sides of a filter for catching the particulates in the exhaust gas and in a path communicating between the vicinity of the inlet end section of the filter and an exhaust path. CONSTITUTION:An upstream partition wall 12 and a downstream partition wall 13 are provided in a housing 11 while a filter 16 is inserted between both partition walls 12, 13 and an electrical heater 17 is arranged near the outlet section 16b of the filter 16. A hole 19 is made on the upstream side of the upstream partition wall 12 so as to arrange a first valve 21 while an outlet port 22 formed on the downstream side of the first and second paths 14, 15 is communicated to an exhaust pipe and the donwnstream side of the first path 14 is opened/closed by means of the second valve 23. The first and second valves are closed when the particulates are caught, but they are opened when the filter is regenerated to counter flow the exhaust gas from the outlet side of the filter.</p> |
