Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (12): 2765-2777.doi: 10.13229/j.cnki.jdxbgxb20210401

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Start up control strategy of plug in hybrid system based on double clutch transmission

Yong LUO1,2(),Yi SUI3,Fu-tao SHEN2,Qiang SUN4,Yun-xiao DENG2,Yong-heng WEI2   

  1. 1.State Key Laboratory of Vehicle NVH and Safety Control，China Automotive Engineering Research Institute Co. ，Ltd. ，Chongqing 401122，China
    2.Key Laboratory of Advanced Manufacturing Technology for Automobile Parts，Chongqing University of Technology，Chongqing 400054，China
    3.College of Mechanical and Power Engineering，Chongqing University of Science and Technology，Chongqing 401331，China
    4.Technical Center，Ningbo Jiecheng Automobile Technology Co. ，Ltd. ，Ningbo 315048，China
  • Received:2021-05-06 Online:2022-12-01 Published:2022-12-08

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Abstract:

The coordinated control of multiple power sources and dual clutches in the starting process of dual clutch plug-in hybrid vehicle is studied. Firstly， the dynamics of different starting modes of the system is analyzed， and the system mathematical model and starting performance evaluation index are established. On this basis， considering SOC， load condition， slope and other factors and the driver's starting intention， the system starting mode decision-making method is established. The coordinated control strategy of power source and dual clutch for each starting mode is formulated with the maximum impact as the constraint. The simulation results show that the selection of starting mode under different working conditions is reasonable. The maximum impact degree is 7.31 m/s3， and the maximum sliding friction work is 4.94 kJ， all within a reasonable range， which verifies the effectiveness of the strategy.

Key words: vehicle engineering, plug-in hybrid electric vehicle, dual clutch transmission, start-up process control, road conditions, driver's intention

CLC Number: 

  • U463.2

Fig.1

Structure of P2.5-PHPS based on DCT"

Table 1

Working status of power source and clutch of different start-up types"

起步类型动力源双离合器
发动机电机C1C2
纯电动起步不工作工作不工作不工作
单离合器C1起步工作不工作工作不工作
单离合器C2起步工作不工作不工作工作
联合起步C1最终结合工作不工作工作工作
联合起步C2最终结合工作不工作工作工作

Fig.2

Simplified DCT system dynamics model based on P2.5 configuration"

Fig.3

P2.5-PHPS start-up mode selection strategy"

Fig.4

P2.5-PHPS start-up process control logic"

Fig.5

P2.5-PHPS start-up simulation model framework"

Fig.6

Engine torque characteristic model"

Fig.7

Efficiency model of P2.5 drive motor"

Table 2

Basic parameters of research objects"

参 数数值
整备质量/kg1580
轮胎半径/m0.308
滚动系数0.015
风阻系数0.31
迎风面积/m22.226
发动机峰值扭矩/（N·m）80
发动机峰值功率/kW45
P2.5电机峰值扭矩/（N·m）172
P2.5电机峰值功率/kW80
一/二挡到轮端速比（发动机）13.95/7.466
二挡到轮端速比（P2.5驱动电机）8.245

Fig.8

Driver's start-up intention recognitionverification"

Fig.9

Pure electric start-up simulation results"

Fig.10

Simulation results of engine combined with dual clutch start-up"

Fig.11

Simulation results of dual power joint start-up"

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