Download or read book Noise Sources Characterization of Automotive HVAC Systems written by Vahid Madani and published by . This book was released on 2002 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Case History Acoustic Diagnostics of an Automotive HVAC System written by T. A. Brungart and published by . This book was released on 1992 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: The heating, ventilation, and air conditioning (HVAC) system of an automobile can be a source of acoustic annoyance, particularly when it is operated under maximum airflow conditions. In order to suggest possible design changes for the purpose of noise control, a systematic characterization of the acoustic sources and mechanisms must be conducted initially. This paper addresses such a characterization for a typical automotive system. The approach is based on acoustic intensity measurements of the stand-alone HVAC system operating under maximum airflow conditions in an anechoic chamber. The experimental data indicate that the centrifugal blower is the dominant source of noise, particularly at low frequencies, while separation zones, the flow over sharp edges within the HVAC system, louver flows, and flow-induced casing vibration are secondary sources of noise that become increasingly important as the frequency approaches 3 kHz. Qualification of these identified sources of sound is aided by detailed flow visualizations conducted underwater on an optically clear HVAC system utilizing similitude.
Download or read book Acoustic Diagnostics of an Automotive HVAC System written by and published by . This book was released on 1991 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The heating, ventilation, and air conditioning (HVAC) system of an automobile can be a source of acoustic annoyance, particularly when it is operated under maximum airflow conditions. In order to suggest possible design changes for the purpose of noise control, a systematic characterization of the acoustic sources and mechanisms must be conducted initially. This report addresses such a characterization for a typical automotive system. The approach is based on acoustic intensity measurements of the stand-alone HVAC system operating under maximum airflow conditions in the ARL Penn State flow-through anechoic chamber. The experimental data indicate that the centrifugal blower is the dominant low-frequency source of noise, while separation zones and the flow over sharp edges within the HVAC system ducting are secondary sources of noise that become increasingly dominant as the frequency exceeds 3 kHz. Qualification of these identified sources of sound is aided by detailed flow visualizations of the subject system. Recommendations for acoustic improvements to the system are provided.
Download or read book Automotive Software Engineering written by Thomas Zurawka and published by SAE International. This book was released on 2016-09-18 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the early seventies, the development of the automobile has been characterized by a steady increase in the deploymnet of onboard electronics systems and software. This trend continues unabated and is driven by rising end-user demands and increasingly stringent environmental requirements. Today, almost every function onboard the modern vehicle is electronically controlled or monitored. The software-based implementation of vehicle functions provides for unparalleled freedoms of concept and design. However, automobile development calls for the accommodation of contrasting prerequisites – such as higher demands on safety and reliability vs. lower cost ceilings, longer product life cycles vs. shorter development times – along with growing proliferation of model variants. Automotive Software Engineering has established its position at the center of these seemingly conflicting opposites. This book provides background basics as well as numerous suggestions, rare insights, and cases in point concerning those processes, methods, and tools that contribute to the surefooted mastery of the use of electronic systems and software in the contemporary automobile.
Download or read book Noise Vibration and Harshness of Electric and Hybrid Vehicles written by Lijun Zhang and published by SAE International. This book was released on 2020-12-29 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: The noise, vibration, and harshness (NVH), also known as noise and vibration (N&V), is a critical feature for customers to assess the performance and quality of vehicles. NVH characteristics are higher among factors that customers use to judge the vehicle's quality.This book sets out to introduce the basic concepts, principles, and applications of the NVH development and refi nement of Battery Electric Vehicles (BEV), Hybrid Electric Vehicles (HEV), and Fuel Cell Electric Vehicles. Each type comes with its own set of challenges.
Download or read book NBS Special Publication written by and published by . This book was released on 1968 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Index abstracts of SAE Technical Papers written by and published by . This book was released on 2005 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeroacoustic Noise Prediction of Automotive HVAC Systems written by Matthias Tautz and published by . This book was released on 2019-07-15 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of the Centrifugal Fan Noise Generated in Residential HVAC Systems Using In duct Measurements written by Sarah van Tricht and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the National Institute of Standards and Technology Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1976 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications written by United States. National Bureau of Standards and published by . This book was released on 1976 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 3rd International Conference on Electrical and Information Technologies for Rail Transportation EITRT 2017 written by Limin Jia and published by Springer. This book was released on 2018-03-30 with total page 1020 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings collect the latest research trends, methods and experimental results in the field of electrical and information technologies for rail transportation. The topics cover novel traction drive technologies of rail transportation, safety technology of rail transportation system, rail transportation information technology, rail transportation operational management technology, rail transportation cutting-edge theory and technology etc. The proceedings can be a valuable reference work for researchers and graduate students working in rail transportation, electrical engineering and information technologies.
Download or read book Noise and Torsional Vibration Analysis of Hybrid Vehicles written by Xiaolin Tang and published by Springer Nature. This book was released on 2022-06-01 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thanks to the potential of reducing fuel consumption and emissions, hybrid electric vehicles (HEVs) have been attracting more and more attention from car manufacturers and researchers. Due to involving two energy sources, i.e., engine and battery, the powertrain in HEVs is a complicated electromechanical coupling system that generates noise and vibration different from that of a traditional vehicle. Accordingly, it is very important to explore the noise and vibration characteristics of HEVs. In this book, a hybrid vehicle with two motors is taken as an example, consisting of a compound planetary gear set (CPGS) as the power-split device, to analyze the noise and vibration characteristics. It is specifically intended for graduates and anyone with an interest in the electrification of full hybrid vehicles. The book begins with the research background and significance of the HEV. The second chapter presents the structural description and working principal of the target hybrid vehicle. Chapter 3 highlights the noise, vibration, and harshness (NVH) tests and corresponding analysis of the hybrid powertrain. Chapter 4 provides transmission system parameters and meshing stiffness calculation. Chapter 5 discusses the mathematical modeling and analyzes torsional vibration (TV) of HEVs. Finally, modeling of the hybrid powertrain with ADAMS is given in Chapter 6.
Download or read book Highway Safety Literature written by and published by . This book was released on 1978 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Advances in Italian Mechanism Science written by Giuseppe Carbone and published by Springer. This book was released on 2018-10-29 with total page 525 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the Proceedings of the Second International Conference of IFToMM ITALY, held in Cassino, Italy, in 2018. The main topics of the workshop include: Computational Kinematics, Dynamics of Machinery, Gearing and Transmissions, Multibody Dynamics, Mechatronics, Mechanism Design, Tribology, Vibration, Industrial and non-Industrial Applications.
Download or read book Publications of the National Bureau of Standards Catalog written by United States. National Bureau of Standards and published by . This book was released on 1975 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:
