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GB/T 25984.1-2010 English PDF (GBT25984.1-2010)

GB/T 25984.1-2010 English PDF (GBT25984.1-2010)

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GB/T 25984.1-2010: Automobiles electric fuel pump -- Part 1: Brush electric fuel pump

This Part of GB/T 25984 specifies the classification, requirements and test methods of brush electric fuel pump of gasoline or diesel engine fuel supply system for automobiles. This Part is applicable to brush electric fuel pump.
GB/T 25984.1-2010
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 43.040.10
T 36
Automobiles Electric Fuel Pump -
Part 1: Brush?€?s Electric Fuel Pump
ISSUED ON: JANUARY 10, 2011
IMPLEMENTED ON: MAY 1, 2011
Issued by: General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Classification ... 5
5 Requirements... 5
6 Test Methods ... 10
7 Inspection Rules ... 18
8 Marking, Packaging, Storage and Safekeeping ... 21
Automobiles Electric Fuel Pump -
Part 1: Brush?€?s Electric Fuel Pump
1 Scope
This Part of GB/T 25984 specifies the classification, requirements and test methods of brush?€?s electric fuel pump of gasoline or diesel engine fuel supply system for automobiles (hereinafter referred to as fuel pump).
This Part is applicable to brush?€?s electric fuel pump.
2 Normative References
Through the reference in this Part of GB/T 25984, clauses in the following documents become clauses of this Part. In terms of references with a specific date, all the subsequent modification lists (excluding corrected content) or revised editions are not applicable to this Part. However, all parties that reach an agreement in accordance with this Part are encouraged to explore the possibility of adopting the latest version of these documents. In terms of references without a specific date, the latest version is applicable to this Part.
GB/T 191 Packaging - Pictorial Marking for Handling of Goods
GB/T 16539 Acoustics - Determination of Sound Power Levels of Noise Sources Using Vibration Velocity - Measurement for Seal Machinery
GB 17930 Gasoline for Motor Vehicles
GB 18351 Ethanol Gasoline for Motor Vehicles
GB/T 19147 Automobile Diesel Fuels
QC/T 238 Storage and Preservation for Automotive Parts
QC/T 413-2002 Basic Technical Requirements for Automotive Electric Equipment QC/T 414 Color of Low-voltage Wire for Automobile
3 Terms and Definitions
The following terms and definitions are applicable to this Part.
3.1 Electric Fuel Pump
Electric fuel pump refers to a mechatronic component device, which is constituted of a small and special electrical machine, which is in direct interconnection with a micro fuel pump, and through the encapsulation of the outer shell and auxiliary parts. Electric fuel pump shall be used to pump fuel from the fuel tank to the engine in the gasoline or diesel engine fuel supply system.
3.2 Cold Magnet Knockdown
Cold magnet knockdown refers to performance changes of fuel pump motor and its magnetic materials at a low temperature as a result of impact current.
3.3 Anti-flexure Force on the Inlet and Outlet
Anti-flexure force on the inlet and outlet refers to the anti-deformation performance of the inlet pipe and outlet pipe of fuel pump.
3.4 Free Flow
Free flow refers to the output flow value of fuel pump when imposing nominal voltage on the fuel pump and placing the output flow governing valve in a full-open state. 3.5 Shut-off Pressure
Shut-off pressure refers to the output pressure value of fuel pump when imposing nominal voltage on the fuel pump and placing the output flow governing valve in a full- close state.
4 Classification
4.1 Classification by Installation Mode
In accordance with the mode of installation, fuel pump may be divided into: ---External pump: fuel pump which is installed on fuel supply pipeline outside the fuel tank;
---Internal pump: fuel pump which is installed inside the fuel tank.
5 Requirements
5.1 General Requirements
5.1.1 Normal operating conditions
Environment shall comply with the stipulation in 3.1.2 in QC/T 413-2002. The filter shall be equipped with inlet filter, whose mesh size is less than or equals to 60 ??m. Under the rated flow, filter pressure loss shall be less than 0.01 MPa. Internal pump would 5.1.8 Low-voltage wiring hardness
Low-voltage wiring hardness that the fuel pump uses shall comply with the stipulations in 3.2.3 in QC/T 413-2002.
