https://ojs.sciltp.com/journals/ijamm/issue/feed 2025-03-31T17:27:52+08:00 Mr. Toliver Guo ijamm@sciltp.com Open Journal Systems <p>The International Journal of Automotive Manufacturing and Materials is the leading journal in its respective field, peer reviewed, and published in Australia. The journal presents new findings and developments in the automotive field as well as related disciplines. Its scope covers the principles, methodologies, theoretical studies, experimental studies, numerical studies, product designs, manufacturing engineering and material engineering topics related to this field.</p> https://ojs.sciltp.com/journals/ijamm/article/view/712 2025-01-20T16:47:22+08:00 Xinke Miao miaoxinke@tongji.edu.cn Bingxin Xu xu1286805546@163.com Jun Deng eagledeng@tongji.edu.cn Liguang Li liguang@tongji.edu.cn

<p class="categorytitle"><em>Review</em></p> <h1>Key Technologies to 50% Brake Thermal Efficiency for Gasoline Engine of Passenger Car</h1> <div class="abstract_title"> <p><strong>Xinke Miao, Bingxin Xu, Jun Deng, and Liguang Li *</strong></p> </div> <div class="abstract_top"> <p>School of Automotive Studies, Tongji University, Shanghai 201804, China</p> <p>* Correspondence: liguang@tongji.edu.cn</p> </div> <div class="abstract_top"> <p>Received: 13 August 2024; Revised: 6 December 2024; Accepted: 17 December 2024; Published: 20 January 2025</p> </div> <p><strong class="label">Abstract: </strong>As fuel consumption and emissions regulations become increasingly stringent, various advanced strategies have been proposed to achieve higher efficiency in internal combustion engines. This paper reviews the advancements in thermal efficiency of gasoline engines and analyzes the key technological methods to achieve over 50% brake thermal efficiency (BTE). The technological routes proposed for high-efficiency gasoline engine are primarily focused on high compression ratios and lean combustion combined with novel combustion technologies. Supporting technologies mainly include Atkinson/Miller cycles, intake boosting, exhaust gas re-circulation (EGR), water injection, thermal barrier coatings, friction reduction, structural optimization, and combustion diagnostics and control.</p>

2025-01-20T00:00:00+08:00 Copyright (c) 2025 by the authors. https://ojs.sciltp.com/journals/ijamm/article/view/766 2025-02-14T15:14:41+08:00 Dongsheng Zhang 2241614@tongji.edu.cn Minglong Li li_donnie@perkins.com Liguang Li liguang@tongji.edu.cn Jun Deng eagledeng@tongji.edu.cn Ye Li ye.li@perkins.com Rongfang Zhou zhou_grace@cat.com Long Ma 2241592@tongji.edu.cn

<p class="categorytitle"><em>Article</em></p> <h1>Failure Analysis and Reliability Optimization Approaches for Particulate Filter of Diesel Engine after-Treatment System</h1> <div class="abstract_title"> <p><strong>Dongsheng Zhang ^1,2, Minglong Li ², Liguang Li ^1,*, Jun Deng ¹, Ye Li ³, Rongfang Zhou ³, and Long Ma ¹</strong></p> </div> <div class="abstract_top"> <p>¹ School of Automotive Studies, Tongji University, Shanghai 201804, China</p> <p>² Perkins Small Engines (Wuxi) Co., Ltd., Wuxi 214001, China</p> <p>³ Perkins Power Systems Technology (Wuxi) Co., Ltd., Wuxi 214001, China</p> <p>* Correspondence: liguang@tongji.edu.cn</p> </div> <div class="abstract_top"> <p>Received: 20 September 2024; Revised: 10 December 2024; Accepted: 14 January 2025; Published: 14 February 2025</p> </div> <p><strong class="label">Abstract: </strong>Diesel particulate filter (DPF) clogging and high temperature failures are predominant issues affecting the reliability of diesel engines in the market applications. These failures, which include substrate crack and melting, can lead to a significant increment of tailpipe particulate matter (PM) emissions, even exceeding the acceptable limits. Such DPF events not only diminish the vehicle productivity but also escalate the maintenance costs. The DPF, situated downstream in the diesel engine exhaust system, is directly influenced by the health state of the upstream engine and diesel oxidation catalyst (DOC). Addressing the risks of DPF system failures is a complex systems engineering challenge. This paper employs a fault tree analysis (FTA) to identify the root causes of these failures, considering the DPF after-treatment functions, all elements affecting system performance, and key interconnections among these elements. Then the DPF reliability optimization strategies are discussed from a system optimization perspective, focusing on reducing the engine-out PM, ensuring the appropriate substrate volume and precious metal coating content for DPF clogging, improving the virtual DPF soot loading sensor accuracy, lowering the extremely uneven flow or DPF soot loading and adopting the conservative regeneration control for high temperature failures. These measures are crucial to mitigate the failure risks and ensure the reliable DPF operation. To achieve the tighter PN requirement of future regulation, additional DPF optimizations would be required. Adopting the new Cordierite material with a higher porosity, further smaller mean pore size and uniform pore size distribution are one of current developing tendencies from existing studies. The Cordierite material with membrane design would be a new developing direction for further improving of filtration efficiency and better hysteresis of DPF pressure drop, plus lower porosity and thicker wall design would get better robustness and DPF pressure drop.</p>

