Updated on 2025/04/17

写真a

 
YANG, Wei hsiang
 
Affiliation
Faculty of Science and Engineering, Environmental Research Institute
Job title
Researcher(Associate Professor)
Degree
博士(工学) ( 早稲田大学 )
修士(工学) ( 早稲田大学 )

Research Experience

  • 2023.04
    -
    Now

    Waseda University   Environmental Research Institute

  • 2019.04
    -
    2023.03

    Waseda University   Faculty of Science and Engineering

  • 2018.04
    -
    2019.03

    Waseda University   Faculty of Science and Engineering

  • 2015.04
    -
    2018.03

    Waseda University   Faculty of Science and Engineering

Professional Memberships

  •  
     
     

    SOCIETY OF AUTOMOTIVE ENGINEERS OF JAPAN

Research Areas

  • Electron device and electronic equipment / Environmental load reduction and remediation

Research Interests

  • Fuel cell vehicle

  • Environmental performance evaluation

  • energy management

  • plug-in hybrid vehicle

  • electric vehicle

Awards

  • ベスト・ペーパー賞

    2023.03   自動車技術会関東支部学術研究講演会   電動化メリットの明確化を目的とした路線バス速度変化パターンの実態調査(第1報) ~路線バス特有の停留所発進加速/停止減速に着目した分析~

    Winner: 黄施豪, 方亦園, 徐天奇, 楊イ翔, 紙屋雄史, 宮城実, 久保山貴之

  • ベスト・ペーパー賞

    2017.03   自動車技術会関東支部学術研究講演会   プラグインハイブリッド自動車における低炭素効果の走行距離依存性に対する考察

    Winner: 鈴木智大, 楊イ翔, 紙屋雄史, 大聖泰弘

  • ベスト・プレゼンテーション賞

    2014.03   自動車技術会関東支部学術研究講演会   プラグインハイブリッド自動車の動力システムモデリング詳細化に関する研究:インバータと昇圧コンバータの損失モデリング詳細化の検討

    Winner: 楊イ翔

  • ベスト・ペーパー賞

    2014.03   自動車技術会関東支部学術研究講演会   プラグインハイブリッド自動車の動力システムモデリング詳細化に関する研究:インバータと昇圧コンバータの損失モデリング詳細化の検討

    Winner: 楊イ翔, 紙屋雄史, 大聖泰弘

 

Papers

  • A Passive Experiment on Route Bus Speed Change Patterns to Clarify Electrification Benefits

    Yiyuan Fang, Wei Hsiang Yang, Yushi Kamiya

    World Electric Vehicle Journal   16 ( 3 )  2025.03  [Refereed]

     View Summary

    In addition to the widely recognized benefits of reducing carbon emissions and protecting the environment, the authors believe that bus electrification has potential advantages in enhancing driving safety, improving passenger comfort, and reducing driver fatigue—areas that have not yet been sufficiently studied and emphasized. Safety and comfort are fundamental objectives in the continuous development of transportation systems. They are directly and closely related to both passengers and drivers and are among the top priorities when individuals choose their mode of transportation. Therefore, these aspects deserve broader and more in-depth attention and research. This study aims to identify the potential advantages of route bus electrification in terms of safety and comfort. The results of a passive experiment on the speed profile of buses operating on actual routes are presented here. Firstly, we focus on the acceleration/deceleration at the starting/stopping stops, specifically for regular-route buses, and obtain the following information: I. Starting acceleration from a bus stop is particularly strong in the second half of the acceleration process, being suitable for motor-driven vehicles. II. The features of the stopping deceleration at a bus stop are “high intensity” and “low dispersion”, with the latter enabling the refinement of regenerative settings and significantly lowering electricity economy during electrification. And we compare the speed profile of an electric bus with those of a diesel bus and obtain the following information: III. Motor-driven vehicles offer the advantages of “high acceleration performance” and “no gear shifting”, making them particularly suitable for the high-intensity acceleration required when route buses depart from stations. This not only simplifies driving operations but also enhances lane-changing safety. And by calculating and analyzing the jerk amount, we could quantitatively demonstrate the comfortable driving experience while riding on this type of bus where there is no shock due to gear shifting. IV. While the “high acceleration performance” of motor-driven vehicles produces “individual differences in the speed change patterns”, this does not translate to “individual differences in electricity consumption”, owing to the characteristics of this type of vehicle. With engine-driven vehicles, measures such as “slow acceleration” and “shift up early” are strongly encouraged to realize eco-driving, and any driving style that deviates from these measures is avoided. However, with motor-driven vehicles, the driver does not need to be too concerned about the speed change patterns during acceleration. This characteristic also suggests a benefit in terms of the electrification of buses.

