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 2009 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: 724-776-4970 (outside USA)
4、 Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SURFACE VEHICLE RECOMMENDED PRACTICE J2806 JUN2009 Issued 2009-06 Off-Vehicle Brake Testing for Service Brakes Over 10 000 lb GVW Air, Hydraulic, and Mechanical Actuation RATIONALE Subject Recommended Practice, a “ne
5、w document”, was designed and intended to provide the tools needed to objectively determine suitability for all ground wheeled vehicle brake systems and selected spare parts (secondary item components), to include research and development programs. Subject document is essentially a “specification of
6、 specifications“ focused on the use of inertia brake dynamometers for system and selected components comparison without the need for traditional and resource-intensive on-vehicle testing for all ground wheeled vehicles exceeding 4536 kg (10 000 US lb) Gross Vehicle Weight Rating (GVWR), and limited
7、other specified opportunities. TABLE OF CONTENTS 1. SCOPE 4 1.1 Purpose . 4 1.2 Classifications . 4 1.3 Limited Applicability . 5 1.4 No FMVSS Conflict/Impacts . 5 2. REFERENCES 5 2.1 Applicable Publications . 5 2.1.1 SAE Publications . 5 2.1.2 US Government Publications 6 2.1.3 ASTM International P
8、ublications . 6 2.1.4 International Organization for Standardization (ISO) Publications . 7 2.1.5 European Commission for Europe (ECE) Regulations/Publications 7 2.1.6 Japanese Industry Publications 7 2.1.7 Industry Publications . 7 2.2 Order of Precedence . 7 3. DEFINITIONS, SYMBOLS, AND ABBREVIATI
9、ONS 8 3.1 Requesting Activity (“RA”) . 8 3.2 Standards Developing Organization(s) (SDO/SDOs) . 8 4. GENERAL TECHNICAL REQUIREMENTS . 8 4.1 Design and Intended Use . 8 4.1.1 Minimum Acceptable Performance . 8 4.1.2 Prohibit Previous Unreliable Acceptance Practices 9 4.1.3 “Standard” and “Optional” Te
10、sting 9 4.1.4 Potential Use as a “Pass-Fail” Document . 9 4.1.5 R single brake chamber with separate emergency/parking brake h. Type 3-1b: “air” S-cam drum brakes - single-actuator; dual brake chamber for service and emergency/parking (spring brakes) i. Type 3-2a: “air” Wedge drum brakes - single-ac
11、tuator and dual actuator types when only one actuator is used; single brake chamber with separate emergency/parking brake SAE J2806 Issued JUN2009 Page 5 of 52 j. Type 3-2b: “air” Wedge drum brakes - single-actuator and dual actuator types when only one actuator is used; dual brake chamber for emerg
12、ency/parking (spring brakes) k. Type 3-3a: “air” Wedge drum brakes - dual-actuator; single brake chamber with separate emergency/parking brake l. Type 3-3b: “air” Wedge-type drum brakes - dual-actuator; dual brake chamber for emergency/parking (spring brakes) 1.3 Limited Applicability Subject specif
13、ication is intentionally limited to ground vehicle and support equipment “dry” disc and drum brake systems when used as service brakes and/or service brakes used as emergency or parking brakes, therefore the type of actuation and media for actuation is mainly used within subject specification as a d
14、iscriminator for determining which standard test procedure is most applicable. 1.4 No FMVSS Conflict/Impacts Subject specification does not, nor was it intended to, serve as a replacement for mandatory US and similar Governmental wheeled vehicle on-vehicle testing under US Federal Motor Vehicle Safe
15、ty Standards (FMVSS) or similar US Federal road and off-road vehicle standards. 2. REFERENCES 2.1 Applicable Publications The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the latest version of SAE publications shall apply. The d
16、ocuments listed in this section will be specified in Sections 3, 4, or 5 of this document. This section does not include documents cited in other sections of this document or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this li
17、st, document users are cautioned that they will meet all specified requirements of documents cited in this document, whether or not they may be listed. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada
18、) or 724-776-4970 (outside USA), www.sae.org. SAE J160 Dimensional Stability of Friction Materials When Exposed to Elevated Temperatures SAE J379 Gogan Hardness of Brake Lining SAE J840 Test Procedures for Shear Strength of Automotive Brake Pads and Brake Lining Assemblies SAE J2115 Air Brake Perfor
