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JB/T 11880.1-2014 English PDF (JBT11880.1-2014)

JB/T 11880.1-2014 English PDF (JBT11880.1-2014)

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JB/T 11880.1-2014: Diesel engines. Selective catalytic reduction (SCR) systems. Part1: General requirements

This part of JB/T 11880 specifies the technical conditions, test methods and approval rules of the selective catalytic reduction (SCR) system. This part applies to SCR systems for diesel engines and vehicles. SCR systems for other purposes can also be implemented by reference.
JB/T 11880.1-2014
JB
MECHANICAL INDUSTRY STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
ICS 27.020
J 93
Filing number: 47525-2014
Diesel engines - Selective catalytic reduction (SCR)
systems - Part 1: General requirements
ISSUED ON: JULY 09, 2014
IMPLEMENTED ON: NOVEMBER 01, 2014
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Approval application ... 8
5 Approval ... 9
6 Requirements ... 11
6.1 General requirements... 11
6.2 Emission-related requirements ... 13
6.3 Requirements on noise and vehicle performance ... 15
6.4 Durability requirements of the bench ... 15
6.5 Requirements on compatibility of on-board diagnostics (OBD) systems [Only for approval catalytic reduction systems for vehicles equipped with on-board diagnostics (OBD) systems] ... 17
7 Type change and approval extension of approval catalytic reduction system ... 17
8 Production consistency ... 18
9 Penalties for inconsistent production ... 18
10 Production suspension ... 19
11 Necessary information ... 19
Appendix A (Informative) Additional information for type approval certificate . 20 Appendix B (Informative) Type approval application materials for approval catalytic reduction systems ... 23
Appendix C (Informative) Type certificate format of approval catalytic reduction system ... 24
Appendix D (Informative) Example of approval mark layout ... 26
References ... 27
Diesel engines - Selective catalytic reduction (SCR)
systems - Part 1: General requirements
1 Scope
This part of JB/T 11880 specifies the technical conditions, test methods and approval rules of the selective catalytic reduction (SCR) system.
This part applies to SCR systems for diesel engines and vehicles. SCR systems 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 1495 Limits and measurement methods for noise emitted by accelerating motor vehicles
GB/T 6072.3 Reciprocating internal combustion engines - Performance -
Part 3: Test measurements
GB 14097 Reciprocating internal combustion engines - Limit values of
emitted noise
GB 17691-2005 Limits and measurement methods for exhaust pollutants
from compression ignition and gas fueled positive ignition engines of
vehicles (III IV V)
GB 18352.3-2005 Limits and measurement methods for emissions from
light-duty vehicles
HJ 437-2008 Technical specification for on-board diagnostic (OBD) system of compression ignition and gas fueled positive ignition engines of vehicles HJ 438 Durability of emission control systems of compression ignition and gas fueled positive ignition engines of vehicles
A type of catalytic reduction device that does not differ in the following main aspects:
a) The number, structure and material of the coated carrier;
b) Type of catalytic activity (selective catalytic reduction, oxidation, three- way ...);
c) The carrier volume, the ratio of front-end area to length;
d) The catalyst coating content;
e) Hole density;
f) Size and shape;
g) Thermal protection.
3.8
Vehicle type
Vehicles of the same category that have the same equivalent inertia
corresponding to the reference mass as well as the main characteristics of the engine and vehicles.
3.9
Approval of a catalytic reduction system
The approval of the catalytic reduction system for one or more models or vehicles, to limit pollutant emissions, noise levels and impact on vehicle performance and applicable on-board diagnostic (OBD) systems.
3.10
Deteriorated catalytic reduction system
After actual vehicle aging or rapid aging treatment, the catalytic reduction system whose engine or vehicle emission level does not exceed the
specified requirements.
3.11
Conversion efficiency
??i
When the test engine or vehicle runs at specified working conditions, the rate f) For sample sheets of relevant technical data, see Appendix B.
4.3 The approval applicant shall provide the following to the testing organization responsible for approval testing:
a) Heavy-duty vehicle engines or light-duty vehicles equipped with new
original catalytic reduction systems and approved according to emission regulations. The selected vehicle or engine shall be agreed upon by the applicant and the testing agency in accordance with the requirements of emission regulations. The engine or vehicle to be tested shall be in good mechanical condition. Before the test, the heavy-duty vehicle engine has been fit-in running for at least 40 hours; the light-duty vehicle has been in fit-in running for at least 3000 km. The engine or vehicle shall be free from the defects of the emission control system. The original parts that are excessively worn or the emission control failure shall be repaired or
replaced. Before the emission test, the engine or vehicle shall be correctly adjusted to the technical specifications specified by the manufacturer. b) A sample of approval catalytic reduction system. The sample shall be clearly and persistently marked with the approval applicant?€?s factory name, trademark and trade name.
c) In addition, a certified catalytic reduction system sample shall be added for use in vehicles equipped with an on-board diagnostic (OBD) system.
The sample shall be clearly and persistently marked with the applicant?€?s factory name, trademark and trade name. The sample must be degraded
in accordance with 3.10.
