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Old 03-03-2013, 07:20 PM   #1
Jason_Canuck
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Free Valve Technology

Pretty Cool Video
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Old 03-03-2013, 08:04 PM   #2
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Awesome!
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Old 03-03-2013, 08:30 PM   #3
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I'm in automation and control and wondered for years why we haven't done something like this for cars. I do it on huge industrial compressors all the time. Imagine having a to turn that increases lift and duration. Turn it from a economic car to a race car with a flip of the switch. Turn cylinders on and off...I knew it was the future and I'm glad to see it being tested. They can do the same thing with electrics and get higher rpms. Pneumatics work with a limitation of the speed of sound where as electronics work at the speed of light. It may not be an issue though with rpm limitations unless they run a smaller motor capable of the higher rpms. They only need to operate at 1/2 the crank rpms so it may be a non issue however electronics can be tuned better and do not require a tank. With pneumatics, it seems like it would self tune baed off of the engines pressures developed in the rev cycle. I wonder what kind of throttle response they get.
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Old 03-03-2013, 09:58 PM   #4
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Free Valve Technology

As I understand they are pneumatic return springs on solenoid activators? Did I get that right?

Either way definitely cool and definitely something I want to see in production cars.
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Old 03-03-2013, 10:19 PM   #5
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They could be push/pull pneumatic but for return, a return spring is sufficient to certain rpm. If they want to get to ridiculous rpm, they would have to do push/pull in order to get the speed out of the valve. Springs will allow the valves to float at certain rpms.
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Old 03-04-2013, 01:33 AM   #6
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This in an F20C engine = unlimited RPMs
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Old 03-04-2013, 09:01 AM   #7
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i hope a company starts doing retro-fits for these on big 4 bikes, that would be so awesome to simply remove the head and do a bolt on to a bike
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Old 03-04-2013, 09:10 AM   #8
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Quote:
Originally Posted by 90degree View Post
i hope a company starts doing retro-fits for these on big 4 bikes, that would be so awesome to simply remove the head and do a bolt on to a bike
There would be a lot more to the swap than that
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Old 03-04-2013, 12:46 PM   #9
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really awesome tech!
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Old 03-04-2013, 02:01 PM   #10
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"Free" valve? Fancy name for a rather old technology. Pneumatic actuators, or even hydraulic ones, are not new. Problem with air is that it's compressible, so depending on the the intra-cylinder pressure and, to a lesser degree, back pressure in the exhaust track, valve lift might be affected and therefor not deterministic like with mechanical degreed cams.

More promising, but no less challenging to develop, are solenoid-actuate valves, which I believe holds the real future for valve actuation. Electrical control can be far more responsive to feedback control and more precisely driven - both in timing and duration. The amount of power needed to deliver the required level of control, though, must come from higher voltage. Cars will eventually need to have a 24V, 48V or even higher voltage system. There is a lot of industry talk about going to a dual-voltage system to maintain 12V legacy support. Higher voltage will allow virtually all systems (steering, brake, suspension, engine control, etc.) to be run on electric. MPG efficiency is a main impetus for going that direction as well.

Pneumatic and hydraulic systems are too cumbersome and inefficient compared to electric/electronic drive.
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