My first idea was create a Igniton System using only one point as crankshaft index for the calculations, but in a short time I noticed it is not a good idea, it is very hard to predict revolution time with calculation. For this experience was created a support for a automotive hall sensor (flywheel sensor for VW GOL application), the aligment is the index on the TDC. I will show you bellow:
This is the first aquisition using a digital oscilloscope:
This is the first aquisition using a digital oscilloscope:
We must have in mind what the speed of crankshaft is not constant during the time and this characteristic is fundamental to understand the needs of control solution, because we need estimate the next period.
Is not trivial to do a predictive calculation and my experience it was not the best, I understand that you need more point to use as reference, specially in my case, where I set my index in TDC…
For more accuracy, was created a flywheel with 60-2 teeth , it was sculped using a rotary tool as show below:
This is a comparison balance (2 tooth) for static balance of the flywheel
Here, I tried to align the flywheel
Optical sensor support
Initial test with a hammer drill fixed in a table and a optical sensor
My father as technical support... : )
After finished the first test and validate the concept, I assembled my creation in the engine:
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