JB/T 8580-1997 JB/T 8580-1997 Technical requirements for silicon nitride glow plugs for diesel engines JB/T8580-1997 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T8580--1997
Silicon Nitride Glow Plugs for Diesel Engines
Technical Conditions
Published on June 20, 1997
Ministry of Machinery Industry of the People's Republic of China
Implementation on January 1, 1998
JB/T8580-1997
This standard adopts ISO7578-1986 "Road Vehicles-General Requirements and Test Methods for Enclosed Glow Plugs" in a non-equivalent manner. The main difference between silicon nitride glow plugs and traditional metal glow plugs is that the heating element is silicon nitride ceramic, and its various performances are better than metal glow plugs. The main technical indicators specified in this standard are higher than those specified in JB5783-91 "Technical Conditions for Enclosed Glow Plugs". Appendix A and Appendix B of this standard are both suggestive appendices. This standard is proposed and managed by the National Technical Committee for Standardization of Internal Combustion Engines. The drafting units of this standard are: Shanghai Internal Combustion Engine Research Institute of the Ministry of Machinery Industry, Laiyang Power Machinery General Factory. The main drafters of this standard are: Chen Hongzhi, Chen Changming, Shi Yuhe. 1
1 Scope
Machinery Industry Standard of the People's Republic of China
Silicon Nitride Glow Plugs for Diesel Engines
Technical Conditions
JB/T8580-—1997
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging of silicon nitride glow plugs for diesel engines (hereinafter referred to as glow plugs).
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB 2828-87
JB325991
JB5784—91
3 Product classification
Batch inspection counting sampling procedure and sampling table (applicable to continuous batch inspection) Type and size of closed type glow plug
Test method of closed type glow plug
3.1 The type and size of glow plug shall comply with the provisions of JB3259. 3.1.1 The size and tolerance of glow plug shall be shown in Appendix A (suggestive appendix). 3.1.2 The size and tolerance of cylinder head mounting hole for glow plug shall be shown in Appendix B (suggestive appendix) 3.2 When the power supply voltage of glow plug is 12V and 24V, its rated voltage is 1IV and 23V. 3.3 Marking method of glow plug
3.3.1 Appearance of glow plug
The appearance of glow plug is shown in Figure 1.
Virtual part
Figure 1 Appearance of glow plug
3.3.2 Glow plug marking
The glow plug marking consists of the following parts:
Approved by the Ministry of Machinery Industry on June 20, 1997
Implemented on January 1, 1998
C-Ceramic
Glow plug
3.3.3 Marking example
N-Normal type
Q-Quick type
JB/T8580-1997
Screw thread
Diameter D
1-10mm
2-12mm
4-14mm
8-18mm
1-40mm| |tt||2-45mm
3-50mm
5-60mm
6-65mm
7-70mm
8-75mm
9-105mm
1-20mm
2-25mm
3-30mm
Ordinary type, screw thread diameter 10mm, power supply voltage 12V, screw length (L) 65mm, heating element length (L,) 20mm glow plug:
CN12-61JB/T8580
4 Technical requirements
4.1 The glow plug shall be manufactured according to the product drawings and technical documents approved by the prescribed procedures and comply with the provisions of this standard. 4.2 The surface of metal parts should be smooth and free of cracks and burrs. The threaded part should not be defective or deformed. The heating element should not have cracks, damage or defects that affect its performance.
4.3 Sealing performance
The glow plug should be placed under a pressure of 4MPa for 15s, and continuous air leakage is not allowed in its sealing part. 4.4 Cold resistance
When the room temperature is 23±5℃, the cold resistance value of the glow plug shall meet the following requirements:12V glow plug
24V glow plug
4.5 Heating time
When the room temperature is 23±5℃, the glow plug is at its rated voltage±0.1V, and within 8mm of the end of the heating element, the power-on time for the surface temperature to reach 850℃ should be less than or equal to 10s, and the power-on time for the surface temperature to reach 1000℃ should be less than or equal to 30s.4.6 Stable working current
JB/T8580-1997
The working current of the glow plug at its rated voltage±0.1V for 20s shall not exceed 8A. 4.7 Overvoltage performance
After the glow plug is subjected to 125% of its rated voltage for 15s, the heating element shall not show cracks, damage, uneven heating and local bright spots, etc. The glow plug shall still comply with the provisions of this standard. 4.8 Overload performance
Apply three different test voltages to the glow plug in the following order, each lasting 2min. The glow plug after the test shall still comply with the provisions of this standard.
a) Rated voltage:
b) 110% of the rated voltage;
c) 115% of the rated voltage.
