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Article
2014-03-04
TRW Automotive's steering-wheel concept being shown at the 2014 Geneva Motor Show supports semi and fully automated driving via several multifunctional features including hands on/off detection. The steering wheel is featured in Rinspeed's steer-by-wire XchangE electric vehicle concept.
Magazine
2014-03-04
What's New at ConExpo/IFPE More new products and technologies that companies plan to showcase at this year's ConExpo-Con/Agg, which is co-located with the IFPE fluid-power event in Las Vegas from March 4-8, are previewed. Gearshift actuator dynamics in a dual clutch transmission The emergence of tougher environmental and fuel efficient legislations have triggered exploration and advance toward new and better vehicle transmission technologies. Software makes solid impact Programs are helping hydraulic systems do more while reducing operator workloads. Damping out booming noise NVH improvement techniques are gaining traction with the goal to improve the quality perception of off-highway equipment performance and operator comfort.
WIP Standard
2014-03-04
This SAE Standard is used to determine the mass per unit area, in grams per square meter, of materials used for trimming automobile interiors.
Standard
2014-02-27
The J1939 Digital Annex 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. For all other SPNs and PGNs which are published in a document other than SAE J1939-71, J1939DA lists only basic details along with a reference to the document that contains the complete technical details. J1939DA replaces, and expands upon, the 1939 Companion Spreadsheet (CS1939), which was last published through November 2012. The data fields included in J1939DA for PGNs are: PGN Parameter Group Label Acronyn EDP DP PF PGN Length PS PGN Description Multipacket Transmission Rate PGN Data Length Default Priority PGN Reference PGN Document The data fields included in J1939DA for SPNs are: SPN SPN Name SPN Description SPN Length Resolution Offset Data Range Operational Range Units SLOT Identifier SPN Type SPN Reference SPN Document The J1939 Digital Annex is current through Fourth Quarter 2013 and can be purchased separately or as part of the SAE J1939 Standards Collection on the Web.
Standard
2014-02-21
This SAE document defines a recommended practice for implementing circuit identification for electrical power and signal distribution systems of the Class 8 trucks and tractors. This document provides a description of a supplemental circuit identifier that shall be utilized in conjunction with the original equipment manufacturer’s primary circuit identification as used in wire harnesses but does not include electrical or electronic devices which have pigtails. The supplemental circuit identifier is cross-referenced to a specified subsystem of the power and signal distribution system identified in Section 5.
Article
2014-02-18
Grede is developing lightweight chassis, powertrain, and drivetrain components—including safety-critical systems—for several heavy-equipment manufacturers using a patented ductile iron alloy called SiboDur.
Article
2014-02-17
Turning circle greatly improved using a model implemented in MapleSim, holding out promise for better active-tilting designs that can improve vehicle maneuverability in congested cities.
Standard
2014-02-17
This SAE Recommended Practice describes an evaluation procedure for validating tire models for use in road load simulations and assesses the relevant dynamic behavior of tires. The laboratory test utilized is a “cleat” test, where a rolling tire on a drum encounters a cleat and the resulting dynamic forces and moments are measured. This test is described in SAE J2730, “Dynamic Cleat Test with Perpendicular and Inclined Cleats”. The test is commonly used to identify tire model parameters. In this recommended practice, requirements for the measurement of the tire’s response are described along with data processing techniques and calculations used to quantitatively compare the tire model’s calculated response to the tire’s response measured on test. This recommended practice addresses both the tire model structure and its parameters.
Standard
2014-02-05
This SAE Recommended Practice provides instructions and test procedures for air braked vehicles including but not limited to trucks, truck-tractors, trailers, dollies, and buses used on highways but does not include off-highway vehicles. Purpose This document provides a method of determining the air reservoir capacity of highway type vehicles using compressed air to actuate or transmit actuation power to the foundation brakes. Air reservoir capacity is the ability to provide adequate brake pressure after a number of brake applications.
Standard
2014-02-03
This SAE Recommended Practice is intended for hubs and spoke wheels used on Class 6, 7, and 8 truck/truck-tractor non-powered front axles, powered and non-powered rear axles and trailer axles, for which bearing setting is manually adjusted. Assemblies using spacers to control bearing preload and endplay may differ in geometry and bearing componentry.