    DOI

    Scopus

  • Developing a Simple Electricity Consumption Prediction Formula for the Pre-Introduction Prediction for Electric Buses

    Yiyuan Fang, Wei Hsiang Yang, Yuto Ihara, Yushi Kamiya

    World Electric Vehicle Journal   16 ( 2 )  2025.02  [Refereed]

     View Summary

    This study aims to develop a theoretical formula to help bus operators easily predict electricity consumption while introducing a certain type of electric bus on a predetermined route. The formula requires vehicle-side information (such as air resistance coefficient, rolling resistance coefficient, vehicle weight, powertrain efficiency, kinetic energy recovery rate, auxiliary equipment electricity consumption, and other vehicle-related data) for construction and road-/operation-side information (such as average driving speed, number of starts and stops, road gradients, and other road-/operation-related data) for prediction. First, herein, as a basic study to construct the theoretical formula, a developed electric bus and its vehicle electricity consumption simulator are employed. We then perform a comparative analysis considering the comparison of loss between the actual operation on public roads and the assumed constant velocity when running on flat roads. Next, we develop theoretical equations for the generalization of velocity and gradient changes and simplified modeling of electricity consumption prediction. Considering the burden of information collection on operators, we categorize it into three stages. In this paper, we first organize the minimum necessary road-/operation-side information (route/operational indicators). Next, we propose a theoretical formula for electricity consumption prediction constructed based on vehicle-side information. Finally, we validate the validity and accuracy of the constructed formula using electric buses and their on-road operational data that we developed earlier. The verification results showed that, after obtaining vehicle-side and road-/operation-side information, the theoretical formula constructed in this study achieved an electricity consumption prediction with an average error of 6% (high-accuracy method). This result demonstrates the practicality of using the theoretical formula to predict the electricity consumption/range of electric buses operating on specific routes.

    DOI

    Scopus

    2
    Citation
    (Scopus)
  • Assessment of Output Control Methods on Fuel Cell Lifetime in Fuel Cell Hybrid Test Train

    Yoneyama Takashi, Wen Minhao, Bao Yida, Xu Sihai, Yang Wei-hsiang, Kamiya Yushi, Ogawa Kenichi, Kaneko Manato

    Transactions of Society of Automotive Engineers of Japan   56 ( 2 ) 223 - 228  2025  [Refereed]

     View Summary

    To assess the impact of fuel cell output control methods on the lifetime of a fuel cell in the fuel cell hybrid test train, we developed a predictive model for the fuel cell output voltage degradation. We utilized the predictive model to evaluate the differences in fuel cell output control methods that affect the lifetime of the fuel cell. And we studied the effects of degraded fuel cell on the vehicle performance and the fuel economy.

    DOI

  • Study of Optimal Thermal Management System for Battery based on Vehicle System 1D Simulation Model (Second Report)

    Hato Yuya, Liu Poyuan, Yang Wei-Hsiang, Hirota Toshio, Kamiya Yushi, Sato Kiyotaka

    Transactions of Society of Automotive Engineers of Japan   56 ( 1 ) 128 - 133  2025  [Refereed]

     View Summary

    Thermal management for the lithium-ion battery in the electric vehicle, which controls the battery temperature, is important to counteract degradation and overheating of the battery. To design an optimal thermal management system, it is effective to use a vehicle system 1D simulation model. In the previous report, we studied several thermal management systems for the battery electric vehicle and evaluated the battery warm-up performance at cold start of these systems based on this model. In this report, we improved the battery thermal model and these studied systems. Then we analyzed the battery cooling performance at high temperature and the quick charge performance at low temperature of each system.

    DOI

  • Optimization of Speed Change Pattern for Improving Electricity Consumption of Electric Heavy-duty Vehicles and Verification through Actual Vehicle Chassis Dynamometer Testing- Derivation of Battery Internal Resistance and Cable Resistance Based on Actual Measurements and Additional Consideration of Those Losses -

    Fang Yiyuan, Morohashi Youta, Yang Wei-hsiang, Kamiya Yushi

    Transactions of Society of Automotive Engineers of Japan   56 ( 1 ) 122 - 127  2025  [Refereed]

     View Summary

    In this study, we focused on the eco-driving speed change pattern of electric heavy-duty vehicles. In the first report, we performed optimization calculations for minimizing vehicle driving energy consumption starting from the energy output of vehicle batteries. We also used chassis dynamometer test data to verify the optimization results. In this paper, we report results of additional studies with consideration of the battery internal loss and the cable loss.

    DOI

  • A Study on the Effect of Multivariable Control for Performance Improvement of a Fuel Cell Hybrid Test Train

    Yoneyama Takashi, Yoshioka Shun, Bao Yida, Wen Minhao, Yang Wei-hsiang, Kamiya Yushi, Kashiwagi Takayuki, Ogawa Kenichi, Kaneko Manato, Kanzaki Manato

    Transactions of Society of Automotive Engineers of Japan   55 ( 6 ) 1102 - 1107  2024  [Refereed]

     View Summary

    The fuel cell hybrid test train requires methods to control fuel cell output power. The acceleration and regenerative-brake performance of the train varies with the SOC of the battery. And the energy consumption also varies with the passenger occupancy and the ambient temperature. Therefore, we studied the traction performance and fuel consumption depending on the difference of the control methods and the number of parameters to be considered with using a driving energy simulator.

