THS功率回流问题分析及其解决方案  

Analysis of power reflux problem and its solution of THS

作　　者：刘学武 徐向阳[1] 黄河 赵江灵 李凯峰 董鹏[1] LIU Xuewu;XU Xiangyang;HUANG He;ZHAO Jiangling;LI Kaifeng;DONG Peng(School of Transportation Science and Engineering,Beihang University,Beijing 100191,China;GAC Automotive Research&Development Center,Guangzhou 511434,China)

机构地区：[1]北京航空航天大学交通科学与工程学院,北京100191 [2]广州汽车集团股份有限公司汽车工程研究院,广州511434

出　　处：《北京航空航天大学学报》2025年第3期874-880,共7页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金(52172352,52322216)。

摘　　要：分析丰田混合动力系统(THS)在高速工况存在的功率回流现象及其原因,提出一种解决其功率回流问题的混合动力机电耦合系统方案,即在THS的基础上增加一个制动器,不仅消除了功率分流现象,而且增加了一个发动机直驱模式,降低了燃油消耗。仿真对比2种系统在定速工况的油耗,发现增加制动器后,系统的90 km/h等速油耗改善了7.7%,120 km/h等速油耗改善了3.9%。此外,对2种系统分别在2个等速工况下的控制策略进行分析。结果表明:改进后的系统在采用发动机直驱模式时,避免了THS的功率回流问题,提高了系统效率,改善了整车油耗。After analyzing the occurrence and the reason behind the power reflux in toyota hybrid system(THS)at high speeds,a novel hybrid electromechanical coupling system scheme that can address the power reflux issue is put forth.The system not only solves the power reflux problem,but also adds an engine direct drive mode and reduces fuel consumption by adding a brake based on THS.By comparing the fuel consumption of the two systems under constant speed conditions,it is found through simulation that the fuel consumption at 90 km/h and 120 km/h can improve by 7.7%and 3.9%after adding brakes.Furthermore,an analysis is conducted on the control strategies employed by the two systems under the two constant speed conditions.The findings indicate that the enhanced system circumvents THS’s power return issue,enhances system efficiency,and optimizes the vehicle's fuel consumption when it employs the engine direct drive mode.

关 键 词：混合动力 机电耦合系统 功率分流 等速油耗 发动机直驱模式 功率回流 

分 类 号：U469.72[机械工程—车辆工程]