| 摘要 |
The device comprises a) means (16) for determining an instant subsequent to the extinguishing of a spark produced in a spark plug for igniting the air/fuel mixture contained in a cylinder of the engine, b) means (7, 9) for therefore powering the spark plug (11 to 14) with a predetermined electric voltage capable of giving rise to the passage of a current through this spark plug if the gas present between the electrodes of the spark plug results from an ionising combustion triggered by the spark, and c) means (10) for detecting the current which may be passing through the spark plug. The absence of current signifies nonionisation of the gases contained in the cylinder, and therefore the occurrence of a misfire. Application to the protection of a catalytic converter containing an oxidising catalyst for oxidising the exhaust gases of the engine. <IMAGE>
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