VW Lupo 3L --> 2L

[Jyden]

Congrats - great job! Lupo rules !

[euromodder]

Pretty neat !

That's 57g CO2/km.
You'd qualify for exemption of the London Congestion Charge

[Vekke]

Here is the video which is pretty long...

http://www.youtube.com/watch?v=CShMR...ature=youtu.be

[HypermilerAX]

Doesn't increasing the power of the engine increases consumption, the load of the engine being lower?
With your data, I calculated that your engine has 29% efficiency (289,9 g/kWh) during your record. To make 2 l/100 km at 100 km/h you need 34,66% efficiency.
On a stock Lupo, the best efficiency at stabilized speed and on the flat is achieved in 5th gear at 150 km/h. At that speed, the car burns 5,52 l/100 km (SSP_218) which makes 33,56% efficiency (250,5 g/kWh). And the engine turns at 3158 rpm which means that better efficiency can be achieved at lower rpm (1500-1750?) and equal load which means... custom bigger gearing (like 60 km/h at 1000 rpm or even more). What is your engine load at 100 km/h?

[ausias]

I'm guessing (predicting witrh a fuel consumtpion model) that your cars fuel consumption is:
speed (km/h) f.c (L/100km)
65 1.63
73 1.78
80 1.91
90 2.10
93 2.15
95 2.21
100 2.32
120 2.90
130 3.14
160 4.17

But because the winners car is running on E85 (i quess in a petrol engine) you must multiply your fuel consumtion figures by a factor higher than 1.15 (ratio of energy between diesel and gaoline) but E85 has 33% less energy per liter than gasoline so aprox. 1.5 or so because E85 has less energy per mass than diesel, but also because the engine i'm sure it has lower efficiency than your car's engine in spite of your low load). ITs a total factor of about 1.74 only with the energy content in fuel.
Edison2 - Welcome claims a mass of 450 kg and a cd of 0.15.
2 L of diesel /100kms aprox 3.48 E85 L/100km, if i'm not wrong.

[HypermilerAX]

Does that take into account BSFC variations? If yes, how?

[pgfpro]

Very nice work!!! Love that car!!!

[ausias]

Originally Posted by HypermilerAX

Does that take into account BSFC variations? If yes, how?

using a bsfc semiempirical mathematical model with 20 parameters and variables.
and the fuel consumption has the main variables and parameters in use in a code of some hundreds lines, i have not counted them, i'm sorry.
Attached you will find a graph comparing the fuel consumption between standard Lupo 3L and the estimation of what is happening on the Lupo 2L project and also the efficiency from 0 to 1 (i'm not using g/KWh because US and UK use other units that i found difficult to understand because i'm not used to them, and i want keep it simple for everybody.

[Vekke]

Secondary objective completed:

http://www.youtube.com/watch?v=bVXMx...ature=youtu.be

[HypermilerAX]

Wow. My AX needs 36 seconds for 80-120 in 5th gear.