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2017-01-10
Technical Paper
2017-26-0170
Pratik Pillai, Sivakumar Venugopal, Vijaysankar Gopalan
Crevice Corrosion is one of the most damaging forms of material degradation. Crevice corrosion occurs when a wetted metallic surface is in close proximity to another surface. Almost in any engineered layout there are many instances in which two or more materials are, by design, in close proximity. The primary means of preventing crevice corrosion is careful design. Unfortunately, in most engineering layouts complete avoidance of crevices is not practical. In this study, the corrosion analysis consisted of parts like cast aluminium nipple and a rubber hose clamped over it which were part of the coolant circuit joint of an automobile engine. There was coolant leakage from the joint and bulging of the rubber hose attached to it. A number of failed aluminium nipples were studied for various metallurgical aspects like chemistry, hardness and microstructure and the results were found to be within acceptable limits.
2017-01-10
Technical Paper
2017-26-0051
Praveen Babu Kandavalli, Ramanathan Karthi, Suresh Suresh Kumar, M Anand
Lubrication system is a critical factor for engine health. But it creates parasitic load and increased fuel consumption of the engine. The oil demand of an engine depends on engine speed, load, bearing clearances, operating temperature and engine's state of wear. Ideally, the oil pump should adapt the delivery volume flow to actual engine oil demand and should avoid unnecessary pumping of oil which causes increased power and fuel consumption. However in a conventional mechanical oil pump, there is no control on the oil flow and it is purely a function of operating speed. A variable discharge oil pump (VDOP) is an approach to reduce the parasitic losses wherein the oil flow is regulated based on the mechanical needs of the engine. This study is based on the results of a two stage VDOP installed on a 1.2L 3 cylinder MPFI engine. The oil supply is regulated by a solenoid control which receives command from Engine control Unit (ECU). The study was done in two stages.
2017-01-10
Journal Article
2017-26-0233
Solairaj Perumal, Abhay Kumar, Arun Mahajan, Dinesh Redkar, Sureshkumar Balakrishnan
The tractor engine related mounting brackets are very critical due to different aspects of vehicle performance, durability and noise. These mounting bracket have been designed as a framework to support engine external parts like muffler, exhaust tail pipe, fuel filter, alternator etc. Vibration and fatigue has been continuously a concern which may lead to structural failure and performance issues. Various such failures are faced regularly by automotive industry and finite element based analysis are used to resolve them. The resolution is done by playing with the component thicknesses, material, by providing additional support etc. However, due to large degree of uncertainty associated with the loading, boundary conditions, manufacturing, environmental effects; still there is some probability of failure. This paper focuses on a field failure issue of an exhaust system of a tractor and subsequent concern resolution.
2016-12-02
WIP Standard
AS4726A
This specification establishes the requirements for self-locking nuts, wrenching type (i.e., hexagon, double hexagon, and spline drive), made of a corrosion and heat resistant steel of the type identified under the Unified Numbering System as UNS S66286. Classification: a. 220 ksi minimum tensile strength at room temperature and b. 850 degrees F maximum test temperature of parts. Primarily for use in aerospace propulsion systems in temperatures up to approximately 850 degrees were nuts are used with bolts capable of developing 220 ksi axial tensile strength at room temperature, and having UNJ thread form.
2016-12-01
WIP Standard
AMS3400
This fluid has been used typically to evaluate the ability of elastomeric and other polymeric compounds to conform to designated requirements after immersion in the fluid at a specific temperature and time, as required by an applicable specification, and its use is limited to such applications. This fluid is not intended for operational use in hydraulic systems. Each application should be considered separately.
2016-12-01
WIP Standard
ARP5429A
This SAE Aerospace Recommended Practice (ARP) applies to fatigue testing of landing gear and landing gear components.
2016-12-01
WIP Standard
AS81714/10A
Scope not available.
2016-11-30
WIP Standard
AS5355/2B
During the revision of AS5355/1, /2 and /3 Revision A the "B" dimension was incorrectly located and will be revised.
2016-11-30
WIP Standard
AS5355/3B
During the revision of AS5355/1, /2 and /3 Revision A the "B" dimension was incorrectly located and will be revised.
CURRENT
2016-11-29
Standard
AS5877B
This SAE Aerospace Standard (AS) prescribes requirements for the various types of nozzles that are used for the refueling and defueling of aircraft fitted with pressure fuel servicing systems. It is to be used as a replacement for MIL-N-5877, MS29520 and for all commercial applications.
