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Viewing 31 to 60 of 13070
2015-04-14
Technical Paper
2015-01-1255
Michael Pontoppidan, Jose G. C. baeta
The approach of combining highly boosted Ethanol Direct Injected (EDI) engines with extreme downsizing represents a powerful means to reduce CO2 emission at reduced production costs, making it possible to replace high-displacement E0 or E22 engines with smaller highly boosted engines running with bio-fuels such as hydrated ethanol in Brazil (E100) or in North America and Europe (E85). The DI approach is an ideal system for an ethanol engine as the fuel properties enable high compression ratios (CR) in the range of 12 to 13:1, eliminating knock occurrence and generating precise fuel metering. Applied initially to a single turbocharged downsized, down-speeded engine can be obtained a significant decrease in engine friction and a reduction in the exhaust emissions as well a recovery of the power output. This leads to a significant improvement in brake thermal efficiency.
2015-04-14
Technical Paper
2015-01-0723
Sebastian Bender, Raymond Khoo, Christoph Große, Felix M. Wunner, Heong Wah Ng, Markus Lienkamp
Upcoming stringent regulations on emissions and fuel efficiency are driving the automotive industry towards light-weight vehicle design. 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 but 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 used for metallic structures cannot be directly ported over for composites design due to the differences in material properties, failure modes and design for manufacturing limitations.
2015-04-14
Technical Paper
2015-01-0477
Sun Qi, Zhang Wen, Wan Liangyu, Wang Xiaochuan
The vehicle dimension parameters of the domestic passenger car in current Chinese market was analyzed. Combined with the human body golden ratio, a probability and statistics method was used to propose an intrinsic link between vehicle dimension and platform dimension, an intrinsic link between the dimensions of a vehicle. The proportion of coordination in different styles of models was analyzed also. Provides a reference method for the subsequent development of models to define the dimension of the vehicle.
2015-04-14
Technical Paper
2015-01-0459
Vesna Savic, Louis Hector, Hesham Ezzat, Anil Sachdev, James Quinn, Ronald Krupitzer, Xin Sun
This paper presents an overview of a four-year project on integrated computational materials engineering (ICME) for third generation advanced high-strength steels (3GAHSS) development. Following a brief look at ICME as an emerging discipline within the Materials Genome Initiative, technical tasks in the ICME project will be discussed. Specific focus of the individual tasks is on multi-scale, microstructure-based material model development using state-of-the-art computational and experimental techniques, forming, assembly, design optimization, integration and technical cost modeling. The integrated approach is illustrated using a 980 grade transformation induced plasticity (TRIP) steel with a two-step quenching and partitioning (Q&P) heat treatment as an example.
2015-04-14
Technical Paper
2015-01-0168
Steffen Lampke, Simon Schliecker, Dirk Ziegenbein, Arne Hamann
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 insignificant (constant) input-output latencies disregarding complex real-world timing effects. Real-time engineering theory, on the other hand, uses abstract performance and resource models that neglect the functional behavior, and derives worst-case situations that have little expressiveness for control functionalities in 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
2015-01-0178
James Price
AUTOSAR 4.0.3 is now being deployed by many of the world’s top automotive OEMs and seeing increased adoption in regions outside of Europe. OEMs exert significant effort in the design, migration, configuration, integration, generation, and in the final build of AUTOSAR-based systems. The presentation gives an overview how to successfully adopt an AUTOSAR design methodology and how to manage the digital interaction  between Tier 1 suppliers and OEMs
2015-04-14
Technical Paper
2015-01-0247
Sonakshi Sharma, Vipul Kumar, Shubhranshu Garg, Sudhir Kashinath Gupte
There are variety of motors and generators/alternators being manufactured internationally, for variety of applications. It is a difficult task for the user to identify and select the type of motor /generator/alternator for a specific use, by the designer and ultimately the user is totally unaware of what is bought and why. There is a need to designate the motors and generators so that by interpretation of the identification nomenclature of the motor or generator it can be judged that what type it is, whether a series motor, an induction motor etc, in case of motors. This will eventually make it easy for the manufacturer, the buyer and the consumer to identify the motor or generator type. So a universally accepted and followed identification nomenclature is required to be developed which will henceforth make dealing in motors and generators simpler. It will prove to be useful during troubleshooting.