    DOI

  • Development of a Driving Energy Simulator for a Fuel Cell Hybrid Test Train

    Yoneyama Takashi, Tanuma Hidehiro, Yoshioka Shun, Yang Wei-hsiang, Kamiya Yushi, Kashiwagi Takayuki, Yamada Takamasa, Kaneko Manato, Kanzaki Manato

    Transactions of Society of Automotive Engineers of Japan   55 ( 3 ) 430 - 435  2024  [Refereed]

     View Summary

    We developed a driving energy simulator to study fuel cell output control of a hybrid test train. The simulator takes into account that the powering and regenerating performance of the test train depends on the SOC of the battery. The simulator was validated by confirming that it matched the driving test data. And the running simulation was carried out on a 15 km virtual route to show the efficiency and fuel consumption of the fuel cell.

    DOI

  • Optimization of Speed Change Pattern for Improving Electricity Consumption of Electric Heavy-duty Vehicles and Verification through Actual Vehicle Chassis Dynamometer Testing

    Fang Yiyuan, Huang Shih-hao, Kobayashi Kimiyoshi, Yang Wei-hsiang, Kamiya Yushi

    Transactions of Society of Automotive Engineers of Japan   55 ( 1 ) 14 - 19  2024  [Refereed]

     View Summary

    In this study, we focused on the eco-driving of electric heavy-duty vehicles. The target vehicle is an electric truck developed by our research team. Using the parameters of the truck and developed speed pattern optimization simulator, we derived EV eco-driving speed change patterns. Compared to eco-driving of diesel vehicles, we found several different characteristics. Specifically, we examined the details of the result “acceleration interval with allowed strong acceleration,” which was significantly different from that of diesel vehicles. We confirmed with chassis dynamometer measured data that the strong acceleration of EV will not cause significant deterioration in vehicle efficiency.

    DOI

  • Speed Change Pattern Optimization for Improving the Electricity Consumption of an Electric Bus and Its Verification Using an Actual Vehicle

    Yiyuan Fang, Wei Hsiang Yang, Yushi Kamiya, Takehito Imai, Shigeru Ueki, Masayuki Kobayashi

    World Electric Vehicle Journal   15 ( 1 )  2024.01  [Refereed]

     View Summary

    In this study, we focused on the eco-driving of electric vehicles (EVs). The target vehicle is an electric bus developed by our research team. Using the parameters of the bus and speed pattern optimization algorithm, we derived the EV’s eco-driving speed pattern. Compared to the eco-driving of internal combustion engine vehicles (ICVs), we found several different characteristics. We verified these characteristics with actual vehicle driving test data of the target bus, and the results confirmed its rationality. The EV’s eco-driving method can improve electricity consumption by about 10–20% under the same average speed.

    DOI

    Scopus

    3
    Citation
    (Scopus)
  • Detailed Analysis of Regenerative Energy of Electric Bus Running on Expressways

    Hirokazu Miyoshi, Wei Hsiang Yang, Yushi Kamiya, Shuichi Obayashi

    2019 IEEE 4th International Future Energy Electronics Conference, IFEEC 2019    2019.11

     View Summary

    Our research group designed two electric buses, a small-sized bus for driving on ordinary roads, and a medium-sized bus for driving on expressways. Analyzing the data obtained from verification test, we found a characteristic phenomenon related to regenerative energy on the expressway. In this paper, analysis of evaluation related to this phenomenon by simulating three different driving routes with the medium-sized electric bus is summarized.

    DOI

    Scopus

  • Distance Traveled Dependence of Environmental Performance of Plug-In Hybrid Vehicles: Validations with Series-hybrid Vehicle Simulation

    Wei Hsiang Yang, Cheng Ping Yang, Shohei Shinta, Yushi Kamiya

    2019 IEEE 4th International Future Energy Electronics Conference, IFEEC 2019    2019.11

     View Summary

    In this paper, a series-type plug-in hybrid vehicle simulator is used to validate the distance traveled dependence of environmental performance of the plug-in hybrid vehicles proposed in our previous paper is established. First, the characteristics of the distance traveled dependence such as cross-point and the difference of CO2 emissions between AE and BLD controls are confirmed. Also, the appropriateness and usefulness of the propositions, including the CD mode control selection policy, the optimal BLD control, and the indicator BCPI (blended control performance indicator), which can simply evaluate the effect of BLD control, are valid.

    DOI

    Scopus

  • Detailed Analysis of Regenerative Energy for Electric Bus Running on Expressways

    Yang Wei-Hsiang, Liu Hanlin, Ihara Yuto, Kamiya Yushi, Daisho Yasuhiro, Obayashi Shuichi

    Transactions of Society of Automotive Engineers of Japan   50 ( 2 ) 365 - 370  2019.03  [Refereed]

     View Summary

    Our research group designed and made a trial creation of a medium-sized electric bus for expressways and conducted a demonstration test on Metropolitan Expressway Bay Shore Route for approximately one year. In this paper, analyzed results focused on the regenerative energy made by electric heavy-duty vehicles running on the expressway will be summarized.

