Mechanical Engineering - IC Engines and Nuclear Power Plants - Discussion

Discussion Forum : IC Engines and Nuclear Power Plants - Section 1 (Q.No. 38)
38.
The detonation is also called knocking or pinking.
Yes
No
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
4 comments Page 1 of 1.

Dwaipayan said:   7 years ago
Knocking is the premature ignition of fuel in fuel air mixture inside the SI engine cylinder due to overheating by the cylinder body and hight temperature rise due to adiabatic (and assumed reversible) compression. Detonation occurs in CI engines due to uneven mixing of injected fuel droplets into the hot compressed air. The flame front just below the injector collides with the flame from coming from the piston head (where temperature is maximum). Knocking is premature ignition whereas detonation occurs after injection.

Sriblessy said:   8 years ago
Knocking (also knock, detonation, spark knock, pinging or pinking) in spark-ignition internal combustion engines occurs when combustion of the air/fuel mixture in the cylinder does not start off correctly in response to ignition by the spark plug, but one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front.

Rahil said:   9 years ago
Yes you are right @Shrihari.

Shrihari said:   9 years ago
I think it will be No.

Knocking & Detonation is the two different phenomena.
The sound effect produced the knocking.
Vibration effect in the engine produced a detonation.
Both are different concept & cannot separate from each other.

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