The BSFC chart thread (post 'em if you got 'em)

[Piwoslaw]

is there a bsfc chart out there ? (1.8t) - VWVortex.com

[Piwoslaw]

1.9 TDI ALH 90hp:

From:
Zużycie paliwa - odwieczny temat sporów. (click here for Google translation)

That blog has some really nice info, in fact it's probably the most comprehensive source of automotive info I've seen on the Polish Web recently. It gives a link to a German book with a few charts (Ottomotoren mit Direkteinspritzung: Verfahren, Systeme, Entwicklung, Potenzial, pp. 198-201), which are OK except that they don't have power curves.

However, those charts do not have the power curves. They can be drawn using other values, the mean useful pressure and speed.
For engine power based on useful medium pressure, we use the formula *:
N = V * p * n/120
N - Power
V - engine displacement
p - the average usable pressure (bmep)
n - rotational speed

For example, 12 bar at 2000 r / min for the 1.9 TDI.
We must replace those units with SI:
1.9 l = 1.9 * 10 ^ (-3) m ^ 3
12 bar = 12 * 10 ^ 5 Pa

1.9 * 10 ^ (-3) [m ^ 3] * 12 * 10 ^ 5 [Pa] * 2000 [r / min] / 120 = 38 000 [W] = 38 [kW] / 0.7355 [hp / kW] = 51 [HP]

* For two-cycle engine: N = V * p * n/60

One of the comments also links to four charts:

• http://s3.amazonaws.com/mark_trancha.../m271-bsfc.jpg - Mercedes 1.8 mit Kompressor (dead link)
• http://web.mit.edu/deweck/www/PDF_ar...-2004-4553.pdf - Saturn 1.9 (already known)
• http://www.v6performance.net/gallery...0805_Fig11.gif - Toyota 3.0 V6 (Camry)
  
• http://www.techno-fandom.org/~hobbit...0/SAE-bsfc.gif - Prius
  

[Piwoslaw]

This one appears to for the Peugeot/Citroën 1.9 diesel:


This I have no idea:

Both found here: recherche de rendement - oliomobile.org

You're free to decipher the details, since my French is only as good as Google's translation to English

[Piwoslaw]

I found the following on a Porsche forum. They are torque/power charts for the 2.2(E and S) engine, with fuel consumption for 2.0 and 2.4 added. First the 2.4E, 2.2E, and 2.0E:


and the 2.4S and 2.2S:


Not exactly the best charts for BSFC, but better than nothing. Not too many Porsches in our garage, anyway...

Originally Posted by RH77

I've searched for a while and haven't found anything close to a BSFC chart for a Honda non-VTEC engine. A recent Autospeed article had a good one for the Insight, but it's a radically different engine and VTEC-equipped.

If anyone comes across one, I would appreciate it. Thanks

Here is that AutoSpeed article:
AutoSpeed - Brake Specific Fuel Consumption

[Billy_BAD_Boy]

Found this in a french site for peugeot-citroen engines.

Piwoslaw have you seen that? DV6C

[Piwoslaw]

Originally Posted by Billy_BAD_Boy

Found this in a french site for peugeot-citroen engines.

Piwoslaw have you seen that? DV6C

Thanks
That's a much newer version of my (and Euromodder's) engine, but it's still very helpful
I noticed in the graph for the DV6C that the lowest fuel comsumption per kWh is at much higher rpm than max torque (~2200 vs 1750). In fact, @1750rpm it's 10% higher.

OK, I looked around and found the data for the DV6D (same engine, less power) and its lowest consumption is close to max torque (~1850 vs 1750), BUT that fuel consumption is overall higher than in the more powerful DV6C. The Peugeot 207 99g (Economique) also has the less powerful version of this engine, though it's been tuned to get much lower FC.

I also took a look at the 1.4 DV4C and its lowest fuel consumption is even worse than the DV6D's, and at even higher rpms - 2500 Naw, a turbodiesel shouldn't go there too often...

[Billy_BAD_Boy]

In fact DV4C is based on the older DV4 which is only second generation common-rail system with magnetic injectors that operates only with 1500 bars pressure. The lower displacement, no VTG turbo and no IC is another reason why this motor has so "bad" fuel consumption per KWh ... However I do think that even that at lower rpm below 2000 the real life consumption will be much better than if you are driving it with 2600. And that's because if you are with 2600 at 5th gear the speed will be well over 120 km/h and the aero penalties will be untolerable.

And look the newer generation of 3 litres diesel engines ....they only menaged the fuel consumption per KWh of a 15 year old TDI PD engine

[ontherun]

Hi all,
I found a BSFC map of the gasoline engine form the Opel Ampera/Chevrolet Volt. Its a 1398ccm four cylinder(bore 73,4mm, stroke 82,6mm, compresion ratio 10,5).
The power output is 63kW/4800rpm, 130Nm/4250rpm. It comes from GM family 0, generation 3 engines.

The maps show BSFC + generator efficiency and lines of GM strategy for battery charging. The engine is used as a range extender for the EV.

[Daox]

Nice find ontherun.

The map looks pretty peaky, unlike other fuel efficient maps which have a broader peak area.

[ontherun]

Its important to take into account the efficiency of the generator. From the numbers it can be seen that it is driven directly w/o any gears. A map of engine+generator efficiency would be more interesting