Article View: sci.misc
Article #417Re: Economical driving
From: John Pantone
Date: Mon, 18 May 1987 19:34
Date: Mon, 18 May 1987 19:34
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In article <759@edge.UUCP>, doug@edge.UUCP (Doug Pardee) writes:
> But I have seen many references that the old "drive as if there was an
> egg between your foot and the gas pedal" method is an inefficient way to
> accelerate.
There are two very distinct "versions" of efficient, when applied to
acceleration in an automobile.
Version 1 - use minimum gasoline
Version 2 - use minimum time
Neither version can be solved, as a general rule, by holding the accelerator
in one position.
Automobile engines have a "best-gas-milage" rpm and a "best horsepower"
rpm. They can be, but usually are not, the same.
Maximizing either version requires modification of accelerator position
with reference to manifold pressure, vehicle speed and engine rpm. Automatic
transmissions are actually fairly good at this sort of thing (or can be
anyway). Perhaps the "drive like you have an egg between your foot and the
accelerator" arose because given no tach, or manifold pressure gauge, and an
automatic transmission at least this would let the trans. do most of the
decision work.
--
These opinions are solely mine and in no way reflect those of my employer.
John M. Pantone @ GE/Calma R&D, Data Management Group, San Diego
...{ucbvax|decvax}!sdcsvax!calmasd!jnp jnp@calmasd.GE.COM
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!esosun!ucsdhub!sdcsvax!sdcc6!calmasd!jnp From: jnp@calmasd.GE.COM (John Pantone) Newsgroups: sci.misc,rec.autos Subject: Re: Economical driving Message-ID: <2246@calmasd.GE.COM> Date: Mon, 18-May-87 15:34:30 EDT Article-I.D.: calmasd.2246 Posted: Mon May 18 15:34:30 1987 Date-Received: Wed, 20-May-87 04:45:14 EDT References: <397@its63b.ed.ac.uk> <759@edge.UUCP> Organization: G.E.- Calma R&D, San Diego, CA Lines: 29