QC/T 33-2006 PDF in English
QC/T 33-2006 (QC/T33-2006, QCT 33-2006, QCT33-2006)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
| QC/T 33-2006 | English | 70 |
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Test methods of viscous fan clutch for automotive engines
| Valid |
| QC/T 33-1992 | English | 279 |
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(Car fan clutch test methods)
| Obsolete |
Standards related to (historical): QC/T 33-2006
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QC/T 33-2006: PDF in English (QCT 33-2006) QC/T 33-2006
INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Replacing QC/T 33-1992
Test Methods of Viscous Fan Clutch for
Automotive Engines
ISSUED ON. MARCH 7, 2006
IMPLEMENTED ON. AUGUST 1, 2006
Issued by. The National Development and Reform Commission
Table of Contents
FOREWORD ... 3
1 SCOPE ... 4
2 NORMATIVE REFERENCES ... 4
3 TERMS AND DEFINITIONS ... 4
4 TEST ITEMS ... 5
5 GENERAL REQUIREMENTS OF TESTS ... 6
6 TEST METHODS ... 6
7 TEST RESULT PROCESSING ... 8
APPENDIX A ... 9
TRANSLATION REFERENCE AND ORIGINAL CHINESE STANDARD ... 11
Foreword
This Standard is revised to satisfy the industry development needs of viscous fan clutch for
automotive engines, and for the convenience of supervision and inspection by quality
supervision department.
This Standard is the revision of "Automobile Fan Clutch Test Method" (QC/T 33-1992).
The main revisions of this Standard vs. QC/T 33-1992 are as follows.
- The chapter of "Terms and Definitions" was added;
- The more specific leakage test method was revised;
- The high and low temperature stability tests were added;
- The boundary conditions for temperature characteristic test were clearly specified;
- The power characteristic curve was deleted;
- The operating cycles of control units such as bimetallic strip was added, and the
reliability test specification was modified.
This Standard shall replace "Automobile Fan Clutch Test Method" (QC/T 33-1992) from the
implementation date.
Appendix A of this Standard is normative.
This Standard was proposed by the National Technical Committee on Automobiles of
Standardization Administration of China.
This Standard is under the jurisdiction of the National Technical Committee on Automobiles
of Standardization Administration of China.
Drafting organization of this Standard. China FAW Group Corporation R&D Center.
Chief drafting staffs of this Standard. Wang Ji, Han Mingfang, Li Kai and Duan Lian.
Test Methods of Viscous Fan Clutch for Automotive Engines
1 Scope
This Standard specifies test methods for the viscous fan clutch assembly that is used for
automotive engines and is matched with cooling fan.
This Standard is applicable to viscous fan clutch for automotive engines (hereinafter referred
as "viscous fan clutch").
2 Normative References
The following standards contain provisions which, through reference in this text, constitute
provisions of this Standard. For dated reference, subsequent amendments (excluding
corrections) or revisions do not apply to this Standard. However, the parties who enter into
agreement based on this Standard are encouraged to investigate the possibility of applying the
most recent editions of the standards. For undated references, the latest edition of the
normative document referred to applies.
GB/T 18297-2001 Performance Test Code for Road Vehicle Engines
3 Terms and Definitions
For the purpose of this Standard, the following terms and definitions apply.
3.1
Input speed
The driving speed during the test of viscous fan clutch.
3.2
Engaged temperature
When input speed is constant and it is at disengaged status, the viscous fan clutch undergoes
temperature rise as required; the temperature at the “start turning point” - when the fan
speed is increased significantly, until reaching the maximum speed, or the temperature when
it exceeds the speed specified by design, it is called the engaged temperature.
3.3
Engaged speed
At the engaged temperature, the fan speed which corresponds to input speed.
4.3 Type inspection
Performance test, reliability test and bearing leakage test of viscous fan clutch.
5 General Requirements of Tests
The instruments and meters used for tests shall be qualified through verification and be within
their effective service life.
5.1 Temperature
For thermometer, its accuracy shall not be less than Grade 0.5, its resolution shall be 0.1℃
and its time constant shall not be greater than 5s; the temperature sensor shall be placed with a
distance not further than 30mm to the front-end-center of viscous fan clutch.
5.2 Speed
The accuracy of the tachometer used for measuring the input speed and fan speed shall not be
less than Grade 0.2.
5.3 Test devices
The devices used for testing viscous fan clutch include driving device, air temperature control
device, air supply equipment, testing instrument and data collecting & processing system.
5.3.1 Driving device
The power and speed range of driving device shall meet the maximum power consumption
and maximum speed of the tested fan and viscous fan clutch assembly, the driving device
shall be capable of stepless speed-adjustment and its control accuracy shall be ±0.5%.
5.3.2 Air temperature control device
The air heater shall be capable of temperature adjustment, the heating rate shall be less than
10℃/min and shall be controlled within the range of 2℃/min~5℃/min in the engaged
temperature area; the cooling device may adopt cooling mode or cool-air-blowing mode, its
temperature drop rate shall be less than 10℃/min and shall be controlled within range of 4℃
/min~8℃/min at the disengaged temperature area.
5.3.3 Air supply equipment
The air supply equipment shall choose air blower or exhaust fan, and its air supply velocity
can be controlled at 5m/s~20m/s.
6 Test Methods
6.1 Bearing leakage test
6.1.1 Normal-temperature leakage test
At room temperature, APPLY 50kPa air pressure to one side of the double-side-sealed
deep-groove-ball-bearing and MAINTAIN the pressure for 30s. CONDUCT test on both sides.
Translation Reference and Original Chinese Standard
[1] QC/T 33-2006 Test methods of viscous fan clutch for automotive engines.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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