5 Approval
5.1 If the catalytic reduction system submitted for approval in accordance with the provisions of this part meets the requirements of Chapter 6, the approval of the type of catalytic reduction system is permitted.
5.2 If the original catalytic reduction system used for approval is of the type covered by Appendix A and is used for the engine or vehicle involved in the relevant type approval documents, it shall only meet the following requirements and no longer need to be certified according to the provisions of this part: a) The original catalytic reduction system used for approval shall have at least the following signs:
1) The name or trademark of the engine or vehicle manufacturer;
2) For the brand and part identification number of the original approval catalytic reduction system, see the information listed in 5.3.
5.5 If the requesting party for type approval can prove to the type approval management department or testing organization that the catalytic reduction system is of the type listed in Appendix A, then the type approval certificate may be approved, without requiring verification in accordance with the requirements as specified in Chapter 6.
5.6 Refer to the sample form stipulated in Appendix C, to send a notice on the type approval, approval extension or approval rejection of a certain type of catalytic reduction system according to the provisions of this part to the contracting parties adopting the provisions of this part .
5.7 If the approval catalytic reduction system conforms to a certain type of catalytic reduction system certified in accordance with the provisions of this part, the approval mark consisting of the following patterns shall be marked in the specified position of the approval form:
a) In a circle, write the letter E and the identification number of the country where the approval is made, which is consistent with the international
identification number1) (if required);
b) Note the standard number of this part and a dash and approval number on the side of the abovementioned circle.
5.8 If the approval catalytic reduction system conforms to the type of catalytic reduction system as approved according to the other standards as attached to the agreement at the country where the approval of this part is performed, there is no need to repeat the symbols described in 5.7. At this time, the standard number and approval number, as well as the additional symbols of all standards used in the approval of the country where this part of the approval is located, shall be marked on the right side of the symbol in 5.7 along the line.
5.9 If the approval catalytic reduction system is installed under the vehicle, the approval mark shall be durable and easy to identify.
5.10 See Appendix D for an example of the arrangement of approval marks. 6 Requirements
6.1 General requirements
6.1.1 The product mark of the catalytic reduction system shall be represented by the following numbers and letters:
1 See the provisions of 4.6.1 in the United Nations Economic Commission for Europe (UN/ECE) No.103 Regulation.
6.1.4 The approval catalytic reduction system shall be installed in the same position of the original catalytic reduction system; it shall not change the position of the nitrogen oxide sensor and other applicable sensors on the exhaust pipe. 6.1.5 If the original catalytic reduction system adopts thermal protection measures, the approval catalytic reduction system shall also have equivalent protection facilities.
6.1.6 The approval catalytic reduction system shall be durable; its design, manufacture and installation shall be such that the vehicle can be protected from corrosion and oxidation under the conditions of use.
6.1.7 Before the test, the approval catalytic reduction system shall be pre- conditioned for 5 h under the condition that the inlet temperature of the sample is 500 ??C ?? 25 ??C, the space velocity is (40000 ?? 400) h-1, or in accordance with the provisions of Table BA.1 in GB 17691-2005 at the engine speed A and 100% load.
6.2 Emission-related requirements
6.2.1 General
Install on engine or vehicle that meets the requirements of 4.3 a) with a catalytic reduction system that requires approval. Compare the performance with the original catalytic reduction system according to the following procedures. 6.2.2 Determination of comparison basis
After the engine or vehicle is equipped with a new original catalytic reduction system [see 4.3 a)] for trial operation, the heavy-duty vehicle engine shall follow the cold start test conditions of ESC, ETC and related WHTC 2) as specified in GB 17691, the light-duty vehicle shall follow the type I test conditions as specified in GB 18352.3 to perform the emission test.
6.2.3 Emission test with approval catalytic reduction system
After the original catalytic reduction system installed on the test engine or vehicle is replaced with an approval catalytic reduction system [see 4.3 b)] for trial operation, the heavy-duty vehicle engine shall follow the cold start test conditions of ESC, ETC and related WHTC as specified in GB 17691, the light- duty vehicle shall follow the type I test conditions as specified in GB 18352.3 to perform the emission test.
6.2.4 Assessment of exhaust pollutant emissions from vehicles or engines 2 The world harmonized transient cycle.
6.3 Requirements on noise and vehicle performance
The approval catalytic reduction system shall meet the requirements of related noise standards such as GB 14097 or GB 1495. The maximum power of the
engine can be measured on the test bench according to the provisions of GB/T 6072.3, or the performance of the vehicle can be verified by measuring the maximum absorbed power of the engine at the maximum power speed on the
chassis dynamometer. When the approval catalytic reduction system is
installed, under the reference atmospheric conditions of atmospheric
temperature T0 = 298 K (25 ??C) and dry air pressure ps0 = 99 kPa, the actual measured power shall not be 5% lower than when the original catalytic
reduction system installed.
6.4 Durability requirements of the bench
6.4.1 Before the durability test of the bench, under the conditions that the space velocity is (40000 ?? 400) h-1 and the molar ratio of ammonia nitrogen (NH3/NOx) is 1, the catalytic reduction system is subject to the performance test and it reaches:
a) When the inlet temperature is 250 ??C, its conversion efficiency shall not be less than 50% (recommended value is 60%);
b) When the inlet temperature is 450 ??C, the conversion efficiency shall not be lower than 80%.
