QC/T 1147-2021 PDF English
Search result: QC/T 1147-2021
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Electronic silicon oil fan clutch for vehicle engine
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QC/T 1147-2021: PDF in English (QCT 1147-2021) QC/T 1147-2021
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.060.40
CCS T 14
Electronic silicon oil fan clutch for vehicle engine
ISSUED ON: MARCH 05, 2021
IMPLEMENTED ON: JULY 01, 2021
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 5
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 7
4 Technical requirements ... 11
5 Test method ... 15
6 Inspection rules ... 25
7 Marking, packaging, transportation, storage ... 26
Appendix A (Normative) Fan clutch test record sheet, open-loop response
feature test curve, data sheet of fan clutch ... 28
Appendix B (Normative) Fan clutch test record sheet, open-loop pulse width
modulation feature test curve, data sheet of fan clutch ... 29
Appendix C (Normative) Fan clutch test record sheet, open-loop modulation
stability test curve, data sheet of fan clutch ... 31
Appendix D (Normative) Fan clutch test record sheet, fan clutch open-loop
speed performance test curve, data sheet ... 32
Appendix E (Normative) Fan clutch test record sheet, fan clutch closed-loop
modulation feature test curve, data sheet ... 33
Appendix F (Normative) Fan clutch test record sheet, fan clutch closed-loop
speed performance test curve, data sheet ... 34
Electronic silicon oil fan clutch for vehicle engine
1 Scope
This document specifies the terms and definitions, technical requirements, test
methods, inspection rules, identification, packaging, transportation, storage of
electronic silicon oil fan clutch for vehicle engine (hereinafter referred to as fan
clutches).
This document is applicable to vehicle engines. The engineering machinery,
tractors, small ships, other fixed and mobile internal combustion engines may
make reference to this standard.
2 Normative references
The provisions in following documents become the provisions of this Standard
through reference in this Standard. 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) is applicable
to this standard.
GB/T 10125-2012 Corrosion tests in artificial atmospheres - Salt spray tests
GB/T 17619-1998 Limits and methods of testing for immunity of electrical /
electronic sub-assemblies in vehicles to electromagnetic radiation
GB/T 2828.1-2012 Sampling procedures for inspection by attributes - Part 1:
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection
GB/T 28046.1-2011 Road vehicles - Environmental conditions and testing
for electrical and electronic equipment - Part 1: General
GB/T 28046.2-2019 Road vehicles - Environmental conditions and testing
for electrical and electronic equipment - Part 2: Electrical loads
QC/T 33-2006 Test methods of viscous fan clutch for automotive engines
QC/T 413-2002 Basic technical requirements for automotive electric
equipment
QC/T 572-1999 Directives for motor vehicle cleanliness - Measuring method
QC/T 747-2006 Specifications of viscous fan clutch for automotive engines
output speed to gradually approaches to the target output speed, by making
the fan clutch be in the disengaged status, through automatic adjustment of
pulse width modulation signal, based on the feedback from the output speed.
3.25
Closed-loop speed feature
When the target speed of the fan clutch is constant, AND the different input
speeds are set, the performance of the control system, to control the output
speed to gradually approaches to the target output speed, by making the fan
clutch be in the disengaged status, through automatic adjustment of pulse
width modulation signal, based on the feedback from the output speed.
4 Technical requirements
4.1 General requirements
4.1.1 Processing and casting
The fan clutch shall be manufactured, in accordance with the approved product
drawings and technical documents. The surface of the fan clutch casting is
smooth. There must be no defect, such as blisters, shrinkage, cracks, etc. It
shall meet the requirements of QC/T 747-2006 or drawings and related
technical conditions.
4.1.2 Working voltage of coil
The working voltage of the fan clutch's coil shall generally be 24V ± 4V and 12V
± 2V; OR it shall meet the requirements of the drawing and related technical
conditions.
4.1.3 Working voltage of Hall speed sensor
The working voltage of the fan clutch's Hall speed sensor shall generally be
3.8V ~ 24V; OR it shall meet the requirements of the drawing and related
technical conditions.
