DIYEFI.org Forum

The electro-hydraulic is what I've seen used in the one commerical system out on the market. It does seem to be the easist method to help deal with power efficency and packaging requirements.

The Sturman Industries valve system I think went up to like 12000rpm, tho they are marketing for diesels right now as that is were the most money is. They use an oil pressure system to move the valves, but still solinods eventually help control that flow. Its been a while since I read all their pate...

There have been a number of attempts with rotary valves on 4-cycle engines, they always had sealing issues. There are a few companies out there that. This one has some web presence http://www.coatesengine.com/technology.html
Interesting stuff.

Yeah I mean having a complete 2nd processor just for that task is overkill. Assuming the firmware is bug free then it should never hang or get into some endless loop were it would run past whatever its execution time should be, in the case of keeping 1* accuracy at 6K that would be 28 microseconds. ...

I've been talking with Wiglaf about this project for a while now. I am a software developer and just a general tinker, understand basic electronics but not much more then that. As far as timing 1* would be bare minimum, 1/10th would be a lot better. Processing power really is dependent on how comple...