Ultimate city turbo motor

[James]

Nice calcs Boostboy, damn thats not a very long timeframe is it.

So to make it worthwhile, it would probably have to get across 8mm in 1mS without destroying the valve.

I think very strong and light titanium valves might help with the intertia part. Making them as short as possible would aswell.

[BOOSTBOY]

What about electromagnets?  Combining electro magnetic acuation and pnuematic springs/valve cusions?

[James]

One of those links had a discussion on that method.

BMW is going that way, they are developing a 48volt system for their cars so they can run solenoid actuated valves.

Thats an idea really, you could combine two technologies already well developed, the pnematic springs of formula one, which would be controlling apetures rather than actually trying to force stuff around, and solenoids, which you would just keep pumping more current through until it went fast enough.

It would be fairly heavy tho, 16 decent coils in the head, prolly about the same as two big metal sticks tho i guess  :P

It would be relatively easy to build a prototype for that system aswell, just on a one cylinder lawnmower engine or something, easy as to mill up a head when you dont have water channels or oil channels.

[BOOSTBOY]

ok im getting a headache thinking about this.  I'll think about it over the weekend.

[James]

Oh oh i just thought of a good thing for damping the end of the valves motion, Magnetorehilogical(sp?) fluid, the stuff that liquid, then when you put a magnetic field through it, it goes viscous, i wonder what its response time is...

[doggystyle]

why not just run the springless valve system which uses   double ened rocker that manually opens and shuts the valve without ues of a spring(has one rocker opening and one shutting), no bounce, unlimited revs, then run an auxillary set of electromagnetic/pnematic valves to adjust the airflow cycle accordingly

[James]

Man I am already getting the craving for more cubes, I want an EL in my car and I want it now!

[James]

Looks like I did remember wrong, the cylinders are siamesed together, but with a lot more room between them than I thought, you could get a bit of an overbore.

http://www.cityturbo.com/gallery/albums/album05/DSCF0030.jpg