Detonation—sometimes called knock or pre-ignition—is a pinging sound that can sometimes be heard during acceleration and throttle tip-in. Unlike normal exhaust noise, detonation is a higher-pitched, raspy note that emanates from the engine compartment.
What is detonation caused by?
What Causes Detonation? The type of engine damage caused by detonation happens when a heat source within the combustion environment ignites the fuel/air charge prior to initiation by the engines ignition system.
Is knocking and detonation same?
“Knocking” and “detonation” are the interchangeable terms refers to the phenomenon of uncontrolled combustion in the IC engine. “Knock” is the sharp metal pinging sound produced in the engine due to uneven combustion. In general, detonation is the cause and knocking is the after effect.
What can cause engine detonation?
Detonation is generally caused by excessive heat, excessive cylinder pressure, improper ignition timing, inadequate fuel octane or a combination of these. Of the previous, excessive heat is usually the culprit. As an engine is modified to generate more power, additional heat is produced.