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Chen Z.-Y.,State Key Laboratory of Automotive Simulation and Control | Chen Z.-Y.,Northeastern University China | Tong S.-E.,Northeastern University China | Jiao B.,Northeastern University China
Energy Education Science and Technology Part A: Energy Science and Research | Year: 2014

Energy management strategy plays a critical role in enhancing the fuel economy for a hybrid electric vehicle. Taking a parallel HEV as research object, system model was built at first and a multi-mode energy management strategy was presented. For further reducing the fuel consumption, an optimization approach using rule-based equivalent consumption minimization strategy (R-ECMS) was proposed. The optimization objective was to minimize the total energy consumption from both engine and battery storage. The optimization effect was tested in MATLAB simulation with US06, ARB02 and HWFET driving cycles, which demonstrated the energy saving mechanism of the proposed R-ECMS optimization. Simulation results indicate that the energy consumption using E-ECMS optimization strategy can be reduced by about 3.65~5.05% compared with the traditional energy management strategy without optimization. This result also indicates that the energy saving effect of R-ECMS bears partly on the chosen driving cycle. © Sila Science. All rights reserved.


Chen H.,State Key Laboratory of Automotive Simulation and Control | Chen H.,Jilin University | Gong X.,Jilin University | Hu Y.-F.,Jilin University | And 3 more authors.
Zidonghua Xuebao/Acta Automatica Sinica | Year: 2013

Automotive control technology plays a significant role for the sustainable development of the auto-industry. Under gradually fierce circumstance of competition around the world, how to strengthen our capacity of independent research and development of auto-control technology through the innovation of theory and method presents a grand challenge of our time. This paper introduces the state of the art of automotive control focusing on the power-train control, active safety control and new energy vehicles control, then summaries their common problems and finally puts forward a series of perspective for the future researches. Copyright © 2013 Acta Automatica Sinica.


Wang C.,State Key Laboratory of Automotive Simulation and Control
Chinese Control Conference, CCC | Year: 2015

The stable operation of common rail system is significant for GDI engine and the rail pressure fluctuation affects the engine performance directly. The common rail volume and the cylinder diameter are the key structure parameters of common rail system to affect the rail pressure fluctuation. To design the structure parameters of high common rail system for decreasing the rail pressure fluctuation, the high common rail system model of GDI engine is established and the random algorithm is used to obtain the optimal controller parameters. Then, through the simulation experiments, the effects of structure parameters on the stability of common rail pressure are analyzed. Finally a basis is provide for optimally designing the parameters of the cylinder diameter and common rail volume. © 2015 Technical Committee on Control Theory, Chinese Association of Automation.


Yin X.,State Key Laboratory of Automotive Simulation and Control | Yin X.,Xihua University | Zhong Y.,Xihua University | Wu X.,Xihua University | Lu H.,Xihua University
SAE Technical Papers | Year: 2014

The clutch-to-clutch gear-shift process of dual clutch transmission (DCT), which consists of the overlapping of the engagement of the incoming clutch and the disengagement of the outgoing clutch, is a vital stage for the shift quality improvement. The paper investigated an integrated control strategy for the gear-shift process that takes into account the influences of oil pressure of dual clutches and engine speed on shift quality. Firstly, the evaluation indices for the shift quality of DCT were summarized, and the factors affecting the shift quality were analyzed. Secondly, an integrated control strategy for dual clutches pressure and engine speed was proposed. Through analyzing the states of clutch in the gear-shift process and the desired traction torque for different gears, the strategies of variable oil pressure and invariable oil pressure were determined for every gear-shift process. Furthermore, a PID controller for engine speed and a fuzzy controller for clutch pressure were developed respectively. Finally, the simulation model for the gear-shift process of a wet-type DCT was built, and taking the shift jerk and the friction work as evaluation indices for the shift quality, the variable pressure strategy has been compared with the invariable pressure strategy via simulation experiments. Simulation results show that the fuzzy controller can make the actual clutch pressure trace the target pressure precisely in the gear-shift process and both the shift jerk and the friction work produced with the variable pressure strategy are less than those produced with the invariable pressure strategy for all up- and downshift processes of DCT. Copyright © 2014 SAE International.


Ke J.,State Key Laboratory of Automotive Simulation and Control | Shi W.-K.,State Key Laboratory of Automotive Simulation and Control | Qian C.,State Key Laboratory of Automotive Simulation and Control | Li G.-M.,Ningbo Huaxiang Automotive Research and Development Co. | Yuan K.,Nanjing Automobile Group Compangy Ltd
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | Year: 2015

The structure of the composite leaf spring was designed in order to match design the stiffness of a composite leaf spring used in a light bus, and the mechanical properties of glass fiber reinforced polyurethane laminate were tested. The MATLAB program, which can calculate the stiffness of composite leaf spring by using certain layer scheme, was written by MATLAB software according to the leaf spring design theory and the classic laminate theory. Then the relationship between the key parameters of layer scheme and the stiffness of composite leaf spring was calculated by using the MATLAB program. Finally, the layer scheme of the composite leaf spring was designed according to the complete computer program, which was established on the basis of the MATLAB program and the relationship between key parameters of layer scheme and the stiffness of composite leaf spring. The finite element model of the composite leaf spring was established using ABAQUS software and the stiffness of the composite leaf spring was verified by using finite element method. The bench test for the composite leaf spring was carried out. The test results demonstrate that the predicted stiffness is close to the test stiffness, so the designed method, which is significant in the promotion and application of composite leaf spring, is correct and valid. © 2015, Zhejiang University Press. All right reserved.

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