GB/T 19910-2022 英文版 汽車發(fā)動機電子控制系統(tǒng)修理技術要求

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Foreword

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Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.

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This document is developed in accordance with the rules given in GB/T 1.1-2020?Directives for standardization—Part 1: Rules for the structure and drafting of standardizing documents.

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This document replaces GB/T 19910-2005?Technical requirements for electronic control system of motor-vehicles engine being overhauled.?In addition to structural adjustments and editorial changes, the following main technical changes have been made with respect GB/T 19910-2005:

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a) ?The statement for “scope” is modified (see Clause 1 hereof; Clause 1 of Edition 2005);

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b) ?The term “engine electronic control system” and its definition are modified (see 3.1 hereof; 3.1 of Edition 2005);

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c) ?The terms "intake and exhaust control system", "fuel control system", "computer control system" and "self-diagnosis function" and their definitions are deleted (see 3.2 to 3.5 of Edition 2005);

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d) ?The terms "over-the-air upgrade", "freeze data", "signal wave form", "on vehicle status" and "off vehicle status" and their definitions are added (see 3.2 to 3.6 hereof);

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e) ?The clause “abbreviations” is added (see Clause 4);

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f) ?The requirement of “inspection before maintenance” is deleted (see 4.1 of Edition 2005);

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g) ?The requirement of "maintenance as appropriate" is deleted (see 4.2 of Edition 2005);

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h) ?The requirement of "inspection after maintenance" is deleted (see 4.3 of Edition 2005);

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i) ?The requirement of “general requirements” is added (see Clause 5 hereof);

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j) ?The requirement of “operation procedure” is added (see Clause 6 hereof);

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k) ?The requirement of "incoming inspection" is added (see Clause 7 hereof);

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l) ?The requirement of “technology requirements of operation” is added” (see Clause 8 hereof);

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m) ?The requirement of “test on completion” is added (see Clause 9 hereof);

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n) ?The requirement of “quality assurance period” is added (see Clause 10 hereof).

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Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.

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This document was proposed by the Ministry of Transport of the People's Republic of China.

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This document is under the jurisdiction of the National Technical Committee of Automobile Maintenance and Repair Standardization (SAC/TC 247).

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This document was firstly issued in 2005; and this edition is the first revision.

Technical requirements for repair of automotive engine electronic control system

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1 ?Scope

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This document specifies the general requirements, operation procedure, incoming inspection, technology requirements of operation, test on completion and quality assurance period for repair of automotive engine electronic control system.

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This document is applicable to the repair of automotive engine electronic control system, and and may be used as a reference for the repair of engine electronic control system of other types of vehicles.

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2 ?Normative references

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The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

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GB/T 5624Motor vehicle maintenance and repair terms

JT/T 816Service specification for motor vehicle maintenance

QC/T 29106Technical specification of automobile wire harness

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3 ?Terms and definitions

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For the purposes of this document, the terms and definitions given in GB/T 5624 and the following apply.

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3.1

engine electronic control system

system for analyzing and processing various parameters ?in engine operation to accurately control the engine working condition according to the information of each sensor

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3.2

over-the-air upgrade

technology for wireless downloading or updating the automobile software and or modifying the corresponding settings of the automobile through a mobile network terminal device

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3.3

freeze data

instantaneous operation data of the engine recorded by the electronic control unit (ECU) when the fault indicator light is turned on

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3.4

signal wave form

graph of signal parameters changing with time

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3.5

on vehicle status

status in which components are not removed from the vehicle

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3.6

off vehicle status

status in which components are removed from the vehicle

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4 ?Abbreviations

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For the purposes of this document, the following abbreviations apply.

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ECU: electronic control unit

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KOEO: key on engine off

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KOER: key on engine run

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OBD: on board diagnostics

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OTA: over-the air technology