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Research on the Emissions and Fuel Efficiency Sensitive Factors of Gasoline Engine Using a Support Vector Machine Coupling Sobol Method

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Journal of Energy Resources Technology, Part A: Sustainable and Renewable Energy 2025年第3期1卷 031201页

作者： Li, Yinlong Han, Yongqiang Zhang, Kechao State Key Laboratory of Automotive Simulation and Control Jilin University Changchun 130025 China

With the increasing prominence of energy and environmental issues, research in the field of internal combustion engines is becoming more and more refined. Engines are affected by the coupling of many factors, and it is necessary to decouple and quantify the impact of inputs on the objectives. In this paper, the effect of engine configuration parameters, operating conditions, and fuel parameters on fuel efficiency and emissions was investigated based on a support vector machine coupling Sobol method. The results of Sobol sensitivity analysis show that the most sensitive parameters for both brake specific fuel consumption and carbon monoxide emission are excess air ratio, total hydrocarbon emission and nitrogen oxides emission, engine load, and intake pressure; the first-order indices are 0.72, 0.27, 0.17, and 0.20, respectively. The most sensitive combustion parameters are maximum pressure in the cylinder, indicated mean effective pressure, maximum temperature in the cylinder, and high-temperature range, and the first-order indices are 0.40, 0.25, 0.39, and 0.57, respectively. It can be summarized through all the Sobol indices that, on the one hand, some input parameters, such as excess air ratio, affect fuel efficiency and emissions through the combustion process and, on the other hand, such as oxygen mass fraction directly affects carbon monoxide emission and total hydrocarbon emission by affecting the oxygen concentration in the cylinder. Sensitivity analysis based on the Sobol method coupling support vector machine was proved to be feasible and will provide valuable guidance for the optimization of internal combustion engines.

关键词： Sobol sensitivity analysis emissions support vector machine fuel efficiency agent-based model

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Energy Optimization of Extended-Range Electric Vehicles Based on Convex Programming Algorithm 6

Energy Optimization of Extended-Range Electric Vehicles Base...

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6th CAA International Conference on Vehicular control and Intelligence, CVCI 2022

作者： Hou, Shengyan Yin, Hai Li, Kai Gao, Jinwu Jilin University State Key Laboratory of Automotive Simulation and Control Department of Control Science and Engineering Changchun China Jilin University State Key Laboratory of Automotive Simulation and Control Changchun China

ISBN: (数字)9781665453745

ISBN: (纸本)9781665453745

Extended-range electric vehicle is a kind of new energy vehicles, and it has the superiorities of high electric drive efficiency, no mileage and charging anxiety. The extended-range electric vehicle has two energy power sources, the range extender and battery, and the energy management between different energy sources directly affects the energy -saving effect of the vehicle. In this paper, a powertrain system model of an extended-range electric vehicle is established. Taking fuel economy as the optimization goal, the convex programming algorithm is used to optimize the power split of powertrain system. The simulation results show that the proposed method is capable of maintaining SOC in a better operating range, and the controller improves the fuel economy by 5.53% and 8.88% compared with the rule-based strategy under the NEDC and UDDS condition. © 2022 IEEE.

关键词： Fuel economy

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ACMuse: An Actionable Multi-Stage Safety Evaluation Framework for Autonomous Vehicles 8

ACMuse: An Actionable Multi-Stage Safety Evaluation Framewor...

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8th CAA International Conference on Vehicular control and Intelligence, CVCI 2024

作者： Lyu, Zhouhang Wang, Cheng Yu, Ruilin Zhang, Yuxin State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China School of Engineering and Physical Sciences Heriot-Watt University Edinburgh United Kingdom

ISBN: (纸本)9798331504892

Safety evaluation methods for autonomous vehicles (AVs) have been recently studied. Existing methods such as sample-based methods employ criticality metrics to evaluate AV safety. They are typically restricted to single-dimension evaluations and fail to offer substantial evidence to address the critical question of how safe is safe enough. In response, we introduce an actionable multi-stage safety evaluation framework (ACMuse) designed to evaluate AV safety. This framework systematically measures safety performance through five sequential stages: safety distance assessment, collision risk check, collision avoidance capabilities assessment, collision severity assessment, and accident liability determination. Each stage is featured with specific quantitative indexes to enable an actionable framework across different test scenarios. We demonstrated the effectiveness of ACMuse by applying it to an actual Highway Pilot (HWP) system using real-world experiments. The results indicate that ACMuse offers deep and insightful safety analysis of the HWP, underscoring its ability to identify safety issues and its contributions to AV release. © 2024 IEEE.

关键词： Vehicle safety

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Requirements Decomposition for Perception Systems of Autonomous Vehicles: A Case Study of Multi-Object Tracking 27

Requirements Decomposition for Perception Systems of Autonom...

