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Viewing 1 to 30 of 3343
2014-11-11
Technical Paper
2014-32-0113
Vipin Sukumaran T., Sumith Joseph, Kamal kant, Vipin P, Mohan D Umate
Abstract In recent past, the two stroke vehicle manufacturers are continuously motivated to develop extreme low emission vehicle for meeting the requirements of emissions regulations. To achieve this emission compliance, manufacturers have developed engines with better induction system, improved ignition timings, increased compression ratio (C.R) and larger after-treatment devices. As an effect of above changes, engine operating temperatures are quite high which reduces the block-piston life. Even though, typical two stroke engines are forced cooled engines, there is a lot of potential for optimizing block cooling to reduce maximum liner temperature and block gradient for enhancing block-piston durability. This paper presents an experimental study of various measures to reduce liner temperature for a two stroke, single cylinder 70 c.c. engine used for two wheeler application. By studying the cooling air flow around the block and block to interface parts heat transfer, the following parts were redesigned to reduce maximum liner temperature - exhaust gasket, base gasket, cooling fan profile and cooling cowl.
2014-10-29
Article
NASA and Aerojet Rocketdyne have successfully completed a series of hot-fire tests on an advanced rocket-engine thrust chamber assembly using copper alloy additive manufacturing technology. Full-scale demonstration is the next step in the technology’s development path.
2014-10-29
WIP Standard
AS9162
This document identifies the basic elements and provides a standard for structuring operator self-verification programs within the aviation, space, and defense industry for producers of commercial and military aircraft and weapons platforms, space vehicles, and all related hardware, software, electronics, engines, and composite components.
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. Until now, it has been translated into 11 languages.
2014-10-20
Article
Meeting the cleanest emissions regulations ever with the phase-in of the Tier 4 Final and Stage IV imposed a new way to design and calibrate off-highway engines.
2014-10-20
Article
GP:50 Corporation LTD’s Model 188/288/388 miniature flush diaphragm pressure transducer series’ unique flush diaphragm design makes possible accurate pressure measurements of high-viscosity fluids, even within high shock and vibration environments, without port plugging and clogging.
2014-10-20
WIP Standard
AS13004
Process Flow Description, PFMEA and Control Plans
2014-10-17
Article
Supercritical Fluid Technologies’ bench top supercritical fluid extractor, the model SFT-110, provides an alternative to traditional extraction methods that use organic solvents.
2014-10-17
Article
W. L. Gore & Associates is expanding its family of high-speed data cables for the aerospace industry to meet the industry’s challenges to improve pilot communication and passenger in-flight entertainment while reducing downtime for maintenance and decreasing operating costs.
2014-10-17
Article
The OM-WLS-TEMP series wireless USB 2.0 full-speed temperature input module from Omega is fully compatible with both USB 1.1 and 2.0.
2014-10-17
Article
WITT-Gasetechnik’s dome-loaded pressure regulator is impervious to system pressure and withdrawal fluctuations.
2014-10-17
WIP Standard
AMS2771F
This specification covers the engineering requirements for heat treatment of aluminum alloy castings and for parts machined from castings.
2014-10-16
WIP Standard
AMS2630D
This specification covers procedures for ultrasonic inspection, by pulse-echo procedures, of flat, rectangular, round, cylindrical, and contoured products having a thickness or cross-sectional dimension greater than 0.50 inch (12.7 mm), using either contact or immersion methods, and using the longitudinal-wave or shear-wave modes or combinations of the two, as necessary. This specification may apply to testing finished machined parts provided the parts can meet the basic testability requirements, such as size, contour, metallurgical structure, and thickness.
2014-10-13
Article
Researchers at VE Commercial Vehicles Ltd. in India employed downsizing to design a commercial vehicle exhaust system using the ANSYS CFD tool Fluent, resulting in a 14.1% reductions in both size and volume and a mass savings of 2%.
