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Viewing 61 to 90 of 13139
2015-04-14
Technical Paper
2015-01-1174
Nobuhiko Nakagaki
Abstract Toyota Boshoku developed two completely new components for the fuel cell vehicle (FCV), Mirai. These are the fuel cell (FC) Separator, and Stack manifold. The separators are made from stamped metal plates. The anode and cathode separators sandwich the MEA(Membrane Electrode Assembly) between them. It has flow paths for the hydrogen, air and FC coolant. The Anode Separator has hydrogen flow paths on one side, and cooling liquid flow paths on the other side. The pitch used in the flow paths is very fine and it improves both the uniformity of the gas flow and of the surface pressure on the MEA. Therefore, it has contributes to improve the electric power generation performance. The FC Stack manifold is a component that attaches to the end of one side of the FC stack. It is a component that integrates end plate and pipes. The end plate is a portion of the FC stack which holds the fastening load of stack and is made of cast aluminum casting alloy.
2015-04-14
Journal Article
2015-01-1175
Norishige Konno, Seiji Mizuno, Hiroya Nakaji, Yuji Ishikawa
Abstract Toyota Motor Corporation (TMC) has been developing fuel cell (FC) technology since 1992, and finally “MIRAI” was launched in 15th Dec. 2014. An important step was achieved with the release of the “FCHV-adv” in 2008. It established major improvements in efficiency, driving range, durability, and cold start capability. However, enhancing performance and further reductions in size and cost are required to facilitate the commercial widespread adoption of fuel cell vehicles (FCVs). TMC met these challenges by developing the world's first FC stack without a humidifying system. This was achieved by the development of an innovative cell flow field structure and membrane electrode assembly (MEA), enabling a compact and high-performance FC stack. Other cost reduction measures incorporated by the FC stack include reducing the amount of platinum in the catalyst by two-thirds and adopting a carbon nano-coating for the separator surface treatment.
2015-04-14
Journal Article
2015-01-0783
Raphael Gukelberger, Jess Gingrich, Terrence Alger, Steven Almaraz, Bradley Denton
Abstract The ongoing pursuit of improved engine efficiency and emissions are driving gasoline low-pressure loop EGR systems into production around the globe. To minimize inevitable downsides of cooled EGR while maintaining its advantages, the Dedicated EGR (D-EGR®) engine was developed. The core of the D-EGR engine development focused on a unique concept that combines the efficiency improvements associated with recirculated exhaust gas and the efficiency improvements associated with fuel reformation. To outline the differences of the new engine concept with a conventional low-pressure loop (LPL) EGR setup, a turbocharged 2.0 L PFI engine was modified to operate in both modes and also compared to the baseline. The first part of the cooled EGR engine concept comparison investigates efficiency, emissions, combustion stability, and robustness at throttled part load conditions.
2015-04-14
Journal Article
2015-01-1103
Taiki Ando, Tooru Yagasaki, Shuji Ichijo, Kyohei Sakagami, Soichiro Sumida
Abstract Pulley thrust control, changes in the trajectory of the belt as it winds around the pulleys, and the amount of friction transmission were focused on in order to reduce transmission loss and increase the transmission efficiency of CVT. In the case of pulley thrust control, making use of the linear relationship between the rotary speed fluctuation transfer characteristic and the torque transmission capacity between the pulleys and the belt, it was possible to reduce the excess safety factor of the torque transmission volume. Due to pulley tilt, the trajectory of the belt displays deviations with the theoretical geometrical winding radius. The structure of the pulleys was modified in order to reduce this deviation and increase transmission efficiency. Optimization of the additives in the CVT fluid increased the coefficient of friction, decreasing pulley thrust and increasing transmission efficiency.
