| 摘要 |
PURPOSE:To improve the performance of an exhaust-gas purifying apparatus and to increase its durability, by keeping catlyst type reactor at an optimum temperature by disposing a heat accumulating medium molten at a temperature higher than a prescribed value in the catalyst type reactor disposed at a portion of an exhaust passage or on the upstream side of the same. CONSTITUTION:A catalyst type reactor 2 disposed at an intermediate part of an exhaust passage 1 of an internal combustion engine includes a filter member 3 coated with an oxidizing catalyst. A casing 5 disposed in the manner of surrounding the filter member 3 incorporates therein an intermediate wall 7 which is disposed on the outside of an inner wall member 6 with a prescribed spacing from the same, and the outer surface of the intermediate wall 7 is coated with a heat-insulating material 9. The space formed between the inner wall member 6 and the intermediate wall 7 is changed with a heat accumulating medium 4 consisting of a molten salt of the mixture of lead phosphate, potassium nitriate and sodium cobaltinitrite having a melting point of about 200-300 deg.C or a Teflon type plastics or wood metal having a melting point of about 200 deg.C. |
