排气道废气再循环策略下实现汽油可控自燃的气门定时区域  

Test on valve timing region to realize gasoline controlled autoignition combustion under the strategy of exhaust gas recirculation in exhaust port

作　　者：程鹏[1,2] 李华[1,2] 王有坤[1,2] 池俊成[3] 李国[3] 郭英男[1,2] 庄宇华 

机构地区：[1]吉林大学汽车工程学院,长春130022 [2]吉林大学汽车仿真与控制国家重点实验室,长春130022 [3]中国人民解放军装甲兵技术学院车辆工程系,长春130052 [4]长春市热力(集团)有限责任公司,长春130031

出　　处：《吉林大学学报（工学版）》2011年第4期932-937,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：'973'国家重点基础研究发展规划项目(2007CB210004);吉林省科技发展计划项目(20090556)

摘　　要：在装备有电控液压驱动可变气门机构的单缸机试验系统上,研究了使用排气道废气再循环（EGR）策略实现汽油可控自燃（CAI）时,气门定时对汽油CAI的影响。试验结果表明,在转速1000 r/min、过量空气系数λ为1条件下,采用进气门开启定时不变时（IVO=40°CAATDC）排气门关闭定时,（EVC）在126-176°CA ATDC范围内能够实现汽油CAI;采用EVC定时不变（EVC=146°CA ATDC）时,IVO在28-60°CA ATDC范围内也能够实现汽油CAI。EVC对从排气道吸入的废气的影响要大于IVO。在能实现汽油CAI的气门定时区域内,IVO变化范围仅为45°CA,EVC变化范围可达120°CA。The effects of the valve timing on the gasoline controlled autoignition（CAI） combustion was investigated on a single-cylinder test engine system equipped with an electronic controlled hydraulic variable valve train system using the strategy of exhaust gas recirculation（EGR） in the exhaust port.The test results showed that at engine speed 1000 r/min,equivalent air-fuel ratio λ=1 and constant intake valve opening timing（IVO） 40 ℃A ATDC,the engine can work in CAI combustion mode with the exhaust valve closing timing（EVC） at 126~176 ℃A ATDC.When EVC=146 ℃A ATDC,the engine can work in CAI combustion mode with IVO at 28~60 ℃A ATDC.The impact of EVC on the exhaust gas quantity recirculated from the exhaust port was greater than that of IVO.In the operation region that the CAI combustion was realizable,the change range of IVO was only 45 ℃A,while the range of EVC might be up to 120 ℃A.

关 键 词：动力机械工程 汽油 可控自燃 排气道废气再循环 可变气门定时 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]