P2.5-PHPS发动机至混合驱动模式切换过程动态协调控制研究  

Research on P2.5-PHPS engine mode to hybrid drive mode switching process dynamic coordinated control

作　　者：罗勇[1,3] 李豪 常光宝 张嘉璐 韦永恒 任淋 孙强 LUO Yong;LI Hao;CHANG Guangbao;ZHANG Jialu;WEI Yongheng;REN Lin;SUN Qiang(Key Laboratory of Advanced Manufacturing Technology of Ministry of Education for Automotive Parts and Components,Chongqing University of Technology,Chongqing 400054,China;Technical Center of Shanghai General Motors Wuling Co.,Ltd.,Liuzhou 545007,China;Technology Center,Ningbo Shenglong(Group)Co.,Ltd.,Ningbo 315199,China)

机构地区：[1]重庆理工大学汽车零部件先进制造技术教育部重点实验室,重庆400054 [2]上汽通用五菱汽车股份有限公司技术中心,广西柳州545007 [3]宁波圣龙(集团)有限公司技术中心,浙江宁波315199

出　　处：《重庆理工大学学报（自然科学）》2023年第12期28-39,共12页Journal of Chongqing University of Technology：Natural Science

基　　金：重庆理工大学重大科研项目同步开展基础及应用基础研究(2022TBZ003);重庆市教委科学技术研究项目(KJQN202201125);汽车噪声振动和安全技术国家重点实验室开放基金项目(NVHSKL-201702)。

摘　　要：搭载双离合变速器的P2.5插电式混合动力系统传动效率高,换挡和模式切换过程无动力中断,应用前景广阔,但其模式切换过程由于发动机与电机的扭矩响应特性存在差异,扭矩波动明显,影响驾乘体验。针对上述问题,提出一种发动机驱动至混合驱动模式切换的协调控制策略,以搭载双离合变速器的P2.5插电式混合动力系统为研究对象,对其发动机至混合驱动模式切换过程进行分析,依据分析结果将系统模式切换过程划分为4个阶段。在此基础上,基于PID反馈原理控制动力源的实际输出转矩并通过控制加速踏板开度变化率限制发动机的扭矩变化率,利用驱动电机扭矩快速响应的优势补偿发动机扭矩响应滞后来降低输出扭矩波动,制定模式切换过程多阶段双动力源扭矩协调控制策略。搭建基于P2.5插电式混合动力系统的发动机至混合驱动模式切换动态协调控制仿真模型。仿真结果表明,模式切换过程无动态协调控制策略的最大冲击度约7.1 m/s^(3),策略下最大冲击度约1.78 m/s^(3),减小74.9%,表明所提出的控制策略能有效减小模式切换过程冲击度,提高整车平顺性。As P2.5 plug-in hybrid system with dual clutch transmission boasts high transmission efficiency,no power interruption during gear shifting and mode switching,it shows a wide application prospect.But its mode switching process has significant torque fluctuation due to the difference in torque response characteristics between the engine and the motor,which affects the driving experience.To address the problems,this paper proposes a coordinated control strategy for switching from engine drive to hybrid drive mode,and takes the P2.5 plug-in hybrid system with dual clutch transmission as the research object.On this basis,the actual output torque of the power source is controlled based on the PID feedback principle and the engine torque change rate is limited by controlling the accelerator pedal opening change rate,and the output torque fluctuation is reduced by compensating the engine torque response lag with the advantage of fast drive motor torque response.The simulation model of engine to hybrid drive mode switching based on P2.5 plug-in hybrid system is developed.The simulation results show the maximum shock degree without dynamic coordination control strategy is about 7.1 m/s^(3)during mode switching,and the maximum shock degree under this strategy is about 1.78 m/s^(3),down by 74.9%,proving the proposed control strategy can effectively reduce the shock degree during mode switching and improve vehicles’overall driving stability.

关 键 词：P2.5插电式混合动力系统 模式切换过程 湿式双离合变速器 转矩变化率限制 动态协调控制 

分 类 号：U463.2[机械工程—车辆工程]