多次预喷射的柴油机燃烧噪声控制实验  

Experimental on Combustion Noise Control of Diesel Engines Employing the Multiple Pilot Fuel Injection Technology

作　　者：姜顺超 张校峰 王晓洋 许杰 姜智超 JIANG Shunchao;ZHANG Xiaofeng;WANG Xiaoyang;XU Jie;JIANG Zhichao(Qingdao Haier Refrigerator Company Limited,Qingdao 266103,China;Guangxi Science&Technology Normal University,Laibin 546100,China)

机构地区：[1]青岛海尔电冰箱有限公司,山东青岛266103 [2]广西科技师范学院,广西来宾546100

出　　处：《汽车实用技术》2022年第24期103-109,共7页Automobile Applied Technology

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

摘　　要：为了降低柴油机怠速状态下的燃烧噪声,分析多次预喷射技术对燃烧噪声的影响。在半消声室内对某直列四缸高压共轨柴油机进行测试,根据实验数据,分析两次预喷射策略对缸压、放热率、压力升高率、燃烧噪声的影响。实验测试结果表明,两次预喷射策略可以有效降低柴油机的放热率及压升率的最高值,从而使柴油机燃烧噪声平均降低了5.2dB,实车噪声也有所减小,缸压频谱在中高频率范围内的幅值也有所减小,此预喷策略最终也应用在了某型号的柴油机上。In order to reduce combustion noise of diesel engine in idle state,a study on the effect of the multiple pilot fuel injection technology on the combustion noise was conducted. A four-cylinder high pressure common rail diesel engine with inline sensors was tested in a semi-anechoic room.According to the experimental data, the effects of the double pilot fuel injection technology on the cylinder pressure, the heat release rate,the pressure rise rate, the combustion noise were analyzed.The test results showed that the double pilot fuel injection technology can reduce the maximum value of the heat release rate and pressure rise rate of the diesel engine, so that the combustion noise of the diesel engine was reduced by an average of 5.2dB. The real vehicle noise was also reduced.The spectrum of the cylinder pressure decreased in the medium to high frequency range. This multiple pilot fuel injection technology was finally applied to this type of diesel engine.

关 键 词：柴油机怠速 预喷射 缸压 压升率 燃烧噪声 噪声控制 

分 类 号：TK4216[动力工程及工程热物理—动力机械及工程]