Exhaust-gas purification device with an adsorber for hydrocarbons

摘要

An exhaust-gas purification device for an internal combustion engine comprises, in series in the direction of flow of the exhaust gas, a first catalytic converter (6), an adsorber (7) for hydrocarbons and a second catalytic converter (8) in a common housing (1). These three components are designed in such a way that, when the engine is started cold, the two catalytic converters (6, 8) reach their light-off temperature before the adsorber (7) reaches its desorption temperature. <IMAGE>