多次喷射下喷油器结构参数对喷油量波动影响  

Influence of injector structure parameters on fuel injection quantity fluctuation under multiple injections

作　　者：杨津韬 张恒 赵建辉[1] 马尔可夫·弗拉基米尔 雷奥尼德·格列霍夫 YANG Jintao;ZHANG Heng;ZHAO Jianhui;MARKOV·Vladimir;GREKHOV·Leonid(School of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China;Department of Piston Engines,Bauman Moscow State Technical University,Moscow 105005,Russia)

机构地区：[1]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001 [2]莫斯科鲍曼国立技术大学动力工程学院,俄罗斯莫斯科115569

出　　处：《哈尔滨工程大学学报》2025年第2期276-282,共7页Journal of Harbin Engineering University

基　　金：国家重点研发计划政府间创新合作项目(2021YFE0114600)。

摘　　要：针对柴油机在多次喷射情况下喷油量波动对工作性能的影响,本文研究了喷油量波动的机制及其关键影响因素。本文通过建立共轨喷油器AMESim仿真模型,利用喷油规律和压力波动实验数据完成了仿真模型的校核验证,开展了关键结构参数对主喷油量影响的理论研究。结果表明:高压油管长度和内径的变化是主喷油量波动的显著影响因素,且喷油量波动主要发生在预-主喷策略下的主喷阶段;针阀升程的增加会增大主喷油量,但其增幅随升程的增加而减小;喷孔直径的变化直接影响主喷油量的波动,但其对预喷引起的压力波动影响较小;OA和OZ孔直径的变化对预喷阶段的压力波动产生明显影响,进而影响预喷阶段的喷油量,并主要体现在喷油速率上升阶段。To investigate the influence of fuel injection quantity fluctuations on the performance of diesel engines under multi-injection conditions,this study aims to investigate the mechanisms and key influencing factors of these fluctuations.An AMESim simulation model of a common rail fuel injector was established and validated using experimental data on fuel injection patterns and pressure fluctuations.Theoretical studies were conducted to examine the influence of key structural parameters on the main fuel injection quantity.The results indicate that the length and inner diameter of the high-pressure oil pipe are significant factors influencing fluctuations in the main fuel injection quantity,with these fluctuations mainly occurring during the main injection stage of the premain injection strategy.An increase in the needle valve lift leads to a higher main fuel injection quantity.However,this increase decreases as the lift increases.While the nozzle diameter directly affects fluctuations in the main fuel injection quantity,its influence on pressure fluctuations caused by pre-injection is minimal.Changes in the diameters of the OA and OZ holes significantly influence pressure fluctuations during the pre-injection stage,which in turn affects the fuel injection quantity,especially during the rising stage of fuel injection rate.

关 键 词：喷油量波动 压力波动 多次喷射 关键结构参数 高压共轨系统 动态喷射模型 AMESIM仿真 柴油机 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]