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QC/T 1025-2016 (QC/T1025-2016)

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QC/T 1025-2016: PDF in English (QCT 1025-2016)
QC/T 1025-2016
QC
NATIONAL AUTOMOTIVE INDUSTRY
STANDARD OF THEPEOPLE’S REPUBLIC OF CHINA
ICS 43.040.50
T 21
Performance Requirements and Bench Test
Methods of Automatic Transmission Oil Pump
ISSUED ON. JANUARY 15, 2016
IMPLEMENTED ON. JULY 1, 2016
Issued by. Ministry of Industry and information Technology of PRC
Ministry of Industry and information Technology of PRC.
Announcement
Year 2016 No.3
It is hereby announced that the Ministry of Industry and Information Technology
approved 643 industry standards (standard numbers, names, major contents and
starting date of implementation can refer to Annex) including the Piston Vacuum Pump;
thereof, there are 214 mechanical industry standards, 7 automotive industry standards,
1 aviation industry standard, 59 light industry standards, 110 chemical industry
standards, 21 metallurgical industry standards, 6 building material industry standards,
20 petrochemical industry standards, 6 civil explosion industry standards, 132
electronic industry standards, and 67 communication industry standards.
The above mechanical industry standards are published by Mechanical Industry Press;
automotive industry standards are published by Science and Technology Literature
Press; engineering construction standards in chemical industry are published by China
Planning Press; aviation industry standard is organized to publish by China Aero-
Polytechnology Establishment; light industry standards are published by China Light
Industry Press; chemical industry standards are published by Chemical Industry Press;
metallurgical industry standards are published by Metallurgical Industry Press; building
material industry standards are published by Building Material Industry Press;
petrochemical industry standards are published by China Petrochemical Press; civil
explosion industry standards are organized to publish by Nuclear Research Institute of
Standardization of China Ordnance Industry; electronic industry standards are
organized to publish by China Electronics Standardization Institute of Ministry of
Industry and Information Technology; communication industry standards are published
by People’s Posts and Telecommunications Press.
Annex. standard numbers, names, starting dates of implementation of 7 automotive
industry standards
Ministry of Industry and Information Technology of PRC.
January 15, 2016
Annex.
Standard Numbers, Names, Starting Dates
of Implementation for 7 Automotive Industry Standards
SN Standard Numbers Standard Names
Replaced
Standard Numbers
Starting Date of
Implementation
215 QC/T 1025-2016 Performance Requirements and Bench Test Methods of Automatic Transmission Oil Pump July 1, 2016
216 QC/T 1026-2016 Performance and Determination of PVC Slush Skin of Automotive Instrument Panel July 1, 2016
217 QC/T 1027-2016 Technical Requirements for Film Mounted Motor Vehicle Glass July 1, 2016
218 QC/T 1028-2016 Performance Requirements and Test Methods of Vehicle Vacuum Check Valve July 1, 2016
219 QC/T 1029-2016 Polypropylene (PP) Cellular Board Production Vehicles July 1, 2016
220 QC/T 1030-2016 Bus Push-Out Emergency Window July 1, 2016
221 QC/T 678-2016 Pneumatic Driving Pump of Passenger Door of Bus QC/T 678-2001 July 1, 2016
Table of Contents
Foreword ... 5
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 6
4 Performance Requirements ... 7
5 Test Equipment and Test Conditions ... 8
6 Test Methods ... 9
Performance Requirements and Bench Test
Methods of Automatic Transmission Oil Pump
1 Scope
This Standard specifies the terms and definitions, performance requirements and
bench test methods of automatic transmission oil pump for vehicles.
This Standard is applicable to the oil pump providing hydraulic pressure and lubrication
to the automatic transmission for the passenger cars; excluding the electric-controlled
oil pump.
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.
ISO 16232 Road Vehicles – Cleanliness of Components of Fluid Circuits
3 Terms and Definitions
The following terms and definitions are applicable to this Standard.
3.1 Automatic transmission oil pump
The oil supply device that provides the hydraulic oil with certain pressure and flow rate
to the fluid torque converter, double clutch, hydraulic control system and oil cooling
system of the automatic transmission; and ensures to meet the requirements of
lubrication for the friction pairs of the planetary gear mechanism.
3.2 Minimum performance test
The performance requirement point with minimum required liquid amount, when the
transmission uses different shifter positions.
3.3 Flow (Q)
At a given pressure, speed and temperature, the outputted liquid volume from the
pump outlet within the unit time, in L/min.
3.4 Pressure (P)
The pressure on the pump outlet, in kPa.
3.5 Theoretical displacement
The liquid volume outputted when the rotor rotates a circle.
3.6 Actual displacement
The liquid volume actually outputted when the rotor rotates a circle.
3.7 Safety relief pressure (Pk)
The minimum pressure from the oil pump outputted pressure that can open the safety
valve, in kPa.
3.8 High speed fill limit
Under the fixed pressure and temperature conditions, the actual oil pump speed where
the pump output flow begins to deviate from the theoretical flow; in rpm.
3.9 Contamination
The remaining weight on the surfaces of all parts that contact with the fluid, and pass
through the fixed and specified filter film.
3.10 Idle condition
It indicates the engine is in the no-load running state; namely, the clutch is in the joint
position, and transmission is in the neutral position.
4 Performance Requirements
4.1 Under the working condition of minimum performance test, the flow of automatic
transmission oil pump shall not exceed the requirements of minimum performance test.
Meanwhile, under the idle working condition, the volumetric efficiency of minimum
performance test shall be greater than or equal to 70%. Under the working condition
of high-and-medium speed and high pressure, the volumetric efficiency of the minimum
performance test shall be greater than or equal to 58%.
4.2 After the automatic transmission oil pump performing the pump initial
performance test as per Sub-clause 6.1.2, the percentage of difference between the
maximum and minimum torques measured before and after the test taking the initial
6.2.4 During the oil pump reliability test, the oil plants are allowed to supplement, but
the oil pump is not allowed to be replaced.
6.2.5 During the oil pump reliability test, adjusting and repairing the test sample are
not allowed; during the test, if the test is terminated due to the failure of the oil pump,
the oil pump shall be regarded as disqualified.
6.2.6 After completing the oil pump reliability test time, perform the performance test
as per the requirements in the performance test report; compared with pre-test phase,
the reducing performance index shall be less than or equal to 10%; and the flow shall
be no less than the requirements for minimum flow of oil pump.
6.3 Contamination test
6.3.1 The contamination test shall be performed as per the method stipulated in ISO
16232.
6.3.2 In view of the inconsistency of transmission oil products, and the compatibility
of cleaning medium with the transmission oil, the manufacture recommended cleaning
medium shall be preferred to use.
6.3.3 The cleaning area mainly indicates the internal surface of the transmission that
may contact with the transmission oil; while the exposed external surface has no
requirements for contamination test. In addition, the threaded hole doesn’t require the
contamination test; when cleaning, it is recommended to clean the threaded holes
plugged by screw.
6.3.4 The filter screen specification shall meet the requirements of transmission
manufacturer; at least 2 different specification filter screens must be installed onto the
manufacturer’s contamination test equipment.
......
 
(Above excerpt was released on 2017-07-09, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/QCT1025-2016