2015-04-14
Technical Paper
2015-01-0411
Richard K. Stobart
In a series of panel discussions conducted at the World Congress over the last two years, a range of issues have been discussed concerning the future of the profession. The consensus amongst panellists, participants and the reports they bring from industry suggest a substantial shortage of professional engineers. Attempts to improve the image of engineering in primary and secondary education have been successful, but reach too few students. AWIM provides one example of a project on a big scale that has been embraced by schools and which is characterised by an excellent co-operation between teachers and mentors. In spite of the success of such initiatives, the poor diversity in engineering that starts with undergraduate courses stands out as one of the biggest issues for the profession. There appear to be simply too many initiatives throughout the engineering experience.
2015-04-14
Technical Paper
2015-01-0259
Tyler Zellmer, Julio Rodriguez, John R. Wagner, Kim Alexander, Philip Pidgeon
Abstract According to the National Highway Traffic Safety Administration (NHTSA), motor collisions account for nearly 2.4 million injuries and 37 thousand fatalities each year in the United States. A great deal of research has been done in the area of vehicular safety, but very little has been completed to ensure licensed drivers are properly trained. Given the inherent risks in driving itself, the test for licensure should be uniform and consistent. To address this issue, an inexpensive, portable data acquisition and analysis system has been developed for the evaluation of driver performance. A study was performed to evaluate the system, and each participant was given a normalized driver rating. The average driver rating was µ=55.6, with a standard deviation of σ=12.3. All but 3 drivers fell into the so-called "Target Zone", defined by a Driver Rating of µ± 1σ.
2015-04-14
Technical Paper
2015-01-0427
Zhigang Wei, Limin Luo, Shengbin Lin
In order to reduce time-to-market, fatigue design and validation of modern products are often based on accelerated testing results. This is especially true for the durability and reliability performance assessment of vehicle components and systems, based on the fact that the designed service lives with 10 years or greater for vehicle products are not very uncommon. However, fatigue test data often show intrinsic variations or noises due to the uncertainties involved in materials, testing and environment. Therefore, statistical data analysis, such as curve fitting and subsequent design curve construction, is a critical process for the accurate data interpretation and eventual product design and validation. Additionally, sample allocation and sample size can affect both the accuracy and the testing cost, therefore, testing should be properly planned and executed.
2015-04-14
Technical Paper
2015-01-0972
Alexander Pawlowski, Derek Splitter
It is well known that spark ignited engine performance and efficiency is closely coupled to fuel octane number. The present work combines historical and recent trends in spark ignition engines to build a database of engine design, performance, and fuel octane requirements over the past 70 years. The database consists of engine compression ratio, required fuel octane number, peak mean effective pressure, specific output, and combined fuel economy for passenger vehicles and light trucks. Recent trends in engine performance, efficiency, and fuel octane number requirement were used to develop correlations of fuel octane number utilization, performance, specific output, and theoretical Otto cycle engine efficiency. The results show that historically, engine compression ratio, performance, and efficiency have been strongly coupled to fuel octane number.
2015-04-14
Technical Paper
2015-01-0325
Alberto Boretti
The paper discusses the benefits of a four stroke engine having one intake and one exhaust rotary valve. The rotary valve has a speed of rotation half the crankshaft and defines an open passage that may permit up to extremely sharp opening or closing and very large gas exchange areas. This design also permits central direct injection and ignition by spark or jets. The dual rotary valve design is applied to a naturally aspirated V-four engine of 1000cc displacement, gasoline, methane or hydrogen fuelled with central direct injection and spark ignition. The engine is modeled by using a 1D engine & gas dynamics simulation software package to assess the potentials of the solution. The novelty in the proposed dual rotary valve system is the combustion chamber of good shape and high compression ratio with central direct injector and spark plug or jet ignition, coupled to the large gas exchange areas of the rotary system.
2015-04-14
Technical Paper
2015-01-1208
Sinisa Jurkovic, Khwaja Rahman, Nitin Patel, Peter Savagian
The Chevrolet Volt is an electric vehicle with extended-range that is capable of operation on battery power alone, and on engine power after depletion of the battery charge. Since its introduction in 2011, Chevrolet Volts have been driven over half a billion miles: 63% as electric vehicles and 37% in extended range driving. For 2016, GM has developed the secon-generation of the Volt vehicle and “Voltec” propulsion system. The second-generation of Volt electric propulsion system is built on two electric machines; both interior permanent magnet type. 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
2015-01-0465
Seyed M. Mirmiran, Vern Scott, Matthew Herc, Shin Taguchi
The need for a proficient, cost-efficient asset management system has already been established . To meet that need, we first reviewed plausible solutions to asset location and verification capability based on existing technology. In lieu of unavailability of a robust solution, we conducted a two-pronged DFSS project to fulfill both the hardware and software components’ requirements of such a system. The comprehensive DFSS studies covered the full range of concept identification based on gathered voice of customer data; selection of most suitable solution via Taguchi House of Quality; designing an optimization plan; and verification of the optimized results through test runs. This paper reports the outcome of those DFSS studies, as a unique approach in taking an idea through concept generation and development, finally leading to the design of a robust product.
