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View Full Version : opposed piston, opposed cylinder?

silver_echo
10-31-2011, 01:54 AM
hey CTScott, take a look at this.

anybody else heard about this? looks like it will make a great engine design.


http://www.ecomotors.com/
Stove
10-31-2011, 02:50 AM
I'm sure it's a a lot more efficient with modern fuel injection and computers to control timing but its not a new design. The opposed piston engine has been around since the early 1900's
silver_echo
10-31-2011, 03:15 AM
yes, the opposed piston has been around, and the opposed cylinder is in my current car(subaru), but have there been cars with both?
ilikerice
10-31-2011, 05:55 AM
if you look a the design this is not your standard boxer engine. its 2 pistons pushing on each other. There is no "head", kinda weird setup. Looks PAINFUL to work on. I'm curious to see this in action
SilverBack
10-31-2011, 03:17 PM
Am I the only one that sees an intake but no header? Or is just that the header is off to the side so it disappears in the cut-away?
why?
10-31-2011, 04:12 PM
I almost feel bad for people like this. Their have been so many of these types of engines that have simply vanished, either because they were horrific or someone bought the patents to kill it.
yaris2010RS
10-31-2011, 08:57 PM
i like it
Stove
10-31-2011, 10:37 PM
yes, the opposed piston has been around, and the opposed cylinder is in my current car(subaru), but have there been cars with both?

There was aircraft with opposed piston used in WWII, that's where I knew of it from. I don't know of any cars that have utilized it.
The opposed cylinder (boxer) has been in common use in automotive and aircraft since at least the 1930's.
thepartsmancometh
10-31-2011, 10:40 PM
prepare for your mind to be blown.

If you want crazy, look up the napier deltic. They used them in diesel locomotives in the UK.

animation (http://pigeonsnest.co.uk/stuff/deltic/napier_deltic_animation.gif)
Stove
10-31-2011, 10:54 PM
prepare for your mind to be blown.

If you want crazy, look up the napier deltic. They used them in diesel locomotives in the UK.

animation (http://pigeonsnest.co.uk/stuff/deltic/napier_deltic_animation.gif)

:eek: Whenever I see stuff like that, all I can think of is how much work it must be to troubleshoot issues.

I think the craziest one I know is the Gnome Radial Aircraft Engine. The crank was the mounting point to the air frame and the engine case spun with the prop mounted to it

Gnome Engine (http://youtu.be/Nk9Dl6RZxmQ)
engine starts at about 1:30 in to it
mr_miles
10-31-2011, 11:56 PM
usually all you have to do to stump someone these days is say RX7. lol. Magical spinning triangles, etc.
TLyttle
11-01-2011, 12:27 AM
Good ol' rotaries... when you look at it, they were quite efficient. The Wankel, on the other hand, was a real bag of snakes, but one must admire Mazda for pursuing the design.

Many German aircraft ran a Junkers Jumo double-opposed diesel for power... Let's complicate things here: two cranks, 12 pistons, no cylinder head. They were used in flying boats, and one really doesn't want an unreliable engine in that application!