5.1.9 Anti-flexure force on the inlet and outlet
Anti-flexure force on the inlet and outlet shall comply with the stipulations in product technical documents.
5.2 Performance
5.2.1 Main performance parameters
Rated current, rated pressure, rated flow, free flow and shut-off pressure shall comply with the stipulations in product technical documents.
5.2.2 Check valve performance
5.2.2.1 Check valve leakage
Place a check valve under the pressure of 0.23 MPa; the leakage of the test solution shall be less than 3 mL/h.
5.2.2.2 Check valve service life
After check valve is switched on and off for 100,000 times, the performance of the check valve shall comply with the stipulation in 5.2.2.1.
5.2.3 Pressure relief valve operating range
If rated pressure is pn, the lower limit of the pressure relief valve when it is switched on is pn + 0.1 MPa; the upper limit of the pressure relief valve in full-open state is pn + 0.5 MPa. If rated pressure pn is less than 0.1 MPa, the upper limit of the pressure relief valve in full-open state is pn + 0.2 MPa. The switch-off value of the pressure relief valve shall be more than pn.
5.3 Noise
Noise of the fuel pump shall be less than 70 dB(A).
5.4 Resistance to Abnormal Power Supply Voltage
5.4.1 Resistance to reverse polarity of power supply
The fuel pump shall be able to bear 1 min of power supply reverse polarity test and maintain undamaged. The reverse voltage value is 7/6 times of the nominal voltage. After the test, the product shall comply with the stipulation in 5.2.1. 5.10.2 Resistance to high-temperature
5.10.2.1 Resistance to high-temperature storage
At + 75 ??C, conduct high-temperature test on the fuel pump for 8 h. After the product recovers to normal temperature, its performance shall comply with the stipulation in 5.2.1.
5.10.2.2 Resistance to high-temperature operation
When fuel temperature rises from room temperature to the maximum operating temperature, operate the fuel pump under nominal voltage and rated pressure for 60 min. The flow of the fuel pump shall be over 75% of the rated value. After the product recovers to normal temperature, its performance shall comply with the stipulation in 5.2.1.
5.10.3 Resistance to temperature variation
In accordance with the stipulation in 3.10.3 in QC/T 413-2002, conduct the temperature variation test on the fuel pump. The product shall receive the test in a non-operating state. In the test, the low temperature and high temperature shall be selected between -30 ??C ~ + 65 ??C. The duration of exposure to each temperature shall be 2 h. After the test, the product recovers to normal temperature and shall comply with the stipulation in 5.2.1.
5.11 Resistance to Temperature/Humidity Cyclic Variation (applicable to external fuel pump)
In accordance with the stipulation in 3.11 in QC/T 413-2002, the external pump shall receive the test between -10 ??C ~ + 65 ??C in a non-operating state. After the test is completed and the product recovers to normal temperature, the product shall comply with the stipulation in 5.1.9 and 5.2.1.
5.12 Resistance to Vibration
The fuel pump shall receive the test in a non-operating and normal installation state. The severity level of sweep frequency vibration test shall comply with the stipulation of ?€?other parts?€? in Table 3 in QC/T 413-2002; frequency range shall be (25 ~ 500) Hz. After the vibration test, the product shall not be damaged; the fasteners shall not be loosened and shall comply with the stipulation in 5.2.1.
5.13 Resistance to Salt Spray
The fuel pump shall receive salt spray resistance test. The test duration of the external pump shall be 144 h; the test duration of the internal pump shall be 48 h. After the test, no corrosion which is more than 5% of the metal external surface area shall be generated.
6.12 Temperature/Humidity Cyclic Variation Resistance Test
The external pump shall be filled with fuel. Temperature/humidity cyclic variation resistance test shall be conducted in accordance with the stipulation in 4.11 in QC/T 413-2002.
6.13 Vibration Resistance Test
Fixate the product on vibration test bench; place it in the position of normal installation. Conduct the test under non-operating state. Meanwhile, the flexible pipes, plug connectors or other accessories that are connected with the product shall be properly installed and fixated.
