pre-ignition

British

/ ˌpriːɪɡˈnɪʃən /

noun

ignition of all or part of the explosive charge in an internal-combustion engine before the exact instant necessary for correct operation

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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pre-ignition

Today, ethanol is often added to petrol to prevent pre-ignition, or “knocking.”

From Nature ● Jun. 22, 2011

It has been found necessary to develop special types of pistons to carry the heat from the center of the head in order to prevent pre-ignition.

From Aviation Engines Design?Construction?Operation and Repair by Victor Wilfred Pag?

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023