pre-ignition

British  

/ ˌpriːɪɡˈnɪʃən /

noun

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

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Example Sentences

A big, blond fellow dressed in boots, homespun-looking trousers the color of red mud, a colorful blouse-like shirt with kerchief and, when he fires the cannon, a relatively fire-retardant wool shell jacket, Rollow told the group a story about a “pre-ignition” incident from long ago.

From Washington Times

That is a common compression ratio for an average motor, and is chosen because it is considered to be the best for maximum horse-power and in order that the compression pressure will not be so high as to cause pre-ignition.

From Project Gutenberg

To prevent troubles due to pre-ignition it is necessary that the combustion chamber be made so that there will be no roughness, sharp corners, or edges of metal which may remain incandescent when heated or which will serve to collect carbon deposits by providing a point of anchorage.

From Project Gutenberg

The only drawback to this system is that there is no absolute insurance that every particle of carbon will be removed, as small protruding particles may be left at points that the flame does not reach and cause pre-ignition and consequent pounding, even after the oxygen treatment.

From Project Gutenberg

For ordinary flying at altitudes of 5,000 to 6,000 feet, the motors are sent out with an aluminum liner, bolted between the cylinder and the crank-case in order to give a compression ratio which does not result in pre-ignition at a low altitude.

From Project Gutenberg