On Wed, 16 Apr 2008 17:46:40 -0400, ecarecar <ecarecar@[EMAIL PROTECTED]
>
wrote:
>
>
>Gordon McGrew wrote:
>
>>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.
>>
>>
>>
>This is WOT? Therefore, it is also full throttle ignition advance?
>The bottom of the curve is quite narrow.
Well actually it is a diesel so there is no throttle (my bad) and no
ignition. What I should have said is that I assume this curve is for
maximum power setting.
Again, it is not clear exactly what you are trying to show/learn here.
For example, are you interested in fuel consumption at various engine
speeds or car speeds?
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