4.9 Power-on and power-off durability
The glow plug shall be powered on for 15s and off for 15s as one cycle under the condition of 110% of its rated voltage. After repeated cycles of 10,000, the glow plug shall not show any abnormal phenomenon.
4.10 Service life
The random service life of the glow plug shall be greater than or equal to 2000h. 4.11 Vibration durability performance
The vibration durability performance requirements of the glow plug shall be agreed upon by the supply and demand parties. 4.12 Test method
The test method of the glow plug shall comply with the provisions of JB5784. 5 Inspection rules
The glow plug can only leave the factory after passing the inspection of the manufacturer's inspection department, and shall be accompanied by a product quality certificate. The factory inspection items shall comply with the provisions of 4.2~4.6. 5.2
5.3 Type test
5.3.1 Type inspection shall be carried out in any of the following situations: a) Product finalization identification;
b) Product structure, materials, and processes have changed significantly;) After one year of normal production:
d) When resuming production after a long period of suspension:
e) When there is a significant difference between the factory inspection or user sampling and the last type test: When required by the superior department.
5.3.2 The type test of the glow plug shall be carried out in accordance with the items and sequence specified in Table 1. 3
Test items
Appearance and dimensions
Sealing performance
Cold resistance
Heat-up time
Stable working current
Overvoltage performance
Overload performance
On-off durability
Service life
Vibration durability
JB/T8580-1997
Test basisbzxZ.net
Sampling quantity
8 after test No. 1
After test No. 1, 8 pieces after test 2
8 pieces after test 1, 2, 3
8 pieces after test 1~4
4 pieces after test 1~5
4 pieces after test 1~5
1 piece after test 1
Another sample
Another sample
When the user conducts random inspection of product quality, the AQL value of the qualified quality level shall be agreed upon by the supply and demand parties in accordance with the provisions of GB2808. 5.4
Marking and packaging
Each glow plug shall be marked with:
a) manufacturer's name or trademark;
b) model and voltage.
Each packaging box shall be marked with:
a) manufacturer's name and trademark;
b) product name, model and voltage.
The packaging box for multiple items should be marked with:
a) Manufacturer's name and trademark
b) Product name, model and voltage;
c) Product quantity.
6.4 The packaging box should be marked with:
a) Manufacturer's name and trademark
b) Product name, model, voltage and quantity. 5 Product packaging boxes can be made of cartons, wooden boxes or other packaging materials, and their total weight should not exceed 20kg. 6.5
For products with export or special requirements, their markings and packaging can be agreed upon by both the supplier and the buyer6.6
JB/T8580-1997
Appendix A
(Suggested Appendix)
Dimensions and tolerances of glow plugs
A1 Dimensions and tolerances of glow plugs (heating part diameter 5mm) are shown in Figure Al. D (six single pairs)
Glow plug type
M10X1.25-6e
M12X1.25-6e
20 -1,251,H0±
: Glow plug with a heating part diameter of 5mm
123°±19
or 93°±10
JB/T8580-1997
A2 Dimensions and tolerances of glow plugs (heating part diameter 6mm) are shown in Figure A2. aa
P (hexagonal opposite sides)
Glow plug type
M12x1.25-6e
20±1,25±1,3n=1
Figure A2 Glow plug with 6mm diameter of heating part
mT-0+
JB/T8580—1997
Appendix B
(Suggestive Appendix)
Dimensions and tolerances of cylinder head mounting holes for glow plugs B1 The dimensions and tolerances of cylinder head mounting holes for glow plugs (heating part diameter 5mm) are shown in Figure B1. @0.2@
Glow plug type
MI0X125-6H
MI2X1.25-6H
Glow plug (heating part diameter 5mm) cylinder head mounting hole G2
120±1° or
JB/T8580-1997
B2 glow plug (heating part diameter 6mm) cylinder head mounting hole dimensions and tolerances see Figure B2. .a
Glow plug type
M12X125-6H
Figure B2 Glow plug (heating part diameter 6mm) Cylinder head mounting hole mm
Mechanical industry standard
Silicon nitride glow plug for diesel engine
Technical conditions
JB/T8580—1997
Published by Mechanical Science Research Institute
Printed by Mechanical Science Research Institute
（ No. 2, Shouti South Road, Beijing, Postal Code 100044)*
Format 880×12301/16
Printing Sheet 3/4 Words 18000
First Edition September 1997
First Printing September 1997
Print Quantity 1-500
Price 1000 Yuan
Mechanical Industry Standard Service Network: http:/hvwwJB.ac.cnL6610858 /
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