Definition of pre-ignition in English:

pre-ignition

noun priːɪɡˈnɪʃ(ə)n

mass noun

单词	pre-ignition
释义	Definition of pre-ignition in English: pre-ignition noun priːɪɡˈnɪʃ(ə)n mass noun The premature combustion of the fuel–air mixture in an internal combustion engine. （内燃机）提前点火，预燃 Example sentencesExamples High-octane fuel simply allows the higher pressures and temperatures in these high-output engines by preventing pre-ignition. To run an engine on unleaded fuel it may be necessary to retard the initial timing to prevent detonation and/or pre-ignition. Early ignition or runaway pre-ignition causes higher combustion chamber temperatures that can wreck the engine.
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