Physics of Direct Injection in Internal Combustion Engine

Hi,

This book has a very introductory description of direct injection in a diesel engine: Practical Diesel Engine Combustion Analysis by Bertrand Hsu. Advanced Engine Technology has some good chapters on both spark- and compression-ignited direct injection applications. Also check Direct Injection Systems for Spark-Ignition and Compression- Ignition Engines by Cornel Stan.

What type of engine are you developing?

The engine is best described in the US patent. 6,708,654; High efficiency engine with variable compression ratio and charge (VCRC engine). The injection problems are fairly unique. The injection pattern needs to be narrow (ca. 4 degrees), highly pulverized with only moderate penetration.

It sounds like a solid fuel burner with the term pulverised in there. Are you chasing Adiabatic expansion or is this modified by a secondary induction of compressed air later in the cycle to ensure full combustion or at least reduced exhaust emmisions.

"Combustion Science Principles and Practice" may be quite usefull. The Auther is J. C. Jones. Millennium Books is the publisher. ISBN 0 85574 969 5

Sounds Like a fun project. I have the opposite problem these days, trying to stop things burning no where near as much fun as a nice quick exothermic reaction.

Friend,

I thinks it is HIGHLY ATOMISED and Pulverised. You cannot pulverise a liquid

but atomise it. You pulverise a solid material. Correct me if I am wrong. I worked in repair of Fuel Injection systems for 6 years. I hope I am not wrong.

R. GANAPATHI RAO

INDIA.

Right, right, right

It was late when I wrote that. Perhaps I had pulverized too much wine the night before.

I seem to remember reading years ago how they driect injected pulverised coal into Combustion engines. It seems like they used them in ships. But I can't seem to find anything on that subject so maybe I'm remembering wrong. Does anyone know if this can be done? And if so could you use any combustible dust, like grain dust. If they did use coal how did they keep it suspended? I would think you could have a problem of the dust turning to paste/concrete if you have any kind of a lubrication leak. Kind of off subject but when you said pulverised it reminded me of what I had read about coal.