Gas and liquid contact apparatus – Fluid distribution – Pumping
Patent
1996-10-25
1998-06-09
Miles, Tim R.
Gas and liquid contact apparatus
Fluid distribution
Pumping
261 644, 261 59, 261 96, 261DIG21, F02M 9133
Patent
active
057628327
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT/AU95/00239 Apr. 21, 1995.
FIELD OF THE INVENTION
The present invention relates to an IC engine fuel supply system having a vapourising/pollution reducing carburettor particularly, although not exclusively, envisaged for use in the supply of liquid fuels into internal combustion (IC) engines in a vaporized form for reducing the quality of liquid fuel required for a given amount of energy output from the IC engine and for reducing the quantity of pollution produced by the IC engine in producing that energy.
BACKGROUND OF THE INVENTION
In the field of IC engines is it known to use carburettors to meter liquid fuel into the IC engine for combustion in a combustion chamber. The carburettor causes a mixing of the liquid fuel with air for said combustion.
Prior art carburettors have focussed on the issue of the nature of the mixture of the liquid fuel with the air, for example as shown in U.S. Pat. Nos. 1,358,876 (Richardson), 1,387,420 (Lombard) and 1,464,333 (Pembroke).
The actual explosion of the fuel/air mixture in the combustion chamber does not occur until the fuel vaporises. This vapourisation is achieved by the residual heat of the combustion chamber and the pressure of the compression stroke of the piston in the cylinder of the engine corresponding to the combustion chamber. As a result of this there is a delay between ignition of the fuel/air mixture and actual explosion to drive the piston down in the cylinder. Accordingly, the ignition of the fuel/air mixture must be initiated before the compression stroke of the piston is complete. Typically, the ignition occurs at between 6.degree. to 10.degree. before the piston reaches "top dead centre" (which signifies completion of the compression stroke). During the time after ignition and prior to explosion the liquid fuel is gradually vapourised as a flame front from a spark plug travels through the combustion chamber. When sufficient of the liquid fuel has vapourised the fuel/air mixture reaches an accelerated rate of combustion known as an explosion. The timing of the ignition is set so that the explosion occurs when the piston has reached top dead centre and hence maximum down force is imparted to the piston and hence is applied to the motive force of the IC engine.
However, a disadvantage of this is that some of the fuel in the combustion chamber remains in a liquid state even through the explosion and is subsequently exhausted to the atmosphere. This leads to a reduction in the efficiency of the use of the fuel and an increase in the pollution created by the IC engine.
The efficiency of the use of the fuel can be increased by vapourising the fuel before it enters into the combustion chamber. Then all of the vapourised fuel can be exploded and be applied to the motive force of the IC engine. Also, as a consequence of the more complete burn there is less pollution produced.
Attempts have been made in the past to vaporise the fuel prior to its entry into the carburettor by heating the fuel with heated gases from the IC engine exhaust, as exemplified by POGUE in U.S. Pat. No. 2,026,798. A disadvantage of these types of systems is that they are relatively complex, and difficult and expensive to manufacture.
My invention concerns how to achieve vapourisation prior to introduction into the combustion chamber without the use of heat.
SUMMARY OF THE INVENTION
Therefore it is an object of the present invention to provide an IC engine fuel supply system having a vapourising/pollution reducing carburettor for vapourising fuel prior to its entry into the IC engine.
In accordance with one aspect of the present invention there is provided an IC engine fuel supply system having a vapourising/pollution reducing carburettor for an IC engine, the vapourising/pollution reducing carburettor comprising: the vapourisation chamber, and a mesh means associated with the mantle means such that the fuel must flow through the mesh means when leaving the mantle means; chamber for metering an amount of the fuel from a fuel supply to the mantle
REFERENCES:
patent: 1097039 (1914-05-01), Miller
patent: 1103178 (1914-07-01), Eiker
patent: 1324515 (1919-12-01), Otti
patent: 1358876 (1920-11-01), Richardson
patent: 1387420 (1921-08-01), Lombard
patent: 1464333 (1923-08-01), Pembroke
patent: 2026798 (1936-01-01), Pogue
patent: 2194540 (1940-03-01), Breeze
patent: 3336734 (1967-08-01), Schultz
patent: 3892547 (1975-07-01), Tucker
patent: 4123233 (1978-10-01), Mannino
patent: 4372275 (1983-02-01), Schmidt
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