| 摘要 |
A vehicle comprising a spark-ignited internal combustion engine for igniting a combustion mixture, an exhaust system 103 comprising a catalytic converter 105, and an engine control system 113 configured to identify a demand for a reduction in engine torque and in response interrupt sparking of the internal combustion engine for a period of time, the engine control system being configured to limit the sparking interruption so as to maintain the temperature of the catalytic converter below a predetermined temperature by preventing the expulsion of excess amounts of unburnt combustion mixture to the exhaust system, thereby preventing the thermal degradation of the catalytic converter. |