2015-04-14
Journal Article
2015-01-1272
Jeffrey Jocsak, David White, Cedric Armand, Richard S. Davis
Abstract General Motors has developed an all-new Ecotec 1.5 L range extender engine for use in the 2016 next generation Voltec propulsion system. This engine is part of a new Ecotec family of small displacement gasoline engines introduced in the 2015 model year. Major enhancements over the range extender engine in the current generation Voltec propulsion system include the adoption of direct injection (DI), cooled external exhaust gas recirculation (EGR), and a high 12.5:1 geometric compression ratio (CR). Additional enhancements include the adoption of high-authority phasers on both the intake and exhaust camshafts, and an integrated exhaust manifold (IEM). The combination of DI with cooled EGR has enabled significant thermal efficiency gains over the 1.4 L range extender engine in the current generation Voltec propulsion system at high engine loads.
2015-04-14
Journal Article
2015-01-0452
Junqi Yang, Zhenfei Zhan, Chong Chen, Yajing Shu, Ling Zheng, Ren-Jye Yang, Yan Fu, Saeed Barbat
Abstract Simulation based design optimization has become the common practice in automotive product development. Increasing computer models are developed to simulate various dynamic systems. Before applying these models for product development, model validation needs to be conducted to assess their validity. In model validation, for the purpose of obtaining results successfully, it is vital to select or develop appropriate metrics for specific applications. For dynamic systems, one of the key obstacles of model validation is that most of the responses are functional, such as time history curves. This calls for the development of a metric that can evaluate the differences in terms of phase shift, magnitude and shape, which requires information from both time and frequency domain. And by representing time histories in frequency domain, more intuitive information can be obtained, such as magnitude-frequency and phase-frequency characteristics.
2015-04-14
Journal Article
2015-01-0460
Saket Kansara, Sumeet Parashar, Zhendan Xue
Abstract Decision making in engineering design is complicated, especially when dealing with high-dimensional data. Modern software tools are able to produce a large amount of data while performing optimization studies. A typical optimization problem with many objectives may produce 100s or even 1000s of Pareto Optimal solutions. It is a challenge to analyze this data and make a decision about which design/s to choose for further testing or as a final design. To tackle the problem, two data analysis techniques are used in this paper. Partitive Clustering (PC) is used to locate groups of similar designs in the dataset while Principal Component Analysis (PCA) is used to reduce the dimensionality of the data and visualize it in two and three dimensions. Although these techniques can be used independently, when used together, they prove to be a tremendous help in decision making. This paper underlines the benefit of using these two methods together.
2015-04-14
Journal Article
2015-01-0468
Mingxian Wang, Wei Chen, Yan Fu, Yong Yang
Abstract As the world's largest auto producer and consumer, China is both the most promising and complex market given the country's rapid economic growth, huge population, and many regional and segment preference differences. This research is aimed at developing data-driven demand models for customer preference analysis and prediction under a competitive market environment. Regional analysis is first used to understand the impact of geographical factors on customer preference. After a comprehensive data exploration, a customer-level mixed logit model is built to shed light on fast-growing vehicle segments in the Chinese auto market. By combining the data of vehicle purchase, consideration, and past choice, cross-shopping behaviors and brand influence are explicitly modeled in addition to the impact of customer demographics, usage behaviors, and attributes of vehicles.
2015-04-14
Journal Article
2015-01-0470
Joanna Rakowska, Amir Chator, Bruno Barthelemy, Michael Lee, Shawn Morgans, Jeffrey Laya, Gregory Zinn, Ching-Hung Chuang, Sreekanth Reddy Gondipalle
Abstract Designing a vehicle body involves meeting numerous performance requirements related to different attributes such as NVH, Durability, Safety, and others. Multi-Disciplinary Optimization (MDO) is an efficient way to develop a design that optimizes vehicle performance while minimizing the weight. Since a body design evolves in course of the product development cycle, it is essential to repeat the MDO process several times as a design matures and more accurate data become available. This paper presents a real life application of the MDO process to reduce weight while optimizing performance over the design cycle of the 2015 Mustang. The paper discusses the timing and results of the applied Multi-Disciplinary Optimization process. The attributes considered during optimization include Safety, Durability and Body NVH.
