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2016-04-05
Journal Article
2016-01-0281
Alaa El-Sharkawy, Dipan Arora, Abd El-Rahman Hekal, Amr Sami, Muhannad Hendy
In this paper, transient component temperatures in the vehicle under-hood and underbody are estimated. The main focus is on the component temperatures as a result of radiation from exhaust, convection by underbody or under-hood air and heat conduction through the components. The exhaust surface temperature is simulated as function of time and for various vehicle duty cycles such as city traffic, road load and grade driving conditions. At each time step the radiation flux to the surrounding component is estimated, heat addition or removal by convection is evaluated based on air flow, air temperature and component surface area. Geometrical properties of the components are obtained by fitting them into pre-set shapes (e.g., cylinders, spheres, ellipsoids, etc.).
2016-04-05
Technical Paper
2016-01-0865
R. Lockett, Mahesh Jeshani, Kassandra Makri, Richard Price
Laser Sheet Dropsizing (LSD) is a recently developed optical diagnostic that has proven to be useful for the determination of relative liquid volume fraction and Sauter Mean Diameter (SMD) distributions in combusting, evaporating and non-evaporating sprays. The present work focuses on primary atomization in diesel sprays obtained from 250 bar and 350 bar rail pressures respectively, in order to identify the effect of distillation profile and rail pressure on the drop size distribution in the sprays obtained during primary atomization. Solutions of Rhodamine-B in 1-decanol and 1-octanol respectively were added to samples of conventional crude-oil derived middle-distillate diesel (distillation profile range 200 oC - 360 oC) and light distillate kerosene (distillation profile range 160 oC - 180 oC). These mixtures were delivered into an optically accessible Denso mini-sac injector, using a custom-designed and manufactured high-pressure common rail diesel fuel injection (FIE) system.
2016-04-05
Technical Paper
2016-01-0266
Greg K. Caswell, James McLeish
Package technology is constantly improving in order to keep up with the advances in silicon technology. MEMS packages exhibit several failure modes that can be predicted using modern software tools. This paper provides a methodology for creating a high-fidelity model of the interposer with all the conductor geometries. The two failure modes that are explored with this model are package warpage prediction due to actual copper imbalance and filled microvia delamination. Each layer can meshed based on the actual geometry in the layout design. Package warpage is caused by copper imbalance between the two sides of the interposer. The CTE mismatch between the two sides can bend the package to such a degree that it becomes impossible to assemble the solder interconnects. The filled microvias have copper structures that can delaminate from the copper traces in the conductor layers.
2016-04-05
Technical Paper
2016-01-0278
Philipp Bergmeir, Christof Nitsche, Jürgen Nonnast, Michael Bargende
In order to achieve high customer satisfaction and to avoid high warranty costs caused by component failures of the power-train of hybrid electric vehicles (HEV), car manufacturers have to optimize the dimensioning of these elements. Hence, it is obligatory for them to gain knowledge about the different types of vehicle usage being predominant all over the world. Therefore, in this paper we present a Data Mining system that combines an Autoencoder, i.e., a special kind of Artificial Neural Network used for unsupervised representation learning, with t-Distributed Stochastic Neighbor Embedding, i.e., a technique for dimensionality reduction, to automatically identify and visualize different types of vehicle usage by applying them to aggregated logged on-board data, i.e., load spectrum data.
2016-04-05
Journal Article
2016-01-0282
Julio Abraham Carrera
Recent emissions standards have become more restrictive in terms of CO2 and NOx reduction. This has been translated into higher EGR rates at higher exhaust gas temperatures with lower coolant flow rates for much longer lifetimes. In consequence, Thermal Load for EGR coolers has been increased and boiling and its interaction with thermal fatigue are now a critical issue during their development. It is almost impossible to avoid localized boiling inside an EGR cooler and, in fact, it would not be strictly necessary when it is below the Critical Heat Flux (CHF). However when CHF is exceeded, film boiling occurs leading to the sudden drop of the heat transfer rate and the metal temperature rise. In consequence, thermal stress increases even when film boiling is reached only in a small area inside the part. It is very difficult to accurately predict under which conditions CHF is reached and to stablish the margins to avoid it.
