| 摘要 |
<p>Disclosed is a combined particulate filter and hydrocarbon trap for use in collecting particulate matter and trapping hydrocarbons in exhaust gas wherein the particulate filter comprises a porous substrate having both inlet and outlet surfaces which are separated from each other by the porous substrate wherein either or both of the inlet and outlet surfaces are coated with a washcoat comprising a hydrocarbon adsorbent material. The combined particulate filter and hydrocarbon trap is for use in collecting particulate matter and trapping hydrocarbons emitted from exhaust gas of an internal combustion engine in a vehicle, particularly a gasoline direct injection engine and more particularly a gasoline direct injection engine at cold start.</p> |
