多脉冲点火天然气发动机的初步研究  

Preliminary Investigation on CNG Engine with Multi-pulse Ignition

作　　者：张德福[1] 张惠明[1] 孙文广[2] 张怀东[1] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室 [2]天津理工大学

出　　处：《汽车技术》2008年第8期13-16,共4页Automobile Technology

基　　金：国家自然科学基金项目(50276041);国家重点基础研究发展规划资助项目(2001CB209201)

摘　　要：针对稀燃天然气发动机正常燃烧所需点火能量高、低转速循环波动大的问题,设计开发了基于单片机控制的多脉冲电子点火系统,试验研究了采用多次点火与原单次点火对稀燃发动机怠速稳定性和燃烧过程的影响。结果表明,增加点火次数可提高点火能量,有利于促进火核的快速形成和发展,对减少失火和循环波动现象有利。To solve the problems of the excessive cyclic vibrations at low rotational speed and high ignition energy at normal combustion of lean burn CNG engine,a multi-pulse ignition system based on the single chip computer control was designed.A comparison was made between the multi-time ignition system and original single time ignition system to investigate the influence on the engine＇s combustion process and idle stability.Results show that increasing ignition times can increase ignition energy,is helpful for the flame kernel forming and developing, so that the reductions of the misfire and cyclic vibrations are achieved by adopting the multi-pulse ignition system.

关 键 词：天然气发动机 多脉冲点火 点火能量 

分 类 号：U464.174[机械工程—车辆工程]