    DOI CiNii

  • Dependence of environmental performance of plug-in hybrid vehicles on distance traveled

    Wei Hsiang Yang, Tomohiro Suzuki, Yushi Kamiya, Yasuhiro Daisho

    2017 IEEE Vehicle Power and Propulsion Conference, VPPC 2017 - Proceedings   2018-January   1 - 6  2018.04  [Refereed]

     View Summary

    Plug-in hybrid vehicles (PHVs) have two driving modes, which are known as charge-depleting (CD) mode and charge-sustaining (CS) mode. The environmental performance of a PHV differs greatly based on the travel distance when the PHV switches from the CD mode to the CS mode. This paper focuses on the low-carbon effect and energy cost reduction effect of PHVs and numerically describes the dependence of the effects on the distance traveled. It also accounts new knowledge obtained through a detailed analysis and examination of the mathematical equations.

    DOI

  • 85 kHz band 44 kW wireless rapid charging system for field test and public road operation of electric bus

    Shuichi Obayashi, Tetsu Shijo, Masatoshi Suzuki, Fumi Moritsuka, Kenichirou Ogawa, Koji Ogura, Yasuhiro Kanekiyo, Masaaki Ishida, Toru Takanaka, Nobumitsu Tada, Fumiaki Takeuchi, Shunsuke Take, Yoshihiko Yamauchi, Wei Hsiang Yang, Yushi Kamiya

    31st International Electric Vehicle Symposium and Exhibition, EVS 2018 and International Electric Vehicle Technology Conference 2018, EVTeC 2018   10 ( 2 )  2018

     View Summary

    Wireless charging technology for heavy-duty vehicles has been investigated for eco-friendly transportation. We present a new wireless power transfer system for 44 kW rapid charging of electric buses. The transmission distance between the charging pads is from 10 to 13 cm. The large air gap can be fulfilled by the ordinary kneeling function, equipped on most low-floor buses. Dual-block parallel transmission with opposite-phase-current-feeding suppresses magnetic radiation. The system operates in the common 85 kHz band with the light-duty vehicle system. The result of the field test and the public road operation of two electric buses confirm the CO2 reduction effect described.

    DOI

    Scopus

    9
    Citation
    (Scopus)
  • Design and evaluation of 'Short-range Frequent-charging-type' and 'Night-charging-type' BE bus

    Wei-Hsiang Yang, Isao Tsukui, Eisuke Izutsu, Yushi Kamiya, Yasuhiro Daisho

    2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia, IFEEC - ECCE Asia 2017     1628 - 1633  2017.07

     View Summary

    The two opposite concepts of BE bus (battery-electric bus) which were 'Short-range Frequent-charging-type' and 'Night-charging-type' low-floor buses, were designed and evaluated. Firstly, the current technical level of battery and charging equipment had taken into account to conduct the vehicle design of both BE buses. In additional, the ideal performances of battery and charging equipment for fully substituting the highly used diesel buses in the very densely packed city transportation routes would be clarified in the paper.

    DOI

    Scopus

    2
    Citation
    (Scopus)
  • Li-ion Battery Deterioration Evaluation of Short Range Frequent Charging Electric Bus over Long-term Operation in Cold Region

    Wei-Hsiang Yang, Zhe-Dong Wu, Kenichiro Eda, Yushi Kamiya, Yasuhiro Daisho

    2016 IEEE 2ND ANNUAL SOUTHERN POWER ELECTRONICS CONFERENCE (SPEC)    2016  [Refereed]

     View Summary

    A long-term operation test in cold region of electric buses on public roads was performed in Nagano prefecture as a project of the Japan Ministry of the Environment from 2011 to 2014. For this project, the short-range frequent charging type electric buses, "Waseda Electric Buses (WEBs)" were developed. WEB-3, one of the test vehicles, was driven for 42,114 km over 902 days and charged 4,298 times. In this paper, the following was obtained. (1) The battery performance deterioration is measured and proofed to be predictable. (2) One strategy is advised for expanding battery lifetime. (3) Even started the operation at sub-zero environment, the performance of vehicle was not affected.

    DOI

    Scopus

    3
    Citation
    (Scopus)
  • Performance Evaluation of Short Range Frequent Charging Electric Bus «wEB-3» over Long-Term Operation

    Wei Hsiang Yang, Kenichiro Eda, Yushi Kamiya, Toshio Hirota, Yasuhiro Daisho

    2015 IEEE Vehicle Power and Propulsion Conference, VPPC 2015 - Proceedings    2015.12  [Refereed]

     View Summary

    A long-term operation test of electric buses on public roads was performed in Nagano as part of a project of the Japan Ministry of the Environment from 2011 to 2014. For this project the short-range frequent-charging type electric buses, "Waseda Electric Buses (WEBs)" were developed. WEB-3, one of the test vehicles, was driven for 41,724 km without any major problems and had advantages to reduce 28-42% of CO2 emissions and 57-64% of energy costs, compared to conventional diesel buses. The battery performance deterioration is also confirmed to be predictable, therefore two suitable strategies is advised for expanding battery lifetime.

