Porsche patented a 6-stroke engine, yes, two more strokes than you’d commonly see for a combustion engine, and most excitingly, one of those additional strokes is a power-stroke! We now have two power strokes per cylinder within the full six-stroke cycle. The way it works is through Porsche’s genius hypocycloidal design which the crankshaft follows. This creates two different stopping heights for the piston at both the top, and the bottom of the cylinder. The first three strokes you’ve seen before, intake, compression, power, but at the end of our third stroke, the first power stroke, the piston drops a little bit further down, exposing air intake ports, filling the cylinder with fresh air. This is of course compressed on the next stroke, along with fuel, leading to the second power stroke, and finally ending with the exhaust stroke, before the cycle repeats. The advantage is greater power density, since you know have more frequent power strokes. The downside is, it’s just a patent, so much like my ambitions to learn how to read, it might not ever happen. Porsche 6-Stroke Full Explanation - https://youtu.be/aIveTlr3hv8 Subscribe to Engineering Explained for more videos! - https://goo.gl/VZstk7 Recommended Books & Car Products - http://amzn.to/2BrekJm Engineering Explained is a participant in the Amazon Influencer Program. Don't forget to check out my other pages below! Instagram: http://www.instagram.com/engineeringexplained Facebook: http://www.facebook.com/engineeringexplained EE Extra: https://www.youtube.com/channel/UCsrY4q8xGPJQbQ8HPQZn6iA
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6 strokes is all I need
Maybe they should invent a 2 stroke that has 50% more power density than this and similar emissions problems
A 6 stroke engine? 1 more and this could be named after my grandfather!
One of Porsche's engineers spent far too much time as a child playing with his Spirograph set! He noticed a typical four-stroke cycle and thought, "Wait a minute, I used to play this game!"
What we have done is made a 4 stroke with 2 stroke. I'm having a stroke reading this.
Not mentioned in the video, but the exhaust valve does of course open to let out the burnt gases after the first (and second) power stroke. If you're interesting in understanding this in much more detail, you can watch the long form version by hitting the little Play Button at the bottom of the video "Porsche's 6-Stroke Engine Is Genius!"
We are having 'stroke' whenever V.W. car group has a 'new' idea 😂
We need the engine simulator guy to give us an idea of what this engine would sound like
All I heard was this is going to be a nightmare once that engine ends up on the 2 hand market after the warranty expires.
One of Porsche's engineers spent way too much time as a kid playing with his Spirograph set! He saw a standard four stroke cycle and thought "Wait a minute, I used to play this game!"
This is actually genius. It's like EGR without the extra steps.
Vibrations on that are going to be *tricky* at high rpm
That's 65% more stroke per stroke! -Car Johnson
Whenever I see technical masterpiece like this, I always think on what will happen after 10 years, when the car is on the used market and a car mechanic tries to fix it....
Some patent filings seem like power plays. Pun unintended.
This is sick. I love automotive engineering like this
I love Andy Weir's *Project Hail Mary*.
So they also inject fuel after the 2nd intake stroke?
It’s pretty amazing how much you learned without being able to read. You’re ahead of your time as much of newer generations are trying to follow in your footsteps.
German engineers love complexity.