Getting pushy

Started by jaybee, November 23, 2023, 09:52:24 PM

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jaybee

There's nothing agricultural about the good old pushrod V8...not when even the pushrods can be high tech.
https://www.onallcylinders.com/2022/01/13/pity-the-pushrod-why-you-should-pay-attention-to-pushrods/
Rudeness is the weak man's imitation of strength. Eric Hoffer  (1902 - 1983)

idrivejunk

I am suprised that electronic actuators mounted in overglorified reinforced retrofitting valve covers have not replaced valvetrains by now.
Matt

jaybee

The Freevalve engine has supposedly been on the edge of small volume production for quite a few years. The engine geek in me really likes the idea of having valve timing that's absolutely perfect for every condition, right down to altering timing and fuel so as to light the catalysts faster and incorporate EGR by exhaust reversion. Sounds great...but the implementation turns out to be complicated. https://www.enginelabs.com/news/failure-to-launch-what-happened-to-the-freevalve-cam-less-engine/
Rudeness is the weak man's imitation of strength. Eric Hoffer  (1902 - 1983)

chimp koose

I think in order to have a computer actuated valvetrain the engine must be designed to operate at a much slower rpm . I have not kept up with the technology but it used to be that the solenoids that opened the valves could not function well at the speeds of current engines .

kb426

Formula 1 had an air operated system years ago. I think it was banned but never did read why. https://www.f1technical.net/forum/viewtopic.php?t=24821
TEAM SMART

tomslik

thanks, i always wondered about those
The last thing I want to do is hurt you. But it\'s still on my list

jaybee

Wow, that's incredible work. And there's only 31 more of them on each engine.
Rudeness is the weak man's imitation of strength. Eric Hoffer  (1902 - 1983)

enjenjo

The biggest problem with electronic valves seems to be reliably closing them. That is critical for longevity.
Welcome to hell. Here's your accordion.

jaybee

I'd say that about sums it up...and it's a real understatement.
Rudeness is the weak man's imitation of strength. Eric Hoffer  (1902 - 1983)