Display:

Results

Viewing 151 to 180 of 7510
2014-11-11
Technical Paper
2014-32-0115
Mikael Bergman, Magnus Bergwall, Thomas Elm, Sascha Louring, Lars Nielsen
Abstract Present two stroke engines used for hand held power tools must confirm to prevailing emission legislation. A fact is that today the engines have to be run at leaner air fuel setting resulting in less amount of lubrication oil passing through the engine. This lean mixture combined with high mixture trapping efficiency also affects the combustion, raising the overall working temperature of the engine. So to gain more robustness out of these air-cooled power heads one viable route is to use different coatings to take control of tribology and heat management within the two stroke power head. In this paper a first discussion and description of the different coatings and their merits to the air cooled two stroke engine is conducted. Furthermore engine data for the test engine, in this case a 70cc professional chainsaw are presented. The outcome of engine dyno testing of the different coatings are presented and analyzed for further discussion.
2014-11-11
Journal Article
2014-32-0009
Alexander Trattner, Helmut Grassberger, Oliver Schoegl, Stephan Schmidt, Roland Kirchberger, Helmut Eichlseder, Armin Kölmel, Stephan Meyer, Tim Gegg
Abstract One of the most significant current discussions worldwide is the anthropogenic climate change accompanying fossil fuel consumption. Sustainable development in all fields of combustion engines is required with the principal objective to enhance efficiency. This certainly concerns the field of hand-held power tools as well. Today, two-stroke SI engines equipped with a carburetor are the most widely used propulsion technology in hand-held power tools like chain saws and grass trimmers. To date, research tended to focus on two-stroke engines with rich mixture setting. In this paper the advantages and challenges of leaner and/or lean operation are discussed. Experimental investigations regarding the influence of equivalence ratio on emissions, fuel consumption and power have been performed. Accompanying 3D-CFD simulations support the experiments in order to gain insight into these complex processes. The investigations concentrate on two different mixture formation processes, i.e.
2014-11-10
Book
Ian K. Jennions
Integrated Vehicle Health Management: Implementation and Lessons Learned is the fourth title in the IVHM series published by SAE International. This new book introduces a variety of case studies, lessons learned, and insights on what it really means to develop, implement, or manage an integrated system of systems. Integrated Vehicle Health Management: Implementation and Lessons Learned brings to the reader a wide set of hands-on stories, made possible by the contribution of twenty-three authors, who agreed to share their experience and wisdom on how new technologies are developed and put to work. This effort was again coordinated by Dr. Ian K. Jennions, Director of the IVHM Centre at Cranfield University (UK), and editor of the previous books in the series.
2014-11-05
WIP Standard
ARP6887
The ARP shall cover the objectives and activities of Verification & Vallidation Processes required to assure high quality and/or criticality level of an IVHM Systems and Software.
2014-11-04
Article
The basic architecture of General Motors' small block V8 has remained the same since 1955, but now a new crate engine with modern-day advanced technologies is available on the aftermarket.
2014-11-04
Standard
TSB002_201411
ABSTRACT
2014-11-04
Standard
TSB004_201411
ABSTRACT
2014-11-04
Standard
J2403DA_201411
This document is intended to supplement SAE J2403 by providing the content of Table 1, Table 2, and Table 3 from SAE J2403 in a form that can be sorted and searched for easier use. It is NOT intended as a substitute for the actual document, and any discrepancies between this Digital Annex and the published SAE J2403 document must be resolved in favor of the published document. This document provides the content of Table 1 and Table 2 published in SAE J2403 into the single table in the 'Term' tab, while the 'Recommended Term Definitions' tab provides the content of Table 3 in SAE J2403 and the 'Glossary' tab provides the content of Table 4 in SAE J2403.
2014-10-29
WIP Standard
ARP6307
This document is for establishing and addressing anomalies on appearance of new and newly retreaded tires.
2014-10-24
Standard
J67_201410
This SAE Standard applies to all machines with shovel, clam, or dragline attachment. The purpose of this document is to provide a uniform method for determining the SAE rated capacity and SAE struck capacity for shovel dippers and clam buckets, and the SAE rated capacity for dragline buckets.
2014-10-22
WIP Standard
GEIASTD0009A
This standard requires the developers and customer/user's working as a team to plan and implement a reliability program that provides systems/products that satisfy the user's requirements and expectations. The user's requirements and needs are expressed in the form of the following four reliability objectives: The developer shall solicit, investigate, analyze, understand and agree to the user's requirements and product needs. The developer, working with the customer and user, shall include the activities necessary to ensure that the user's requirements and product needs are fully understood and defined, so that a comprehensive design specification and Reliability Program Plan can be generated; The developer shall use well-defined reliability- and systems-engineering processes to develop, design, and verify that the system/product meets the user's documented reliability requirements and needs.
