This standard specifies the product classification, technical requirements, test methods and inspection rules for resistor-type spark plugs (hereinafter referred to as spark plugs). This standard applies to spark plugs used to suppress radio interference generated by the electric ignition system of internal combustion engines. This standard does not apply to spark plugs for aircraft engines. Items not specified in this standard shall comply with the corresponding provisions of GB 7825 "Spark Plugs". JB/T 6472-1992 Resistor-type Spark Plugs JB/T6472-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Glow Plug, Spark Plug Standard
Published by the Ministry of Machinery and Electronics Industry of the People's Republic of China
1 Subject Content and Scope of Application
Mechanical Industry Standard of the People's Republic of China
Resistance Type Spark Plug
JB/T6472-92
This standard specifies the product classification, technical requirements, test methods and inspection rules of resistance type spark plugs (hereinafter referred to as spark plugs). This standard applies to spark plugs used to suppress radio interference generated by the electric ignition system of internal combustion engines. This standard does not apply to spark plugs for aircraft engines. Items not specified in this standard shall comply with the corresponding provisions of GB7825 "Spark Plugs". 2
Reference standards
GB7825
Spark plugs
GB6784~6791
Spark plugs and their cylinder head mounting holes
GB2828
JB5882
3Product classification
Batch inspection counting sampling procedures and sampling tables M14×1.25 flat seat spark plugs with hexagonal opposite sides of 16mm and their cylinder head mounting holes The classification of spark plugs shall comply with the provisions of GB6784~6791 and JB5882. 4Technical requirements
4.1Resistance value
Under normal temperature and humidity, the resistance value between the spark plug wiring screw and the center electrode should be 3~12kQ, and other specifications of spark plugs can be agreed upon by both the supply and demand parties.
4.2 Temperature characteristics
4.2.1 The resistance value change rate of the spark plug at 150±10℃ for 2h and after cooling to room temperature in air shall comply with the provisions of Table 1.
Test temperature
Rate of change relative to resistance value before test
Heating state
After cooling
4.2.2 After the spark plug tested in 4.2.1 is kept at 300±10℃ for 20min and immediately cooled to room temperature in air, its resistance value change rate shall comply with the provisions of Table 1.
4.3 Vibration resistance
The spark plug shall be able to withstand vibration with an amplitude of 22mm, a frequency of 6.5~7.0Hz, and a duration of 10min. After the test, the spark plug should not have abnormal phenomena such as cracking, damage, cracking and falling of the side electrode, and the change of its resistance value should not exceed ±10% of the resistance value before the test. Approved by the Ministry of Machinery and Electronics Industry on August 6, 1992, 16
Implementation on January 1, 1993
4.4 Durability
JB/T6472-92
After the spark plug sparks in the air for 250 hours and is placed at room temperature for 1 hour, the change of its resistance value should not exceed ±30% of the resistance value before the test. 5 Test method
5.1 Resistance value determination
According to the provisions of Article 4.1 of this standard, use a digital multimeter to measure its resistance value at room temperature and humidity. 5.2 Temperature characteristic test
5.2.1 According to the provisions of Article 4.2 of this standard, place the sample in a special heating device, raise the temperature to 150±10℃ at a uniform rate, keep it warm for 2h, and then use a digital multimeter to measure its resistance value.
5.2.2 After the test in Article 5.2.1, cool the sample in the air to room temperature, and use a digital multimeter to measure its resistance value. 5.2.3 After the test in Article 5.2.2, place the sample in a special heating device, raise the temperature from room temperature to 300±10℃, keep it warm for 20min, then cool the sample to room temperature, and use a digital multimeter to measure its resistance value. 5.3 Vibration resistance test
Perform the test according to the test methods specified in Article 4.3 of this standard and Article 4.5 of GB7825, then use a digital multimeter to measure its resistance value and visually inspect its appearance.
5.4 Durability test
According to the provisions of Article 4.4 of this standard, install the sample on the device specified in Figures 1 and 2 or on other similar devices. After continuous sparking for 250 hours (interruption time due to failure of the test device is allowed to be no more than 2 hours), use a digital multimeter to measure its resistance value. Figure 1 Wiring diagram for spark test of resistance type spark plug 1-DC regulated power supply 14V,
3—Ignition coil:
5—Spark plug;
7—Circuit breaker cam:
9—1.5 level, 030V voltage meter.
2—1.5 level, 0~5A current meter
4—Distributor, 800r/min;
6—Three-pole needle distance 10mm;
8—Capacitor:
Note: The tip of the electrode should be made into an acute angle.
