考虑驾驶意图的P2.5-PHPS纯电与发动机切换协调控制

doi:10.3969/j.issn.1674-8484.2024.06.009

摘要/Abstract

摘要：

为保证P2.5插电式混合动力系统（PHPS）由纯电驱动模式向发动机驱动模式切换过程的平稳性，对该模式切换过程中双动力源和双离合器（DCT）动态协调控制策略开展研究，并搭建系统模型对控制效果进行仿真分析。将P2.5-PHPS纯电至发动机驱动模式切换过程划分为不同阶段，建立系统多阶段模式切换过程动力学模型。利用P2.5驱动电机扭矩响应快速的优势，补偿发动机和离合器扭矩响应滞后引起的波动，结合驾驶员操作意图，制定模式切换过程各阶段的发动机、电机及离合器动态协调控制策略。搭建系统模型进行仿真分析，结果表明：在纯电至发动机模式切换过程中，整车最大纵向冲击度不超过5 m/s³，离合器滑磨功控制在3 kJ内，满足平顺性要求。

关键词: 插电式混合动力（PHPS）汽车, P2.5构型混动系统, 双离合变速器（DCT）, 动态协调控制, 模式切换控制

Abstract:

A study was conducted on the dynamic coordinated control strategy of dual power sources was built with a Double Clutch Transmission (DCT) during the mode switching process, and with a system model for simulating and analyzing the control effect to ensure the smoothness of the transition from pure electric drive mode to engine drive mode in the P2.5 Plug in Hybrid Power System (PHPS). Divided the P2.5-PHPS pure electric to engine drive mode switching process into different stages and established a dynamic model for the multi-stage mode switching process of the system. Taking advantage of the fast torque response of the P2.5 drive motor, compensating for the fluctuations caused by the lagging torque response of the engine and clutch, and combining with the driver's operating intention, developing dynamic coordinated control strategies for the engine, motor, and clutch in each stage of the mode switching process. Built a system model for simulation analysis. The results show that during the transition from pure electric to engine mode, the maximum longitudinal impact of the vehicle does not exceed 5 m/s³, and the clutch slip and wear power is controlled within 3 kJ, which meet the smoothness requirements.

Key words: plug in hybrid electric system (PHPS), P2.5 configuration hybrid system, dual clutch transmission, dynamic coordination control (DCT), mode switching control

中图分类号:

U467.1+4

罗勇, 李莉莎, 韦永恒, 李豪, 孙强. 考虑驾驶意图的P2.5-PHPS纯电与发动机切换协调控制[J]. 汽车安全与节能学报, 2024, 15(6): 875-885.

LUO Yong, LI Lisha, WEI Yongheng, LI Hao, SUN Qiang. Dynamic coordinated control of P2.5 plug-in hybrid configuration from pure electric to engine mode switching process considering driver’s intention[J]. Journal of Automotive Safety and Energy, 2024, 15(6): 875-885.

图/表 23

图1 搭载DCT的P2.5-PHPS结构简图

工作模式	档	动力源		双离合器
纯电动	—	发动机	P2.5电机	C1	C2
发动机	偶数	不工作	工作	分离	分离
发动机	偶数	工作	不工作	分离	接合
混合动力	奇数	工作	不工作	接合	分离
混合动力	偶数	工作	工作	分离	接合
行车充电	奇数	工作	工作	接合	分离
行车充电	偶数	工作	工作	分离	接合

表1 不同模式车辆各传动机构工作状态

图2 P2.5构型混合动力传动系统简化模型

图3 P2.5-PHPS纯电动至发动机模式切换仿真模型框架

图4 发动机扭矩输出特性数值模型

图5 P2.5驱动电机效率特性数值模型

整车质量	1.580 t
轮胎半径	0.308 m
滚阻因数	0.015
风阻因数	0.310
迎风面积	2.226 m²
发动机峰值扭矩	80 Nm
发动机峰值功率	45 kW
电机峰值扭矩	172 Nm
电机峰值功率	80 kW
发动机一档到轮端速比	13.950
发动机二档到轮端速比	7.466
驱动电机二档到轮端速比	8.245

