During rapid engine deceleration, which mechanism results from reduced torsional damping in crankshafts?

💡 Explanation

Torsional vibration issues increase in the crankshaft during abrupt deceleration; the *torsional resonance* is exacerbated because cylinder firing impulses cease abruptly. This causes high-stress fluctuations, therefore torsional fatigue cracking is more likely, rather than altered lubrication or valvetrain function.

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