Short Stroke Opposed Piston Diesel Engine

CAD Model of twostroke pulling rod opposed piston diesel engine, inspirated by the OPRE-Engine at

www.pattakon.com

The aim was a shorter engine and more lightweight pistons. But the webmaster himself says it cannot move. I try to find out why. do YOU have an idea?? plz comment!
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Stroke is 2x50mm, bore:80mm (same as OPRE), overall length including housing is 350mm.
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animation was made with unigraphics nx6 at darmstadt university, my skills are quite basic.

Category:

Science & Technology

Tags:

• opposed piston
• twostroke
• diesel
• pulling rod

[tomjjdd]

Take a look at  opposed piston engine low friction.

[io9487]

@tomjjdd

thanks for the video! It's basicly the same design. In my opinion the pistons assamblies are too heavy and complex to compete with other designs like the OPOC. Same problem with the PatOP engine.

Besides the conrod alignement, reducing friction is a great thing, but at the cost of greater piston weight, just like a crosshead.

Using four crankshafts would solve this ;)

[SlasherPay]

This type of engine may be able to run, however huge amount of mechanical stress (and loss) will be put on the con rod joint on the plates below the piston as well as those plates. Moreover, piston movement will become a lot heavier and sluggish, whereas its supposed to be as light and easy moving as possible.. Also, the two flywheels will need to be combined. Otherwise, nice design..

[SlasherPay]

this can be of your interest> youtube.com/watch?v=j53v75mJj_­4

[io9487]

@SlasherPay

I was already influenced by that design, and i'm in contact with the builder for over two years now.

[io9487]

@SlasherPay

Thanks for the comment!

I guess the forces on the conrod joints will try to turn it in its cylinder. More joints make more friction. Heavy crankshaft make bad acceleration. Maybe its only suitable for a range xtender application.

I abandonned the design, because it has no great advantages over the PatOP Engine.

[Squarerig]

Is this a modification of the Doxford marine engine?