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 theref
2、rom, 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 ma
3、y 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 US
4、A) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J2848/2_201106RATIONALEToday the world of mobility is served extensively by tires which are pne
5、umatic in design. To function correctly these tire designs need pneumatic pressure to derive their performance characteristics - optimum tread wear, fuel economy, ride quality, or fatigue life - hence the value of keeping the retained pressure at design levels ranks high. While periodic inspection a
6、nd the periodic action of adjusting the inflation pressure while a vehicle is at rest has been the norm for maintaining pressure, the need to hold tire inflation pressures closer to their design targets over time, even while operating a vehicle on the open road at highway speeds, becomes apparent. T
7、he minimum performance capabilities recommended in the following document support these needs.Within the medium and heavy-duty vehicle industry, the equipment supplier community has responded to the need to maintain inflation pressure, by developing various tire pressure systems which automatically
8、re-inflate the tire/wheel assemblies even while operating on the highway. Because these systems do not require any intervention or action by the operator, operators will eventually come to rely upon these systems to maintain tire inflation pressure. It is therefore important that all marketed system
9、s provide an adequate level of performance to assure continued in-service safety.Tires and wheels are integral components of tire pressure systems. The system attributes for tire pressure systems described herein assume an appropriate fitment of tire and wheel for each application, and that these ti
10、re pressure systems are not dependent on the performance or physical characteristics of the tire or wheel components. The substitution of one tire/wheel assembly for another tire/wheel assembly of another configuration, appropriate for the vehicle system, shall not render the tire pressure system in
11、operative, so long as it provides a pneumatic chamber for the inflation gas.Under SAE document J2848-1, the system functions and performance expectations for tire pressure monitoring systems have been established. The subject document (SAE J2848-2) addresses tire pressure maintenance systems for whi
12、ch it is essential that the performance and communications to the driver be consistent with that established for tire pressure monitoring systems (see Figure 1). SURFACEVEHICLERECOMMENDEDPRACTICEJ2848-2 JUN2011 Issued 2011-06Tire Pressure Systems - Maintenance (ATIS) Type For Medium and Heavy Duty H
13、ighway Vehicles SAE J2848-2 Issued JUN2011 Page 2 of 15 CTIS (Management)ATIS (Maintenance) TPMS (Monitoring)FIGURE 1 - RELATIONSHIP OF TIRE PRESSURE SYSTEMSWhile tire pressure maintenance systems do not relieve the driver of his immediate responsibility to take the recommended maintenance action, t
14、hese systems must still keep the driver informed of the status of the pressure level and make him aware when the system applied is no longer performing its intended function.This document incorporates the attributes of pressure maintenance systems into the management of tire inflation pressure while
15、 retaining the alerts and warnings so vitally important to the driver. SAE J2848-2 Issued JUN2011 Page 3 of 15 TABLE OF CONTENTS1. SCOPE 41.1 Purpose . 42. REFERENCES 42.1 Applicable Documents 42.1.1 SAE Publications . 52.1.2 ASTM Publication 52.1.3 Federal Publications . 52.2 Related Publications .
16、 52.2.1 The Tire and Rim Association Publication 52.2.2 ETRTO Publication . 62.2.3 JATMA Publication 62.2.4 ISO Publications 62.2.5 ATA Publication . 62.2.6 Federal Publications . 63. DEFINITIONS . 73.1 Terms 73.2 Symbols and Abbreviations 84. TIRE PRESSURE SYSTEMS - MAINTENANCE TYPE . 84.1 General
17、System Requirements . 84.2 Advanced System Requirements 104.3 Component Performance Requirements - Valves, Sensors, Regulators, Control Modules, etc. . 104.3.1 Environmental . 104.3.2 Corrosion. 104.3.3 Proof Pressure 115. TIRE PRESSURE SYSTEM . 115.1 System HMI Characteristics 115.2 System Performa
18、nce Thresholds . 125.3 Controls, Symbols, Switches 125.4 Owners Manual Information . 126. ATIS SYSTEM - PERFORMANCE DEMONSTRATION 136.1 Vehicle Test (Power Unit, Trailers, Dollies) 137. NOTES 157.1 Marginal Indica 15FIGURE 1 RELATIONSHIP OF TIRE PRESSURE SYSTEMS . 2FIGURE 2 MAINTENANCE SYSTEM OPERAT
