Automotive Dictionary: Knock, Combustion

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Automotive Dictionary: Knock, Combustion


Throughout this site we use many technical terms, and given the breadth of readership our site enjoys, sometimes we are remiss and incorrectly assume everyone knows what we are referring to. For those that do not, here are some explanations of the technical terms use.
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Knock, Combustion


Detonation on petrol engines, caused by rapid combustion of the end gases in the combustion chamber accompanied by high frequency pressure waves impinging on the cylinder walls to produce a knocking sound. It usually occurs during heavy loading�for example, when the throttle is fully opened.
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