JB/T 11880.4-2014 PDF English
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JB/T 11880.4-2014: Diesel engines. Selective catalytic reduction (SCR) systems. Part4: Urea solution supply pump
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/JBT11880.4-2014
JB
MECHANICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 27.020
J 93
Filing number: 47528-2014
Diesel engines - Selective catalytic reduction (SCR)
systems - Part 4: Urea solution supply pump
ISSUED ON: JULY 09, 2014
IMPLEMENTED ON: NOVEMBER 01, 2014
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 4
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Type and model ... 7
4.1 Type ... 7
4.2 Model ... 8
5 Requirements ... 8
5.1 General requirements... 8
5.2 Appearance and size ... 9
5.3 Fault diagnosis function of urea pump (if there is a controller) ... 9
5.4 Measurement accuracy (if any) ... 9
5.5 Tightness ... 9
5.6 Durability ... 9
5.7 High-and-low temperature resistance (if there is heating function) ... 10
5.8 Heating function (if any) ... 10
5.9 Protection performance ... 11
5.10 Cleanliness ... 11
5.11 Vibration resistance ... 11
5.12 Salt spray resistance ... 11
5.13 Abnormal power supply voltage resistance ... 11
5.14 EMC performance ... 12
5.15 Withstanding voltage performance of insulation ... 12
6 Test method ... 13
6.1 Test conditions ... 13
6.2 Inspection of appearance and installation size ... 13
6.3 Test of fault diagnosis function ... 13
6.4 Test of measurement accuracy ... 13
6.5 Tightness test ... 14
6.6 Endurance reliability test ... 14
6.7 Test of high-and-low-temperature resistance ... 14
6.8 Heating function test ... 15
6.9 Protection performance test ... 15
6.10 Cleanliness test ... 16
6.11 Vibration resistance test ... 16
6.12 Salt spray resistance test ... 17
6.13 Abnormal power supply voltage resistance test ... 17
6.14 Electromagnetic compatibility test ... 17
6.15 Insulation withstanding voltage test ... 18
7 Inspection rules ... 18
7.1 Inspection category ... 18
7.2 Exit-factory inspection ... 18
7.3 Sampling inspection ... 19
7.4 Type inspection ... 19
8 Marking, packaging, transportation, storage ... 20
8.1 Marking ... 20
8.2 Packaging ... 20
8.3 Transportation and storage ... 21
Diesel engines - Selective catalytic reduction (SCR)
systems - Part 4: Urea solution supply pump
1 Scope
This part of JB/T 11880 specifies the terms and definitions, type and model,
requirements, test methods, inspection rules, markings, packaging,
transportation and storage of urea solution supply pumps (hereinafter referred
to as urea pumps).
This part applies to diesel engines and other vehicles equipped with SCR
systems. The engines for other purposes can also be implemented by reference.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 2423.1 Environmental testing - Part 2: Test methods - Tests A: Cold
GB/T 2423.2 Environmental testing - Part 2: Test methods - Tests B: Dry heat
GB/T 2423.17 Environmental testing for electric and electronic products -
Part 2: Test method - Test Ka: Salt mist
GB/T 2423.22 Environmental testing - Part 2: Tests methods - Test N:
Change of temperature
GB/T 2423.34 Environmental testing - Part 2: Test methods - Test Z/AD:
Composite temperature/humidity cyclic test
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1:
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection
GB 4208 Degrees of protection provided by enclosure (IP code)
GB/T 13306 Plate
GB/T 17619-1998 Limits and methods of testing for immunity of electrical /
electronic sub-assemblies in vehicles to electromagnetic radiation
GB 18655 Vehicles boats and internal combustion engines - Radio
disturbance characteristics - Limits and methods of measurement for the
protection of on-board receivers
GB/T 19951-2005 Road vehicles - Test methods for electrical disturbances
from electrostatic discharge
QC/T 29106 Technical specification of automobile wire harness
ISO 16232-3 Road vehicles - Cleanliness of components of fluid circuits -
Part 3: Method of extraction of contaminants by pressure rinsing first edition
ISO 16232-10 Road vehicles - Cleanliness of components of fluid circuits -
Part 10: Expression of results first edition
ISO 22241-1 Diesel engines - NOx reduction agent AUS 32 - Part 1: Quality
requirements first edition
SAE J1939 (all parts) Recommended practice for a serial control and
communication vehicle network
SAE J2044 Quick connect coupling specification for liquid fuel and
vapor/emissions systems
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Urea solution supply pump
It is a device for delivering urea solution to the urea ejector, including air-
assisted urea pump and airless-assisted urea pump.
3.2
Air-assisted urea solution supply pump
This is a device that will have a precisely metered urea solution delivered to
the urea injector under the assistance of air, which has supply and metering
functions.
3.3
Airless-assisted urea solution supply pump
5.7 High-and-low temperature resistance (if there is heating
function)
5.7.1 Low temperature resistance
The urea pump is placed in a high-and-low temperature test chamber. At a
temperature of -40 °C ± 2 °C, perform the low temperature test of 48 h (24 h
low temperature storage, 24 h low temperature operation). After the test is over
and return to normal temperature, the performance meets the requirements of
5.3.
5.7.2 High temperature resistance
The urea pump is placed in a high-and-low temperature test chamber. At a
temperature of 70 °C ± 2 °C, perform the high temperature limit test of 144 h
(48 h low temperature storage, 96 h low temperature operation). After the test
is over and return to normal temperature, the performance meets the
requirements of 5.3.