Magazine
2014-02-01
Evaluation of heavy-vehicle aerodynamic drag In an attempt to achieve a balance between Reynolds number, model scale, and tunnel blockage issues, a 1:3 scale heavy-vehicle testing program has been initiated at the Monash University 1.4-MW wind tunnel. Validating performance suspension parts advances A forum at the 2013 SEMA Show discussed three approaches to ensure performance parts compliance with Federal Motor Vehicle Safety Standard 126. Panelists also explained how simulation data, and kinematics and compliance measurements, can improve performance parts design. Active safety starts in the pilot's seat Dassault Aviation's next-generation integrated digital avionics systems contribute to enhanced air safety in civil applications. Chevrolet ups the performance ante with MY2015 Corvette Z06 Stiffer-bodied sports car gains wind-aided performance with supercharging and downforce for faster lap times.
Book
2014-01-30
The market for light vehicle suspension systems has been changing rapidly over the past few years as technology has enabled levels of comfort and road-holding to improve well beyond the boundaries of the compromise between comfort and safety that once effectively limited performance. Today, as part of an integrated chassis, advanced suspension systems are a key area through which one vehicle can be differentiated from another and on which OEMs look to build the essential 'DNA" of a vehicle. This report examines the key market drivers in this sector and details materials considerations, increasing electrification, challenges and barriers, chassis and suspension weight reduction and suspension performance. Furthermore the report looks at kinematics & elastokinematics along with the move from passive to active suspension. The report goes on to include detailed sections on suspension element technology and dampers & shock absorbers. The report also includes an appendix of 13 supplier profiles from suppliers of automotive suspension systems.
Book
2014-01-27
Boris Nikolaevich Belousov, Sergey D. Popov
Heavy-duty wheeled vehicles (HDWVs) are all-wheel-drive vehicles that carry 25 tons or more and have three or more axles. They transport heavy, bulky cargo such as raw minerals, timber, construction materials, pre-fabricated modules, weapons, combat vehicles, and more. HDWVs are used in a variety of industries (mining, logging, construction, energy) and are critical to a country’s economy and defense. These vehicles have unique development requirements due to their high loads, huge dimensions, and specific operating conditions. Hauling efficiencies can be improved by increasing vehicle load capacity; however capacities are influenced by legislation, road limits, and design. Designing HDWVs differs from other multi-purpose all-wheel-drive vehicles. The chassis must be custom-designed to suit the customer’s particular purpose. The number of axles is another variable, as well as which ones are driving and which are driven. Tires are also customizable. Translated by SAE from Russian, this book narrates the history of HDWVs and presents the theory and calculations required to design them.
Article
2014-01-24
A new SAE International book narrates the history of heavy-duty wheeled vehicles and presents the theory and calculations required to design them. Translated from Russian, the book summarizes the results of the authors’ academic research and experience, and presents innovative technical solutions used for electric and hydrostatic transmissions, steering systems, and active safety of these vehicles.
Article
2014-01-24
Knorr-Bremse has expanded its production capacity in India in both the rail- and commercial-vehicle (CV) sectors with the opening of two new facilities in Palwal and Pune, as well as a new Development Center in Pune to be shared by its two divisions.
Article
2014-01-20
A brake pedal made from fiber-reinforced plastics debuts on a MY2014 sports car, and ZF's CEO says this application underscores the broad possibilities for lightweight materials.
Article
2014-01-12
Researchers at Ashok Leyland make a case for choosing stainless steel over galvanized steel and aluminum for the complete bus structure. Although the initial material cost is higher for stainless steel, it scores better in other areas including mechanical and thermal properties and optimized structure weight. On the whole, the lower life cycle cost (LCC) offsets the initial material cost and yields rich dividends to the end customer, they claim.
Article
2014-01-08
With the world's first pickup featuring an all-aluminum body and cargo box and full LED lighting, Ford leapfrogs its domestic and Japanese competition in the highly profitable full-size truck segment. The structures feature 5xxx- and 6xxx-series alloy sheet, the latter with a T4 temper.
Standard
2014-01-08
This standard is for cutting edge sections typically used in earth-moving machinery defined in SAE J1116 and ISO 6165: a. Scrapers as defined in ISO 7133. b. Dozers as described in ISO 6747. c. Loaders as described in ISO 7131. d. Graders as described in ISO 7134. Hole spacing is defined ISO 7129. Hole conformation is defined in SAE J740.
