Mode Shift Control for a Hybrid Heavy-Duty Vehicle with Power-Split Transmission

Kun Huang, Changle Xiang, Yue Ma, Weida Wang and Reza Langari
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Kun Huang: National Key Laboratory of Vehicle Transmission, Beijing Institute of Technology, Beijing 100081, China
Changle Xiang: National Key Laboratory of Vehicle Transmission, Beijing Institute of Technology, Beijing 100081, China
Yue Ma: National Key Laboratory of Vehicle Transmission, Beijing Institute of Technology, Beijing 100081, China
Weida Wang: National Key Laboratory of Vehicle Transmission, Beijing Institute of Technology, Beijing 100081, China
Reza Langari: Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA

Energies, 2017, vol. 10, issue 2, 1-18

Abstract: Given that power-split transmission (PST) is considered to be a major powertrain technology for hybrid heavy-duty vehicles (HDVs), the development and application of PST in the HDVs make mode shift control an essential aspect of powertrain system design. This paper presents a shift schedule design and torque control strategy for a hybrid HDV with PST during mode shift, intended to reduce the output torque variation and improve the shift quality (SQ). Firstly, detailed dynamic models of the hybrid HDV are developed to analyze the mode shift characteristics. Then, a gear shift schedule calculation method including a dynamic shift schedule and an economic shift schedule is provided. Based on the dynamic models and the designed shift schedule, a mode shift performance simulator is built using MATLAB/Simulink, and simulations are carried out. Through analysis of the dynamic equations, it is seen that the inertia torques of the motor–generator lead to the occurrence of transition torque. To avoid the unwanted transition torque, we use a mode shift control strategy that coordinates the motor–generator torque to compensate for the transition torque. The simulation and experimental results demonstrate that the output torque variation during mode shift is effectively reduced by the proposed control strategy, thereby improving the SQ.

Keywords: hybrid heavy-duty vehicle (HDV); power-split transmission (PST); shift schedule design; mode shift control strategy; motor torque control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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