19、mance and Wear Test Code Commercial Vehicle Inertia Dynamometer SAE J2334 Laboratory Cyclic Corrosion Test SAE J2468 Road VehiclesBrake LiningsCompressibility Test Procedure SAE J2522 Dynamometer Global Brake Effectiveness SAE J2598 Automotive Disc Brake Pad Natural Frequency and Damping Test SAE J2
20、627 Commercial Vehicle Braking System Definitions SAE J2707 Wear Test Procedure on Inertia Dynamometer for Brake Friction Materials SAE J2806 Issued JUN2009 Page 6 of 52 2.1.2 US Government Publications The following specifications, standards, and handbooks form a part of this document to the extent
21、 specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. 2.1.2.1 Federal Publications Available from the Document Automation and Production Service (DAPS), Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697
22、-6257, http:/assist.daps.dla.mil/quicksearch/. The Federal Standardization Manual (Copies of the documents below are available from the Code of Federal Regulations (http:/www.gpoaccess.gov/cfr/index.html). Federal Motor Vehicle Safety Standards (FMVSS) 49CFR 571.105, 571.121, and 571.135 2.1.2.2 Dep
23、artment of Defense Publications Available from the Document Automation and Production Service (DAPS), Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-6257, http:/assist.daps.dla.mil/quicksearch/. FED-STD-595 Colors Used in Government Procurement MIL-STD-810 Environmental
24、Engineering Considerations and Laboratory Tests MIL-STD-961 DoD Standard Practice for Defense Specifications (Note: Material specifications) MIL-STD-962 Defense Standards Format and Content (Note: Test specifications and handbooks) MIL-STD-1366E Interface Standard for Transportability Criteria 2.1.2
25、.3 Military Publications For copies of the items below and subject ATPD, contact the appropriate Procurement Contracting Officer (PCO), or the U.S. Army Tank-Automotive Research, Development and Engineering Center (TARDEC), ATTN: AMSRD-TAR-E/CM/DM/STND Mail Stop #268, 6501 East 11 Mile Road, Warren,
26、 MI 48397-5000, or by email DAMI_STANDARDIZATIONconus.army.mil.) Test Operational Procedure (TOP)Braking, Wheeled Vehicles (TOP/MTP) 2-2-608 Tank-Automotive and Armaments Command Purchase Descriptions (ATPD) ATPD-2354 (All changes/revisions), Off-vehicle Brake Testing for Military and Militarized Co
27、mmercial Ground Vehicles over 3,500 kg (7,716 US Lbs.) Gross Vehicle Weight Rating (GVWR) ATPD-2383 (All changes/revisions), Commercial and Military Off-vehicle Brake Testing for Ground Vehicles over 4,536 kg (10,000 US Lbs.) Gross Vehicle Weight Rating (GVWR) 2.1.3 ASTM International Publications A
28、vailable from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM B 117 Standard Practice for Operating Salt Spray (Fog) Apparatus ASTM E 10 Standard Test Method for Brinell Hardness of Metallic Materials SAE J2806 Issued
29、JUN2009 Page 7 of 52 2.1.4 International Organization for Standardization (ISO) Publications Available from ANSI, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org. ISO 611 Road vehiclesBraking of automotive vehicles and their trailersVocabulary ISO 6310 Road vehiclesBrak
30、e LiningsCompressive strain test methodSecond edition ISO 6312 Road vehiclesDimensions of motor vehicles and towed vehiclesTerms and DefinitionsFirst edition ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories ISO 22574 Road vehiclesBrake linings frictions m
31、aterialsVisual inspection ISO 26865 Road vehiclesBrake linings friction materialsPerformance test procedure for commercial vehicles 2.1.5 European Commission for Europe (ECE) Regulations/Publications Available from United Nations Economic Commission for Europe, Palais des Nations, CH-1211, Geneva 10
32、, Switzerland, Tel: +41-0-22-917-12-34, www.unece.org. ECE R90 (aka R 90) Replacement Friction Materials 2.1.6 Japanese Industry Publications Available from Society of Automotive Engineers of Japan, 10-2, Gobancho, Chiyoda-ku, Tokyo 102-0076, Japan, Tel: +81-3-3262-8211, www.jsae.or.jp. JASO C407 Br
33、aking DeviceDynamometer Test Procedures 2.1.7 Industry Publications Available from Bosch Automotive Books/Manuals, Robert Bosch Gmbh, Postfach 30 02 20, D-70442, Stuttgart, Germany; or SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or
34、724-776-4970 (outside USA), www.sae.org. Bosch Automotive Brake Systems, 1stEdition, 1995 (Table 6, Page 20 or its successors equation reference only) 2.2 Order of Precedence In the event of a conflict between the text of this document and the references cited herein, the text of this document takes