2014-10-22
Book
The new Bosch Automotive Handbook , now in its 9th English edition, has been completely revised and enhanced to include the most recent developments in automotive technology. About 200 specialist authors contributed to this new version of every engineer’s must-have reference. The book's format has been revised: it is now 20 percent longer and wider, as this allows for a larger font size. This makes the texts and graphics easier to read. The index has been strongly expanded to make looking up technical terms easier. The Bosch Automotive Handbook is a best-seller, with a broad global readership. Students of engineering programs consult it, as do researchers and engineers in the automotive industry. Mechanics who are studying to become master craftsmen also use it as a reference work. Experts trust the well-founded and extensive expertise that can be found in the classic. The Bosch Automotive Handbook is widely regarded around the world as a standard work for automotive technology.
2014-10-13
Technical Paper
2014-01-2589
Chunshan Li, Guoying Chen, Changfu Zong
Abstract The passive fault-tolerant approach for four-wheel independently driven and steered (4WID/4WIS) electric vehicles has been investigated in this study. An adaptive control based passive fault-tolerant controller is designed to improve vehicle safety, performance and maneuverability when an actuator fault happens. The proposed fault tolerant control method consists of the following three parts: 1) a fault detection and diagnosis (FDD) module that monitors vehicle driving condition, detects and diagnoses actuator failures with the inequality constraints; 2) a motion controller that computes the generalized forces/moments to track the desired vehicle motion using Model Predictive Control (MPC); 3) a reconfigurable control allocator that redistributes the generalized forces/moments to four wheels with equality constrained optimization.
2014-10-08
Standard
AIR6226
Most of the Trimmable Horizontal Stabilizer Actuators (THSA) feature a dual structural load path, the primary load path being loaded, the secondary load path being normally unloaded, or both load paths sharing in parallel the Horizontal Stabilizer load. This document describes existing methods for detecting rupture or disconnection of loaded load paths as an overview for those specifying or designing Horizontal Stabilizer Trim Actuators in order to compare existing solutions as reference for implementation in new aircraft programs.
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
Standard
ARP1558
This SAE Aerospace Recommended Practice (ARP) discusses damage to aircraft fuselages caused by ground equipment contact at servicing and recommends methods to be incorporated or considered in ground equipment design for protection against that damage.
2014-10-02
WIP Standard
ARP6335
The document will provide industry best practicies to detect, identify and prevent malicious electronic parts and embedded firmware / software for entering the DoD Supply Chain. The best practices will assist the DoD contractors to meet the requirements of DoD D 5000.02, DoD I 5200.39 and DoD I 5200.44 to ensure the integrity and trust of microelectronic components and software being designed and built into DoD systems.
2014-10-01
Standard
CMB6_2
This training program is designed to introduce and examine the principles of Configuration and Data Management. The program will present an overview of the origin and evoluation of Configuration/Data Management and define the elements of identification, control, status accounting, audits and data requirements, tracking and monitoring. This program will also explore the relationship between Configuration/Data Management and other organizations/elements and their involvement in the system life cycle.
2014-10-01
Standard
CMB6_4
The objective of this course is to provide an in-depth understanding of the concepts and principles involved in the configuration control process. It is intended for an individual who has completed a basic introductory course in CM and who requires the deeper knowledge of a CM practitioner rather than a superficial overview. The overall objective of configuration management is to guarantee the buyer that a given product is what it was intended to be, functionally and physically as defined by contractual drawings and specifications, and to identify the configuration to the lowest level of assembly required to assure repeatable performance, quality, maintainability and reliability in all units of the same product.
2014-10-01
Standard
GEIAHB748_1
This guide clearly defines the purpose, goals, and objectives of an IBR. It also describes the attributes of an effective IBR and discusses a baseline review process that will lead to a better understanding of program risks. It provides a common definition and framework for the IBR Process. This process harmonizes, and to the extent possible, unifies the management objectives for all PMs. The IBR Process enables managers to effectively utilize the project Performance Measurement Baseline (PMB) to assess performance, and to better understand inherent risks. The IBR Process should continue throughout the life of a project.
2014-10-01
Standard
CMB6_8
Data Management in house training course.
2014-10-01
Standard
CMB6_10
In today's high technology environment, a variety of management tools have been developed within government and industry to govern the fast changing technical environment. There is a particular demand in industry for formal education in the disciplines of Configuration Management and Data Management (CM/DM). Briefly, Configuration Management is the disciplined continuous identification of design and control of changes. Data Management ensures that the data (technical, financial, administrative) delivered as part of a contract comply with contractual requirements and are adequate to satisfy the intended use or functions (e.g. logistics, maintenance, reprocurement).
