Some related posts from others lists;
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I found a user forum about electric, natural gas ,etc.
cars :
http://www.calstart.com/forum/index.html
See the "zero-pollution car" messages. They are also
searching for more information about the engine.
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Negres official website (with car pictures);
http://zeropollution.com/zeropollution/index.html
==============
http://zeropollution.com/zeropollution/zero_emissions.html
==============
http://zeropollution.com/zeropollution/no_fuel.html
The car of the future works on compressed air . The
only by-product is the air that goes into it. Apart
from minimal electricity needed to charge the engine
up, it is practically emission-free.
Cars with MDI engine can store enough air for 125
miles' driving, or, in city, about 10 hours. It
carries three tanks which hold a total of about 300
litres of air. The tanks can be filled within two
minutes with an air pump. Also in the car is a small
compresor which can charge the tanks within four hours
linked to the electricity supply at home.
The versatility of the MDI engine, is that it can be
adapted for transport which needs higher speeds over
longer distances, because it can also run on petrol.
At speeds over 50 mph, the engine switches
automatically to petrol supply and emits far lower of
CO2 and NOx than a normal car.
When running on petrol, the small combustion chamber
allows the fuel to burn almost four times as long as
in a conventional cylinder, thus increasing efficiency
and reducing emissions.
However, MDI vehicle is design to run exclusively on
air compressed. A jet of cold air is delivered at
hight pressure into de combustion chamber which is
already charged up with hot compressed air. This
provides enough force to run the engine.
Weighing 34Kg, the 770 cc engine is one-third the
weight of a normal AX engine and the total weight of
the car is just about 1650 lb by using carbon-fibre
for the shell.
==============
--- LARRY SULLIVAN wrote:
> Hi Ted et all:
> If one reads the document carefully it discribes
> the engines as
> "compressed air assisted" runing on purly compressed
> air is theory. To
> me the jest is a fuel effiecent gas engine via
> compressed air injection.
> Using the momentum of braking to power the
> compressor is novel but can
> be utilized, this is essentually a "air brake".
> Using compressed air in
> the compustion chamber would certainly give more
> power but using cold
> compressed air into a hot chamber(as in the purely
> compressed air mode)
> would only cancell each other out. Running a car on
> purely compressed
> air from strorge tanks is simply not practical
> because one simply could
> not compress enough volume into the tank.
> I hate to brake some peoples bubble but I believe
> I saw the pictures
> of the car in a promo for a electric fuel cell car.
> So I shall state again this is simply a stock promo
> job, "a fool and
> his money is soon parted".
>
> Larry
>
=============================================================================
> >
> > The Economist. Oct 26, 1996
> > Car engines - Not all hot air
> >
> > THERE is something silly about the four-stroke
> petrol engine.
> > Although it is the workhorse of almost all
> passenger vehicles it
> > suffers from some glaring inefficiencies. Only one
> of the four
> > strokes of the piston provides power to thecar
> while during
> > part of another stroke the piston is moving
> against the pressure
> > of the ignited fuel. All of this is an extravagant
> waste of energy.
> >
> > Such compromises are necessary because of an
> oddity in the
> > engine's design-namely that the initial
> compression of the
> > combustible gas its ignition by the spark plug and
> the
> > power-producing expansion that follows all occur
> in one and
> > the same place at the top of the same cylinder.
> Over the years
> > alternative designs have been proposed that ease
> this
> > constraint. Guy Negre an engineer in Brignoles in
> France
> > whose background is in Formula One engine
> designthinks he
> > has hit on a particularly ingenious variant which
> can run far
> > more efficiently and cleanly than a four-stroke
> engine on the
> > same amount of petrol. As a bonus and without any
> > modification the engine can also be made to run on
> nothing
> > more than compressed air.
> >
> > At the heart of Mr Negre's engine is a small
> combustion
> > chamber. A piston in a compression cylinder
> outside this
> > chamber forces air through a valve into it
> compressing and thus
> > heating a mixture of air and petrol in the
> process. With all
> > valves to the chamber closed the hot mixture is
> ignited. The
> > design of the engine allows the fuel to burn over
> a period up to
> > four times longer than in a four-stroke engine.
> The longer burn
> > time means that the fuel is consumed far more
> completely
> > leading to less in the way of unwanted by-products
> such as
> > carbon monoxide and nitrogen oxides.
<snip>
===
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Please respond to jdecker@keelynet.com
as I am writing from my work email of
jwdatwork@yahoo.com.........thanks!
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