| Exhaust gas recirculation system |
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| For certain operating conditions, the intake air is supplied with exhaust via the exhaust gas recirculation valve -N18-. A decrease in the combustion temperature and therefore an improvement of the exhaust composition is achieved by adding to this mixture. |
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| The actuation of the exhaust gas recirculation valve -N18- is performed by the engine control unit. |
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| Any desired valve position is possible as a result of the pulsed operation. |
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| An exhaust gas recirculation valve -N18- blocked in open condition is indicated through poor idling behaviour. |
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