Method and apparatus for varying the spacing of sequential ignition control pulses emitted by an ignition pulse transducer

An apparatus for varying the spacing of sequential ignition control pulses emitted by an ignition pulse transducer, comprising:

• a converter receiving the sequential ignition control pulses emitted, for generating a voltage proportional to the phase difference of the sequential ignition control pulses;
• a shift memory device connected to the converter and receiving the sequential ignition control pulses emitted, said shift memory device having at least two storage locations for storing information derived from the converter;
• a comparator device connected to the storage locations of the shift memory device, for ascertaining changes in the phase difference between successive pulses of the emitted ignition control pulses by comparing the information stored in the storage locations;
• a limiting circuit connected to the comparator device, for establishing a maximal phase difference of successive pulses of the sequential ignition control pulses;
• a timing circuit connected to the limiting circuit and receiving the sequential ignition control pulses emitted, for generating a sequence of pulses representing the phase difference between successive pulses which results from comparing the information stored in the storage locations by the comparator device when a decrease occurs in successive phase differences;
• and
• an adding circuit connected to the timing circuit and receiving the sequential ignition control pulses emitted, for generating a corrected ignition control pulse train including the sequence of pulses generated by the timing circuit.