Detonation Engine || Detonation in SI engine || Detonation and Knocking || Gear institute

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“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 is difference between detonation and knocking?
Knocking is the making sharp sounds due to uneven combustion of fuel in the cylinder of a vehicle engine. Detonation is the process of pre-ignition or auto-ignition of a fuel in an engine's combustion chamber

What is detonation of an engine?
Detonation is the abrupt combustion or explosion of the fuel charge inside the cylinder. ... In simplified terms, when detonation occurs, the fuel charge ignites quickly in an uncontrolled explosion, causing a pounding or hammering force on the piston rather than a steady push.

What causes detonation knock?
Answer: Detonation, or engine knock, occurs simply when fuel pre-ignites before the piston reaches scheduled spark ignition. ... Detonation is generally caused by excessive heat, excessive cylinder pressure, improper ignition timing, inadequate fuel octane or a combination of these.

Is knocking pre-ignition?
Pre-ignition (or preignition) in a spark-ignition engine is a technically different phenomenon from engine knocking, and describes the event wherein the air/fuel mixture in the cylinder ignites before the spark plug fires. ... Many engines have suffered such failure where improper fuel delivery is present

What is called knocking?
Knocking, in an internal-combustion engine, sharp sounds caused by premature combustion of part of the compressed air-fuel mixture in the cylinder. In a properly functioning engine, the charge burns with the flame front progressing smoothly from the point of ignition across the combustion chamber

Why do engines knock?
Knocking occurs when fuel burns unevenly in your engine's cylinders. When cylinders have the correct balance of air and fuel, fuel will burn in small, regulated pockets instead of all at once. ... Engine knocking happens when fuel burns unevenly and those shocks go off at the wrong time.


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