National Stationary Exhaust Noise Test Procedures for In-service Motor Vehicles PDF Download
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Author: Australia. National Road Transport Commission
Publisher:
ISBN: 9780642544568
Category : Motor vehicles
Languages : en
Pages : 10
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Book Description
Author: Australia. National Road Transport Commission
Publisher:
ISBN: 9780642544568
Category : Motor vehicles
Languages : en
Pages : 10
Get Book Here
Book Description
Author: Light Vehicle Exterior Sound Level Standards Committee
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
This SAE Recommended Practice establishes the test procedure, environment, and instrumentation to be used for measuring the exterior exhaust sound level for passenger cars, multipurpose vehicles, and light trucks under stationary conditions providing a continuous measure of exhaust system or simulated exhaust sound level over a range of engine speeds or simulated engine speeds.This document applies only to road vehicles equipped with an internal combustion engine or with an external sound system.The method is designed to meet the requirements of simplicity as far as they are consistent with reproducibility of results under the operating conditions of the vehicle.It is within the scope of this document to measure the stationary A-weighted sound pressure level during: Measurements at the manufacturing stage Measurements at official testing stations Measurements at roadside testingIt does neither specify a method to check the exhaust sound pressure level when the engine is operated at realistic load nor a method to check the exhaust sound pressure levels against a general noise limit for categories of road vehicles. It provides the means for detecting exhaust system resonances with the potential to affect both exterior and interior sound quality.SAE J2805 provides methods to assess vehicle noise emission consistent with in-use vehicle noise emissions at realistic vehicle loads and speeds.This document incorporates certain provisions of ISO 5130:2019 for measuring the sound level of exhaust systems (see Appendix A). SAE J1492 is updated to include testing of all modes and to clarify procedure applies to all propulsion technologies.This SAE Recommended Practice is designed to check vehicle exhaust noise or simulated exhaust noise against a reference value. However, it has been used by some jurisdictions to support checking against a fixed limit value. This version of SAE J1492 incorporates provisions where the standard may be used by authorities to check against a fixed limit. This recommended practice also incorporates provisions for additional exhaust system configurations and the use of vehicles with driver selectable modes.
Author: Light Vehicle Exterior Sound Level Standards Committee
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
This SAE Standard establishes the test procedure, environment, and instrumentation to be used for measuring the exhaust sound level of passenger cars, multipurpose vehicles, and light trucks under stationary conditions. Measurements are taken under steady-state conditions. In this respect, this procedure differs from ISO 5130 which includes measurements under the dynamic conditions of an engine deceleration. This sound level measurement procedure has been developed as a guide for governmental agencies establishing in-service sound level limitations and enforcement measurement procedures. It is directed at the assessment of vehicle exhaust noise and is not intended to determine maximum vehicle sound levels.Technology changes have occurred that make the SAE J1169 procedure inadequate. SAE J1169 is a legacy test that specifies maximum rated engine speed (MRES) as the test condition. Many modern engines will not allow MRES in neutral and/or have fuel cut-off software that prevents the engine from reaching this target. Additionally, the measurement technology of slow exponential time-averaging characteristic is outdated as compared to the fast exponential time averaging characteristic used in SAE J1492. For these and other reasons, J1169 will be cancelled in favor of J1492, which provides a continuous measure of exhaust system sound level over a range of engine speeds.
Author: United States. Office of Noise Abatement and Control
Publisher:
ISBN:
Category : Automobiles
Languages : en
Pages : 12
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Book Description
Author: United States. National Highway Traffic Safety Administration
Publisher:
ISBN:
Category : Motor vehicles
Languages : en
Pages : 244
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Book Description
Author: Motorcycle Technical Steering Committee
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
This SAE Standard establishes the test procedure, environment, and instrumentation for determining the sound levels of motorcycles under stationary conditions. This test will measure primarily exhaust noise and does not represent the optimum procedure for evaluating total vehicle noise. For this purpose, SAE J331 or SAE J47 is recommended.
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Noise
Languages : en
Pages : 200
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Book Description
Author: Jack M. Fath
Publisher:
ISBN:
Category : Noise
Languages : en
Pages : 96
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Book Description
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Noise
Languages : en
Pages : 172
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Book Description
Author: G Watts
Publisher:
ISBN:
Category :
Languages : en
Pages : 126
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Book Description
