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Automotive Powered Off Road (AKA: Buggys, Jeeps, Trucks, Etc,Etc. ) => Motor and Drivetrain => Topic started by: trojan on June 24, 2009, 10:36:24 PM

Title: No gears, camshaft, cams or push rods
Post by: trojan on June 24, 2009, 10:36:24 PM

http://home.cogeco.ca/~davebowesevic/index.html (http://home.cogeco.ca/~davebowesevic/index.html)

Title: Re: No gears, camshaft, cams or push rods
Post by: artie on edge on June 24, 2009, 11:12:46 PM

I really can see this being the way of the future. No friction losses due to valve train drag and infinitely variable valve specs, not just timing as is the case now.

Good one.  ;)

Title: Re: No gears, camshaft, cams or push rods
Post by: BDKW1 on June 24, 2009, 11:36:21 PM

Dead end technology for the time being. The little airplane motors take 15 amps per valve to work at the speeds they need to achieve 8400RPM. Where are you going to get 30 amps on a model plane for any length of time? Now scale that up to full size and it gets really scary. You would need some serious linear motors to make a 2.02 valve hop around a 6500rpm.
 
You want something the frees up power, spherical valves.

Title: Re: No gears, camshaft, cams or push rods
Post by: SPEC on June 25, 2009, 04:51:19 AM

That certainly is neat,
But I think it has a way to go before it's feasable

Title: Re: No gears, camshaft, cams or push rods
Post by: fabr on June 25, 2009, 08:34:43 AM

Did not F-1  use that technology at some point?

Title: Re: No gears, camshaft, cams or push rods
Post by: trojan on June 25, 2009, 09:33:07 AM

Are you mistaking it with pneumatic valves? same thing but using air.

Title: Re: No gears, camshaft, cams or push rods
Post by: BDKW1 on June 25, 2009, 10:28:44 AM

F1 cars still use pneumatic valve springs. They are actuated by regular cams though. Aprillia and some other company also has them in WSB.

Title: Re: No gears, camshaft, cams or push rods
Post by: fabr on June 25, 2009, 11:07:20 AM

I thought that I had read that they were working on electric stuff.Maybe I was wrong. It was a few years ago. I thought they were saying that the pnuematic stuff was having issues.Things have likely changed a lot since I read whatever it was.

Title: Re: No gears, camshaft, cams or push rods
Post by: urubu on June 25, 2009, 05:59:15 PM

I heard that the solenoid actuated valves were coming on the large diesels in the over the road trucks.