Method and device for monitoring the electrode gap of a sparking plug

摘要

The invention relates to ignition systems for the sparking plugs of internal combustion engines. The invention is in the fact that measurements of the duration D of the spark and of the plateau voltage U at the terminals of the primary winding (PRI) are carried out and that these measurements are compared in a computer (CAL) with thresholds Ds min, Ds max and Us min and Us max, corresponding to the class of operation in progress in order to determine an electrode gap which is too big if D > Ds max and Us max or a gap which is too small if D > Ds max and Us min. The invention is applicable to motor vehicles. <IMAGE>