Abstract: The present invention provides a device and a method for cylinder sensing in an internal combustion engine.

Abstract: The process for ignition detection for an ignition system in a combustion engine wherein a first ignition pulse is generated in a cycle for generating a first ignition spark and at least a second ignition pulse for generating a second ignition spark provides that the alternating voltage for generating at least the second ignition pulse has one or more periods with half-waves having different amplitudes. The first half-wave has an amplitude between the maximum voltage required in the presence of ionization between the electrodes of a spark plug in the ignition system, and between the minimum voltage required in the absence of ionization. The second half-wave has an amplitude exceeding the maximum voltage required. The criterion measured for an ignition of the fuel-air mixture having taken place is whether or not the second ignition spark was generated with the first half-wave of the alternating voltage.

Abstract: An alternating current based ignition system, in which a computer, in which a motorspecific data recognition field ("look-up" table) is stored and which is provided by sensors with operating parameters, controls the duration of the alternating ignition current and the ignition coil energy.