Does it have a sensor to count the number of single digit OM's it is
carrying??? :-)))
Rich
----- Original Message -----
From: "Joe Gwinn" <joegwinn@xxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Saturday, February 08, 2003 2:16 PM
Subject: RE: [OM] [OT] No more big SUV (fuel and air mass-flow meters)
> At 11:03 PM +0000 2/7/03, olympus-digest wrote:
> >Date: Sat, 8 Feb 2003 08:05:46 +1300
> >From: "Brian Swale" <bj@xxxxxxxxxxxxxxx>
> >Subject: RE: [OM] [OT] No more big SUV (going green, sort of)
> >
> >[snip]
> >If your motor has fuel injection, it also probably measures it in volume;
cold
> >fuel - more calorific value per stroke, hot weather, less. Don't know how
> >carburettors would be affected. Probably the same.
>
> Modern fuel injection engines measure temperatures and flows, compute (or
measure) air mass-flow and fuel mass-flow (compensated for temperature).
Some cars measure mass flow directly, using a hot-wire flowmeter (the
greater the mass flow, the greater the electric power needed to keep the
wire temperature at the target value), some infer mass flow from volume flow
and temperature. This complexity is a result of the laws requiring low
pollution from automobiles, despite no maintenance for 50,000 miles. A
tightly-controlled engine generates less unburned hydrocarbons et al for the
catalytic converter to handle.
>
> OM Content: My Volvo-brand camera transporter likes single-digit OMs
best, and measures airfolw with a hot-wire anometer. The wire is made of
platinium. Don't know how the fuel flow is measured.
>
> Joe Gwinn
>
>
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