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Research on Minimum Sound Specifications for Hybrid and Electric Vehicles

Author : Aaron L. Hastings

Publisher :

Page : 90 pages

File Size : 34,89 MB

Release : 2012

Category : Blind

ISBN :

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Book Description

"This report documents research by the National Highway Traffic Safety Administration (NHTSA) to identify ways to develop sound specifications for electric and hybrid vehicles. The research was conducted to support activities related to the implementation of the Pedestrian Safety Enhancement Act of2010. The Pedestrian Safety Enhancement Act (PSEA) requires NHTSA to conduct a rulemaking to establish a Federal Motor Vehicle Safety Standard (FMVSS) requiring an alert sound for pedestrians to be emitted by all types of motor vehicles that are electric or hybrid (EVs and HVs). The goal is to establish performance requirements for an alert sound that allows blind and other pedestrians to reasonably detect a nearby EV or HV. The alert sound must not require activation by the driver or the pedestrian, and must allow pedestrians to reasonably detect an EV or HV in critical operating scenarios such as, but not limited to, constant speed, accelerating, or decelerating. Sound specifications would include criteria for sounds to be detectable and recognizable as the sound of a motor vehicle in operation. Two concepts to identify potential detectability specifications for alert sounds are explored: (a) minimum sound levels based on psychoacoustic modeling and detection distances and (b) minimum sound levels based on the sound of internal combustion engine (ICE) vehicles. Potential detectability specifications are discussed in terms offrequency range and minimum sound level for selected one-third octave bands. Also considered is the relative proportion of acoustical energy emitted from a vehicle as a function of direction (directivity). Recognition includes two aspects: recognition that the sound is emanating from a vehicle and recognition of the type of operation that the vehicle is conducting. Potential specifications to aid in recognition are discussed in terms of broadband noise and tones (tone-to-noise ratio) and ways to denote changes in vehicle speed (pitch-shifting as a function of vehicle speed)."--Technical report documentation page.



Federal Motor Vehicle Safety Standards - Minimum Sound Requirements for Hybrid and Electric Vehicles (Us National Highway Traffic Safety Administration Regulation) (Nhtsa) (2018 Edition)

Author : The Law The Law Library

Publisher : Createspace Independent Publishing Platform

Page : 192 pages

File Size : 19,29 MB

Release : 2018-11-14

Category :

ISBN : 9781729756027

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Book Description

Federal Motor Vehicle Safety Standards - Minimum Sound Requirements for Hybrid and Electric Vehicles (US National Highway Traffic Safety Administration Regulation) (NHTSA) (2018 Edition) The Law Library presents the complete text of the Federal Motor Vehicle Safety Standards - Minimum Sound Requirements for Hybrid and Electric Vehicles (US National Highway Traffic Safety Administration Regulation) (NHTSA) (2018 Edition). Updated as of May 29, 2018 To reduce the risk of pedestrian crashes, especially for the blind and visually-impaired, and to satisfy the mandate in the Pedestrian Safety Enhancement Act (PSEA) of 2010 this final rule establishes a new Federal motor vehicle safety standard (FMVSS) setting minimum sound requirements for hybrid and electric vehicles. This new standard requires hybrid and electric passenger cars, light trucks and vans (LTVs), and low speed vehicles (LSVs) to produce sounds meeting the requirements of this standard. This final rule applies to electric vehicles (EVs) and to those hybrid vehicles (HVs) that are capable of propulsion in any forward or reverse gear without the vehicle's internal combustion engine (ICE) operating. This standard will help to ensure that blind, visually impaired, and other pedestrians are able to detect and recognize nearby hybrid and electric vehicles, as required by the PSEA. This book contains: - The complete text of the Federal Motor Vehicle Safety Standards - Minimum Sound Requirements for Hybrid and Electric Vehicles (US National Highway Traffic Safety Administration Regulation) (NHTSA) (2018 Edition) - A table of contents with the page number of each section



Federal Register

Author :

Publisher :

Page : 284 pages

File Size : 19,5 MB

Release : 2013

Category : Delegated legislation

ISBN :

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Noise, Vibration and Harshness of Electric and Hybrid Vehicles

Author : Lijun Zhang

Publisher : SAE International

Page : 400 pages

File Size : 33,48 MB

Release : 2020-12-29

Category : Technology & Engineering

ISBN : 0768099641

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Book Description

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.



