Article | REF: BM2971 V1

Spark-ignition engine - Control functions

Author: Henri MAZET

Publication date: January 10, 2003 | Lire en français

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    2. Second-level functions

    2.1 Angular motor location

    Many functions require precise knowledge of the engine's angular position in relation to the combustion cycle, such as ignition and injection controls.

    Example

    Example of configuration and processing (figure 4 )

    The target attached to the motor shaft has sixty teeth, two of which are missing. This allows precise angular registration, but with an uncertainty of one revolution in relation to the four-stroke engine cycle. This uncertainty is eliminated by reading the camshaft target, whose singularity coincides with that of the motor shaft, but which is only seen every other turn....

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