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Viewing 31 to 60 of 23393
2014-10-13
Technical Paper
2014-01-2840
Juan J. Hernández, Rosario Ballesteros, Javier Barba, José Guillén-Flores
Abstract In order to reduce the pollutant emissions (NOx and PM) of diesel engines, the addition of small gaseous fuel amounts or dual mode operation have been proved as potential techniques. This paper is focused on a detailed characterization of the particles emitted from a single cylinder diesel engine when part of the diesel fuel (5 to 20% by energy) is replaced by a gaseous fuel (producer gas, mainly composed by H2, CO, CH4 and inert compounds) coming from biomass steam gasification. The engine was run at constant speed and torque and different EGR rates. Particle samples were collected by means of fiber glass filters placed in a dilution mini-tunnel. Simultaneously, during tests, part of the exhaust gas was conducted to an SMPS to determine the particle size distribution. The filters were analyzed by using two different techniques: Thermogravimetric analysis (TGA) to obtain the volatile organic fraction (VOF) and the soot concentration, and Soxhlet extraction/High Performances Liquid Cromatography (HPLC) to speciate PAHs (Polycyclic Aromatic Hydrocarbons).
2014-10-08
Standard
ARP6200
This SAE Aerospace Recommended Practice (ARP) describes the recommended tests and their associated test means for commercial aircraft hydraulic systems at the system level that are required to demonstrate compliance with the 14 CFR Part 25 and EASA CS 25 airworthiness regulations, and to show that the required level of maturity at the aircraft entry into service (EIS) has been achieved.
2014-10-08
Standard
AS5127/1C
This SAE Aerospace Standard (AS) describes test methods to determine the application and performance properties of two-component sealing compounds. It shall be used in conjunction with AS5127 and the applicable material specification. When modifications to these test methods are called out in material specifications, the material specification shall take precedence.
2014-10-06
WIP Standard
AS955A
This SAE Aerospace Standard (AS) covers high strength thin wall (commercial) metric sockets, universal metric sockets, metric box wrenches and metric torque adaptors which possess the strength, clearances, and internal wrenching design so configured that, when mated with 12 point fasteners conforming to the requirement of ISO 4095, they shall transmit torque to the fastener without bearing on the outer 5% of the fastener's wrenching points. This standard provides additional requirements beyond ASME B107.100 and B107.5M appropriate for aerospace use. Inclusion of dimensional data in this document is not intended to imply that all of the products described herein are stock production sizes. Consumers are requested to consult with manufacturers concerning lists of stock production sizes. The dimensional limits of box and combination wrench lengths have been established to provide configuration control for tool storage applications.
2014-10-06
WIP Standard
J2188
This SAE Recommended Practice takes into account modern standardized methods for collecting and summarizing data that has an effect on vehicle steady-state performance, such as engine output (gross and net), transmission losses, drivetrain efficiency, vehicle aerodynamic devices for various vehicle and body configurations, as well as road surface variations and air density variations resulting from altitude and barometric effects. The procedure does not address vehicle transient performance (acceleration, braking, and cornering), because of the considerable amount of additional data required such as moment of inertia of all the rotating parts. Nor does it address vehicles with torque converters and automatic transmissions. This document is, therefore, intended for vehicles having fixed-ratio type transmissions and positive engagement clutches. Metric and ISO unit conversions are provided in the metric conversion tables at the end of this procedure (see Appendix B). Some modern vehicles with electronic engine controls have the ability to vary the maximum engine revolutions for each gear, as well as permitting the power or rpm to increase if more time is spent in the lower gears, as when climbing a grade.
2014-10-06
Standard
AS9102B
This standard establishes the baseline requirements for performing and documenting FAI. Should there be a conflict between the requirements of this standard and applicable statutory or regulatory requirements, the applicable statutory or regulatory requirements shall take precedence.
2014-10-02
Article
The U. S Department of Transportation/NHTSA Vehicle Research and Test Center has commissioned dSPACE to supply an in-lab GPS simulation system. GPS simulation is used in the development and testing of numerous intelligent driving and traffic systems, including collision avoidance, advanced driver-assistance systems, navigation, and V2X communications.
2014-10-02
WIP Standard
AS23053/1
This detail specification establishes the requirements for a range of similar electrical insulating sleevings that will shrink to a predetermined size upon the application of heat.
2014-10-02
WIP Standard
AS23053/11
This detail specification establishes the requirements for a range of similar electrical insulating sleevings that will shrink to a predetermined size upon the application of heat.
2014-10-02
WIP Standard
AS23053/10
This detail specification establishes the requirements for a type of electrical insulating sleeving that will shrink to a predetermined size upon the application of heat.
2014-10-02
WIP Standard
AS23053/12
This detail specification establishes the requirements for a range of similar electrical insulating sleevings that will shrink to a predetermined size upon the application of heat.
2014-10-02
WIP Standard
AS23053/13
This detail specification establishes the requirements for a type of electrical insulating sleeving that will shrink to a predetermined size upon the application of heat.
2014-10-02
WIP Standard
AS23053/15
This detail specification establishes the requirements for a range of similar electrical insulating sleevings that will shrink to a predetermined size upon the application of heat.
2014-10-02
WIP Standard
AS23053/18
This detail specification establishes the requirements for a range of similar electrical insulating sleevings that will shrink to a predetermined size upon the application of heat.
2014-10-02
WIP Standard
AS23053/14
This detail specification establishes the requirements for a type of electrical insulating sleeving that will shrink to a predetermined size upon the application of heat.
