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Viewing 1 to 30 of 4310
2017-10-08
Technical Paper
2017-01-2432
Xiangwang Li, Weimin Wang, Xiongcai Zou, Zhiming Zhang, Wenlong Zhang, Shemin Zhang, Tao Chen, Yuhuang Cao, Yuanda Chen
Abstract In order to reduce emissions, size and manufacturing cost, integrated exhaust manifold become popular in gasoline engine, especially in three-cylinder engine. Moreover, due to shorter length, lighter weight, and less component connections, the exhaust manifold and hot end durability will improve apparently. In this work, an advanced cylinder head with integrated exhaust manifold is adopted in a three-cylinder turbo engine. Because of this integration characteristic, the gas retain in cylinder head longer and the temperature reach higher level than normal cylinder head, which will cause thermal fatigue failure more easily. To validate the exhaust manifold and hot end durability, series simulation and test validation work have been done. Firstly, overall steady state and transient temperature simulation was done for global model. For turbocharger, in order to simulate the outlet turbulent flow and 3d rotation, a code was compiled to define this 3d rotation.
2017-09-20
WIP Standard
AMS2628B
This specification covers procedures for ultrasonic immersion inspection of premium grade wrought titanium and titanium alloy round billet 5.0 inches (127 mm) and over in nominal diameter. This inspection procedure has been used typically for locating internal defects such as cracks, voids, inclusions, and other structural discontinuities which may or may not be exposed to the surface in billets, but usage is not limited to such applications. Testing normally will be by longitudinal procedure, but shear wave procedure may be added when agreed upon by purchaser and vendor. This specification includes zoned inspection and digital data acquisition.
CURRENT
2017-09-20
Standard
ARP1575C
This document describes a hand-applied, nontank, phosphoric acid anodizing process for surface preparation of aluminum alloys required to achieve optimum bondline durability for structural adhesive bonding.
CURRENT
2017-09-20
Standard
ARP4252B
This Aerospace Recommended Practice is intended as a guide toward standard practices for the determination of surface cleanliness that are applicable to field operation. Some of these methods can also be used to determine quality assurance that a surface has been properly prepared and maintained. The instrumental methods are: Wettabaility, Surface Potential Difference (SPD), Ellipsometry, and Optically Stimulated Electron Emission (OSEE). Each instrument is described with respect to measurement techniques, limitations, and advantages and types of available instruments. Elementary theoretical prinicples and examples of the use of each instrument are also given.
CURRENT
2017-09-19
Standard
AMS2451/6B
This specification establishes the requirements for brush plating of copper by electrodeposition.
CURRENT
2017-09-19
Standard
AMS2690D
This specification defines the equipment, procedures, and requirements for joining leads by parallel gap resistance welding. For attaching leads by parallel gap resistance welding in the assembly of microelectronic circuitry to thin film substrates.
2017-09-19
Technical Paper
2017-01-2125
Mohammad Barkat, Vivek Karan, Pradeep N
Abstract The exponential increase in the number of aircrafts and air travelers has triggered new innovations which aim to make airline services more reliable and consumer friendly. Quick and efficient maintenance actions with minimum downtime are the need of the hour. Areas that have a large potential for improvement in this regard are the real time use of diagnostic data, filtering/elimination of nuisance faults and machine learning capabilities with respect to maintenance actions. Although, numerous LRUs installed on the aircraft generate massive amounts of diagnostic data to detect any possible issue or LRU failure, it is seldom used in real time. The turnaround time for LRU maintenance can be greatly reduced if the results of the diagnostics conducted during LRU normal operation is relayed to ground stations in real-time. This enables the maintenance engineers to plan ahead and initiate maintenance actions well before the aircraft lands and becomes available for maintenance.
2017-09-17
Technical Paper
2017-01-2506
Saikiran Divakaruni, HT Chang
Abstract Friction material back plate design, manufacturing and consistent quality are some of the key attributes for better brake performance. Historically, the auto industry’s focus on back plate quality has been limited to drawing dimensions. Recently, vehicle manufacturers across the globe are tightening caliper performance criteria to achieve near zero drag for fuel consumption regulations and improved NVH to attract end customers. To meet these new stringent requirements, friction and back plate suppliers need to focus, in more detail, on how to improve the backing plate quality and better understand the interface characteristics of back plate/pad assembly to caliper performance. While many key characteristics of the back plate were identified in past assembly design process, there has been vague understanding to connect with caliper performance, thus, the definition of back plate quality has been limited to basic dimensional measurement.
2017-09-13
Article
Ford and Virginia Tech Transportation Institute are testing a Ford-designed method for self-driving vehicles to signal their "intent" to pedestrians; the research is hoped to help develop common standards for such communication.
2017-09-06
Article
The Yokogawa DL350 ScopeCorder is a compact, fully portable measuring instrument available for capturing, displaying, recording and analyzing a wide variety of electrical and physical parameters in industry sectors including automotive, electronics, energy, transport and mechatronics.
2017-09-06
Article
The MTEK Subsystem (Marvin Test Expansion Kit) from Marvin Test Solutions (MTS), Inc. adds test capabilities to legacy semiconductor test systems that lack the ability to meet the test requirements of current devices.
CURRENT
2017-09-05
Standard
AS13001A
This standard establishes the common requirements for training of DPRV personnel for use at all levels of the aerospace engine supply chain. This standard shall apply when an organization elects to delegate product release verification by contractual flow down to its suppliers (reference 9100 and 9110 standards) and to perform product acceptance on its behalf. It is intended that organizations specify their DPRV requirements through the application of AS9117. While the delegating organization will use the AS13001 standard as the baseline for establishing DPRV process and product training, it may include additional contractual training requirements to meet its specific needs. The DPRV training material was primarily developed for aerospace engine supply chain requirements however this standard may also be used in other aerospace industry sectors where a DPRV process requiring specific training can be of benefit.
