Rotary valve -- someone finally got it right?
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Rotary valve -- someone finally got it right?
http://www.v-eight.com/multimedia/pdf/AutoTechBRV.pdf
Very interesting. It kills me though how these restrictions are made for F1 -- they are supposed to be pushing the envelope and developing new ideas to get around certain restrictions. It advances the forefront for automotive technology, why ban this type of technology? It's Formula One, you can't do things to make the sport "more competitive" -- there's nothing higher! That's like telling NASA not to use a certain type of rocket because it's not fair to Russia...
I think that if someone is finally figuring out how to get a rotary valve to work, then why not use it? I can't believe that pneumatic valvetrains are allowed, but rotary valves aren't. Which has more potential to actually be used in production cars? Which is a larger, more significant jump in automotive technology? Hopefully some other company will pick this up, or maybe Mercedes will continue to pursue this for their production cars.
Very interesting. It kills me though how these restrictions are made for F1 -- they are supposed to be pushing the envelope and developing new ideas to get around certain restrictions. It advances the forefront for automotive technology, why ban this type of technology? It's Formula One, you can't do things to make the sport "more competitive" -- there's nothing higher! That's like telling NASA not to use a certain type of rocket because it's not fair to Russia...
I think that if someone is finally figuring out how to get a rotary valve to work, then why not use it? I can't believe that pneumatic valvetrains are allowed, but rotary valves aren't. Which has more potential to actually be used in production cars? Which is a larger, more significant jump in automotive technology? Hopefully some other company will pick this up, or maybe Mercedes will continue to pursue this for their production cars.
'87 BMW M6 / '88 BMW M5 / '90 Audi Coupe Quattro / '88 Fiero GT 2.3L Quad4 - 400whp; pump gas
- Shaun41178(2)
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Interesting read. What I think is cool is how high of a CR they can run with that setup. And thts with conventional fuel too.
Add E85 to the mix and you can add more CR. it also burns cleaner. With CR around 15:1 or higher with E85, you would probably see as much power output as a conventional engine on conventional fuels. With this design you might be able to do 18:1 compression with E85, and still be able to run a turbo. Talk about big power out of small engines. Which would be great too for fuel economy.
50 mpg 300 hp 1.5 liters.
Add E85 to the mix and you can add more CR. it also burns cleaner. With CR around 15:1 or higher with E85, you would probably see as much power output as a conventional engine on conventional fuels. With this design you might be able to do 18:1 compression with E85, and still be able to run a turbo. Talk about big power out of small engines. Which would be great too for fuel economy.
50 mpg 300 hp 1.5 liters.
Also -- imagine the space savings. It's got the size advantage of a pushrod engine (probably an even smaller head) with the airflow advantages of the rotary valve. The very reason that the LS7 isn't DOHC (and the N* isn't 7L) is no longer an issue. Imagine a 7L engine the size of the LS7 but with airflow characteristics that surpass the nicest production DOHC engines. Imagine the weight and size savings in motorcycles -- scary! I've seen several different designs, but this is one of the first I've seen that incorporates the "valve" and port into one. The idea that I had in mind was kind of a larger "camshaft" with a rectangular hole through it and a typical port, but this seems much better.
'87 BMW M6 / '88 BMW M5 / '90 Audi Coupe Quattro / '88 Fiero GT 2.3L Quad4 - 400whp; pump gas
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Sweet read.
As Pyrthian said, sealing is the issue.
You could do it with some expensive, low wear, low thermal expansive material like ceramic but that problem is just that, its expensive.
It sucks that F1 banned it but I understand why.
Sure they are supposed to be pushing the limits of technology but at the same time they are trying to have a safe racing league. Adding this technology would increase power(faster cars), decrease weight(even more speed) and require a complete re look at the current engines for all teams.
So faster cars are more dangerous and new tech liek this that will need more than just a head swap is pricey.
As Pyrthian said, sealing is the issue.
You could do it with some expensive, low wear, low thermal expansive material like ceramic but that problem is just that, its expensive.
It sucks that F1 banned it but I understand why.
Sure they are supposed to be pushing the limits of technology but at the same time they are trying to have a safe racing league. Adding this technology would increase power(faster cars), decrease weight(even more speed) and require a complete re look at the current engines for all teams.
So faster cars are more dangerous and new tech liek this that will need more than just a head swap is pricey.
1988 Pontiac Fiero
Ecotec swap taking much too long...
Ecotec swap taking much too long...
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Speaking of a differnt type of valve-train, have you looked a Ducatti valvetrains? They have no valve springs.
http://www.ducatitech.com/info/desmo.html
http://www.ducatitech.com/info/desmo.html
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