6.4.2 For the approval catalytic reduction system for heavy-duty vehicles, perform a 200-hour rapid aging test on the engine test bench according to Table 3. Then determine the performance of the catalytic reduction system according to the provisions of 6.4.1; its NOx conversion efficiency shall not be lower than the specified values of 6.4.1 a) and 6.4.1 b) by 10% (that is, not less than 45% and 72% respectively). Then carry out ESC and ETC tests according to GB 17691; carry out WHTC cold start test according to relevant regulations. The test is repeated 3 times; take the average value. The emission level shall meet the emission limits as specified in Table 4 and Table 6.
6.4.3 For the approval catalytic reduction system for light-duty vehicles, first perform a 200-hour rapid aging test on the engine test bench according to Table 3. Then determine the performance of the catalytic reduction system according to the provisions of 6.4.1; its conversion efficiency to NOx shall not be 10% lower than the values specified in 6.4.1 a) and 6.4.1 b) (that is, not less than 45% and 72% respectively). Then install it on the test vehicle; carry out the type I test according to GB 18352.3. The test is repeated 3 times and take the average value. The emission level shall meet the emission limit requirements 6.5 Requirements on compatibility of on-board diagnostics
(OBD) systems [Only for approval catalytic reduction systems
for vehicles equipped with on-board diagnostics (OBD)
systems]
6.5.1 For the compatibility of the approval catalytic reduction system and the on-board diagnostic (OBD) system, heavy-duty vehicles shall be tested in accordance with the provisions of Appendix B in HJ 437-2008; light-duty vehicles shall be tested in accordance with the provisions of Annex IA in GB 18352.3-2005.
6.5.2 The provisions in Annex IA of GB 18352.3-2005 and Appendix B of HJ 437-2008 on the parts other than catalytic converters are not covered by the testing.
6.5.3 After-sales parts manufacturers can use the pretreatment and test procedures used in prototype approval. At this time, the approval authority shall provide the information related to the type approval specified in Appendix B without discrimination as required, including the number and type of
pretreatment cycles, as well as the type of test cycles used by the original equipment manufacturer for the test of on-board diagnostic (OBD) of the catalytic reduction system.
6.5.4 In order to verify whether all other components monitored by the on-board diagnostic (OBD) system are installed correctly and function normally, the on- board diagnostic (OBD) system shall neither display failure codes nor store failure codes before installing any approval catalytic reduction system. For this reason, at the end of the test, it may follow the provisions of 6.2.2 to evaluate the status of the on-board diagnostic (OBD) system.
6.5.5 When the vehicle is running in accordance with the requirements specified in 6.2.3, the fault indicator shall not display a fault.
7 Type change and approval extension of approval
catalytic reduction system
Each type change of the approval catalytic reduction system shall be notified to the administrative department that originally approved the catalytic reduction system.
10 Production suspension
If the approval sponsor completely suspends the production of a certain type of catalytic reduction system certified according to this part, it shall notify the approval authority. After receiving the relevant notice, the approval authority may refer to the form in Appendix C to notify other parties that adopt the provisions of this part.
11 Necessary information
11.1 Each newly approved catalytic reduction system shall be accompanied by the following information:
a) The name or trademark of the catalyst manufacturer;
b) The vehicle equipped with the approval catalytic reduction system (year of manufacture), including the mark used to identify whether the approval catalytic reduction system is suitable for vehicles equipped with on-board diagnostics (OBD) system (if applicable):
c) Installed instrument (if necessary).
11.2 Information shall be provided in any of the following ways:
a) Attach a booklet to the system that has been approved;
b) Print on the outer packaging of the approved catalytic reduction system on sale;
c) Any other applicable methods.
In short, the products distributed at the point of sale of the manufacturing plant must provide the above information.
Appendix B
(Informative)
Type approval application materials for approval catalytic reduction
systems
The submitted drawings shall explain the listed contents in detail in appropriate proportions; the format size is A4 or folded to this specification. If there are photos, they shall fully show the details.
If electronic control devices are used in the system, components or independent technical assembly, it shall provide relevant performance data.
B.1 Overview
B.1.1 Brand.
B.1.2 Type.
B.1.3 The name and address of the manufacturer.
B.1.4 If it is a component or an independent technical assembly, the location and method of adding the approval mark shall be explained.
B.1.5 The address of the assembly plant.
B.2 Device description
B.2.1 The brand and type of the approval catalytic reduction system.
B.2.2 The drawing of the approval catalytic reduction system, in particular, the features referred to in B.2.3.1 and B.2.3.2.
B.2.3 Description of the vehicle model to be installed with the approval catalytic reduction system.
B.2.3.1 Numbers and/or symbols representing engine and vehicle types.
B.2.3.2 Whether the approval catalytic reduction system is required to be compatible with the on-board diagnostic system: yes/no (cross out those that are not applicable).
B.2.4 Description and drawing showing the position of the approval catalytic reduction system relative to the engine exhaust manifold.

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