I wanted to know that what exactly is Knocking in an engine cylinder.

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    Cylinder Engine
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Discussion Overview

The discussion centers on the phenomenon of knocking in an engine cylinder, exploring its causes, implications, and the underlying processes. Participants seek to clarify the nature of knocking, its effects on engine performance, and the various factors that contribute to it.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant seeks a detailed explanation of knocking, indicating it is a fault but wanting to understand the process leading to it.
  • Another participant links to a Wikipedia article, suggesting it provides a comprehensive overview of the topic.
  • A different participant expresses a preference for personal explanations over external sources, indicating a desire for community insights.
  • One participant asserts that knocking is a form of detonation, describing it as a significant problem for engine longevity, attributing it to advanced ignition timing and overheating.
  • Another participant expands on the causes of knocking, mentioning mechanical faults, high boost pressure, charge air temperature, and fuel characteristics as contributing factors, while emphasizing that knocking is a primary limitation for spark ignition engines.

Areas of Agreement / Disagreement

The discussion reflects multiple competing views regarding the causes and implications of knocking, with no consensus reached on a singular explanation or understanding.

Contextual Notes

Participants mention various factors contributing to knocking, indicating a complexity in its causes that may depend on specific engine conditions and configurations.

cyborgyash
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I wanted to know that what exactly is Knocking in an engine cylinder. I know it's a kind of a fault. But how and whole process leading to it is, what i want to know.
Any reply will be well appreciated.

:D
Yash
 
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Thanks !
But, i was looking forward for some users self explained answer.
 


it is DETONATION...big time problem and not good for the life of the engine.It is caused by ignition timing being advanced too much, over heating which causes vapor lock..i blew up aqn engine once when towing the race car trailer due to this.
 


The Wikipedia article sums it up very well, I'm not sure why you need anyone here to type out the same information. Read it, digest it, and if you still have questions come back and you'll get the help you need.

It's not only caused by advanced ignition timing, but can be caused by a mechanical fault, high boost pressure, high charge air temperature, low/high air fuel ratio (depending on fuel type), fuel with inadequate knock resistance and a few other factors. It's also normally the primary limitation on the rating of a spark ignition engine.
 

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