摩托车发动机VVT系统参数的设计与优化  

Design and Optimization of VVT System Parameters for Motorcycle Engine

作　　者：苏进辉[1] 张力[1] 苏伟 黄琪 文君竹 

机构地区：[1]重庆大学机械工程学院,重庆400030 [2]中国嘉陵工业集团,重庆400032

出　　处：《重庆大学学报（自然科学版）》2005年第4期19-22,共4页Journal of Chongqing University

基　　金：重庆市科技攻关重点项目(7823-2)

摘　　要：针对中小排量摩托车发动机的特点,研制了可切换双进气正时参数VVT系统。以发动机工作过程循环模拟为基础,通过嵌入VVT机构运行模式和控制策略的系统参数,分析了VVT结构参数、控制参数、以及相应运转参数对发动机性能的影响,对VVT系统高速和低速工况的进气迟闭角、气阀升程、切换转速等参数进行了优化设计。研究表明,在JH125摩托车发动机上装载所设计的可切换双进气正时参数VVT系统,可有效提高其整个转速工况范围的动力性指标。An original variable valve timing mechanism with two-mode intake timing was developed according to the structural characteristics of small medium displacement motorcycle engine. Based on cycle simulation, the effects of the VVT mechanism structural parameters, control parameters and operational parameters on the engine performance were analyzed by embedding the VVT mechanism operational mode and control strategies in the engine cycle simulation. Optimum design for the late intake valve closing, the valve lift, as well as the switching speed of the VVT system was carried out. It has been proved that power and torque of the JH125 motorcycle engine can be effectively improved by loading the new type VVT system.

关 键 词：摩托车发动机 可变配气正时 循环模拟 汽油机 

分 类 号：TK413[动力工程及工程热物理—动力机械及工程]