1、 _ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising ther
2、efrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2015 SAE International All rights reserved. No part of this
3、publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-49
4、70 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J2805_201511 SURFACE VEHICLE STANDARD J2805 NOV2015 Issued 2008-10 Revised 2015-
5、11 Superseding J2805 OCT2008 Measurement of Noise Emitted by Accelerating Road Vehicles RATIONALE This procedure has been updated to align with modifications to the ISO 362-2015 standard. This Surface Vehicle Standard was developed to provide a method to measure the noise emission of road vehicles c
6、onsistent with actual in-use urban vehicle noise emission. This document was further developed to provide a performance based and technology neutral test standard to reflect the development of engine and propulsion technologies that cannot be correctly tested under existing SAE Standards. FOREWORD T
7、his SAE Standard is based on ISO 362-1:2015 with additional clarifications based on review of ISO 362-1:2015 by the SAE Light Vehicle Exterior Noise Committee and editorial changes to bring the document into alignment with SAE editorial standards. Evaluation of ISO 362-1:2015 was conducted by the SA
8、E Light Vehicle Exterior Noise Committee in 2015. TABLE OF CONTENTS 1. SCOPE 2 2. REFERENCES 3 2.1 Applicable Documents 3 2.2 Related Publications . 3 3. DEFINITIONS . 4 4. SYMBOLS AND ABBREVIATED TERMS 8 5. SPECIFICATION OF THE ACCELERATION FOR VEHICLES OF CATEGORIES M1 AND M2 HAVING A MAXIMUM AUTH
9、ORIZED MASS NOT EXCEEDING 3500 KG, AND OF CATEGORY N1, AND OF CATEGORY N2 DERIVED FROM N1 . 10 5.1 General 10 5.2 Calculation of Acceleration . 11 5.3 Calculation of the Target Acceleration 12 5.4 Calculation of the Reference Acceleration 12 5.5 Partial Power Factor kp. 13 SAE INTERNATIONAL J2805 NO
10、V2015 Page 2 of 37 6. INSTRUMENTATION 13 6.1 Instruments for Acoustical Measurement 13 6.2 Instrumentation for Speed Measurements 14 6.3 Meteorological Instrumentation . 14 7. ACOUSTICAL ENVIRONMENT, METEOROLOGICAL CONDITIONS, AND BACKGROUND NOISE . 14 7.1 Test Site 14 7.2 Meteorological Conditions
11、. 16 7.3 Background Noise . 16 8. TEST PROCEDURES . 16 8.1 Microphone Positions 16 8.2 Conditions of the Vehicle 16 8.3 Operating Conditions 19 8.4 Measurement Readings and Reported Values . 26 9. TEST REPORT . 27 10. NOTES 28 10.1 Marginal Indicia . 28 Appendix A 29 Appendix B 34 Table 1 Symbols an
12、d abbreviations . 8 Table 2 Correction applied to individual measured test value . 16 Table 3 Test mass MT 17 Figure A1 Flow chart for computation of L URBAN . 29 Figure A2 Flow chart 1 of 2 for gear selection using locked gears 30 Figure A3 Flow chart 2 of 2 for gear selection using locked gears 31
13、 Figure A4 Flow chart for determining proper acceleration and L WOT REP using unlocked gears 33 Figure B1 Flow chart for selection of vehicle test criteria 34 1. SCOPE This SAE Standard is equivalent to ISO 362-1:2015 and specifies an engineering method for measuring the noise emitted by road vehicl
14、es of categories M and N under typical urban traffic conditions. It excludes vehicles of category L1, L2, L3, L4, and L5. The specifications are intended to reproduce the level of noise generated by the principal noise sources during normal driving in urban traffic. The method is designed to meet th
15、e requirements of simplicity as far as they are consistent with reproducibility of results under the operating conditions of the vehicle. The test method requires an acoustical environment that is obtained only in an extensive open space. Such conditions are usually provided for during: - measuremen
16、ts of vehicles for regulatory certification and/or type approval - measurements at the manufacturing stage, and - measurements at official testing stations SAE INTERNATIONAL J2805 NOV2015 Page 3 of 37 NOTE 1: The results obtained by this method give an objective measure of the noise emitted under th
17、e specified conditions of test. It is necessary to consider the fact that the subjective appraisal of the noise annoyance of different classes of motor vehicles is not simply related to the indications of a sound measurement system. As annoyance is strongly related to personal human perception, phys
18、iological human conditions, culture, and environmental conditions there is a large variation and it is therefore not useful as a parameter to describe a specific vehicle condition. NOTE 2: Spot checks of vehicles chosen at random are rarely made in an ideal acoustical environment. If measurements ar
