Obdii Vpw

[srspinho]

Hello friends !

Well, this last weekend, I did install my On-board computer in my Opel Corsa and drove about 250 km in a short trip to the beach.

I was driving in a very good road with a perfect asphalt. But, the road has some small declivity and some small ascent also.

When I´m driving at 90 km/h / 3500 RPM on 5th gear, in a very plain part of the road I can read a consumption of 14 / 15 Km / L (almost constant) - Normal for my small 1.0 L engine.

But, when in the same conditions I get a small declivity, the engine´s load is smaller so, the car´s ECU control the necessary amount of gasoline which is lower even if the speed and the RPM are the same. In this case I can read 20, 25, 30 km/l

In the other way, if I get a small ascent, the gasoline´s consumption gets really high and I can read something like 7 or 8 Km / L at the same conditions, since the engine needs to burn more gasoline to keep the speed.

I don´t know if it is right, but, I think it makes sense.

Regards !

Sérgio

[leisryan]

Guys
Whatabout if the injector is low impedance and using pwm to regulate current or voltage? how can we measure fuel then? do we need to create a fuel lookup table in a particular RPM range?

Yours trully
ryan

[Acetronics2]

Hi, Sergio

My '2004 Honda Civic 4 doors has a Genuine Fuel meter aboard ...

I confirm what you've seen ... differences due to road declivity are the same ratios ...

That confirms we drive with lead shoes !!!

Now, for absolute values ... just compare what you've put in your tank to what your computer tells ...

a simple ratio coeff. will perfectly fit !!!

Alain

[srspinho]

Thank You Alain !

Sérgio