This is scarin the hell outta me

[fcdriver]

Originally Posted by badassfocus1101

not to be a dick...but its INTAKE,COMPRESSION,IGNITION,COMBUSTION,EXHAUST...

Quit picking on my spelling!!

Ignition and combustion are lumped together in the power stroke since they basically are instantanious(sp?) but that's just terminoligy I was taught way back when.

In essance a 2 stroke piston engine uses the same basic terminoligy to define the cycle even though it only takes an upward and downward stroke to include all intake, compression, power(ignition, combustion) and exhaust.

I realize that a rotary is very simular to a 2stroke piston engine in this way but I was just in a piss poor mood when I read this and was doing the best I could to contain myself from exploding.

[mwolvin]

If you really want to get technical, you could call the rotary a one cycle because it does all five events in one (wobbly) motion. Why are we trying to compare the rotary to a piston anyway!?!?!?

just my

[drftk1d]

uhm its a 4 stroke

end of story.

[FDTT]

Originally Posted by drftk1d

uhm its a 4 stroke

end of story.

You are correct, a rotary is a 4 stroke engine. But very similar to a 2 storke in many ways.

[drftk1d]

yeah i can see the similarities, but you cannot say the engine isnt a 4 stroke (as someone did on the last page)

[Chris V]

Originally Posted by drftk1d

yeah i can see the similarities, but you cannot say the engine isnt a 4 stroke (as someone did on the last page)

Sure you can, as it really doesn't ahve any strokes or separate cycles. You could say that a 2 stroke engine is really a 4 stroke using your logic..

The rotary doesn't have valves opening and closing, either. A 2 stroke engine doesn't have valves opening and closing. Both use oil in the combustion chamber to lubricate the compression device. OTOH, a 2 stroke and 4 stroke pisten engines both use pistons, rods, and similar cranks, none of which a rotary has.

[mwolvin]

Not to mention that "stroke" is used to describe the up or down movement of a piston.

[Dick Wolf]

Calm down everyone, it is a 4 stroke and very similar to what a piston engine does. I just dont get this. How the hell noone thought of using this geometry before what, 1965?

[drftk1d]

Originally Posted by Chris V

Sure you can, as it really doesn't ahve any strokes or separate cycles. You could say that a 2 stroke engine is really a 4 stroke using your logic..

The rotary doesn't have valves opening and closing, either. A 2 stroke engine doesn't have valves opening and closing. Both use oil in the combustion chamber to lubricate the compression device. OTOH, a 2 stroke and 4 stroke pisten engines both use pistons, rods, and similar cranks, none of which a rotary has.

show me then, because every illustration or open engine ive seen has different cycles, they just happen simutaneously.

if you look at one combustion "chamber", you can see it goes thru four cycles

[mwolvin]

On a two stroke engine, the intake and power cycles occur simultaneously, as does the compression and exhaust.

I guess it all depends on your point of view. I do not think 4 stroke or 2 stroke describes a rotary. It (rotary) is in a category all by itself.

[fcdriver]

You need to think internally to grasp what is going on here.

On a four stroke engine you have cam(s) that open valve(s) that allows for a suction to draw an intake charge down into the combustion chamber as the piston moves down with the intake valve(s) open, that's the intake stroke. On a two stroke engine there is a port below the piston skirt which allows air to be drawn in when the piston moves upwards creating a yet another type of suction, this is the intake stroke.

On a four stroke engine the cam(s) rotate and allow the valve(s) to close starting the compression stroke. On a two stroke enging the piston moves upwards beyond the intake port which is no lower then the piston head and nearer the skirt allowing for the compression stroke.

On a four stroke engine at tdc the spark plug will fire igniting the compressed intake charge allowing for combustion and this is the power stroke (which pushes the piston down which moves the flywheel/flexplate. On a two stroke engine the high compression forces the intake charge so close together it self ignites and this is the power charge, are you still with me here?

Now for the fourth and final stroke/cycle, on a four stroke engine the cam(s) turn yet again opening the exhaust valve(s) and the piston is now coming up again pushing the exhaust gas out of the combustion chamber through the exhaust vavle(s) port. It's the same basic principle on a two stroke engine minus the valves and even with our rotaries since they all three have to have these four basic strokes to function, you may not want to call these processes(sp?) cylces or strokes but they are.

If there you think there is any other way of putting it please speak up because there are thousands of us out here seeing the exact same thing and I know I for one would like to see an argument that could disprove the basic operating functions of an internal combustion engine.