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/J279_201103 SURFACE VEHICLE RECOMMENDED PRACTICE J279 MAR2011 Issued 1972-03 Reaffirmed 2011-0
5、3 Superseding J279 MAR2006 Snowmobile Tail Lamp (Rear Position Lamp) RATIONALE No changes have been made to this document. FOREWORD This SAE Recommended Practice is intended as a guide toward standard practice, but may be subject to frequent change to keep pace with experience and technical advances
6、. Hence, its use where flexibility of revision is impractical is not recommended. 1. SCOPE This SAE document provides test methods and requirements for tail lamps for snowmobiles. 2. REFERENCES 2.1 Applicable Publications The following publications form a part of this specification to the extent spe
7、cified herein. The latest issue of SAE publications shall apply. 2.1.1 SAE Publications 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 J567 Lamp Bulb Retention System SAE J575 Test Metho
8、ds and Equipment for Lighting Devices and Components, for Use on Vehicles Less than 2032 mm in Overall Width SAE J576 Plastic Materials for Use in Optical Parts Such as Lenses and Reflectors of Motor Vehicle Lighting Devices SAE J578 Color Specifications SAE J279 Reaffirmed MAR2011 Page 2 of 5 3. DE
9、FINITIONS 3.1 Tail Lamp Lamp used to designate the rear of a snowmobile by a steady-burning, low-intensity light. 3.2 Multiple-Compartment Lamp A device which gives its indication by two or more separately lighted areas which are joined by one or more common parts such as a housing or lens. 3.3 Mult
10、iple Lamp Arrangement An array of two or more separated lamps on each side of the snowmobile which operate together to give a signal. 4. LABORATORY REQUIREMENTS 4.1 A multiple compartment lamp or multiple lamps may be used. 4.2 The following sections from SAE J575 are a part of this document. 4.2.1
11、Section 3 Definitions. 4.2.2 Section 3.2 Bulbs. 4.2.3 Section 4.1 Vibration. 4.2.4 Section 4.2 Moisture Test. 4.2.5 Section 4.3 Dust Test. 4.2.6 Section 4.4 Corrosion Test. 4.2.7 Section 4.5 Photometry. 4.2.8 Section 4.6 Warpage Test on Devices with Plastic Components 4.3 Plastic Materials Any plast
12、ic materials used in optical parts shall comply with the requirements set forth in SAE J576. SAE J279 Reaffirmed MAR2011 Page 3 of 5 4.4 Color Test The color of the light from a tail lamp shall be red. (See SAE J578.) 4.5 If the tail lamp is optically combined with another lamp such as a stop lamp o
13、r turn signal and a two-filament bulb is used, the bulb shall have an indexing base and the socket shall be designed so that bulbs with nonindexing bases cannot be used. As a matter of information, attention is called to typical sockets shown in SAE J567. 4.6 Photometric Requirements 4.6.1 All beam
14、candela measurements shall be made with the incandescent filament of the signal lamp at least 3 m (10 ft) from the photometric screen. The H-V axis shall be taken as parallel to the longitudinal axis of the vehicle. When compartments or lamps are photometered together, the H-V axis shall intersect t
15、he midpoint between the optical centers (filament). 4.6.2 Beam candela measurements of multiple compartment lamp or multiple lamp arrangements shall be made by either of the following methods: a. All compartments or lamps may be photometered together, provided that a line from the optical axis (fila
16、ment centers) of each compartment or lamp to the center of the photometer sensing device does not make an angle of more than 0.6 degree with the photometer (H-V) axis. b. Each compartment or lamp may be photometered separately by aligning its axis with the photometer and adding the value at each tes
17、t point. 4.6.3 Table 1 lists design candela requirements for a tail lamp. SAE J279 Reaffirmed MAR2011 Page 4 of 5 TABLE 1 - MINIMUM DESIGN CANDELA REQUIREMENTS Test Points, degrees Test Points, degreesLighted Sections1 Lighted Sections 2 Lighted Sections3 10L 0.2 0.3 0.4 V 0.3 0.5 0.8 10U and 10D 10
18、R 0.2 0.3 0.4 20L 0.2 0.3 0.4 10L 0.4 0.7 1.0 5L 0.7 1.0 1.5 V 0.9 1.5 2.3 5R 0.7 1.0 1.5 10R 0.4 0.7 1.0 20R 0.2 0.3 0.4 5U and D 20L 0.2 0.4 0.5 10L 0.4 0.7 1.0 5L 1.0 1.8 2.5 H V 1.0 1.8 2.5 5R 1.0 1.8 2.5 10R 0.4 0.7 1.0 20R 0.2 0.4 0.5 NOTE 1: Specifications are based on laboratories using accu
19、rate, rated bulbs during testing.NOTE 2: Lamps designed to operate on the vehicle through a resistor or equivalent shall be photometered with the listed design voltage of the design source applied across the combination of resistance and filament. NOTE 3: A multiple device tail lamp gives its indica
20、tion by two or more separately lighted sections which may be separate lamps, or areas that are joined by common parts. The photometric values are to apply when all sections which provide the tail signal are considered as a unit. 5. INSTALLATION REQUIREMENTS The following requirements apply to the de
21、vice as used on the vehicle and are not part of the laboratory test requirements and procedures. SAE J279 Reaffirmed MAR2011 Page 5 of 5 Visibility of the tail lamp shall not be obstructed by any part of the vehicle throughout the photometric test angles for the lamp, unless the lamp is designed to
22、comply with all photometric and visibility requirements with these obstructions considered. Signals from lamps on both sides of the vehicle shall be visible through a horizontal angle from 45 degrees to the left to 45 degrees to the right. Where more than one lamp or optical area is lighted on each
23、side of the snowmobile, only one such area on each side need comply. To be considered visible, the lamp must provide an unobstructed projected illuminated area of outer lens surface, excluding reflex, at least 13 cm2(2 in2) in extent, measured at 45 degrees to the longitudinal axis of the vehicle. A
24、s a minimum, the taillight shall be lighted when the headlight is energized. 6. NOTES 6.1 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