19、e carried out on the road in an acoustical environment that does not fulfill the requirements stated in this document, the results obtained may deviate appreciably from the results obtained using the specified conditions. 2. REFERENCES 2.1 Applicable Documents The following publications form a part
20、of this specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1 SAE Publication Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970
21、(outside USA), www.sae.org. SAE J1349 Engine Power Test Code - Spark Ignition and Compression IgnitionNet Power Rating 2.1.2 ISO Publications Available at http:/webstore.ansi.org/ ISO 362-1:2015 Measurement of noise emitted by accelerating road vehiclesEngineering methodPart 1: M and N categories IS
22、O 10844:2014 Acoustics - Specification of test tracks for measuring noise emitted by road vehicles and their tyres 2.1.3 IEC Publications Available from International Electrotechnical Commission, 3, rue de Verambe, P.O. Box 131, 1211 Geneva 20, Switzerland, Tel: +41-22-919-02-11, www.iec.ch. IEC 609
23、42:2003 Electroacoustics - Sound calibrators IEC 61672-1:2002 Electroacoustics - Sound level meters - Part 1: Specifications 2.2 Related Publications The following publications are provided for information purposes only and are not a required part of this SAE Technical Report. 2.2.1 SAE Publications
24、 Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. SAE J366 Exterior Sound Level for Heavy Trucks and Buses SAE J986 Sound Level for Passenger Cars and Light Trucks SAE J1470 M
25、easurement of Noise Emitted by Accelerating Highway Vehicles SAE INTERNATIONAL J2805 NOV2015 Page 4 of 37 3. DEFINITIONS 3.1 Vehicle Mass Definitions Mass definitions in this document refer to ISO 1176 and ISO 2416. 3.1.1 Curb Mass Complete shipping mass of a vehicle fitted with all equipment necess
26、ary for normal operation plus the mass of the following elements for M1, N1, and M2 having a maximum authorized mass not exceeding 3500 kg: lubricants, coolant (if needed), washer fluid, fuel (tank filled to at least 90% of the capacity specified by the manufacturer), other equipment if included as
27、basic parts for the vehicle such as: Spare wheel(s), wheel chocks, fire extinguisher(s), spare parts, and tool kit. The definition of curb mass may vary from country to country, but in this document it refers to the definition contained in ISO 1176. 3.1.2 Maximum Authorized Mass Curb mass plus the m
28、aximum authorized payload. 3.1.3 Unladen Vehicle Mass Nominal mass of a complete N2, N3, or M2 vehicle having a maximum authorized mass greater than 3500 kg, or an M3 vehicle as determined by the following conditions: a. mass of the vehicle includes the bodywork and all factory-fitted equipment, ele
29、ctrical, and auxiliary equipment for normal operation of the vehicle, including liquids, tools, fire extinguisher, standard spare parts, chocks, and spare wheel, if fitted b. the fuel tank is filled to at least 90 percent of rated capacity and the other liquid containing systems (except those for us
30、ed water) are filled to 100 percent of the capacity specified by the manufacturer 3.1.4 Driver Mass Nominal mass of a driver. 3.1.5 Mass in Running Order Nominal mass of a complete N2, N3 or M2 vehicle having a maximum authorized mass greater than 3500 kg, or an M3 vehicle as determined by the follo
31、wing conditions: a. the mass is taken as the sum of the unladen vehicle mass and the drivers mass b. in the case of category M2 and M3 vehicles that include seating positions for additional crewmembers, their mass is incorporated in the same way and equal to that of the driver Drivers mass is calcul
32、ated in accordance with ISO 2416 3.1.6 Maximum Axle (group of axles) Capacity Permissible mass corresponding to the maximum mass to be carried by the axle (group of axles) as defined by the vehicle manufacturer, not exceeding the axle manufacturers specifications. SAE INTERNATIONAL J2805 NOV2015 Pag
33、e 5 of 37 3.1.7 Unladen Axle (group of axles) Load Actual mass carried by the axle (group of axles) in an unladen condition. NOTE: The unladen vehicle mass is equal to the sum of the unladen axles (group of axles) load. 3.1.8 Extra Loading Mass which is added to the unladen vehicle mass. 3.1.9 Laden
34、 Axle (group of axles) Load Actual mass carried by the axle (group of axles) in a laden condition. 3.2 Power to Mass Ratio Index, PMR Dimensionless quantity used for the calculation of acceleration according to the equation: 1000=tnmPPMR(Eq. 1) where PMR is a dimensionless quantity Pnis the numerica
