ISO 8178-7:2015 レシプロ内燃エンジン—排気ガス測定—パート7：エンジンファミリーの決定 | ページ 2

Foreword

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The committee responsible for this document is ISO/TC 70, Internal combustion engines, Subcommittee SC 8, Exhaust gas emission measurement.

This second edition cancels and replaces the first edition (ISO 8178-7:1996), which has been technically revised.

ISO 8178 consists of the following parts, under the general title Reciprocating internal combustion engines — Exhaust emission measurement:

• Part 1: Test-bed measurement of gaseous and particulate emissions
• Part 2: Measurement of gaseous and particulate exhaust emissions under field conditions
• Part 3: Definitions and methods of measurement of exhaust gas smoke under steady-state conditions
• Part 4: Steady-state test cycles for different engine applications
• Part 5: Test fuels
• Part 6: Report of measuring results and test
• Part 7: Engine family determination
• Part 8: Engine group determination
• Part 9: Test cycles and test procedures for test bed measurement of exhaust gas smoke emissions from compression ignition engines operating under transient conditions
• Part 10: Test cycles and test procedures for field measurement of exhaust gas smoke emissions from compression ignition engines operating under transient conditions

Introduction

Unlike engines for on-road applications, engines for non-road use are made in a much wider range of power output and configuration and are used in a great number of different applications.

The objective of ISO 8178 is to rationalize the test methods for non-road engines in order to simplify and make more cost-effective drafting of legislation, development of engine specifications, and certification of engines to control gaseous and particulate emissions.

In order to achieve the objectives, ISO 8178 embraces four concepts as follows:

• a) grouping of engine applications in order to reduce the number of test cycles as defined in ISO 8178-4;
• b) use of observed brake power as defined in ISO 8178-4 as the basis for the expression of specific emission levels;
• c) incorporation of “engine family” concept, in which engines with similar emission characteristics and design can be represented by an engine within the family;
• d) incorporation of “engine group” concept, which addresses the modification and adjustment of engines (see ISO 8178-8).

In this part of ISO 8178, the engine family concept is elaborated.

The engine family concept provides the possibility of reducing the number of engines to be submitted for type approval testing, while providing safeguards for the parties involved that all engines within the family will comply with the approval requirements.

1 Scope

This part of ISO 8178 specifies the parameters to be applied for the determination of which engine specifications may be included in an engine family and for the selection of the parent engine of the family.

This part of ISO 8178 is applicable to reciprocating internal combustion engines for land, rail traction, and marine use, excluding engines for motor vehicles primarily designed for on-road operation. It may be applied to engines for power production and/or propulsion, e.g. agricultural equipment, road construction and earth moving machines, industrial trucks, generating sets, etc.

2 Terms and definitions

For the purposes of this document, the following terms and definitions apply.