    DOI

    Scopus

    3
    Citation
    (Scopus)
  • Performance degradation prediction and cell balance control algorithm construction of lithium iron phosphate battery

    Yasuhiro Ueeda, Koichiro Taniguchi, Shoichi Inami, Genki Kaneko, Toshio Hirota, Wei Hsiang Yang, Yushi Kamiya, Yasuhiro Daisho

    2014 IEEE Vehicle Power and Propulsion Conference, VPPC 2014    2015.01  [Refereed]

     View Summary

    Various studies were conducted from the aspects of both the battery cells and the module with the aim of making more effective use of the battery capacity. As a result, after 77 cycles of driving and rapid charging, the capacity degradation of the battery module as a whole was 7.7 % and it was determined that the cause of this additional 0.7 % degradation of the capacity was the loss of cell balance. In addition, by adopting module balance coefficient (a) that was proposed as an indicator to show the available percentage of the lowest capacity cell in the module, new cell balancing rules were created that do not significantly affect the convenience of vehicle operation.

    DOI

    Scopus

    1
    Citation
    (Scopus)
  • Detailed modeling of motor system of plug-in hybrid vehicle: Study of detailed modeling of inverter and boost converter losses

    Wei Hsiang Yang, Hiroki Sato, Yushi Kamiya, Yasuhiro Daisho

    2014 IEEE Vehicle Power and Propulsion Conference, VPPC 2014    2014  [Refereed]

     View Summary

    This paper addresses the method of detailing the motor system including the inverter and the boost converter of plug-in hybrid vehicles (PHVs). In the past, we had to use the actual measurement data such as efficiency map to calculate the loss of a motor system. However, by estimating the output current of the motor system, allows us to separate the one loss into losses caused by the inverter, the boost converter and the motor. Based on the separation of the losses, we can then build a multi-voltage motor system or estimate the losses of the different ranks of vehicles.

    DOI

    Scopus

    2
    Citation
    (Scopus)

▼display all

Research Projects

  • Performance Superior Domain Clarification of Various Electric drive Buses

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research

    Project Year :

    2022.04
    -
    2024.03
     

Misc

  • A Low-Carbon Charging Operation Planning Approach for Electric Buses

    Haruka Nakano, Yu Fujimoto, Nanae Kaneko, Soma Sugano, Wei Hsiang Yang, Yuto Ihara, Yasuhiro Hayashi

    13th International Conference on Renewable Energy Research and Applications, ICRERA 2024     457 - 462  2024

     View Summary

    We propose a charging operation planning method to reduce carbon emissions from electric bus charging. The proposed method prioritizes charging during periods of low carbon intensity, considering life-cycle carbon dioxide emissions. This is determined by the amount of local photovoltaic (PV) surplus power and the proportion of renewable energy in the entire grid generation. Simulations based on real-city data evaluated the proposed charging method's effectiveness in reducing emissions by prioritizing grid power charging during low-emission periods while utilizing PV surplus power. The proposed method significantly leverages local PV generation and prioritizes charging during low carbon intensity periods, reducing the emission by up to 81% against overnight charging. Especially in adverse weather conditions, the method effectively decarbonized the operation compared with the surplus-use-oriented method lessening about 244.7 kg- CO2 on a representative day.

    DOI

  • A study on the evaluation method of low-carbonization effect due to mobility revolution

    加藤博和, 朴秀日, 森田紘圭, 紙屋雄史, 井原雄人, 楊イ翔, 氏原岳人, 松橋啓介

    環境科学会年会講演要旨集(Web)   2022  2022

    J-GLOBAL

  • 電気バス・トラックの導入前性能予測に活用する事を目的とした簡易電費予測理論式の構築

    方亦園, 田沼英紘, 黄施豪, 小林王義, 楊イ翔, 井原雄人, 紙屋雄史

    土木計画学研究・講演集(CD-ROM)   66  2022

    J-GLOBAL

  • 水素循環型社会実現に向けた燃料電池ごみ収集車の設計製作と環境性能評価(第3報)~シャシダイナモ試験による開発車両性能の評価~

    黄エキ, 児玉亮哉, 楊イ翔, 紙屋雄史, 成澤和幸, 井原雄人

    全国都市清掃研究・事例発表会講演論文集   43rd  2021

    J-GLOBAL

  • 「Waste-to-Wheels(ごみでごみ収集車を動かす)」概念の紹介と日本における適用可能性について

    成澤和幸, 田沼明紘, 裴帥, 黄エキ, 楊イ翔, 紙屋雄史, 井原雄人

    全国都市清掃研究・事例発表会講演論文集   42nd  2020

    J-GLOBAL

  • Design Trial Production, and Performance Evaluation of an Electric Busfor Running on Expressways

    Wei Hsiang Yang, Hanlin Liu, Kenta Ishii, Yushi Kamiya, Yasuhiro Daisho, Yuto Ihara, Shuichi Obayashi

    IEEE Conference on Intelligent Transportation Systems, Proceedings, ITSC   2018-November   1143 - 1148  2018.12

     View Summary

    © 2018 IEEE. Our research group designed and made two trial production for two electric buses, a small-sized bus for driving on ordinary roads and a medium-sized bus for driving on expressways. Approximately one-year verification test was conducted in the Metropolitan Expressway Bay Shore route and surrounding areas in Japan. In this paper, analyzed results focused on the regenerative energy while traveling on expressways compared to ordinary roads made by heavy-duty electric vehicles will be summarized.

