3223 Waveform Query

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3223 Waveform Query

Postby PeterM » Fri Jun 26, 2009 5:31 pm

Hello forum - I would be grateful if anyone of you can answer this.

If I am looking at the waveform across the view of an idle speed control valve - digital signal. Is this waveform just a repetition of one cycle continuously?
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Postby Matt Williams » Tue Jun 30, 2009 6:23 pm

Thanks for your post.

This is quite difficult to answer without seeing the waveform captured or knowing what type of idle speed control is used.

The most common type is a small pintle driven against a spring, the amount of on time for the power to the motor determines the position and thus the amount of air allowed into the engine. This type of actuator will give a pulsed waveform with some time spent usually at 12V and the rest at zero.

Hopefully this helps, if you need anything further just let me know.

Regards, Matt
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