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 2010 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.orgSAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/J1279_201008SURFACEVEHICLERECOMMENDEDPRACTICEJ1279 AUG2010 Issued 1988-12 Revised 2010-08Supers
5、eding J1279 JAN2008 Snowmobile Drive Mechanisms RATIONALE Revisions and updates intended to unify the standard with current and prior industry practice. 1. SCOPE This SAE Recommended Practice is applicable to snowmobiles as defined in SAE J33. 1.1 Purpose To provide minimum requirements and tests fo
6、r evaluating the structural integrity of snowmobile drive mechanisms (that is, drive pulleys, driven pulleys, torque converters, centrifugal clutches, or similar mechanisms). 2. REFERENCES 2.1 Applicable Document The following publication forms a part of this specification to the extent specified he
7、rein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1 SAE Publication Available from SAE International, 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 J33 Snowmobile Defin
8、itions and Nomenclature - General 3. EQUIPMENT Provide means capable of spinning the test samples to the velocities set out in 5.2, a tachometer accurate to 1% and any guards or shields necessary to protect operators and observers. Figure 1 is an example of such equipment. The test equipment shall n
9、ot alter the structural integrity of the sample. SAE J1279 Revised AUG2010 Page 2 of 3FIGURE 1 - EXAMPLE OF SPIN TEST MECHANISM SAE J1279 Revised AUG2010 Page 3 of 34. REQUIREMENTS The mechanisms chosen for the test shall withstand the test of Section 5 without any resultant fractures or cracks. 5.
10、TEST PROCEDURE 5.1 Perform the test at any ambient temperature. 5.2 Spin the sample about its axis of rotation. Each mechanism shall be tested at an rpm of: a. No less than 1.5 times the maximum horsepower rpm of the prime mover but not less than 12 000 rpm, and times any effective drive ratio, or b
11、. 1.25 times engine rpm at wide open throttle with no load (belt removed). 5.3 Maintain the applicable rpm for 5 min. 6. NOTES 6.1 Marginal Indicia A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have
12、been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE SNOWMOBILE TECHNICAL COMMITTEE
