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Topic Review (Newest First)
10-24-2012 03:18 PM
Originally Posted by Jon View Post
I haven't yet investigated this very much, I thought I would post it here to see what others think.

An inventor recently posted his new engine design on the Crankshaft Coalition forums.

I'm sure we have other guys who will know more about this type of design. Essentially, the camshaft and valves have been replaced with a second crankshaft and set of pistons.

There are plenty of diagrams on the site, plus information/history, etc. Here's the link:

I'm not sure about the performance/efficiency/feasibility, or the extent to which this has been designed in the past, but at very least, it's thought-provoking.
The Crankshaft Coalition page is here.
10-24-2012 02:21 AM
inventor Here, the photo of the engine and Abart, for those who have doubts about the hight engine of my..

01-31-2006 11:41 AM
joe350s10 yeah, cadillac has already moved the starter under the intake...yet still no cam-less engine. the starter idea is EXTREMELY stupid if you ask me, but some egghead designer who will never have to service one of those cars thought it was outstanding.

cadillac just has that POS northstar that always seems to develop an oil leak and need a lower crankcase reseal.
01-31-2006 05:28 AM
Rob Keller Dont get me wrong because I'm no "Techno geek" which means I know squat about computers{nothing bad being said about anyone but me!} LOL Ya I'm a Dumb arse.

but I remember reading a article [popular mechanics?]
about that solenoid Vs. cam shaft thing& that makes a lot of sense if the application can be cost & repair effective that I dusted off that file {in my head} I seem to want to say that it was a Cadillac Engine & they were going to move the started UNDER the intake! Thats why I remembered it Because I though that was really stupid

But {as much as I despise computers in cars} a solenoid valve train would be awesome @ the push of a button you could have a race cam & then got back to a economy street setting


01-30-2006 08:01 PM
joe350s10 well, that is a unique approach....but it would be ehll to kepp balanced. And then you have to consider weight issues...

the "Big 3" will probably never even consider that design. Why? because they already have plans to do away with camshafts by using electro magnets and thier main focus right now is on building hybrids. The EPA is really going to crack down on domestics pretty soon...especially since ther are sevral imports that are 0-emissions vehicles.

Basically, each valve would have a solenoid controlling it. The computer could then actually change the cam profile as easily as changing the injector pulses. it would be like having a multitude of cams for every driving condition. A really great idea...

BMW has already played with the idea and even put out a couple of prototypes...but the problem lies with the lifespan of the solendoids. all of the heat and vibration tends to kill them quickly. and they aren't cheap to replace.

supposedly GM will be releasing a prototype motor within the next 5 years.
My guess is it will be on a vette first.

I really hope they can make it work.
01-30-2006 04:41 PM
Rob Keller Yes !! I know
A lot of times you have to have a good vocabulary just to convey the engineering thoughts it makes it much more difficult

Maybe you should try your own thread on this?

I have some inventions I think would go real good but theft of my Ideas & un constructive criticism I can do with out ..compleatly

& its hard to say what kind of actual difficulties you might encounter going from paper to object.

But feel free to bounce ideas off my hard head anytime OK?

01-30-2006 08:51 AM
NXS I think the problem with the wankel is the emmisions as they must have oil on the apex seals or compression is lost and the seals burn up. I wish inventor or some other people would comment!
I've had this idea for 10 years now, just put it out there.
I've also been trying to figure out a simple full rotary engine with NO out of ballance parts, such as rod/pistons or offset rotors.
I have an idea, but i'm not sure enough to put it on the web, ya know?
01-29-2006 09:01 PM
Rob Keller OOOOOOOOOooooooooooooooooooooo
check this out...

what if the gasses came in @ a {close to} 90* angle & left on the opposite 90* angle & used a Wankel type of rotor to semi compress & time & regulate the amount of air fuel mixture???

01-29-2006 08:57 PM
Rob Keller I dident see the latest annimations before I posted..........

...Ya sneekin um in on me LOL

01-29-2006 08:55 PM
Rob Keller Well looks like we HIJACKED this thread LOL

What I'm saying is typically say a straight 6 intake is on one side exhaust on the other & with what I'm seeing right now is the ports are directly above the Cly if the ............ ball valve cam {for lack of anything else to call it}

If it Gas comes in on the side instead of the top then the Exhaust Ball cam might have to turn counter clockwise .............. but its hard to say from these simple animations{not that I could do better} trust me there

In curious about the flow of the gasses from the air fuel mixtures to the tail pipe.................................

Sorry if I'm not getting my point across I'm tiring thou

01-29-2006 08:35 PM
NXS Hey Rob, I'm not sure what you're asking on the exhaust. It could rotate either direction and it will be the same. I don't have anymore pics but i could probably modify these to add the rest if the head. Of course the will be of poor quality like these but you will be able to see more of how it works. The best parts are that the gasses have a nearly straight shot in and out of the chamber as far as power is concerned. There are ovliously none of the other problems associated with standard style cams like lobes going down, rpm limited due to mass of the parts.
In a smaller cc engine like a 600cc it is feasable that 18,000 rpm could be had with the right bottom end.. i'll see if I can easily modify the images later.
01-29-2006 03:09 PM
Rob Keller Sorry I meant to say got any more pictures meaning going into more detail.

Because I was wondering if the exhaust would have to counter rotate?
all depending on how it ports out

01-29-2006 03:03 PM
NXS Thanks Rob
Yes, it's like a water faucet. and what do you mean, got any more? you mean designs or..?
and anybody else see any reason this won't work?
01-28-2006 08:23 PM
Rob Keller Interesting .
So your "valve train works like a ball socket valve in a {like}a water hose shut off?

you have more?

Hey you animation got the point across better than I could do...yest

01-28-2006 07:47 PM
NXS That's right Poncho, it would be much more efficient with a simple ROTARY supercharger {roots or turbine}. it is the acceleration to 100 mph, stop and re-accelerate to 100 mph thousands of times per second that takes energy, and gobs of it.

I, Nisan Catron , have invented a simple, yet highly effective ROTARY valve engine. It uses an odd shaped piston with two rods and long rotary valves. The pistons can be of a standard shape, but is most effective in this configuration{twin rod}. To make the most of the crankshaft journals a flat engine such as a Subaru or Porsche is best but a standard V engine is not a problem.

In my cr@ppy animation below you can see it working (the intake cam is advanced 15* to many in the animation, but you will see the idea).

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