CURRENT
2016-11-28
Standard
AMS4174E
This specification covers an aluminum alloy in the form of flash welded rings 0.062 to 4.499 inches, incl (1.57 to 114.27 mm incl) in radial thickness, with cross sectional areas up to 32 in2 (206 cm2) (see 8.5).
CURRENT
2016-11-28
Standard
AS21924D
SCOPE IS UNAVAILABLE.
CURRENT
2016-11-28
Standard
J891_201611
Included herein are complete general and dimensional specifications for metric and inch types of spring nuts recognized as SAE standard. These nuts are intended for general use where the engagement of a single thread on the mating screw is considered adequate for the application. It should be noted that spring nuts having other configurations, dimensions, provisions for ground, etc., are available and manufacturers should be consulted.
2016-11-28
WIP Standard
J1939DA
This document is intended to supplement the J1939 documents by offering the J1939 information in a form that can be sorted and search for easier use. The J1939 Digital Annex, introduced in August 2013, offers key J1939 technical data in an Electronic Spreadsheet that can be easily searched, sorted, and adapted to other formats. J1939DA contains all of the SPNs (parameters), PGNs (messages), and other J1939 data previously published in the SAE J1939 top level document. J1939DA also contains all of the SLOTs, Manufacturer ID Codes, NAME Functions, and Preferred Addresses previously published in the SAE J1939 top level and the J1939-71 document. J1939DA contains the complete technical details for all of the SPNs and PGNs previously published in the SAE J1939-71 document. It also includes the supporting descriptions and figures previously published in the SAE J1939-71 document.
CURRENT
2016-11-23
Standard
J492_201611
This is a guide intended to aid the user in the proper selection and application of rivets as a fastening means. It consists of general information on the advantages of riveting, various methods of riveting, selection of rivets and design considerations.
CURRENT
2016-11-23
Standard
J892_201611
Included herein are general, dimensional, and performance specifications for those types, styles, and sizes of steel stamped Push-On Spring Nuts recognized as SAE standard. These nuts are intended for general use where the engagement on the mating metal or plastic studs and in some cases screw or bolt threads is considered adequate for the fastening joint application. It should be noted that Push-On Spring Nuts having other characteristics and configurations are available and manufacturers should be consulted. For the metric equivalent of this document, see SAE J892M.
CURRENT
2016-11-23
Standard
AIR4069C
This SAE Aerospace Information Report (AIR) presents preferred design, assembly, and repair practices for sealing of aircraft integral fuel tanks, including rework of applied fuel tank seals. It addresses engineering designs for integral fuel tanks as they are currently found in practice; and discusses the most practical and conservative methods for producing a reliable, sealed system. Although this AIR presents practices for sealing of integral fuel tanks, the practices presented within this report are practices that are carried throughout sealing that include both pressure and environmental aircraft sealing. Design preferences for optimum sealing are not within the scope of this document. Such discussions can be found in the United States Air Force (USAF) sponsored report, entitled Aircraft Integral Fuel Tank Design Handbook, AFWAL-TR-87-3078.
2016-11-23
WIP Standard
AS407E
To specify minimum requirements for Fuel Flowmeters for use primarily in reciprocating engine powered civil transport aircraft, the operation of which may subject the instruments to the environmental conditions specified in Section 3.3. This Aeronautical Standard covers two basic types of instruments, or combinations thereof, intended for use in indicating fuel consumption of aircraft engines as follows: TYPE I - Measure rate of flow of fuel used. TYPE II - Totalize amount of fuel consumed or remaining.
2016-11-22
WIP Standard
J2271
This SAE Parts Standard provides dimensional and quality assurance requirements for 1/4 through 2 in sizes of studs in the following configurations in standard materials used for ship system applications: a. Continuous thread studs in UNRC and 8UNR series. b. Double end studs (clamping type) where both ends are of the same thread length (UNRC or 8UN). Also called bolt-studs. (These are suitable for mating with nuts or the set end may be installed with anaerobic thread locking compound.) c. Double end studs (interference thread type) with the nut end having UNRC or 8UNR series thread and where the tap end has NC 5 HFS interference fit thread forms. Also called a tap end stud. A complete metric companion to this document is provided in SAE J2271M, therefore no metric equivalents are presented. These studs are primarily or use in ship systems and equipment.
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