2016-02-11
Standard
AMS2642E
This specification covers a procedure for revealing the macrostructure and microstructure of selected titanium alloys.
2016-02-09
WIP Standard
ARP6379
This Aerospace Recommended Practice describes an application-specific qualification process for electrical, electronic, and electromechanical (EEE) parts and sub-assemblies in aerospace, defense, and high performance (ADHP) systems.
2016-02-09
WIP Standard
J1939/73
SAE J1939-73 Diagnostics Application Layer defines the SAE J1939 messages to accomplish diagnostic services and identifies the diagnostic connector to be used for the vehicle service tool interface. Diagnostic messages (DMs) provide the utility needed when the vehicle is being repaired. Diagnostic messages are also used during vehicle operation by the networked electronic control modules to allow them to report diagnostic information and self-compensate as appropriate, based on information received. Diagnostic messages include services such as periodically broadcasting active diagnostic trouble codes, identifying operator diagnostic lamp status, reading or clearing diagnostic trouble codes, reading or writing control module memory, providing a security function, stopping/starting message broadcasts, reporting diagnostic readiness, monitoring engine parametric data, etc.
2016-02-05
Magazine
Off-highway hybrids: Opportunities and challenges With oil prices declining and emissions regulations in North America 'stabilized,' is there a place for hybrid powertrains in this new world of cheap oil? Looking for a better image Display advances are helping to reduce operator fatigue. Charging up electrified powertrains Control technologies race forward while batteries improve and adopt standard sizes. Measuring and accounting for suspension TARDEC teamed with SEA Ltd. to develop a system to measure the suspension parameters, center of gravity, and moments of inertia of wheeled vehicles in the never ending quest to model and predict vehicle dynamic behavior. Looking at mobility in 2050 Cuneyt L. Oge begins his term as 2016 SAE International President with a vision about the future of auto- and aero-mobility.
2016-02-03
Standard
J1555_201602
This SAE Recommended Practice applies to all portions of the vehicle, but design efforts should focus on components and systems with the highest contribution to the overall average repair cost (see 3.7). The costs to be minimized include not only insurance premiums, but also out-of-pocket costs incurred by the owner. Damageability, repairability, serviceability and diagnostics are inter-related. Some repairability, serviceability and diagnostics operations may be required for collision or comprehensive loss-related causes only. Some operations may be for non-collision-related causes only (warranty, scheduled maintenance, non-scheduled maintenance, etc.). Some may be required for both causes. The scope of this document deals with only those operations that involve collision and comprehensive insurance loss repairs.
2016-02-03
WIP Standard
ARP5595B
This SAE Aerospace Recommended Practice (ARP) aims at providing general utilization guidelines and calculation methods adequate to guarantee the effectiveness and ultimate load strength of tie-down/lashing arrangements performed to restrain cargo on board civil transport aircraft during flight: a. cargo loaded and tied down onto airworthiness certified air cargo pallets, themselves restrained into aircraft lower deck, main deck or upper deck cargo systems meeting the requirements of NAS 3610, or b. additional tie-down on aircraft structure when necessitated by pallet maximum gross mass or CG, or c. non-unitized individual pieces of cargo, or pieces of cargo placed onto an unrestrained ("floating") pallet into either lower deck or main deck containerized cargo compartments of an aircraft, or d. individual pieces of load loaded in non-containerized (bulk loaded) baggage or cargo compartments.
2016-02-03
WIP Standard
AS36102B
This SAE Aerospace Standard (AS) provides requirements on how to test air cargo Unit Load Devices (ULD).
2016-02-01
WIP Standard
J2012
This document supersedes SAE J2012 DEC2007, and is technically equivalent to ISO 15031-6:2010 with the exceptions described in Section 1.2. This document is intended to define the standardized Diagnostic Trouble Codes (DTC) that On-Board Diagnostic (OBD) systems in vehicles are required to report when malfunctions are detected. SAE J2012 may also be used for decoding of enhanced diagnostic DTCs and specifies the ranges reserved for vehicle manufacturer specific usage. This document includes: a. Diagnostic Trouble Code format. b. A description of the standardized set of Diagnostic Trouble Codes and descriptions contained in SAE J2012-DA. The two most significant bytes of a DTC may be decoded according to two different lists; DTC Format Identifier 0x00 and 0x04. c. A description of the standardized set of Diagnostic Trouble Codes subtypes known as Failure Types contained in SAE J2012-DA (applies only when three byte DTCs are used).