表2 研究对象部分基本参数

图6 纯电动至发动机模式切换过程控制逻辑图

图7 加速踏板开度隶属度函数图

图8 加速踏板开度变化率函数图

图9 初始油压结合函数图

α	P
α	da / dt = VS	S	M	B	VB
VS	VS	S	MS	MS	M
S	S	S	MS	M	MB
M	M	MS	M	MB	MB
B	MS	M	M	B	B
VB	M	MB	MB	B	VB

表3 初始油压模糊控制规则

图10 基于驾驶员意图的初始结合油压模糊控制曲面

$ \dot{\alpha}$	P
$ \dot{\alpha}$	da/dt = VS	S	M	B	VB
VS	M	MS	MS	S	VS
S	MB	M	MS	S	S
M	MB	MB	M	MS	MS
B	B	B	MB	M	MS
VB	VB	B	MB	MB	M

表4 油压变化率模糊控制规则

图11 基于驾驶员意图的结合油压变化率模糊控制曲面

图12 模式切换过程标识位

图13 模式切换过程状态位

图14 发动机和P2.5驱动电机输出扭矩

图15 离合器片转速

图16 离合器结合油压

图17 离合器传递扭矩

图18 离合器滑摩功

图19 整车纵向冲击度

参考文献 22

[1]	王泽鹏. 我国节能与新能源汽车发展战略与对策[J]. 内燃机与配件, 2021(1): 154-155.
	WANG Zhepeng. Development strategies and countermeasures of energy saving and new energy vehicles in China[J]. Inte Comb Engi Part, 2021(1): 154-155. (in Chinese)
[2]	徐金梅. 插电式混合动力汽车性能研究及发展前景分析[J]. 装备维修技术, 2023(2): 11-16.
	XV Jinmei. Performance research and development prospect analysis of plug in hybrid electric vehicles[J]. Equip Tech, 2023(2): 11-16. (in Chinese)
[3]	Goetz M, Levesley M C, Crolla D A. Dynamics and control of gearshifts on twin-clutch transmissions. Proceedings of the institution of mechanical engineers, Part D[J]. J Autom Engineering, 2005, 219(8): 951-963.
[4]	郭政, 秦大同, 李盛炜, 等. 考虑DCT车辆起步过程离合器接合稳定性的双质量飞轮参数优化[J]. 振动与冲击, 2023, 42(14): 162-169+219.
	GUO Zheng, QIN Datong, LI Shengwei, et al. Parameter optimization of dual-mass flywheel considering the clutch engagement stability during the DCT vehicle starting process[J]. Vibr Shock, 2023, 42(14): 162-169+219. (in Chinese)
[5]	郝洪涛, 马辉. 湿式双离合器换挡优化控制[J]. 机械科学与技术, 2022, 41(6): 936-947.
	HAO Hongtao, MA Hui. Wet dual-clutch transmission shift optimization control[J]. Mech Sci Tech, 2022, 41(6): 936-947. (in Chinese)
[6]	LIU Bo, ZHANG Xingui, SHI Xinglei, et al. Wet Dual-Clutch Drag Torque Algorithm and Its Application[J]. Chin Mech Engi, 2022, 33(15): 1882-1889.
[7]	YANG Chao, SONG Jian, LI Liang, et al. Economical launching and accelerating control strategy for a single-shaft parallel hybrid electric bus[J]. Mech Syst Sign Proc, 2016, 76: 649-664.
[8]	姜赟涛. 基于P2构型PHEV的模式切换过程平顺性研究[D]. 长春: 吉林大学, 2020.
	JIANG Yuntao. Research on the mode switching smoothness of P2 configuration PHEV[D]. Changchun: Jilin University, 2020. (in Chinese)
[9]	岳芸鹏, 黄英, 曾雯文, 等. 基于P2.5构型的混合动力汽车模式切换动态协调控制策略[J]. 汽车工程学报, 2020, 10(3): 170-179.
	YUE Yunpeng, HUANG Ying, ZENG Wenwen, et al. Dynamic coordination control strategy for mode switching of hybrid electric vehicles based on P2.5 configuration[J]. J Autom Engi, 2020, 10(3): 170-179. (in Chinese)
[10]	ZHAO Zhiguo, LEI Dan, CHEN Jiayi, et al. Optimal control of mode transition for four-wheel-drive hybrid electric vehicle with dry dual-clutch transmission[J]. Mech Syst Sig Proc, 2018, 105: 68-89.
