SAE-J2403-2008.pdf
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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 ther
2、efrom, 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 2008 SAE International All rights reserved. No part of this publication
3、may 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 J2403 DEC2008 SURFACE VEHICLE RECOMMENDED PRACTICE Issued1998-10 Revised 2008-12 Superseding J2403 AUG2007 (R) Medium/Heavy-Duty E/E Systems Diagnosis Nomenclature RATIONALE SAE J2403 changes have been made to refle
5、ct recent additions of new terminology derived for the 2010 engine products. Included in this version are terms for the following systems: Selective Catalytic Reduction (SCR), NOx Adsorber (NAC), more terms for Diesel Oxidation Catalyst (DOC), and Gas Oxidation Catalyst (GOC). Diagrams for SCR, NAC,
6、 and DPF systems have been added to the end of the document. FOREWORD The nomenclature consisting of terms, definitions, abbreviations, and acronyms describing various components of the EPA defined heavy duty (HD), including CARB defined medium duty (MD), compression ignition and spark ignited engin
7、e systems has increased enormously due to the number of sophisticated electrical and electronic (E/E) systems. To bring some order to the proliferation of such nomenclature, the Electrical and Electronics Committee of the SAE Truck and Bus Council has prepared this document. This document was develo
8、ped using the SAE J1930 Vehicle E/E Systems Diagnostic Committee s document as a starting point. The nomenclature used to convey MD and HD service information is being standardized in order to more accurately convey information to technicians faced with the diagnosis and repair of increasingly compl
9、ex electronically controlled engine and vehicle systems. This includes many types and configurations of conventional mechanically controlled engines. To be properly descriptive, each type of automotive nomenclature requires a consistent methodology. This document is concerned with a methodology for
10、naming objects and systems utilizing a set of words upon which names are built. The methodology allows objects and systems to be completely described without ambiguity. It also is able to generate names which distinguish among similar objects or systems without confusion but with brevity. Using term
11、s which are well-defined within the context of the automotive service industry, the methodology allows already existing imprecise names to be suitably changed and future names to be assigned in a predictable way which will reliably convey meaning to the technician. The structure of this SAE document
12、 is open ended by design. As the need arises, additional entries can be added. Because of this flexibility, particular attention should be paid to the month and year publishing code contained in the full “J“ number designation. SAEJ2403 Revised DEC2008 - 2 - TABLE OF CONTENTS 1.SCOPE3 2.REFERENCES3
13、2.1Applicable Publications.3 2.1.1SAE Publications.3 3.HOW TO USE THIS DOCUMENT3 4.METHODOLOGY4 4.1Naming Objects.4 4.1.1Base Words.4 4.1.2Modifiers4 4.1.3Technological Terms.5 4.2Naming Systems.5 4.3Shortened Names.5 4.3.1Acronyms 5 4.3.2Abbreviations 6 4.4Indexing of Names6 4.5Alphanumeric Descrip
14、tors.6 5.NAMING OF MULTIPLE BANKS AND MULTIPLE DEVICES .7 6.CROSS REFERENCE AND LOOK UP 8 7.RECOMMENDED TERMS AND USAGE.33 8.RECOMMENDED TERMS .65 9.GLOSSARY OF TERMS.77 10.REVISION PROCEDURES 83 11.SAMPLE DIAGRAMS .83 11.1Aftertreatment General Diagram83 11.2Aftertreatment SCR Diagram.85 11.3Aftert
15、reatment Configuration with Warm Up Diesel Oxidation Catalyst, Diesel Oxidation Catalyst, it is the name of a valve which regulates the flow of air. Both modifiers are nouns functioning as adjectives because of their position. System modifiers can be added to object names to describe an objects purp
16、ose. When using a system name as a modifier in an object name, the word “System“ is not included. For example, the device that directs the exhaust gases in the Exhaust Gas Recirculation (EGR) System is named “Exhaust Gas Recirculation (EGR) Valve.“ 4.1.3 Technological Terms Technologically specific
17、terms tend to lengthen names without adding a corresponding level of useful service information about the function of an object. Add an appropriate technological modifier to a name only when it describes the primary difference between two objects. For example, the “thick film“ technology used to con
18、struct the internal circuit of an Air Flow Sensor should not be identified in the objects name. However, if necessary for clarity, it would be appropriate to differentiate the relation to a specific external provision by adding “Hot Wire“ to “Air Flow Sensor.“ A technological term should be the firs
19、t modifier conversationally (farthest from the base word, the position of least significance), unless a directional modifier is also present. 4.2 Naming Systems When constructing a name for a system, consider it to be a combination of a “concept“ and the word “System.“ Develop the concept name accor
20、ding to the rules for object naming and add the word “System.“ Keep in mind that a concepts most basic attribute is its purpose and that this attribute is described by the term closest to the word “System.“ For example, “recirculation“ is the basic attribute of the Exhaust Gas Recirculation (EGR) co
21、ncept. The group of components that embody the concept are together named the “EGR System.“ 4.3 Shortened Names Techniques of shortening, including acronyms and abbreviations, are often necessary when space is limited and when names become awkwardly long. It is preferable to create a name first and
22、its shortened form later, rather than the other way around. Abbreviations and acronyms may be constructed not only of the letters of the alphabet, but of numbers, space characters, punctuation marks (such as “/“ and “), subscripts, and any other ASCII characters. Treat the individual acronyms, modif
23、ier abbreviations, and base word abbreviations as words, separating them by space characters. 4.3.1 Acronyms Specific definitions of acronyms vary, but for the purpose of this document, an acronym is a memorable combination of the first letters of the words of a name. While abbreviations are useful
24、in text where space is limited, acronyms are particularly convenient for shortening verbal communication in addition to written materials. For this reason, acronyms are often pronounceable, which also makes them easy to remember. They are especially useful if a name is long and bulky both on paper a
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