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Diesel Engine SCR control: Current Development and Future Challenges

Emission control Science and Technology 2015年第2期1卷 121-133页

作者： Yuan, Xinmei Liu, Hongqi Gao, Ying State Key Lab. of Automotive Simulation and Control Jilin University ChangchunJilin130025 China

To meet increasingly stringent emission legislations, selective catalytic reduction (SCR) becomes an essential aftertreatment technique. This paper presents a comprehensive overview of the current development and future challenges of SCR control technologies. In this paper, SCR system hardware configurations are introduced, modeling and calibration of the SCR converter are provided, and current control strategies are summarized and reviewed. Finally, primary areas driving the future of SCR control research are discussed. © 2015, Springer SIP, AG.

关键词： Selective catalytic reduction

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The target vehicle movement state estimation method with radar based on kalman filtering algorithm

The target vehicle movement state estimation method with rad...

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2013 International Conference on Precision Mechanical Instruments and Measurement Technology, ICPMIMT 2013

作者： Jia, Xin Wu, Zuo Long Guan, Hsin State Key Lab of Automobile Simulation and Control Jilin University Changchun China

ISBN: (纸本)9781629933405

In this paper, based on Kalman filtering algorithm, a method of target vehicle motion state radar estimation with radar(or lidar) is presented. The state equations is established based on rigid plane dynamics theory, and then with a Kalman filter to do radar data processing, the position, velocity and acceleration of the target vehicle can be estimated at the same time, so that to cover the shortage that acceleration information can not be gained with radar system. Through simulation and field tests it is verified that the detection accuracy of position and velocity of target vehicle is increasing, and the acceleration of target vehicle can be estimated effectively and accurately. © 2013 Trans Tech Publications Ltd, Switzerland.

关键词： Kalman filters

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Influence of engine cabin simplification on aerodynamic characteristics of car 3

Influence of engine cabin simplification on aerodynamic char...

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3rd International Conference on key Engineering Materials and Computer Science, KEMCS 2014

作者： Hu, Xing Jun Chang, Jing State Key Lab of Automobile Simulation and Control Jilin University Changchun China

ISBN: (纸本)9783038352846

In order to analyze the impact of engine cabin parts on aerodynamic characteristics, the related parts are divided into three categories except the engine cooling components: front thin plates (average thickness of 2mm), bottom-suspension and interior panels. The aerodynamic drag coefficient(Cd) were obtained upon the combination schemes consisting of the three types of parts by numerical simulation. Results show that Cd by simulation is closer to the test value gained by the wind tunnel experiment when front thin plates were simplified to the two-dimensional interface with zero thickness. The error is only 5.23%. Meanwhile this scheme reduces grid numbers, thus decreasing the calculating time. As the front thin plates can guide the flow, there is no difference on the Cd values gained from the model with or without bottom-suspension or interior panels when the engine cabin contains the front thin plates;while only both bottom-suspension and interior panels are removed, the Cd value can be reduced when the cabin doesn't contain the front thin plates. © (2014) Trans Tech Publications, Switzerland.

关键词： Suspensions (fluids)

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Flexible truck frame dynamic model and its parameters identification

Flexible truck frame dynamic model and its parameters identi...

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WASE International Conference on Information Engineering, ICIE

作者： Qi, Haizheng Ji, Peng State Key Lab. of Automobile Dynamic Simulation Jilin University Changchun China

ISBN: (纸本)9780769540801

Truck dynamic simulation model including the flexible frame can be a more accurately description of the vehicle handling and ride. In this paper, an assembly characteristic oriented flexible truck frame dynamic simulation model and its parameters equivalent dynamic identification method were presented. Model parameters, including natural frequencies, moment of inertias, torsional stiffness and damping ratio, were identified by the frequency response function. The model was embedded into vehicle dynamic model for handling simulation. The simulation result indicates that flexible frame parameters which obtained by the equivalent dynamic identification method could described the flexible truck frame dynamic characteristic well. © 2010 IEEE.

关键词： Dynamic models

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A vision recognition method of wheel's pose and position parameters in bench testing

A vision recognition method of wheel's pose and position par...

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2nd International Conference on Mechanical Engineering, Industrial Electronics and Informatization, MEIEI 2013

作者： Jia, Xin Guan, Hsin State Key Lab of Automobile Simulation and Control Jilin University Changchun 130025 China

ISBN: (纸本)9783037858905

IA method is proposed here to recognize wheel's pose and position parameters with computer vision aiming to the need of measuring wheel moving track in suspension bench testing. Firstly, several markers are fit on the target wheel manually. Secondly, image coordinates of character points is calculated with image processing method and least square ellipse fitting algorithm. At last, wheel's pose and position parameters are calculated with rigid body motion POSIT algorithm, and then wheel moving track is measured in test. The algorithm of wheel's pose and position parameters in bench testing based on the computer vision here will supply the base under the realization of the moving wheel's pose and position parameters recognizing in real time. © (2013) Trans Tech Publications, Switzerland.

关键词： Computer vision

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Driving intention intelligent identification method for hybrid vehicles based on fuzzy logic inference

Driving intention intelligent identification method for hybr...

