کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6632302 | 1424949 | 2018 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental study on combustion and emission characteristics of turbocharged gasoline direct injection (GDI) engine under cold start new European driving cycle (NEDC)
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
aTDCIMEPTWCVVTWLTCcadCTDCNEDCPFIRGFGDIWLTPUDCEGREUDCDCGExtra Urban driving cycleLPGThree way catalystsbTDC - BTDCNOx - NOXinternal combustion - احتراق داخلیEmission - انتشارResearch Octane Number - اکتان شماره تحقیقnitrogen oxide - اکسید نیتروژنafter top dead center - بعد از مرده مردهport fuel injection - تزریق سوخت پورتgasoline direct injection - تزریق مستقیم بنزینspark ignition - جرقه جرقهparticulate matter - ذرات معلقRON - رونVariable valve timing - زمان بندی متغیر شیرSOC - سیستم روی یک تراشهStart of combustion - شروع احتراقbefore top dead center - قبل از مرده مردهtop dead center - مرکز مرده بالاcarbon monoxide - منوکسیدکربنIndicated mean effective pressure - نشان دهنده فشار متوسط موثر استhydrocarbon - هیدروکربنCombustion characteristics - ویژگی های احتراقUrban Driving Cycle - چرخه رانندگی شهریnew European driving cycle - چرخه ی جدید اروپاییResidual gas fraction - کسری گاز باقی ماندهliquefied petroleum gas - گاز مایع شدهexhaust gas recirculation - گردش بازگشتی گاز اگزوز
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, the combustion and emission characteristics of a turbocharged GDI engine under cold start NEDC were investigated based on chassis dynamometer test. The operating states, combustion and emission performance of GDI engine were measured continuously during vehicle driving cycles. Then, the combustion and emission characteristics of GDI engine under cold start NEDC were obtained and the influence factors were revealed by synchronous analysis of various operating parameters. The results show that, the combustion duration from start of combustion (SOC) to 50% combustion location changes a little under cold start NEDC. At most time, the 10-90% combustion duration usually changes in the range of 20-40â¯Â°CA, which turns longer under idling conditions but shorter under acceleration conditions. Since the sparking timing is severely retarded in the beginning stages of NEDC, the effect of cold start on hydrocarbon (HC) emission is very limited. HC emission increases sharply under deceleration conditions, due to the decrease of engine indicated mean effective pressure (IMEP). Carbon monoxide (CO) emission does not seem to have relevance to the cold start condition, and it is very sensitive to excess air coefficient while the effects of other parameters are very little. Nitrogen oxide (NOx) emission increases under acceleration conditions but decreases under deceleration conditions, which is mainly influenced by the IMEP, then followed by engine speed. All those not only demonstrated the change rules of combustion and emission characteristics of turbocharged GDI engine under cold start NEDC, but also provided the guidance for improving the vehicle emission performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 215, 1 March 2018, Pages 272-284
Journal: Fuel - Volume 215, 1 March 2018, Pages 272-284
نویسندگان
Guohui Zhu, Jingping Liu, Jianqin Fu, Zhengxin Xu, Qiyi Guo, He Zhao,