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Energies 2017, 10(2), 177; doi:10.3390/en10020177

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

1
National Key Laboratory of Vehicle Transmission, Beijing Institute of Technology, Beijing 100081, China
2
Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA
*
Authors to whom correspondence should be addressed.
Academic Editor: K.T. Chau
Received: 15 December 2016 / Revised: 24 January 2017 / Accepted: 24 January 2017 / Published: 4 February 2017
View Full-Text   |   Download PDF [15810 KB, uploaded 4 February 2017]   |  

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. View Full-Text
Keywords: hybrid heavy-duty vehicle (HDV); power-split transmission (PST); shift schedule design; mode shift control strategy; motor torque control hybrid heavy-duty vehicle (HDV); power-split transmission (PST); shift schedule design; mode shift control strategy; motor torque control
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Huang, K.; Xiang, C.; Ma, Y.; Wang, W.; Langari, R. Mode Shift Control for a Hybrid Heavy-Duty Vehicle with Power-Split Transmission. Energies 2017, 10, 177.

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