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1、BRITISH STANDARD AUTOMOBILE SERIES CONFIRMED APRIL 1987 BS AU 40-4a:1966 Incorporating Amendment No. 1 Specification for Motor vehicle lighting and signalling equipment Part 4a: Sealed beam headlamps UDC 629.113.018:654.912.8:629.113.06:628.9 Licensed Copy: London South Bank University, London South
2、 Bank University, Sat Dec 09 01:52:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 40-4a:1966 This British Standard, having been approved by the Illumination Industry Standards Committee and endorsed by the Chairman of the Engineering Divisional Council, was published under the authority of the
3、General Council on 27 April 1966 BSI 02-2000 The following BSI references relate to the work on this standard: Committee references LGE/6, LGG/6/3 Draft for comment D64/1958 ISBN 0 580 34553 X Co-operating organizations The Illumination Industry Standards Committee under whose supervision this Briti
4、sh Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Association of Public Lighting Engineers* British Electrical and Allied Manufacturers Association British Glass Industry Research Association British Railways
5、Board* Electric Lamp Industry Council* Electric Light Fittings Association* Electricity Council, the Generating Board and the Area Boards in England and Wales* Gas Council Glass Manufacturers Federation Illuminating Engineering Society* Independent Lamp Manufacturers Export Group* Institution of Ele
6、ctrical Engineers* Institution of Gas Engineers Institution of Municipal Engineers London Transport Board* Medical Research Council Ministry of Aviation* Ministry of Defence, Navy Department* Ministry of Housing and Local Government Ministry of Labour (H.M. Factory Inspectorate) Ministry of Public B
7、uilding other parts are: Part 1: Side, rear, parking and stop lamps, and direction indicators; Part 2: Reflex reflectors for vehicles, including cycles; Part 3: Headlamps with prefocused filament lamps (in course of preparation); Part 5: Rotating beacons (in course of preparation). It will be seen t
8、hat compliance with this specification is checked by the testing of samples from batches of units. The statistical basis for the sampling system is explained in Appendix A to the standard. All materials and components used in the construction of these units are required to comply with relevant Briti
9、sh Standards. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This docum
10、ent comprises a front cover, an inside front cover, pages i and ii, pages 1 to 13 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank
11、University, London South Bank University, Sat Dec 09 01:52:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 40-4a:1966 BSI 02-20001 Section 1. General 1 Scope This standard specifies requirements for 12 volt sealed beam headlamp units for use on vehicles, and tests for photometric properties, vis
12、ual aim, current, life and resistance to thermal shock. NOTEIn general, the inch dimensions given in this specification are the standard. Where dimensions are given in both systems, the first figure is the standard and the second is an approximate conversion. For accurate conversions reference shoul
13、d be made to BS 350, “Conversion factors and tables”. 2 Definitions For the purposes of this specification the following definitions apply: 2.1 mechanically aimable sealed beam units a sealed unit having three pads on the face of the lens, pre-aimed during manufacture to form an aiming plane NOTEThe
14、 unit is pre-aimed during manufacture to form an aiming plane normal to the vehicle axis when the beam is correctly aimed. 2.2 main (driving or upper) beam a beam of light intended primarily for distant illumination of the road, when no other vehicle is approaching 2.3 dipped (meeting or lower) beam
15、 a beam of light intended for illumination of the road ahead of the vehicle when meeting other road users 2.4 7-inch sealed beam unit a unit 7 inches in diameter having two filaments, one providing a main beam and the other a dipped beam 2.5 5#-inch sealed beam unit a unit 5# inches in diameter. Typ
16、e 1 has a single filament which contributes to the main beam and Type 2 has two filaments, one of which contributes to the main beam and the other provides the dipped beam 2.6 7-inch two-headlamp system two similar 7 inch sealed beam units used together on a vehicle 2.7 four-headlamp system four uni
17、ts used together on a vehicle and lit to provide the main beam, two units only being lit to provide the dipped beam NOTETwo systems are employed at present. The first uses four 5# inch units, two being Type 1 and two Type 2 and the second system is a mixed one using two 7 inch units and two 5# inch