[11]	赵彬, 宁甲奎, 周达, 等. P2混合动力离合器辅助发动机起动控制方法研究[J]. 汽车技术, 2018, 12: 23-27.
	ZHAO Bin, NING Jiakui, ZHOU Da, et al. Research on P2 hybrid clutch-assisted engine start control method[J]. Autom Tech, 2018, 12: 23-27. (in Chinese)
[12]	赵治国, 黄琪琪, 倪润宇. 串并联混合动力系统自适应模式切换优化控制[J]. 同济大学学报(自然科学版), 2023, 51(6): 943-953.
	ZHAO Zhiguo, HUANG Qiqi, NI Runyu. Adaptive mode switching optimization control of series-parallel hybrid powertrain system[J]. J Tongji Univ (Nat Sci Ed), 2023, 51(6): 943-953. (in Chinese)
[13]	刘金刚, 肖培杰, 傅兵, 等. 并联式混合动力汽车模式切换控制策略研究[J]. 中国公路学报, 2020, 33(8): 42-50. doi: 10.19721/j.cnki.1001-7372.2020.08.005
	LIU Jingang, XIAO Peijie, FU Bing, et al. Research on mode switching control strategy of parallel hybrid electric vehicles[J]. Chin J Highw Transport 2020, 33(8): 42-50. (in Chinese)
[14]	HE Ren, TIAN Xiang, NI Yunlei, et al. Mode transition coordination control for parallel hybrid electric vehicle based on switched system[J]. Adva Mech Eng, 2017, 9(8): 2936-2949.
[15]	王伟华, 王文楷, 冯博, 等. 并联式混合动力汽车驱动模式切换协调控制方法[J]. 交通运输工程学报, 2017, 17(2): 90-97.
	WANG Weihua, WANG Wenkai, FENG Bo, et al. Coordinated control method for drive mode switching of parallel hybrid electric vehicles[J]. J Traf Transport Engi, 2017, 17(2): 90-97. (in Chinese)
[16]	SONG Shuzhong, GUAN Yuxue, FU Zhumu, et al. Switching control from motor driving mode to hybrid driving mode for PHEV[C]// Chin Automation Congress (CAC), 2017: 4209-4214.
[17]	张渊博, 王伟达, 项昌乐, 等. 基于模型预测控制的混合动力汽车模式切换中的转矩协调控制策略[J]. 汽车工程, 2018, 40(9): 1040-1047.
	ZHANG Yuanbo, WANG Weida, XIANG Changle, et al. Torque coordination control strategy in mode switching of hybrid electric vehicles based on model predictive control[J]. Autom Engineering, 2018, 40(9): 1040-1047. (in Chinese)
[18]	WANG Qi, JIN Lijiang. Simulation research on driving mode switching of parallel hybrid electric vehicle[C]// China Society of Automotive Engineers, 2017: 12-23.
[19]	SUN Jing, XING Guojing, ZHANG Chenghui. Data-driven predictive torque coordina-tion control during mode transition process of hybrid electric vehicles[J]. Energies, 2017, 10(4): 441-462.
[20]	Oh J, Choi S B, Chang Y J, et al. Engine clutch torque estimation for parallel-type hybrid electric vehicles[J]. Int’l J Autom Tech, 2017, 18: 125-135.
[21]	LIN Yupei, QIN Datong, HU Minghui. Torque coordination control strategy in engine startup process for a single motor hybrid electric vehicle[J]. Int’l J Elect Hybrid Vehi, 2018, 10: 177-196.
[22]	严正峰, 蒋光宗, 姚明尧. 驱动系统效率最优的并联混合动力商用车模式切换及换挡控制策略[J]. 中国机械工程, 2024, 35(2): 354-363.
	YAN Zhengfeng, JIANG Guangzong, YAO Mingyao. Mode switching and gearshift control strategy for parallel hybrid commercial vehicles with optimal drive system effi-ciency[J]. Chin Mech Eng, 2024, 35(2): 354-363. (in Chinese)