[fastgto]

Read an interesting story on the web about Swedish Super car builder Koenigsegg`s, their new twin turbo V8 will not have any camshafts, instead Pneumatically driven actuators will open and close the valves. Interesting read. Sorry I don`t know how to post , someone can google it and post the entire story .

[Scarebird]

Do you mean electrical solenoids? I do not think pneumatic is fast enough...

[psw]

Of the several one finds in a search, this one seemed to have the most technical info:

http://www.spannerhead.com/2012/02/1...m-less-engine/

[hurryinhoosier62]

Sounds very similar to the HEUI injectors used in 7.3 Power Stroke engines.

[Half-Inch Stud]

That's gonna be sweet; riding along and your NAIL IT, and an Exhaust Valve says "Not this time". Many happy returns to the Dealer.

[adamo]

Formula 1 cars have been doing this for years. Now they run 8 cylinders at around 20,000+ rpm

[Half-Inch Stud]

Originally Posted by adamo

Formula 1 cars have been doing this for years. Now they run 8 cylinders at around 20,000+ rpm

When I find the parts in the Junkyard, then I'll toss the Cam&Lifters, & Rocker Arms.

[nachomax]

Here's a company from Colorado that has been involved in rocket science.

http://www.sturmanindustries.com/mai...eActuation.htm

[David Jones]

Originally Posted by Half-Inch Stud

When I find the parts in the Junkyard, then I'll toss the Cam&Lifters, & Rocker Arms.

I wonder what "they" thought when the 1st guy decided that total loss oiling was too messy and troublesome........

[Half-Inch Stud]

Originally Posted by nachomax

Here's a company from Colorado that has been involved in rocket science.

http://www.sturmanindustries.com/mai...eActuation.htm

I've studied the Hydraulic actuation approach, convinced it works, and would prefer it for our PMD needs. Even came up with a paper design of the oil pressure "Distributor" to be located at the Balancer, and be capable of ganged Intake or Exhaust Advance/Retard. That be the sort of "Aftermarket parts" for this hobby.

[mudbird]

FWIW 2 stroke snowmobiles have all gone to electric servo valves to give variable exhaust valve timing on these "pipey" engines.

I think it is only a matter of time before we see completely electric valve controls with a map like fuel or timing on new engines. Just one more mechanical part of the internal combustion engine to go electric. Just might breath some more life in them...

[Engo]

Originally Posted by adamo

Formula 1 cars have been doing this for years. Now they run 8 cylinders at around 20,000+ rpm

No, F1 only did away with the valvesprings. They still have camshafts.

[Half-Inch Stud]

Originally Posted by Engo

No, F1 only did away with the valvesprings. They still have camshafts.

desmodromic adamo said engo desmodromic adamo said engo desmodromic adamo said engo

There I said it.

[besserspat]

Fiat has been using their MultiAir technology for a couple years now, the North American Fiat 500 has a MultiAir motor , No intake cam , just oil pressure (Throttle/computer comtrolled), to open the intake side valves...No Throttle body either.

Very interesting technology that is adaptable to virtually any existing OHC engine block.

Cheers
Peter

[Half-Inch Stud]

Originally Posted by besserspat

Fiat has been using their MultiAir technology for a couple years now, the North American Fiat 500 has a MultiAir motor , No intake cam , just oil pressure (Throttle/computer comtrolled), to open the intake side valves...No Throttle body either.

Very interesting technology that is adaptable to virtually any existing OHC engine block. Cheers Peter

See, that air actuation will work on the Intake Valve. While Oil actuators work readily on the exhaust. Wonder if a dual system has been implemented?

[adamo]

I was wrong sorry

[camerjeff]

Originally Posted by besserspat

Fiat has been using their MultiAir technology for a couple years now, the North American Fiat 500 has a MultiAir motor , No intake cam , just oil pressure (Throttle/computer comtrolled), to open the intake side valves...No Throttle body either.

Very interesting technology that is adaptable to virtually any existing OHC engine block.

Cheers
Peter

Glad I wasn't the 1st to say that Fiat isussing Hydrolic intake of the 1.4 liter engine, and later this year will be adapting it to the larger 2.0 and 2.4 World Engines when it is renamed the Tigershark for the new Dart. It is very interesting. Only uses a Exhaust cam, that actuall has a 3rd lobe to run a Booster oil pump for the intake valves.

[67 Lamnas]

Originally Posted by hurryinhoosier62

Sounds very similar to the HEUI injectors used in 7.3 Power Stroke engines.

Designed and manufactured at Caterpillar Fuel Systems in Pontiac, IL

[besserspat]

Yes for now they will only use MultiAir on the Tigershark 2.4L and the 2.0L will stay DOHC , on the new 2013 Dodge Dart,but yes the plan is to have MultiAir pretty much everywhere for Fiat and Chrysler.

The system is simple, very effective and adaptable.

http://www.youtube.com/watch?v=XsuZIbWI0dQ

to give you an idea of the potential

Peter

[Schurkey]

...and I thought "Tigershark" was a failed and long-discontinued itty-bitty boat for teenagers to annoy people with.