This is pretty cool...

[Sarastro]

https://www.wimp.com/engineworks/

I wish they showed where it came from.

Some of the other videos on that site are nifty, too.

 

[Guest]

That is pretty cool. Not as much bang as I thought it would be.

 

[rick_ingram]

Isn't it missing its compression stroke?

Intake stroke when valve opens and allows fuel/air mixture to enter chamber.

Then should be the compression stroke, followed by the power stroke when combustion occurs.

Lastly the exhaust stroke.

Looks like the compression stroke has been edited out.

Still, a neat video, though!

 

[Banjo]

piston moves down, pulls in the air fuel mix on the (intake stroke)
intake valve closes
piston starts moving up compressing the fuel air mix (Compression stroke)
Piston almost at top, spark ignites the compressed mix
expanding gas sends the piston back down on the (power stroke)
when the piston is at the bottom, the exhaust valve opens
as the piston comes back to the top the spent gas is pushed out (Exhaust stroke)
All in the video.
The only thing it misses is showing the piston at the top between the exhaust and intake strokes.
remember a "stroke" is the piston moving one way.
Intake down,
compression up
power down
exhaust up

 

[TRDejaVu]

piston moves down, pulls in the air fuel mix on the (intake stroke)
intake valve closes
piston starts moving up compressing the fuel air mix (Compression stroke)
Piston almost at top, spark ignites the compressed mix
expanding gas sends the piston back down on the (power stroke)
when the piston is at the bottom, the exhaust valve opens
as the piston comes back to the top the spent gas is pushed out (Exhaust stroke)
All in the video.
The only thing it misses is showing the piston at the top between the exhaust and intake strokes.
remember a "stroke" is the piston moving one way.
Intake down,
compression up
power down
exhaust up

or for people in a hurry, Suck, Squeeze, Bang, Blow.

 

[Guest]

You're right Ben, it does skip overlap.

 

[Roger]

The last bit of the exhaust stroke is missing.

 

[Guest]

The last bit of the exhaust stroke is missing.

That's what Ben said too,