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Viewing 61 to 90 of 22391
Technical Paper
2014-09-30
Sauhard Singh, Reji Mathai, Ved Singh, A K Sehgal, B Basu, R K Malhotra, S Nagarajan, S Yoganandam, G Senthil Kumar, G Gopal
Air Pollution is a serious global problem. Increase in population the growing demands further aggravates it. This has resulted in exploring alternative fuel for internal combustion (IC) engines. Some of the promising alternative fuels are Compressed Natural Gas (CNG), Hydrogen, LPG, Ethanol etc. CNG is gaining popularity as fuel in transport sector due to lower carbon to hydrogen ratio, cost & infrastructure. Hydrogen (H2) for IC engines is considered as a future fuel due to carbonless structure. But several obstacles need to be overcome before commercialization of H2 as an IC engine fuel for transport sector. Presently, lack of hydrogen infrastructure and refuelling stations prevent widespread introduction of hydrogen vehicles. One of the solutions is to blend hydrogen to CNG. Such types of blends acquire benefit of the unique combustion properties of hydrogen and at the same time reduce the demand for pure hydrogen. Also these blends can use the existing natural gas infrastructure and existing CNG engine without any major hardware modification.
Technical Paper
2014-09-30
Alexander Sappok, Leslie Bromberg
Abstract Diesel Particulate Filters (DPF) are a key component in many on- and off-road aftertreatment systems to meet increasingly stringent particle emissions limits. Efficient thermal management and regeneration control is critical for reliable and cost-effective operation of the combined engine and aftertreatment system. Conventional DPF control systems predominantly rely on a combination of filter pressure drop measurements and predictive models to indirectly estimate the soot loading state of the filter. Over time, the build-up of incombustible ash, primarily derived from metal-containing lubricant additives, accumulates in the filter to levels far exceeding the DPF's soot storage limit. The combined effects of soot and ash build-up dynamically impact the filter's pressure drop response, service life, and fuel consumption, and must be accurately accounted for in order to optimize engine and aftertreatment system performance. This work applied a radio frequency (RF) sensor to directly monitor diesel particulate filter soot and ash levels, thereby enabling direct feedback control of the filter based on its actual loading state.
Technical Paper
2014-09-30
Michael Franke, Shirish Bhide, Jack Liang, Michael Neitz, Thomas Hamm
Abstract Exhaust emission reduction and improvements in energy consumption will continuously determine future developments of on-road and off-road engines. Fuel flexibility by substituting Diesel with Natural Gas is becoming increasingly important. To meet these future requirements engines will get more complex. Additional and more advanced accessory systems for waste heat recovery (WHR), gaseous fuel supply, exhaust after-treatment and controls will be added to the base engine. This additional complexity will increase package size, weight and cost of the complete powertrain. Another critical element in future engine development is the optimization of the base engine. Fundamental questions are how much the base engine can contribute to meet the future exhaust emission standards, including CO2 and how much of the incremental size, weight and cost of the additional accessories can be compensated by optimizing the base engine. This paper describes options and potentials to improve the base engine for future commercial and industrial engines.
Technical Paper
2014-09-30
Xinyu Ge, Yongli Qi, Kai Zhang
Fuel properties impact the engine-out emission directly. For some geographic regions where diesel engines can meet emission regulations without aftertreatment, the change of fuel properties will lead to final tailpipe emission variation. Aftertreatment systems such as Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR) are required for diesel engines to meet stringent regulations. These regulations include off-road Tier 4 Final emission regulations in the USA or the corresponding Stage IV emission regulations in Europe. As an engine with an aftertreatment system, the change of fuel properties will also affect the system conversion efficiency and regeneration cycle. Previous research works focus on prediction of engine-out emission, and many are based on chemical reactions. Due to the complex mixing, pyrolysis and reaction process in heterogeneous combustion, it is not cost-effective to find a general model to predict emission shifting due to fuel variation. Some empirical models use testing data as input to locate relationships between controlled inputs and engine response.
Technical Paper
2014-09-30
Ilya A. Kulikov, Elena E. Baulina, Andrey I. Filonov
Abstract The paper gives a short description of the University's developments in the field of hybrid electric powertrains and vehicles as well as a survey of theoretical instruments utilized in these works for elaboration of powertrains control strategies. At the present, two units fitted with hybrid powertrains are in operation. These are the four-wheel-drive SUV and the powertrain test rig. Both allow to test different powertrain configurations. Prior to implementing a certain configuration in the rig, a theoretical research of powertrain is conducted to reveal its properties and find a way to control it optimally. The basic tool adopted for that purpose is R.Bellman's dynamic programming (DP). The paper gives an example of applying DP to explore a potential of decreasing fuel consumption and pollutant emissions of a light commercial vehicle by converting its powertrain into hybrid one. During this study, a contradiction has emerged between minimizing fuel consumption and emissions of NOx.