Electric and Hybrid Vehicle Performance and Design Goal Determination Study. Final Report

Author :

Publisher :

Page : pages

File Size : 17,94 MB

Release : 1977

Category :

ISBN :

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Recommendations are set forth for performance standards for near-term and advanced electric and hybrid vehicles. Limited market surveys and interviews with present owners of electric vehicles indicated that the most important criterion for private vehicles is low operating cost. This criterion, combined with the low specific energy density and relatively short life of present storage batteries, was the key factor in the minimum performance specified for near-term private electric vehicles: two or more passengers, 50 km range over the SAE J227a/C driving schedule, with a maximum energy use of about 0.9 MJ/km (0.4 kWh/mi). Near-term commercial vehicles have even lower recommended minimum performance, including 50 km on the (less demanding) SAE J227a/B schedule. Heat-engine battery-electric hybrid vehicles may provide the driving range lacking in electric vehicles and use appreciably less fuel than conventional vehicles. Performance standards recommended for near-term hybrid vehicles call for essentially the same performance as for comparably sized near-term electric vehicles, except for increased range capability. Development specifications recommended for advanced hybrids call for substantially reduced petroleum fuel consumption and the same acceleration capability exhibited by present conventional subcompact cars. Performance standards for a light agricultural utility vehicle are developed.



Noise and Torsional Vibration Analysis of Hybrid Vehicles

Author : Xiaolin Tang

Publisher : Springer Nature

Page : 126 pages

File Size : 11,55 MB

Release : 2022-06-01

Category : Technology & Engineering

ISBN : 3031014987

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Book Description

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.





Automotive Software Engineering

Author : Thomas Zurawka

Publisher : SAE International

Page : 400 pages

File Size : 29,3 MB

Release : 2016-09-18

Category : Computers

ISBN : 0768079926

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Book Description

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.



Motor Vehicle Safety Act of 2010

Author : United States. Congress. House. Committee on Energy and Commerce

Publisher :

Page : 48 pages

File Size : 13,9 MB

Release : 2010

Category : Automobiles

ISBN :

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Shifting Mobility

Author : Dewan Masud Karim

Publisher : CRC Press

Page : 451 pages

File Size : 16,81 MB

Release : 2023-12-01

Category : Computers

ISBN : 1003822797

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Book Description

In the face of resource depletion, environmental changes, lifestyle changes, demographic and digital adaptation, old ideologies of city building and expensive and complex automobility solutions are in freefall. These changes are creating severe friction between the old and new paradigms. This book provides new perspectives through the process of ideological disassociation and concepts of human mobility code. The basic premise of the book, human mobility is an essential component of our creativity that comes from our unconscious desire to become a part of a community. Several new concepts in the book starts with the hallmark of new discovery of human mobility code and its implications of urban mobility boundary systems to stay within safe planetary zone. A new discovery of human mobility code from comprehensive research finding prove that each individual develops a unique mobility footprint and become our mobility identity. Beyond individual hallmarks, human develops collective mobility codes through interaction with the third space on which entire mobility systems lie and are created by the fundamentals of city planning and the design process. Readers are introduced to an innovative mobility planning process and reinvention of multimodal mobility approaches based on new mobility code while formulating new concepts, practical solutions and implementation techniques, tools, policies, and processes to reinforce low-carbon mobility options while addressing social equity, environmental, and health benefits. Finally, the book arms us with knowledge to prevent the disaster of full technological enlightenment against our natural human mobility code.