6 stroke engine?
 

US engineer invents 6 stoke engine, using water injection:

http://www.autoweek.com/apps/pbcs.dl.../60222004/1024

Interesting but I doubt it'll ever make serious production.


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Surely, more complex is a bad thing when it comes to mechanics.

To a point. The most common engine is the 4 stroke not the simpler 2 stroke, remember

It doesn't help that the 2 stroke has been killed off by emission regulations.

Clean-burn 2-strokes are cleaner than 4-strokes of equivalent power output though...

Unfortunately the cost of the technology is pretty high and this is what is stopping it from being used. A 2 stroke will always produce more torque than an equivelant size 4 stroke but they are very peaky and more difficult to ride. More kicks per mile if that's what you like :thumbsup:

more info on clean burn 2 strokes Here

Torque, or power?

They are less efficient as well arent they?

Engines produce torque. Power is just a calculated figure based on torque x revs --- more revs = more power. As a 2 stroke has less moving parts (no bouncing valves) it can rev higher, so as well as more toruqe, it is easier to produce more power. A v twin produces less power than an IL4 cos although they produce an equivalent amount of torque (or the IL4 slightly less), the mass of the pistons is smaller on an IL4 so it can rev higher without breaking.

I thought i read somewhere that the most efficient engine ever made was a 2 stroke ( built for power boat racing )..........................