In this paper,the fact that the power of 12150L diesel engine increases and its acceleration deteri- orates after the prescriptive overhaul life is revealed,based on a olt of test data. The reasons are ini- tially investigated.

• 本文以大量试验为依据；揭示出12150L 柴油机在规定的大修期后；功率增加；但加速性变坏；并对其原因进行了初步探讨.