4.1.4 Working frequency of pulse width modulation signal
The working frequency of the pulse width modulation signal of the fan clutch
shall generally be 1Hz ~ 10Hz; OR it shall meet the requirements of the
drawings and related technical conditions.
4.1.5 Working environment temperature
The working environment temperature of the fan clutch shall be -41°C ~ 125°C;
OR it shall meet the requirements of drawings and related technical conditions.
4.1.6 Cleanliness
The cleanliness in the working chamber of the fan clutch shall meet the
requirements of QC/T 572-1999 or drawings and related technical documents.
4.1.7 Dynamic balance
The dynamic balance performance of the rotating parts of the fan clutch shall
meet the requirements of QC/T 747-2006 or drawings and related technical
documents.
4.1.8 Main bearing seal
When tested according to the requirements of 5.1, the sealing performance of
the main bearing of the fan clutch shall meet the requirements of QC/T 747-
2006 or drawings and related technical documents.
4.2 Performance requirements
4.2.1 Open-loop performance
4.2.1.1 Response feature
a) Engaged response feature
Carry out the test in accordance with clause 5.2.5.1. The open-loop
engaged response feature of the fan clutch shall meet the requirements
of the drawing and related technical conditions. In general, the engaged
response time of the fan clutch shall be not more than 18s; the fully
engaged speed slip rate shall be not more than 8%.
b) Disengaged response feature
Perform the test in accordance with clause 5.2.5.1. The open-loop
disengaged response feature of the fan clutch shall meet the
requirements of the drawing and related technical conditions. Under
normal circumstances, when the input speed is 1000r/min, the
disengaged response time of the fan clutch shall be not more than 260s;
the fully disengaged speed shall be less than 450r/min.
4.2.1.2 Pulse width modulation feature
Carry out the test in accordance with clause 5.2.5.2. The open-loop pulse width
modulation feature of the fan clutch shall meet the requirements of the drawing
and relevant technical conditions. Under normal circumstances, the start rising
speed for the engagement of the fan clutch shall not exceed 500r/min; the rising
Perform the test in accordance with clause 5.3.3. The fan clutch's
superimposed AC voltage performance shall reach level A, which is defined in
GB/T 28046.1-2011.
4.3.4 Voltage ramp-down and ramp-up performance
Perform the test in accordance with clause 5.3.4. The voltage ramp-down and
ramp-up performance of fan clutch shall reach the supply voltage range, in
Table 1 and Table 2, as well as the level D, which is defined in GB/T 28046.1-
2011.
4.3.5 Voltage transient change performance
The test is carried out in accordance with clause 5.3.5. The performance of the
transient change of the power supply voltage of the fan clutch shall reach the
level B, which is defined in GB/T 28046.1-2011.
4.3.6 Reverse voltage performance
Perform the test in accordance with clause 5.3.6. The reverse voltage
performance of the fan clutch shall reach the level C, which is defined in GB/T
28046.1-2011.
4.4 Electromagnetic immunity performance
Perform the test in accordance with clause 5.4. The electromagnetic immunity
performance of the fan clutch shall meet the requirements of the drawing and
related technical conditions.
4.5 Reliability
4.5.1 Durability of bench
Perform the test in accordance with clause 5.5.1. After the test, the fan clutch
shall have no oil leakage; the labyrinth groove has no scratch; the silicone oil
has no discoloration or deterioration; the bearing has no jamming; the parts
have no damage or deformation; the fasteners have no loosening; the insulation
status of the power cable's connection points and conductors shall be intact;
the performance of the fan clutch shall meet the requirements of clause 4.2.
4.5.2 High and low temperature performance
Perform the test in accordance with clause 5.5.2. After the test, the fan clutch
shall have no oil leakage; the silicone oil has no discoloration or deterioration;
the bearing has no jamming; the parts have no damage or deformation; the
fasteners have no loosening; the non-metallic parts are not aged; the insulation
status of the power cable's connection points and conductors shall be intact;
the performance of the fan clutch shall meet the requirements of clause 4.2.
