1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2011 SAE International All rights reserved. No part of this publication m
3、ay be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside U
4、SA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/J280_201103 SURFACE VEHICLE STANDARD J280 MAR2011 Issued 1972-01 Reaffirmed 2011-03 Supersedin
5、g J280 FEB2006 Snowmobile Headlamps RATIONALE No changes have been made to this document. FOREWORD This SAE Standard is intended as a guide toward standard practice, but may be subject to frequent change to keep pace with experience and technical advances. Hence, its use where flexibility of revisio
6、n is impractical is not recommended. 1. SCOPE This standard provides test methods and requirements for snowmobile headlamps. 2. REFERENCES 2.1 Applicable Publication The following publication forms a part of the specification to the extent specified herein. Unless otherwise indicated the lastest rev
7、ision of SAE publications shall apply. 2.1.1 SAE Publication Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J575 Tests for Motor Vehicle Lighting Devices and Components SAE J280 Reaffirm
8、ed MAR2011 Page 2 of 4 The following sections from SAE J575 are a part of this document: Section 3 Definitions Section 3.2 Bulbs Section 4.1 Vibration Test Section 4.2 Moisture Test Section 4.3 Dust Test Section 4.4 Corrosion Test Section 4.5 Photometry Section 4.6 Warpage Test Devices with Plastic
9、Lenses Color Test The light shall be white to amber. Sealed Beam headlamps do not need to comply with Sections 4.3 and 4.4 of SAE J575. 3. DEFINITIONS 3.1 Snowmobile Headlamps Snowmobile headlamps are one or more lamps mounted on the front of a snowmobile used as the major lighting device to provide
10、 general illumination ahead of the snowmobile. The photometric requirements stated in Tables 1 and 2 represent the total headlamp illumination requirement for a snowmobile. 3.1.1 If multiple headlamps are used to meet this document, the combination of lamps, as mounted on the snowmobile, shall meet
11、the requirements when treated as one lamp. 3.1.2 The headlamp shall not be obstructed by any part of the snowmobile throughout the photometric test angles for the lamp, unless the lamp is designed to comply with all photometric requirements with these obstructions considered. 4. AIMING ADJUSTMENT TE
12、STS 4.1 A minimum aiming adjustment of 4 deg shall be provided in the vertical plane from a basic aiming position of 1/2 D-V (0.5 deg) with the machine on a hard surface, the suspension adjusted to the manufacturers recommended setting and the machine loaded to simulate an 80 kg operator at the desi
13、gnated seating position. 4.2 The mechanism, including the aiming adjustment, shall be so designed as to prevent the unit from receding into the lamp body or housing when an inward force of 50 lb (22.7 N) is exerted at the geometric center of the outer surface of the lens. 4.3 When adjusting screws a
14、re employed, they shall be equipped with self-locking devices which will operate satisfactorily for a minimum of 10 adjustments on each screw, over a length of screw thread of 1/8 in (3.175 mm). 4.4 Headlamp Mounting The headlamp should be mounted on the snowmobile as high as practicable above the s
15、urface of the ground and below the snowmobile operators line of sight. In order to facilitate setting and maintaining the proper adjustment of the headlamp on snowmobiles in use, the following requirements for headlamp design and mounting shall be adopted and followed in general practice and be equa
16、lly applicable to new designs of headlamps and headlamp mountings. Headlamps and headlamp mountings shall be designed and constructed so that: SAE J280 Reaffirmed MAR2011 Page 3 of 4 4.4.1 The axis of the light beam may be adjusted conveniently by one person using ordinary tools, up and down from th
17、e designed setting, in the amount determined by practical operating conditions. 4.4.2 When the headlamp is secured, the aim will not be disturbed under ordinary conditions of operation. 4.5 Visual Service Aiming The geometric center of the high intensity zone of the upper beam of the multiple beam h
18、eadlamps shall be deemed sufficiently defined for the purpose of service aiming if it can be set by three experienced observers on a vertical screen at 25 ft (7.6 m) within a maximum vertical deviation of 0.2 deg 1 in (25.4 mm) and within a maximum horizontal deviation of 0.4 deg 2 in (50.8 mm). The
19、 aim for each observer shall be taken as the average of at least three observations. 4.6 Beam Aim During Photometric Test The upper beam of a multiple beam headlamp shall be aimed photoelectrically so that the center of the zone of highest intensity falls 0.4 deg vertically below the lamp axis and i
20、s centered laterally. The center of the zone of highest intensity shall be established by the intersection of a horizontal plane passing through the point of maximum intensity, and the vertical plane established by balancing the photometric values at 6 deg left and 6 deg right. 4.7 Photometric Tests
21、 Shall be made with the photometer at a minimum distance of 60 ft (18.3 m) from the lamp. The headlamp shall be operated at its rated voltage during the test and in accordance with 3.1.2. 4.8 At Focus Tests The light source shall be located in the design position with respect to the reflector as spe
22、cified by the manufacturer. 4.8.1 When aimed as described in 4.6, the high beam of the headlamp shall meet the candela requirements in Table 1. TABLE 1 - UPPER BEAM Position, deg Candela, cd3U-V 1200 min 1/2D-V 18 000 min 1-1/2D-6L to 6R 6000 min 1-1/2D-9L to 9R 3000 min 1-1/2D-15L to 15R 1000 min 4
23、-1/2D-V 1200 min NOTE: A tolerance of 1/4 deg should be allowed at any test point. 4.8.2 When aimed, as described in 4.6, the low beam of the headlamp shall meet the candela requirements in Table 2. SAE J280 Reaffirmed MAR2011 Page 4 of 4 TABLE 2 - LOWER BEAM Position, deg Candela, cd 1/2U-Anywhere
24、2000 max 11/2D-V 5000 min 3D-V 9000 min 11/2D6L to 6R 3000 min 3D-6L to 6R 6000 min 11/2D9L to 9R 2000 min 3D-9L to 9R 3000 min 3D -15L to 15R 1000 min 41/2D-V 1500 min NOTE: A tolerance of 1/4 deg should be allowed at any test point. 5. NOTES 5.1 Marginal Indicia The change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions have been made to the previous issue of the report. An (R) symbol to the left of the document title indicates a complete revision of the report. PREPARED BY THE SAE SNOWMOBILE COMMITTEE
