喷油策略对直喷汽油机油耗和颗粒物排放的影响  

Effects of Injection Strategies on Fuel Consumption and PN Emission of a GDI Engine

作　　者：牛贝妮 段伟 解方喜[3] 洪伟[3] NIU Beini;DUAN Wei;XIE Fangxi;HONG Wei(Shanghai Hong Jing Intelligent Drive Information Technology Co.,Ltd.(Shanghai,201807,China);FCA Powertrain Technologies(Shanghai)R&D Co.,Ltd.;State Key Laboratory of Automobile Simulation and Control,Jilin University)

机构地区：[1]上海宏景智驾信息科技有限公司,上海201807 [2]菲亚特克莱斯勒动力科技研发(上海)有限公司 [3]吉林大学汽车仿真与控制国家重点实验室

出　　处：《小型内燃机与车辆技术》2022年第3期1-5,共5页Small Internal Combustion Engine and Vehicle Technique

基　　金：吉林省科技发展计划项目(20200403150SF)。

摘　　要：为了满足日益严格的排放和油耗标准要求,合理优化喷油正时和喷油压力已成为降低排放和油耗的关键措施之一。在某小型直喷增压汽油机上的研究结果表明:适当提高喷油压力和加大喷油提前角,可有效降低PN排放和油耗,喷油提前角过大或者过小都会使PN排放升高。在冷机(冷却水温度为40℃)工况,喷油压力和喷油提前角对PN排放和油耗的影响趋势一致。在3 000 r/min以下,优化的喷油提前角为280~300°CA BTDC;在3 000~5 000 r/min,优化的喷油提前角为300~320°CA BTDC。In order to meet the increasingly stringent pollutant emissions and fuel consumption standard requirements, it has become one of the key factors to reduce emissions and fuel consumption by the proper optimization of the injection timing and injection pressure. The test results of a small direct injection gasoline turbo-charged engine showed that, the appropriate increase of injection pressure and fuel injection advance angle could effectively reduce PN emission and improve fuel consumption, and a bigger or a smaller fuel injection advance angle could lead to a deterioration of particle number emission. In the cold(coolant temperature=40 ℃) conditions, the influence of injection pressure and fuel injection advance angle on PN emission and fuel consumption was consistent. Below the engine speed 3 000 r/min, the optimal fuel injection advance angle was approximately 280~300 °CA BTDC, and at the engine speed 3 000 ~5 000 r/min, it was about 300~320 °CA BTDC.

关 键 词：直喷汽油机 喷油正时 喷油压力 排放 颗粒物数量 

分 类 号：TK417.11[动力工程及工程热物理—动力机械及工程]