进气压力对汽油低温压燃的影响  

Effects of the Intake Pressure on Gasoline Low Temperature Compression Ignition

作　　者：张翔宇 郑尊清[2] 黄树和[1] 李研芳 祝宇轩 尧命发 

机构地区：[1]中国北方发动机研究所,天津300405 [2]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《内燃机工程》2018年第1期1-7,共7页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金项目(51576138);天津市人才发展特殊支持计划

摘　　要：在一台装有电液可变气门的单缸柴油机上,通过改变进气压力,研究了不同喷油正时和内部废气再循环(EGR)率下汽油压燃的燃烧特性和排放特性,并对实现汽油燃料高效清洁稳定低温燃烧(如平均指示压力循环波动系数<5%,NOx排放低于0.4g/(kW·h),烟度低于0.1FSN,CO和HC排放尽可能低)的控制区间进行了探索研究。内部EGR通过排气门两次开启实现,发动机转速和循环喷油量分别固定为1 500r/min和28mg。研究结果表明,基于燃油早喷、较低内部EGR率和适量进气压力(0.12MPa)的协同控制可以使辛烷值为93的汽油在平均指示压力约为0.47MPa的工况下实现高效清洁燃烧。The gasoline compression ignition combustion and emissions characteristics at different injection timings and internal exhaust gas recirculation （EGR） rates were investigated by changing thsingle-cylinder diesel engine equipped with a electrohydraulic variable valve actuator system. The control area for the gasoline engine to achieve high-efficient,clean and stable low temperature combustion （i. e., CO0. 4 g/（kW ＊ h）,Smoke〈0. 1 FSN,CO and HC as low as possible） was explored and discussed. The internal EGR was achieved by opening the exhaust valve twice during the intake process,where the engine speed andfuel injection were fixed at 1 500 r /min and 28 mg/cycle respectively. Results show that under the synergistic control of early fuel injection t imin g, low EGR rate and proper intake pressure （0. 12 MPa）, the enginefueled by RON 93 gasoline can achieve high-efficient and clean combustion at the IM EP of about 0. 47 MPa.

关 键 词：汽油燃料 低温燃烧 压燃 进气压力 内部废气再循环 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]