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2010 International Symposium on Computational Intelligence and Design, ISCID 2010

作者： Xianzhi, Tang Qingnian, Wang State Key Lab. of Automobile Dynamic Simulation Jilin University Changchun Jilin China

ISBN: (纸本)9780769541983

This paper presents a driving intention intelligent identification method for hybrid vehicles based on fuzzy inference. In this paper, a fuzzy logic inference system is developed to identify driving intention. The membership functions and rules of fuzzy logic inference system are built for intention identification and the simulation is done in different driving conditions. The simulation results show that the fuzzy logic inference system can identify driving intention accurately. © 2010 IEEE.© 2010 IEEE.

关键词： Fuzzy inference

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Study on errors compensation of a vehicular MEMS accelerometer

Study on errors compensation of a vehicular MEMS acceleromet...

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2005 IEEE International Conference on Vehicular Electronics and Safety

作者： Guan Xin, F. Yan Dong, S. Gao Zhenhai, T. Jilin University State Key Lab. of Automobile Dynamics Simulation Changchun Jilin China

ISBN: (纸本)0780394356

Based on Micro Electronic Mechanical System technology, the micro inertial sensors are introduced, and the research and application conditions of MEMS micro accelerometers are also analyzed. Taking auto navigation and testing system as an example, simple mathematical models and compensational methods are developed to correct sensor errors and the validity is evaluated by experimental verification. © 2005 IEEE.

关键词： Accelerometers

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Vehicle chassis coordinated control strategy based on model predictive control method

Vehicle chassis coordinated control strategy based on model ...

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2010 IEEE International Conference on Information and Automation, ICIA 2010

作者： Zong, Changfu Liang, Heqi Tian, Chengwei Hu, Rufei State Key Lab. of Automobile Dynamic Simulation Jilin University Changchun 130022 China

ISBN: (纸本)9781424457021

With the chassis electronic technology evolving, the chassis control technologies for active safety have been widely used. Through active intervention in the vehicle horizontal and vertical dynamics, electronic control systems can improve vehicle stability and handling greatly, thereby ensuring the safe driving of vehicles. This article will coordinate active steering, active braking and active suspension based on model predictive control and logic control to achieve the coordination among the horizontal and vertical dynamics, and further enhance the vehicle's active safety level. We also conducted simulation , and result shows that the control strategy can effectively improve vehicle active safety. ©2010 IEEE.

关键词： Model predictive control

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Effect of differential modeling on handling and stability

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FISITA 2012 World Automotive Congress

作者： Huang, Rui Zhan, Jun Wu, Jungang China Automotive Engineering Research Institute Co. Ltd. Shanghai China State Key Lab. of Automobile Simulation and Control Jilin University Jilin China

ISBN: (纸本)9783642337949

Research target: There are exists many principle types of limited slip differential. If simplify limited slip differential model to open differential, vehicle handling and stability simulation results will be uncorrected. So the paper's target is to build several principle differentials, prove that: different differential have different effects to handling and stability, different transfer case and drive style have the same effects additionally. Research method: Build several limited slip differential models and vehicle dynamic models, respectively;then, simulate different drive style vehicle with different differential or transfer case on the Steady state Cornering and steering wheel angle step input maneuver;compared the simulation results to prove the conclusion of the paper. Research production: Through research and analyses, build up several principle limited slip differential and transfer case models rightly, and connected with vehicle model perfectly. Innovation: Through vehicle dynamic simulation, it is easy for us to find effects of limited slip differential to handling and stability. Other papers in the field have not cover limited slip differential, transfer case model and vehicle drive style, comprehensively, this paper has researched all of those models, getting some general conclusion at last. Insufficiency: This paper shows different differential models how to affect handling and stability, but lacking of correlation of the corresponding differential and vehicle test. Conclusion: The compared simulation analysis of vehicle with different forms of differential and drive type shows that: limited slip differential in the low friction coefficient road affects more obviously, and have more effects to front-drive vehicle, different differential models will have a significant impact to handling and stability. Remark: The work was completed with the assistance of National 863 plan (serial number is 2012AA111801). © 2013 Springer-Verlag.

关键词： Friction

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Development and integration of Kmas/One-step with UG/NX

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Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) 2006年第SUPPL. 1期36卷 60-64+106页

作者： Wang, Jing-Qi Jin, Chun-Ning Zhang, Xiang-Kui Liao, Hai-Wen Shi, Ye Liu, Bo Procurement Agency in FAW of PLA Changchun 130011 China State Key Lab. of Automobile Dynamic Simulation Institute of Auto-body and Die Engineering Jilin University Changchun 130022 China

Nowadays one of the development trends in CAE commercial code is the software integration with CAD system. Easy-form, which is based on Kmas/One-step and UG/NX embedded integration, is this kind of code. The development progresses and applications of the Easyform and UG/NX are described in this paper. The integrated code is built in the classic development tools and design methods of UG/NX. The embedded integration is achieved by the use of UGs preprocess and postprocess techniques to call Kmas/One-step solver DLL. This paper describes the design flow and the key techniques, such as UGs development tools, DLL etc., and demonstrates the program with idiographic die parts. As typical CAD-CAE integration software, Easyform achieves seamless link with CAD. Designers could enforce CAE analysis immediately after CAD is finished, and the design process would be improved and the development lead-time would be reduced.

关键词： Software engineering

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