    DOI

  • 先進電動バス交通システムの開発と性能評価(第11報):高速道路走行を想定した電気バスの設計・試作ならびに実証試験に基づく性能評価

    楊イ翔, 劉函林, 三好宏和, 井原雄人, 紙屋雄史, 大聖泰弘, 尾林秀一

    自動車技術会2018年秋季大会学術講演会講演予稿集     1 - 6  2018.10

    Research paper, summary (national, other academic conference)  

  • Design and evaluation of 'Short-range Frequent-charging-type' and 'Night-charging-type' BE bus

    Wei Hsiang Yang, Isao Tsukui, Eisuke Izutsu, Yushi Kamiya, Yasuhiro Daisho

    2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia, IFEEC - ECCE Asia 2017     1628 - 1633  2017.07

     View Summary

    The two opposite concepts of BE bus (battery-electric bus) which were 'Short-range Frequent-charging-type' and 'Night-charging-type' low-floor buses, were designed and evaluated. Firstly, the current technical level of battery and charging equipment had taken into account to conduct the vehicle design of both BE buses. In additional, the ideal performances of battery and charging equipment for fully substituting the highly used diesel buses in the very densely packed city transportation routes would be clarified in the paper.

    DOI

  • Design and Evaluation of "Short-range Frequent-charging Type" and "Night-charging Type" Battery Electric Bus

    Yang Wei-hsiang, Tsukui Isao, Kamiya Yushi, Daisho Yasuhiro

    Transactions of Society of Automotive Engineers of Japan   48 ( 3 ) 673 - 678  2017.05

     View Summary

    Two opposite concepts of BE bus (battery electric bus), “Short-range Frequent-charging type” and “Night-charging type” low-floor buses were designed and evaluated. First, considering the current technical level of battery and charger, we conducted the optimal design of both types. Then, to fully replace diesel buses which are under high-density timesheet in urban areas, the expected performances of onboard equipment were clarified.

    DOI CiNii

  • プラグインハイブリッド自動車における低炭素効果の走行距離依存性に対する考察

    鈴木智大, 楊イ翔, 紙屋雄史, 大聖泰弘

    自動車技術会2016年度学術研究講演会前刷集   ( 5 ) 1 - 4  2017.03

    Research paper, summary (national, other academic conference)  

  • 短距離走行・高頻度充電コンセプトを採用したワイヤレス給電型電気バスの設計・試作ならびに公道走行実証試験に基づく性能評価

    三輪希己, 呉哲棟, 楊イ翔, 紙屋雄史, 大聖泰弘, 井原雄人, 尾林秀一, 武俊介

    自動車技術会2016年度学術研究講演会前刷集   ( 6 ) 1 - 4  2017.03

    Research paper, summary (national, other academic conference)  

  • Dependence of Low-carbon Effect and Energy Cost Reduction Effect of Plug-in Hybrid Vehicles on Distance Traveled

    Yang Wei-hsiang, Suzuki Tomohiro, Kamiya Yushi, Daisho Yasuhiro

    Transactions of Society of Automotive Engineers of Japan   48 ( 6 ) 1259 - 1264  2017

     View Summary

    Plug-in hybrid vehicles (PHVs) have two driving modes, which are known as charge-depleting (CD) mode and charge-sustaining (CS) mode. The environmental performance of a PHV differs based on the distance between the start and end in the case of a trip in which the PHV switches from CD mode to CS mode. This paper focuses on the low-carbon effect and energy cost reduction effect of PHVs and numerically describes the dependence of these effects on the distance traveled. It also reports new knowledge obtained through a detailed analysis and examination of the equations.

    DOI CiNii

  • ワイヤレス給電型電動バスにおける充電停車時の正着性に対する考察:種々の因子が停車時の正着性に与える影響についての詳細分

    津久井勲, 楊イ翔, 呉哲棟, 紙屋雄史, 高橋俊輔, 大聖泰弘, 尾林秀一

    自動車技術会2016年秋季大会学術講演会講演予稿集     1885 - 1860  2016.10

    Research paper, summary (national, other academic conference)  

  • 電気バスを対象とした”短距離走行・高頻度充電型”と”日中走行・夜間充電型” の比較設計と性能評価

    楊イ翔, 津久井勲, 紙屋雄史, 大聖泰弘

    自動車技術会2016年秋季大会学術講演会講演予稿集     1879 - 1884  2016.10

    Research paper, summary (national, other academic conference)  

  • Performance Evaluation of Short Range Frequent Charging Electric Bus (Third Report)- Reduction of CO2 emissions in the Long-term Field Test and Possibility of Further Reduction of Energy Consumption -

    Eda Kenichiro, Kobayashi Masamichi, Yang Weihsiang, Hirota Toshio, Kamiya Yushi, Daisho Yasuhiro

    Transactions of Society of Automotive Engineers of Japan   47 ( 2 ) 401 - 406  2016.03

     View Summary

    Electric buses have superior environmental performance, emiting no CO2 while driving. However, it is essential to improve battery performance towards more popularization of them. To resolve this issue, a concept “ short range frequent charging ” was formulated. Under this approach, we developed WEBs, Waseda Electric Buses, and performed a long-term operation test in Nagano. Based on results, we evaluated reduction of CO2 emissions and energy costs by introducing them. And we analyzed how vehicle weight reduction and change of overall gear ratio / regeneration torque limit affected running energy. Finally, we considered possibility of further reduction of running energy.

