Gasoline Engine Combustion: Shock-Wave or Expansion?

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SUMMARY

The discussion clarifies that in gasoline engines, combustion does not involve shock-waves but rather relies on the expansion of heated air. When gasoline combusts, it heats the compressed air, leading to an increase in pressure that pushes the piston down. This process is fundamental to the operation of gasoline engines, distinguishing them from diesel engines, which may involve shock-wave phenomena.

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alex1995x
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Hi all,

I was wondering if someone could please clarify the following for me. I read that in a gasoline engine there is no shock-wave in the detonation of gasoline. If there is no shock-wave, then how is the piston pushed down? Thanks in advance for the help

Alex
 
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I assume the combustion of fuel heats the compressed air, causing it to expand and push the piston down. That sound right?
 

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