| 摘要 |
PURPOSE:To achieve purification of the aroma content accounting for approximately the half of the components in exhaust gas by arranging a catalytic converter rhodium taking Pd as a component close to an HC adsorbent for adsorbing HC in exhaust gas at the specific distance. CONSTITUTION:In a catalytic converter 1 connected to an exhaust system of an engine of a vehicle, the front end of a catalyst case 6 is connected to an exhaust gas inlet 4 through a cone part 5. A Pt-Rh catalytic converter rhodium 9 having the high purifying effect of olefine and paraffin out of the type of HC is arranged on the front stage as the upstream side in the case 6, and an HC adsorbent 10 for adsorbing HC in exhaust gas is arranged on the intermediate stage. Moreover, a Pd catalytic converter rhodium 11 having the high purification effect of the aroma content is arranged on the rear stage separated from the HC absorbent 10 at the specific distance. Thereby, unburnt HC is burnt and purified by the Pd catalytic converter rhodium 11, and all aroma contents accounting for approximately the half of the exhaust gas components can be approximately purified. |
