Which risk is amplified when an internal combustion engine direct fuel injector's spray pattern becomes excessively narrow?

💡 Explanation

When a direct injector spray becomes too narrow, fuel concentrates on a small area because poor fuel atomization prevents effective heat extraction, thus increasing localized piston crown temperatures. High localized surface temperatures increases risk of pre-ignition/detonation, rather than overall backpressure, converter inefficiency, or bearing wear which would affect larger engine areas.

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