2014-10-01
Standard
CMB6_9
The functional and/or physical characteristics or hardware/software as set forth in technical documentation and achieved in a product. What is Configuration Management? A discipline applying technical and administrative direction and surveillance to (a) identify and document the functional and physical characteristics of a configuration item, (b) control changes to those characteristics, and (c) record and report change processing and implementation status.
2014-09-30
Standard
AIR1673B
Manufacturers/designers of all aircraft equipped with a pallet/container capability have provided a means of linking the ground loaders/elevators with the aircraft sill for the smoother transfer of pallets and containers into or out of the aircraft holds. Use of the aircraft attachment points may be used as a means of averting damage to the aircraft door frames and other important parts. Latch-on guarantees fore and aft and vertical alignment of the loader bed with the aircraft doorway, when used in conjunction with the appropriate ground equipment. This SAE Aerospace Information Report (AIR) has been prepared by SAE Subcommittee AGE-2A to present a review of the current range of aircraft attachment points on wide body aircraft and those narrow body aircraft with a ULD cargo capability. Airline operators, who utilized these facilities, have been faced with a growing number of adaptor bars necessary to suit each type of aircraft and door position.
2014-09-30
Technical Paper
2014-01-2427
Giorgio Malaguti, Carlo Ferraresi, Luca Dariz, Massimiliano Ruggeri
Abstract Alongside with the increasing vehicle complexity, the functionalities related to the safety, diagnosis and maintainability have become critical. The operators of special machines such as agricultural, mining, construction vehicles might be overwhelmed by this increased complexity and, as a result, operations for the recovery or maintenance of their vehicles become difficult. The Augmented Reality (AR) seems to be a very promising technology both if applied to traditional smart-phones or to the upcoming glasses, that has been just presented to the market by several manufacturers. This paper reviews some use cases of applications created in Institute for Agricultural and Earthmoving Machines (IMAMOTER) of the National research Council of Italy (CNR) engineers laboratories, which propose a novel approach for assisted maintenance, recovery or training.
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
Technical Paper
2014-36-0146
Tiago Stival, Claudia Regina de Andrade
Abstract Nowadays, the most common technologies used in the aircraft ice protection systems use indirect methods that identify atmospheric conditions prone to ice accretion, and not in fact the ice accretion over the surfaces, not measuring this accreted ice. On top of that, the ice protection systems are designed based on a certain flight phase considered the most critical for the system and its operation does not depend on the severity of the ice condition. Using direct methods for detecting the ice accretion on the protected areas and a control system based on the feedback of these sensors, it is possible to reduce the energetic consumption and measuring the ice accreted, optimize it, reducing the penalties for the propulsion system and the aircraft design.
2014-09-30
Technical Paper
2014-36-0166
Carla K. Mauerberg Gerulaitis, Cleber Willian Gomes, Paulo Carpenito
Abstract This paper describes the strategy of lubricant oil service interval for commercial truck based on new engine technology (PROCONVE P7), the fleet owner's needs, vehicle typical application route, operational costs related to oil change, design of oil pan to adequate the oil volume and lubricant oil available technology. In result, this analysis shows the best annual operational cost for customer in terms of oil change.
2014-09-30
Technical Paper
2014-36-0230
Marcelo Vandresen, Diovani C. Lencina, Carolina P. Fernandes, Luana N. Silva, Lucas D. P. Feliciano, Humberto R. Cazangi
Abstract The compression springs of the valves of automotive engines are key elements in the dynamic behavior of the engine. Its wear is slow, gradual and progressive; so the driver of the vehicle eventually get used to the decrease in the engine performance. The compressive force losses cause the valves to close slower than expected and, consequently, the engines lose their efficiency. Professionals in the area of automotive maintenance apply empirical tests with varying criteria to evaluate and to determine the life cycle end at which the springs must be replaced. This article describes the development of a workbench for compression springs based on existing models on the market and the main premise is the low cost. Correspondent loads involved were determined and the components were modeled in CAD, allowing to develop a robust device able to handle the loads generated by the compression spring.
2014-09-30
Technical Paper
2014-36-0244
Israel João Cancino Junior, Douglas Fazzolari
Abstract Normally the automaker uses a specific Engineering criteria for serviceability with minimum clearance specification. Due to Front Over Hang reduction (Figure 1) regarding to Emerging Markets countries and technology inside in the hood compartment, the H4 bulb serviceability is affected. This paper shows a solution that provides an easy service procedure reducing package and complete sealed connector system for an H4 head lamp bulb. Figure 1 Front over Hang Reduction.
Viewing 151 to 180 of 7510

Filter