ECE R28 PDF

Bahn In addition, arrangements must be made ensuring that reflections on the sides of the support and its own vibrations have ecd appreciable effect on the measuring results. In this case, the provisions of paragraph 7. This department may then:. If, after the AWD has been operated for half the number of times prescribed, the sound-level characteristics are no longer the same as before the test, the AWD may be adjusted. The forward edge of the sideguard shall be constructed as follows: The sound made by the audible warning device saudible warning system smultiple audible warning system s fitted to the vehicle type submitted for approval shall be measured by the methods described in Paragraph The approval granted in respect of a vehicle type pursuant to this Regulation may be withdrawn if the requirements laid down in paragraphs 6 and 7 above are not complied with.

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Top audible warning devices AWD 1 supplied with direct or alternating current or compressed air, which are intended for fitting to motor vehicles of categories L3 to L5, M and N, excluding mopeds categories L1 and L2 2 audible signals 3 of motor vehicles listed in 1.

The application for approval of a type of audible warning device shall be submitted by the holder of the trade name or mark or by his duly accredited representative. It shall be accompanied by the following documents, in triplicate, giving the following particulars: a description of the type of audible waning device, paying particular attention to the points mentioned in paragraph 2.

The drawings shall show the place provided for the approval number in relation to the circle of the approval mark. In addition, the application for approval shall be accompanied by two samples of the type of warning device.

The competent authority shall verify the existence of satisfactory arrangements for ensuring effective control of the conformity of production before type approval is granted. Each sample shall have a space of adequate dimensions for the approval mark; this space shall be indicated in the drawing referred to in paragraph 3. Top If the samples submitted for approval conform to the provisions of paragraphs 6.

An approval number shall be assigned to each type approved. Its first two digits at present 00 for the Regulation in its original form shall indicate the series of amendments incorporating the most recent major technical amendments made to the Regulation at the time of issue of the approval.

The same Contracting Party may not assign this number to another type of audible warning device. The same approval number may be assigned to types of warning devices differing only with respect to rated voltage, rated frequency or frequencies or, for the devices mentioned in paragraph 2. Notice of approval or refusal or extension or withdrawn of approval or production definitely discontinued of a type of warning device pursuant to this Regulation shall be communicated to the Parties to the Agreement applying this Regulation by means of a form conforming to the model in annex 1 to the Regulation, and of drawings of the audible warning device supplied by the applicant for approval with the maximum format A.

On every audible warning device which conforms to a type approved under this Regulation, there shall be affixed conspicuously, in an easily accessible place indicated on the approval form, an international approval mark comprising: 4 MARKINGS 4. The approval mark and the additional symbol must be clearly legible and indelible. Annex 3, Section I, to this Regulation gives an example of the arrangement of the approval mark. General Specifications Top The audible warning device shall emit a continuous and uniform sound; its acoustic spectrum shall not vary substantially during its operation.

For warning devices supplied with alternating current, this requirement shall apply only at constant generator speed, within the range specified in paragraph 6. The warning device shall have acoustic characteristics spectral distribution of the acoustic energy, sound pressure level and mechanical characteristics such that it passes, in order indicated, the following tests.

Measurement of the sound characteristics The warning device should, preferably, be tested in an anechoic environment. Alter-natively, it may be tested in a semi-anechoic chamber or in an open space. In this case, precautions shall be taken to avoid reflections from the ground within the measuring area for instance by erecting a set of absorbing screens.

Compliance with the spherical divergence to a limit of 1 dB within a hemisphere of not less than 5 m radius, up to the maximum frequency to be measured, especially in the measuring direction and at the height of the apparatus and the microphone, shall be checked.

The ambient noise level shall be at least 10 dB lower than the sound pressure level to be measured. The device to be tested and the microphone shall be placed at the same height. This height shall be between 1. The axis of maximum sensitivity of the microphone shall coincide with the direction of the maximum sound level of the device.