4.5.3 Corrosion resistance
Carry out the test in accordance with clause 5.5.3. After the test, the surface
corrosion of the metal parts of the fan clutch shall meet the requirements of the
drawing and relevant technical conditions.
4.5.4 Vibration resistance
Carry out the test in accordance with clause 5.5.4. After the test, the fan clutch
shall have no oil leakage; the bearing has no jamming; the labyrinth groove has
no scratch; the parts have no damage or deformation; the fasteners have no
loosening; the insulation status of the power cable's connection points and
conductors shall be intact; the performance of the fan clutch shall meet the
requirements of clause 4.2.
4.5.5 Strength performance of coil's lead-out wire harness
Perform the test in accordance with clause 5.5.5. After the test, the wiring
harness shall be free of damage; the non-metallic parts shall be free of cracks
or deformations; the connection points shall be firm; the conductor's insulation
status is intact; the performance shall meet the requirements of the drawing or
related technical documents.
5 Test method
5.1 Sealing performance test of main bearing
5.1.1 Sealing performance test at normal temperature
The test shall be carried out, in accordance with 6.1.1 of QC/T 33-2006.
5.1.2 High and low temperature sealing performance test
The test shall be carried out, in accordance with 6.1.2 of QC/T 33-2006.
5.2 Performance test
5.2.1 Environmental conditions
The test environment temperature shall be 25°C ~ 90°C. The temperature shall
be controlled at the set temperature ±5°C. The relative humidity is 25%RH ~
85%RH. The atmospheric pressure is 86kPa ~ 106kPa. If there are other
requirements, they can be implemented, according to the drawings or relevant
technical documents.
5.4 Electromagnetic radiation immunity test
The electromagnetic radiation immunity test shall be carried out, according to
the high current injection method AND the free field method, respectively. The
frequency of the high current injection method is 1MHz ~ 400MHz. The
frequency of the free field method is 200MHz ~ 2.5GHz and 2.7 GHz ~ 3.2GHz.
According to GB/T 17619-1998, use the large current injection method to carry
out test. The current size is in accordance with the requirements of the technical
documents. The free field method test shall be carried out, in accordance with
GB/T 17619-1998; the electric field strength shall be in accordance with the
requirements of the technical documents.
5.5 Reliability test
5.5.1 Bench durability test
The fan clutch and fan assembly, that have passed the performance test, shall
be installed on the reliability test bench, at room temperature. Add a gasket,
between the input flange of the clutch and the output flange of the test bench,
to make the end face runout of 0.15mm ~ 0.2mm, at a position of 100mm
rotating diameter of the fan clutch's input end flange, OR set the end face runout,
according to the relevant technical documents.
Set the input speed of the fan clutch, the pulse width modulation signal, the
working frequency of pulse width modulation signal. The input speed is
determined, based on specific working conditions. The pulse width modulation
signal is determined, according to the engaged and disengaged status of the
fan clutch, in each test working condition. The speed, under the specific working
condition, is generally the input speed of the fan clutch, which is corresponding
to the rated working condition of the engine. 1 cycle is composed of 7 working
conditions, each cycle is 1h, for a total of 500h. Refer to Figure 8 -- Schematic
diagram of the durability performance test curve of the fan clutch bench, AND
Table 2 -- Durability performance test table of the fan clutch bench.
6.2 Exit-factory inspection
Products can only leave the factory, after they pass the inspection by the quality
inspection department of the manufacturer, AND being attached with the
product quality qualification documents.
6.3 Type inspection
Type inspection is required for products in the following situations:
a) When the new product is type finalized AND the old product is subject to
trans-plant production;
b) When materials and processes have undergone major changes;
c) When the production is restored after suspension for more than 1 year;
d) During normal production, it is performed once a year, OR as agreed
between the supplier and the buyer.
7 Marking, packaging, transportation, storage
7.1 Marking
The marking position, size, method of products and packaging shall be
implemented, in accordance with the requirements of drawings or related
technical documents.
7.1.1 Product marking
a) The manufacturer's logo or trademark;
b) Product drawing number;
c) Production flow code;
d) Date of production.
7.1.2 Packaging mark
a) Manufacturer and address;
b) Product name and code;
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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