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Author Topic: Engine efficient  (Read 3054 times)

Offline Feliks

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Engine efficient
« on: 02/04/2006 22:57:30 »
Please visit newbielink:http://www.new4stroke.com [nonactive].
This new engine have a better efficiency a lot?
:):)

                  Andrew
« Last Edit: 03/04/2006 03:16:16 by ukmicky »


 

Offline DoctorBeaver

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Re: Engine efficient
« Reply #1 on: 02/04/2006 23:18:16 »
That is a very interesting invention. It certainly enables greater compression than a standard piston engine.

I assume you have already patented it. If not, then do it NOW!

1 problem I can see is that there are more moving parts than with standard valves; but as the actual piston rarely goes wrong, I don't see that being too much of a problem.

Another potential problem would be with the upstroke of the piston that allows the mixture into the cylinder. That piston must start moving up after combustion which means some of the exhaust gases would go up that part of the cylinder rather than out the exhaust port. Quite what effect that would have, I'm not qualified to say.

I certainly wish you luck with your invention. Please keep us informed of what progress you make.

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Offline JimBob

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Re: Engine efficient
« Reply #2 on: 03/04/2006 00:30:43 »
This is very nice and intuatively much more efficent, as the fuel is under  greater compression when ignited. It one of those "why didn't I think of that?" inventions.


The mind is like a parachute. It works best when open.  -- A. Einstein
« Last Edit: 03/04/2006 00:36:53 by JimBob »
 

Offline ukmicky

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Re: Engine efficient
« Reply #3 on: 03/04/2006 03:15:40 »
Sorry Andrew it looks good but? cant see it working.
 
OK I'm not an expert however i have built and race tuned a number of engines in the past but its hard to see what your trying to achieve going by your animation.


A major design factor in regards to the efficiency of any engine is the shape of the combustion chamber and yours would give you nightmares in regards to obtaining a clean and efficient burn.

When you ignite your mixture and the gases start expanding all the energy is supposed to be directed downwards pushing down the piston connected to the crankshaft however you have got a little piston above moving upwards creating space for the gases to expand into and is another movable source for the expanding gases to push against, you've also got a second piston moving down while the expanding gases are trying to push it up which will cause havoc and rob lots of energy which is meant to be all used pushing down the piston connected to the drive chain. In short the design has too many moving parts and there all working against each other.

The use of a single cam controlling the top pistons would cause major problems and i would love to see how long the bearings for the top pistons would last, your best bet would be to use two separate cams operating from separate chains. and on top of that your going to have to design a lubrication system efficient enough to keep your top cam/piston bearings happy.

The cubic capacity may have increased slightly compared to a normal cam and valves arrangement but whats the point because all its done is add complexity to the engine when all you had to do is increase the stroke or enlarge the bore and as for the position of the inlet and exhaust ports won't they cause reliability problems in regards to the rings on the top pistons.
Maybe the compression ratio will increase but in the end the Compression ratio is an easy thing to increase and diesel engines tend to run with very high one's anyway.

And looking at it again if your animation is correct your exhaust piston is moving downwards forcing air out of the open inlet port at the same time when air and fuel is supposed to be coming in, your inlet and exhaust timings are out and your mixing exhaust gases with your combustion mixture.
:)





Michael
« Last Edit: 03/04/2006 20:45:43 by ukmicky »
 

Offline ukmicky

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Re: Engine efficient
« Reply #4 on: 04/04/2006 01:23:05 »
One last point how are you going to prevent the oil lubricating the top pistons from draining in the ports and combustion chamber.

Is this for real or a money making scam

Michael
 

Offline Feliks

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Re: Engine efficient
« Reply #5 on: 04/04/2006 09:15:40 »
"top pistons"-what's  oil problems at this mutations                ( Repercussion Czarnobyl  :):))


This drawing are unfortunately.Better draw in 3D.

 Andrew
 

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Re: Engine efficient
« Reply #5 on: 04/04/2006 09:15:40 »

 

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