Technical Paper
2014-09-16
Rudolf Neydorf, Youriy Sigida, Nikita Kudinov, Elena Portnova
Abstract Airship dimensions define the application of the computer modeling methods under their development and investigation. Herein, the need to simulate the flight environment state - the atmospheric conditions of their traffic route - arises. The atmospheric parameters have both regular and random components, which is due to the nonstationarity of the atmospheric phenomena. Hence, it is essential to define the actual ranges, and the representative values of the atmospheric effects. Weather data are used for the analysis and the airflow performance computation in the operational area. Through their statistical processing, we need to obtain the most informative characteristics of the weather conditions in whole, and of their trends. The investigation has shown that the weather data gathering system is nonperfect. The sampling frequency is irregular and not high, test values in the specific parameters are obtained asynchronously. At this, altitude is the most critical parameter under measuring, and all the observable parameters are to be referenced to the altitude in the problem on the flight environment parameter simulation.
Technical Paper
2014-09-16
Samira Keivanpour, Christian Mascle, Daoud Ait Kadi
The End of Life phase of Aircraft is a relatively complex phase in life cycle of this product. The retired Aircrafts need to be parked in certain conditions. Some valuable parts are disassembled and the rest of them are dismantled. Materials are separated and upgraded, waste is burned or deserted and toxic materials restrained or incinerated. All of these activities should be performed in an ecologically right manner; however, collectively produced added values for all stakeholders need to be considered. This paper aims to provide a conceptual framework for value chain analysis of Aircraft recycling process in the context of sustainable development. The value chain related to recycling aircraft at the end of life was chosen to generate an in-depth analysis of the value chain, considering environmental and socio-economic concerns. The value chain framework for recycling of fleets is identified. The key processes with environmental and social impacts are determined. The decision making process along the value chain and the policy framework including codes, regulations and standards are addressed.
Article
2014-09-09
The University of California-Davis, and CATARC (China Automotive Technology and Research Center) will cooperate to speed commercialization of plug-in and fuel-cell electric cars in China and the U.S. under an agreement signed Sept. 6 in Tianjin, China.
Article
2014-09-05
Days before Tesla on Sept. 4 announced it has selected Nevada as the state in which it will build a large "Gigafactory' battery plant, Lux Research opined that the savings in lithium-ion battery costs owing to high-volume efficiencies will not be as much as the automaker expects it to be.
Article
2014-09-02
We huddled in a tight circle by the finish line, frantically waiting for radio updates on the progress of our team’s rider, Rob “Bullet” Barber, who was miles in the distance and closing fast. Our 11-person team of student engineers and support crew from The Ohio State University could hardly breathe as we got the report: Barber was battling for third place—a podium finish—in the TT Zero class for electric racing motorcycles at the 2014 Isle of Man TT.
Article
2014-09-02
The WSU team found an edge over the competing designs by employing liquid hydrogen (LH2) storage to maximize station capacity and reduce capital and operating costs. Delivering hydrogen in liquid form reduces the energy used for distribution, and 80-90% of small-merchant hydrogen is delivered via cryogenic liquid tanker truck.
Magazine
2014-09-01
Teams make unique statements at FSAE Michigan Some statements produced better results than others, but all teams walked away from the 2014 FSAE Michigan event with invaluable hands-on engineering experience. Teams get 'super' results at SAE Supermileage University students from around the world gathered in Marshall, MI, to determine which team could achieve the highest fuel economy at the 353th anniversary of the competition. Competition winners react to attaining coveted F1 engineering roles Two of the winners have Formula SAE experience on their side.
Article
2014-08-27
As part of the U.S. DOE SuperTruck program that was awarded to Cummins and Peterbilt Motors, a series of investigations was conducted on the aerodynamic ramifications of traffic. One such investigation, carried out by experts from Peterbilt and design software provider Exa Corp., focuses on the impact of traffic conditions on aerodynamic drag for typical tractor-trailer separation distances at typical highway speeds.
Article
2014-08-26
Tesla Motors is learning that making trouble-free autos is no easy task. In this week's SAE Eye on Engineering, Senior Editor Lindsay Brooke looks at the American electric car maker and recent reports of problems with its Model S luxury sedan.SAE Eye on Engineering can be viewed at http://youtu.be/kgbdTHxuegw.
Article
2014-08-20
Boeing, South African Airways (SAA), and SkyNRG are collaborating to make sustainable aviation biofuel from a new type of tobacco plant. This initiative broadens cooperation between Boeing and SAA to develop renewable jet fuel in ways that support South Africa's goals for public health as well as economic and rural development.
Article
2014-08-18
Volvo Bus and Swiss technology group ABB are collaborating to develop and commercialize hybrid- and full-electric buses that employ “open standards-based” dc fast-charging systems. Buses will be charged quickly through an automatic roof-top connection system at bus stops, or through cabled charging systems overnight.
Article
2014-08-13
Rick Phillips, Senior Director, Commercial and OTR Sales, for Yokohama Tire Corp., provides his thoughts on the company's first U.S. commercial tire plant, scheduled to open in October 2015, as well as what the market can expect in the coming years.
