Has anybody yet questioned the accuracy of mileage measurement yet? If so
how do they compensate for different tyre makes, tread pattern, wear,
pressure, temperature, differential effects and, of course reversing.
Faulty air mass-flow meter = no turbos.... I speak with experience here...
Also my Audi computer has been know to give, on a 60 mile return trip, an
average fuel consumption in single digit miles per imperial gallon... proven
by the fact that I started with a full tank and ended with a virtually empty
tank :-( At this burn rate and UK fuel at 6 or 7 USD a gallon I don't need
all these fancy calculations anyway - my bank manager does it all for me :-(
Just a thought.
Ian
-----Original Message-----
From: owner-olympus@xxxxxxxxxxxxxxx
[mailto:owner-olympus@xxxxxxxxxxxxxxx]On Behalf Of siddiq
Sent: 09 February 2003 22:08
To: olympus@xxxxxxxxxxxxxxx
Subject: Re: RE: [OM] [OT] No more big SUV (fuel and air mass-flow
meters)
2/9/2003 1:45:19 PM, Joe Gwinn <joegwinn@xxxxxxxxx> wrote:
>>i'd think by measuring injector pulse length, as mentioned before. somehow
i doubt an inline-flow measuring device can be accurate
>>enough, easier to measure to how long injectors are open since they put
out a set volume multiply by length pulsed.
>
>Sounds plausible, although one would also need to compensate for variations
in fuel viscosity with temperature, a matter of table
look-up.
i'm thinking fuel temp would be fairly stable once it reaches the engime
compartment. for starters it get pressurized before it gets
sent, so that should stabilize cold tank temps, then in the engine itself,
shortly before it hits the injectors, the metal tubing has
plenty of time to absorb ambient heat.
/S
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