某涡轮增压汽油机活塞漏气量的分析与优化  

Analysis and Optimizing of Piston Blow-by of Turbocharged Gasoline Engine

作　　者：石黄涛 曾明杰 李志敏 Shi Huangtao;Zeng Mingjie;Li Zhimin(Liuzhou Vocational&Technical College,Liuzhou 545000)

机构地区：[1]柳州职业技术学院,柳州545000

出　　处：《中国汽车》2024年第5期60-64,共5页China Auto

基　　金：柳州职业技术学院课题“基于SPH理论的车辆水管理仿真关键技术研究及应用”(编号:2023KB07)。

摘　　要：活塞漏气量大是困扰发动机的难题之一,高温、高压燃气如果大量泄露,往往会导致曲轴箱压力升高、机油消耗增加、发动机功率下降等一系列问题,所以发动机活塞漏气量是个不容轻视的问题。本文针对某1.8T涡轮增压发动机活塞漏气量超标的情况,分析了影响活塞漏气量的主要因素,并通过台架试验研究对比分析不同设计方案的活塞漏气量,确定了最终的优化方案,降低了活塞漏气量达到了优化目的。One of the challenges that troubles the development of the engine industry is the piston blow-by.If high-temperature and high-pressure gas leaks in large quantities,it often leads to a series of problems such as increased crankcase pressure,increased oil consumption,and decreased engine power.Therefore,piston blow-by in engines is a problem that cannot be underestimated.This article analyzes the main factors affecting piston blow-by in a certain 1.8T turbocharged engine,and compares and analyzes the piston blow-by of different design schemes through bench tests.The final optimization plan is determined to reduce the piston blow-by and achieve the optimization goal.

关 键 词：增压发动机 活塞漏气量 闭口间隙 缸孔变形 

分 类 号：TK4[动力工程及工程热物理—动力机械及工程]