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开发了一套基于电容放电的多脉冲点火系统,可实时调整点火间隔和点火次数;并在一台内部废气再循环(EGR)的汽油机上研究了多脉冲点火参数对火花助燃均质充量压缩着火(HCCI)燃烧过程的影响.研究结果表明:采用火花助燃方式,可以在可控自燃(CAI)不能稳定工作的边界工况区域实现稳定的稀薄燃烧;增加脉冲个数,可以缩短燃烧持续期,并提高平均指示压力,增幅达8%左右;增加脉冲间隔,也可以提高平均指示压力.
A multi-pulse ignition system based on capacitive discharge was developed to adjust the ignition interval and the number of ignitions in real time. In a gasoline engine with internal EGR, the effects of multi-pulse ignition parameters on the homogeneous charge of spark combustion (HCCI) combustion process.The results show that: with spark-assisted combustion mode, stable lean combustion can be achieved in the boundary conditions where CAI can not work stably; increasing the number of pulses can shorten the duration of combustion , And increase the average pressure on instructions, an increase of about 8%; increase the pulse interval, you can also increase the average indicated pressure.