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2022中国汽车工程学会年会暨展览会

作者： Zhu Hao Yu Changhong Liu Yuanzhi Yu Dawei Liu Jiaming New Energy Development Institute China FAW Group Corporation

According to the requirement of switching the drive mode of the dual-motor hybrid vehicle during the operation of the vehicle,by analyzing the structural characteristics of the dual-motor hybrid configuration,a method is proposed to realize the entire vehicle through the coordinated control of the engine,generator and drive motor Drive mode switching control *** engine start-up process is divided into two stages:engine drag and work point *** shutdown process is divided into two stages:work point transfer and generator assisted *** serial to parallel switching process is divided into engine work point transfer and clutch coupling,The three stages of power source switching,the parallel to series switching process is divided into three stages of power source switching,clutch separation,and engine work point transfer,which can realize the flexible and smooth switching of the whole vehicle between electric,series and parallel drive *** it supports the switching intention change operation in the process of switching between different drive ***,the actual vehicle verification of the control strategy was carried *** start-up time was less than0.6 s,the peak-to-peak value of the transmission housing vibration during the start-up process was less than 10 g,and the shock degree during the series-parallel switching process was less than 8 m/*** results show that the proposed control method can fully support the drive mode switching during vehicle operation,thereby helping to achieve the goals of power,driving smoothness and fuel economy of the vehicle.

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The Research on Automated Drivability Calibration Method Based on Powertrain Dynamometers

The Research on Automated Drivability Calibration Method Bas...

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2018中国汽车工程学会年会

作者： LI Guanglei WENG Yan Ebner Thomas WANG Jun China faw group Co. LtdProduct and Research Center

The traditional drivability calibration is a very time consuming manual process and it must be done on entire *** paper discussed a highly automated drivability calibration method that can be carried out with powertrain-in-loop test system,which significantly improves drivability calibration *** this method,a DOE test plan regarding calibration parameters and operating point parameters is setup,and then these parameters are automatically modified according to the plan before each test Driving operations are also automatically performed on testbed and the objective drivability evaluation tool gives scores for each *** the ratings are restored and the mathematical models are created automatically basing on these *** optimization results and the calibrated new maps are obtained basing on the *** ECU parameter calibration test dealing with long response delay was performed on powertrain testbed to verify this method and the results proved that this method had effectively and efficiently improved the drivability performance of the tested vehicle for the target problems.

关键词： drivability objective automated calibration powertrain

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A Bionic Study on the Anti-erosion Mechanism of Laudakia stoliczkana:Experimental and Numerical Aspects

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Journal of Bionic Engineering 2019年第5期16卷 882-893页

作者： Ping Liang Youhong Sun Sihan Liu Tianwei Liang Yuhang Zhang Youwei Wang Luquan Ren Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun 130022China Construction Engineering College Jilin UniversityChangchun 130000China School of Mechanical and Aerospace Engineering Jilin UniversityChangchun 130022China China faw group Corporation R&D Center Changchun 130000China

The scales of body surface of Laudakia stoliczkana have the morphology of convex hulls,which are arranged in groove structure in macroscopic *** body surface skin is mainly composed of the"soft"layer of keratin and the"hard"layer of the cuticle covering on the"soft"*** coupling effect of the scale morphology and skin's structure gives Laudakia stoliczkana the excellent ability to resist the sand erosion in desert *** by the convex surface morphology and the composite structure of the"soft"and"hard"layers of the skin of Laudakia stoliczkana^the coupling bionic samples are febricated and the erosion resistance performance is *** test results show that the coupling bionic samples have good erosion resistance perfbimance and the samples with spherical convex hull exhibit the best erosion resistance ***,based on the theory of stress wave propagation in solid the numerical simula tions of particles impacting to the coupling bionic samples and bionic layered structure are done respectively and the anti-erosion me chanism of the bionic layered structure is *** simulation results are consistent with the experimental results,which show that the coupling bionic samples can effectively reduce the amplitude of the incident stress wave,and thus can prevent the failure of samples.

关键词： coupling bionic anti-erosion sand blasting test stress wave bionic layered structure

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Research on Steer-by-wire Control Algorithm Based on Signal Reconstruction

Research on Steer-by-wire Control Algorithm Based on Signal ...

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2022中国汽车工程学会年会暨展览会

作者： Li Chunshan Wang Yu Zhang Jian Gao Jingbo Zhou Tian Xu Danlin Gong Bojian CHINA faw group CO.LTD Intelligent Connected Vehicle Development Institute

Steer-by-wire(SBW) is a hot spot in the development of intelligent vehicle in the *** can achieve stability at medium and high speeds as well as agility at low *** biggest difficulty of SBW is to meet the performance and security requirements at the allowable *** order to solve the problem of high cost in improving the signal redundancy through multi-sensor arrangement,a control algorithm of SBW based on signal reconstruction is *** whole vehicle signal network is constructed by multi-model estimation method to improve the robustness of the *** road feeling feedback torque simulation algorithm based on the fusion of dynamic reconstruction and load observation was *** simulation and real vehicle test were used to verify the method of Steer-bywire *** results show that the method has good accuracy.

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Microstructure and mechanical properties of die-cast AZ91D magnesium alloy by Pr additions

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Transactions of Nonferrous Metals Society of China 2010年第B07期20卷 435-438页

作者：崔晓鹏刘海峰孟健张德平 Department of Materials Science and Engineering Key Laboratory of Advanced Structrural Materialsof Ministry of EducationChangchun University of Technology State Key Laboratory of Rare Earth Resources Utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences R&D Centre of Foundry Corporation FAW Group Corporation

Mg-9Al-xPr(x=0.4,0.8 and 1.2,mass fraction,%)magnesium alloys were prepared by high-pressure die-casting *** effects of Pr on the microstructures of die-cast Mg-9Al based alloy were investigated by XRD and ***-like Al11Pr3 phase and polygon Al6Mn6Pr phase are found in the *** 0.4%Pr addition,fine needle-like Al11Pr3 phase and a small amount of polygon Al6Mn6Pr phase near the grain boundary are found in the *** Pr addition to 0.8%, lots of coarse needle-like Al11Pr3 phase within grain and polygon Al6Mn6Pr phase on grain boundary are *** increasing Pr addition,the size of needle-like Al11Pr3 phase decreases,while the size of polygon Al6Mn6Pr relatively *** mass fraction of Pr at around 0.8%is considered to be suitable to obtain the optimal mechanical *** optimal mechanical properties are mainly resulted from grain boundary strengthening obtained by precipitates and solid solution.

关键词： praseodymium magnesium alloy microstructure mechanical properties

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