3.

TEST SPECIFICATIONS 3.1. General The components liable to affect the emission of gaseous pollutants shall be so designed, constructed and assembled as to enable the vehicle, in normal use, despite the vibration to which it may be subjected, to comply with the requirements of this Directive. 3.2. Description of tests 3.2.1. The vehicle shall be subjected, according to its weight category, to Types I, II and III tests, as specified below: 3.2.2.1. Type I test (verifying the average emission of gaseous pollutants in a congested urban area after a cold start). 3.2.1.1.1. This test shall be carried out on all vehicles referred to in Article 1 whose maximum weight does not exceed 3 7 5 metric tons. 3.2.1.1.2. The vehicle shall be placed on a dynamometer bench equipped with a brake and a flywheel. A test lasting a total of thirteen minutes and comprising four cycles shall be carried out without interruption. Each cycle shall comprise 15 phases (idling, acceleration, steady speed, deceleration, etc.). During the test the exhaust gases shall be collected in one or more bags. The gases shall be analysed and their volume measured at the end of the filling period. 3.2.1.1.3. The test shall be carried out by the procedure described in Annex III. The methods used to collect and analyse the gases shall be those laid down. Other methods may be approved if it is found that they yield equivalent results. 3.2.1.1.4. The mass of the carbon monoxide and the mass of the hydrocarbons obtained in the test must be less, for a vehicle of given reference weight, than the amounts shown in the table below: >PIC FILE= "T0002121"> 3.2.1.2. Type II test (carbon-monoxide emission test at idling speed). 3.2.1.2.1. This test shall be carried out on all vehicles referred to in Article 1. 3.2.1.2.2. The carbon-monoxide content by volume of the exhaust gases emitted with the enging at idling speed must not exceed 4 7 5 %. 3.2.1.2.3. This content shall be checked through a test carried out in accordance with the procedure described in Annex IV. 3.2.1.3. Type III test (verifying emissions of crankcase gases). 3.2.1.3.1. This test shall be carried out on all vehicles referred to in Article 1 with the exception of those having a two-stroke engine with compression in the crankcase. 3.2.1.3.2. The mass of the hydrocarbons contained in the crankcase gases which are not recycled by the engine must be less than 0 7 15 % of the mass of the fuel consumed by the engine. 3.2.1.3.3. This mass shall be checked through a test carried out in accordance with the procedure described in Annex V. 3.2.2. As a general rule conformity of production models, with regard to limitation of the emission of gaseous pollutants from the engine, shall be verified on the basis of the description in the communication given in Annex VII and, where necessary, of all or some of the tests of Types I, II and III referred to in item 3.2. However: 3.2.2.1. In a Type I test carried out on a vehicle taken from the series the collected mass of the carbon monoxide and the collected mass of the hydrocarbons shall not exceed the values for L1 and L2 respectively given in the following table: >PIC FILE= "T0002122">

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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.