2015-04-14
Journal Article
2015-01-0500
Emilio Larrodé, Alberto Torne, Alberto Fraile
Abstract The analysis and decision making on design, behavior and use of a prototype electric vehicle is the main focus has been pursued in this paper. It was modeled a prototype electric vehicle, called Gorila EV, as from the software tool Adams/Car. The dimensional parameters needed to create the model were obtained by measurements, calculations and approximations. Subsequently, it was determined a route to be travelled by the vehicle and proceeded to simulation of the vehicle on that route. Different modifications in the model were performed to compare their results with the original model through simulation in Adams/Car. These changes ranged from a simple change in the mass of the chassis until a change in the type of vehicle traction. After made the changes and simulations, it carried out the analysis of the most remarkable results. These results were studied subsystem by subsystem, beginning with the wheels, to suspensions and engine until vehicle chassis.
2015-04-14
Journal Article
2015-01-0168
Steffen Lampke, Simon Schliecker, Dirk Ziegenbein, Arne Hamann
Abstract The underlying theories of both control engineering and real-time systems engineering assume idealized system abstractions that mutually neglect central aspects of the other discipline. Control engineering theory, on the one hand, usually assumes jitter free sampling and constant input-output latencies disregarding complex real-world timing effects. Real-time engineering theory, on the other hand, uses abstract performance models that neglect the functional behavior, and derives worst-case situations that have little expressiveness for control functionalities in physically dominated automotive systems. As a consequence, there is a lot of potential for a systematic co-engineering between both disciplines, increasing design efficiency and confidence. We have taken a standard control-engineering tool, Simulink, and combined it with state-of-the-art real-time system design and analysis tools, SymTA/S and TraceAnalyzer from Symtavision.
2015-04-14
Technical Paper
2015-01-0148
Georg Macher, Harald Sporer, Eric Armengaud, Christian Kreiner
Abstract Increasing demands for safety, security, and certifiability of embedded automotive systems require additional development effort to generate the required evidences that the developed system can be trusted for the application and environment it is intended for. Safety standards such as ISO 26262 for road vehicles have been established to provide guidance during the development of safety-critical systems. The challenge in this context is to provide evidence of consistency, correctness, and completeness of system specifications over different work-products. One of these required work-products is the hardware-software interface (HSI) definition. This work-product is especially important since it defines the interfaces between different technologies. Model-based development (MBD) is a promising approach to support the description of the system under development in a more structured way, thus improving resulting consistency.
2015-04-14
Journal Article
2015-01-1208
Sinisa Jurkovic, Khwaja Rahman, Nitin Patel, Peter Savagian
This paper presents the design and performance details of electric propulsion system for GM's second generation Extended Range Electric Vehicle (EREV). First generation Chevrolet Volts have been driven over half a billion miles in North America from October 2013 through September 2014, 74% of which were all-electric. The second generation of Volt brings a significant mass reduction and increased performance, EV driving range and fuel economy while simultaneously reducing rare earth content in its traction electric motors. The electric propulsion system is built on two electric machines; both PMAC topology. While hybrid-electric vehicles are gaining in popularity in hopes of addressing cleaner, energy sustainable technology in transportation, materials sustainability and rare earth dependence mitigation has not been the first priority in the hybrids available on the market today.
2015-04-14
Technical Paper
2015-01-0723
Sebastian Bender, Raymond Khoo, Christoph Große, Felix M. Wunner, Heong Wah Ng, Markus Lienkamp
Abstract Upcoming stringent regulations on emissions and fuel efficiency are driving the automotive industry towards lightweight vehicle design. Thus, a higher share of carbon fiber composite materials in vehicle structures is expected. Current literature addresses development processes of composite components under a limited scope, however the considerations of design parameters used in these studies are inadequate for the realistic development of a full vehicle structure, especially in a resource-constrained development project. In addition, existing vehicle structure design philosophies applied for metal structures cannot be directly ported over for composite design due to differences in material properties, failure modes and design for manufacturing limitations.
