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Old 03-30-2014, 10:23 AM
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Brian Martin,Freelance adviser
 
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What else can be done with an internal combustion engine?

How the Duke Engines increases the efficiency of the internal combustion engine

VERY interesting stuff!

Brian

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Old 03-30-2014, 01:12 PM
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Looks like half of a K-cycle engine patented here in Canada back in the 80's, I knew a few machinists who made parts for it. It had a few issues which were likely surmountable with more research time and money, Dr Kristianson died during development.

Heres the patent PDF, have a look.



http://members.shaw.ca/zenonp/Misc/KCycle.pdf
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Old 03-30-2014, 01:15 PM
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Brian, Yes, very cool technology. Although not exactly new, right away it made me think of these: Axial piston pump - Wikipedia, the free encyclopedia. You can google "swash plate hydraulic pumps" and see many similarities that have been carried over. In fact the wiki article reminded that AC compressors on cars work in a similar fashion. The main difference of course is that they a creating energy with this design, not using energy. Interesting to see how far this goes!
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Old 03-30-2014, 04:45 PM
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The lack of power robbing valve train components is very nice. All the benefits of a two stroke or rotary engine without the drawbacks of apex seals or adding oil to the fuel. My concern is the longevity of the reciprocating pieces connected to the crankshaft in the rear of the block. Wonder why 5 cylinders though rather than 3? Smoothness of operation perhaps?
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Old 03-30-2014, 04:59 PM
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Really cool. Thanks for posting.
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Old 03-30-2014, 05:20 PM
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get rid of camshaft, pushrods, springs, valves.

now it should rev

http://www.coatesengine.com/files/th...vs_poppet.html

/\ animation /\

Coates International Ltd. - Home
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Old 03-31-2014, 03:23 AM
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Koenigsegg (supercar manufacturer in Sweden - makers of the Koenigsegg one - which has one HP per pound of car!) has a design called "freevalve".

Picture a system patterned after the port injection FI system, but manages hi pressure air.

Now, replace your valve springs with compressed air springs (less mass) and then adds another system whereby compressed air opens the valves instead of a cam and lifters.

A computer-operated system injects air into "air bags" to open and close the valves.

Result: Just like fuel injection, the timing and duration as well as amount of lift are all adjusted according to demand and adjusted a zillion times per second, just as your FI system does with fuel metering.

NO CAM at all, no lifters, no valve springs and can be used in current engine designs. No more deciding what cam to buy, no compromises for torque vs top-end horsepower, virtually zero valvetrain weight and zero friction losses.
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Old 03-31-2014, 08:47 AM
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Interesting Dave, yep, it ain't over yet for the internal combustion engine!

Brian
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