JB/T 11880.5-2014 English PDF (JBT11880.5-2014)

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JB/T 11880.5-2014: Diesel engines. Selective catalytic reduction (SCR) systems. Part 5: Urea solution injectors
JB/T 11880.5-2014
JB
MECHANICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 27.020
J 93
Filing number: 47529-2014
Diesel engines - Selective catalytic reduction (SCR)
systems - Part 5: Urea solution injectors
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 Type and model ... 6 
4.1 Type ... 6 
4.2 Model ... 7 
5 Technical requirements ... 7 
5.1 Technical requirements for airless urea solution injectors ... 7 
5.2 Technical requirements for air-assisted urea solution injectors ... 13 
6 Test method ... 15 
6.1 Test method for injector for airless urea solution ... 15 
6.2 Test method for air-assisted urea solution injector ... 20 
7 Inspection rules ... 24 
7.1 Qualified documents and marking ... 24 
7.2 Product inspection category ... 24 
7.3 Exit-factory inspection ... 24 
7.4 Type inspection ... 24 
7.5 Sampling inspection ... 26 
8 Marking, packaging, transportation, storage ... 26 
8.1 General ... 26 
8.2 Marking ... 26 
8.3 Packaging ... 27 
8.4 Transportation ... 27 
8.5 Storage ... 27 
Diesel engines - Selective catalytic reduction (SCR)
systems - Part 5: Urea solution injectors
1 Scope
This part of JB/T 11880 specifies the terms and definitions, type and model,
technical requirements, test methods, inspection rules, marking, packaging,
transportation, storage of urea solution injectors in the selective catalytic
reduction (SCR) system for diesel engines...
This part applies to jet injectors for urea solution.
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 2423.8 Environmental testing for electric and electronic products Part
2: Test methods Test Ed: Free fall
GB/T 2423.10 Environmental testing for electric and electronic products -
Part 2: Tests methods - Test Fc: Vibration (sinusoidal)
GB/T 2423.30 Environmental testing - Part 2: Test methods - Test XA and
guidance: Immersion in cleaning solvents
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/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests
GB/T 13277.1-2008 Compressed air - Part 1: Contaminants and purity
classes
GB/T 13384 General specifications for packing of mechanical and electrical
product
GB/T 16538-2008 Acoustics - Determination of sound power levels of noise
sources using sound pressure - Comparison method in situ
GB/T 17619 Limits and methods of testing for immunity of electrical /
electronic sub-assemblies in vehicles to electromagnetic radiation
GB 18655 Limits and methods of measurement of radio disturbance
characteristics for the protection of receivers used on board vehicles
GB/T 25363 Electromechanical solenoid fuel injector assemblies of gasoline
engines - Testing methods
SH 0004 Solvent oil for use in rubber industry
QC/T 413-2002 Basic technical requirements for automotive electric
equipment
ISO 22241-1 Diesel engines - NOx reduction agent AUS 32 - Part 1: Quality
requirements first edition
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 injector
A device for injecting urea solution into the exhaust pipe of an engine, which
includes two types: an air-assisted urea solution injector and an airless urea
solution injector.
3.2
Airless urea solution injector
A device in which a certain amount of urea solution is directly injected into
the exhaust pipe of the engine by a control valve.
3.3
Airless urea solution injector assembly
5.1.2.2 Torsion strength
5.1.2.2.1 Apply a torsion torque of 6.0 N • m to both ends of the injector
assembly; the injector shall not be deformed after 5 s.
5.1.2.2.2 After the test, the tightness of the injector shall meet the requirements
specified in 5.1.8; the flow consistency shall meet the requirements specified in
5.1.13.
5.1.2.3 Bending strength
5.1.2.3.1 Simultaneously apply a bending moment of 4.0 N • m to both ends of
the longitudinal axis of the injector assembly; it shall not deform after 30 s.
5.1.2.3.2 After the test, the tightness of the injector shall meet the requirements
specified in 5.1.8; the flow consistency shall meet the requirements specified in
5.1.13.
5.1.3 Vibration resistance
5.1.3.1 During the vibration test, there shall be no damage to the parts of the
injector and no loosening or falling off of the fasteners.
5.1.3.2 After the test, the tightness of the injector shall meet the requirements
specified in 5.1.8; the flow consistency shall meet the requirements specified in
5.1.13.
5.1.4 Pressure resistance
5.1.4.1 During the pressure resistance test, there shall be no deformation or
rupture of the injector.
5.1.4.2 After the test, the tightness of the jet injector shall meet the requirements
specified in 5.1.8; the consistency of the flow view shall meet the requirements
specified in 5.1.13.
5.1.5 Salt spray resistance
5.1.5.1 After the salt spray test, the outer surface of the injector shall be clean
and there shall be no signs of corrosion.
5.1.5.2 After the test, the tightness of the injector shall meet the requirements
specified in 5.1.8.
5.1.6 Resistance to industrial solvents
5.1.6.1 After the end of the industrial solvent resistance test, there shall be no
corrosion marks, cracks, discoloration and other abnormal phenomena on the
outer surface of the injector.
5.2 Technical requirements for air-assisted urea solution
injectors
5.2.1 General requirements
5.2.1.1 The appearance of the injector shall not have defects such as rust spots,
knocks, etc. The size of the injector shall be manufactured in accordance with
the product drawings and technical documents approved by the prescribed
procedures.
5.2.1.2 The parts of the injector shall be complete, and the trademark shall be
clear.
5.2.1.3 When using the urea solution for vehicles as specified in ISO 22241-1,
the injector shall work normally.
5.2.1.4 The fluid piping joints of the injector meet the requirements of SAE
J2044.
5.2.2 Strength performance
5.2.2.1 Apply an axial pressure of 600 N to the longitudinal axis of the injector,
the injector shall not be deformed after 60 s.
5.2.2.2 Apply a torsion torque of 6.0 N • m at both ends of the injector, the
injector shall not be deformed after 5 s.
5.2.2.3 Simultaneously apply a bending moment of 4.0 N • m at both ends of
the longitudinal axis of the injector, the injector shall not be deformed after 30
s.
5.2.3 Vibration resistance
After the vibration test, there shall be no damage to parts and fasteners; there
is no loosening or falling off of fasteners.
5.2.4 Pressure resistance
The in...