Equation of the SAW signal: need some explanation
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Equation of the SAW signal: need some explanation
In the EDIS documentation, I read this:
The initial equation: SAW = ZTDC - (ST × T × 2.sup.x/CMI)
So, if I understand correctly:
ZTDC = 1536 microseconds
T = 0.000004 second
CMI = 10 °
What is 2.sup.x?
I don't understand this :
* 2.sup.x is the number of steps between position signals for a desired spark resolution and x is a whole number
The final equation is thus:
SAW = 1536 - (25.6 × (desired spark advance in degrees)) (in µsec)
Range: 64 - 1792 µsec (57½° BTDC to 10° ATDC)
Resolution: 4 µsec
Could someone explain to me 2.sup.x (in an "easy english" and the correct values if possible)?
If someone has documentation about the working of an EDIS module, it would be great!
Thanks in advance
Ludovic
Engine: 1300 cc hyundai (G4EH), 4 cylinders, port injection.
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Bernard Fife
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To understand the inner workings of the EDIS module, read US patent numbers 4,661,778, 4,922,874, and 5,014,676 at http://www.uspto.gov.
Lance.