摘要
介绍了一种电子水泵的背景和结构,并对比了不同散热方案的区别。基于电子水泵的特性,对电子水泵在快速暖机、发动机和整车上的控制效果进行了研究。试验表明:发动机冷却液温度从冷启到95℃以上的过程可分为3个阶段,通过适当策略可缩短暖机时间约20%;水温可通过油温和壁温影响热平衡,而流量控制可依据发动机各个工况的适配温度来进行设定,中低负荷时水温每上升10℃约能获得3 g/kW·h的油耗收益,从热平衡的角度看,合理的目标设定能够在整车上节油0.5%~1%;此外,电子水泵在整车上的主要功能是避免流量过剩,如仅考虑机械功的节省,NEDC循环内能够实现节油1.75%的效果。
The background and mechanical structure of an electric water pump(EWP)were introduced,and the differences of different heat dissipation schemes were compared.Based on EWP,several tests were completed to analyze the vehicle warm-up process and its performance.The result shows that normal coolant temperature rising to 95℃in the engine warm-up process may go through three stages and the warm-up process could be accelerated by 20%.Coolant temperature could make an influence on oil and wall temperature and finally change the thermal balance.Flow could be controlled according to each optimal temperature of the engine s working condition.3 g/kW·h fuel consumptions could be saved by every 10℃increase of the temperate when the engine is under low or medium load.Total fuel consumption can be saved by 0.5%~1%from the perspective of thermal balance upon a reasonable target setting.Moreover,EWP is mainly to control the flow on vehicle.Considering only the saving of mechanical power,EWP can save fuel consumption by 1.75%in NEDC cycle.
作者
林承伯
吴广权
乔艳菊
张旭
董春艳
LIN Chengbo;WU Guangquan;QIAO Yanju;ZHANG Xu;DONG Chunyan(GAC Automotive Research&Development Center,Guangzhou Guangdong 511434,China)
出处
《汽车零部件》
2021年第12期1-6,共6页
Automobile Parts
基金
国家重点研发计划项目(2017YFB0103300)。
关键词
冷却液
电子水泵
暖机
冷却系统
发动机
Coolant
Electric water pump
Warm-up
Cooling system
Gasoline engine
