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GB/T 6791-2012 English PDF

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GB/T 6791-2012: Road vehicles -- Spark-plugs and their cylinder head housing -- Basic characteristics and dimensions
Status: Valid

GB/T 6791: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 6791-2012English559 Add to Cart 5 days [Need to translate] Road vehicles -- Spark-plugs and their cylinder head housing -- Basic characteristics and dimensions Valid GB/T 6791-2012
GB/T 6791-1986English199 Add to Cart 2 days [Need to translate] Spark plug M18*1. 5 with conical seating and cylinder head housing Obsolete GB/T 6791-1986

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Basic data

Standard ID GB/T 6791-2012 (GB/T6791-2012)
Description (Translated English) Road vehicles -- Spark-plugs and their cylinder head housing -- Basic characteristics and dimensions
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard T37
Classification of International Standard 43.060.30
Word Count Estimation 24,243
Older Standard (superseded by this standard) GB/T 6791-1986; GB/T 6789-1999; GB/T 6788-1986; GB/T 6787-1986; GB/T 6786-1986; GB/T 6785-1999; GB/T 6784-1999
Quoted Standard GB/T 192; GB/T 193; GB/T 197; GB/T 2516
Adopted Standard ISO 28741-2009, MOD
Regulation (derived from) National Standards Bulletin No. 41 of 2012
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the main characteristics of the spark plug and sizes, including a terminal block and cylinder head mounting hole dimensions. This standard applies to road vehicles with spark ignition engines spark plugs.

GB/T 6791-2012: Road vehicles -- Spark-plugs and their cylinder head housing -- Basic characteristics and dimensions


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS43.060.30 T37 National Standards of People's Republic of China Replacing GB/T 6784 ~ 6785-1999, GB/T 6786 ~ 6788-1986, GB/T 6789-1999, GB/T 6791-1986 Road vehicles spark plug and cylinder head mounting holes Basic characteristics and dimensions (ISO 28741.2009, MOD) Issued on. 2012-12-31 2013-07-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Preface Ⅰ 1 Scope 1 2 Normative references 1 3 Terms and definitions 4 Terminal 2 5 basic dimensions, thread and related terms 4 6 spark plug and cylinder head mounting holes 6 other sizes 7 6 Installation moment 8 spark plug size 6 9 spark plug cylinder head mounting holes 15 Appendix A (normative) Semi-thread the spark plug and cylinder head mounting holes 18 Annex B (informative) cylinder head cone seat and flat seat universal spark plug mounting hole 19

