Air compressor to gas engine

Pretty sure they have a type of reed valve meant for the air they compress but it’s like a disc from what I saw, but different designs too interesting. They aren’t the conventional solid valve with the 4 strokes.
0063415A-74FC-43BF-B3B7-D92249A9252F.jpeg
C12D7349-340B-4BC2-9DF7-7EF7D4AA3C34.jpeg
415F3FA1-AC4E-4260-8E43-9AB7465F653B.jpeg
 
Why the pushrods? From what I cann tell, the compressor already comes with valves in place. I wonder if I can get away with using those.

No, because of the way an engine works as opposed to a compressor.

An air compressor builds pressure in the tank. The cylinder is just a pump to move air into the tank. Compressor valves are merely one-way valves that keep the air moving the right way. At no point in the compressor's cycle is there enough pressure in the cylinder to enable combustion, and if there was, the ignition event would open the exhaust valve. Disconnect the tank and the compressor isn't a compressor anymore, it just moves air from one side of the room to the other, like a very noisy fan.

4-cycle engine works this way:
Intake: piston moves down with intake valve open, cylinder fills. OK, this part works with compressor parts. Not optimally, but it works.
Compression: Piston moves up, both valves closed. Not how a compressor works. As a compressor's piston moves up, the intake valve closes and the exhaust valve opens, letting air into the tank. There is no cam to do this, they're just spring-loaded reed valves. Without compression in the cylinder you don't get...
Ignition: Spark ignites air/fuel mixture, both valves remain closed. See paragraph above. Also, you need to put a spark plug in there, as well as a way to fire it. Will the reed valves take the heat of combustion? No, they will not.
Exhaust: Valve opens, piston moves up to expel the gas. A compressor does this.

So of the 4 cycles, a compressor can do two of them.
 
Somewhere someone took a compressor, put a carb on one cylinder, ( V-twin ) pushed gas to the second cylinder, with a spark plug in it. And actually made a engine, it ran good and was mounted on a bike. Was posted on here or the other forum, may even be on U-tube..............Curt
 
Somewhere someone took a compressor, put a carb on one cylinder, ( V-twin ) pushed gas to the second cylinder, with a spark plug in it. And actually made a engine, it ran good and was mounted on a bike. Was posted on here or the other forum, may even be on U-tube..............Curt
I'll take a look around. Think you might know the title?
 
So let’s get this straight it was a vtwin that only fires on one cylinder? Sounds inefficient to me. With more modification it should be able to run on both, guy was probably lazy. You have almost twice the weight with the extra cast iron cylinder and piston. It was like a poor mans fuel injection from what I’m hearing. One cylinder would push gas into the other?
 
Sorry been a while that i seen it. Just know it worked, sounded kool, be sorta like a old Briggs thump-er. Couldn't be to lazy as he built it, LOL, would think be more fun doing this then just slapping a engine on a bike, and try to see how fast you can go. Experimentation is what got the Model T to were it is today,LOL.............Curt
 
Gues what i found while snooping................Curt


Curt, I've spent at least 3 hours pouring over that video and his literature, but i can't seem to grasp everything about this engine. It seems somewhat easy enough if i understand it properly, but i feel like I'm missing something crucial. From what i can see it's essentially a stock compressor with a hole bored into one of the cylinder heads for a spark, a magneto attached somewhere and a carb that runs to the cylinder with the spark. And for charging purposes, a pipe that runs between both cylinders. What else am i missing here?
 
Last edited:
Back
Top