2014-10-02
WIP Standard
AS23053/16
This detail specification establishes the requirements for a type of electrical insulating sleeving that will shrink to a predetermined size upon the application of heat.
2014-10-02
WIP Standard
AS23053/8
This detail specification establishes the requirements for a type of electrical insulating sleeving that will shrink to a predetermined size upon the application of heat.
2014-10-02
WIP Standard
AS23053/6
This detail specification establishes the requirements for a range of similar electrical insulating sleevings that will shrink to a predetermined size upon the application of heat.
2014-10-02
WIP Standard
AS23053/7
This detail specification establishes the requirements for a range of similar electrical insulating sleevings that will shrink to a predetermined size upon the application of heat.
2014-10-02
WIP Standard
AS23053/4
This detail specification establishes the requirements for a range of similar electrical insulating sleevings that will shrink to a predetermined size upon the application of heat.
2014-10-02
WIP Standard
AS23053/5
This detail specification establishes the requirements for a range of similar electrical insulating sleevings that will shrink to a predetermined size upon the application of heat.
2014-10-01
Technical Paper
2014-01-9030
Sermet Yucel, Melinda Moran Lucking, Jon Magnuson, Germana Paterlini, Benjamin Worel
Fuel economy and performance vary significantly with the vehicle design and configuration, road profile, and payload. The variation is more pronounced for heavy-duty trucks and understanding its origin is critical to maximizing fleet profitability. In this paper we demonstrate a method to continuously estimate fuel consumption breakdown over resistive forces while the vehicle is driven on a public highway. The method is fast, cost-effective, and capable of analyzing trip segments as short as one second. The method utilizes a non-linear Kalman filter and a vehicle dynamical model that has a coupled longitudinal and vertical motion. The paper presents the breakdown of fuel consumption and an estimate of road grade profile obtained by driving a heavy-duty vehicle at the MnROAD research facility in Albertville MN. The road grade profile of the high-volume segment on Westbound Interstate 94 and the fuel consumption breakdown of the MnROAD heavy-duty test truck were estimated from recorded Control Area Network (CAN) signals and known vehicle parameters.
2014-09-30
Article
The Model T261 series rotary transformer coupled torque sensors from SensorData Technologies meet the demanding in-line testing requirements of small motors, pumps, compressors, turbines, fans, and other fractional horsepower rated devices.
2014-09-30
WIP Standard
AS81936/3
This SAE Aerospace Standard will cover airframe plain spherical bearings ustilizing a Copper Nickel Tin ball and a Corrosion Resistant Steel outer race for use between -65F and+350F.
2014-09-30
WIP Standard
AIR6334
This SAE Aerospace Information Report (AIR) examines the need for and the application of a power train usage metric that can be used to more accurately determine the TBO for helicopter transmissions. It provides a formula for the translation of the recorded torque history into mechanical usage. It provides examples of this process and recommends a way forward. This document of the SAE HM-1 IVHM Committee is not intended as a legal document and does not provide detailed implementation steps, but does address general implementation concerns and potential benefits.
2014-09-30
WIP Standard
AS81936/4
This SAE Aerospace Standard will cover airframe plain spherical bearings ustilizing a Copper Nickel Tin ball and a Corrosion Resistant Steel outer race for use between -65F and+350F.
2014-09-30
Technical Paper
2014-01-2306
Mathialagan Balaji, Hemant Bhatkar, Jeya Kumar Ranjith Kumar, Ananthan Anbazhagan, Pramod Palkar
Abstract Rear axles are subjected to bending and torsion loads out of which Bending loads are predominant. In case of Off road vehicles Bi Axial- combination of Bending and torsion loads were predominant, because of axle construction and vehicle usage pattern. Defined test procedures are available for bending durability and torsional durability evaluation of axles. In this experiment, new test methodology was developed for Bi Axial durability evaluation of Off road vehicle rear axle with single servo hydraulic linear actuator. For creating Bi Axial load condition, we may need multiple actuators and complicated fixtures. Axle wheel end is constrained at an angle with suitable fixtures for creating the bending and torsional forces together in the axle. Servo hydraulic linear actuator with suitable loading arm is used for applying the test torque in the axle input flange. Vehicle parameters like Engine torque, wheel reaction, axle ratio and wheel static loaded radius (SLR) etc., used for arriving the test specification.
2014-09-30
Standard
J2932_201409
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.
2014-09-30
WIP Standard
AMSSTD2154B
The purpose of this military standard is to provide uniform methods for the ultrasonic inspection of wrought metals and wrought metal products.
2014-09-30
Technical Paper
2014-01-2445
Shaoyun Sun, Yin-ping Chang, Qiang Fu, Jing Zhao, Long Ma, Shijie Fan, Bo Li, Andrea Shestopalov, Paul Stewart, Heinz Friz
Abstract In the development of an FAW SUV, one of the goals is to achieve a state of the art drag level. In order to achieve such an aggressive target, feedback from aerodynamics has to be included in the early stage of the design decision process. The aerodynamic performance evaluation and improvement is mostly based on CFD simulation in combination with some wind tunnel testing for verification of the simulation results. As a first step in this process, a fully detailed simulation model is built. The styling surface is combined with engine room and underbody detailed geometry from a similar size existing vehicle. From a detailed analysis of the flow field potential areas for improvement are identified and five design parameters for modifying overall shape features of the upper body are derived. In a second step, a response surface method involving design of experiments and adaptive sampling techniques are applied for characterizing the effects of the design changes. The characterization is followed by an optimization step to find the best possible drag improvement from these design changes.
Viewing 31 to 60 of 23393

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