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QC/T 1141-2020 English PDF (QCT1141-2020)

QC/T 1141-2020 English PDF (QCT1141-2020)

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QC/T 1141-2020: Automobile Clutch Release Bearing Assembly

This document specifies the technical requirements and bench test methods for automotive clutch release bearing assembly. This document is applicable to automotive mechanically and hydraulically controlled clutch release bearing assembly.
QC/T 1141-2020
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
ICS 43.040.50
T 21
Automobile Clutch Release Bearing Assembly
ISSUED ON: DECEMBER 09, 2020
IMPLEMENTED ON: APRIL 01, 2021
Issued by: Ministry of Industry and Information Technology of PRC
Annex:
Number, name, and date of implementation of 8 automobile industry
standards
No. Standard number Standard name
Replaced
standard number
Date of
implementation
479 QC/T 1136-2020
Environmental test requirements and test
methods of insulated-gate bipolar transistors
(IGBT) module for electric vehicles
2021-04-01
480 QC/T 1137-2020 Edging glass for automobiles 2021-04-01
481 QC/T 1138-2020
Sliding window glass assembly for
automobiles
2021-04-01
482 QC/T 1139-2020
Technical specification for auto parts
remanufacturing products - Connecting rod
2021-04-01
483 QC/T 1140-2020
Technical specification for auto parts
remanufacturing products - Crankshaft
2021-04-01
484 QC/T 1141-2020
Clutch release bearing assembly for
automobile
2021-04-01
485 QC/T 533-2020 Drive axle assembly for commercial vehicle
QC/T 533-1999
QC/T 534-1999
2021-04-01
486 QC/T 755-2020
Technical requirements for LNG vehicle gas
system
QC/T 755-2006 2021-04-01
Table of Contents
Foreword ... 6
1 Scope ... 7
2 Normative Reference ... 7
3 Terms and Definitions ... 7
4 Technical Requirements ... 8
5 Test Methods ... 10
Automobile Clutch Release Bearing Assembly
1 Scope
This document specifies the technical requirements and bench test methods for automotive clutch release bearing assembly.
This document is applicable to automotive mechanically and hydraulically controlled clutch release bearing assembly.
2 Normative Reference
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) is applicable to this document.
QC/T 1125-2019 Automobile Clutch System Terms and Definitions
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in QC/T 1125-2019 and the following apply.
3.1 Mechanically controlled clutch release bearing
A clutch release bearing that realizes clutch separation and engagement under the action of a mechanical mechanism.
3.2 Hydraulically controlled clutch release bearing
The clutch release bearing that realizes the clutch separation and engagement under the action of hydraulic pressure.
3.3 Self-aligning clutch release bearing assembly
Bearing assembly with automatic adjustment to realize the coaxial rotation performance of the clutch release bearing assembly and the clutch cover assembly. 3.4 Non-aligning clutch release bearing assembly
4.2 Aligning force
According to the test method specified in 5.1.2, the aligning force of self-aligning clutch release bearing assembly of a passenger car shall be 25~150N; and the aligning force of self-aligning clutch release bearing assembly of a commercial vehicle shall be 100~400N; for those with special requirements, they can be implemented according to customer's technical requirements.
4.3 Aligning displacement
According to the test method specified in 5.1.3, the aligning displacement of the self- aligning clutch release bearing assembly shall be no less than 1.0mm; for those with special requirements, they can be implemented according to the customer?€?s technical requirements.
4.4 Noise
According to the test method specified in 5.1.4, the noise of the clutch release bearing assembly of passenger cars shall not exceed 64dB (A); and the noise of the clutch release bearing assembly of commercial vehicles shall not exceed 74dB (A); for those with special requirements, they can be implemented according to customer's technical requirements.
4.5 Durability
After the durability test is completed in accordance with the test conditions specified in 5.1.5.1, any part of the clutch release bearing assembly shall not be damaged; the amount of wearing on the rotating end face of the bearing shall be no greater than 0.5mm; and the noise value after the test shall be no greater than 120% before the test; and it shall meet the performance requirements of 4.1, 4.2 and 4.3; and the hydraulically controlled clutch release bearing shall also meet the performance requirements of 4.6 and 4.7.
4.6 Pressure resistance
According to the test method specified in 5.2.6, the pressure drop of the hydraulically controlled clutch release bearing assembly of the commercial vehicle shall be less than 0.5MPa; and the pressure drop of the hydraulically controlled clutch release bearing assembly of the passenger car shall be less than 0.2MPa.
4.7 Low pressure sealing performance
According to the test method specified in 5.2.7, the pressure drop of the hydraulically controlled clutch release bearing assembly shall be less than 1kPa.
4.8 Low temperature performance
1 ?€? motor; 2 ?€? substitute flywheel; 3 ?€? clutch driven plate assembly; 4 ?€? heater; 5 ?€? clutch cover assembly; 6 ?€? insulation protective cover; 7 ?€? release bearing assembly; 8 ?€? force sensor; 9 ?€? connecting rod; 10 ?€? camshaft; 11 ?€? loading motor
Figure 5 ?€? Schematic Diagram of Durability Test of Clutch Release Bearing Assembly
5.2 Hydraulically controlled clutch release bearing assembly
5.2.1 Start-up torque test
The same as 5.1.1.
5.2.2 Aligning force test
The same as 5.1.2.
5.2.3 Aligning displacement test
The same as 5.1.3.
5.2.4 Noise test
The same as 5.1.4.
5.2.5 Durability test
5.2.5.1 Test conditions
The same as 5.1.5.1.
5.2.5.2 Test procedures
The hydraulically controlled clutch release bearing assembly and the matching clutch cover assembly and housing shall be installed on the test device shown in Figure 6 for durability test. After the test is completed, it shall be retested in sequence according to the test methods specified in 5.2.1, 5.2.2, 5.2.3, 5.2.4, 5.2.6 and 5.2.7.

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