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It's a beautifully simple concept, I'm surprised that no one's done it sooner. Although as has been mentioned, there is the possibility for it to go VERY wrong. All you need is a single relay/actuator to fail and there goes your engine.
 
F1 run pneumatic springs rather than metal coils, the elasticity of compressed air gives the spring rate with an orafice that vents air so that at lower rpm the spring rate is lower then rises with engine speed, unlike a coil.

Nothing like what people seem to think F1 uses on the valvetrain.
 
Jonnycoupe said:
Nothing like what people seem to think F1 uses on the valvetrain.
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Thanks for the quick explanation, I don't think you can blame people for not knowing about all the intricacies of F1 especially those hidden deep down in the engine bay, they don't really go out there to make it public knowledge do they :)

I knew I'd heard of something similar to this tech in F1 previously.
 
It's not similar though.
It's still camshaft driven with everything the same, it just replaces steel springs with pneumatics.

http://en.wikipedia.org/wiki/Camless
Notably, Formula One cars do not use camless valve trains, but pneumatic valve springs together with conventional camshafts and followers instead, this is however primarily due to the regulations teams must follow for engine development.
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However Renault have looked into it http://scarbsf1.com/valves.html
Last paragraph.
 
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tigerstyle said:
Thanks for the quick explanation, I don't think you can blame people for not knowing about all the intricacies of F1 especially those hidden deep down in the engine bay, they don't really go out there to make it public knowledge do they :)

I knew I'd heard of something similar to this tech in F1 previously.
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I agree with that point. But it doesnt stop the 'F1 have been doing pneumatic valve control for years' comments popping up.
 
Glaucus said:
It's not similar though.
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It's not similar to you who has a deep understanding of the technologies involved, as well as an interest in their exact applications, to the more casual reader they are similar technologies that come under 'changes in cam design working stuff'

Same broad way KERS in F1 is like a Prius, Audi LeMas run a 'KERS' system but it uses no batteries, you know depends how far past the headline grabbing names of the tech you go into it to learn more about it.

Note the tone of my post, it was a question, not like the hundreds of youtube comments going 'Oh this is **** F1 has done this ***** for *** ***'s ***!'

:cool:
 
-westy- said:
It's a beautifully simple concept, I'm surprised that no one's done it sooner. Although as has been mentioned, there is the possibility for it to go VERY wrong. All you need is a single relay/actuator to fail and there goes your engine.
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well no more catostophic than a belt failing, in fact better if one actuator goes it'll only be one valve damaged and a dent in the piston, with a belt several valves will of had an interface with the pistons when it failed.

the possiblities from engine tuning and economy are very high. you could basicly have a two stroke, four stroke or six or eight stroke engine. it could be tuned it have high torque and high rpm. or a V8 that properly shuts down 2/4/6 cylinders when not needed, so really high economy and fun in one package. and the power saving from not having to turn a cam shaft. its the future.


bullit
 
bullit in head said:
well no more catostophic than a belt failing, in fact better if one actuator goes it'll only be one valve damaged and a dent in the piston, with a belt several valves will of had an interface with the pistons when it failed.

the possiblities from engine tuning and economy are very high. you could basicly have a two stroke, four stroke or six or eight stroke engine. it could be tuned it have high torque and high rpm. or a V8 that properly shuts down 2/4/6 cylinders when not needed, so really high economy and fun in one package. and the power saving from not having to turn a cam shaft. its the future.


bullit
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That's a good point - and actually, thinking about it, the system can be engineered so that if an actuator or the whole air system fails, the valves themselves would be retracted, therefore eliminating any possible damage. The possibilities are endless :)
 
Hi all, thought this might interest a few of you. A friend wanted to do a video of my car to practice some techniques for a project he's doing in uni and after a rather chilly Saturday morning spent at the evo triangle this is the result.

 
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