摘要
研究了影响电控喷油器流量特性的因素,推导出初始喷油脉宽的计算公式。针对燃油喷射过程中出现的非线性动态不稳定流动情况,将喷射的燃油简化为油柱的变速运动,结合不同工况不同阶段燃油喷射速度特性与阀杆组件运动之间的关系,建立了能较精确预测流量特性与初始喷油脉宽关系的电控喷油器数学模型。基于该模型,对某一汽油发动机电控燃油喷射系统进行了仿真,结果表明模型正确有效。
The factors influencing flow characteristics of electronically-controlled injector are studied and the calculation formulae of initial injection pulse-width are derived. In view of the situation of nonlinear unsteady flow in fuel injection process the injected fuel is simplified to a cylindrical fuel beam, and further considering the relation between the velocity characteristics of fuel injection and the movement of valve-stem component in different stages of different working conditions, a mathematics model for electronically-controlled injector is built, which can accurately predict the relationship between flow characteristics and initial injection pulse-width. Based on the model a simulation on the electronically-controlled injector of a gasoline engine is performed, and the results indicate that the model is correct and effective.
出处
《汽车工程》
EI
CSCD
北大核心
2009年第5期451-456,共6页
Automotive Engineering
基金
河北省教育厅自然科学研究指导项目(Z2007218)资助
关键词
电控喷油器
流量特性
仿真
喷油脉宽
electronically-controlled injector
flow characteristics
simulation
injection pulse-width