35、l value of total engine power, expressed in kilowatts mtis the numerical value of the test mass, expressed in kilograms 3.2.1 Total Engine Power Sum of all power from available propulsion sources. 3.3 Rated Engine Speed, S Engine speed at which an internal combustion engine develops its rated maximu
36、m net power as stated by the manufacturer. If the rated maximum net power is reached at several engine speeds, S used in this part is the highest engine speed at which the rated maximum net power is reached. NOTE: SAE J1349 provides a test method to establish rated engine speed. 3.4 Vehicle Categori
37、es 3.4.1 Category L Motor vehicles with fewer than four wheels United Nations Economic Commission for Europe (UNECE) document TRANS/WP.29/78/Rev.1/Amend.4 (26 April 2005) extended the L category to four-wheeled vehicles as defined by L6 and L7. 3.4.1.1 Category L1 and L2 Mopeds SAE INTERNATIONAL J28
38、05 NOV2015 Page 6 of 37 3.4.1.2 Category L3 Two-wheeled motor vehicles with an engine cylinder capacity greater than 50 cm3or maximum speed greater than 50 km/h. 3.4.1.3 Category L4 Three-wheeled motor vehicles with an engine cylinder capacity greater than 50 cm3or maximum speed greater than 50 km/h
39、, the wheels being attached asymmetrically along the longitudinal vehicle axis. 3.4.1.4 Category L5 Three-wheeled motor vehicles with an engine cylinder capacity greater than 50 cm3or maximum speed greater than 50 km/h, having a gross vehicle mass rating not exceeding 1,000 kg, and wheels attached a
40、symmetrically along the longitudinal vehicle axis. 3.4.1.5 Category L6 Four-wheeled motor vehicles whose unladen mass is not more than 350 kg, not including the mass of the batteries in the case of electric vehicles, whose maximum design speed is not more than 45 km/h and whose engine cylinder capac
41、ity does not exceed 50 cm3for spark (positive) ignition engines, or whose maximum net power output does not exceed 4 kW in the case of other internal combustion engines, or whose maximum continuous rated power does not exceed 4 kW in the case of electric engines. 3.4.1.6 Category L7 Four-wheeled mot
42、or vehicles, other than those classified as category L6, whose unladen mass is not more than 400 kg (550 kg for vehicles intended for carrying goods), not including the mass of the batteries in the case of electric vehicles, and whose maximum continuous rated power does not exceed 15 kW. 3.4.2 Categ
43、ory M Power driven vehicles having at least four wheels and used for the carriage of passengers. 3.4.2.1 Category M1 Vehicles used for the carriage of passengers and comprising no more than eight seats in addition to the drivers seat. 3.4.2.2 Category M2 Vehicles used for the carriage of passengers
44、and comprising more than eight seats in addition to the drivers seat and having a maximum mass not exceeding 5000 kg. NOTE: In this definition, “maximum mass“ is equivalent to “maximum authorized mass“ used elsewhere in this document. 3.4.2.3 Category M3 Vehicles used for the carriage of passengers
45、and comprising more than eight seats in addition to the drivers seat and having a maximum mass exceeding 5000 kg. NOTE: In this definition, “maximum mass“ is equivalent to “maximum authorized mass“ used elsewhere in this document. 3.4.2.4 Incomplete Vehicle Category of M2 and M3 Incomplete vehicles
46、with just chassis rails or tube assembly, power train, and axles, which is intended to be completed with bodywork, customized to the needs of the transporter operator. SAE INTERNATIONAL J2805 NOV2015 Page 7 of 37 3.4.3 Category N Power driven vehicles having at least four wheels and used for the car
47、riage of goods. 3.4.3.1 Category N1 Vehicles used for the carriage of goods and having a maximum authorized mass not exceeding 3500 kg. 3.4.3.2 Category N2 Vehicles used for the carriage of goods and having a maximum authorized mass exceeding 3500 kg but not exceeding 12000 kg. 3.4.3.3 Category N3 V
48、ehicles used for the carriage of goods and having a maximum authorized mass exceeding 12000 kg. 3.5 Reference Point Point depending on the design and category of the vehicle. 3.5.1 Reference Point for Category M1 and N1 Vehicles and M2 having a maximum authorized mass not exceeding 3500 kg. Point on
49、 the Vehicle as Follows: for front engine vehicles, it is the front end of the vehicle for mid-engine vehicles, it is the center of the vehicle for rear engine vehicles, it is the rear end of the vehicle 3.5.2 Reference Point for Category M2 having a maximum authorized mass exceeding 3500 kg, M3, N2 and N3 Vehicles. Point on the Vehicles as Follows: for front engine vehicles, it is the front end of the vehicl
