姜晓东，黄大勇

（上海普安柴油机有限公司，上海 200444）

摘要：活塞冷却喷嘴做为发动机内腔的重要部件，它的质量好坏直接影响到发动机的试验性能。本文从实际入手，针对市场反馈发生“拉缸”的问题，直接导致的原因是活塞冷却喷嘴的质量不过关。通过对其材料、结构的分析以及大量的工艺试验，提出设计改进方案，从而有效地解决了发动机拉缸问题。

关键词：活塞冷却喷嘴；强制冷却；结构改进

Abstract:The cooling nozzle of piston as an important part of diesel engine inner cavity, its quality directly affect the engine performance test, this article obtains from the actual, according to "scuffing of cylinder bore " from the market feedback, The immediate cause is the cooling nozzle of piston, through the analysis of its material, structure, and a lot of process test, put forward design improvements, so as to effectively solve the problem of the “scuffing of cylinder bore”.

Key words: Cooling Nozzle of Piston ;Forced Cooling; Structure Improvement