New Rotary Engine

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SagaLore

SagaLore

Elite Member
Dec 18, 2001
24,036
21
81
I have been fascinated with rotary engines since high school, and besides my tweaks to the original wankel design, I'm always looking for news way to accomplish rotary.

I came up with a piston based rotary - approximately 8 or 12 long and narrow pistons, or "pipes". The pipes are hinged onto a disc, and change angle during the stroke within the housing which is positioned about 30 to 45 degrees off the main disc. This "differential" is what converts the combustion stroke into power. I haven't worked out how I'm going to get air/fuel into the chambers, or how to accomplish an otto cycle instead of two-stroke.

Here is my rough sketch:

Pipe Diffusion Engine

It would be nice to have a real 3D animated model of this to see it in action.
 
C

cmdrmoocow

Golden Member
Jul 22, 2004
1,503
0
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Interesting.... I suppose it could work, but thats a lot of one-sided weight to the engine, and a lot of vibration. The fuel and spark plugs/wired would be flexed to death, but then of course, the whole thing spins, so wires are out.
 
O

Ornery

Lifer
Oct 9, 1999
20,022
17
81
I don't know if you're being serious or not, but I'l humor you. What exactly will cause the turning of either end? :confused:
 
L

LordMorpheus

Diamond Member
Aug 14, 2002
6,871
1
0
Originally posted by: Ornery
I don't know if you're being serious or not, but I'l humor you. What exactly will cause the turning of either end? :confused:
Click to expand...

I see his idea, it the pistons would turn both sections.

It would be tough. If i have time maybe I'll try to draw it in inventor when I get back to school.
 
I

Ikonomi

Diamond Member
Dec 19, 2003
6,056
1
0
Originally posted by: Brutuskend
Did you know Wankel never possessed a driver's license in his life.
Click to expand...

Well, there are enough wankers on the road now to make up for it.

Oh wait.
 
SagaLore

SagaLore

Elite Member
Dec 18, 2001
24,036
21
81
Originally posted by: LordMorpheus
I see his idea, it the pistons would turn both sections.

It would be tough. If i have time maybe I'll try to draw it in inventor when I get back to school.
Click to expand...

Cool, thanks! :D

The disc and rotor would be geared where they almost meet, keeping the turn synchronized on both ends. The rotor (large trapezoidal cone part) would stay at that angle. The engine would have little to none vibration.
 
MetalMat

MetalMat

Diamond Member
Jun 14, 2004
9,687
36
91
I dont know, this might work but has alot more that can go wrong than a wankle engine......
 
O

Ornery

Lifer
Oct 9, 1999
20,022
17
81
I'm not seeing how the piston traveling down, would be cause for the assembly to rotate. I can see how the rotating assembly would cause the pistons to travel up and down the cylinders, but not the other way around. It would be like trying to spin a worm gear by turning the driven gear.
 
Evadman

Evadman

Administrator Emeritus<br>Elite Member
Feb 18, 2001
30,990
5
81
You have your rotation of the "head" backwards. The way it is now would snap the connectiong rods. The "Head" and output must both turn the same way, unless I am missing something.
 
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crypticlogin

Diamond Member
Feb 6, 2001
4,047
0
0
I'm all for innovation and new ideas, but wasn't one of the advantages of a rotary being it had comparatively fewer moving parts?

:)
 
Evadman

Evadman

Administrator Emeritus<br>Elite Member
Feb 18, 2001
30,990
5
81
Originally posted by: tenchim
I'm all for innovation and new ideas, but wasn't one of the advantages of a rotary being it had comparatively fewer moving parts?

:)
Click to expand...

AS you said, that's one of them. The major one being the RPM ceiling is higher, since there is little recriprocating mass, all is rotating.
 
V

Viper GTS

Lifer
Oct 13, 1999
38,107
433
136
All other issues aside, how do you plan to cool this thing?

With no block + cooling system to dissipate heat into those pipes are going to get damn hot.

Viper GTS
 
Evadman

Evadman

Administrator Emeritus<br>Elite Member
Feb 18, 2001
30,990
5
81
Originally posted by: Viper GTS
All other issues aside, how do you plan to cool this thing?

With no block + cooling system to dissipate heat into those pipes are going to get damn hot.

Viper GTS
Click to expand...

Ceramic block? That would be most efficient at keeping the heat in the cyl where it should be.
 
OrganizedChaos

OrganizedChaos

Diamond Member
Apr 21, 2002
4,524
0
0
Originally posted by: SagaLore
I have been fascinated with rotary engines since high school, and besides my tweaks to the original wankel design, I'm always looking for news way to accomplish rotary.

I came up with a piston based rotary - approximately 8 or 12 long and narrow pistons, or "pipes". The pipes are hinged onto a disc, and change angle during the stroke within the housing which is positioned about 30 to 45 degrees off the main disc. This "differential" is what converts the combustion stroke into power. I haven't worked out how I'm going to get air/fuel into the chambers, or how to accomplish an otto cycle instead of two-stroke.

Here is my rough sketch:

Pipe Diffusion Engine

It would be nice to have a real 3D animated model of this to see it in action.
Click to expand...

make it a 2 stroke turbo diesel
 
H

Howard

Lifer
Oct 14, 1999
47,982
11
81
Originally posted by: Evadman
Originally posted by: Viper GTS
All other issues aside, how do you plan to cool this thing?

With no block + cooling system to dissipate heat into those pipes are going to get damn hot.

Viper GTS
Click to expand...

Ceramic block? That would be most efficient at keeping the heat in the cyl where it should be.
Click to expand...
Assuming that thermal shock and the high temperature can be handled (they can, but I have no idea how hot a low-conductivity block can get without water cooling), what happens when the valves get too hot? The pistons? At what temperature does the oil break down?
 
ElFenix

ElFenix

Elite Member
Super Moderator
Mar 20, 2000
102,402
8,574
126
ah i get it, the whole thing rotates together at the same rate, but because one ring is at an angle to another you get power just after the top part and exhaust near the bottom

like this

it wouldn't need valves just ports
 
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