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Old 03-18-2025, 04:54 AM   #9 (permalink)
Logic
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Quote:
Originally Posted by paniwew View Post
That engine design is seriously impressive—low maintenance, direct injection, and the ability to run inverted without oil issues? Sounds like a perfect setup for aviation or even military applications. The redundancy of a pump and injector per cylinder also makes it incredibly reliable. Would love to see how this performs in real-world testing.
2-stroke diesels (direct injection) that use a turbo or supercharger instead of crankcase induction have been around and in use for years.
Detroit Diesel and MAN for a start.

You gain; cleaner burn as, like a 4-stroke, there is no oil being burned, using off the shelf parts.
You lose on; weight and size because of the added turbo/super charger.

But you can build a double acting piston engine with a 2nd combustion chamber below the piston!
A 1-stroke engine!
(Taller and oil reqd again. )

On the other hand; apparently the amount of lubrication oil required for crankcase induction/lubrication is dramatically less when there's no fuel also mixed in, so it's possible one might skip the extra weight and complexity of the added charger. with direct (fuel only) injection

Have you seen the clean, constant rpm 2-stroke (for Series Hybrid) thread?
That's light, obtainable, cheap, and easy!
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