2017-09-04
Technical Paper
2017-24-0127
Lauretta Rubino, Dominic Thier, Torsten Schumann, Stefan Guettler, Gerald Russ
Abstract With the increased use of engines utilizing direct fuel injection and the upcoming introduction of more stringent emissions legislation that regulates not only particulate mass (PM) but also particulate number (PN), the emissions from Direct Injection Spark Ignition Engines (DISI) are an increasing concern. Gasoline Particle Filters (GPF) represent a potential way to reduce particle number emissions from DISI engines and are particularly effective considering the tough performance requirements during cold start and over RDE operation. Even though some learning from the development and application of particulate filters to diesel engines can be transferred to gasoline engines, the particle composition, mass to number ratio as well as the exhaust gas temperature and composition from gasoline engines are significantly different to diesel engines. Therefore, there is the need to study the application of particulate filters to gasoline engines in more depth.
CURRENT
2017-08-31
Standard
ARP1616B
This document defines design, performance, and test criteria for self-sealing breakaway valves for use in crash-resistant aircraft fuel systems.
CURRENT
2017-08-29
Standard
AS6332
How to Purchase Global Anti-Icing and De-Icing Standards
CURRENT
2017-08-28
Standard
AS13004
This standard defines requirements for the identification, assessment, mitigation, and prevention of risk in the manufacturing process through the application of Process Flow Diagrams (PFDs), Process Failure Mode and Effects Analysis (PFMEA) and Control Plans throughout the life cycle of a product. This standard aligns and collaborates with the requirements of AS9100, AS9102, AS9103, and AS9145. The requirements specified in this standard apply in conjunction with and are not alternative to contractual and applicable statutory and regulatory requirements. In case of conflict between the requirements of this standard and applicable statutory or regulatory requirements, the latter shall take precedence.
2017-08-27
Article
Engineered Propulsion Systems (EPS) Graflite V8 4.3-L, four-stroke engine is rated at 320 to 420 hp. It is expected to go into production in 2018.
2017-08-24
Magazine
On-Orbit Satellite Refueling Flow Measurement The Path from Concept to Operational Status Radiation Tolerant "Smart Backplanes" for Spacecraft Avionics Using Heat Pipes to Cool Embedded Computers Electronically Dimmable Aircraft Windows How do you block the light of the sun? Eliminating Electrical Arcing in Satellite Systems NASA Miniaturizes Century-Old Radio Sounder Technology Developing an Airborne Optical Systems Testbed (AOSTB) New Class of Excimer-Pumped Atomic Lasers (XPALS) Research demonstrates the viability of an atomic laser having a quantum efficiency greater than one. Hydrodynamic Drag Force Measurement of a Functionalized Surface Exhibiting Superhydrophobic Properties Comparing the skin friction drag effects of a superhydrophobic flat plate to an untreated flat plate of the same material and geometry.
2017-08-22
Article
Dr. Rolf Bulander makes a robust case for diesel's future potential, while AE experiences a Real World Driving Emissions test run.
2017-08-22
WIP Standard
AMS2762C
This specification covers the procedure for carburizing and related heat treatments of carbon and low-alloy steel parts to produce case hardening and specified mechanical properties within the capability of each respective steel.
2017-08-22
WIP Standard
J2357
This SAE Recommended Practice is intended as a guide toward standard practice and is subject to change to keep pace with experience and technical advances. This document establishes performance requirements, design requirements and design guidelines for electronic devices.
2017-08-21
Article
The Institute for Advanced Automotive Propulsion Systems is scheduled to open in early 2020. Two University of Bath professors discuss the details.
2017-08-21
WIP Standard
AMS2685F
This specification defines the requirements for joining metals and alloys using the gas-tungsten-arc welding (GTAW) methods.
2017-08-18
WIP Standard
AMS2474E
This specification establishes the engineering requirements for producing chemical-film coatings on aluminum and aluminum alloys and the properties of such coatings. Primarily for aluminum and aluminum alloys where increased corrosion resistance, improved paint adhesion, or a low-electrical resistance coating is required. Also useful for improving the corrosion resistance and paint adhesion properties of abraded or discontinuous anodized surfaces of aluminum and aluminum alloy parts.
2017-08-18
WIP Standard
AMS2804D
This specification covers requirements for identification of castings.
CURRENT
2017-08-14
Standard
AMS2376E
This specification covers procedures for approval of premium quality forgings, usually serialized, the stock from which such forgings are produced, and the controls to be exercised in producing the forgings and forging stock.
2017-08-12
Article
Eaton manufactured engine-driven pumps for the first flying MC-21 prototype and supplied additional system sub-components including thermal bypass valves, while Pratt & Whitney supplied its PW1000G GTF engine and Rockwell Collins, Honeywell, and Elbit supplies various avionics systems.
2017-08-12
Article
A Protonex and Insitu development team focused on packaging and integrating existing PEM fuel cell technology with the airframe. The resulting design comprised a redundant double stack design that produces 1.2 kW of power.
CURRENT
2017-08-08
Standard
J1454_201708
This SAE Standard describes a laboratory test procedure for comparatively evaluating the durability and fatigue life qualities of a complete seat cushion by submitting the seating surface of the cushion to repetitive compressive and rotational loading with a simulated human buttocks.
2017-08-04
Article
A predatory dragonfly’s ability to detect, track and anticipate the escape maneuvers of a juicy target may provide a link to making autonomous driving safer, according to researchers.
Viewing 1 to 30 of 4310

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