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Viewing 151 to 180 of 22467
2014-08-26
Article
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.
2014-08-20
Article
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.
2014-08-18
Article
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.
2014-08-13
Article
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.
2014-08-13
Article
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.
2014-08-13
Standard
J184_201408
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.
2014-08-12
Article
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.
2014-08-11
Standard
J1979_201408
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.
2014-08-06
Book
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
2014-08-05
Article
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.
2014-08-05
Standard
ARP5149BDA
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.
2014-07-31
Article
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.
2014-07-30
Article
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).
2014-07-25
Article
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.
2014-07-24
Article
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).
2014-07-22
WIP Standard
AS6332
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.
2014-07-22
Standard
AS9968
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.
2014-07-15
Article
Electric propulsion has been limited so far to small movements of the satellites once it is in its geostationary orbit. The Boeing 702SP innovation is its use of electric propulsion to raise the satellite from its launch-vehicle drop-off point to geostationary orbit.
2014-07-09
Article
The U.S. National Highway Traffic Safety Administration (NHTSA) is planning to prepare an Environmental Impact Statement (EIS) to analyze the potential environmental impacts of new fuel-efficiency standards for commercial medium- and heavy-duty on-highway vehicles and work trucks, potentially covering engines, chassis, vehicles, and/or trailers manufactured after model year 2018.
2014-07-08
Article
A simpler spin on hybrids relies on mechanical flywheels and push-belts rather than batteries and motors
2014-07-08
WIP Standard
AIR6504
This SAE Aerospace Information Report (AIR) provides a method for assessing particle losses that occur in a sampling system of specified geometry based on the nvPM mass and number measured at the end of the sampling system. Both size dependent diffusion loss and size independent thermophoretic loss mechanisms are included in the method. The penetration function of that system must be determined by measurement and/or by computation using an analytical method as described within this report. The outcome of this line loss assessment provides estimated correction factors for nvPM mass and number concentration with associated uncertainties based upon nvPM measurement uncertainties and method assumptions. These correction factors give an estimation of nvPM mass and number values at the inlet to the sampling system.
2014-07-07
Article
The U.S. Department of Energy's Fuel Cell Technologies Office has issued a request for information (RFI) to the research community and relevant stakeholders, according to a release. The DOE is seeking feedback about fuel-cell technology validation, commercial acceleration, and potential deployment strategies for continuous fuel-cell rechargers (range-extenders) on board light-duty battery-electric vehicle fleets. 
2014-07-01
Article
A new version of Elektrobit's (EB's) Assist Electronic Horizon Solution features new functions that offer more flexibility for implementing predictive driver assistance systems.
2014-07-01
Magazine
Global Viewpoints The latest strategies are investigated for vehicle development by automakers and major suppliers. Sports cars embrace array of green technology IMSA Tudor United SportsCar Championship promotes a variety of green technologies to link racing to the road. More gears, more challenges Many strategies, as well as key software and hardware aspects related to controllers, networks, sensors, and actuators, must be considered to keep automatic transmissions shifting smoothly as more gears are added to improve fuel economy. Advancing structural composites Industry experts address the opportunities and challenges involved with moving toward composite-intensive vehicles, including Nissan's effort to produce a high-volume, fully recyclable composite liftgate with low metal content.
2014-07-01
Technical Paper
2014-01-9050
Praveen Chavannavar
Abstract Various engine platforms employ Selective Catalytic Reduction (SCR) technology to reduce the tail pipe emissions of oxides of nitrogen (NOx) from diesel engines as part of an overall strategy to comply with the emission regulations in place in various countries. High levels of NOx conversion (greater than 98%) in SCR aftertreatment may provide operating margin to increase overall fuel efficiency. However, to realize the potential fuel efficiency gains, the SCR technology employed should achieve high NOx conversion with limited reductant slip over transient application cycles in addition to steady state operation. A new approach to SCR controls was developed and implemented. This approach does not rely on any maps to determine the amount of urea solution to be dosed, thus significantly reducing calibration and development time and effort when implementing the SCR technology on multiple engine platforms and applications. In addition, the controls technique is completely model based and was able to achieve high NOx conversion efficiencies through the SCR system, while ensuring limited ammonia slip due to sharp transient events in the application cycle.
2014-07-01
Technical Paper
2014-01-9049
Björn Lundberg, Jonas Sjoblom, Åsa Johansson, Björn Westerberg, Derek Creaser
Parameter tuning was performed against data from a full scale engine rig with a Diesel Oxidation Catalysts (DOC). Several different catalyst configurations were used with varying Pt loading, washcoat thickness and volume. To illustrate the interplay between kinetics and mass transport, engine operating points were chosen with a wide variation in variables (inlet conditions) and both transient and stationary operation was used. A catalyst model was developed where the catalyst washcoat was discretized as tanks in series both radially and axially. Three different model configurations were used for parameter tuning, evaluating three different approaches to modeling of internal transport resistance. It was concluded that for a catalyst model with internal transport resistance the best fit could be achieved if some parameters affecting the internal mass transport were tuned in addition to the kinetic parameters. However it was also shown that a model with negligible internal transport resistance still could obtain a good fit since kinetic parameters could compensate for transport limitations.
2014-07-01
Technical Paper
2014-01-9048
Jingyi Zhang, Fuyuan Yang
Abstract This paper was targeted on achieving in-cycle real-time prediction of NOx emission of diesel engines in both steady-state and transient processes based on cylinder pressure. Specifically, input parameters of the NOx emission model were determined, an offline empirical model of NOx emission was built based on steady-state test data, and in-cycle real-time prediction of NOx emission was achieved in the in-cylinder combustion analysis tool. Based on the mechanism of NOx formation, combustion state parameters in strong correlation with NOx emission were extracted from cylinder pressure, rate of cylinder pressure, rate of heat release, accumulated heat release and burned zone temperature. Quantitative correlations between combustion state parameters and NOx emission were calculated based on steady-state test data and the inputs of the empirical model of NOx emission were determined. The quadratic polynomial model from combustion state parameters to NOx emission was built based on steady-state test data.
2014-06-30
Article
Harley-Davidson has for a number of years dispatched an engineer to SAE's annual Hybrid & Electric Vehicle Symposium for the purpose of gathering intel and making contacts in the EV field. One tangible result of Harley's SAE participation is Project LiveWire, the company’s first electric motorcycle concept.
2014-06-30
Article
On a global scale, racecars burn an irrelevant amount of fuel, so racing series’ interest in fuel-saving technology has nothing to do with saving the planet from racecars’ environmental impact. Transporting teams to the tracks burns far more fossil fuels than any fuel actually consumed at the track.
2014-06-26
Article
The Department of Energy’s Oak Ridge National Laboratory (ORNL) has launched its new Institute for Functional Imaging of Materials, which aims to accelerate discovery, design, and deployment of new materials, according to a release from the laboratory.
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