2015-04-13
WIP Standard
AS5726B
This standard only defines interconnect, electrical and logical (functional) requirements for the interface between a Micro Munition and the Host. The physical and mechanical interface between the Micro Munition and Host is undefined. Individual programs will define the relevant requirements for physical and mechanical interfaces in the Interface Control Document (ICD) or system specifications. It is acknowledged that this does not guarantee full interoperability of Interface for Micro Munitions (IMM) interfaces until further standardization is achieved.
2015-04-09
Article
Honda’s next-generation Civic will debut a sporty new design language, more efficient and spirited powertrains—and serve as the lead application for Honda’s new Global Compact platform that will also underpin the next-generation Accord as well as the HR-V crossover.
2015-04-09
Standard
J1538_201504
The terms included in the Glossary are general in nature and may not apply to all manufacturers' systems. All terms in Section 3 apply to automotive inflatable restraint systems in general which are initiated by an electric or mechanical stimulus upon receipt of a signal from a sensor. These terms are intended to reflect existing designs and the Glossary will be updated as information on other types of systems becomes available. Appendix A is included to identify terminology that is no longer in common use or specifically applicable to inflatable restraint systems, but was published in the December 2001 version of SAE J1538.
2015-04-07
Magazine
GM's CTO driving new paths to technology leadership 'We're making actual production commitments regarding our advanced-technology strategy, rather than just talking about it,' says GM's CTO Jon Lauckner. 'We're absolutely going to be among the leaders, if not the leader, in these areas.' Aluminum prepares for its next big leap Ford's F-Series blockbuster was just the beginning. New micromills now in pilot phase aim to bring vastly stronger and more formable light-alloy materials at higher capacity, says Alcoa's Mike Murphy. Slick solutions for friction reduction From new lubricants to 'smart' oil pumps and clever bearing technologies, engine designers are attacking every potential source of spin losses and internal friction in the quest for more mechanical work out of less fuel. Next-gen NSX: a twin-turbo, multi-material Ferrari-fighter The production NSX made its much-awaited global debut at NAIAS in January.
2015-04-06
WIP Standard
AS6081A
This SAE Aerospace Standard standardizes practices to: a. identify reliable sources to procure parts, b. assess and mitigate risk of distributing fraudulent/counterfeit parts, c. control suspect or confirmed fraudulent/counterfeit parts, d. and report suspect and confirmed fraudulent/counterfeit parts to other potential users and Authority Having Jurisdiction.
2015-04-01
Book
Honda's April 2015 R&D Technical Review features cutting-edge developments and new ways of solving engineering problems from Honda's worldwide R&D teams. This edition brings 17 technical papers covering: • New motorcycle design and styling • Styling design of new crossover VEZEL • Development of inverter generator w/ fuel injector engine • Development of UNI-CUB • Synthesis of facet-controlled PtNi nanoparticles and evaluation of performance in PEM fuel cell • Prediction method for vibration transmission of hydraulic engine mount • Study of human dynamic analysis relating to handling and stability fo driving
2015-04-01
Magazine
Deep thinking about deep space NASA is mining the rich fields of knowledge and creativity in the minds of university students to improve living and working conditions in space. Rise of the underdogs Problem-plagued effort last year spurs Baja SAE team from VIT University of India to overhaul itself and its car. Materials, data-aq packages among choices touted in Collegiate Cup contest Central Michigan's Baja team, which did some impressive materials analyses, takes home the SAE Mid-Michigan Section's trophy as part of that professional group's Engineers Week activities. Toyota looks for more from college students than high GPA "Those that participate in an SAE related-activity display passion for the automotive industry, and these candidates are ideal for our organization."
