| 摘要 |
An exhaust gas purifying system for efficiently purifying HC discharged at time of cold starting of an internal combustion engine. This exhaust gas purifying system includes an HC adsorbing/purifying catalyst disposed in an exhaust gas passage, and a three-way catalyst disposed upstream of the HC adsorbing/purifying catalyst in the exhaust gas passage. The HC adsorbing/purifying catalyst includes a monolithic carrier having a sectional diameter (d) and a length (L) set in a relationship represented by 0.70<=L/d, and a hydrocarbon adsorbent layer and a purifying catalyst layer, which are formed on the monolithic carrier. |
