Opposed Piston Engine with two cranks.

http://www.mekanizmalar.com/two_crank_opposed_piston_engine.html

Category:

Howto & Style

Tags:

• Engine
• Motor
• Diesel
• Piston
• Internal Combustion Engine
• Diesel Engine
• Two Stroke Engine

[P51ride]

This engine is designed to run on diesel fuel which generates more torque than a gasoline engine and at a lower RPM. The Fairbanks- Morse opposed piston 10 cylinder engine was used in World War II US Balao class submarines. The F-M engines only turned generators to charge batteries and provide power for the 4 electric motors that turned the props. For more info google fairbanks morse and Balao class submarines

[mekanizmalar]

@P51ride Thank you for your excellent info.

[cooey84]

if this is based on a FM engine, its wrong. the conecting rod on one side has to be a bit longer then the other, and when it fires the bottom piston is roughly at 1 o'clock.

[mekanizmalar]

@cooey84 Thanks for the info.

[mike000000000000able]

They used to run the pistons out of sink for exhaust; also making it difficult to balance and hurting reliability. Furthermore,one crankshaft powered the pumps and supercharger, and the other to powered the driveshaft.

I've long thought that the addition of some new tech would breath new life into this engine- I think it's well suited for LPG or CNG (with faster flame propagation, because this engine can go at a much higher RPM) and as a generator for electric vehicle it would be awesome!

[mekanizmalar]

@mike000000000000able Thank you for your nice explanation. 

[Usernameinvalid16]

The timing of each piston needs to be Slightly different. The piston on the left needs to go down First in order to remove the Exhaust.

[mekanizmalar]

@TheBerkeleyGang I think supercharger working just fine.

[kamphwagon1]

@Usernameinvalid16 Not exactly so the exhaust ports can be moved to the right in this video and acomplish the same thing , it's the port (s ) placement thats not proper for a 2 stroke engine the exhaust ports are always opened first with the piston uncovering them then the intake ports...Timeing the pistons to reach TDC at different intervals would reduce effecency requireing a longe stroke to compensate for lost compression as well..

[24preacherboy]

@TheBerkeleyGang

Nope thats the way they rotate.

[ghettoflyer]

What if the intake was on the top of the engine with exhaust on the bottom to get a more uniform fuel air charge. Also have the intake closer to TDC but leave the exhaust BDC like you have them creating a colder fuel air charge and working off the existing 2 cycle technology and would prevent potential over lap problems

[ChilesGreen]

Of course the two cranks must be interconnected to obtain synchronicity.