Electronic valve control

[Shannen Durphey]

Martin Hill wrote:

> >
> >
> > I had an idea a few years ago which would solve the valve problems, but
> > I am not going to tell any one about it unless you promise not to go and
> > make the prototype and sell it for huge sum of money, I want the
> > patent... or I will swap the design for a cone shaped hat...
> >
> > Anyway, the idea is this ( and no it probably won't work ) insted of
> > valves with springs, you have a metal rod in both the inlet and exhaust
> > port.  The rod is cut so that at zero degrees a hole the size of the
> > port is exposed, thus air/exhaust can flow down the port, through the
> > hole.  at 90degrees the hole will be facing away from the port, thus
> > exposing the metal of the rod and therefore closing the port.
> >
> > If you use a solenoid on a level which is connected to the rod, the
> > opening and closing will take less effort than a spring, and provide
> > just as good a seal.
> >
> > The fact is that ports would no longer need to be circular, so you can
> > have a much larger inlet and exhaust width, should one be wanted. plus
> > the timing would be computer controlled.
> >
> > You may or may not think that this idea would work. unfortunaley due to
> > my insanity I care very little.
> >
> > Rob Humphris -- Too fat to run, too stupid to hide.
> > >
>
> Sounds very much like a rotary valve to me.  This does work and has
> been done before.  Although the one that I have seen is just driven
> off the engine.  The bit about the valves being in a shaft is the
> same though.  The shafts were driven like a camshaft.   I think there are problems with sealing the ports.  The
> advantage is that it can do loads of rpm.  The one I saw was around
> 14000 I think.  As there is no valve bounce to worry about.  Another
> good point is that if something does break there is no valve to hit
> the piston.
>
> Martin

  Rotary valves.  I think they hit a popularity peak around 1910, along with the steam locomotives they were used
in.  What would happen as carbon tried to build up on the valve? Or inside the port as oil tried to burn there?

Shannen