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Irene 3 year s ago
I need so clarification here. I always thought piston engine need combustion on every stroke, but in the videos it shows combustion maybe every other or 4th stroke. Am i missing something here?
       
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Cole 3 year s ago
There are 4 strokes, 2 up and 2 down.
1 - air/fuel intake
2 - compression
3 - ignition/power
4 - exhaust
repeat many times.
       
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Alzada 3 year s ago
Simplified:
Suck
Squeeze
Bang
Blow

And lean burns hotter...
       
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Vanburen 3 year s ago
Irene, a 2 stroke (or cycle) engine does what you are thinking of- a power stroke every revolution of the crankshaft. Intake and exhaust are via ports in the sides of the cylinder. Lubricating oil is mixed with the fuel and is burned when the fuel is consumed.

What is depicted here is a 4 stroke (or cycle) engine which uses exhaust and intake valves, and a power (combustion) stroke occurs every other revolution of the crankshaft. Lubricating oil is not mixed with the fuel, the lubricating oil is in the crankcase.

2 stroke engines are less fuel efficient and pollute more, but have fewer parts and produce more power relative to the weight of the engine.
       
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For everyone else, just here for the basics;

I hope this gave you a basic once-over on how engine combustion works.

 

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4K High-Speed Camera Reveals The Inner Workings Of A Combustion Engine (15 gifs + 1 video)
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