| 摘要 |
<p>PURPOSE: To improve adsorbing efficiency of an HC adsorber to extend the holding time of the HC so as to prevent the HC which is not purified from being discharged, in an exhaust emission control device. CONSTITUTION: An adsorbing maternal 3 for adsorbing unburnt component included in exhaust gas is fixed on a wall surface 21 opposing to an exhaust port 11, in an exhaust manifold 2 communicated with the exhaust port 11 in an internal combustion engine 1, and a catalyst 5 for purifying exhaust gas is arranged in an exhaust passage 4 downstream of the exhaust manifold 2. An end surface 31 opposing to the exhaust port 11 of the adsorbing material 3 is recessed in a curved shape, and collision force of exhaust gas in averaged so as to improve heat radiating performance.</p> |
