mpguino TDI feasability - Page 2 - Fuel Economy, Hypermiling, EcoModding News and Forum

dcb · 07-23-2008, 08:50 AM

I'm guessing the N146 quantity valve signal would be a lot easier to read than the variable inductor on the position sensor. If you hooked up the former to an mpguino today you should get a signal similiar to injector duty cycle. Though I think an RPM signal will need to be added to make complete sense out of the quantity signal or sender. Like maybe on t28 (on the schematic) use pin 10 for the rpm signal, and pin 27 for the vehicle speed signal.

If adding a signal, I'd suggest analog 1 for the engine speed, and the usual 100k resistor with a 5.1 zener for now. And the PWM for quantity just like the injector signal (through digital pins 2 and 3), and leave vehicle speed on analog 0. Then everytime you get a rpm signal, look at the current quantity signal and figure out how much fuel just was squirted in.

afranco · 07-23-2008, 02:56 PM

Hello all,

Unfortunately I won't have time to build an mpguino for another month (and I don't know much about engines), but I do have a 2003 Jetta TDI that I'd like to get an mpguino working on. Just thought I'd drop in and mention interest in this endeavor and a willingness to try things out on my TDI once I get the mpquino built.

- Adam

dremd · 07-23-2008, 04:02 PM

i was actually looking for the therad known as build one last night, but couldnt locate it, could any one tell me what to order to get the ball rolling?

dcb · 07-23-2008, 04:06 PM

Oops, here it is:
http://ecomodder.com/forum/showthrea...html#post22856

Leaning towards the iDuino these days and the green LCD from mouser. The rest can be had at the "shack" or mouser

cmags · 07-23-2008, 06:41 PM

Hey DCB, could you post a link to that green LCD from mouser? I looked thru the catalog, and there's like 50 green/yellow LCD's, and you can't sort by driver chip type.

dcb · 07-23-2008, 06:51 PM

I added it to post 1, but here it is. I should do the whole mouser part number list thing
NHD-0216K1Z-FL-YBW

It should have good temperature response as well, and it has pins on the top and bottom if that makes things any easier.

cmags · 07-23-2008, 06:53 PM

Oh, I didn't see it - there's a lot of info in that first post. Thanks again!

dremd · 07-24-2008, 06:33 PM

Parts ordered.

dcb · 07-25-2008, 08:56 AM

sweet

dremd · 07-28-2008, 12:13 PM

Just got shipment notifications!
I'm getting Excited.