电控单体泵系统喷射延迟特性研究  

Injection Delay Characteristics of an Electronically Controlled Unit Pump

作　　者：吴长水[1] 杨时威[2] 

机构地区：[1]上海工程技术大学汽车学院,上海201620 [2]上海交通大学机械工程与动力学院,上海200030

出　　处：《机械科学与技术》2010年第5期616-620,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：上海高校知识创新工程(085工程)建设项目(JZ0901)资助

摘　　要：燃油喷射系统延迟特性是影响电控柴油机精确正时控制的最重要因素,在EFS油泵试验台上研究了转速、喷油量这两个因素对燃油喷射系统延迟特性的影响,利用无交互双因素方差分析法对不同转速和喷油量下的起喷及停喷延迟时间样本值进行了方差分析。分别检验了转速和喷油量对喷射以及停喷延迟时间影响的显著性。结果表明:转速对起喷及停喷延迟时间的影响都非常显著,而喷油量只对停喷时间有显著影响。利用试验和方差分析结果对延迟时间补偿脉谱的标定方案进行了改进,简化了标定工作量。Injection delay characteristic of fuel injection system is the most important factors that affect the injection timing of an electronically controlled diesel engine.The effect of fuel delivery quantity and engine speed on fuel injection delay characteristics of electronic-controlled unit pump（EUP） was studied based on the electronic filling services（EFS） pump test bench.Non-interaction double factors variance analysis method is applied to the analysis of the effect of fuel delivery quantity and engine speed on fuel injection start and cease delay characteristics.The experiments and variance analysis indicate that the engine speed has significant effect on both injection start delay and cease delay,while the fuel delivery quantity only influences the injection cease delay.The design of injection delay map calibration is improved based on the experiment and variances analysis,which results in the simplification of the calibration.

关 键 词：电控单体泵 延迟特性 方差分析 脉谱标定 

分 类 号：U464[机械工程—车辆工程]