This is how Porsche's new SIX-STROKE engine works!

Every car engine, bar a few two-stroke outliers, have used the four-stroke engine cycle which was created back in the 1800s. Porsche is looking to shake things up and has recently filed a patent for a unique six-stroke engine, somehow adding strokes into what has been the staple for over 150 years. Mike attempts to explain the fundamental physics behind this new engine cycle, and why Porsche might be using it in their sportscars of the future.

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[TheSanpletext]

"How big engine is that"
"2.0L to 2.3L"
"Wait, which one?"
"Yes"

[Hostilenemy]

4 strokes is usually how long I last, not sure 6 strokes is useful for me.

[ronbaer]

Now that is going to be a unique sound

[retroarg]

i would be quaking in my boots rn if i were a porsche mechanic

[DBenz]

A rotating gear assembly on a rotating crank assembly....for each piston. Balancing and timing that would be a huge nightmare for mechanics/engine rebuilders.

[sanfordgfogg]

With the patent filing, they probably are making a jump on the EPA or equivalent agency requirements for allowable emissions, with the double burn, any left over fuel gets a post burn, as you said, replacing needs for maybe EGR valves and or Catalytic Converters. Not to mention how expensive in both waste and materials those CC's are.

[TimJones-yonu]

Yet another example from engineers of "just cause you can doesnt mean you should."

[johngrant]

Feel like the crank will be working hard and wearing fast

[FusionWOBA]

It would be crazy if they slaped a turbocharger on it aswell

[canineconsigliere]

Interesting stuff and great explanation. BTW, the valves in the animation to your left are moving in the wrong direction😮

[ads]

Porsche is first and foremost an engineering company!

[joelmurphy]

Effiency of this can not depend on exhaust port velocity to pull in a fresh charge. It simply will not make much additional power at low RPM without a blower. This is why naturally aspirated two strokes (ported cylinder) have to 'get on the pipe', and Detroit diesel two strokes use a blower to make their power at low RPM.

[marcpadilla]

Always wonderful to think what humans can do with raw materiels. Construct truly marvelous things.

[camjkerman]

So they found a way to make a compound engine that burns petrol. Hopefully this gets put into a car sooner rather than later, the potential of this needs to be explored. After all, just look at what compound engines did for ships 100+ years ago. Hell, the fastest steam train in the world had a compound engine.

[pfoutsmn]

Feels like efficiency at the cost of power reliability and simplicity.

[wowable]

This feels more like a second channel upload

[CaitSithDubh]

This was my nickname in freshman year.

[christophb]

This combution engine addict sees the silver lining!

[hedleypepper]

Nice idea and I can see it working on a one cylinder proofing concept but in a multi cylinder engine no chance. Especially as we're literally on the cusp of all electric.

[fascistpedant]

Let me know when they actually measure 50% thermal efficiency.