New engine types in your future - list

[kach22i]

The master list:

There have been several threads about new or different engines under development. I've picked these up from some hovercraft and automotive forums. Lots of different engines out there to say the least.

My favorite is the two stroke turbo Diesel, not as exotic though. Plans are to have them in aircraft soon.


http://auto.howstuffworks.com/diesel-two-stroke1.htm

The two-stroke diesel cycle goes like this:

1. When the piston is at the top of its travel, the cylinder contains a charge of highly compressed air. Diesel fuel is sprayed into the cylinder by the injector and immediately ignites because of the heat and pressure inside the cylinder. This is the same process described in How Diesel Engines Work.

2. The pressure created by the combustion of the fuel drives the piston downward. This is the power stroke.

3. As the piston nears the bottom of its stroke, all of the exhaust valves open. Exhaust gases rush out of the cylinder, relieving the pressure.

4. As the piston bottoms out, it uncovers the air intake ports. Pressurized air fills the cylinder, forcing out the remainder of the exhaust gases.

5. The exhaust valves close and the piston starts traveling back upward, re-covering the intake ports and compressing the fresh charge of air. This is the compression stroke.

6. As the piston nears the top of the cylinder, the cycle repeats with step 1.

Some more:

http://www.angellabsllc.com/

http://www.quasiturbine.com/

http://www.coatesengine.com/

http://www.archerengine.dabsol.co.uk/#concept

http://www.roundengine.com/

http://www.rotoblock.com/

http://www.autoweek.com/apps/pbcs.dll/arti.../THISWEEKSISSUE

What's the name of the one they are putting in Ultra-Lights in Australia?

[marshmat]

Some pretty neat stuff there.
The two-stroke diesel has been around for a while- container liners use them- but it would be pretty neat if one could be made light enough for other uses too.
Of the ones mentioned in the last post: Angel and Rotoblock seem to share a similar concept, as do Roundengine and Trice. Rotoblock and Roundengine are, I think, the more promising options here given the current state of the companies/inventors. These should both be high-torque engines suitable for a variety of uses. Coates doesn't bring anything radically new, but their valvetrain does seem somewhat smarter than the conventional type. The 'quasiturbine' is interesting, of course, but it will probably be prone to wear (even more so than early Wankels, due to the oscillation of its flexible rotor). It looks pretty versatile but I doubt it'd be any more efficient than the much simpler Wankel.
It's nice to see some real work going on towards alternatives to the conventional reciprocating engine. I think some of these technologies do hold promise if they are ever developed. They're still an interim solution, though, as we will soon have to transition to fully renewable technologies.

[FAST FRED]

If you want a 2 stroke diesel Dteroit has been making them since the mid 1930's.

While there light for their power output the air police are not impressed with the exhaust .

The big diesel boats get over 50% efficency from modern 2 strokes , but unless youre moving an oil tanker the size is an obsticle.

FAST FRED