Atlas Fahrzeugtechnik Gmbh

Klemens Kluppel

Albert Stubs

An arrangement for the generation of a trigger pulse for the ignition of an internal combustion engine. Crankshaft angle pulses representative of the rotational angle of the crankshaft are generated. The technical problem is an increase of the correction possibilities by the storage of all setting values for the ignition characteristic field and of the operating data for the internal combustion engine in the correction value memory. A speed-dependent temperature correction of every single trigger pulse is desired. Between the angle address counter and the correction value memory a hold circuit is inserted. For the angle address signal of the angle address counter a decoder is provided which delivers control signals upon occurence of certain angle addresses. An A/D converter is provided for the conversion of analog pressure and temperature values. For the digital pressure value and the digital temperature value each a hold circuit is provided, the outputs of which are connected to address inputs of the correction value memory. A pulse delay counter, the presetting of which is effected by a temperature correction signal, is connected to the output of the trigger counter.

Arrangement for the generation of a trigger pulse

An ignition system for an internal combustion engine with the following structure: a pulse generator generates synchronously with the crankshaft rotation angle pulses and one reference pulse; within a first angle interval of the crankshaft rotation, for the determination of a speed value, clock pulses are counted and a load value is converted into a multiple-bit value; accordingly a characteristic field storage is sampled; an ignition counter is preset, which delivers, by the counting of angle pulses, a switching pulse for the ignition signal; the speed value and the load value are stored at the end of the time basis in buffers; the characteristic field storage comprises multiple-bit ignition values for the determination of the ignition angle and for the presetting of the ignition counter. The technical problem is the provision of an ignition system, which has a high detection speed so that within the periods available also at high speeds a reliable determination of the ignition value, under consideration of the necessary correction values, is possible. The angle pulses are utilized as clock pulses. A correction field storage contains multiple-bit correction values in temperature/load/speed characteristic fields and/or octane/load characteristic fields. During a subsequent correction angle interval the count value of the ignition counter is additively or substractively corrected by the multiple-bit correction values.

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Neuenrade, Germany

Klemens Kluppel