ANNEX IV

Council Directive 70/220/EEC of 20 March 1970 on the approximation of the laws of the Member States relating to measures to be taken against air pollution by gases from positive-ignition engines of motor vehicles · European Union

TYPE II TEST (Carbon-monoxide emission test at idling speed) Procedure for the Type II test specified in item 3.2.12 of Annex I 1. CONDITIONS OF MEASUREMENT 1.1. The fuel shall be the reference fuel whose specifications are given in Annex VI. 1.2. The carbon-monoxide content by volume shall be measured immediately after the fourth cycle of the Type I test, with the engine at idling speed. 1.3. In the case of vehicles with manual or semi-automatic transmission gearboxes the test shall be carried out with the gear lever in the "neutral" position and with the clutch engaged. 1.4. In the case of vehicles with automatic transmission gearboxes the test shall be carried out with the gear selector in the "zero" or "parking" position. 2. SAMPLING OF GASES 2.1. The sampling probe shall be placed in the pipe connecting the vehicle exhaust with the sampling bag and as close as possible to the exhaust. 2.2. In order to take account of possible dilution of the exhaust gases with air, the content by volume of carbon monoxide (T1) and of carbon dioxide (T2) shall be measured, and the content by volume (T) to be compared with the prescribed limit shall be calculated by the formula >PIC FILE= "T0002130">

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