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Old 05-20-2008, 06:45 PM   #11 (permalink)
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To clarify, it isn't a question of "if". People have been working on it already and continue to work on it.

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Old 05-20-2008, 06:49 PM   #12 (permalink)
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Aha. Gotcha. It'll be interesting to see how that will work.
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Old 05-20-2008, 06:59 PM   #13 (permalink)
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A lot of the carbureted stuff is here, it has a ways to go but we are learning more all the time:

http://forum.ecomodder.com/showthrea...gine-1123.html

John is still making progress (and I will be stealing his cheap fuel flow sensor if he gets it going for the masses), I had to take a break from it after a frustrating effort on the motorcycle.

I need a volunteer or three with an old diesel or three who can hook up a couple sensors to their old diesel rabbits or mercedeses or mack trucks to get anywhere on the diesel side.
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Old 05-20-2008, 10:37 PM   #14 (permalink)
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Quote:
Originally Posted by dcb View Post
I need a volunteer or three with an old diesel or three who can hook up a couple sensors to their old diesel rabbits or mercedeses or mack trucks to get anywhere on the diesel side.
I work on Diesel trucks every day and we have a local company that parks on our lot and we service them weekly. All have Cat engines in them. Need help?
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Old 05-20-2008, 10:50 PM   #15 (permalink)
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Tell me about it? Are they strictly mechanical injection?

I'm thinking with a "simple" sensor to count the injection pump revolutions and a throttle position sensor that the fuel consumption can be computed. Add a speed signal and you've got a DIY MPG gauge for semi's.
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Old 05-22-2008, 09:28 PM   #16 (permalink)
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We have regular customers with older "mechanical injection" pumps on them, but the newer engines are electronically controlled. The speed signal could be tapped in at the rear of the trans, but no TP on them.
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Old 05-27-2008, 12:00 AM   #17 (permalink)
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Yah, the mechanical diesel version is probably going to need some sensors installed, nothing fancy: rpm (or pump revolutions), throttle position, and vss if it isn't handy.
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Old 06-12-2008, 09:43 AM   #18 (permalink)
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A few questions on this Arduino-based gauge:

- If you don't mind the added expense, would the new Nano model make any difference?

- Does it matter if your car has throttle-body injection (i.e.- just one injector)?

- Is there an even more basic way to convert the two inputs (vss and injector) into a single instantaneous number? A dedicated one-inch high digital readout of XX.X with "mpg" would be fine for me.

Thanks for any info
Russell
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Old 06-12-2008, 01:14 PM   #19 (permalink)
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You could definatly implement some 7 segment LEDs to run a simple gauge.

I'm actually deciding between using a 40x4 LCD, and 4 7segment LEDs. I dont know if I want to see it all (40x4) or just some of it (7 segments).

There are nice 4 7 segment LED i2c controllers that would cleanup a lot of the wiring (at least off load it).
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Old 06-12-2008, 01:52 PM   #20 (permalink)
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Just FYI, the target display for mpguino version 1.0 is a 16x2 LCD. It isn't hard to get more items to display on a larger LCD if you can figure out the program, but don't go out buying a jumbo LCD/LED of arbitrary size and expect it to magically fill up with useful data

Here was the agreed upon model if you want to eliminate some variables in yoru setup and improve your chances of getting help: http://nkcelectronics.com/16x2-lcd-m...backli162.html

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