Document ID: chunk:federal_register_of_legislation:F2021C01210:reg:6:p10
Version: federal_register_of_legislation:F2021C01210
Segment Type: reg
Provision Reference: reg 6 (pt 10/24)
Character Range: 26954–29722

case the engine still complies with the requirements,  or
        7.1.2 Require a further test report from the technical service responsible for conducting the test.
        7.2 For the purposes of this Regulation with regard to the emission of visible pollutants the modifications may be classified as follows:
(1) Modifications which require a new approval with tests.
(2)  Modifications which require a new approval without tests.
(3)  Modifications which may require new tests however without new approval.
(4)  Modifications which do not require complementary tests or new approvals.
        The above classifications (1), (2), (3) and (4) are marked on each line of the corresponding characteristics in annex 1.
        7.3 Irrespective of these classifications in paragraph 7.2 a new approval, with tests, i.e. Classification (1), will automatically be required unless the engine also respects the following conditions:
           Maximum rated speed not greater than 100 per cent nor less than 75 per cent of that of the engine in the approval test,
           Minimum rated speed not less than that of the engine in the approval test,
           Torque rating not greater than 100 per cent, nor less than 70 per cent of that of the engine at that speed in the approval test,
           Steady state absorption values are not greater than 1.1 times the values obtained in the approval test and do not exceed the prescribed limits in annex 7,
           Exhaust back pressure not greater than that of the engine in the type approval test,
           Exhaust system volume does not differ by more than 40 per cent,
           Intake depression not greater than that of the engine in the type approval test,
           Moment of inertia of a new combined flywheel and transmission is within 15 per cent of the engine flywheel and transmission system approved.
           Note:   In all cases the engine in the approval test means "an engine representative of the type to be approved" as defined in paragraph 3. 3.
        7.4 If the manufacturer requests to cover the range of de-rated and de-speeded engines allowed for in paragraph 7.3 of Part I of this Regulation, tests shall also be carried out over the speed range defined in paragraph 2.2 of annex 5 with the engine reset to give 90 per cent, 80 per cent and 70 per cent of the full power. If the engine is de-speeded then the minimum speed defined in paragraph 2.2 of annex 5 to this Regulation shall be calculated from the derivative with the lowest maximum power speed. If the engine manufacturer desires to have the visible pollutants measured over a smaller range of torque and/or speed than is allowed by paragraph 7.3 of Part I of the Regulation, then the approval of the engine type will be for the