Article
2014-01-06
Bridgestone Commercial Solutions has launched the Bridgestone R244 all-position steer radial tire. The new tire meets the demands of dump trucks and concrete mixer truck fleets that spend a higher percentage of their miles in on-highway use.
Article
2014-01-06
Wheel rim components made of 3/4-in steel plate in diameters to 40 in (1016 mm) and larger for use on tractors and other off-highway vehicles are fabricated by Acme Metal Spinning. Available in quantities of five to a few hundred or more, these components are fabricated using Acme’s advanced metal spinning processes.
Standard
2014-01-03
This SAE Recommended Practice establishes the mounting hardware to be used with demountable rims, wheels for demountable rims, rim spacers designed for 28 degrees bevel mounting systems, and intended for use on commercial vehicles. The dimensions given are those necessary to maintain serviceability and interchangeability of mounting hardware. This document is divided into two sections. Section 1 establishes the practice for new designs for mounting hardware. Section 2 records information on current mounting hardware. Special and less common applications are not covered in this document.
Book
2014-01-01
Michael Spektor
Solving Engineering Problems in Dynamics helps practicing engineers successfully analyze real mechanical systems by presenting comprehensive methods for analyzing the motion of engineering systems and their components. This analysis covers three basic phases: 1) composing the differential equation of motion; 2) solving the differential equation of motion; and 3) analyzing the solution. Although a formal engineering education provides the fundamental skills for completing these phases, many engineers nonetheless would benefit by gaining further insight in using these fundamentals to solve real-life engineering problems. This book thus describes in step-by-step order the methods related to each of these phases. Features • A basic education in engineering is sufficient to master the contents of this guide and effectively apply its step-by-step methods for solving engineering problems. • Numerous solutions of examples of linear, non-linear, and two-degree-of-freedom systems are found throughout. • Explains the structures of differential equations of motion of the two-degree-of-freedom systems and demonstrates the applicability of the Laplace Transform methodology for solving these equations. • Many types of engineers can benefit from this book (as well as students in mechanical, manufacturing, and industrial engineering).
Standard
2013-12-20
This SAE Recommended Practice establishes a uniform procedure for the level road test of the brake systems of all classes of motorcycles intended for highway use.
Technical Paper
2013-12-20
Claire Mercier
As part of the aircraft certification process, landing gear has to be certified against particular risks such as bird and tyre impact cases. According to international aviation regulations, it has to be demonstrated that the landing gear is designed to ensure the capability for continued safe flight and landing after bird impact or after tyre impact resulting from wheel or tyre failure. Structural parts such as the down-lock mechanism must be validated against these requirements since their structural integrity is essential to ensure landing gear down-locking for landing and subsequent on ground movement. Recently, MESSIER-BUGATTI-DOWTY has been involved in the development of explicit analysis in support of bird and tyre impact justification. A model of the down-lock mechanism has been developed and a full scale test has been set up in order to demonstrate the validity of the analysis. Two extensive test campaigns have been performed considering bird and tyre impact cases using highly instrumented components to record strains and displacements on impacted parts.
Standard
2013-12-20
This procedure describes a method for generating, preparing and analyzing samples of new and unused brake friction materials for their chemical constituents.
Standard
2013-12-17
This SAE Standard specifies brake system performance and test criteria to enable uniform evaluation of the braking capability of self-propelled, ride-on vibratory steel wheel, static steel wheel, and rubber-tire roller compactors with maximum level surface machine speeds of 25 km/h or less. Service, secondary, and parking brakes are included. Machines with maximum level surface machine speeds greater than 25 km/h shall conform to the requirements of SAE J/ISO 3450.
Standard
2013-12-17
This SAE Recommended Practice applies to S-CAM, Wedge, and Disc air brake actuators where the stroke can be measured without disassembly from the brake.
Standard
2013-12-16
This SAE Aerospace Recommended Practice (ARP) defines a procedure for demonstrating service overload capability for new, main and nose landing gear, radial or bias tires fitted on multiple wheel landing gear of Part 25 certified aircraft.
Standard
2013-12-16
This SAE Aerospace Information Report (AIR) identifies current nondestructive inspection (NDI) methods used to ensure product integrity and maximize "in service" life of the major structural components of aircraft wheel and brake assemblies.
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