When does auto ignition and pre ignition occur?
When does auto ignition and pre ignition occur? The key point here is that auto-ignition occurs after normal combustion has been initiated with the spark plug. Pre-ignition is defined as the ignition of the mixture prior to the spark plug firing. Anytime something causes the mixture in the chamber to ignite prior to the spark plug event it is classified as pre-ignition. What's the difference between pre ignition and detonation? Pre-ignition:Pre-ignition is defined as the ignition of the mixture prior to the spark plug firing. Anytime something causes the mixture in the chamber to ignite priorto the spark plug event...