The AX Eco Project : 100 mpg target !

[Vekke]

If they are that cheap I will ask an offer, thanks .

[HypermilerAX]

FYI, the flowmeters are based on a hall effect sensor and need a pull-up resistor between signal and 12V to work (1,6 to 2,2 kohm) which are not included.

[renault_megane_dci]

I believe you are building a great scan gauge alternative for older cars.

I don't know if there is a market but there is definitively material for a new thread (and if not, this one might be jacked up)

[AndrzejM]

Originally Posted by HypermilerAX

The flowmeters are rather cheap (20€ each) but the unit was expensive : 150€.

You can use Arduino to measure fuel flow with flow meters. Some MPGuino code changes would be necessary, but it's doable. There is a thread related to the issue http://ecomodder.com/forum/showthrea...sel-16711.html

[HypermilerAX]

Originally Posted by renault_megane_dci

I believe you are building a great scan gauge alternative for older cars.

I don't know if there is a market but there is definitively material for a new thread (and if not, this one might be jacked up)

Thanks, I will think about it.

Originally Posted by AndrzejM

You can use Arduino to measure fuel flow with flow meters. Some MPGuino code changes would be necessary, but it's doable. There is a thread related to the issue http://ecomodder.com/forum/showthrea...sel-16711.html

The next step would be to have the fuel consumption in l/100 km. For that, I already have an alternative signal (self-made, my speedo is mechanical) for speed. Now, I would need something that can handle the different types of signals in input, do the calculation ((flow2-flow1)/distance) and display it.

Is Arduino capable of that and how complex would that be ?

[AndrzejM]

Originally Posted by HypermilerAX

Now, I would need something that can handle the different types of signals in input, do the calculation ((flow2-flow1)/distance) and display it.

Is Arduino capable of that and how complex would that be ?

Of course it is! You just need to do some major changes to the code if you want to have an instant FE reading. If you just need an average it's fairy simple because all you need to do is counting pulses from both flow meters and do some match to have it displayed as l/100km, mpg, km/l etc.

If you want to have instant reading you have count time between pulses on both flow meters.

[HypermilerAX]

I was just caught in a traffic jam (very slow but also very short). 300 m stop&go in first gear at about 3 km/h average, I consumed 48,1 mL in 220 m = 21,7 l/100 km

[renault_megane_dci]

Yeah, we all try to avoid that but that's good to know how much it does cost.

[sinclair]

I'm running a stock AX 1.5 on 50-75% veg oil at the moment and getting 75 mpg (imp) or 3.8 l/100km so I have some way to go. I have an air leak into the fuel line to track down at the moment but once that's sorted i'm back on the MPG case. Weight to loose, gaps to seal and an alternator to loose.

[HyperMileQC]

You mean 38 KPL?