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'[OT}Re: Instantaneous Fuel Consuption Measurement'
1998\06\25@194647 by TONY NIXON 54964

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>Fill the tank, zero the counter, drive for a while (the longer the
>better) refill the tank, and enter the fuel quantity used to refill.

>During this process, we've been counting injector pulses, so we now
>know that there are X pulses per gallon. (liter or whatever)

How does that work, when the injector pulse widths vary with engine
load etc.

Tony


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1998\06\25@210454 by David VanHorn

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>>Fill the tank, zero the counter, drive for a while (the longer the
>>better) refill the tank, and enter the fuel quantity used to refill.
>
>>During this process, we've been counting injector pulses, so we now
>>know that there are X pulses per gallon. (liter or whatever)
>
>How does that work, when the injector pulse widths vary with engine
>load etc.


Worked pretty well on several car computers I've owned. Obviously it's
averaging.. Mind, they were not trying to control the engine, just to
monitor consumption and performance.

I suppose one could collect min and max widths and average, or even
get more sophisticated about it.

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