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Viewing 1 to 30 of 4289
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
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 in adopted in one 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. The global model include cylinder head, block, turbocharger, and catalyst components.
2017-09-19
Technical Paper
2017-01-2133
Donald Jasurda
The purpose of this paper is to demonstrate how advanced QMS systems, once the purview of large aerospace OEM’s, are now accessible to the small and medium supplier market through the Cloud. This is important, as these systems have proven track records of improving visibility in manufacturing and decreasing non-conformance errors that cause expensive defects. This, in turn, creates cost reductions that can be passed up the supply chain. Utilizing effective quality systems to manage manufacturing processes is a large feat. It often includes expensive IT costs for setting up servers, configuring systems, creating internal processes and then managing the enormous amounts of data that are fed into it. Historically, these systems are cost prohibitive for aerospace suppliers and small to medium sized businesses. Now, with the rise of Cloud-Based Software, QMS systems are available at a fraction of the cost.
2017-09-04
Technical Paper
2017-24-0127
Lauretta Rubino, Dominic Thier, Torsten Schumann, Stefan Guettler, Gerald Russ
With the increasing number of engines utilizing direct fuel injection and the upcoming more stringent emission legislation, regulating not only particulate mass (PM) but particulate number (PN), emissions of Direct Injection Spark Ignition Engines (DISI) are becoming of increasing concern. Gasoline Particle Filters (GPF) represent a novel potential measure to reduce particle number emissions from DISI engines and are particularly effective in view of the tight particle number limits requirements at cold start and over RDE. Even if some learning from the development and application of particulate filters to diesel engines can be transferred to gasoline engines, the particulate consistence, the mass to number ratio and the temperature as well as the gas composition of gasoline engines are significant different to diesel engines. Therefore, there is the need to study the application of particulate filters to gasoline engines carefully.
2017-07-17
Article
Virtual-reality innovations are emerging as crucial new weapons to enhance - and abbreviate - the automotive product-development process.
CURRENT
2017-07-12
Standard
AIR5451A
The landing gear system is a major and safety critical airframe system that needs to be integrated efficiently to meet the overall aircraft program goals of minimizing the penalties of weight, cost, dispatch reliability and maintenance. As the landing gear system business develops and large-scale teaming arrangements and acquisitions become increasingly common, it may be desirable in some instances to procure an Integrated Landing Gear System. This document provides guidelines and useful references for developing an integrated landing gear system for an aircraft. The document structure is divided into four sections: • Landing Gear System Configuration Requirements (Section 3) • Landing Gear System Functional Requirements (Section 4) • Landing Gear System Integrity Requirements (Section 5) • Landing Gear System Program Requirements (Section 6) The landing gear system encompasses all landing gear structural and subsystem elements.
CURRENT
2017-07-11
Standard
AS6449C
This document establishes the requirements for a dry film lubricant AS6449 lubricant for use on breathing oxygen system and potable water system components, for a temperature range of -90 to +300 °F. This document also establishes the Non-Destructive Test (NDT) procedures and criteria for coated production parts. This document requires qualified products and product applicators.
2017-07-11
WIP Standard
AMS2399B
This specification covers the engineering requirements for electroless deposition of nickel-boron on various materials and the properties of the deposit.
CURRENT
2017-07-11
Standard
AMS2631E
This specification covers the procedure for ultrasonic inspection of wrought titanium and titanium alloy products 0.25 inch (6.4 mm) and over in cross-section (thickness) or diameter.
2017-07-10
Technical Paper
2017-28-1930
Anil Kumar Jaswal, Pradeep Chandrasekaran, Surendran Ramadoss
Abstract Indian Automobile Industry has started using Six Sigma for Vehicle Design and process improvement to compete with Global competition. This Paper describes how the Tools of Six Sigma shall be used as an Effective Tool for both redefining the Design and the Process Improvement. This Paper talks on the evolution of DMADV approach in Indian Automobile Industry compared to the related Trends in Other Manufacturing Sectors. The Author describes how the warranty failures in Commercial Segment Vehicle Category which was the selling talk for the Competition was addressed in Leading Indian Automobile OEM. As this Failure was adversely impacting customer satisfaction and no solution seemed forthcoming, top Management indicated to use a radically different approach to solve the problem within a years’ time.
CURRENT
2017-07-10
Standard
AMS2375E
This specification covers procedures for obtaining first article (preproduction) approval of forgings and the controls to be exercised in producing subsequent production forgings.
2017-07-07
Article
The 418th Flight Test Squadron at Edwards Air Force Base is currently assessing a new parachute for the Advanced Concept Ejection Seat II that will improve safety and expand the acceptable personal weight range of aircrew.
2017-07-06
WIP 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.
2017-07-02
Article
On June 28, 2017, days ahead of the July 2017 U.S. Air Force light attack aircraft experiment, the Senate Armed Services Committee passed a preliminary vote for a proposed annual defense budget that included $1.2 billion for “a fleet of Light Attack/Observation aircraft.”
2017-06-30
Article
Advances in engineering knowledge and CAE led to Achates Power's transformative engine design.
2017-06-27
Article
Recently NASA researchers were officially cleared to begin formal feasibility studies on advanced Unmanned Aircraft System (UAS) concepts under NASA’s Convergent Aeronautics Solutions (CAS) project. The investigations, three in total, are expected to take between 24 and 30 months to complete.
