| 摘要 |
PURPOSE: To excellently purify a harmful component such as CO, HC, NOx in exhaust gas, under such a condition that warming-up is not finished just after an engine is started. CONSTITUTION: In an exhaust emission control device 10 having at least a first exhaust gas purifier 16 and a second exhaust emission controller 17 which are sequentially arranged from the exhaust gas outlet of an internal combustion engine 1 toward the lower stream of an exhaust gas flow, at least one ceramic honeycomb structural body whose cross section of a cell is hexagonal, is loaded on the first exhaust gas purifier 16. |