35、 precedence. Nothing in this document, however, supersedes applicable Federal laws and regulations unless a specific exemption has been obtained by the user(s). SAE J2806 Issued JUN2009 Page 8 of 52 3. DEFINITIONS, SYMBOLS, AND ABBREVIATIONS In addition to those listed below in this paragraph, defin
36、itions, symbols, and abbreviations (acronyms) used in this specification are listed in 1) SAE J2627, Brake Systems DefinitionsTruck and Bus, 2) MIL-STD-810, Environmental Engineering Considerations and Laboratory Tests; 3) within each individual included specification contained in the subject docume
37、nt and 4) Appendix B within this document. When required, other non-standard definitions, terms, and acronyms may be used and must be identified and fully defined by the “RA“ (see 3.1) and/or the participating testing activity. 3.1 Requesting Activity (“RA”) The inclusive term “RA”, as used within s
38、ubject specification, will be defined as the responsible corporate-level management, or corporate level engineering authority, or corporate-designated internal vehicle design authority, or similar (non-procurement) “Officer of the Corporation” who has the legal authority to direct the conduct of tes
39、ting and analysis within the requirements of subject specification, except for Governmental and military-peculiar acquisitions for which a specific but similar definition of “ESA” (Engineering Support Activity) is contained in paragraph 3.1, ATPD-2354. Procurement offices/activities, other administr
40、ative and quasi- procurement offices/activities, test activities, and other similar subordinate organizations are specifically excluded from this definition as they do not have the engineering expertise and/or legal approval authority required for brake systems and their subcomponents. 3.2 Standards
41、 Developing Organization(s) (SDO/SDOs) The term “Standards Developing Organization” (SDO/SDOs) is self-explanatory and refers to organizations such as SAE, ANSI, ISO, etc. With limited exceptions, such as Technology and Maintenance Council of American Trucking Association (TMC/ATA), please use the f
42、ollowing URL as reference: http:/www.ansi.org/internet_resources/standards_devel_organizations. 4. GENERAL TECHNICAL REQUIREMENTS 4.1 Design and Intended Use Subject standard is designed to provide objective, accurate, and repeatable data for physical characterization and quantifiable test performan
43、ce of ground vehicle major brake systems, and/or the following specified component assemblies: disc brake rotors and pads; drum brake drums and brake shoes (assemblies only). Objectives will be accomplished through the application of the standardized and multi-layered processes, characterizations, a
44、nd quantitative testing described within subject specification. a. It will be presumed for the purposes of subject specification that the OEM test samples are representative of those originally qualified as part of the vehicle brake system originally tested and approved for production vehicle FMVSS
45、compliance verifications; vehicle system and component verification and/or qualification testing; or “RA” (see 3.1) designated “OEM substitutes” when the original OEM parts are no longer available, have been obsoleted by circumstances which preclude availability beyond the control of the “RA” (see 3
46、.1), or are no longer suitable for testing due to age, condition, or known defects. b. Potential alternative suppliers will be forewarned that friction performance characteristics that are notably different than the OEM items, or “RA” (see 3.1) designated alternatives, may be unacceptable due to con
47、cerns with “pitch” (rear to front bias) and “yaw” (side to side bias) regardless of intended/unintended use on the same or different axles. This concern was one of the primary reasons why emphasis has been placed on the “Standard” dual-ended brake dynamometer testing. 4.1.1 Minimum Acceptable Perfor
48、mance Even though subject specification is not a “pass-or-fail” document, the minimum acceptable performance by any potential alternative supplier will be “equal-to-or-better-than” the average of the three (3) OEM test sample items for all requirements except for the following when not already speci
49、fied by the applicable Federal regulations, item specific part drawing specification, catalog description, or any other readily identifiable requirement of the OEM parts: SAE J2806 Issued JUN2009 Page 9 of 52 a. Material requirements, to include hardness b. Friction material and composition c. Noise, vibration, and harshness (NVH) d. FMSI configuration (number) if the alternate product is fully functional without kits o
