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  #31 (permalink)  
Old 12-13-2005, 07:30 AM
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Time marches on

I do believe that eventually, and when it does happen,selonoid valve actuation will be on high end priced performance vehicles, to start with, but some day it will happen. In the 60's, a normally aspirated engine making more than 1 HP per Cubic Inch was a big deal. Today, its not uncommon to see them making 2 1/2 HP per cubic inch. With the advent of selonoid controlled valves. I can see normally aspirated engines putting out 4 or more HP per cubic inch.
I remember back in mid 60's, when the TV series Star Trek came out, those guys were walking around with hand held communicators and everyone thought that was funny, but today, everyone and their kid brother are carrying them, the Cell Phone.
It wouldnt surprise me to see practical models of selonoid operated valve engines to become common on the market in my lifetime, and Im 57 yrs old.
Statistically, the rate of technological developement doubles every 10 yrs.

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  #32 (permalink)  
Old 12-13-2005, 09:41 AM
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want to see the latest and greatest in valvetrain technology? just check out a formula one car from ferrari, honda, toyota, bmw, mercedes, etc......takes alot to spin an engine to 17,000 + rpms and sustain those levels for any amount of time.....i agree with max keith, we will see HUGE advances in engine design in just our short lifetimes that we would have never thought possible even just a couple of years ago..........exciting in a way, but at the same time, frustrating for a mechanic like me...............how much more complex are they going to get before we actually can't/don't have to work on them anymore? boggles the mind just to think about it............
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  #33 (permalink)  
Old 12-13-2005, 12:54 PM
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In a conversation with one of our engine design managers awhile back, he told me that the solenoids required to keep up with this will use a lot of juice -- so they are looking at going to a 42 volt system and an alternator in line with the drivetrain (between the crank and tranny) to provide it.....

The technology will come.....
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  #34 (permalink)  
Old 12-13-2005, 05:08 PM
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Max, you are correct about the solenoids and are in agreement with the designer of this particular engine. (Of which there are at least three functioning examples). The maker stated that he was very limited by selection of solenoids. A bigger engine, thus larger valves, would require stronger solenoids. And above a certain rpm any currently available larger ones couldn't react quickly enough to be useful.
The engine I'm talking about is the "EVIC-211", designed and built by David Bowes. He has a website-here

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Old 12-13-2005, 11:12 PM
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[QUOTE=Max Keith]I do believe that eventually, and when it does happen,selonoid valve actuation will be on high end priced performance vehicles, to start with, but some day it will happen. In the 60's, a normally aspirated engine making more than 1 HP per Cubic Inch was a big deal. Today, its not uncommon to see them making 2 1/2 HP per cubic inch. With the advent of selonoid controlled valves. I can see normally aspirated engines putting out 4 or more HP per cubic inch.
QUOTE]

BTW, I also can see this engines, but where are torque monsters?

As for future technologies,maybe at least I would see advertising like "NO computers,NO electronics,FULL analog system"...

But,honestly, i'm just very confused.

Last edited by Nightrider; 12-13-2005 at 11:26 PM.
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  #36 (permalink)  
Old 12-14-2005, 02:43 PM
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Solenoids actuating conventional poppet valves is only the first step. Since it's obvious that large, power hungry solenoids will be needed, there are a couple solutions.

Activating a poppet valve with a reversed rocker arm is the first one that comes to mind, and the most adaptable to existing engines. By "reversed" I mean a short arm activating the valve, a long arm on the solenoid. That will require a longer stroke solenoid, but a less powerful one due to leverage. It would probably take a new head design also.

The real next step will be to eliminate poppet valves. Some type of rotary ball valve, or even the old sleeve valve might be quicker. I'm out of my league here, but there are other ways. This would definitely require a new head design, and more likely an entirely different engine design. With fuel prices destined to soar over the next 10 or so years, one can only wonder if a new internal combustion engine design is worth pursuing. It would have to deliver a lot better economy as well as power, though generally speaking anything done to improve power has the potential to improve economy as well.
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  #37 (permalink)  
Old 12-14-2005, 11:36 PM
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Last edited by Nightrider; 12-15-2005 at 11:25 PM.
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