Document ID: chunk:federal_register_of_legislation:F2024C00356:reg:3:p1
Version: federal_register_of_legislation:F2024C00356
Segment Type: reg
Provision Reference: reg 3 (pt 1/18)
Character Range: 396764–399908

3                 That for conditions No. 2, multiplied
                  by a factor of 1.7

              4. Test method

              4.1. For the operation conditions as listed in paragraph 3.2. above, reliable function of the crankcase ventilation system shall be checked.

              5. Method of verification of the crankcase ventilation system

              5.1. The engine's apertures shall be left as found.

              5.2. The pressure in the crankcase shall be measured at an appropriate location. It shall be measured at the dip-stick hole with an inclined-tube manometer.

              5.3. The vehicle shall be deemed satisfactory if, in every condition of measurement defined in paragraph 3.2. above, the pressure measured in the crankcase does not exceed the atmospheric pressure prevailing at the time of measurement.

              5.4. For the test by the method described above, the pressure in the intake manifold shall be measured to within 1 kPa.

              5.5. The vehicle speed as indicated at the dynamometer shall be measured to within 2 km/h.

              5.6. The pressure measured in the crankcase shall be measured to within 0.01 kPa.

              5.7. If in one of the conditions of measurement defined in paragraph 3.2. above, the pressure measured in the crankcase exceeds the atmospheric pressure, an additional test as defined in paragraph 6. below shall be performed if so requested by the manufacturer.

              6. Additional test method

              6.1. The engine's apertures shall be left as found.

              6.2. A flexible bag impervious to crankcase gases and having a capacity of approximately five litres shall be connected to the dipstick hole. The bag shall be empty before each measurement.

              6.3. The bag shall be closed before each measurement. It shall be opened to the crankcase for five minutes for each condition of measurement prescribed in paragraph 3.2. above.

              6.4. The vehicle shall be deemed satisfactory if, in every condition of measurement defined in paragraph 3.2. above, no visible inflation of the bag occurs.

              6.5. Remark

              6.5.1. If the structural layout of the engine is such that the test cannot be performed by the methods described in paragraphs 6.1. to 6.4. above, the measurements shall be effected by that method modified as follows:

              6.5.2. Before the test, all apertures other than that required for the recovery of the gases shall be closed;

              6.5.3. The bag shall be placed on a suitable take-off which does not introduce any additional loss of pressure and is installed on the recycling circuit of the device directly at the engine-connection aperture.

  Type III Test

Annex 7
  Type IV Test

(Determination of evaporative emissions from vehicles with positive-ignition engines)
              1. Introduction
               This annex describes the procedure of the Type IV Test according to paragraph 5.3.4. of this Regulation.
               This procedure describes a method for the determination of the loss of hydrocarbons by evaporation