ZFuel

[superlen]

Zed,

Yes, I'm a hardware/firmware design engineer & I've been writing windows code for almost 10 years. I posted a screen shot early on in this thread. The gui has changed a lot of course, but this gives a general idea. Look back up to post #25 for details on it. I'll try to include the picture here as well.

screenshot1 | Flickr - Photo Sharing!

Apparently with all my mad ECU design/software skills I've been touting I can't make this picture show up in this forum.. Just the link.

Lenny

Edited December 2, 2013 by superlen

[Captain Obvious]

Apparently with all my mad ECU design/software skills I've been touting I can't make this picture show up in this forum

[Captain Obvious]

The breakout board sounds like a great idea. I miss having access to facilities to do stuff like that.

When I set-up my test bench, I did not have an AFM loose so I just tried to cobble together a substitute with pots and resistors. I also used a sig-gen for the ignition input and the bottom line is that I never got injector pulses and I didn't have the time to figure out why.

I'm not sure if there was a problem with my simulated AFM or if my faked ignition pulses weren't good enough to fool the ECU.

[superlen]

Captain,

Thanks for posting the pics in the thread. For the life of me I couldn't get the tags to work properly.

On your test setup I'm guessing it was your ignition pulses weren't high enough voltage. I have the same problem firing the stock ECU on the bench. The ECU is set up to work from the flyback on the coil & there is a threshold (I don't know what it is yet - maybe 30-40V???) that has to be met. Neither of our signal generators were hitting this mark. I hadn't thought about that when I made the breakout board or I would have put some sort of HV pulser on there.

Lenny

[superlen]

Here are some latest GUI pics.

I do want to stress that most people are NEVER going to have to see any of this. Just plug the HellFire in place of your stock ECU and party on. But for those who want to modify, tweak, play, or twiddle, the GUI is going to be nifty. Also note in these pics you might see random buttons and hacks that I have in there for testing. Ignore anything that looks silly.

Here is the main configuration screen for the overall system showing how to set which method of Air measurement you like. You can also see some of the other settings such as fuel pump prime seconds.

Here is the screen showing the Sensor list. Each sensor has its own calibration data (shown later) that can be tweaked to accommodate any analog sensor you throw at it. The unit will ship with calibration for the stock sensor obviously, but if you find yourself wanting to use a coolant sensor from a Ford Escort or a Yugo, you can. I will however, make fun of anyone who puts a Yugo part on a Z car.

And finally, here is a shot of the calibration screen showing the coolant sensor. By adjusting the numbers in the table at the left one can tweak around the curve that fits your sensor. The graph is mostly just for visualization to give some feedback that you aren't typing in something stupid in the table. The graph for most all sensors should be a fairly smooth curve. The number of data points to fit the curve is limited to 16. You can use as little as 2 points or a max of 16. The ECU then does a piecewise linear interpolation between the closest two input points when calculating the output.

As always, feed back is appreciated.

Len

[EuroDat]

Hi Lenny,

Its really impressive work your doing and the GUI looks clean and easy to use:D

Chas

[240260280z]

Hey Len,

If you have data tables that you want reduced to 2nd or 3rd order polynomial equations. I can do the curve fitting and reductions if it helps.

[rcb280z]

That's what I'm talking about Lenny, "plug-n-play" all the way for me

Nothing complicated

Hmm....knew I shouldn't have made that statement regarding price.

Oh I see FastWomen, the things that I heard referred to as "chips" on occasion. Thanks for the insight.

[TomoHawk]

The really net thing about "chips" is how they got that name.

[superlen]

Chas,

Thanks for the compliment.

Blue,

I may take you up on that a little later on. I remember us discussing the curve fit software you have & it was pretty cool. While I'm not implementing equations in the realtime code, it would be useful in calibrating different non-stock sensors.

Len

[240260280z]

I'll be glad to help.

Get the device working, debugged and optimized with the Datsun crowd then make money off the Porsche guys.

[FastWoman]

Looks like a well laid out GUI! Very exciting!

So I saw a pic of a flaming red pickup in your photo stream. I'm hoping that's not how your Hellfire board got its name!

So Tomo, why is a chip called a chip?