2015-04-14
Technical Paper
2015-01-1526
Yasuyuki Onishi, Thomas Ramsay, Timothy Juan, James McKillen
A sports car exhibits many challenges from an aerodynamic point of view: drag that limits top speed, lift - or down force - and balance that affects handling, brake cooling and insuring that the heat exchangers have enough air flowing through them under several vehicle speeds and ambient conditions. All of which must be balanced with a sports car styling and esthetic. Since this sports car will apply two electric motors to drive front axle and a high-rev V6 turbo charged engine in series with a 9-speed double-clutch transmission to drive rear axle, additional cooling was required, yielding a total of ten air cooled heat exchangers. It is also a challenge to introduce cooling air into the rear engine room to protect the car under severe thermal conditions.
2015-04-14
Technical Paper
2015-01-1228
Zhuoran Zhang, Miriam Di Russo, Xianfeng Yan, Ahmed I. Uddin, Dhanya Sankaran, Jerry C. Ku
This paper presents the work performed by the Wayne State University (WSU) EcoCAR 3 student design competition team in its preparation for the hybrid electric vehicle architecture selection process. This process is recognized as one of the most pivotal steps in the EcoCAR 3 competition. With a key lesson learned from participation in EcoCAR 2 on “truly learning how to learn,” the team held additional training sessions on architecture selection tools and exercises with the goal of improving both fundamental and procedural skills. The work conducted represents a combination of the architecture feasibility study and final selection process in terms of content and procedure, respectively. At the end of this study the team was able to identify four potentially viable hybrid powertrain architectures, and thoroughly analyze the performance and packaging feasibility of various component options.
2015-03-30
Technical Paper
2015-01-0094
Supakit Rooppakhun, Pornporm Boonporm, Worawat Puangcha-um
The method of analyzing the best thin-wall-tubed cross-sectional shape of impact attenuator for student formula is proposed in this study by ways of simulation and validation in any case following SAE rules. We performed using ANSYS-Explicit Dynamics method for simulation and compared the result like energy absorption among six cross-sectional shaped circle, square, hexagon, cone, square pyramid and hexagonal pyramid. The results show that at the certain deformation, the circle-shaped absorbs energy higher than others. Cone, square pyramid, hexagonal pyramid, hexagon and square can absorb the energy compare to circle as 68.5%, 53.9%, 47.8%, 30% and 1.8% respectively. We compared the result of circle cross sectional case to the quasi static experiment and found that it was in the same trend.
2015-02-20
Book
This valuable resource lists all Aerospace Standards (AS), Aerospace Recommended Practices (ARP), Aerospace Information Reports (AIR), and Aerospace Resource Documents (ARD) published by SAE. Each listing includes title, subject, document number, key words, new and revised documents, and DODISS-adopted documents. AMS Index - Now Available!
2015-01-28
Article
Engineering Launch Manager Mike Rogers and his team handled new powertrain, body, and trim complexities as they guided Ford's new C/D-class product from development to production at a new plant.
2015-01-28
WIP Standard
EIA649-2
This document applies to hardware and software and provides CM requirements to be used for NASA Acquisitions and in House DDT&E activities as tailored by the customer or acquirer. The requirements have been organized using the five CM functions and 37 CM principles contained in the SAE 649B Standard: a. Configuration Planning and Management b. Configuration Identification c. Configuration Change Management d. Configuration Status Accounting e. Configuration Verification and Audit
2015-01-23
WIP Standard
AS6317
This document applies to hardware and software and provides CM requirements to be used for NASA Acquisitions and In House DDT&E activities as tailored by the customer or acquirer. The requirements have been organized using the five CM functions and 37 CM principles contained in the SAE 649B Standard: a. Configuration Planning and Management b. Configuration Identification c. Configuration Change Management d. Configuration Status Accounting e. Configuration Verification and Audit
2015-01-22
Article
The web-based methodology can provide a quick way for companies to share design tools and shorten development cycles, but many companies remain cautious about moving to the cloud, though it’s being tried out by small and mid-sized suppliers.