2016-01-29
WIP Standard
EIASTD4899C
This document applies to the development of Plans for integrating and managing electronic components in equipment for the military and commercial aerospace markets; as well as other ADHP markets that wish to use this document.

Examples of electronic components, as described in this document, include resistors, capacitors, diodes, integrated circuits, hybrids, application specific integrated circuits, wound components, and relays.

It is critical for the Plan owner to review and understand the design, materials, configuration control, and qualification methods of all “as-received” electronic components, and their capabilities with respect to the application; identify risks, and where necessary, take additional action to mitigate the risks.

The technical requirements are in Clause 3 of this standard, and the administrative requirements are in Clause 4.

2016-01-26
WIP Standard
EIA4900A
This document prescribes processes for using semiconductor devices in wider temperature ranges than those specified by the device manufacturer. It applies to any designer or manufacturer of equipment intended to operate under conditions tht require semiconductor devices to function in temperature ranges beyond those for which the devices are marketed. This document is intended for applications in which only the performance of the device is an issue. Even though the device is used at wider temperatures, the wider temperatures will be limited to those that do not compromise the system performance or application-specific reliability of the device in the application. Specifically, this document is not intended for applications that require the device to function at an operating or environmental stress level that significantly increases the risk of catastrophic device failure, loss of equipment function, or unstable operation of the device.
2016-01-22
Standard
J1939/73_201601
SAE J1939-73 Diagnostics Application Layer defines the SAE J1939 messages to accomplish diagnostic services and identifies the diagnostic connector to be used for the vehicle service tool interface. Diagnostic messages (DMs) provide the utility needed when the vehicle is being repaired. Diagnostic messages are also used during vehicle operation by the networked electronic control modules to allow them to report diagnostic information and self-compensate as appropriate, based on information received. Diagnostic messages include services such as periodically broadcasting active diagnostic trouble codes, identifying operator diagnostic lamp status, reading or clearing diagnostic trouble codes, reading or writing control module memory, providing a security function, stopping/starting message broadcasts, reporting diagnostic readiness, monitoring engine parametric data, etc.
2016-01-14
WIP Standard
ARP6852A

This document describes methods that are known to have been used by aircraft manufacturers to evaluate aircraft aerodynamic performance and handling effects following application of aircraft ground deicing/anti-icing fluids (“fluids”), as well as methods under development.

2016-01-12
WIP Standard
J1707
This SAE Recommended Practice provides basic recommendations for dispensing and handling of SAE J1703 and SAE J1704 Brake Fluids by Service Maintenance Personnel to assure their safe and effective performance when installed in or added to motor vehicle hydraulic brake actuating systems. This document is concerned only with brake fluid and those system parts in contact with it. It describes general maintenance procedures that constitute good practice and that should be employed to help assure a properly functioning brake system. Recommendations that promote safety are emphasized. Specific step-by-step service instructions for brake maintenance on individual makes or models are neither intended nor implied. For these, one should consult the vehicle manufacturer’s service brake maintenance procedures for the particular vehicle. Vehicle manufacturer’s recommendations should always be followed.
2016-01-07
WIP Standard
ARP1247E
This SAE Aerospace Recommended Practice (ARP) outlines the basic general design requirements for ground support equipment used in the civil air transport industry. It is intended to assist the airlines in standardizing requirements for various configurations of equipment. For procurement of equipment, sections of this document should be specified with due consideration of the functional and environmental requirements of the equipment, and to the relative cost of satisfying those requirements.