18、(Type 1) units. 2.8 batch all the lamps of one type put forward at one time for acceptance 3 Marking The lamp shall be legibly and durably marked with the following information: a) Nominal voltage. b) Nominal wattage. c) Trade mark. d) Where appropriate, a mark indicating the rule-of-the-road. e) Wi
19、th the number of this British Standard, i.e. BS AU 40. NOTEThe mark BS AU 40 on or in relation to the product is a claim by the manufacturer that it complies with the requirements of the standard. The British Standards Institution is the owner of a registered certification trade mark. This is shown
20、below, enclosed in the words “Approved to British Standard”. This mark can be used only by manufacturers licensed under the certification mark scheme operated by the BSI. The presence of this mark on or in relation to a product is an assurance that the goods have been produced to comply with the req
21、uirements of the British Standard under a system of supervision, control and testing operated during manufacture and including periodical inspection at the manufacturers works in accordance with the certification mark scheme of the BSI. Further particulars of the terms of licence may be obtained fro
22、m the Director, British Standards Institution, 2, Park Street, London, W.1. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 40-4a:1966 2 BSI 02-2000 Section 2. Tests 4 Sampling and testing procedure The u
23、nits for testing shall be selected so as to ensure proper representation of the batch, as follows: a) Method of sampling. i) A batch of 1 000 units or less. A. A batch packed in 10 or less containers. Units shall be selected from each container. B. A batch packed in more than 10 containers. Units sh
24、all be selected from at least one half of the total number of containers, with a minimum of 10. ii) A batch of more than 1 000 units. Lamps shall be selected as far as possible from one third of the number of containers, with a maximum of 10. b) Tests. i) For single filament units. 15 shall be selec
25、ted from the batch, 10 units shall be tested in accordance with Clauses, 3, 5, 7 and 10. The remaining 5 units shall be tested in accordance with Clauses 6, 8, and 9. ii) For double filament units. 25 shall be selected from the batch, 10 of these shall be tested in accordance with Clauses 3, 5 and 7
26、. 20 of these, including the 10 referred to above, shall be tested in accordance with Clause 10, 10 being tested on the main beam filament and 10 on the dipped beam filament. The remaining 5 units shall be tested in accordance with Clauses 6, 8 and 9. 5 Dimensions The units shall comply with the dim
27、ensions given in Figure 1, Figure 2 or Figure 3 as appropriate. 6 Thermal shock The higher-wattage filament shall be operated for five minutes in the normal-operating position of the unit at 14 volts. The unit shall then be quickly immersed, lens first, in water at 15 C until cool. After this test t
28、here shall be neither evidence of moisture in the unit nor sign of failure in the glass. 7 Current limits The units shall be aged at the life-test voltage given in Table 1 to Table 7 as appropriate for at least 30 minutes. The current passed shall then be measured with the specified voltage applied
29、to the terminals of the unit. 8 Photometric requirements and test Following the ageing prescribed in Clause 7 the photometric test voltage (given in the appropriate table) shall then be applied to the terminals of the unit. The units shall be mounted in such a way that the aiming plane is perpendicu
30、lar to a line through the photo-cell and centre of the unit. This specifies the HV point (see Note 2 below). The light intensities from a unit mounted as detailed above, when measured at 60 ft (18.3 m) from the unit face shall comply with the values given in the appropriate table. NOTE 1A tolerance
31、of ! is permissible for any test point. NOTE 2In locating the test points, the line formed by the intersection of a vertical plane through the lamp axis with the test screen is designated as V. The line formed by the intersection of a horizontal plane through the unit centre and the test screen is d
32、esignated as H. The point at the intersection of these two lines is designated as HV. The other points on the screen are designated by similar symbols to indicate the number of degrees of arc above or below H and the number of degrees of arc to the left or right of V for an observer facing the scree
33、n, for example, 4D3L is a point 4 degrees below H and 3 degrees to the left of V, and 1UV is a point 1 degree above H in the median vertical plane. 9 Visual aim When the unit is mounted as in Clause 8, it shall be possible for the high intensity zone of the main beam of 7 inch and 5# inch Type 1 uni
