Dynamic coordinated control during mode transition process for a compound power-split hybrid electric vehicle

Due to the direct connection between the engine and the compound power split hybrid transmission (CPSHT) in hybrid electric vehicle (HEV), engine ripple torque (ERT) can result in obvious jerks in engine starting process (ESP). In order to improve the riding comfort, two wet clutches are mounted in this novel CPSHT. This research developed a new coordinated control strategy and its effectiveness was verified in simulation. Firstly, the mechanical and hydraulic parts of the CPSHT were introduced, and the riding comfort problem during ESP in primary design was illustrated. Secondly, the dynamic plant model including ERT, driveline model and clutch torque was deduced. Thirdly, a coordinated control strategy was designed to determine the target engine torque, motor torque, clutch torque and the moment of fuel injection. A Kalman filter based clutch torque estimator was applied with the help of electric motors information. The simulation result indicates that proposed coordinated control strategy can indeed suppress vehicle jerk and improve the riding comfort in ESP.

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Research on Compound Coordinated Control for A Power-split Hybrid Electric Vehicle Based on Compensation of Non-ideal Communication Network

IEEE Transactions on Vehicular Technology ◽

10.1109/tvt.2020.3040777 ◽

2020 ◽

pp. 1-1

Author(s):

Jiajia Wang ◽

Yingfeng Cai ◽

Long Chen ◽

Dehua Shi ◽

Shaohua Wang ◽

...

Keyword(s):

Communication Network ◽

Electric Vehicle ◽

Hybrid Electric Vehicle ◽

Coordinated Control ◽

Power Split ◽

Hybrid Electric

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Model Predictive Coordinated Control for Dual-Mode Power-Split Hybrid Electric Vehicle

International Journal of Automotive Technology ◽

10.1007/s12239-018-0033-0 ◽

2018 ◽

Vol 19 (2) ◽

pp. 345-358 ◽

Cited By ~ 9

Author(s):

Yunlong Qi ◽

Changle Xiang ◽

Weida Wang ◽

Boxuan Wen ◽

Feng Ding

Keyword(s):

Electric Vehicle ◽

Hybrid Electric Vehicle ◽

Coordinated Control ◽

Dual Mode ◽

Power Split ◽

Hybrid Electric

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Dynamic Torque Coordinated Control Considering Engine Starting Conditions for a Power-Split Plug-in Hybrid Electric Vehicle

Applied Sciences ◽

10.3390/app11052085 ◽

2021 ◽

Vol 11 (5) ◽

pp. 2085

Author(s):

Yanzhao Su ◽

Minghui Hu ◽

Jin Huang ◽

Datong Qin ◽

Chunyun Fu ◽

...

Keyword(s):

Electric Vehicle ◽

Hybrid Electric Vehicle ◽

Control Method ◽

Feedforward Control ◽

Coordinated Control ◽

Power Split ◽

Before And After ◽

Starting Conditions ◽

Hybrid Electric ◽

The Impact

For a power-split plug-in hybrid electric vehicle (PS-PHEV), the control system cannot effectively reduce jerks under some engine-starting conditions due to the pulsating torque of the engine, elastic characteristics of the transmission, battery power limitations, and the limitation of the maximum torque of the motor. To solve this problem, a dynamic torque-coordinated control method considering engine starting conditions (DTCC-ESC) is proposed in this paper. The proposed DTCC-ESC mainly includes three parts: the engine segment active control before and after engine ignition to minimize the impact of the engine ripple torque on the shocks of the powertrain system; the feedforward control of the engine starting conditions and the feedback control of the engine’s optimal target speed; and the active damping feedback compensation control for system resonance to reduce system vibrations. The results show that the proposed DTCC-ESC can effectively improve driving comfort under different engine starting conditions.

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