In the case of devices with several outlets, the distance shall be determined in relation to the plane of the nearest outlet to the microphone. The measurements of the sound pressure levels shall be made with a class 1 precision sound level meter conforming to the specifications of IEC Publication No.

All measurements shall be made using the time constant "F". The measurement of the over-all sound pressure level shall be made using the weighting curve A. The spectrum of the sound emitted shall be measured according to the Fourier transform of the acoustic signal. In every case, only the Fourier transform method shall be regarded as a reference method.

During this test, no other electrical load shall be imposed on the electric generator. The endurance test described in paragraph 6. If a rectified current source is used for the test of an AWD supplied with direct current, when the warning devices are in operation, shall not be more than 0. For AWDs supplied with direct current, the resistance of the connecting leads, expressed in ohms, including terminals and contacts, shall be as close as possible to: 0.

The warning device shall be mounted rigidly, by means of the equipment indicated by the manufacturer, on a support whose mass is at least ten times that of the warning device under test and not less than 30 kg. In addition, arrangements must be made to ensure that reflections on the sides of the support and its own vibrations have no appreciable effect on the measuring results.

In the conditions set out above, the sound-pressure level weighted in accordance with curve A shall not exceed the following values: a dB A for AWDs intended principally for motor cycles with a power less than or equal to 7 kW; b dB A for AWDs intended principally for vehicles of categories M and N, and motor cycles with a power greater than 7 kW.

In addition, the sound-pressure level in the frequency band 1, to 3, Hz shall be greater than that of any component of a frequency above 3, Hz and in any event equal to or greater than: a 95 dB A for AWDs intended principally for motor cycles with a power less than or equal to 7 kW; b dB A for AWDs intended principally for vehicles of categories of M and N, and motor cycles with a power greater than 7 kW. AWDs meeting the sound characteristics mentioned in b may be used on the vehicles mentioned in a.

The specifications indicated above shall also be met by a device subjected to the endurance test referred to in paragraph 6. The time lapse between the moment when the device is actuated and the moment when the sound reaches the minimum value prescribed in paragraph 6. This provision is applicable, inter alia, to pneumatic or electro-pneumatic warning devices. Pneumatic or electro-pneumatic warning devices shall, when operating under the power supply conditions established for the devices by the manufacturers, satisfy the same acoustic requirements as are prescribed for electricallyoperated audible warning devices.

In the case of multiple-tone devices in which each sound-emitting unit is capable of functioning independently, the minimum values specified above shall be obtained when each of the constituent units is operated separately. The maximum value of the over-all sound level shall not be exceeded when all the constituent units are operated simultaneously. Endurance test The AWD shall be supplied with current at the rated voltage and with the connecting lead resistances specified in paragraphs 6.

Each time for one second followed by an interval of four seconds. If the test is made in an anechoic chamber, the chamber shall be large enough to ensure normal dispersal of the heat released by the warning device during the test.

If, after the AWD has been operated half the number of times prescribed, the soundlevel characteristics are no longer the same as before the test, the AWD may be adjusted. After being operated the prescribed number of times, and after further adjustment if necessary, the AWD must pass the test described in paragraph 6.

For warning devices of the electro-pneumatic type, the device may be lubricated with the oil recommended by the manufacturer after every 10, times of operation. Top 6. Any modification of the type of audible warning device shall be notified to the administrative department which granted approval to the type of audible warning device. This department may then: either take the view that the modifications made are not likely to have any appreciable adverse effect, or call for a new report from the technical service responsible for the tests.

Notice of confirmation of the approval with particulars of the modifications, or of refusal of approval shall be communicated to the Parties to the Agreement applying this Regulation, in accordance with the procedure indicated in paragraph 5.

The competent authority issuing the extension of approval shall assign a series number to each communication form drawn up for such an extension. Top 7. AWD approved under this Regulation shall be so manufactured as to conform to the type approved by meeting the requirements set forth in paragraph 6. The authority which has granted type approval may at any time verify the conformity control methods applied in each production facility.

