柴油机怠速进气量对燃烧噪声影响的试验研究  

Experimental study of air inflow on combustion noise of diesel engine in idle condition

作　　者：姜智超 姜顺超 郑长亮 甄龙信[4] JIANG Zhichao;JIANG Shunchao;ZHENG Changliang;ZHEN Longxin(College of Vocational and Technical Education,Guangxi Science&Technology Normal University,Laibin 546100,China;Qingdao Haier Refrigerator Co.,Ltd.,Qingdao 266103,China;Great Wall Motor Company Limited,Baoding 071000,China;College of Vehicles and Energy,Yanshan University,Qinhuangdao 066000,China)

机构地区：[1]广西科技师范学院职业技术教育学院,广西来宾546100 [2]青岛海尔电冰箱有限公司,山东青岛266103 [3]长城汽车股份有限公司,河北保定071000 [4]燕山大学车辆与能源学院,河北秦皇岛066000

出　　处：《内燃机与动力装置》2022年第4期14-18,共5页Internal Combustion Engine & Powerplant

基　　金：广西高校中青年教师科研基础能力提升项目(2020KY23017);广西科技师范学院科研基金项目(GXKS2020QN030)。

摘　　要：为了降低怠速工况下柴油机的燃烧噪声,针对怠速进气量(节气门开度)对柴油机燃烧噪声和整机1 m噪声的影响进行试验研究,分析节气门开度对缸压、压力升高率(简称压升率)、机体燃烧噪声、整机1 m平均噪声及转速波动的影响。结果表明:节气门开度减小时,缸压及压升率随之降低,特别是压升率降低较为明显,燃烧噪声和整机1 m噪声均明显降低;节气门开度低于5%时,柴油机的转速产生了明显的波动,导致怠速不稳定。In order to reduce the combustion noise of diesel engine under idle condition,the influence of idle air intake(throttle opening)on the combustion noise of diesel engine and the 1 m noise of the whole engine is experimentally studied.The influence of throttle opening on cylinder pressure,pressure rise rate,combustion noise,1 m average noise of the whole engine and speed fluctuation are analyzed.The results show that when the throttle opening is reduced,the cylinder pressure and pressure rise rate also decrease,especially the pressure rise rate decreases significantly,and the combustion noise and 1 m noise of the whole engine also decrease significantly;when the throttle opening is less than 5%,the speed of the diesel engine fluctuates significantly,resulting in unstable idle speed.

关 键 词：进气量 节气门开度 燃烧噪声 压升率 转速波动 

分 类 号：TK421.6[动力工程及工程热物理—动力机械及工程]