    DOI CiNii

  • 各種電動バスの適合領域明確化(第1報):低床電気バスを対象とした短距離走行・高頻度充電型車両と日中走行・夜間充電型車両の比較設計

    津久井勲, 楊イ翔, 紙屋雄史, 大聖泰弘

    自動車技術会2015年度学術研究講演会前刷集   PS ( 1 ) 1 - 4  2016.03

    Research paper, summary (national, other academic conference)  

  • Li-ion battery deterioration evaluation of short range frequent charging electric bus over long-term operation in cold region

    Wei Hsiang Yang, Zhe Dong Wu, Kenichiro Eda, Yushi Kamiya, Yasuhiro Daisho

    2016 IEEE 2nd Annual Southern Power Electronics Conference, SPEC 2016    2016

     View Summary

    A long-term operation test in cold region of electric buses on public roads was performed in Nagano prefecture as a project of the Japan Ministry of the Environment from 2011 to 2014. For this project, the short-range frequent charging type electric buses, "Waseda Electric Buses (WEBs)" were developed. WEB-3, one of the test vehicles, was driven for 42,114 km over 902 days and charged 4,298 times. In this paper, the following was obtained. (1) The battery performance deterioration is measured and proofed to be predictable. (2) One strategy is advised for expanding battery lifetime. (3) Even started the operation at sub-zero environment, the performance of vehicle was not affected.

    DOI

  • 先進電動マイクロバス交通システムの開発と性能評価(第10報):開発車両の長期営業運行中に得られた低炭素効果の詳細分析と走行エネルギー低減策の検討

    江田健一郎, 小林雅迪, 楊イ翔, 廣田寿男, 紙屋雄史, 大聖泰弘

    自動車技術会2015年秋季大会学術講演会講演予稿集   S066   344 - 349  2015.10

    Research paper, summary (national, other academic conference)  

  • Development and performance evaluation of advanced electric bus transportation system

    Kenichiro Eda, Ryutaro Kanaga, Weihsiang Yang, Toshio Hirota, Yushi Kamiya, Yasuhiro Daisho

    28th International Electric Vehicle Symposium and Exhibition 2015, EVS 2015   7 ( 3 ) 349 - 356  2015.01

     View Summary

    Electric buses have superior environmental performance because they emit no CO2and other exhaust gases while driving. However, in terms of more popularization of electric buses, it is essential to improve battery performance and realize user-friendliness of charging. To resolve these issues, a concept "short range running and frequent charging" was formulated. Under this approach, the authors have studied methods of greatly reducing the amount of large, heavy, and expensive battery. Research on non-contact inductive power supply (IPS) system has also been conducted as a way of improving charging convenience. A long-term operation test of electric buses was performed in Nagano prefecture as part of a project organized by the Japan Ministry of the Environment from 2011 to 2014. For this project the short-range frequent-charging type electric buses, "Waseda Electric Buses (WEBs)" were developed and tested on public roads to make clear the environmental performance and energy costs. WEB-3, one of the test vehicles, was driven for 41,724 km without any major problems and had advantages to reduce 28 - 42 % of CO2emissions and 57 - 64 % of energy costs, compared to conventional diesel buses. And it was estimated on Matlab simulation model that total energy consumption could be reduced by 11 % with vehicle weight reduction, modifications of drivetrain and other components.

    DOI

  • Development and performance evaluation of advanced electric bus transportation system

    Kenichiro Eda, Ryutaro Kanaga, Weihsiang Yang, Toshio Hirota, Yushi Kamiya, Yasuhiro Daisho

    World Electric Vehicle Journal   7 ( 3 ) 349 - 356  2015.01

     View Summary

    © 2015 WEVA. Electric buses have superior environmental performance because they emit no CO2 and other exhaust gases while driving. However, in terms of more popularization of electric buses, it is essential to improve battery performance and realize user-friendliness of charging. To resolve these issues, a concept "short range running and frequent charging" was formulated. Under this approach, the authors have studied methods of greatly reducing the amount of large, heavy, and expensive battery. Research on non-contact inductive power supply (IPS) system has also been conducted as a way of improving charging convenience. A longterm operation test of electric buses was performed in Nagano prefecture as part of a project organized by the Japan Ministry of the Environment from 2011 to 2014. For this project the short-range frequentcharging type electric buses, "Waseda Electric Buses (WEBs)" were developed and tested on public roads to make clear the environmental performance and energy costs. WEB-3, one of the test vehicles, was driven for 41,724 km without any major problems and had advantages to reduce 28 - 42 % of CO2 emissions and 57 -64% of energy costs, compared to conventional diesel buses. And it was estimated on Matlab simulation model that total energy consumption could be reduced by 11 % with vehicle weight reduction, modifications of drivetrain and other components.

