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Hey motorheads. No more camshafts

they have been trying for a while, HD Diesel engines have been testing for years due to the low RPM.

Just a matter of time that the only load on an engine is the rings
 
That's so freezing cool.

That would be an awesome project to be working on :waytogo:
 
This idea has been around for a while. Seems like I read the problem is they don't close fast enough at higher rpm.
 
nvrenuf said:
This idea has been around for a while. Seems like I read the problem is they don't close fast enough at higher rpm.
Click to expand...


If they can solve that... Its pretty slick.

The valve profile is impossible to get with any cam as they said.

So cool :bow:
 
Isn't how they did that old Cadillac engine? The one you could shut off certain cylinders for "better economy" back in the 80's?
 
That was the North Star system in the Cadillac I believe. Ran on half the cylinders til you opened up the throttle so cruising would get high twenties mpg.
 
Wowwww:bow: Now I know what technology will make my Suburbaraptor FTL capable!!
All jokes aside that's AWEsome! And maybe cool enough to make us gearheads actually LIKE the progress from old school mechanics.

Really Cool/Really Infuriating Fact: My grandfather(full blood German) designed and built an engine, that my Dad said was super efficient and powerful, in his garage. He sold the patent to the government who came and took the engine and destroyed it along with the information on it. Don't know how much he was paid but it burns me up that we could have had a very different life than this one.
 
cybrfire said:
Isn't how they did that old Cadillac engine? The one you could shut off certain cylinders for "better economy" back in the 80's?
Click to expand...

chulisohombre said:
That was the North Star system in the Cadillac I believe. Ran on half the cylinders til you opened up the throttle so cruising would get high twenties mpg.
Click to expand...

It wasn't a Northstar engine. It was a 368 cube (6.0l), the same 472/500 basic engine design Cadillac had for years, but the engine was controlled by one of the first of GM's engine control modules (ECM) it was also digital FI (throttle body)...but it wasn't a very mechanically reliable system for solenoid deactivation of the rocker arms on the center cylinders of each bank.

I worked at a Cadillac dealer at the time these came out, and they were constantly a headache, right along with the Olds diesel equipped cars.
 
Good info. I was only a kid back then but ive heard people call those engines the northstar system engines I thought. Which ones wrre those then?
 
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Northstar had chain driven dual overhead cams.
 
76zimmer said:
...but it wasn't a very mechanically reliable system for solenoid deactivation of the rocker arms on the center cylinders of each bank.
Click to expand...


Solenoid activation / deactivation is how I've heard of systems like this being proposed before actually. Seems like it will only be a matter of time before the old pushrod design motors will be phased out with something that is truly more cost effective and able to be mass produced efficiently. I'm sure that GM and Ford have all kinds of projects similar to this but they don't let their engineering secrets out of the bag for all of us to see.

Cool vid - thanks!
 
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