34、ts to be set by three experienced observers to within maximum vertical and horizontal deviations of 0.2 and 0.4 degrees respectively at a distance of 25 ft (7.6 m). 10 Life When mounted in the position of normal use the units shall be tested on an a.c. supply at the life test voltage given in the ap
35、propriate table, at a nominal frequency of 50 c/s. The momentary fluctuations of the test voltage during the test shall not exceed 1 per cent and there shall be no sensible departure of the average value throughout the test from the specified value. Lamps shall be switched off twice daily for period
36、s of not less than 15 minutes, such periods not being considered as part of the life of the lamp. Lamps which are accidentally broken before the completion of the test shall, when necessary, be replaced to ensure that the required number of lamps complete the test. Any such broken lamps shall be neg
37、lected in calculating the results. The test shall be considered to have terminated when the requirements of the tables have been satisfied. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 40-4a:1966 BSI 0
38、2-20003 11 Conditions of compliance A batch shall be considered as complying with this specification if the requirements contained in a) to e) inclusive below are satisfied. If the batch fails to satisfy the requirements of any of these clauses, it shall be deemed not to comply with the specificatio
39、n. a) Not more than 1 unit of the sample tested shall fail any one of the requirements described in Clauses 3 and 5. b) Not more than two units of the sample tested shall fail any one of the tests described in Clauses 8 and 9. NOTEClause 9 is applicable only to 7-inch and 5#-inch Type 1 units. c) Th
40、e average of the currents passed by the unit in the sample tested under Clause 7 shall lie within the appropriate limits shown in the appropriate tables. d) No unit shall fail the test prescribed in Clause 6. e) The average life of the sample selected for the test shall not fall below the minimum av
41、erage value specified in the appropriate tables. f) The number of units in the sample having lives shorter than 60 per cent of the specified minimum average shall not exceed the value given in the appropriate table. Table 1 7 inch 12 volt 60/45 watt right hand drive unit (Dip left) 1A. Photometric r
42、equirements at 12.8 V on the unit terminals Main beamDipped beam PositionCd Max.Cd Min.PositionCd Max.Cd Min. 2U3R & 3L 1U3R & 3L “DV “D3R & 3L “D6R & 6L “D9R & 9L “D12R & 12L 2DV 2D9R & 9L 3DV 3D12R12L 4DV5 000 1 250 5 000 36 000 12 000 5 000 3 000 1 500 5 000 2 000 2 500 1 000 1“U1L to L 1U1R to R
43、 “U1L to 3L “U1R to R “D1L to L “D2L “D1R to R 1D1R to 6R 1“D2L 1“D9L 1“D9R 4D4L 10U90Ua 1 000 500 2 000 800 10 000 2 000 12 500 125 3 750 750 10 000 1 500 750 a From the normally exposed surface of the lens 1B. Current limits at 12.8 V on the unit terminals Average current limits for 10 units Main
44、filament: Dipped filament: Minimum 4.41 amp 3.31 amp Maximum 4.97 amp 3.73 amp 1C. Life test at 14.0 V on the unit terminals Minimum average life of 10 units Design life Maximum number of units failing before 60 per cent of design life Main filament: Dipped filament: 138 h 221 h 200 h 320 h 2 2 Lice
45、nsed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 40-4a:1966 4 BSI 02-2000 Table 2 5# inch 12 volt 37“ watt Type 1 2A. Photometric requirements at 12.8 V on the unit terminals Main beam PositionCd Max.Cd Min.Po
46、sitionCd Max.Cd Min. 3U3L & 3R 2U3L & 3R 1U3L & 3R “DV “D3L & 3R “D6L & 6R “D9L & 9R 450 750 3 000 25 000 12 000 6 000 2 000 “D12L & 12R 2DV 2D9L & 9R 3DV 3D12D & 12R 4DV2 500 750 3 000 1 250 1 500 600 2B. Current limits at 12.8 V on the unit terminals Average current limits for 10 units Minimum 2.7
47、5 amp Maximum 3.11 amp 2C. Life test at 14.0 V on the unit terminals (Main Beam) Minimum average life of 10 units Design life Maximum number of units failing before 60 per cent of design life 138 h200 h2 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:23 G
48、MT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 40-4a:1966 BSI 02-20005 Table 3 5# inch 12 volt 37“/50 W Type 2 right hand drive unit (Dip left) 3A. Photometric requirements at 12.8 V on the unit terminals Main beamDipped beam PositionCd Max.Cd Min.PositionCd Max.Cd Min. 3U3L & 3R 2U3L & 3R 1U3L & 3
49、R “DV “D3L & 3R “D6L & 6R “D9L & 9R “D12L & 12R 2DV 2D9L & 9R 3DV 3D12L & 12R 4DV2 500 300 750 2 000 7 000 3 000 2 000 1 000 750 2 000 750 1 000 400 1U1R to R “U1R to R “D1R to R 1“U1L to L “U1L to 3L “D2L 1D6R 1“D2L 1“D9L 1“D9R 4D4L 10U to 90Ua 650 850 2 000 1 000 2 000 10 000 12 500 125 3 750 750 12 000 1 500 750 a From the normally exposed surface of the lens 3B. Current limits at 12.8 V on the unit terminals Average current limits for 10 units Main filament Dipped filament Mini
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