| 摘要 |
An exhaust system (8) for a diesel engine, which engine being operable in a plurality of modes including an idling mode, wherein the engine emits a relatively cool exhaust gas, and a running mode, wherein the engine emits a relatively hot exhaust gas, comprises a solid NOx absorbent (18), whereby NOx is absorbed by the NOx absorbent (18) during said idling mode and is desorbed and passed to atmosphere during said running mode and/or during acceleration from idling to running as the temperature of the exhaust gas increases, wherein during all modes the engine runs lean and the exhaust gas composition is lambda >1.
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