ISO 4106-2026【PDF原文+中文翻译版】

原文英文标题：Motorcycles — Engine test code — Net power

中文翻译标题：《摩托车-发动机试验规程-净功率》

LANGUAGES: English+Chinese【英文原文+中文翻译】

This document specifies methods for evaluating the performance of engines designed for motorcycles as defined in ISO 3833, in particular with a view to the presentation of power curves and specific fuel consumption at full load as a function of engine speed, for net power assessment. It is applicable to reciprocating internal combustion engines (spark-ignition or compression-ignition) ‒ excluding free-piston engines ‒ and rotary piston engines, either naturally aspirated or pressure-charged and equipped with either mechanical pressure-charger or turbocharger. Particular specifications for the test of compression-ignition engines are specified in Annex A.

Foreword

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This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 38, Motorcycles and mopeds.

This fifth edition cancels and replaces the fourth edition (ISO 4106:2012), which has been technically revised.

The main changes are as follows:

— the ranges of fuel temperature, engine inlet air temperature, and the applicable range of the correction factor have been expanded;

— engine inlet depression and dry atmospheric pressure have been removed from required measurement items;

— an example of the record form for test fuel specifications has been added;

— transmission component efficiencies of helical and bevel gears have been changed.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.

Introduction

This fifth edition harmonizes some minor differences compared to the other measurement methods as much as possible to improve efficiency.

1   Scope

This document specifies methods for evaluating the performance of engines designed for motorcycles as defined in ISO 3833, in particular with a view to the presentation of power curves and specific fuel consumption at full load as a function of engine speed, for net power assessment. It is applicable to reciprocating internal combustion engines (spark-ignition or compression-ignition) ‒ excluding free-piston engines ‒ and rotary piston engines, either naturally aspirated or pressure-charged and equipped with either mechanical pressure-charger or turbocharger. Particular specifications for the test of compression-ignition engines are specified in Annex A.

2   Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 2710-1 Reciprocating internal combustion engines — Vocabulary — Part 1: Terms for engine design and operation

ISO 15550 Internal combustion engines — Determination and method for the measurement of engine power — General requirements

3   Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 2710-1, ISO 15550 and the following apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp

— IEC Electropedia: available at https://www.electropedia.org/

3.1

net power

power obtained on a test bed at the end of the crankshaft or its equivalent at the corresponding engine speed with the equipment and auxiliaries listed in 6.3.1

3.2

corrected net power

net power (3.1) corrected under the standard reference conditions

3.3

net torque

torque transmitted on a test bed at the end of the crankshaft or its equivalent at the corresponding engine speed with the equipment and auxiliaries listed in 6.3.1

3.4

corrected net torque

net torque (3.3) corrected under the standard reference conditions

3.5

specific fuel consumption

amount of fuel consumed by an engine per unit of power and time

Note 1 to entry: The amount of the lubricants for two-stroke cycle engines is excluded.

3.6

auxiliaries

equipment and devices necessary to make the engine acceptable for service in the intended application