Quote:
Originally Posted by berettafan
yes. we had fuel and air in the cylinder as it compressed but it wasn't going to ignite under just the pressure so we injected more fuel and added a spark.
it this really a variable compression engine now?
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That is like asking if a thermonuclear bomb does not have a fusion reaction.
It is a dynamic variable compression in that the compression required to light off the majority of the chamber is higher than the fixed compression ratio of the piston motion.
Reaction one is used to create the conditions for reaction two.