Valveless head

[strech4020]

I've been stirring the idea of this for a while and can't quite make things fit, so here it goes. This head would be intake opposite side as the exhaust with a circular chamber inside. the chamber is open to the bottom (as to be the top of the combustion chamber) and there will be an intake port and exhaust port. Now take a triangular metal block with rounded edges to meet the inside of the circular chamber. Put this block on a shaft and spin it. As it spins it opens to the intake and combustion chamber, allowing the air/fuel mixture in. It next closes flush with the combustion chamber and then opens to exhaust.

Sorry if thats hard to follow, but i will try to draw something and get it posted if need be.

Feel free to find all flaws, Marc

 

[rbohm]

8) been tried several years ago, though they use round blocks that opened up the port at the right time. there were problems with the system, specifically sealing the system against combustion pressure and temperature.

 

[Anlushac11]

8)

The 2.3L crowd on Stangnet contacted a guy about making a rotary valve head and he was willing. IIRC he wanted $6000 minimum per head.

http://www.coatesengine.com/eGallery/pa ... System.htm

 

[wallaka]

Rotax has been making rotary valve engines for decades. They are commonly found on Sea-doos and other Bombardier products. They also make light aircraft engines.

 

[fb71]

and now they make a 72deg V-Twin for the new Buell 1125R...

But don't call it a Butax....

 

[ludwig]

A fella I worked with in France in 1972 had a rotary valve system that he developed all by himself. He put in his Renault Alpine to race at Le Mans. He had a blockage in the gear box and finished the race in second gear with an average RPM in the high 8K range, peaks to 12K.
He had a patent on the desegn and tried to sell it to Ford. He even talked to the engineers in Detroit with his data sheets. NIH = no sale (not invented here).