| 摘要 |
PURPOSE: To absorb a considerable variation of A-F ratio and to enhance ternary purifying performance. CONSTITUTION: A catalytic noble metal, an oxygen occluding and discharging material and a highly acidic substance are carried. Since the oxygen occluding and discharging material discharges oxygen as an oxidizing substance and occludes NH3 as a reducing substance at the time of rich burning and occludes oxygen and discharges NH3 at the time of lean burning, even when A-F ratio varies considerably, the variation can be absorbed and high ternary purifying performance can be maintained. |