19、ING RANGE 12SAE J2848-2 Issued JUN2011 Page 4 of 15 1. SCOPE This SAE Recommended Practice defines the system and component functions, measurement metrics, and testing methodologies for evaluating the functionality and performance of ground vehicle tire pressure maintenance (ATIS) systems (systems w
20、hich automatically restore the inflation pressure to its specified level), and recommended maintenance practices for these systems within the known operating environments. These systems are recommended to address all serviceable tires as originally installed on a vehicle by the OEM and/or specialty
21、vehicle manufacturer, and for the aftermarket (including replacement or spare parts) are recommended (but optional) to address all tire/rim combinations installed after initial vehicle sale or in-use dates.This document is applicable to all axle and all wheel combinations for the following vehicle t
22、ypes - single unit powered vehicles exceeding 7257 kg (16 000 lb) gross vehicle weight rating (GVWR), and multi-unit vehicle combinations, up to three towed units, which use an SAE J560 connector for power and/or communication, or equivalent successor connector technology. For combination vehicles i
23、ncluding two or more trailers, the dolly axles are also included. The included vehicles can be newly manufactured vehicles or existing vehicles, fitted with air or hydraulic braking systems.SPECIAL NOTE: Equipment known as dual tire equalizers are commonly used with this category of vehicles. When e
24、mploying an ATIS system, dual tire equalizers systems are not recommended as they run counter to the purpose of the maintenance system.NOTE: The following systems are not being addressed in this edition of the subject document.1. The management system types and more mature/complex versions of mainte
25、nance and management types, to include on-board reporting/storage/retrieval data/control capabilities, will be addressed separately by future changes/additions to this document series.2. Tire pressure monitoring systems - These systems have been addressed under SAE J2848-1. 1.1 Purpose The installed
26、 systems for the maintenance of tire inflation pressure defined herein are on-board vehicle systems only. The maintenance type systems described herein may be controlled mechanically, electronically, and/or a combination of both, and should include sensing, restoring, and indicating/communicating, a
27、nd recording (when specified by the OEM or user) capabilities. The design approach taken is expected to support the purpose and performance objectives of such a maintenance type system, and to function within the intended operating environment and design configuration of the vehicle itself.The tire
28、pressure system of the maintenance (ATIS) type is intended to (1) restore the tires lost inflation gas, measured as inflation pressure, relative to the SSP (specified service pressure) under each operational stage; (2) maintain the specified service pressure level for the typical range of ambient co
29、nditions; and (3) provide the driver with indications of low uncorrected pressure(s) and system malfunction.2. REFERENCES 2.1 Applicable Documents The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publicat
30、ions shall apply. SAE J2848-2 Issued JUN2011 Page 5 of 15 2.1.1 SAE Publications 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 J560 Primary and Auxiliary Seven Conductor El
31、ectrical Connector for Truck-Trailer Jumper CableSAE J1211 Handbook for Robustness Validation of Automotive Electrical/Electronic ModulesSAE J1455 Recommended Environmental Practices for Electronic Equipment Design in Heavy-Duty Vehicle ApplicationsSAE J1609 Air Reservoir Capacity Performance Guide
32、- Trucks and Buses SAE J1939 Recommended Practice for a Serial Control and Communications Vehicle Network SAE J2334 Laboratory Cyclic Corrosion Test SAE J2402 Road Vehicles - Symbols for Controls, Indicators, and Tell-tales SAE J2721 Recommended Corrosion Test Methods for Commercial Vehicle Componen
33、ts SAE J2848-1 Tire Pressure Monitoring Systems - For Medium and Heavy Duty Highway Vehicles 2.1.2 ASTM Publication Available 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 Salt Spray (Fog) Testing 2.1.3 Fed
34、eral Publications Available from Federal Motor Carriers Safety Administration, United States Department of Transportation, 1200 New Jersey Avenue, SE, Washington , DC 20590, Tel: 1-800-832-5660, www.fmcsa.dot.gov.Commercial Vehicle Tire Condition Sensors (FMCSA - Dec. 2003) Tire Pressure Monitoring
