QC/T 1147-2021 English PDF (QCT1147-2021)

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QC/T 1147-2021: Electronic silicon oil fan clutch for vehicle engine
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...