Document ID: chunk:federal_register_of_legislation:F2021C01210:reg:5:p2
Version: federal_register_of_legislation:F2021C01210
Segment Type: reg
Provision Reference: reg 5 (pt 2/5)
Character Range: 115053–118041

from the oil cooler, if fitted, shall be maintained within the limits established by the engine manufacturer.
        5.3.10 An auxiliary regulating system may be used if necessary to maintain the temperatures within the limits specified in paragraphs 5.3.7., 5.3.8. and 5.3.9.
        5.3.11 The fuel shall be one available on the market without any supplementary smoke suppressant additives. In any case of dispute, the reference fuel shall be:
(a) Diesel engines, as defined by CEC */ in CEC-RF-03-A-80;
(b) Positive ignition engines, as defined by CEC-RF-01-A-80.
        5.4  Test procedure
        Measurements shall be taken at a sufficient number of engine speeds to define correctly the power curve between the lowest and the highest engine speeds recommended by the manufacturer. This range of speeds must include the speed of revolution at which the engine produces its maximum power. The average of at least two stabilized measurements is to be determined.
        5.5  Data to be recorded
        Data to be recorded are those indicated in the appendix to this annex.

  6.  POWER CORRECTION FACTORS
        6.1  Definition
        The power correction factor is the coefficient  by which the measured power must be multiplied to determine the engine power under the reference atmospheric conditions specified in paragraph 6.2.
where
        Po is the corrected power (i.e. power under reference atmospheric conditions);
   is the correction factor (  or  )
P is the measured power (test power).

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        */ European Co-ordinating Council for the Development of Performance Tests for Lubricants and Engine Fuels.

6.2.  Reference atmospheric conditions
        6.2.1. Temperature (To ): 298 K (25C)
        6.2.2. Dry pressure (P so ):  99 kPa
        Note: The dry pressure is based on a total pressure of 100 kPa and a water vapour pressure of 1 kPa.
        6.3.  Test atmospheric conditions
        The atmospheric conditions during the test shall be the following:
        6.3.1. Temperature (T)
For positive-ignition engines  288 K <  T <  308 K
For diesel engines              283 K <  T <  313 K
        6.3.2.  Pressure (Ps)
80 kPa < Ps < 110 kPa
        6.4.  Determination of correction factor   or  1/
        6.4.1. Naturally aspirated or supercharged positive-ignition engine -
Factor  :
The correction factor  is obtained by applying the formula:
 2/
where
        Ps is the total dry atmospheric pressure in kilopascals (kPa);
        that is to say, the total barometric pressure minus water vapour pressure:
        T is the absolute temperature in Kelvins (K) of the air drawn in by the engine.
        Conditions to be complied with in the laboratory
        For a test to be valid, the correction factor must be such that
0.93 < < 1.07.
        If these limits are exceeded, the corrected value obtained shall be given and the test conditions (temperature and pressure) precisely stated in the test report.

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    l/ The tests may