| 摘要 |
In an apparatus for purifying exhaust gas of an engine, both upstream and downstream catalysts are disposed in an exhaust pipe in series. The upstream catalyst is divided into upstream and downstream catalyst blocks to form a space portion therebetween, so that an exhaust pulsation generated by an exhaust manifold is transmitted to the space portion. By the exhaust pulsation, exhaust gas in the space portion flows repeatedly into a downstream part of the upstream catalyst block and an upstream part of the downstream catalyst block. Therefore, when an amount of a precious metal carried by at least one of the downstream part of the upstream catalyst block and the upstream part of the downstream catalyst block is increased, exhaust gas can be effectively purified. Accordingly, a purifying ratio of exhaust gas can be increased effectively using the exhaust pulsation. |
