ISO 4106 2026 Motorcycles—Engine test code —Net power

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Motorcycles—Engine test code —

Net power

Motocycles—Code d'essai des moteurs—Puissance nette

Reference number

ISO 4106:2026(en)

International

Standard

ISO 4106

Fifth edition

2026-03

◎ISO 2026

ISO 4106:2026(en)

@ISO 2026

be reproduced or utilized otherwise in any form or by any means,electronic or mechanical,including photocopying,or posting on

the internet or an intranet,without prior written permission.Permission can be requested from either ISO at the address below

or ISO's member body in the country ofthe requester.

ISO copyright office

CP401·Ch.de Blandonnet 8

CH-1214 Vernier,Geneva

Phone:+41227490111

Email:copyright@iso.org

Website: www.iso.org

Published in Switzerland

iii

ISO 4106:2026(en)

Contents Page

Foreword..................................................................................................................................................................... iv

Introduction.................................................................................................................................................................

1 Scope ............................................................................................................................................................... 1

2 Normative references .................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................1

4 Symbols .......................................................................................................................................................... 2

5 Standard reference conditions .................................................................................................................. 3

6 Tests ............................................................................................................................................................... 3

6.1 Genera..................................................................................................................................................3

6.2 Measuring equipment and instrument accuracy...............................................................................3

6.2.1 Torque ..................................................................................................................................... 3

6.2.2 Engine speed.............................................................................................................................3

6.2.3 Fuel flow..................................................................................................................................3

6.2.4 Fuel temperature..................................................................................................................... 3

6.2.5 Engine inlet air temperature.................................................................................................3

6.2.6 Barometric pressure............................................................................................................. 3

6.2.7 Back pressure in exhaust system.......................................................................................... 3

6.2.8 Test room humidity...............................................................................................................4

6.3 Setting and test conditions............................................................................................................... 4

6.3.1 Equipment and auxiliaries................................................................................................... 4

6.3.2 Test conditions .......................................................................................................................6

6.3.3 Test atmospheric conditions............................................................................................... 7

6.4 Test procedure..................................................................................................................................... 7

7Torque,power and specific fuel consumption....................................................................................... 8

7.1 Calculation of measured torque,measured power and specific fuel consumption...................... 8

7.2 Net torque and net power.................................................................................................................. 8

7.2.1 General ................................................................................................................................... 8

7.2.2 Determination of correction factor am ................................................................................. 8

7.2.3 Calculation of net torque and net power.............................................................................. 9

7.3 Corrected net torque and corrected net power.............................................................................. 9

7.3.1 General ................................................................................................................................... 9

7.3.2 Determination of correction factor a............................................................................... 10

7.3.3 Calculation of corrected net torque and corrected net power......................................... 10

8 Test repor....................................................................................................................................................... 10

8.1 Genera............................................................................................................................................... 10

8.2 The description of test repor........................................................................................................... 10

8.2.1 General ................................................................................................................................. 10

8.2.2 Essential characteristics of spark-ignition engines ......................................................... 10

8.2.3 Test conditions during net power measuremen............................................................... 12

8.3 Statement of results ....................................................................................................................... 13

AnnexA(normative) Test method for compression-ignition engines....................................................... 16

Annex B(informative) Example for record form of test fuel specification................................................... 22

Bibliography

.............................................. ………………………………………………………………24

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标签： #ISO #2026 #Motorcycles

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Motorcycles—Enginetestcode—NetpowerMotocycles—Coded'essaidesmoteurs—PuissancenetteReferencenumberISO4106:2026(en)InternationalStandardISO4106Fifthedition2026-03◎ISO2026iiISO4106:2026(en)COPYRIGHTPROTECTEDDOCUMENT@ISO2026Allrightsreserved.Unlessotherwisespecified,orrequiredinthecontextofitsimplementa...

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ISO 4106 2026 Motorcycles—Engine test code —Net power

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