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27th IEEE International Conference on Intelligent Transportation Systems, ITSC 2024

作者： Yu, Ruilin Wang, Cheng Lv, Zhouhang Zhang, Yuxin Jilin University State Key Laboratory of Automotive Simulation and Control Changchun China School of Engineering and Physical Sciences Heriot-Watt University Edinburgh United Kingdom

ISBN: (纸本)9798331505929

Safety requirements decomposition is critical to ensure a safe autonomous vehicle (AV) by design despite the importance of safety verification and validation. This study proposes a method called QUASARS (QUAntifying SAfety Requirements using Shapley) for efficiently decomposing AV perception safety requirements into component-level and effectively quantifying them. QUASARS models the quantification of the impact of component-level faults on system-level faults as a feature importance calculation problem. We demonstrated QUASARS using a multi-object tracking system as an example and validated component-level safety requirements 100 times on the test set. After meeting the generated component-level safety requirements, the testing system was able to meet the system-level safety requirements, indicating the effectiveness of this method in decomposing system-level safety requirements into component-level. © 2024 IEEE.

关键词： autonomous vehicles Quantitative Requirements Risk Decomposition Shapely Value SOTIF

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Autonomous Vehicle Path Tracking control based on Adaptive Dynamic Programming 7

Autonomous Vehicle Path Tracking Control based on Adaptive D...

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7th CAA International Conference on Vehicular control and Intelligence, CVCI 2023

作者： Guo, Hongyan Li, Guangyao Liu, Jun Tan, Zhongqiu Yu, Dachuan Zhang, Yiming State Key Laboratory of Automotive Simulation and Control The College of Communication Engineering Jilin University Changchun China College of Communication Engineering Jilin University Changchun China State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China SAIC Motor R&D Innovation Headquarter Shanghai China

ISBN: (纸本)9798350340488

This paper presents a path tracking control method for autonomous vehicles by utilizing Adaptive Dynamic Programming (ADP). The primary goal is to enhance the path tracking performance under various longitudinal speeds. The proposed approach incorporates the consideration of nonlinear tire characteristics and establishes a nonlinear vehicle system model based on the fundamental principles of vehicle dynamics. By formulating a performance index function that captures the correlation between the vehicle's position and desired paths, the optimal control strategy is obtained using the Dual Heuristic Programming algorithm (DHP), known for its computational efficiency, within the ADP framework. The simulation results verify the effectiveness of the proposed path tracking control scheme, which can have better control performance under different vehicle speeds. © 2023 IEEE.

关键词： Adaptive Dynamic Programming Dual Heuristic Programming Intelligent Vehicle Path Tracking control

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Driving Behavior Correlation Analysis Method Based on Apriori Algorithm 5

Driving Behavior Correlation Analysis Method Based on Aprior...

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5th International Conference on Computer Systems and Communication Technology, ICCSCT 2023

作者： Sun, Tianjun Hu, Hongyu Wu, Junjie Yang, Zhengcai Changsha Automobile Innovation Research Institute Jilin University Changsha410016 China State Key Laboratory of Automotive Simulation and Control Jilin University Changchun130022 China College of Automotive Engineering Jilin University Changchun130022 China Key Laboratory of Automotive Power Train and Electronics Hubei University of Automotive Technology Shiyan442000 China

ISBN: (纸本)9781643684963

The purpose of this paper is to investigate the interactions between driver manipulation behaviors. Firstly, representative samples from driving behavior dataset were screened. Secondly, four characteristic indicators were constructed. Thirdly, the Apriori algorithm was established for correlation analysis on these four driving behaviors in order to obtain the influence relationship between different driving behaviors. Therefore, the correlation between different undesirable driving behaviors and reveals the intrinsic law of driver manipulation behavior were illustrated, which provided great significance for improving the warning effect and intervention efficiency of automotive active safety systems. © 2024 The Authors.

关键词： Correlation methods

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Shock-Resistant and Energy-Absorbing Properties of Bionic NiTi Lattice Structure Manufactured by SLM

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Journal of Bionic Engineering 2022年第6期19卷 1684-1698页

作者： Zhenglei Yu Renlong Xin Zezhou Xu Luming Sha Lixin Chen Yining Zhu Ping Liang Zhihui Zhang Zhenze Liu Qing Cao College of Communication Engineering Jilin UniversityChangchun130022China Key Laboratory of Engineering Bionics Ministry of EducationJilin UniversityChangchun130022China State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun130022China School of Agriculture Yanbian UniversityYanji133002China

