ISO 8178-4:2020

Reciprocating internal combustion engines — Exhaust emission measurement — Part 4: Steady-state and transient test cycles for different engine applications

Publication date:   Jun 24, 2020

General information

60.60 Standard published   Jun 24, 2020


ISO/TC 70/SC 8 Exhaust gas emission measurement

International Standard

13.040.50   Transport exhaust emissions | 27.020   Internal combustion engines



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This document specifies the test cycles, the test procedures and the evaluation of gaseous and particulate exhaust emissions from reciprocating internal combustion (RIC) engines coupled to a dynamometer. With certain restrictions, this document can also be used for measurements at site. The tests are carried out under steady-state and transient operation using test cycles which are representative of given applications.
This document is applicable to RIC engines for mobile, transportable and stationary use, excluding engines for on-road transport of passengers and goods. It can be applied to engines for non-road use, e.g. for earth-moving machines, generating sets and for other applications. For engines used in machinery covered by additional requirements (e.g. occupational health and safety regulations, regulations for power plants), additional test conditions and special evaluation methods can apply.

Life cycle


ISO 8178-4:2017

ISO 8178-4:2017/DAmd 1


ISO 8178-4:2020
60.60 Standard published
Jun 24, 2020