3.4.2. Diluted exhaust gas (mandatory for ETC, optional for ESC)

Directive 2005/55/EC of the European Parliament and of the Council of 28 September 2005 on the approximation of the laws of the Member States relating to the measures to be taken against the emission of gaseous and particulate pollutants from compression-ignition engines for use in vehicles, and the emission of gaseous pollutants from positive-ignition engines fuelled with natural gas or liquefied petroleum gas for use in vehicles (Text with EEA relevance) · European Union

The exhaust pipe between the engine and the full flow dilution system shall conform to the requirements of Annex V, Section 2.3.1, EP. The gaseous emissions sample probe(s) shall be installed in the dilution tunnel at a point where the dilution air and exhaust gas are well mixed, and in close proximity to the particulates sampling probe. For the ETC, sampling can generally be done in two ways: the pollutants are sampled into a sampling bag over the cycle and measured after completion of the test; the pollutants are sampled continuously and integrated over the cycle; this method is mandatory for HC and NOx.

← sec_3_4_1__para__3 · All articles · sec_3_4_2__para →

Source: EUR-Lex (Cellar) · retrieved 2026-11-01 · Text as adopted (Official Journal); later amendments are not incorporated in this text.