Your Destination for Mobility Engineering Resources

Announcements for SAE Mobilus

Browse All

Recent SAE Edge™ Research Reports

Browse All 177

Recent Books

Browse All 721

Recently Published

Browse All
To address mechanical faults caused by abnormal engine valve clearance, this study investigates the extraction methods of vibration signal feature parameters. A six-cylinder diesel engine test bench was established to collect cylinder head vibration signals under varying rotational speeds, torque loads, and valve clearance conditions. Four time–domain parameters, including peak-to-peak values, rectified average values, standard deviations, and root mean square amplitude, were extracted alongside the energy distribution of frequency bands obtained through wavelet packet decomposition. The correlations between these parameters and valve clearance states were systematically analyzed. The results demonstrated that all parameters exhibited significant increasing trends with elevated rotational speeds, whereas torque variations exerted minimal influence. Abnormal valve clearance induces significant amplitude increases in time–domain parameters. The energy within frequency bands 5–8 (6–12 kHz
Ji, ShaoboDong, YimingYue, YuanhangPan, ChiLiao, GuoliangLu, Yueqi
This SAE lab test procedure should be used when performing the following specialized weathering tests for wheels; Florida Exposure, QUV, Xenon and Carbon Weatherometer. In addition to these procedures, some additional post-weathering tests may be specified. Please refer to customer specifications for these requirements.
Wheel Standards Committee
This SAE Recommended Practice is intended as a guide toward standard practice and is subject to change to keep pace with experience and technical advances. This document establishes additional performance requirements and provides test methods and requirements to evaluate the suitability of materials intended for optical applications in motor vehicles. The tests are intended to determine physical and optical characteristics of the materials only. Performance expectations of finished assemblies, including plastic components, are to be based on tests for lighting devices, as specified in SAE Standards and Recommended Practices for motor vehicle lighting equipment. Glass and materials inclusive to the light source are not in scope for this method.
Lighting Materials Standards Committee
To meet the International Maritime Organization’s (IMO) short-term greenhouse gas (GHG) reduction targets, partial decarbonization of the existing fleet, often powered by medium-speed diesel engines, is required. One approach for reducing CO2 emissions is to enrich the charge air with hydrogen to substitute diesel. However, hydrogen’s high reactivity can lead to combustion abnormalities such as backfire, pre-ignition, and knocking, thus limiting the feasible admixture rates. These challenges are particularly relevant in medium-speed diesel engines designed for high power output and efficiency at low rpm. While hydrogen fuel-share has previously been tested in small-bore engines at moderate loads, this study investigates the influence on combustion and achievable hydrogen admixture rates in a medium-speed, 4-stroke diesel engine operating with up to 30 bar net indicated mean effective pressure (net IMEP). To minimize retrofitting efforts and to preserve diesel performance, the
Achenbach, TobiasMeinert, RobertMahler, KayKunkel, ChristianRösler, SebastianPrager, MaximilianJaensch, Malte
This SAE Recommended Practice provides minimum performance requirements and uniform procedures for fatigue testing of wheels intended for normal highway use and temporary use on passenger cars, light trucks, and multipurpose vehicles. For heavy truck wheels and wheels intended to be used as duals, refer to SAE J267. For wheels used on trailers drawn by passenger cars, light trucks, or multipurpose vehicles, refer to SAE J1204. These minimum performance requirements apply only to wheels made of materials included in Tables 1 to 4. The minimum cycles noted in Tables 1 through 4 are to be used on individual test and a sample of tests conducted, with Weibull Statistics using two parameter, median ranks, 50% confidence level, and 90% reliability, typically noted as B10C50.
Wheel Standards Committee
These general guidelines and precautions apply to personnel operating directional drilling tracking equipment when used with horizontal directional drilling (HDD) machines as defined in ISO 21467:2023.
MTC9, Trenching and Horizontal Earthboring Machines
This specification covers quality assurance sampling and testing procedures used to determine conformance to applicable specification requirements of carbon and low-alloy steel forgings.
AMS E Carbon and Low Alloy Steels Committee
The purpose of this SAE Aerospace Recommended Practice (ARP) is to provide recommendations which will lead to the standardization of interior door design and operation in all transport aircraft. Interior doors are broadly classified into two main categories which include egress path doors and non-egress path doors. The scope of this ARP does not include crew rest doors, secondary barriers to the flight deck, or doors incorporated in furniture surrounding passenger seats as defined in AS6960.
S-9B Cabin Interiors and Furnishings Committee
This specification covers a corrosion- and heat-resistant steel in the form of welding wire.
AMS F Corrosion and Heat Resistant Alloys Committee
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
This specification covers a heat-treatable, corrosion-resistant steel in the form of bars, wire, forgings, mechanical tubing, and stock for forging or heading.
AMS F Corrosion and Heat Resistant Alloys Committee
This SAE Aerospace Recommended Practice (ARP) is written for individuals associated with the ground-level testing of large and small gas turbine engines and particularly for those who might be interested in constructing new or adding to existing engine test cell facilities.
EG-1E Gas Turbine Test Facilities and Equipment
This specification covers an aluminum alloy in the form of Alclad sheet and plate 0.040 to 1.000 inch, inclusive (1.02 to 25.40 mm, inclusive) in nominal thickness (see 8.5).
AMS D Nonferrous Alloys Committee
E-25 General Standards for Aerospace and Propulsion Systems