| 摘要 |
PCT No. PCT/CH97/00079 Sec. 371 Date Sep. 1, 1998 Sec. 102(e) Date Sep. 1, 1998 PCT Filed Mar. 3, 1997 PCT Pub. No. WO97/33080 PCT Pub. Date Sep. 12, 1997The invention relates to a spark ignition engine (1) having a pressure-wave supercharger (5) and a three-way catalyst (4). To remove the pollutant constituents HC, CO and NOx in an efficient manner, an oxidation catalyst (12) is connected downstream of the three-way catalyst, said oxidation catalyst being arranged between the outlet of the supercharger and the exhaust (11). The oxidation catalyst can, consequently, function with excess air which comes from the supercharger. The above combination reduces pollutants substantially with a high specific output of the engine. |
