«

»

Image

Combustion and how it happens

 So lets look at petrol engines which use a spark

to ignite a mixture of fuel vapour and air

Put our selves inside the combustion chamber—-there is this mixture in the air and in the corner is a spark plug.

The air around you is compressed as the piston rises under your feet at some point it stops and is ready to go down

You look across at the spark plug and a little flame appears which spreads all around you and most of the gas gets on fire as the piston below you feet is driven down

Not all of the fuel air mixture ignites and what does ignite occurs in quite along time

The flame has to travel around the chamber.

This is not efficient combustion approx 25% lost energy

 

Similarly when we look at diesel engine

Put our selves inside the combustion chamber—-there is air only and in the corner is a fuel  injector.

The air around you is compressed as the piston rises under your feet at some point it stops and is ready to go down

You look across at the injector and a fine spray of fuel appears which as it enters ignites because the pressure inside is so great that it combusts and  a flames spreads all around you and most of the gas gets on fire as the piston below you feet is driven down

This is not efficient combustion either approx 10% lost energy

It is obvious that combustion has to be improved

It has been found that

Put our selves inside the combustion chamber—-there is air and finely atomised fuel mixture.

The mixture around you is compressed as the piston rises under your feet at some point it reaches that pressure at which the mixture –the WHOLE MIXTURE  — will ignite due to compression.

You look across and every little molecule of mixture is ignited simultaneously and

combusts and  a flames have happened in every corner at once

this is complete combustion but did you notice that the piston below your feet is still on its way up, and the ignition is actually occurred on the way up ===

==NO GOOD==

This, the problem here is today’s inventors problem to time this combustion to occur as the piston comes to the top and then to make it happen if the fuel has a slight change in quality or climatic conditions..

this combustion is called HCCI Homogeneous Charge Compression Ignition

 

Engineers have spent many years trying for this goal!!

  • If HCCI were adopted in all the shipping in the world where combustion was more efficient and pollution far less and shipping costs reduced
  • Similarly trucking using HCCI would be more efficient and pollution far less and shipping costs reduced.
  • HCCI has another advantage in that many different fuels can be used in one engine.
  • This means defence of the country means any fuel found in the field during war can be used.
  • It means the poor countries farmers etc could grow there own fuel.
  • It means that the car industry as we now it can be saved.
  • It may mean that generation of electricity using piston engines may be a proposition.
  • It means that airborne illness could be reduced in the world.

 

Many global car companies are trying to achieve HCCI

GOOD NEWS

There is one company which has solved this 100%— the ignition occurring at the top of he stroke for every stroke

Varitech pty ltd

Leave a Reply