Hello everyone,This is more of a doubt than an idea because I'm not very learned or experienced in this topic.
In making modern 2 strokes,we have Fuel Injection,Sump-based Lubrication,Oil Injection.etc
Is it possible to completely eliminate primary compression in a 2 stroke ?
"Direct Compression Fuel Injected 2 Stroke Engine" :
My idea is to have a 2 stroke engine,head with a Fuel Injector and Spark plug,but the crankcase similar to 4 stroke,probably immersed in oil (better lubrication than premix coming there).Fuel isn't mixed with Oil and they don't get to the crankcase.You have a traditional intake with an air filter,Reed Valve going directly to the combustion chamber.So yeah,the thing goes like this :
1) Piston starts moving down from TDC,creating suction,pulls in fresh air inside the combustion chamber
2) Piston starts to compress,air starts to swirl,Fuel Injector fires JUST after the piston closes both the intake and exhaust ports (that's when compression actually happens) so the swirling air mixes with fuel easily and is fully detonated by the Spark plug,completely eliminating blowby or escape of unburnt fuel.Blowby still happens but that's just air,which is available plenty and is free of cost and not with Fuel,which isn't.
3) Piston starts to go down due to combustion,opening both the ports,The exhaust is pulled out to the exhaust port by the piston's downward movement,while fresh air is also entering the combustion chamber, 'pushing' out the exhaust gasses.
And the cycle goes on and on.
I feel that this fixes some problems of 2 strokes like complicated crankcase design,air fuel blowby,weak lubrication,Emissions,Efficiency.etc.But it brings its own problems like complexity of Fuel Injector,increases costs and weight.etc but I feel the advantages far outweigh the disadvantages.
Combine that with Modern Catalytic Converter,I think 2 strokes can be just as efficient,clean,still simpler,lighter,easier to build (and rebuild) than a modern 4 stroke.
What do you guys think ? Please comment your thoughts below!
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