Each specific structure of organisms is the best choice under specific *** excellent characteristic structures of these organisms have great application potential in the design and multi-functional optimization of energy-absorbing structures such as vehicle collisions,satellite landings,and military *** this paper,using the principle of structural bionics,using the advantages of the honeycomb structure and the light weight and high strength of beetle elytra,four bionic lattice structures are studied:CH,ZPRH,SCH and *** NiTi shape memory alloy,a unique material as the base material,samples are prepared using selective laser melting(SLM)*** comparing the test results of the quasi-static compression test with the results of the numerical simulation,it is found that compared with the other three bionic lattice structures,the SCH structure has the best energy absorption effect in the effective stroke in the test,and the specific energy absorption can reach 6.32 J/***,SCH,and IBE structures not only have good and stable deformation behavior,but also have excellent impact resistance and shape memory *** design of these structures provides a reference for the design of anti-shock cushioning structures with self-recovery functions in the future.

关键词： Engineering bionics Bionic structural design Additive manufacturing Quasi-static compression Numerical simulation Shape memory effect

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Sustainable dropwise condensation enabled ultraefficient heat pipes

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Droplet 2023年第1期2卷 64-72页

作者： Wei Chang Kai Luo Pengtao Wang Ahmed A.Abdulshaheed Chen Li State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchunChina Department of Thermal Engineering College of Automotive EngineeringJilin UniversityChangchunChina Department of Mechanical Engineering University of South CarolinaColumbiaSouth CarolinaUSA Oak Ridge National Laboratory Oak RidgeTennesseeUSA

Heat pipes play a critical role in determining the operations,safety,and energy efficiency of *** main focus to improve the heat pipe performance is on the evaporator design or wicking ***,the intrinsic limitation comes from the condenser,which is fundamentally constrained by inefficient filmwise condensation(FWC).In this study,we successfully achieved a peak effective thermal conductivity(keff)of~140 kW/(m·K)on widely used groove heat pipes by implementing sustianble dropwise condensation(DWC)and integrating with enhanced *** better understand the working mechanisms of the ultraefficient heat pipe,both the evaporator and condenser of the heat pipes have been modified *** results show that up to 296%enhancements on the keff can be achieved under various inclination angles by only inducing DWC in the condenser *** drawback of temperature fluctuations induced by DWC in smooth heat pipes appears to be effectively solved using the grooves‐wicking ***,by integrating the nanostructured evaporator,the keff of the heat pipe can be boosted up to 517%compared to conventional groove heat *** study,for the first time,demonstrates the huge potential of engineering both the condenser and evaporator simultaneously in developing ultraefficient heat pipes.

关键词： pipes integrating operations

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Real-time energy-efficient anticipative driving control of connected and automated hybrid electric vehicles

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control Theory and Technology 2022年第2期20卷 210-220页

作者： Shiying Dong Hong Chen Lulu Guo Qifang Liu Bingzhao Gao State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130025JilinChina Department of Control Science and Engineering Jilin UniversityChangchun 130025JilinChina Department of Control Science and Engineering Tongji UniversityShanghai 200092China Clean Energy Automotive Engineering Center Tongji UniversityShanghai 200092China

In this paper,we propose a real-time energy-efficient anticipative driving control strategy for connected and automated hybrid electric vehicles(HEVs).Considering the inherent complexities brought about by the velocity profile optimization and energy management control,a hierarchical control architecture in the model predictive control(MPC)framework is developed for real-time *** the higher level controller,a novel velocity optimization problem is proposed to realize safe and energy-efficient anticipative *** real-time control actions are derived through a computationally efficient *** the lower level controller,an explicit solution of the optimal torque split ratio and gear shift schedule is introduced for following the optimal velocity profile obtained from the higher level *** comparative simulation results demonstrate that the proposed strategy can achieve approximately 13%fuel consumption saving compared with a benchmark strategy.

关键词： Connected and automated vehicle Hybrid electric vehicle Anticipative driving Hierarchical control architecture Real-time solution

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Numerical simulation and experimental comparison of antagonistic shape memory alloy linear actuator for automotive applications 8

Numerical simulation and experimental comparison of antagoni...

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2022 8th International Conference on Mechanical Engineering, Materials and Automation Technology, MMEAT 2022

作者： Shen, Chuanliang Yue, Yubing Hu, Yibo Yu, Jing State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China

This paper introduces several commonly used constitutive models of SMA materials, expounds the relationship between material temperature, stress and strain from the perspective of one-dimensional model, and establishes the simulation model of reciprocating motion of SMA actuator based on the material parameters obtained from quasi-static mechanical property experiments in the previous paper. A double wire pull SMA actuator is designed and a prototype is made. The output displacement data obtained from the experiment is compared with the established simulation model to prove the accuracy of the simulation process. © Published under licence by IOP Publishing Ltd.

关键词： Linear actuators

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