2014-10-13
Technical Paper
2014-01-2707
Brian C. Kaul, Benjamin J. Lawler, Charles E.A. Finney, Michelle L. Edwards, Robert M. Wagner
Abstract Advances in engine controls and sensor technology are making advanced, direct, high-speed control of engine combustion more feasible. Control of combustion rate and phasing in low-temperature combustion regimes and active control of cyclic variability in dilute SI combustion are being pursued in laboratory environments with high-quality data acquisition systems, using metrics calculated from in-cylinder pressure. In order to implement these advanced combustion controls in production, lower-quality data will need to be tolerated even if indicated pressure sensors become available. This paper examines the effects of several data quality issues, including phase shifting (incorrect TDC location), reduced data resolution, pressure pegging errors, and random noise on calculated combustion metrics that are used for control feedback. Symbolic data analysis is an effective technique for identifying underlying patterns in noisy data, and has been applied to cyclic variability of dilute SI combustion, identifying deterministic effects that underlie the stochastic variations that are present.
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.
2014-09-30
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
AS9145
APQP is a phased planning process applied to product introductions. Includes specific deliverables to ensure on-time, on-quality, on-cost objectives are met PPAP is an output of the APQP process. Requires Suppliers to demonstrate that they have established a production process that will consistently produce product meeting customers requirements Applies existing tools to ensure products are produced under controlled conditions with minimal variation.
2014-09-30
Technical Paper
2014-01-2430
Rajendra Vivekananda Hosamath, Muralidhar Nagarkatte
Abstract All top ranking automobile companies in the world believe in single word “Quality” and maintaining quality standards is a philosophy, a belief in which we live, a task which cannot be put aside for another day. To achieve the world class quality standards Divgi-Warner meticulously follows a highly effective tool known as Quality System Basics (QSB).QSB helps Divgi-Warner to preserve integrity of commitment to achieve manufacturing excellence. This case study covers the Quality System Basics implementation experience of Divgi-Warner Pvt. Ltd. (DWPL) India, a BorgWarner's plants located at Pune and Sirsi in India. Quality system basic consists of following 10 Key elements to establish world class quality:- 1 Fast Response Meeting (FRM).2 Control of Non-Conforming Product.3 Verification Station.4 Standardized Operations.5 Standardized Operator Training.6 Error Proofing Verification.7 Layered Process Audits (LPA).8 Risk Priority Number (RPN) Reduction.9 Contamination Control.10 Supply Chain Management.
2014-09-30
Technical Paper
2014-01-2297
Mehmet Bakir, Murat Siktas, Serter Atamer
Abstract In today's world, there are a prominent number of weight and cost reduction projects within the vehicle engineering development activities. Regarding this phenomenon, a complete optimization study is applied to a leaf spring assembly, which has 4 leaves and which is used in heavy duty trucks, by reducing the number of leaves down to 3 together with weight and cost reductions. At the first step of the project, the stiffness of the leaf spring is calculated with in-house software based on mathematical calculations using the thickness profile of the leaves. Then the results of these calculations are compared with non-linear elastic leaf spring calculations which are conducted with FEA. This elastic leaf spring finite element model is transferred into Multi-Body-Simulation (MBS) model in order to determine the forces acting on the leaf spring. Using the results of the MBS calculations, which are time histories of the internal forces and moments on the leaf spring, the FE simulations are performed.
2014-09-30
Technical Paper
2014-01-2312
Venkatesan Chokkalingam, Mohan Rao
Abstract The durability of the components in a vehicle plays one of the major roles in its life cycle cost. The powertrain mount is one such component since its rubber characteristics have significant impact on the vehicle's NVH and fatigue life. This paper presents the enhanced durability benefits obtained by changing the polymer composition, manufacturing methods and design optimization of a powertrain mount for an off-road commercial vehicle. The methodology involved characterization[2] of the existing mount, arriving a new compound formulation, making of prototypes, experimental validation for durability[3] and repeatability in the laboratory combined with rigorous on field vehicle trials. NVH measurements were also carried out on the improved mounts. The above exhaustive exercise resulted in the development of a comprehensively far better mount than an existing mount with improved durability without compromise on NVH properties. The cost benefit in terms of the total vehicle life was enhanced to a large extent.