Article
2014-08-13
As alternatives to silicon (Si), use of wide-bandgap materials (WBGs) such as silicon carbide (SiC) and gallium nitride (GaN) for power electronics in electric vehicles and plug-in hybrid-electric vehicles can have a major impact on systems and overall vehicle costs, according to a Lux Research report.
Standard
2014-08-13
Various SAE vehicle sound level measurement procedures require use of a sound level meter which meets the Type 1 or Type 2 requirements of ANSI S1.4-1983 (see 2.1.1.1), or an alternative system which can be proved to provide equivalent test data. The purpose of this SAE Recommended Practice is to provide a procedure for determining if a sound data acquisition system (SDAS) has electro-acoustical performance equivalent to such a meter. By assuring equivalent performance of the test instrumentation, the equivalence of test data is assured. Two general configurations of sound data acquisition systems will be encompassed (see Figure 1). The first configuration consists of instrument sections which perform as a sound level meter. The second configuration is a system which records data for later processing. The intent of this document is to establish guidelines which permit the test engineer to insure equivalence of sound data acquisition systems to a sound level meter. It requires that the test engineer have a working knowledge of the characteristics of the sound data being measured.
Article
2014-08-12
AC17 test reporting begins in 2015. Initially it "gifts" applicable CAFE A/C efficiency credits, but leads to mandatory use. Industry also looks to reduce A/C-induced EV range loss from solar loading using films, glass, pre-ventilation.
Standard
2014-08-11
SAE J1979 / ISO 15031-5 set includes the communication between the vehicle's OBD systems and test equipment implemented across vehicles within the scope of the legislated emissions-related OBD.
Book
2014-08-06
Daniel Vallero
This thoroughly revised fifth edition of Fundamentals of Air Pollution has been updated throughout and remains the most complete text available, offering a stronger systems perspective and more coverage of international issues relating to air pollution. Sections on pollution control have been reorganized and updated to demonstrate the move from regulation and control approaches to green and sustainable engineering approaches. This edition maintains a strong interdisciplinary approach to the study of air pollution, covering such topics as chemistry, physics, meteorology, engineering, toxicology, policy, and regulation. New material includes near-road air pollution, new risk assessment approaches, indoor air quality, the impact of biofuels and fuel additives, mercury emissions, forecasting techniques, and the most recent results from the National Air Toxics Assessment. Main topics covered are: • Systems approach, emphasizing the impact of air pollution on ecosystems and human health • Risks, measures, models, and control of air pollution • International issues, including coverage of European initiatives and discussions of the impact of emerging economies like India and China • Updated references, standards, and methods
Article
2014-08-05
Airbus, British Airways (BA), Heathrow Airport (LHR), and NATS (the main air navigation service provider in the U.K.) have established a partnership to study and develop operational procedures to reduce the number of people affected by noise around London’s Heathrow.
Standard
2014-08-05
This Digital Annex (DA) contains the current, full-PDF version of ARP5149B, Training Program Guidelines for Deicing/Anti-Icing of Aircraft on Ground, as well as .jpeg format files of Appendix D, Application Guidelines Configuration, Critical Component, and Spray Area Diagrams for Aircraft. The .jpeg diagram files may be used by purchasers in accordance with the terms of the included license agreement.
Article
2014-07-31
Panasonic will handle the cell-making activity at Tesla's coming battery manufacturing facility dubbed the Gigafactory, the two companies announced July 31. Panasonic already supplies cylindrical (18650 type) battery cells for the Tesla Model S from its factories in Japan.
Article
2014-07-30
The Electric Power Research Institute has announced a collaboration with 8 automakers and 15 utilities to develop and demonstrate an open grid integration platform for plug-in electric vehicles (PEVs).
Article
2014-07-25
Ford pickup customers have already embraced turbo V6 power in the current steel F-150. The all-new, smaller 2.7-L V6, packing 325 hp and 375 lb-ft, in a truck that is more than 700-lb lighter than the incumbent model, should find an equally willing audience.
Article
2014-07-24
SAE International recently published J2601 “Fueling Protocols for Light Duty Gaseous Hydrogen Surface Vehicles,” the light-duty hydrogen-fueling protocol that will serve as the baseline for fueling the first generation of hydrogen fuel cell electric vehicle (FCEVs).
WIP Standard
2014-07-22
A program, which ensures quality with the relevant standards shall be introduced for all on-line Stations where de-icing/anti-icing of aircraft on the ground is either normally carried out, or where local conditions may periodically lead to a requirement for airplcraft to be de-iced/anti-iced. Deficiencies, in regard to a Station's local de-icing/anti-icing procedures, shall be identified and subsequently actioned through this program, thereby ensuring that the required safety standards are maintained.
Standard
2014-07-22
This AS describes a standard method for viscosity measurements of thickened (AMS1428) anti-icing fluids. Fluid manufacturers may publish alternate methods for their fluids. In case of conflicting results between the two methods, the manufacturer method takes precedence. To compare viscosities, exactly the same measurement elements (including spindle and container size) must have been used to obtain those viscosities.
Viewing 61 to 90 of 22391

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