基于电液气门机构的汽油可控自燃试验的研究.pdfVIP

中国内燃机学会燃烧、节能、净化分会2008 年联合学术年会论文集 编号：0817 基于电液气门机构的汽油可控自燃试验研究 刘发发，王云开，洪忠超，谭满志，黄为钧，郭英男 （吉林大学 汽车工程学院，长春 130022） 摘要：在一台装备了自主研制的电液驱动无凸轮轴气门机构的进气道喷射单缸试验发动机 上，通过排气门早关、进气门晚开策略捕捉缸内热残余废气形成内部EGR ，实现了汽油机可 控自燃（CAI ）燃烧。试验探索了排气门早关、进气门晚开这种配气策略对汽油机CAI 燃烧 的影响。研究结果表明，采用自主研制的电液无凸轮轴气门机构能够实现低转速下的CAI 燃 烧，在排气门早关、进气门晚开这种配气策略中，内部 EGR 量取决于排气门关闭定时，进 气门开启定时的影响次之。在转速为1000r/min，过量空气系数（λ）为1 的工况下，在IVO 为 506-511°CA、EVC 为244-282 °CA 气门正时范围内实现了 CAI 燃烧。CAI 燃烧获得的 最大BMEP 可达0.395MPa 。 关键词：内部EGR; 可控自燃-CAI ；电液气门机构; 可变气门定时 Investigation on gasoline controlled auto ignition with Electro-hydraulic Valve Train LIU Fa-fa, GUO Ying-nan,Wang Yun-kai, TAN Manzhi,HUANG Wei-jun ，Hong Zhongchao （College of Automobile Engineering, JiLin University,Changchun,130022，China） Abstract: Controlled auto ignition (CAI) combustion was realized using late intake valve opening （LIVO) and early exhaust valve closing(EEVC) strategies to trap hot residual gas for CAI combustion in a PFI gasoline engine equipped with a new electro-hydraulic valve train. The effects of late intake valve opening and early exhaust valve closing strategies on the gasoline CAI combustion were experimentally investigated. The results show that CAI combustion can realized at low engine speed with electro- hydraulic valve train, with LIVO and EEVC strategies, the residual gas were determined by exhaust valve closing timing, and the influence of intake valve opening timing taken second place. When the IVO timing between 506 and 511 °CA, the EVC timing 244-282 °CA the gasoline CAI combustion was achieved at the engine speed of 1000r/min and the air/fuel equivalence ratio equal to 1, and the maximum BMEP reached 0.395 MPa. Key words ：Internal EGR ；Controlled Auto Ignition ；Elec