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2015-09-06
Technical Paper
2015-24-2467
Alessandro Ferrari, Federica Paolicelli
The modal analysis of a Common Rail fuel injection system equipped with solenoid injectors of the latest generation has been performed in the frequency domain. A complete lumped parameter model of the high-pressure hydraulic circuit from the pump delivery to the injector nozzles has been realized and validated by comparison with the frequency modal values obtained by applying a peak-picking technique to the measured pressure time history. Three main modal motions have been identified in the considered injection apparatus and the possible resonances with the external forcing terms, i.e., pump delivered flow-rate, pressure control valve discharged flow-rate and flow-rates expelled by the solenoid injector, have been highlighted and discussed. Furthermore, a sensitivity analysis of the frequency domain performance to key geometrical features of the high-pressure system layout has been carried out.
2015-09-06
Technical Paper
2015-24-2462
Fabio Auriemma, Heiki Tiikoja
The acoustic impedance exerted by a new type of element for noise control, the Micro-Grooved Elements (MGEs), has been broadly studied in this paper. The MGEs are typically composed of at least two overlying layers presenting macroscopic slots and a number of micro-grooves at least on one of the contact surfaces. Similarly to the Micro-Perforated Elements (MPEs), the MGEs have been proved to provide effective dissipation of acoustic energy by the means of viscous losses taking place in the micro-channels. However, in contrast to the typical MPEs, the MGEs use the grooves, instead of the holes, which the air is forced to pass through. It results in more cost effective elements, which have been found to represent an adequate alternative for fibrous materials, typically present in silencer units. This study represents a refined investigation on the acoustic impedance of the MGEs, aiming to provide a general formulation, valid for different internal configurations.
2015-09-06
Technical Paper
2015-24-2472
Nikolaos Papadopoulos, Pavlos Aleiferis
The design of a Diesel injector is a key factor in achieving higher engine efficiency. The injector’s fuel atomisation characteristics are also critical for minimising toxic emissions such as unburnt Hydrocarbons (HC). However, when developing injection systems, the small dimensions of the nozzle render optical experimental investigations very challenging under realistic engine conditions. Therefore, Computational Fluid Dynamics (CFD) can be used instead. For the present work, transient, Volume Of Fluid (VOF), multiphase simulations of the flow inside and immediately downstream of a real-size multi-hole nozzle were performed, during and after the injection event with a small air chamber coupled to the injector downstream of the nozzle exit. A Reynolds Averaged Navier-Stokes (RANS) approach was used to account for turbulence. Grid dependency studies were performed with 200k–1.5M cells.
2015-06-30
Standard
J2441_201506
1.1 Form This SAE Standard covers the engineering requirements for peening surfaces of parts by impingement of metallic shot, glass beads, or ceramic shot. 1.2 Application To induce residual compressive stress in surface layers of parts, thereby increasing fatigue strength and resistance to stress-corrosion cracking.
2015-06-30
Standard
J2467_201506
The SAE Standard covers normalized electric resistance welded, cold-drawn, single-wall, SAE 1021 carbon steel pressure tubing intended for use as pressure lines and in other applications requiring tubing of a quality suitable for bending, flaring, forming, and brazing. The grade of material produced to this specification is higher in carbon content and manganese content than the grade of material specified in SAE J525 and is intended to service higher pressure applications than equivalent sizes of SAE J525. Due to the higher carbon and manganese content the forming characteristics of the finished tube are diminished versus the SAE J525 product. Special attention to the overall forming requirements of the finished assembly shall be taken into consideration when specifying material produced to this specification.  
2015-06-29
WIP Standard
ARP598D
This SAE Aerospace Recommended Practice (ARP) defines the materials, apparatus and procedure for sizing and counting of particulate contamination, 5 μm or greater, in hydraulic fluid samples by membrane filtration iwth microscopic counting. It is capable of counting particulate matter in samples withdrawn from fluid power systems as identified by the 12 classes of SAE AS 4059 or NAS 1638 and projected beyond these for the five standard ranges specified and can thus serve as the primary document to determine acceptability. It is also capable of revealing but not measuring evidence of abnormal amount of water, other fluids, fine particulate and other materials, especially fibers and metals. It is applicable to all military, civil, space vehicles and test equipment.
2015-06-29
WIP Standard
J1555
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 for non-collision-related causes only (warranty, scheduled maintenance, non-scheduled maintenance, etc.), and some for both causes. The scope of this document deals with only those operations that involve collision and comprehensive insurance loss repairs.
2015-06-28
Standard
AS28938A
SCOPE IS UNAVAILABLE.
2015-06-28
Standard
AS6121B
SCOPE IS UNAVAILABLE.
2015-06-26
WIP Standard
AS51990B
Scope is unavailable.
2015-06-22
WIP Standard
AS3565A
No scope available.
2015-06-22
WIP Standard
AS51992B
Scope unavailable.
2015-06-22
WIP Standard
AS51989B
Scope is unavailable.
2015-06-22
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.
Viewing 1 to 30 of 15491

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