Re: Plot of Engine Speed vs. Fuel Consumption

On Tue, 15 Apr 2008 04:06:26 -0700 (PDT), ACAR
<dimndsonmywndshld@[EMAIL PROTECTED]
> wrote:

>On Apr 12, 4:49 pm, ecarecar <ecare...@[EMAIL PROTECTED]
> wrote:
>> I am looking for a plot of engine speed vs. fuel consumption.  Is one
>> available anywhere?  I am not at all picky about what specific engine.
>
>I suspect Universities that compete in building very fuel efficient
>vehicles (esp. hybrids) would have this information available to the
>public.
>
>Marine applications may be a source, too.
>
>Maybe Briggs & Stratton has that info. for their lawn mower engines.
>

Here is a plot of Brake Specific Fuel Consumption vs. rpm for a VW TDI
engine.  

http://forums.tdiclub.com/showthread.php?t=208125

BSFC is the measure of how much fuel is being consumed per unit power
generated - a true fuel efficiency measurement.  To get an absolute
fuel consumption rate, you could multiply the BSFC by power at a given
rpm.  Of course this all assumes wide open throttle.  If you are
running at a lower power setting, the absolute fuel consumption will
be lower.  I would guess that BSFC might be higher or lower depending
on the way the engine is set up.


Maybe the OP could tell us exactly what he wants to know.