Experimental Study on the Combustion and Energy Flows of Vehicle Engine Under NEDC of Cold Start

作     者：Zhichao Zhao Zaiqiang Meng Lu Li Shuqian Wang Jianqin Fu Jingping Liu 

作者机构：China Automotive Engineering Research Institute Co.LtdChongqing 401122China State Key Laboratory of Advanced Design and Manufacturing for Vehicle BodyHunan UniversityChangsha 410082China 

出 版 物：《Automotive Innovation》 (汽车创新工程（英文）)

年 卷 期：2019年第2卷第4期

页      面：314-327页

核心收录：

学科分类：1002[医学-临床医学] 0802[工学-机械工程] 100214[医学-肿瘤学] 0823[工学-交通运输工程] 10[医学] 

基　　金：This research work is jointly sponsored by the National Natural Science Foundation of China(No.51776061) Young Elite Scientists Sponsorship Program of the China Association for Science and Technology(No.2017QNRC001) Fundamental Research Funds for the Central Universities 

主　　题：Vehicle New European Driving Cycle Cold start Energy flow Energy loss 

摘      要：To enhance the fuel economy of a vehicle powered by a gasoline engine under road conditions,an energy flow test of a vehicle was performed experimentally under the New European Driving Cycle of cold *** energy distributions and related influencing factors were analyzed using the test *** show that the effective power and thermal efficiency are mainly affected by the engine load except in the early stage of the New European Driving *** of the retarded CA50 and longer CA10-90,the effective thermal efficiency is lower in the early phase of driving ***,the heat transfer loss mainly comprises the loss of the heating,ventilation,and air conditioning *** radiator then plays the major role,with its percentage affected by the engine load and decreasing under the extra-urban driving *** exhaust gas loss is decided by the temperature and flow rate of the exhaust gas,while its percentage is mainly affected by the temperature of the exhaust *** the early phase of driving conditions,the retarded spark advance angle leads to a higher temperature of the exhaust gas and a greater exhaust gas *** pumping loss and its percentage are mainly determined by the engine speed under the urban driving cycle,and both decrease under the extra-urban driving cycle except at maximum vehicle speed.