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
Technical Paper
2014-01-2308
Zhigang Wei, Shengbin Lin, Limin Luo, Litang Gao
Road vibrations cause fatigue failures in vehicle components and systems. Therefore, reliable and accurate damage and life assessment is crucial to the durability and reliability performances of vehicles, especially at early design stages. However, durability and reliability assessment is difficult not only because of the unknown underlying damage mechanisms, such as crack initiation and crack growth, but also due to the large uncertainties introduced by many factors during operation. How to effectively and accurately assess the damage status and quantitatively measure the uncertainties in a damage evolution process is an important but still unsolved task in engineering probabilistic analysis. In this paper, a new procedure is developed to assess the durability and reliability performance, and characterize the uncertainties of damage evolution of components under constant amplitude loadings. The linear and two nonlinear probabilistic damage accumulation models are briefly described first.
2014-09-30
Technical Paper
2014-01-2307
Zhigang Wei, Limin Luo, Shengbin Lin
This paper reviews the correlation concepts and tools available, with the emphasis on their historical origins, mathematical properties and applications. Two of the most commonly used statistical correlation indicators, i.e., modal assurance criterion (MAC) for structural deformation pattern identification/correlation and the coefficient of determination (R2) for data correlation are investigated. The mathematical structure of R2 is critically examined, and the physical meanings and their implications are discussed. Based on the insights gained from these analyses, a data scatter measure and a dependency measure are proposed. The applications of the measures for both linear and nonlinear data are also discussed. Finally, several worked examples in vehicle dynamics analysis and statistical data analyses are provided to demonstrate the effectiveness of these concepts.
2014-09-24
Article
The use of quenched and tempered steels for dumper bodies reduces weight and fuel consumption while increasing payload capacity and wear life.
2014-09-23
WIP Standard
AMS2475H
This specification establishes the requirements for chromate conversion coatings on magnesium alloys. This process has been used typically to improve corrosion resistance and adherence of organic finishes but usage is not limited to such applications. The dichromate treatment may not be suitable for alloys with high manganese content. The chrome pickle treatment has been used as touch-up for previously dichromate-treated surfaces and for improving corrosion protection temporarily, but usages are not limited to such applications.
2014-09-23
WIP Standard
AMS2481K
This specification covers the requirements for a manganese phosphate coating on ferrous alloys.
2014-09-23
WIP Standard
AMS2482E
This specification establishes the requirements for a hard aluminum oxide coating, impregnated or codeposited with polytetrafluoroethylene (PTFE) on aluminum alloys.
2014-09-22
Article
Internal combustion engines are poised for dramatic breakthroughs in improving efficiency with lower emissions, due in part to low-temperature combustion regimes. Such regimes show great efficiency and emissions potential, but they present optimization and control challenges.
2014-09-16
Technical Paper
2014-01-2262
Rostislav Sirotkin, Galina Susova, Gennadii Shcherbakov
Abstract Within the Russian aviation industry the necessary level of reliability risks related to the failures of aircraft mechanical parts and systems vital to the safety of flight is assured via the system of activities aimed at influencing the parameters of critical parts (CP). The goal of the system is to provide a relationship between activities aimed at prevention of dangerous failures at all phases of airplane life cycle. The system operation is regulated by the normative documents and by controlling their observance. Normative documents containing requirements and recommendations were developed about 15 years ago based on the industry experience and traditions and taking into account the requirements of AS9100 series of international standards [2] wherever possible. The documents were developed taking into account typical safety management errors outlined in [1]. Requirements specifying the necessity of CP-related activities are specified in the national standards concerning the organization of quality management system (QMS) in the aviation industry as well as programs of safety, reliability and maintainability activities.
Viewing 1 to 30 of 3343

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