2015-03-30
Technical Paper
2015-01-0094
Supakit Rooppakhun, Pornporm Boonporm, Worawat Puangcha-um
Abstract In this study, the method of analyzing the thin-wall crashing box of impact attenuator for student formula is proposed by the means of simulation and validation following Formula Society of Automotive Engineers-SAE rules. The analysis was performed based on computerized simulation software for calculated the absorption capacity of the simple and multiple cell of thin-walled tubes. The effect of thin-wall thickness consisted of 1.2 mm, 1.6 mm and 2.0 mm was also evaluated. The simulation results as energy absorption, crashing force efficiency, and absorbed energy per unit mass were identified among nine patterns. According to the results, the increase of interior cell number and the wall thickness contribute the absorbed energy ability. However, the increment of wall thickness lead to the increase of crashing force magnitude. Regarding the kinetic energy, a 2×2 multiple cell box with the thickness of 2 mm is designated for construction and verify.
2015-03-27
Standard
J2129_201503
This SAE Information Report lists the method which outside sources will follow when submitting documents for origination or review by the SAE CONAG Council.
2015-03-27
Standard
J1254_201503
This SAE Standard includes names of major components and parts peculiar to this type of machine. Illustrations used here are not intended to include all existing commercial machines or be exactly descriptive of any particular machine. They have been provided to describe the principles to be used in applying this document.
2015-03-25
Magazine
Bringing it all together Ian Adcock catches up with GKN's newly appointed president, Group Technology, Rob Rickell. Graphene Supreme Ian Adcock discovers what role graphene is likely to play in the vehicles of tomorrow. What lies beneath? Automotive Design looks into chassis developments that are designed to ensure local preferences are catered for globally.
2015-03-25
Book
North America was the world’s second largest automotive market by sales in 2014 with just over 19.4 million units sold, versus 23 million in China and 18.2 million units in Europe. The North American market and, in particular, the US one which accounts for about 80% of the regional sales, approaches the 19-million unit mark under different underlying fundamentals. Significant chunks of excess capacity have been cut at several automotive plants in North America, leading to the end of unhealthy over-discounting in order to secure line saturation and reduce imbalances in inventories.
2015-03-24
WIP Standard
J3092
The purpose of this document is to provide information and guidelines for use by automotive designers, test engineers and policymakers with…
2015-03-12
Standard
AS9016A
The aviation, space, and defense industries rely on the development and manufacture of complex products comprised of multiple systems, subsystems, and components each designed by individual designers (design activities) at various levels within the supply chain. Each design activity controls various aspects of the configuration and specifications related to the product. When a change to design information is requested or required, the change has to be evaluated against the impacts to the higher-level system. Proposed changes to design information that the design activity identifies to be minor and have no effect on their product requirements or specifications have the potential to be concurrently implemented and approved, where authorized to do so. Changes that affect customer mandated requirements or specifications must be approved prior to implementation.
2015-03-11
Article
Collaborative projects between OEMs can be surprising, as evidenced by the Daimler and Renault-Nissan link and its latest A-segment products — said to be the first of more joint developments.
2015-03-10
Technical Paper
2015-01-0073
Hayden Charles Smith, Sam Paterson, Clara Mazzone, Sammy Diasinos, Graham Doig
Abstract The Sunswift Solar Car project has been running at UNSW Australia in Sydney for 20 years as of 2015. It is an entirely student-run endeavour which revolves around the design and development of a solar/electric vehicle nominally designed to compete in the World Solar Challenge rally from Darwin to Adelaide every 2 years. The student cohort is drawn from a range of schools, disciplines and backgrounds, and the team has been increasingly successful and high-profile particularly in its second decade. The excellent level of hands-on training that the project provides to students is not rewarded with academic credit yet many of the alumni credit the project with launching their careers and ambitions. The team's world record-breaking latest vehicle, eVe, is the fifth constructed and presents a radical departure from previous cars in that it carries a passenger in a conventional layout and is based around a road-going sports car.
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