Stumbled on this and thought it was a neat design... Thoughts?
New engine design - 500cc / 120 HP / Modified 2 Stroke
- Thread starter StevieC
- Start date
Ran out of time to watch the whole thing. Seems like it would have a similar problem to a Wankel. Unburned fuel sneaking out the exhaust or poor scavenging of the chamber. Seems like a turbo/blower could solve some of that.
Disregard
That looks like a small centrifugal blower they've tacked on to their Miata test car.
Disregard
That looks like a small centrifugal blower they've tacked on to their Miata test car.
Axial cam engines have been around for a very long time. One or two are even FAA certified for aircraft use. Additionally, opposed piston designs are well known and used in various applications, from trucks to submarines, to locomotives.
These variations on a theme "type" engines do work, and they can be useful. However, there are very few of these that are truly "better" than a conventional 4 stroke engine. There is always the problem of heat transfer in energy dense configurations.
Furthermore, piston ring swept area (translate: friction) is the number 1 measure of comparable engine efficiency. A large cylinder has less surface area for rings to "Sweep" vs, multiple small cylinders. This means, a large, slow turning engine is always more efficient. Nor does that large, slow turning engine have to be heavy. Parts can be quite light and power to weight, excellent.
The "antiquated" 215HP, lightweight engine below is as efficient as a modern Prius. This is intentional, and the methods well understood from the 1930's on.
These variations on a theme "type" engines do work, and they can be useful. However, there are very few of these that are truly "better" than a conventional 4 stroke engine. There is always the problem of heat transfer in energy dense configurations.
Furthermore, piston ring swept area (translate: friction) is the number 1 measure of comparable engine efficiency. A large cylinder has less surface area for rings to "Sweep" vs, multiple small cylinders. This means, a large, slow turning engine is always more efficient. Nor does that large, slow turning engine have to be heavy. Parts can be quite light and power to weight, excellent.
The "antiquated" 215HP, lightweight engine below is as efficient as a modern Prius. This is intentional, and the methods well understood from the 1930's on.
The Dyna-Cam aviation engine:
It is a bit more "intelligent" in it's design. With the pistons not being opposed, but integral.
It is a bit more "intelligent" in it's design. With the pistons not being opposed, but integral.
This and the one I posted above kind of made me thing of an Air Conditioning Compressor I had seen an autopsy of. But I hadn't seen it used in a combustion engine setup.
Coming to a Ford near you... The 0.3L EcoBoost. No Wet timing belt needed! 