2017-06-27
Article
The new vehicle test center in Auburn Hills, MI, will feature a chassis dyno for emissions testing, powertrain development programs and benchmarking.
CURRENT
2017-06-21
Standard
ARP9009A
This SAE Aerospace Recommended Practice (ARP) specifies for quality requirements that are additive to a procurement document or contract, where an organization: a. needs to provide additional guidance for suppliers and other organizations in the delivery of products, goods and services in accordance with stated quality demands, and b. needs to provide information in addition or in absence of existing quality system requirements to provide the assurance of conformity to customer and applicable regulatory requirements. NOTE: In this ARP, the term ‘product’ applies only to the product intended for, or required by, a customer.
CURRENT
2017-06-21
Standard
AMS2249H
This specification defines limits of variation for determining acceptability of the composition of cast or wrought titanium and titanium alloy parts and material acquired from a producer.
2017-06-16
Article
Soon, new vehicles will be able to communicate back and forth with each other and with traffic signals.
2017-06-16
Article
In a production vehicle that Tula tested, conventional operation yielded what was termed an “objectionable” audible boom at 47 Hz with production calibration. However, under DSF operation all firing patterns resulting in frequencies between 44 Hz and 48 Hz were avoided.
CURRENT
2017-06-16
Standard
AMS2380G
This specification covers the procedures for approval of products of premium-quality titanium alloys and the controls to be exercised in producing such products.
2017-06-13
Article
Low Speed Pre Ignition (LSPI) is an abnormal combustion event with the potential to cause catastrophic damage to pistons and other components in downsized engines.
2017-06-13
WIP Standard
J2932
This document provides test performance requirements for air disc brake actuators for service and combination service parking brake actuators with respect to function, durability and environmental performance when tested according to SAE J2902.
CURRENT
2017-06-12
Standard
AS7106/3A
This document has been declared "CANCELLED" as of June 2017. By this action, this document will remain listed in the Numerical Section of the Aerospace Standards Index. Cancelled specifications are available from SAE.
CURRENT
2017-06-12
Standard
AS7106A
This document has been declared "CANCELLED" as of June 2017. By this action, this document will remain listed in the Numerical Section of the Aerospace Standards Index. Cancelled specifications are available from SAE.
2017-06-05
Technical Paper
2017-01-1857
Joshua R. Goossens, William Mars, Guy Smith, Paul Heil, Scott Braddock, Jeanette Pilarski
Abstract Fatigue life prediction of elastomer NVH suspension products has become an operating norm for OEMs and suppliers during the product quoting process and subsequent technical reviews. This paper reviews a critical plane analysis based fatigue simulation methodology for a front lower control arm. Filled natural rubber behaviors were measured and defined for the analysis, including: stress-strain, fatigue crack growth, strain crystallization, fatigue threshold and initial crack precursor size. A series of four distinct single and dual axis bench durability tests were derived from OEM block cycle specifications, and run to end-of-life as determined via a stiffness loss criterion. The tested parts were then sectioned in order to compare developed failure modes with predicted locations of crack initiation. In all cases, failure mode was accurately predicted by the simulation, and predicted fatigue life preceded actual end-of-life by not more than a factor of 1.4 in life.
2017-05-20
Book
Rani Elhajjar
Additive Manufacturing of Aerospace Composite Structures: Fabrication and Reliability introduces the reader to the current state of technologies involved in processing and design of polymer-reinforced fiber composites using additive manufacturing’s automated fiber placement methods, through ten seminal SAE International papers. Currently, the material layup strategy in terms of process selection and manufacturability is usually not prioritized in the design phase. Engineers do not have a good way to see how their design choices can affect the manufacturing process beyond their initial structural-level considerations. The result is typically a large amount of experimental testing necessary to qualify the materials and structures typified in the classical building-block approach. Such an environment makes mistakes difficult to solve and, should redesign be required, obtaining reliable information is hard to piece together.
CURRENT
2017-05-19
Standard
AMS2355M
This specification covers quality assurance sampling and testing procedures used to determine conformance to applicable specification requirements of wrought aluminum alloy and wrought magnesium alloy mill products (except forging stock), and includes quality assurance and testing procedures for rolled, forged, and flash welded rings (see 8.3). Requirements are specified in inch/pound units.
2017-05-18
Article
PCB Piezotronics, Inc.’s family of miniature triaxial ICP accelerometers, Models 356A43, 356A44 and 356A45, are small (0.4 x 0.4 x 0.75 in/10.2 x 10.2 x 19.05 mm), lightweight (4.2 g/0.15 oz) and TEDS (Transducer Electronic Data Sheets) IEEE 1451.4 enabled.
2017-05-18
Journal Article
2017-01-9681
Mohamed El Morsy, Gabriela Achtenova
Abstract Bearing and gear condition monitoring are important to improve a mechanical system reliability and performance. In the early stage of bearing failures, the Bearing Characteristic Frequencies (BCFs) contain very little energy and are often overwhelmed by noise and higher-level macro-structural vibrations, an effective signal processing method would be necessary to eliminate such corrupting noise and interference. Referring to the non-stationary characteristics of roller bearing fault vibration signals, a roller bearing condition monitoring method based on Envelope Process to raw time-domain vibration signal and Autocorrelation enhancement to the residual signal is put forward in this paper. The concept of Envelope and Autocorrelation techniques and its implementation for defect identification are discussed. Also, distinction of bearing fault signal as cyclostationary from periodic signal for gear fault.
Viewing 1 to 30 of 4289

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