射流控制压缩着火正时可控性试验  

Research on Controllability of Ignition Timing for a Jet Controlled Compression Ignition Engine

作　　者：田华 崔靖晨[1] 隆武强[1] 田江平[1] 礼博[1] 付垚 Tian Hua;Cui Jingchen;Long Wuqiang;Tian Jiangping;Li Bo;Fu Yao(Energy and Power Engineering School,Dalian University of Technology,Dalian 116024,China;National Engineering Research Center of Ship Building,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学能源与动力学院,辽宁大连116024 [2]大连理工大学船舶制造国家工程研究中心,辽宁大连116024

出　　处：《内燃机学报》2019年第6期514-521,共8页Transactions of Csice

基　　金：国家自然科学基金资助项目(51379034);工业和信息化部高技术船舶科研资助项目(工信部联装[2012]540)

摘　　要：预混合压燃发动机能够实现低PM、低NOx排放和高热效率,但着火正时的可靠控制仍是其应用的主要障碍.射流控制压燃(JCCI)通过点火室火焰射流控制主燃烧室着火正时,这种控制方式直接有效、环境适应性强.通过一台改装的重载发动机对JCCI工作过程进行了试验,验证了JCCI控制着火正时的原理,研究了点火室点火正时、进气温度和EGR率对JCCI工作过程的影响.结果表明:JCCI的主燃烧室着火直接受控于点火室点火;相同点火正时条件下,进气温度为60~80℃时的CA 10变化只有2°CA,因而着火正时控制鲁棒性好;加入EGR率能够降低JCCI燃烧速率和燃烧噪声,但会造成热效率降低以及HC和CO排放升高.Premixed compression ignition engine has low PM and NOx emissions and high thermal efficiency.However,reliable control of the ignition timing is still a main hurdle to practical use.Jet controlled compression ignition(JCCI)gives a more reliable and robust ignition timing control of the main combustion chamber by hot jet issued from the ignition chamber.Experimental research on JCCI operation process was performed on a modified heavy duty(HD)engine.The principle of ignition timing control by JCCI was verified,and effects of ignition chamber spark timing,intake temperature and EGR rate on the ignition timing were investigated.The results show that the main combustion chamber ignition timing is controlled directly by the ignition chamber spark timing,and the CA10 phase changes by only 2°CA with constant spark timing when intake temperatures change from 60℃to 80℃.The ignition timing control of JCCI is robust.EGR rate addition reduces the combustion velocity and combustion noise of JCCI,but leads to thermal efficiency loss and rate increase of HC and CO emissions.

关 键 词：柴油机 射流控制压燃 着火正时 控制鲁棒性 

分 类 号：TK421.2[动力工程及工程热物理—动力机械及工程]