双线圈点火系统特性仿真与试验研究  

Simulation and experimental research on a dual-coil ignition system

作　　者：马修真[1] 靖海国[1] 杨立平 宋恩哲[1] 

机构地区：[1]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2014年第9期1124-1128,共5页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51306041);中央高校基本科研基金资助项目(002030020803;HEUCFR1008);黑龙江省自然科学基金资助项目(QC2013C057)

摘　　要：为了降低稀燃CNG发动机燃烧循环变动,设计了一种双线圈点火系统。利用Multisim软件仿真研究了新点火系统次级电压的变化规律,并在发动机台架上研究了此点火系统对CNG发动机燃烧稳定性的影响。次级电压的仿真结果表明,在不同放电间隔的条件下,新点火系统分别能够有效提高次级电压,增加火花持续期并能实现多次放电。台架试验表明,在合适的放电模式下新点火系统能够降低发动机的循环变动系数,提高稀燃CNG发动机燃烧稳定性。In order to reduce cyclic variation, a dual-coil ignition system for a CNG engine was proposed in this paper. Using Multisim software, the change rule of secondary voltage of the new ignition system was studied. The impact of this ignition system on combustion stability of the CNG engine was studied on the engine test bench. Experimental results of secondary voltage show that compared with single-coil ignition, the new ignition system can effectively increase secondary voltage, extend spark duration and achieve multiple discharges under different discharge interval conditions. Bench test shows that, in a suitable discharging mode, this system can reduce the probability of misfire and the cyclic variation coefficient of CNG engine, consequently it improves the combustion stability of lean burn CNG engine.

关 键 词：循环变动 双线圈点火系统 次级电压 火花持续期 多次放电 循环变动系数 

分 类 号：TK413.9[动力工程及工程热物理—动力机械及工程]