压电式喷油器结构参数对喷油特性影响的研究  

Effect of Piezoelectric Injector Structure Parameters on Fuel Injection Characteristics

作　　者：武美萍[1] 赵翊[1] 王称心[1] 

机构地区：[1]江南大学江苏省食品先进制造装备技术重点实验室,江苏无锡214122

出　　处：《机械设计与制造》2015年第2期122-125,共4页Machinery Design & Manufacture

基　　金：江苏省产学研前瞻性联合研究项目-高压共轨燃油喷射系统的喷射机理及性能分析研究(SBY201320293)

摘　　要：为研究喷油器关键结构参数对喷油规律的具体影响,采用GT-Fuel软件对高压共轨压电式喷油器进行了建模和仿真计算,研究了喷孔数、喷孔直径、针阀锥角、压力室容积等结构参数对喷油率和针阀升程的影响。分析结果表明:增加喷孔数或减小喷孔直径可以提高喷油压力和针阀响应速度,优化喷油率;增大针阀锥角可以优化喷油特性,但会产生较大压力波动;较小的压力室容积可产生预喷射现象,提高燃油燃烧稳定性。该研究为喷油器结构设计和优化提供了参考依据,具有较高推广和实用价值。To research the specific effect of injector structure parameters on the injection, the common-rail piezoelectric injector was modeled and simulating calculated with GT-Fuel software. Structure parameters effect on injection rate and needle lift were researched, including nozzle hole number, diameter, needle cone angle and sac volume. The analysis results showed that injection pressure and needle response speed were improved, fuel injection rate was optimized with the increasing nozzle hole number or the decreasing nozzle hole diameter. Increasing the needle cone angle can optimize the injection characteristics, but will have a greater pressure fluctuation. The smaller sac volume presents a phenomenon of pre injection, which improves fuel combustion stability. This study provides a reference for the design and optimization of fuel injector structure and has high value of popularization and practicability.

关 键 词：压电喷油器 GT-Fuel 结构参数 喷油率 针阀升程 仿真计算 

分 类 号：TH16[机械工程—机械制造及自动化] TK421.4[动力工程及工程热物理—动力机械及工程]