2025-02-14T00:00:00+08:00 Copyright (c) 2025 by the authors. https://ojs.sciltp.com/journals/ijamm/article/view/805 2025-02-28T12:01:01+08:00 Changfei Xu xcv207612456@qq.com Ruisheng Liu 916331989@qq.com Feibo Wang feibo_w@outlook.com Jinying Wu 812003615@qq.com Rui Wang 3231415909@qq.com Zhuo Zhang zhangzhuoqust@163.com

<p class="categorytitle"><em>Review</em></p> <h1>Hydrogen-Doped Natural Gas and its Transportation Technology</h1> <div class="abstract_title"> <p><strong>Changfei Xu ¹, Ruisheng Liu ², Feibo Wang ¹, Jinying Wu ¹, Rui Wang ¹, and Zhuo Zhang ^1,*</strong></p> </div> <div class="abstract_top"> <p>¹College of Mechanical and Vehicle Engineering, Linyi University, Linyi 276000, China</p> <p>²Linyi Power Supply Company of State Grid, Linyi 276005, China</p> <p>* Correspondence: zhangzhuoqust@163.com</p> </div> <div class="abstract_top"> <p>Received: 21 August 2024; Revised: 23 December 2024; Accepted: 24 January 2025; Published: 28 February 2025</p> </div> <p><strong class="label">Abstract: </strong>With<strong> </strong>the continuous increase in energy consumption and the exacerbation of environmental problems, the energy transition is becoming increasingly urgent. Hydrogen, as a clean and zero-carbon energy source, has received extensive attention. Hydrogen-doped natural gas transportation technology has emerged as a promising solution to the challenge of large-scale hydrogen transportation. This article comprehensively reviews the development history of hydrogen doping technology in both China and around the world, and systematically analyzes the effects of hydrogen-doped natural gas on pipeline tubing, including the phenomena of hydrogen embrittlement, hydrogen permeation, leakage diffusion, and ignition explosion. The advantages of this technology, such as significant carbon emission reduction and enhanced energy utilization efficiency, are thoroughly examined. The challenges it faces, such as the elevated safety risks due to the flammability and explosiveness of hydrogen, the immaturity of production technologies, and the inadequacies in regulations and standards, are also meticulously pointed out. Looking ahead, in-depth technical research and development, the innovation of hydrogen production technologies, and the establishment of robust regulations and standards are crucial to facilitating the hydrogen-doped natural gas transportation technology to play a more prominent role in the energy field and to promoting the sustainable development of energy. Additionally, with the continuous innovation and breakthroughs in technology, it is expected that the hydrogen blending ratio can be further increased. For example, the hydrogen blending ratio in some regions may be raised to approximately 30% by 2030, thereby further reducing carbon emissions and accelerating the transformation of the energy structure towards clean and low-carbon.</p>

2025-02-28T00:00:00+08:00 Copyright (c) 2025 by the authors. https://ojs.sciltp.com/journals/ijamm/article/view/955 2025-03-19T11:54:44+08:00 Jinying Wu 812003615@qq.com Rui Wang 3231415909@qq.com Ruisheng Liu 916331989@qq.com Zhuo Zhang zhangzhuoqust@163.com

<p class="categorytitle"><em>Review</em></p> <h1>The Development Status of Composite Materials and Winding Process of Type IV Hydrogen Storage Cylinder</h1> <div class="abstract_title"> <p><strong>Jinying Wu ¹, Rui Wang ¹, Ruisheng Liu ², and Zhuo Zhang ^1,*</strong></p> </div> <div class="abstract_top"> <p>¹College of Mechanical and Vehicle Engineering, Linyi University, Linyi 276000, China</p> <p>²Linyi Power Supply Company of State Grid, Linyi 276005, China</p> <p>* Correspondence: zhangzhuoqust@163.com</p> </div> <div class="abstract_top"> <p>Received: 27 September 2024; Revised: 2 March 2025; Accepted: 6 March 2025; Published: 19 March 2025</p> </div> <p><strong class="label">Abstract: </strong>In the context of the energy crisis, hydrogen energy has become a key research object in various countries due to its advantages. This article introduces the selection and molding process of Type IV hydrogen storage bottle liner materials, intermediate and surface fiber materials, winding methods and process selection, and constructs the components of the entire production process, describing the current development status of hydrogen storage bottles. By elaborating on the preparation process and materials used for Type IV hydrogen storage bottles, it is pointed out that current materials and safety have significant limitations on the development of hydrogen storage bottles, and the direction of lightweight and low-cost development is clarified. We hope that this article can help China’s Type IV hydrogen storage bottles achieve complete independence as soon as possible.</p>