The normal frequency of these verifications shall be once every two years. The approval granted to a type of audible warning device pursuant to this Regulation may be withdrawn if the conditions set forth in paragraph 8. Top 9. The application for approval of a vehicle type with regard to its audible signals shall be submitted by the vehicle manufacturer or by his duly accredited representative.

It shall be accompanied by the following documents, in triplicate, giving the following particulars: a description of the vehicle type with regard to the items mentioned in paragraph A vehicle representative of the vehicle type to be approved shall be submitted to the technical service responsible for the approval tests.

Top If the vehicle type submitted for approval pursuant to this Regulation meets the requirements of paragraphs The same Contracting Party may not assign this number to another vehicle type. Notice of approval or of refusal of approval or extension or withdrawn of approval or production definitely discontinued of a vehicle type pursuant to this Regulation shall be communicated to the Parties to the Agreement applying this Regulation by means of a form conforming to the model in annex 2 to the Regulation, and of drawings supplied by the applicant for approval with maximum format A.

On every vehicle which conforms to a vehicle type approved under this Regulation, there shall be affixed conspicuously, in an easily accessible place indicated on the approval form, an international approval mark 13 APPROVAL If the vehicle conforms to a vehicle type approved, under another other Regulation s annexed to the Agreement, in the same country as that which has granted the approval under this Regulation, the symbol referred to in paragraph The approval mark must be clearly legible and indelible.

The approval mark shall be placed near the plate bearing the characteristics of the vehicle and may also be affixed to this plate. Annex 3, Section II, to this Regulation gives an example of the arrangement of the approval mark. Top The audible warning device fitted on the vehicle shall be of a type approved under this Regulation. Audible warning devices of class II approved under this Regulation in its original form, and therefore not bearing the symbol II in their approval mark, may continue to be fitted to vehicle types submitted for approval pursuant to this Regulation.

The test voltage shall be as specified in paragraph of 6. Top Any modification of the vehicle type shall be notified to the administrative department which granted approval to the vehicle type. This department may then: either take the view that the modifications made are not likely to have any appreciable adverse effect and that in any case the vehicle still meets the requirements; or call for a new report from the technical service responsible for the tests.

Notice of confirmation of approval with particulars of the modifications, or of refusal of approval shall be communicated to the Parties to the Agreement applying this Regulation, in accordance with the procedure indicated in paragraph A vehicle approved under this Regulation shall be so manufactured as to conform to the type approved by meeting the requirements set forth in paragraph The approval granted to a vehicle type pursuant to this Regulation may be withdrawn if the conditions set forth in paragraph Top concerning: 2 Approval granted Approval extended Approval refused Approval withdrawn Production definitely discontinued of a type of audible warning device for motor vehicles pursuant to Regulation No.

Approval No. Extension No. Trade name or mark Type electro-pneumatic, electro-magnetic with resonator disc, electromagnetic horn, etc. Brief description of warning device Supply voltage s Hz 2 Geometrical characteristics internal length and diameter of connecting line between compressor or control and the audible device Submitted for approval on Technical service responsible for approval tests Date of report issued by that service Number of report issued by that service A list of documents contained in the approval file transmitted to the administrative service which has granted approval is annexed to this communication.

Trade name or mark of the vehicle

EVAGRIO PONTICO OBRAS PDF

ECE-Regelungen

Communication concerning the approval or refusal or withdrawal of approval or production definitely discontinued of a type of audible warning device, audible warning system, multiple audible warning system for motor vehicles, pursuant to UN Regulation No. Trade name or mark; 2. Base designation: 2. Principles of operation; 2. Audible warning devices, audible warning systems, multiple audible warning systems with electrical supply: 2. Type of electrical supply direct or alternating current ; 2.

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