Camless Engine

[Blind Squirrel]

https://www.gizmag.com/qoros-qamfree-camless-engine/43045/

 

[Knifemaker]

Interesting. Wonder how dependable those actuators are though.....

 

[Uncle Hud]

That arrangement would allow for easily-altered variable valve timing. Right?

 

[bajaleo]

That arrangement would allow for easily-altered variable valve timing. Right?

Yes, and also no parasitic loss from having to rotate the camshaft, chain/belt and associated hardware.

 

[BwanaDik]

Isn't this how the current F1 engines operate? Pnuematic valves?

 

[PJ4863]

Isn't this also how a rotary engine works?

By that I mean, it's camless.

 

[wfooshee]

Isn't this how the current F1 engines operate? Pnuematic valves?

F1 engines have pneumatic pressure only to close the valve, rather than having metal springs. They still use cams. Air closure has no floating at higher RPM, which gives them the 20,000 RPM capability (which they can't actually use due to fuel consumption limits.)

I truly remember asking in high school why solenoids couldn't be used for engine valves. The concepts of variable timing and variable lift were beyond me, but I knew that a whole bunch of mechanical nonsense could be thrown away if it could be done. The electronics of the 70s might not have been up to it, and by "solenoid," I was thinking of the thing that pulls the lock button up and down when you hit the button on the door. Those probably weren't up to valve actuation speeds, either.......

 

[Viper Pilot]

Isn't this how the current F1 engines operate? Pnuematic valves?

Yup, it sure is. Was first introduced by Renault many years ago.

 

[wfooshee]

Isn't this how the current F1 engines operate? Pnuematic valves?

Yup, it sure is. Was first introduced by Renault many years ago.

See my post right above yours. The pneumatics in F1 replace the valve springs, that's all. They do not open the valves. F1 engines still have camshafts, and the air pressure in the pneumatic system closes the valve