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have you considered a virtual model? i.e. 3d I have made such models under NDAs for a few 'inventors' . it can be instructive , i have pointed out a few wrinkles as well;-) BTW what you described initially, put me in mine of the Marshall Tri-dyne engine :http://wktodd.webspace.virginmedia.com/animations/Tridyne%20colourised.gif
If you have not already seen it, check out the Doxford opposed piston marine engines. There is a museum and a web site with history and pictures.Hugh
Also take a look at Napier Deltic ---Commer T S 3--- Junkers Diesel aircraft.-- Free piston engines.it May help.Brian
The one I thought of at school (From memory) had one inner and one outer 'piston' and 'cylinder' the 'piston' was offset from the 'cylinder' with the piston spinning inside the also spinning cylinder. I remember getting stuck with sealing, as the 'piston ring' needed to be split at the 'corners' so that the centre ones could centrifuge outwards while the side ones were pushed sideways.C.
QuoteThe one I thought of at school (From memory) had one inner and one outer 'piston' and 'cylinder' the 'piston' was offset from the 'cylinder' with the piston spinning inside the also spinning cylinder. I remember getting stuck with sealing, as the 'piston ring' needed to be split at the 'corners' so that the centre ones could centrifuge outwards while the side ones were pushed sideways.C.Sounds like the Cooley design (pre cursor to the wankel which used the same basic mechanism) www.douglas-self.com/MUSEUM/POWER/rotaryengines/rotaryeng6.htm#coolNot wishing to sound too cynical, but I doubt you will have come up with any basic layout that would be patentable , the are a finite number of cylinder and piston arrangements and they've all been tried before, often many times. Most new engine patents these days seem to have been devised only to circumvent previous patents , there's just not a whole lot of originality left.Bill
Mine doesn't have a crankshaft or output shaft, and only delivers electric current.
Quote Mine doesn't have a crankshaft or output shaft, and only delivers electric current.So we are talking about a free-piston oscillator or a cam engine ? Bouncing pistons off springs , gas or magnetic fields ? (NASA played with this for an in space generator and there's at least one company selling a Stirling cycle free-piston generator for the home) Cams ( ) lots of promise , lots of designs , few have solved the piston-cam interface problem and had any commercial success. Here's one I animated, just out of NDA - http://www.5cycleengine.com/
Are you thinking of something like this?http://www.greencarcongress.com/2013/02/dlr-20120220.html
Is there no one interested in my design?C.
While I consider sharing my ideas,
didn't even know it was called a 'Free piston engine' I did call it an opposing piston engine in the title, though.
I've decided to release my engine design. Here is a 2D animation showing the general idea, I hope someone will enjoy looking at it and maybe make a model. If anyone does want to make one, I am able to help with the coils and magnets for the generator side.Any questions welcome, best wishes.Camerart.
interesting idea, is it IC or steam ? Also 2 problems with stuff 1, the oil companies will buy up the patents then sit on them so they can still sell oil products for inefficient 19 century infernal combustion engines..........2, the chinese will copy it and make them without due regards to the inventor.....Hope this is not too negative sounding. What about lubrication as there will be no splash as with con rods....how is it started........ Good luck however.!!
Hello Camerart.It looks a very nice design however " prior art " might just be a problem. The Körting Engine was essentially a single cylinder version, there's a nice picture of one in Rankin Kennedy's Modern engines and power generators of 1905.I also see some problems arising in the animation. As the compressed air is admitted it will have a tendency to go straight out of the exhaust ports, not a problem if you're going to use Diesel fuel directly injected but the complete opposite for fuel/air mix. I also notice that during the air compression stroke the ports are open, so some practical means would be needed to keep them shut until the required time. Kind regards, Graham.
Lots of unusual and innovative engine designs in these threads on autosport;http://forums.autosport.com/topic/74960-new-engine/http://forums.autosport.com/topic/200769-patat-2-stroke-turbo-diesel/http://forums.autosport.com/topic/199557-sleeve-valves-vs-opposed-pistons/http://forums.autosport.com/topic/197904-patre-rotary-engine/Worth wading through as there is some impressive stuff.Simon
Making models takes time so people normally make models of what they want to make and they start by looking at the drawings.If you want someone to make a model for you of a specific design there are people who will do so but they require payment by the hour.Jo