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Standard wave pattern

ExplanationofWavePattern

Thecrankanglesensordetectstherotationofasensingplate.Accordingly,theperiodT(seconds)can
bemeasuredandtheenginespeedcanbecalculatedfromthefollowingformula.

230
Enginespeed(r/min)=× 60 =
4T (sec)T (sec)

WavePatternObservationPoints

Check that cycle time T becomes shorter and the frequency increases when the engine speed is increased.

ExamplesofAbnormalWavePatterns

DExample1

Causeofproblem

Sensorinterfacemalfunction

Wavepatterncharacteristics

Rectangular wave pattern is output even when the engine
isnotstarted.

DExample2
Causeofproblem

Abnormalityinsensordisk
Wavepatterncharacteristics

Wavepatternisdisplacedtotheleftorright.

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