And use different diameter pistons at each end and you get the equivalent of changeable rocker ratio. I realize that that wasn't a limitation on a Model T, just thinking if this might have some applicability to today's engines.peejay wrote: ↑Sun Dec 09, 2018 10:36 amControl the oil volume with high speed solenoids to bleed the oil out, and you have the Fiat Multiair system.SchmidtMotorWorks wrote: ↑Thu Dec 06, 2018 11:10 pm In a similar idea, some have filled the tube with oil for hydraulic activation.
Unique OHV mechanism
Moderator: Team
Re: Unique OHV mechanism
Carl Ijames, chemist not engine builder
carl ddott ijames aatt verizon ddott net
carl ddott ijames aatt verizon ddott net
Re: Unique OHV mechanism
Yes, very interesting but looks like a solution to a non problem or a problem looking to happen...
Motorcycle land speed racing... wearing animal hides and clinging to vibrating oily machines propelled by fire
Re: Unique OHV mechanism
I first heard of this in an article 25 years ago from Car & Driver (or maybe it was Road & Track) discussing various methods.
If you calculate the mass of all the steel balls vs a tubular pushrod … well, maybe the guy owned stock in a ball bearing factory.
However, I've often wondered if a viable tensile actuator mechanism could be fangled with steel wire/cables or Carbon Fiber.
Rather than tappets, finger followers under the cam with cable/wire attached at the ends to pull them downwards.
Or perhaps use a push/pull cable to achieve Desmodromic operation?
OHC seem to have rendered such fantasies moot ...
If you calculate the mass of all the steel balls vs a tubular pushrod … well, maybe the guy owned stock in a ball bearing factory.
However, I've often wondered if a viable tensile actuator mechanism could be fangled with steel wire/cables or Carbon Fiber.
Rather than tappets, finger followers under the cam with cable/wire attached at the ends to pull them downwards.
Or perhaps use a push/pull cable to achieve Desmodromic operation?
OHC seem to have rendered such fantasies moot ...