This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of electric fuel pumps for engines (hereinafter referred to as "fuel pumps"). This standard is applicable to low-pressure fuel delivery pumps for various carbureted engines or fuel injection engines. QB/T 1821-1993 Electric Fuel Pumps for Engines QB/T1821-1993 Standard download decompression password: www.bzxz.net

Light Industry Standard of the People's Republic of China
Electric Fuel Pump for Engine
Subject Content and Scope of Application
QB/T 1821—1993
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of electric fuel pumps for engines (hereinafter referred to as "fuel pumps"). This standard applies to low-pressure fuel delivery pumps for various carburetor engines or fuel injector engines. 2 Reference standards
GB/T191 Packaging storage and transportation graphic signs
GB/T4942.1 Motor housing protection grade
GB/T4942.2
Low-voltage electrical enclosure protection grade
JB/T8 Product label
JB/T1671
Mechanical diaphragm gasoline pump test method
General technical conditions for packaging of electromechanical products
JB/T27592
JB/T3604
Mechanical diaphragm gasoline pump
ZB T35 001
3 Product classification
Basic technical conditions of automotive electrical equipment
Type: Fuel pumps are divided into gasoline engine fuel pumps and diesel engine electric fuel pumps according to engine characteristics. Basic parameters should comply with the provisions of Table 1.
Rated voltage/V(DC)
Free flow not less than/(L/h)
Cut-off pressure/MPa
Working nature
12V ordinary type
0.020～0.030
12V trace type
0. 012~~0.020
Continuous working system (no liquid air pump shall not exceed 30min) Note: When there are special requirements for free flow and cut-off pressure, the negotiated values ​​between the supply and demand parties can be used. 3.3 Model
24V Ordinary Type
The product model consists of professional code, type code, voltage level, drive mode, variety code and design program number. a.
Model Representation Method
Approved by the Ministry of Light Industry of the People's Republic of China on July 29, 1993 and implemented on March 1, 1994
b. Model example
Example: QBC21102 electric fuel pump
QB/T 1821—1993
Design procedure number (indicated by two Arabic numerals)Drive mode (1 for transistor type, 2 for electromagnetic contact type, 3 for motor type)Variety code (low-pressure oil pump)
Voltage level (1 for 12V, 2 for 24V)Type code (Q for gasoline pump, C for diesel pump)Automobile oil pump professional code (indicated by capital Chinese pinyin letters QB)Indicates that the oil pump type is a low-pressure automobile-specific electric oil pump for diesel engines with a voltage of 24V, and also indicates that the pump drive mode is transistor type, which is a second design product. 4 Technical requirements
4.1 The free flow of the oil pump shall comply with the provisions of Table 1. 4.2 The cut-off pressure of the oil pump shall comply with the provisions of Table 1. 4.3 Durability
After the oil pump has been in normal operation for 500 hours, its free flow value shall not be less than 90% of that before operation, and the cut-off pressure shall be within the range of Table 1, and its main working parts shall not have significant defects.
4.4 The oil pump shall have good sealing to ensure no fuel leakage. 4.5 High and low temperature resistance range of the oil pump
a. Ambient temperature: -35～+50℃, b. Working medium temperature: 30~～+45℃. 4.6 When the working voltage varies within the range of 0.9～1.25 times of the rated voltage, the oil pump shall work normally, and the oil output shall be more than 80% of the specified value.
4.7 The dielectric strength of the oil pump coil to the shell insulation medium shall comply with the provisions of Article 15 of Chapter 3 of ZBT35001, and there shall be no breakdown phenomenon when subjected to 50Hz and a test voltage of 550V for 1min. 4.8 The vibration resistance of the oil pump shall comply with the provisions of Table 2 and Table 3 in ZBT35001. After the product is vibrated, the parts shall not be damaged, the fasteners shall not be loose, and the parameters shall comply with the provisions of Table 1.
4.9 The protection level of the oil pump shall comply with the relevant provisions of GB/T4942.1 and GB/T4942.2, among which the protection level of the oil pump shall be 5 (dustproof) to prevent foreign objects and human contact with the interior, and 4 (moisture-proof) to prevent water from entering the interior. 4.10 There must be an import or export mark on the oil pump. 4.11 The type of the inlet and outlet pipe joints of the oil pump shall comply with the provisions of JB/T3604. 4.12 There must be a voltage polarity mark on the wire terminal, and the polarity of the pump connector can be distinguished by the color of the wire. 4.13 The surface of the oil pump shell shall not have scratches, cracks, shrinkage holes, deformations and other defects that affect the operation and performance of the oil pump that affect the surface quality. 5 Test methods
5.1 The free flow of the oil pump shall be tested on a special test bench for oil pumps (see Appendix A) and shall comply with the provisions of Table 1. 5.2 The cut-off pressure of the oil pump shall be tested on a special test bench for oil pumps and shall comply with the provisions of Table 1. 5.3 The durability test of the oil pump shall be carried out on a special test bench for oil pumps. The total working hours shall not be less than 500h, and the various parameters shall be qualified if they meet the requirements of Article 4.3. The test time is allowed to be accumulated. 5.4 The sealing test of the oil pump shall be carried out on a special test bench for oil pumps. When the oil outlet is closed, the oil pump shall be qualified if it works continuously for 3 minutes without leakage.
