Porsche's New Six Stroke Engine

[Sedalia Dave]

 

  I see this being a big deal in the medium and heavy duty truck market.  Where the additional power can be taken advantage of.

 

 

Edited October 11, 2024 by Sedalia Dave

[Marshal Mo Hare, SASS #45984]

Cool if it’s durable.

[Blackwater 53393]

A lot of extra moving parts! A combination of typical four stroke engine and the Detroit style two stroke diesel designs with some Wankle mixed in!!

 

It’s got some potential if it can overcome several construction and materials issues!  

 

Lubrication will be complicated.

[Blackwater 53393]

Come to think of it, this will probably have to be built in sections like the Mazda, (Wankle rotary engine) which is assembled as a module and then “stacked” according to the amount of power required.

 

 The piston design issue described can be met with a different skirt configuration that covers only the portion of the cylinder that has the scavenge ports in it.

 

Secondary valving may be necessary, (more moving parts) and some form of supercharging, (this was mentioned) will likely be needed to clean up emissions and boost the performance of the second power stroke, (still more moving parts).

 

Whether all of this can overcome the “laws of diminishing returns” remains to be seen if it ever gets to the prototype stage.

[Colorado Coffinmaker]

 

PLUS ONE for Blackwater.  An interesting "concept".   Building and making it practical is a whole different ball game.

[Stump Water]

11 hours ago, Blackwater 53393 said:

Come to think of it, this will probably have to be built in sections like the Mazda, (Wankle rotary engine)

 

Whether all of this can overcome the “laws of diminishing returns” remains to be seen if it ever gets to the prototype stage.

 

11 hours ago, Blackwater 53393 said:

Lubrication will be complicated.

 

Pretty much my thoughts also.

[bgavin]

The gears will run in an oil bath which should extend longevity.

I do not see the downside of the apex seal problem of a wankle rotor operating in an elliptical orbit.

To my mind, this is a huge improvement for low RPM stroker motors for commercial use.
I am seriously impressed by the continuous innovation of German engineers.

 

[ edit ]

German engineering has been proven for a VERY long time.
Their hardware fromthe last two World Wars should be evidence of this.

The Wankle engine is a product of German engineering.
If Curtis-Wright had not bought the patents then shelved the engine until the patents expired, we might have seen far more development.

I figure the market Porsche is aiming for is the commercial diesel (another German invention) market.
They know the EU cannot outlaw ICE engines for commercial traffic, without starving to death.

 

Edited October 12, 2024 by bgavin

[Blackwater 53393]

Bath type oiling robs horsepower and limits rpm.  A spray oiling system for the planetary would be far more efficient and easily accomplished with proper oil flow through the crankshaft.  Engine science for the better part of a century has endeavored to get the oil reservoir AWAY from the reciprocating assembly in order to reduce crankcase turbulence and shear from fluid colliding with moving hardware.  Efficiency would be greatly reduced if the crankshaft and rods are constantly colliding with lubricants suspended in the turbulence created by the entire mass constantly whipping through an oil bath.

 

The worm gear on the outside of the sun gear would be fine in an oil bath since it doesn’t travel with the reciprocating mechanism or the planet gears and the sun gear is relatively stationary.

 

We’ve spent years and small fortunes getting and keeping suspended oil and oil reservoirs away from the crankshaft!!