| 摘要 |
<p>A catalytic converter is described for a lean burn spark ignition internal combustion engine. The converter comprises a first and a second catalyst matrix (12, 14) connected in series with one another. The first matrix (12) has a coating that includes an oxygen storage material and the second matrix (14) has a coating that includes a NOX storage material. To allow rapid purging of the NOX trap, the catalytic converter includes a bypass to allow a proportion of the exhaust gases to flow to the second matrix (14) without that proportion losing its HC and CO content by reacting with the oxygen stored in the coating of the first matrix (12).</p> |
