Rotary valve technology

[IdeaMan]

I just dicovered F1Tech yesterday and read this discussion over several hours.One thought I have is to have two small openings for intake and two for exhaust. As a start these would be sized to flow the same as the poppet valves you are eliminating. This could possibly cause a smaller diameter rotary valve and create high velocities allowing use of conventional overlap cam timing,additionally this at first thought would allow smaller packaging. Resonance of air in a tube.

[IdeaMan]

Also I am working on the seal clues in my subconcious. Mr who

[IdeaMan]

Now I think these through holes, at least the intake should be in the shape of or cause a venturi. Tuned port FI is restricted to the intake valve being open, DI everything can be smaller, injector valve because it can feed fuel during compression and even after ignition if the pressure is high enough, this should allow higher rpms. The seal on slave cylinder of drum brakes seems to use fluid pressure to help the seal seal, so I suppose combustion pressure could be used in similar way for rotary valve seal.

[Carlos]

Consider multiple ports to increase the area of intake and exhaust rather than single large ports, which might have seal snagging problems.

[throwaway1]

So, whats new? Any updates?

[aussiegman]

Six months on, so has there been any movement on this project???

[elmerfud]

I've slept on a good design for 10 years, simply for the fact the any precision timing requires oscillating or momentary rotary motion. If you are deal with a tiny little pooppet valve, no inertia - so no problems.
However, if you are dealing with a long steel shaft with the friction of rubbing seals, also heat buildup??

You dont need a brilliant mathematical mind to realise these hurdles only become worse as the revs increase.
If you crack the code on intertia, friction, sealing and heat then I will the first to be awed by your invention.

[gordonsalive]

Any updates on this development?

[n smikle]

I've slept on a good design for 10 years, simply for the fact the any precision timing requires oscillating or momentary rotary motion. If you are deal with a tiny little pooppet valve, no inertia - so no problems.
However, if you are dealing with a long steel shaft with the friction of rubbing seals, also heat buildup??

You dont need a brilliant mathematical mind to realise these hurdles only become worse as the revs increase.
If you crack the code on intertia, friction, sealing and heat then I will the first to be awed by your invention.

I disagree with this. The sealing problems are not difficult. Because 1: The combustion gases still have viscosity. If your sealing gap (if there is one at all) is small enough and if there is another row of sealing especially the gasses will have to slow down to extremely slow speeds to even pass through, it is almost like the flow has to be laminar! That is asking alot from a big flaming ball of fire in the combustion chamber. By the time that local area of gas near the seals slow down the exhaust port is open.

I am not saying there is no chance of leakage, but for Formula 1 purposes especially, the seals only have to last for a few hours. I am sure Toyota had good longevity with their Bishop valve engine.

[hardingfv32]

... If your sealing gap (if there is one at all) is small enough and if there is another row of sealing especially the gasses will have to slow down to extremely slow speeds to even pass through, it is almost like the flow has to be laminar! That is asking alot from a big flaming ball of fire in the combustion chamber...

This is incorrect. The slightest leak at a poppet valve seat can be observed on the dyno as a loss of performance.

Brian

[gerhick]

Hi all,

I'm another engineer who thinks he may have cracked the rotary valve code, but looking to identify further potential weaknesses to overcome. I'm quite keen to hear if there were any updates from the OP, I'm also located in Brisbane so would LOVE the opportunity to hear more about the concept.

Cheers
-Gerrard

[flynfrog]

gerhick,

I dont think the thread starter has posted here in a few years you might try sending him an email. Feel free to post your ideas here. We would love to read them.

[asenderm7@gmail.com]

rotaryvalveman,

This piece what i'm looking for, I invented a new car engine and i want that piece for the engine, please contact me to asenderm7 at gmail.com.

Thank you.