2016-01-06
Magazine
Time to get personal Industry engineers are combining apps, voice, the cloud, and other technologies such as artificial intelligence to enable drivers to customize their vehicles and anticipate their needs. Technology report GM and TARDEC co-developing fuel cell powered Chevrolet Colorado for military evaluation vehicles and anticipate their needs. Global vehicles Sports cars take center stage in Tokyo
2016-01-04
WIP Standard
AIR5552A
This information report provides general guidance for the design considerations, qualification in endurance, strength and fatigue of landing gear using composite components as principle structural elements. The information discussed herein includes the development and evaluation of design data considering: the potential for imbedded manufacturing defects, manufacturing process variations, the component operating environment, potential damage threats in service, rework and overhaul, and inspection processes. This AIR mainly discusses the use of thick composites for landing gear structural components. Considerations and recommendations provided in this AIR may therefore differ greatly from considerations and recommendations found in widely accepted composite design references such as CMH-17 and Advisory Circulars such as AC 20-107(B).
2016-01-03
WIP Standard
AIR6900
This AIR will address the need for a strategy to achieve aircraft operating certificate holder maintenance efficiencies within the existing regulatory environment as well as the need for regulation, policy, and guidance changes in the long-term to accommodate more complex IVHM solutions. This document will analyse which IVHM solutions can be incorporated within existing maintenance procedures and which also comply with regulations, policy, and guidance. One of the AIR’s objectives is to define best practices for aircraft operating certificate holders to engage with regulators to get approval for simpler IVHM applications leading to maintenance efficiencies. Additionally, this document will analyse the barriers that existing regulations, policy, and guidance present to the implementation of more advanced IVHM solutions. The result is a set of recommendations to certify and implement end-to-end IVHM solutions for the purpose of gaining maintenance efficiencies.
2016-01-02
Standard
AS1614D
This SAE Aerospace Standard (AS) specifies the interface requirements for tow bar attachment fittings on the nose gear (when towing operations are performed from the nose gear) of conventional tricycle type landing gears of commercial civil transport aircraft with a maximum ramp weight higher than 50,000 kg (110,000 pounds), commonly designated as “main line aircraft”. Its purpose is to achieve tow bar attachment fittings interface standardization by aircraft weight category (which determines tow bar forces) in order to ensure that one single type of tow bar with a standard connection can be used for all aircraft types within or near that weight category, so as to assist operators and airport handling companies in reducing the number of different tow bar types used.
2016-01-01
Book
“Spotlight on Design” features video interviews and case studies, focusing on technology breakthroughs, hands-on testimonials, and the importance of fundamentals. Viewers are virtually taken to industry labs and research centers to learn how design engineers solve real-life problems. These challenges include enhancing product performance, reducing cost, improving quality and safety, while decreasing environmental impact, and achieving regulatory compliance. In the episode “Engine Development for Performance and Efficiency” (22:00), engineers from Ricardo and General Motors explain the importance of lessons learned on the race tracks, how using the appropriate design and simulation tools expedite development, and present the new testing frontiers now available with 3D printing.
2015-12-21
WIP Standard
ARP6898
The goal of this new document is to provide criteria for managing, auditing, and controlling the use of rotating balancing tooling and associated support tools. A variety of subjects will be addressed including serialization and marking requirements, critical inspection criteria, performance tracking through tooling compensation trend analysis, handling of gage standards (rotor simulators, master blades, dummy blades, etc.), recommendations for periodic and preventive maintenance intervals, test recommendations to evaluate rotating tooling performance, requirements for traceable measures (such as torques, runouts, eccentricity, etc.), repeatability characterization, and criteria for return to service.
2015-12-17
Standard
ARP6852
This document describes methods that are known to have been used by aircraft manufacturers to evaluate aircraft aerodynamic performance and handling effects following application of aircraft ground deicing/anti-icing fluids (“fluids”), as well as methods under development. Guidance and insight based upon those experiences are provided, including: - Similarity Analyses - Icing Wind Tunnel Tests - Flight Tests - Computational Fluid Dynamics and other Numerical Analyses This document also describes: - The history of evaluation of the aerodynamic effects of fluids - The effects of fluids on aircraft aerodynamics - The testing for aerodynamic acceptability of fluids for SAE and regulatory qualification performed in accordance with AS5900> NOTE: This document is applicable for fluids that are “qualified” to (i.e., have passed) the tests and other standards prescribed in AMS1424 or AMS1428 and are properly used in accordance with ARP4737.
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