Quote:
Originally Posted by ProDarwin
A) Super high compression. Like 15:1 or greater in the second cylinder. And different comp. ratios for compression stroke and power stroke (like atkinson)
B) Firing ATDC (don't have to compress during combustion)
C) The potential of an Air-hybrid. You can actually store the energy created under compression braking into a large tank (and feed it back into cyl #2 at a later time).
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I don't see where 25 percent more efficiency is going to come from.
a. you can run 15:1 in a traditional engine. same problems, same solutions. variable cam timing is a pretty known technology on an Otto engine, which gives pseudo atkinson already.
b. This one is REALLY weak. you can fire ATDC on an Otto. But in any case, your mean average cylinder pressures will be lower, and mileage will suffer. There is spark advance for a reason.
c. Even weaker. You can do an air hybrid using the main pistons, and you can do an air hybrid with an Otto engine. In either case all you have to is completely change the cam timing - not a trivial matter.
This new revolutionary engine looks a whole lot like a Detroit 2 stroke diesel to me.