Newbie- New Rotary ICE "DM^2" for short

[Moura]

Not just look, I would like to see your opinion.
Please do not change to Wankel discussion; this is DMM, not Wankel.
All opinions are welcome.

Yes, I made my own CNC Milling machine more than six years ago, two CNC Foam Cutter, Coil wind machine, and some more things, computer and microprocessor controlled.

Also had made my linear slider design, because the ones available in the market do not offer the features I was looking for.

Everybody, please take this as an introduction of myself.





Thanks.

[BillTodd]

Interesting.

There seems to be a small amount of combusted gas still present after the exhaust cycle. Could you not optimise the combustion chamber/exhaust port position to improve this?

[Moura]

BillTodd.

You are right, a very small amount of burned mixture is not getting out from the chamber, as shown in the animation, but in a real working engine, with the exhaust pipe, it will be even less gasses left in the chamber.
As you say. It is possible to improve it, using one secondary valve or using a tuned exhaust pipe.
The tuned exhaust is my preferred, because it gives a good improvement as when it is used in two strokes piston engines, in the DMM it will do some good work also, and is very simple to implement.
You have to take in consideration that animation is only to show the basic idea of the engine design; some omitted features make the main idea easier be visualized.
You got direct to one of the points witch, must have some tweaking and tests.
The valves position may need a better positioning, in order to take more efficiency out from the engine, the test will show the better way.
Thank you, I really appreciated you reply.

[Moura]

Here is some DMM, key features:
Two spark plugs per chamber, for more even combustion.
The Spark Plugs and Valves are the very hot spot on all engines design, DMM spark plugs are hidden from the mixture except at the right time to ignite, this prevent pre-ignition and knocking.
Balancing is not required, if using two rotors.
One combustion per turn using one rotor, no axial vibration if using two rotors in this case two combustion per turn.
Have all four cycles, intake, compression, combustion and exhaustion, same as four strokes engine, it will sound the same also.
Can be designed to drive a propeller "very low rpm" or ducted fan "very high RPM" in the case of aviation use and never need reduction gears.
That is not all folks.

[BillTodd]

Is this animation correct (timing wise) ?

Sorry about the speed (I had to keep the number of frames down to meet the attachment limit)

[Moura]

Not bad! The timing is fine, if you are talking about synchronism of valves and
rotor.
I call this design DMM/MM “De Moura Motor/Mickey Mouse.”
I did have this option, just for myself, as one alternative, between some others; now I have one feature that cannot be used for utility patent, no more, any way no hard feelings BillTodd.
As I can see, you like DMM and get it very fast, also have good CAD animation skills, whot a smart guy.
Look at www.meditronica.com disregard some English errors please.
To know little bit more about the engine and me.
I have many other features that can be used for patent protected design.

[BillTodd]

This ones little less 'mickey mouse' (valves lowered)

[dynosor]

Originally Posted by BillTodd This ones little less 'mickey mouse' (valves lowered)

I see you also reduced the width of the ports so that the pivoting seals would not catch and "trip" over the port edges. I was poised to suggest the seals need to be longer in the rotation direction to better bridge the ports, but your solution is better.

The counter argument is that port area has been reduced.

[Moura]

Originally posted by Dynosor

Originally Posted by BillTodd
This ones little less 'mickey mouse' (valves lowered)


I see you also reduced the width of the ports so that the pivoting seals would not catch and "trip" over the port edges. I was poised to suggest the seals need to be longer in the rotation direction to better bridge the ports, but your solution is better.

The counter argument is that port area has been reduced.
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Dear Dynosor, welcome to our tread.
Bill made again a very good work, as expected.
The port size can be compensated in other way; actually, the size will be more than five times bigger than normal piston engines are;
This will be possible because the engine thickness, imagine Bill's design tree to four times thicker; of course, the port will be bigger also, if the engine diameter is not changed; the engine port will be much bigger, relative to its displacement.

[Moura]

Hi, Bill.
Great work!

Moura

[dynosor]

Originally Posted by Moura the port will be bigger also, if the engine diameter is not changed; the engine port will be much bigger, relative to its displacement.

And there is no valve sitting in the port to partially block off the flow.

[BillTodd]

Originally Posted by dynosor I see you also reduced the width of the ports so that the pivoting seals would not catch and "trip" over the port edges. I was poised to suggest the seals need to be longer in the rotation direction to better bridge the ports, but your solution is better. The counter argument is that port area has been reduced.

I make the animations principally to show the unique mechanisms involved, they're not really supposed to be practical designs. If I'm given, or can glean from patents, some dimensions, then it helps a lot.

Only occasionally do I see a set of plans:
http://www.dself.dsl.pipex.com/MUSEU...ryengmodel.htm