加载条件对柴油机瞬态响应的影响研究  

Effect of Loading Condition on Transient Response of Diesel Engine

作　　者：宋德祥 李志鹏 李睿[2] 石志勇 商显赫 张付军[1] SONG Dexiang;LI Zhipeng;LI Rui;SHI Zhiyong;SHANG Xianhe;ZHANG Fujun(Beijing Institute of Technology,Beijing 100081,China;China North Vehicle Institute,Beijing 100072,China;Shanxi Diesel Engine Industry Co.,Ltd.,Datong 037036,China)

机构地区：[1]北京理工大学,北京100081 [2]中国北方车辆研究所,北京100072 [3]山西柴油机工业有限公司,山西大同037036

出　　处：《车用发动机》2023年第1期6-12,共7页Vehicle Engine

摘　　要：应用GT-Power和Simulink软件建立了涡轮增压柴油机的动态模型和联合仿真平台,提出了“自然特性和恒转速”组合方式的测功机加载方式,对高原环境下柴油机瞬态过程进行模拟分析。通过不同的加载条件,分析了柴油机在加速过程中瞬态响应性差的影响因素,研究发现发动机转速和喷油量是影响涡轮增压器响应性的两个重要参数。先快速提升发动机转速,增加进气量,然后恒速加载能够克服增压器滞后现象,快速达到发动机的高负荷状态。应用这种仿真模拟方法,为车辆高原起步过程施加扭矩干预改变发动机运行工况,改善起步响应性提供依据。The dynamic model and joint simulation platform of turbocharged diesel engine was established by using GT-Power and Simulink software.The dynamometer loading mode of natural characteristics and constant speed combination was proposed to simulate and analyze the transient process of diesel engine in plateau environment.Through different loading conditions,the influencing factors of poor transient response of diesel engine during acceleration were analyzed.It was found that engine speed and fuel injection quantity were two important parameters affecting the response of turbocharger.By rapidly increasing the engine speed,increasing the air intake,and then loading at constant speed,the supercharger hysteresis could be overcome,and the high load state of engine hence can be quickly achieved.Accordingly,the simulation method could provide a reference for changing the engine operating conditions by torque intervention and improving the starting response of vehicle during the plateau starting process.

关 键 词：高原 柴油机 瞬态响应 涡轮增压 加载条件 

分 类 号：TK421.8[动力工程及工程热物理—动力机械及工程]