Document ID: chunk:federal_register_of_legislation:F2024L00089:reg:800:p10
Version: federal_register_of_legislation:F2024L00089
Segment Type: reg
Provision Reference: reg 800 (pt 10/16)
Character Range: 56546–59688

navigation-systems shall be switched off.

              Before the measurements are started, the vehicle shall be brought to its normal operating conditions.

              3.2.2. Battery state of charge

              If so equipped, propulsion batteries shall have a state-of-charge sufficiently high to enable all key functionalities according to the manufacturer's specifications. Propulsion batteries shall be within their component-temperature window to enable all key functionalities that could reduce vehicle sound emissions. Any other type of rechargeable energy storage system shall be ready to operate during the test.

              3.2.3. Multi-mode operation

              If the vehicle is equipped with multiple driver selectable operating modes, the mode which provides the lowest sound emission during the test conditions of paragraph 3.3. shall be selected.

              When the vehicle provides multiple operating modes that are automatically selected by the vehicle, it is the responsibility of the manufacturer to determine the correct manner of testing to achieve the minimum sound emission.

              In cases where it is not possible to determine the vehicle operating mode providing the lowest sound emission, all modes shall be tested and the mode giving the lowest test result shall be used to report the vehicle sound emission in accordance with this Regulation.

              3.2.4. Test mass of vehicle

              Measurements shall be made on vehicles at mass in running order with an allowable tolerance of 15 per cent.

              3.2.5. Tyre selection and condition

              The tyres fitted to the vehicle during testing are selected by the vehicle manufacturer, and shall correspond to one of the tyre sizes and types designated for the vehicle by the vehicle manufacturer.

              The tyres shall be inflated to the pressure recommended by the vehicle manufacturer for the test mass of the vehicle.

              3.3. Operating conditions

              3.3.1. General

              For each operating condition, the vehicle can be tested either indoor or outdoor.

              For constant speed and reversing tests the vehicle may be tested either in motion or in simulated operating condition. For simulated vehicle operation, signals shall be applied to the vehicle to simulate actual in-use operation.

              If the vehicle is equipped with an internal combustion engine, it shall be turned off.

              3.3.2. Constant speed tests

              These tests are conducted with the vehicle in forward motion or with the vehicle speed simulated by an external signal to the AVAS with the vehicle in standstill condition.

              3.3.2.1. Constant speed tests in forward motion

              For a vehicle tested in an outdoor facility, the path of the centreline of the vehicle shall follow line CC' as closely as possible with constant speed vtest throughout the entire test. The front plane of the vehicle shall pass from the line AA' at the start of the test and the rear plane of the vehicle shall pass from the line BB' at the end of the