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Statistic Fault Protection of Catalytic Converter

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The catalytic convert of each engine bank is monitored within an interval of 200 crankshaft revolutions periodically. Misfire detected are weighted (over engine load and revs) and added for each engine bank separately. As soon as the bank sum counter exceeds a predetermined value, an error report for each cylinder with misfire is stored. Additionally, the MIL is switched on immediately and the worst cylinder is switched off (injection off and lambda control switched to open loop). If more then one cylinder did have misfire an error report for multiple cylinder will be stored.

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