pre-ignitionn.
/ˌpriːɪɡˈnɪʃn/, U.S. /priɪɡˈnɪʃ(ə)n/ Premature combustion of the fuel-air mixture in an internal combustion engine.
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society > occupation and work > equipment > machine > machines which impart power > engine > internal-combustion engine > [noun] > ignition > types of
pre-ignition1898
auto-ignition1901
magneto ignition1902
tube-ignition1903
coil ignition1911
cold starting1930
compression-ignition1936
1898 A. G. Elliott tr. H. de Graffigny Gas & Petroleum Engines iv. 88 This third engine has a vaporizer which..is so constructed that even if it became red-hot there would be no risk of pre-ignition.
1909 Westm. Gaz. 1 Apr. 4/1 The compression has been increased to the highest point compatible with safety in regard to freedom from pre-ignition.
1951 ‘S. Abbey’ Automobile Fault-tracing ii. 28 Pre-ignition and auto-ignition differ from detonation in that the incoming charge is ignited by an incandescent particle or surface before the sparking plug fires.
1970 A.A. Bk. of Car 50 Pre-ignition, like knocking, can cause extensive damage, as well as reduce engine power.
1992 MotorHome Feb. 90/2 If any sign of engine ping or preignition occurs while traveling in Mexico, add the Moroso octane booster to help improve performance.
This entry has been updated (OED Third Edition, March 2007; most recently modified version published online March 2022).
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n.1898