The IC inside the CDI

[tzr-v4]

But in the end the 37 degrees static angular is the one we need.

Why are you looking for edge alignment ?

Green is the pickup signal
Yellow is ?

[Louis]

Why are you looking for edge alignment ?

I noticed that the oem IC has this alignment to. Think it is the static angle alignment
Shown with the scope

Here you have the oem IC at 60Hz


You see its the same point

Green is the pickup signal
Yellow is ?

Green is pickup
yellow is ignition pin 22

Here you have the oem IC at 100Hz

It is still there



Only the pulls in frond is changing with rpm or tps movement.

[tzr-v4]

I've tried to do timing light this afternoon but seems that till now I'm not able to setup correctly the light and/or the disk.

the timing light default setup is :
- 4 cylinders / 4strokes
- 1 spark per 2 rpm

Manage to setup to 2 sparks per rpm so RPM reading was correct.

Was not able to have a steady figure on the disk... 

Here my disk.

[Louis]

Was not able to have a steady figure on the disk... 

Think it will be difficult to let the 2XT engine run that stable (like a electro motor)
Although the base advange should be readable in a certain rpm range (like 750 till 1500 rpm)

How many degrees did you have?

Here my disk.

Disk is looking fine
Perhaps a extension point closer to your disc would help

[tzr-v4]

I'll setup a reading point bolt on the crank case.

Maybe the light was not setup properly 

[Louis]

Olivier,

You mailed me a ignition firmware curve, how did it go?
Had the feeling it was jumping from 20 to 30?

Can you make one from19 till 30 degrees from 1000rpm till 4000rpm

[tzr-v4]

The curved one is :
RPM : 500 1000 1500 2000 ..... 15000
CDI :    19     19     19     28 28 28 28 28 28 28 28 28 28 28 28 28 25 21 17 14 5 5 5 5 5 5 5 5 5 5

I'll make one with linear evolution of Curve from 19° to 30° between 500rpm and 4000rpm

[tzr-v4]

Louis,

I'll email you this curve to test
Blue = theoretical (floating point)
Red = experimental (interger)

[Louis]

Got it (saved on a usb stick)
Gona eat first will post the results later tonight

[tzr-v4]

I'll save time tomorrow to go in the garage 
I've printed a counter clockwise timing disk so CDI advance will be read at TDC.

Louis in your tests with ICP12: do you use IC pin 13 or T2333 pin 4 ?

[Louis]

Hello Olivier,

Louis in your tests with ICP12: do you use IC pin 13 or T2333 pin 4 ?

T2333 pin 4

Got some results, but difficult to tell what I have got
It looks like the firmware is not stable, it is dancing on some parts

Here you have a quick movie off the curve. (Its more stable on the higher rpm range)
http://www.youtube.com/watch?v=yVus5aanvJU&list=UUJ-OK_OH_WZ_QFL6eqcVPMA
You certainly see the movement off the ignition curve

Think it has something to do with the different outgoing signals. Witch probably the iCP12 doesn't suppose to do that

Some snap shots

Bigin in rpm till about 80Hz it got different extra pulses, witch probably cause the dancing off the ignition point


Later it is getting a kinda, one pulse from about 80Hz



That pulse is later around 130hz sometimes one long pulse are a split long pulse. (seen in one snap shot)

But the outcome on the timing light vs timing discs is relative good

Did got a 28 degrees at 4000rpm relative steady

Perhaps we need some kind off filter on the mass signal, like a 0V with a tolerance

[tzr-v4]

Can you test steady rpm values and report the measured values on timing disk
- 500    => 19°
- 1000  => 20°
- 1500  => 22°
- 2000  => 23°
- 2500  => 24°
- 3000  => 25°
- 3500  => 27°
- 4000  => 28°

[Louis]

Ill will try, But it will be difficult its not that stable.

http://www.youtube.com/watch?v=yVus5aanvJU&list=UUJ-OK_OH_WZ_QFL6eqcVPMA
On the movie you can see the rpm vs degrees. (the small digital tacho on top is the reason I placed it there )
(If you stop the movie and go step by step you can see many degrees)

[tzr-v4]

The precision needed is stable at +-0.5° around the target (FPE kart engine builder http://www.fperacing.com/).

It seems OK on the movie from 2300rpm to 4000rpm.

[Louis]

It seems OK on the movie from 2300rpm to 4000rpm.

That's the range where the two ignition pulses go to one.