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Putting lightweighting to the test

Material laws and orientation information are coupled in a single finite element analysis to predict the performance of the hybrid composite beam under a dynamic three point bending load.

Glossary of Terms Related to Fluid Filters and Filter Testing

Over the years during which fluid filtration systems have been developing, many terms have come into use for descriptions of characteristics of filter media, filter assemblies, test methods, and test materials. Inevitably, some terms have been applied loosely, so that the same term may have different meaning to different people, or in different frames of reference. Recognizing the need for clearly defined terms, which can have only one meaning for all persons in all circumstances, so that documents dealing with standard methods of evaluation of filters will have only one interpretation, the Filter Test Methods Subcommittee of the SAE Engine Committee has compiled this Glossary of related terms. No attempt has been made to produce an all-inclusive document, containing definitions of all terms related to all types of fluid filters. Instead, the Glossary is confined to the terms likely to be encountered in relation to filters for lubricating oil and fuels.

A Mid-Infrared Laser Absorption Sensor for Gas Temperature and Carbon Monoxide Mole Fraction Measurements at 15 kHz in Engine-Out Gasoline Vehicle Exhaust

Quantifying exhaust gas composition and temperature in vehicles with internal combustion engines (ICEs) during transient engine operation, particularly cold starts, is crucial for understanding and implementing emission reduction strategies. However, commercially available gas analyzers and temperature sensors are too slow to measure these gas conditions on the timescale of individual cylinder firing events and they often employ extractive sampling methods. To address these limitations, a two-color mid-infrared (MIR) laser absorption spectroscopy (LAS) sensor for in-situ measurements of gas temperature and carbon monoxide (CO) mole fraction at a rate of 15 kHz was developed. The LAS sensor utilizes two fiber-coupled quantum-cascade lasers (QCLs) that were time-multiplexed to enable in-situ measurements of temperature and CO mole fraction at 15 kHz in the engine-out exhaust of an 8-cylinder gasoline ICE research vehicle.

Performance Testing for Aerospace and High Performance Electronic Interconnects Containing Pb-free Solder and Finishes


This document defines: (1) A default method for those companies that require a pre-defined approach and (2) A protocol for those companies that wish to develop their own test methods.

The default method is intended for use by electronic equipment manufacturers, repair facilities, or programs which, for a variety of reasons, may be unable to develop methods specific to their own products and applications. It is to be used when little or no other information is available to define, conduct, and interpret results from reliability, qualification, or other tests for electronic equipment containing Pb-free solder. The default method is intended to be conservative, i.e., it is biased toward minimizing the risk to users of AHP electronic equipment.


Truck Tech War!

Ford, GM, and Ram arm their profit-pumping half-ton pickups for the 2020s’ efficiency battle.

Focus on alternative powertrain technologies for ICPC 2015

Dr.-Ing. Marko Dekena, Executive Vice President, Global Business Development, Sales and International Operations Powertrain Systems, AVL, recently spoke with SAE Off-Highway Engineering about some of the strategic and technical issues likely to be discussed at this year’s event.

Advanced Ducted Propulsor In-Flight Thrust Determination

The emerging ultra high bypass ratio ADP engines, with nozzle pressure ratios significantly lower, and bypass ratios significantly higher, than those of the current turbofan engines, may present new in-flight thrust determination challenges that are not specifically covered in AIR1703. This document addresses candidate methods and the additional challenges to the thrust determination for these ADP engines. These novel challenges result in part from the fact that some large ADP engines exceed present altitude test facility capabilities. The traditional methods of nozzle coefficient extrapolation may not be most satisfactory because of the increased error due to the ADP higher ratio of gross to net thrust, and because of the increased sensitivity of in-flight thrust uncertainty at the lower fan nozzle pressure ratio.