| 摘要 |
A system for exhaust gas purification disposed in the exhaust pipe of an internal combustion engine, includes: an adsorbent formed by loading, on a first honeycomb carrier, an adsorbent layer containing an adsorbent component having a hydrocarbon adsorptivity, and a honeycomb heater formed by fixing, to a second honeycomb carrier made of an electrically heatable material and having a large number of passages, electrodes for electrification of the carrier, the honeycomb heater being provided downstream of the adsorbent in the flow direction of the exhaust gas emitted from the engine. In the system, the adsorbent and the honeycomb heater each have a catalyst component loaded thereon, the total volume of the adsorbent and the honeycomb heater is 0.8 liter or larger, and the volume of the adsorbent is 0.4 liter or larger. This exhaust gas purification system can very effectively adsorb the unburnt HC emitted from an internal combustion engine during the cold start and can purify each of the HC, CO and NOx emitted from the engine, to a very low level.
|