2015-01-20
Standard
J300_201501
This SAE Standard defines the limits for a classification of engine lubricating oils in rheological terms only. Other oil characteristics are not considered or included.
2015-01-15
Standard
AS6502
This SAE Aerospace Standard (AS) provides classical propulsion system performance parameter names for aircraft propulsion systems and their derivatives, and describes the logical framework by which new names can be constructed. The contents of this document were, originally, a subset of AS755E. Due to the growing complexity of station numbering schemes described in AS755, and a desire to expand the original document’s nomenclature section to include a fuller representation of “classical” (legacy use) names, a decision was made to separate its “station numbering” and “nomenclature” content into two separate documents. This document, then, was created using the “nomenclature” half of AS755E. Both documents will continue to be improved and revised as industry needs dictate. The parameter naming conventions presented herein are for use in all communications concerning propulsion system performance such as computer programs, data reduction, design activities, and published documents.
2015-01-14
Technical Paper
2015-26-0011
Ilango Panneerselvan, Suresh Arikapudi, Smitan Brahmbhatt, Tanushree Madhugiri, Om Prakash
Abstract A hybrid electric powertrain being a complex system requires analysis of all its subsystems to optimally utilize, size components for performance evaluation and control strategy development. An integrated high fidelity model of these can lower development costs, time and achieve the targeted performance while allowing for early redefinition of the system. A high fidelity model of a sedan car featuring chassis with longitudinal and lateral dynamics, suspension with joints, tires calculating longitudinal & lateral forces during vehicle motion, Engine model with combustion & dynamics of reciprocating and rotating components, Electric motors, Battery system, and gearbox with synchronizers and friction components was developed. Powertrain components were interconnected using 3D rotational flanges. Weight distribution was accomplished by appropriately locating various powertrain components using 3D supporting mounts, which help to study the mount forces as well.
2015-01-14
Technical Paper
2015-26-0005
Vishakha S Bhagat, Siva Murugesan, Shamsundara Venkataramaiah Belavadi, Abhay Vijay Mannikar
Abstract The death toll due to traffic accidents in India is on a rise, according to the latest Road Transport ministry report, a total of 4.97 lakh road accident was reported in 2011. Though compared to 2010, the accidents have gone down by 1,945, the number of deaths at 1,42,485 has increased by over 7,000.[1] This paper proposes a design of an Emergency Intimation System (EIS) tailored to fit for Indian consumer needs and available infrastructure. EIS is an emergency alert technology devised to assist drivers and passenger in an event of vehicle crash. Majority of deaths are caused by slow accident response time. EIS is aimed to lower this response time and ensure that the required rescue and medical services are made available in time. This device employed to make this emergency alerts will be fitted into the vehicle Electrical and Electronics (E/E) architecture and will have interfaces with crash sensor network, CAN network and GSM etc.
2015-01-14
Technical Paper
2015-26-0019
Werner Bick, Cagri Cevik, Christoph Steffens
Abstract In order to minimize the development and production costs in the automotive industry, despite steadily increasing variety of models and applications offered by the OEMs, the pressure on standardization of components and production processes is increasing continuously. As a direct consequence, modular engine families are already established with high degrees of common parts and kits as well as standardized interfaces for all vehicle platforms by most manufacturers these days. At the same time, the world adopted and announced massive legal demands concerning the reduction of CO2 emissions for the entire vehicle fleet. In addition to the optimization of the combustion process, the exhaust gas aftertreatment and thermal management, the use of improved and more resilient materials for higher reduction of mechanical friction leads to a significant amount of the realized lowering in fuel consumption respective CO2 emissions.
2015-01-14
Technical Paper
2015-26-0031
Alberto Boretti, Joseph Scalzo
Abstract The present paper is an introduction to a novel rotary valve engine design addressing the major downfalls of past rotary valves applications while permitting the typical advantages of the rotary valves. Advantages of the solution are the nearly optimal gas exchange, mixture formation, ignition and combustion evolution thanks to the large gas exchange areas from the two horizontal valves per engine cylinder, the good shape of the combustion chamber, the opportunity to place a direct fuel injector and a spark or jet ignition device at the centre of the chamber. The novel engine design also permits higher speed of rotation not having reciprocating poppet valves and the reduced friction losses of the rotating only distribution. This translates in better volumetric efficiencies, combustion rates and brake mean effective pressures for improved power density and fuel efficiency. Additional advantages are the reduced weight and the better packaging.
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