JB/T 11880.1-2014 English PDF (JB/T11880.1-2014)

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JB/T 11880.1-2014: Diesel engines. Selective catalytic reduction (SCR) systems. Part1: General requirements
JB/T 11880.1-2014
JB
MECHANICAL INDUSTRY STANDARD
OF THE PEOPLE’S 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
ηi
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...