2025-03-19T00:00:00+08:00 Copyright (c) 2025 by the authors. https://ojs.sciltp.com/journals/ijamm/article/view/959 2025-03-20T17:22:49+08:00 Xi Chen chenxi@nast.com.cn Wei Zheng chenxi@nast.com.cn Kan Wang chenxi@nast.com.cn Kaiji Gong chenxi@nast.com.cn Jun Yang chenxi@nast.com.cn

<p class="categorytitle"><em>Article</em></p> <h1>Evaluation of Measurement Uncertainty of Net Power of Automobile Engine</h1> <div class="abstract_title"> <p><strong>Xi Chen *, Wei Zheng, Kan Wang, Kaiji Gong, and Jun Yang</strong></p> </div> <div class="abstract_top"> <p>Power System Laboratory, Xiangyang Daan Automobile Test Center Limited Corporation, High-Tech Zone, Xiangyang 441004, China</p> <p>* Correspondence: chenxi@nast.com.cn; Tel.: +86-13607275969</p> </div> <div class="abstract_top"> <p>Received: 30 September 2024; Revised: 13 February 2025; Accepted: 18 March 2025; Published: 20 March 2025</p> </div> <p><strong class="label">Abstract: </strong>The net power of an automobile engine is one of the important indicators for measuring engine performance, which reflects the power output capacity of the engine under actual working conditions. In this paper, a natural gas engine is selected. Based on the test procedure and measurement method, a mathematical model of net power is established. The standard uncertainties of parameters such as measurement repeatability, measured engine torque, measured engine speed, atmospheric pressure, intake humidity, and intake temperature in the model are analyzed. Finally, the evaluation result of measurement uncertainty of net power is obtained.</p>

2025-03-20T00:00:00+08:00 Copyright (c) 2025 by the authors. https://ojs.sciltp.com/journals/ijamm/article/view/971 2025-03-24T14:27:49+08:00 Heli Liu h.liu19@imperial.ac.uk Benjamin Zhang ben.zhang21@imperial.ac.uk Vincent Wu qiunan.wu22@imperial.ac.uk Xiao Yang x.yang17@imperial.ac.uk Liliang Wang liliang.wang@imperial.ac.uk

<p class="categorytitle"><em>Review</em></p> <h1>Review of Digital Twin in the Automotive Industry on Products, Processes and Systems</h1> <div class="abstract_title"> <p><strong>Heli Liu ^1,2, Benjamin Zhang ¹, Vincent Wu ^1,2, Xiao Yang ^1,2, and Liliang Wang ^1,2,*</strong></p> </div> <div class="abstract_top"> <p>¹Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK</p> <p>²Smart Forming Research Base, Imperial College London, London SW7 2AZ, UK</p> <p><strong>* </strong>Correspondence: liliang.wang@imperial.ac.uk</p> </div> <div class="abstract_top"> <p>Received: 17 February 2025; Revised: 10 March 2025; Accepted: 20 March 2025; Published: 24 March 2025</p> </div> <p><strong class="label">Abstract: </strong>In the era of digital manufacturing, digital technologies are rapidly revolutionising the automotive industry. Among these, the digital twin, an enabling industry 4.0 digital technology first introduced two decades ago, is characterised by the seamless integration of physical and cyber realms. The digital twin is undergoing extensive investigations within the automotive sector, covering various perspectives including design, manufacturing, and application. By leveraging the big manufacturing data captured by spatially distributed sensing networks, the digital twin shows the capacity to create high-fidelity models of actual manufacturing practices, thereby significantly improving the precision and efficiency of production processes. Integrated with other digital technologies such as big data analytics (BDA) and the Internet of Things (IoT), the digital twin mirrors components in the physical world into the virtual environment and facilitates the exchange of real-time information to achieve fully converged cyber-physical spaces. This in turn minimises costs and improves the overall product quality, flexibility of manufacturing processes, and system integration. This work reviewed recent advancements in digital twin applications in the automotive industry focusing on automotive products, manufacturing processes, and manufacturing systems. Insights were provided into the future of digitally enhanced technologies in automotive manufacturing towards digital manufacturing and developing digital product passports (DPPs) for circular economy (CE).</p>

2025-03-24T00:00:00+08:00 Copyright (c) 2025 by the authors.