http://www.wimp.com/combustionengine/ (http://www.wimp.com/combustionengine/)
That's pretty cool
probably not too far off from the pnuematic valve system that HRC uses in the RC212V if I had to guess....still cool to physically see it and know the capabilities and benefits.
Awesome. Those ideas have been around a long time. Nice to see that work is still progressing.
Think of it...
Infinitely adjustable duration and overlap :D
Big brains are very cool things.
This is one of those very frequent times I wish I had one.
Those parts seem to work well on an automotive engine.
I find their claims of being used in a 15,000 rpm moto engine a bit hard to swallow.
They say in the video 'opening in a few milliseconds' and 'closing in a few milliseconds'.
The spec sheet I dug out of the Cargine website had the following info:
Rise time 1-8 mm: 2.5 ms
Fall time 8-1 mm: 2.6 ms
Activation delay: 4.5 ms
http://www.cargine.com/wp-content/uploads/2013/01/Cargine-Free-Valve-Actuator-G5-Specification-2012-09-291.pdf (http://www.cargine.com/wp-content/uploads/2013/01/Cargine-Free-Valve-Actuator-G5-Specification-2012-09-291.pdf)
So it's over 5 ms for the quickest valve event.
At 15,000 rpm, it's 4 ms for a complete crank revolution.
Even a long duration cam, the valve event is going to be ~3 ms.
They'd need a system ~2x faster.
Perhaps they're holding something back.
Quote from: Speeddog on June 26, 2013, 10:25:09 AM
Those parts seem to work well on an automotive engine.
I find their claims of being used in a 15,000 rpm moto engine a bit hard to swallow.
They say in the video 'opening in a few milliseconds' and 'closing in a few milliseconds'.
The spec sheet I dug out of the Cargine website had the following info:
Rise time 1-8 mm: 2.5 ms
Fall time 8-1 mm: 2.6 ms
Activation delay: 4.5 ms
http://www.cargine.com/wp-content/uploads/2013/01/Cargine-Free-Valve-Actuator-G5-Specification-2012-09-291.pdf (http://www.cargine.com/wp-content/uploads/2013/01/Cargine-Free-Valve-Actuator-G5-Specification-2012-09-291.pdf)
So it's over 5 ms for the quickest valve event.
At 15,000 rpm, it's 4 ms for a complete crank revolution.
Even a long duration cam, the valve event is going to be ~3 ms.
They'd need a system ~2x faster.
Perhaps they're holding something back.
Maybe I took it wrong, but I thought he was saying there was a few milliseconds delay before the actuator moved, not for the entire event
Quote from: Ddan on June 26, 2013, 02:03:33 PM
Maybe I took it wrong, but I thought he was saying there was a few milliseconds delay before the actuator moved, not for the entire event
That's how I understood it.
I heard " a couple millisecond delay, a couple millisecond open, a couple millisecond close."
More or less.
Too bad we'll probably never see it here.. some great tech..
Thought some of you would know more about this than me. [thumbsup]
Quote from: Monsterlover on June 26, 2013, 06:13:54 AM
Awesome. Those ideas have been around a long time. Nice to see that work is still progressing.
Think of it...
Infinitely adjustable duration and overlap :D
This.
That tech stuff is all well and good, but the sound of that Koenigsegg car is beyond amazing.