Radial- Diametral Head

Todd Knighton knighton at net-quest.com
Thu Sep 12 16:47:49 GMT 1996


Hans Hintermaier wrote:
> 
> Hi head builders,
> because of the big resonance for the radial- diametral head of
> "Apfelbeck", I put the GIF images on the web.
> http://www.nefo.med.uni-muenchen.de/~hiha/gif/

Interesting, but I saw an even more interesting design at the SEMA show
last year.
It incorporated what looked like two camshafts, but they were also the
ports and valves as well.
They were basically ball valves, that opened and closed the port from
the head, rotating at 1/4 crank speed I think.  The shape of the opening
in the ball valve determined the valve events.
They had these things on a few 4 valve mercedes engines and had them
passing emmissions, but with a 20% increase in overall power.  The
torque curves looked great as well.
The only scary thing was the seat.  Is was a spring loaded seat, for a
good seal from the combustion chamber that rode on the rotary ball valve
thingy.  I could definately see those things getting torn up.  But they
"Said" that they had already run them in the 50,000 and 100,000 mile EPA
durability tests and "got by"

Todd Knighton
Protomotive Engineering



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