Foreword

This standard rule according to GB/T 1.1-2009 given draft. This standard replaces GB/T 6784-1999 "M10 × 1 spark plugs with flat seating and their cylinder head mounting holes", GB/T 6785-1999 "M12 × 1.25 spark plugs with flat seating and their cylinder head mounting holes", GB/T 6786-1986 "M14 × 1.25 spark plugs with flat seating and their cylinder head Mounting holes ", GB/T 6787-1986" M14 × 1.25 low profile flat seat spark plug and cylinder head mounting holes ", GB/T 6788-1986 "M14 × 1.25 low cone seat spark plug and cylinder head mounting holes", GB/T 6789-1999 "M14 × 1.25 taper seat spark plugs and gas Cylinder head mounting holes ", GB/T 6791-1986" M18 × 1.5 Cone seat spark plug and cylinder head mounting holes. " Compared with the previous version of the standard, the major technological change of this standard are as follows. --- Increased 29 kinds of spark plug types of specifications (see Table 5 and Table 7); --- Added other dimensions of the spark plug (see Tables 6 and 8); --- An increase of seven kinds of spark plug cylinder head mounting hole size (see Table 9 and Table 10); --- Increased Chapter 3 Terms and definitions. This standard uses redrafted law, modify the use of ISO 28741.2009 "Road vehicles - the spark plug and cylinder head mounting hole basic Features and size. " The relative standard ISO 28741.2009 (E) editorial changes as follows. "." --- With the decimal point as the decimal comma instead of the original ""; --- Delete international standard preamble. The relative standard ISO 28741.2009 Main changes are as follows. --- Changes Chapter 1 Scope, added "This standard applies to road vehicles spark ignition engine with spark plug." --- Chapter 2 Normative references file changes. The present standard adjustments made to apply to our technical conditions, adjust the focus reflected in Chapter 2, "Normative text Member ", the specific adjustments are as follows. ● to modify using ISO 68-1 of GB/T 192 replaced ISO 68-1 (see 4.2, 5.3); ● to modify the use of ISO 261 GB/T 193 instead of ISO 261 (see 4.2, 5.3); ● to modify using ISO 965-1 of GB/T 197 replaced ISO 965-1 (see 5.3); ● to modify using ISO 965-3 of GB/T 2516 instead of ISO 965-3 (see 5.3). ● Remove the ISO 28741. ISO 4095 aerospace twelve-point drive wrench shape Metric system referenced in 2009 Columns and ISO 6518-1 road vehicle ignition systems - Part 1. Vocabulary two criteria. --- Increasing the spark plug and cylinder head mounting holes Specification Type. ● Chapter 8 Table 5 8.1 adds the following two types of specifications spark plug. M12 × 1.25 flat hexagonal edge 17.5mm Block spark plug and M12 × 1.25 on the side of the hexagon 16mm thread length 12.7mm flat seat spark plug; ● Chapter 8 Table 6 increased 8.1 M12 × 1.25 hexagonal flat seat edge 17.5h13 other dimensions of the spark plug; ● Chapter 9 9 Table 9.1 adds M12 × 1.25 hexagonal edge 17.5mm spark plug spark plug cylinder head flat seat Mounting hole size. --- This standard and ISO 28741.2009 clauses structure made the following adjustments. ISO 28741. Compact spark plug terminals in 2009 Appendix B recommended that part of the adjustment to this standard Chapter 4 terminals in Appendix B. Appendix C to be postponed This standard by the National Automotive Standardization Technical Committee (SAC/TC114) centralized. This standard was drafted. China Automotive Technology and Research Center, Zhuzhou Torch Spark Plug Co., Ltd., Nanjing Huade Spark Plug Co. the company. The main drafters of this standard. Chenguang Yun, Chen Ming pieces, Xie Wenjie, Xiao Lihua, Houjiang Feng, Zhang Yang Zhi, Mu Yang Hui, Chen double, Deng Xianghong, Dude Kui. This standard replaces GB/T 6784-1999, GB/T 6785-1999, GB/T 6786-1986, GB/T 6787-1986, GB/T 6788-1986, GB/T 6789-1999, GB/T 6791-1986. The previous versions of GB/T 6784-1999 release case. --- GB/T 6784-1986. The previous versions of GB/T 6785-1999 release case. --- GB/T 6785-1986. The previous versions of GB/T 6789-1999 release case. --- GB/T 6789-1986. Road vehicles spark plug and cylinder head mounting holes Basic characteristics and dimensions

1 Scope

This standard specifies the spark plug of the main features and size, including the size of the terminal block and the cylinder head mounting holes. This standard applies to road vehicles of spark ignition engines with spark plugs.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated edition applies to this article Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 192 ordinary screw threads - Basic model (GB/T 192-2003, ISO 68-1.1998, MOD) GB/T 193 Series common thread diameter and pitch (GB/T 193-2003, ISO 261.1998, MOD) GB/T 197 common thread tolerance (GB/T 197-2003, ISO 965-1.1998, MOD) GB/T 2516 common thread limit deviation (GB/T 2516-2003, ISO 965-3.1998, MOD)

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Installation height L instaledheight Distance from the terminals at the top of the point of contact with the spark plug to the cylinder head, including the thickness of the gasket according to the specified torque after tightening. Note. For the purposes of the taper seat spark plug, the contact point is the reference point of the sealing surface. 3.2 Spark plug thread size spark-plugthreadsize The spark plug and cylinder head connection thread nominal size. NOTE. This is the standard metric thread, except M14 × 1.25 thread. 3.3 Hex/double hexagon hexagon/bi-hexagon Install the spark plug and spark plug contact surface of the sleeve housing. NOTE. There are 12 double hexagon install contact surface, the spark plug 12 is installed mounting sleeve contact surfaces. 3.4 Cone seat conicalseating Parts of the spark plug and cylinder head sealed housing, which form parts with cone seal. NOTE. There is such a spark plug and gasket between the cylinder head sealing surface. 3.5 Flat seat flatseating Parts of the spark plug and cylinder head seal housing on the site of a planar form seal, and the seal surface is perpendicular to the axis of the spark plug. NOTE. There is such a spark plug and gasket between the cylinder head sealing surface.

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