L/100km from Inst. Fuel consumption.

[Toliski]

Hello guys is there any way to calculate our Litre per 100km from Inst fuel consumption? 

[cj]

you need the vehicle speed too, but as long as you have this, yes you can calculate it, on a spreadsheet or with a calculator, or a script on your pc.

Can you do it in the ECU to have it displayed on a dash etc... I dont think so.

[Toliski]

53 minutes ago, cj said:

you need the vehicle speed too, but as long as you have this, yes you can calculate it, on a spreadsheet or with a calculator, or a script on your pc.

Can you do it in the ECU to have it displayed on a dash etc... I dont think so.

Do you know the type to calculate it? 

It's a cool staff to have it at you laptop's screen and I believe it's very easy for Tech team to integrate it at Linkecu software.

[cj]

kph value / 60 = km per min (a)

inst fuel (in cc/min) / 1000 = Litres per min (b)

with these 2 values now both in X per min, you can remove the "minutes" from the equation and use the 2 values as Kilometers per Litre so (a/b) 

To calculate it as km per (whole) Litre, multiply a by 1/b

to change it from km per litre, to litre per 100km, you take 100 divide by the km-L value

 

Example:

50kph, 150cc/min

50kph / 60 = 0.8333 km/min

150cc-min / 1000 = 0.15 L/min

now that "minutes" is constant to both numbers you can simply remove it to give 0.8333km per 0.15L

mulitplication factor is 1/0.2L = 6.666

so 0.83333km x6.666 = 5.55 km/L

100/5.55 = 18.01 L per 100km