Inspection rules
JB/T6472—92
Vertical type
6.1 The inspection of spark plugs is divided into factory inspection and type inspection. 6.1.1 Factory inspection
6. 1. 1. 2
60 degree type
Three-pole needle gap
Spark plugs should be inspected by the inspection department of the manufacturer before leaving the factory, and should be accompanied by a product quality certificate. Spark plugs should be inspected in batches, and each batch of products made by the same process method should not exceed 35,000. Samples shall be randomly selected according to GB2828 and Table 2, and tested according to the procedures specified in Table 2. If the appearance, size, resistance value and spark performance do not meet the requirements of the factory inspection, it is allowed to be inspected one by one. Table 2 Spark plug factory inspection items
Sampling basis
Test items
Appearance and size
Resistance value
Ignition performance
Temperature characteristics
Fracture resistance
Hot sealing
Side electrode bending strength
Tension load of wiring screw
Note: 1) Refers to the size of the grade pattern.
6.1.2 Hazard test
Test basis
Articles 2.1, 2.2,
3.1, 3.2 and 3.3 of GB7825
Article 4.1 of this standard
Article 3.5 of GB7825
Article 4.2 of this standard
Article 4.3 of this standard
Article 3.7 of GB7825
Article 3.9 of GB7825
Article 3.10 of GB7825
Test method
Articles 4.1 of GB7825 and
Article 5.1 of this standard
GB782 5Article 4.4
Article 5.2 of this standard
Article 5.3 of this standard
Article 4.6 of GB7825
Article 4.8 of GB7825
Article 4.9 of GB7825
Type of sampling plan
Sampling once
Main dimensions\
Other dimensions
Sampling once
Second sampling
Quality level
Inspection level
When changing the raw material formula and main process of the product and the normal production, all tests must be carried out according to the items and sequence specified in Table 3. During the test, if any of the tests of a spark plug fail, the type inspection is not qualified. For normal production products, type inspection should be carried out at least once every three years. 18
Test items
Appearance and dimensions
Resistance value
Fire performance
Temperature characteristics
Vibration resistance
Hot sealing
Over torque
Bending strength of side electrode
Tensile load of terminal screw
Shell strength
High temperature insulation resistance
Heat value dispersion
Acid durability
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JB/T 647292
Table 3 Spark plug type inspection items
Test basis
Articles 2.1, 2.2, 3.1,
3.2 and 3.3 of GB7825
Article 4.1 of this standard
Article 3.5 of GB7825
Article 4.2 of this standard
Article 4.3 of this standard
Article 3.7 of CB7825
Article 3.8 of GB7825
Article 3.9 of GB7825
Article 3.10 of GB7825| |tt||Article 3.4 of GB7825
Article 3.11 of GB7825
Article 3.12 of CB7825
Article 3.13 of GB7825
Article 4.4 of this standard
Test method
Article 4.1 and
Article 5.1 of this standard
Article 4.4 of CB7825
Article 5.2 of this international standard
Article 5.3 of this international standard
Article 4.6 of GB7825
Article 4.Article 7
Article 4.8 of GB7825
Article 4.9 of GB7825
Article 4.3 of GB7825
Article 4.10 of GB7825
Article 4.11 of GB7825
Article 4.12 of GB7825
Article 5.4 of this standard
After test No. 1
After test No. 2
After test No. 3 After test
After test No. 3
After test No. 5After test No. 3After test No. 5, 6After test No. 7
After test No. 8
After test No. 2
After test No. 10
After test No. 3, 6After test No. 3, 6After
As needed
The standard is proposed and managed by Nanjing Spark Plug Research Institute of the Ministry of Machinery and Electronics Industry. Nanjing Spark Plug Research Institute is responsible for drafting, and Nanjing Electric Porcelain General Factory and Zhuzhou Fire North Cold Factory participated in the drafting. The main drafters of the macro standard are Gao Fenggang, Ni Lingzhen, Yang Baolin, and Chen Guangyun. This standard adopts JISB8031-1990 "Spark Plugs for Internal Combustion Engines" by reference. 19
Mechanical Industry Standard of the People's Republic of China
Electric glow plug and spark plug standard
Edited, published and distributed by the Standardization Research Office of the First Equipment Department of the Mechanical and Electronic Industry Ministry and the Mechanical and Electronic Industry Standardization Research Institute
(No. 302, Xiashesi Street, Xiangtan City, Hunan Province)
Printed by the Printing Plant of Xiangtan Electric Motor Factory
Book size 880×1230
First edition in May 1993
Sheet 1 Word count 36000
First printing in May 1993
Printing number
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