5.7.3 Resistance to temperature changes
The temperature change test of the urea pump is carried out in accordance with
the provisions of the test Na in GB/T 2423.22. During the test, the low
temperature is -40 °C and the high temperature is 85 °C. The exposure time in
each temperature is 1 h; the temperature conversion time is 20 s ~ 30 s; the
number of cycles is 5. After the test is over and return to normal temperature,
the performance meets the requirements of 5.3.
5.7.4 Resistance to combined cyclic temperature/humidity change
The urea pump shall be subjected to 10 cycles of combined cyclic
temperature/humidity test between -10 °C and 65 °C in accordance with the
provisions of GB/T 2423.34, each cycle time is 24 h. It does not work at low
temperature segment. Turn on the urea pump at high temperature segment.
After the test is over and return to normal temperature, the performance meets
the requirements of 5.3.
5.8 Heating function (if any)
The urea pump is placed in the high-temperature test chamber, energized to
work, cut off power after normal operation. Start the urea pump after storing for
8 hours under the temperature condition of -40 °C ± 2 °C. The urea pump can
reach normal working condition after 45 minutes. After the test, the performance
meets the requirements of 5.3.
Reversal of voltage value: 14 V ± 0.2 V for 12 V electrical system; 28 V ± 0.2 V
for 24 V electrical system. After the test, the performance meets the
requirements of 5.3.
5.13.2 Withstanding power supply overvoltage
The urea pump shall be subjected to an overvoltage test in accordance with the
provisions of 6.13.2, to confirm its ability to not be damaged under the power
supply overvoltage condition.
12 V system: It is capable of withstanding 18 V voltage for 60 min. After the test
is over, the performance meets the requirements of 5.3.
24 V system: It is capable of withstanding 36 V voltage for 60 min. After the test,
the performance meets the requirements of 5.3.
5.14 EMC performance
5.14.1 Radiation immunity
The urea pump is subjected to the radiation immunity test in accordance with
6.14.1; the product has no damage after the test. Performance meets the
requirements of 5.3.
5.14.2 Electrostatic discharge interference test
The urea pump is subjected to electrostatic discharge interference test in
accordance with 6.14.2; the product is not damaged after the test. Performance
meets the requirements of 5.3.
5.14.3 Electromagnetic disturbance
The urea pump is subjected to the electromagnetic disturbance test according
to the provisions of 6.14.3; the test result reaches the level 3 as specified in
GB/T 18655.
5.15 Withstanding voltage performance of insulation
Between the non-connected conductive parts of the urea pump and between
the conductive parts and the housing, it shall be able to withstand 50 Hz, 550
V (effective value) sine wave voltage test for 1 min, during which the insulation
is not breakdown. In mass continuous production, a test with a voltage of 660
V and a duration of 1 s can be used instead. After the test, the performance
meets the requirements of 5.3.
It is performed according to the corresponding test method of the test Ad (low
temperature test with gradual temperature gradient of heat dissipation test
sample - the test sample is energized after the temperature starts to stabilize)
in GB/T 2423.1.
6.7.2 Test of high temperature resistance
It is performed according to the corresponding test method of the test Bd (high
temperature test with gradual temperature gradient of heat dissipation test
sample - the test sample is not energized during the regulating period of
temperature rise) in GB/T 2423.2.
6.7.3 Test of temperature change resistance
It is performed according to the corresponding test method of test Na (fast
temperature change test with specified conversion time) in GB/T 2423.22.
6.7.4 Combined cyclic temperature/humidity test
It is performed according to the relevant requirements of the test Z/AD
(combined cyclic temperature/humidity test method) in GB/T 2423.34.
6.8 Heating function test
The urea pump is placed in the high-and-low-temperature test box. It is powered
off after normal operation. After storing for 8 hours at a temperature of 40°C ±
2°C, start the urea pump to enter the heating state. Monitor the pressure and
temperature changes through the pressure sensor and temperature sensor.
The urea pump can enter the normal working state after continuous heating for
45 minutes.
6.9 Protection performance test
6.9.1 Anti-solid foreign matter performance test shall be carried out in
accordance with the corresponding test method of IP6X in GB 4208.
6.9.2 The waterproof performance test shall be carried out according to the
corresponding test method of IPX6 in GB 4208.
Use the nozzle test to spray water on the tested shell in all possible directions.
The test conditions are as follows:
a) Nozzle’s inner diameter: 12.5 mm;
b) Water flow rate: (100 ± 5) L/min;
It is performed according to the provisions of GB/T 19951.
6.14.3 Electromagnetic disturbance test
It is performed according to the relevant provisions of GB 18655.
6.15 Insulation withstanding voltage test
6.15.1 The test is only carried out on the products whose parts are in normal
condition after the new assembly. During the test, apply a sinusoidal voltage of
550 V (effective value) and a frequency of 50 Hz ~ 60 Hz for 60 s. In mass
continuous production, a test with a voltage of 660 V and a duration of 1 s can
be used instead. The requirements are as follows:
- Between terminals with electrical insulation;
- Between the terminal with electrical insulation and the housing with
electrical conduction surface;
- (In the case of a plastic housing) between the terminal and the electrode
wrapped in the housing (such as metal foil).
6.15.2 When semiconductor devices (diodes, transistors, integrated circuit
blocks, etc.) are installed in the product, then, these devices shall be
disconnected, or the withstanding voltage test shall be carried out before
assembling the devices.
6.15.3 The products that have been installed and used and have undergone
endurance tests are not subject to insulation withstanding voltage test.
7 Inspection rules
7.1 Inspection category
Urea pump inspection is divided into exit-factory inspection, sampling
inspection, type inspection.
7.2 Exit-factory inspection
Each urea pump shall be inspected and qualified, and the product inspection
certificate shall be attached before leaving the factory. The inspection items,
technical requirements and test methods of the exit-factory inspection shall be
in accordance with Table 5.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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