I've always wondered.
This tech changed F1 forever - pneumatic valve springs
Started by
NSwanberg
, Oct 15 2024 02:26 AM
2 replies to this topic
#1
NSwanberg
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Posted 15 October 2024 - 02:26 AM
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#2
SpeedyNH
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Posted 15 October 2024 - 08:39 AM
nice presentation!
Steve Lang
#3
Dave Crevie
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Posted 15 October 2024 - 09:29 AM
Good video.
Valve float has been a problem in engines with poppet valves since the beginnings of the ICE. Early on, several different approaches were made to get around this. One is the Knight sleeve valve engine;
https://youtu.be/NSM...y4h6ksWZ83P8kFg
Another is the Reynolds rotary valve engine;
https://www.museumof...oldsrotary.html
For the most part, manufacturing difficulties kept these designs from widespread use. But they did address the problems of the reciprocating poppet valve.
From the 1950's on, we have been using titanium valves and spring retainers to reduce the reciprocating weight, and more exotic chrome-vanadium springs that can provide more tension, and less breakage, than the OEM type. I don't think we will ever see gas-operated valves in common use on our automobiles. Too complicated, and too high maintenance. As far as I know, no studies have been done as to longevity of the system. How long before the parts need to be replaced.
It's fine for F-1, where cost is no concern. Just not for us every day drivers.
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