Gordon McGrew wrote:
>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?
>
>
>
I don't know which chart you mean. Not all the cars in the top chart at
www.greencarcongress.com/2006/05/fuel_consumptio.html
are diesel.
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