35、and Maintenance Systems Performance Report (FMCSA - Jan. 2007) 2.2 Related Publications The following publications are provided for information purposes only and are not a required as part of this SAE Technical Report.2.2.1 The Tire and Rim Association Publication Available from The Tire and Rim Ass
36、ociation, 175 Montrose West Avenue, Suite 150, Copley, OH 44321, Tel: 330-666-8121, www.us-tra.org.Tire and Rim Year BookSAE J2848-2 Issued JUN2011 Page 6 of 15 2.2.2 ETRTO Publication Available from The European Tyre and Rim Technical Organisation, Secretariat, Av. Brugmann, 32/2, B - 1060 Brussels
37、, Belgium, Tel: +32-2-344-40-59, www.etrto.org.ETRTO Standards Manual 2.2.3 JATMA Publication Available from the Japan Automobile Tyre Manufacturers Association, 8 Floor, No. 33 Mori Bldg., 3-8-21 Toranomon, Minato-ku, Tokyo, 105-0001 Japan, Tel: 81-3-3435-9094, www.jatma.or.jp.JATMA Year Book 2.2.4
38、 ISO Publications Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org.ISO 7000 Graphical symbols for use on equipmentIndex and synopsis ISO 2575 Road VehiclesSymbols for controls, indicators and tell-tales ISO/IEC 2575:2
39、004 Road vehicles. Symbols for controls, indicators and tell-tales2.2.5 ATA Publication Available from American Trucking Associations Headquarters, 950 North Glebe Road, Suite 210, Arlington, VA 22203-4181, Tel: 703-838-1700, .ATA/TMC RP-235A Guidelines for Tire Inflation Pressure Maintenance (2008)
40、 2.2.6 Federal Publications Available from Federal Communications Commission, 445 12th Street, SW, Washington, DC 20554, Tel: 1-888-225-5322, www.fcc.gov.47 CFR Part 15 Telecommunications Federal Communications Commission - Radio Frequency Devices Available from the Federal Register, National Highwa
41、y Traffic Safety Administration, 400 Seventh Street, SW, Washington, DC 20590, www.nhtsa.dot.gov.Title 49 Code of Federal Regulations Federal Motor Vehicle Safety Standards - Part 571 FMVSS 101 Controls and Displays FMVSS 120 Tire Selection and Rims - Tire selection and rims for motor vehicles with
42、a GVWR of more than 4,536 kilograms (10,000 pounds). FMVSS 105 Hydraulic and Electric Brake Systems FMVSS 135 Light Vehicle Brake Systems FMVSS 121 Air Brake Systems SAE J2848-2 Issued JUN2011 Page 7 of 15 3. DEFINITIONS 3.1 Terms 3.1.1 Baseline Temperature The temperature condition when the tires c
43、ontained air, the tires interior structure, and the adjacent ambient air temperature are the same 3.1.2 Standard Tire Mounting The action of assembling a tire and its specified wheel by button-holing the tires beads over the wheels flanges using a mechanized, rotating bead bar, or manual mounting to
44、ols. 3.1.3 Specified Service Pressure (SSP) The cold pressure level for a tire/wheel assembly defined by the vehicle manufacturer or tire manufacturer for the intended service conditions (load, speed, etc.) of a given vehicle.3.1.4 Operational Service Pressure (OSP) The actual pressure level of the
45、tire/wheel assembly at any point during service whether at ambient or at elevated temperature due to rolling under load. 3.1.5 Self Diagnostic A device function by which an analysis of system readiness can occur resulting in a positive or negative outcome.3.1.6 Tire Pressure System A group of intera
46、cting components whose purpose is to measure, directly or through other parameters which correlate to pressure, the pressure level of the tire/wheel assembly. 3.1.7 ATIS A generic term for tire pressure systems of the maintenance type which when fitted to a vehicle (1) sense the drop in gauge pressu
47、re level in a tire/wheel assembly directly or indirectly, (2) provide a one-way flow of inflation gas into each assembly, and (3) restore the gauge pressure reading to the specified level.3.1.8 Low Pressure (re-inflate) Threshold A change of pressure (x P) relative to the OSP indicating an actual lo
48、ss of inflation gas from the tire/wheel assembly, or as a change in a parameter(s) which directly relate(s) to the actual loss of inflation gas, which serves as a trigger for activating the installed tire pressure systems response. 3.1.9 Minimum Activation Pressure (MAP) A gauge pressure reading bel
49、ow the SSP which serves as a trigger for activating the installed tire pressure systems response, and defines the low pressure threshold regardless of the actual loss of inflation gas.3.1.10 Human Machine Interface (HMI) The device(s) which serve to bring about an understanding or communication between a human and a machine concerning the status of the monitored parameter(s).SAE J2848-2 Issued JUN2011 Page 8 of 15 3.1.
