Dynamic coordinated control of P2.5 plug-in hybrid configuration from pure electric to engine mode switching process considering driver’s intention

doi:10.3969/j.issn.1674-8484.2024.06.009

Abstract

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

CLC Number:

U467.1+4

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.

Figures/Tables 23

References 22

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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

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

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

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

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