The Control System Design of Hydraulic Hybrid Vehicle Based on CAN Bus

Shigang Li*, 1, Dandan Liu1, Bin Xie2
1 College of Mechanical and Electrical, Beijing Union University, Beijing, China
2 College of Engineering, Agricultural University China, Beijing, China

© 2014 Li et al

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: ( This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the College of Mechanical and Electrical, Beijing Union University, North Fourth Ring Road No. 97, Chaoyang District of Beijing, 100021, China; Tel: +86 13810276385; E-mail:


The hybrid vehicle is a new type of green and energy efficient vehicle. Hydraulic accumulator and variable pump/motor make up the break energy regeneration utilization system, which is the core of hydraulic auxiliary driving unit. The hybrid drive system is composed of hydraulic auxiliary driving unit and the original vehicle drive system. As it relates to the recovery of the braking energy and the situation of two kinds of power-driven vehicle, it brings complexity to the hybrid distribution strategy, and an efficient energy control system is necessary. Based on CAN bus technology, using the CAN2.0B communication protocol for the system design, the core hardware system is composed of PC/104 computer and CAN communication card, the key nodes of hydraulic auxiliary drive unit use DSP chip TMS320LF2407. Experiments show that the system has a high communication reliability and high accuracy of dynamic coupling, the safety of vehicles and the best energy matching.

Keywords: CAN bus, Control system, DSP, Dynamic coupling, Hydraulic hybrid vehicle, A/D module.