QB/T1821-1993
5.5 High and low temperature resistance test of oil pump: put the oil pump and the test oil into a low temperature box with a low temperature of -35±2℃ and a high temperature box with a high temperature of 50±2℃, keep it warm for 2 hours without working, and then test its working ability in the temperature box. The parameters should meet the requirements of Table 1. If the oil pump is to be taken out of the temperature box for testing, the high temperature measurement should be completed within 2 minutes and the low temperature measurement should be completed within 5 minutes. The parameters should meet the requirements of Table 1. 5.6 The voltage fluctuation test is carried out on a special test bench for oil pumps. The power supply output voltage fluctuates at 0.9 to 1.25 times the rated voltage. The oil output of the oil pump should meet the requirements of Article 4.6.
5.7 The oil pump withstand voltage test is carried out in accordance with Article 3.15 of ZBT35001. 5.8 The oil pump vibration resistance test is carried out in accordance with the relevant provisions of ZBT35001. 5.9 The protection level test of the oil pump shall be carried out in accordance with the relevant provisions of GB/T.4942.1 and GB/T4942.2. The dustproof test shall be carried out in accordance with the provisions of Chapter 5 and Table 3 of GB/T4942.2. The manufacturer may also negotiate with the user to formulate the test method. The test method for waterproofing the interior shall be carried out in accordance with the provisions of Table 4 of GB/T4942.2. 6 Inspection rules
6.1 Each oil pump shall be inspected and qualified by the department before it can be shipped out of the factory, and shall be accompanied by a certificate of conformity or a certificate of conformity. 6.2 The factory inspection items are 4.1, 4.2, 4.4, and 4.13. 6.3 The type inspection items are 4.1 to 4.13, and all data shall meet the technical requirements. The number of oil pumps to be sampled is six of the same model. If one of them fails, the number of pumps to be inspected shall be doubled. If it fails again, the manufacturer should take measures immediately, eliminate the defects, and re-test. If the product passes the test, it is a qualified product. 6.4 Type inspection should be carried out when one of the following situations occurs. Trial type identification of new products or old products transferred to the factory for production; a. bzxZ.net
After formal production, if there are major changes in structure, materials, and processes; regular or accumulated a certain amount of production, a periodic inspection should be carried out every two years; c.
When the product is resumed after a long period of suspension; e.
When the national quality supervision agency proposes a requirement for type inspection. 7 Marking, packaging, transportation, storage
There should be a registered trademark on the oil pump housing.
7.2 The oil pump should have a product label fixed in a conspicuous position, and the label should comply with JB/T8 regulations. Label content:
a. Product model and name;
b. Main parameters;
Full name and address of the manufacturing unit.
7.3 The packaging of the oil pump shall comply with the provisions of Article 3 and Article 5 of Chapter 1 of JB/T2759. 7.3.1 When packaging the oil pump in units of single units, care should be taken not to allow the test oil inside the oil pump to leak out. The product certificate should be included in the package, and the information on the label should be displayed on the oil pump packaging box. 7.3.2 When the oil pump is supplied in batches, it can be packaged in cartons of 10 or 20 units. The oil pumps should be placed in cartons after being packaged individually. The outer surface of the carton should be printed with the information on the product label, as well as the "handle with care" mark and the "afraid of moisture" mark, and should comply with the provisions of GB/T191.
7.3.3 After the outer packaging is sealed, it should be tied with polypropylene plastic tape, oxidized steel tape or other materials in accordance with the provisions of JB/T2759. 7.4 The oil pump should be stored in a well-ventilated warehouse with a relative humidity of no more than 80% and no corrosive gas. 341
QB/T1821—1993
Appendix A
Electric fuel pump test bench
(Supplement)
a, b, c—Oil circuit switch; P--pressure gauge; QB-Oil pump; A-ammeter; Z-vacuum gauge; V-voltmeter The sum of the length of the inlet and outlet oil pipes of the oil pump should be greater than 1.5 m, and the inner diameter of the oil pipe should be between 4 and 8 mm. Additional remarks:
This standard was proposed by the Technical Equipment Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Light Industry Machinery Standardization Center. This standard was drafted by Shanghai Feichi Automobile Oil Pump Factory. The main drafter of this standard is Li Lin.
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