6.14 Salt Spray Resistance Test
Salt spray resistance test shall be conducted in accordance with the stipulation in 4.13 in QC/T 413-2002. Under non-operating state, install the product in accordance with the state of normal application. Before conducting the test, the inlet and outlet must be sealed.
6.15 Fuel Compatibility Resistance Test
Under normal temperature, respectively adopt 3 kinds of fuel, which is corresponding with the engine, to immerse the product (the product shall be filled with fuel). The duration shall respectively be 30 days. Automobile diesel in GB/T 19147; automobile gasoline in GB 17930, automobile ethanol gasoline and M10 (gasoline containing 10% of methanol) in GB 18351 are recommended here. Under the non-operating state, place the product in a sealed vessel and conduct immersion test. After the test, in the fuel stipulated in technical documents, re-test the main performance.
6.16 Surface Protection Test
Surface protection test shall be conducted in accordance with the stipulation in 4.15 in QC/T 413-2002.
6.17 Durability Test
Conduct the test on an exclusive bench (a combination of n test devices shown in Figure 2). Pressure shall be set up in accordance with the product?€?s rated value. In bench test, the duration of each consecutive operation shall be not less than 4 h; the accumulative time shall reach the requirement stipulated in 5.16. Test equipment shall receive fuel change, maintenance and adjustment once a week.
7 Inspection Rules
7.1 Qualification Documents and Markings
After passing the inspection, each product shall be allowed to exit factory; it shall be attached with product quality certificate or marking.
7.2 Classification of Product Inspection
Product inspection shall be divided into exit-factory inspection, acceptance inspection and type inspection.
7.3 Exit-factory Inspection
Each fuel pump shall pass the inspection and be packed into boxes, then, it shall be allowed to be put in storage. Inspection items include 5.1.9 and 5.2.1. 7.4 Acceptance Inspection
Acceptance inspection shall be conducted in accordance with 5.4 in QC/T 413-2002. 7.5 Type Inspection
7.5.1 Several circumstances where type inspection shall be conducted
Under one of the following circumstances, the manufacturer shall conduct the type inspection:
a) In trial production type appraisal of new products or old products in off-site production;
b) After the official production, when there are relatively significant changes in structures, materials or techniques that might affect product performance; c) Products in batch production or mass production shall receive type inspection at least once in every two years;
d) When production is suspended for over one year and resumed;
e) When there are large differences between the exit-factory inspection result and the previous type inspection result;
f) When a national supervision institution proposes the requirement for type inspection.
7.5.2 Sampling and grouping
7.5.2.1 Sample size
Products for type inspection shall be extracted from the same batch of products that are qualified in the exit-factory inspection. The quantity of samples shall be not less than 15.
fails in one item, double quantity of products may be re-extracted; re-inspection may be conducted in the unqualified items. If it still fails, then, this batch of products shall be deemed as unqualified. However, when it fails in the durability test, re-extraction will be unnecessary; the product shall be directly determined as unqualified. 8 Marking, Packaging, Storage and Safekeeping
8.1 Marking
8.1.1 Product marking
Each product shall have markings on obvious parts and have attached operation instruction and quality certificate. The basic content shall include:
a) Product trademark;
b) Product model, nominal voltage (if it is 12 V, it may be omitted), voltage polarity or colored wires allocated in accordance with QC/T 414;
c) Production date (or production number) or batch number;
d) Main technical parameters of production, and applicable automobile models; e) Manufacturer?€?s name and address;
f) Number of product standard being implemented; warning signs or Chinese warning instructions being used.
On this product, it is allowed to merely mark trademark and model. However, on its package or operation instruction, all the content mentioned above shall be indicated, along with the quality inspector?€?s seal.
8.1.2 Packaging marking
The basic content of packaging marking shall include:
a) Shipment-related marking content: product?€?s name and trademark, product model, specification and applicable automobile models;
b) Manufacturer?€?s name, specific address, zip code and phone number (or website as a replacement);
c) Production date (or production number) or batch number;
d) Number of product standard being implemented;
e) Packaging-pictorial marking for handling of goods: keep dry; pile up; place lightly. It shall also comply with relevant stipulations in GB/T 191;

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