    DOI

  • Optimization of engine control methods for range extender-type plug-in hybrid vehicles

    Tatsuya Kaneko, Akihiro Nomura, Wei Hsiang Yang, Yasuhiro Daisho, Yushi Kamiya, Naomi Sawada, Mikio Yasukawa, Fumihiko Takekoshi, Ryo Tsushima

    2013 World Electric Vehicle Symposium and Exhibition, EVS 2014    2014.10

     View Summary

    This paper discusses the effects of different engine control methods on vehicle performance using a compact range extender-type PHV with a series-hybrid system. Vehicle performance was analyzed and compared in detail using two typical engine control methods: the variable control method, which drives the engine in accordance with the vehicle load, and the constant control method, which drives the engine at a constant maximum load efficiency. Specifically, by evaluating the performance in both driving tests by a test vehicle and driving simulations, we identified the characteristics of each engine control method and confirmed which is superior in terms of the seven PHV performance indices determined by the Japanese Ministry of Land Infrastructure and Transport. The comparison results quantitatively verified that the constant control reduced engine loss but caused battery loss to increase. However, since the best control method is determined by the engine and battery loss characteristics of the target vehicle, the constant control method enables superior mileage for the vehicle examined in this research due to its large engine loss reduction effect. In our case, 7.9% improvements of the charge sustaining mode mileage FCS and 7.6% improvements of the combined mileage FPH have been achieved by adopting the constant control method.

    DOI

  • 先進電動マイクロバス交通システムの開発と性能評価(第7報):開発車両の長期営業運行中に得られた低炭素効果とエネルギーコスト削減効果の詳細分析

    加永龍太郎, 田中健人, 楊イ翔, 廣田寿男, 紙屋雄史, 大聖泰弘

    自動車技術会2014年秋季大会学術講演会前刷集     5 - 10  2014.10

    Research paper, summary (national, other academic conference)  

  • 先進電動マイクロバス交通システムの開発と性能評価(第8報):開発車両の長期営業運行中に進行したバッテリ劣化現象の詳細分析

    谷口康一郎, 木村祥太, 楊イ翔, 紙屋雄史, 大聖泰弘

    自動車技術会2014年秋季大会学術講演会前刷集     29 - 34  2014.10

    Research paper, summary (national, other academic conference)  

  • プラグインハイブリッド自動車の動力システムモデリング詳細化に関する研究:インバータと昇圧コンバータの損失モデリング詳細化の検討

    楊イ翔, 紙屋雄史, 大聖泰弘

    自動車技術会2013年度学術研究講演会前刷集   E2 ( 2 ) 1 - 4  2014.03

    Research paper, summary (national, other academic conference)  

  • 各種電動車両に搭載したリチウムイオン蓄電池の 許容劣化度に関する検討

    隅田祐介, 松村広基, 楊イ翔, 紙屋雄史, 大聖泰弘, 森田賢治

    自動車技術会2012年秋季大会学術講演会前刷集     11 - 16  2012.10

    Research paper, summary (national, other academic conference)  

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Syllabus

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Sub-affiliation

  • Faculty of Science and Engineering   Graduate School of Creative Science and Engineering

  • Faculty of Science and Engineering   Graduate School of Environment and Energy Engineering

Internal Special Research Projects

  • 電動車両と電力パワーグリード・交通情報に係るデータ共有プラットフォームの構築

    2022  

     View Summary

    本課題は電動車両走行情報・電力パワーグリード発電情報・交通/天気等の外部情報をもとに,総合的な視点からの研究が可能なプラットフォームの構築を目的とする.はじめの一歩として,我々の研究室が行った車両実証試験にて計測した時間推移データ・走行トリップに対して加速・減速特性を抽出し,データベース化した.それにより路線バスの走行速度パターンの特徴が電動車両への適合性が高いことが確認された.将来そのデータベースにさらに電力パワーグリッド発電情報や交通天気などの外部情報を加えることで,車両電費性能への影響因子明白や充電タイミングの最適化が可能となると考えられる.

  • 各種電動バスの適合領域に関する研究

    2018  

     View Summary

    本研究の目的は主にバッテリ電気バス(Battery Electric Bus,以下BEバス)とプラグインハイブリッドバス(Plug-in Hybrid Bus,以下PHバス)の適合領域を明確化することである.本年度は高速道路走行を想定した電気バスの設計・試作・性能評価を行った.具体的に,① 設計・開発した電気バスの高速道路走行時に生じる回生エネルギーに着目した詳細分析,② 大容量のバッテリを必要とする高速道路走行用電気バスにおける作動温度バラツキ問題に対する詳細考察を行った.

  • 各種電動バスの適合領域明確化

    2015  

     View Summary

    本研究の目的は主にバッテリ電気バス(以下BEバス)とプラグインハイブリッドバス(以下PHバス)の性能に合った適合領域を明確化することである.昨年度はBEバスを対象とし,重量に関する法律や部品性能といった諸制限を満たす最大のバッテリ搭載量と,乗車定員の20%および40%を削減した際の車室内へのバッテリ搭載量を算出した.双方を考慮することで,異なる乗員数における走行可能距離が得られた.さらに,運用方法を加味した設計方針によって「短距離走行・高頻度充電型バス」と「日中走行夜間充電型バス」に分類し,実証試験データを用いたシミュレーションを行うことで,両者の最適化設計を行った.