Automatic Transmission Fluid Anti-Shudder Friction Tester
The Passenger Vehicle Automatic Transmission Fluid Anti-Shudder Friction Tester is a specialized friction testing system designed to evaluate the friction characteristics and anti-shudder durability of automatic transmission fluids (ATF) under controlled pressure, speed, and temperature conditions.
You can use this tester to accurately simulate the real operating conditions of wet friction pairs in automatic transmissions, enabling quantitative analysis of friction behavior during running-in, low-speed operation, and long-term durability. It provides reliable technical support for lubricant development, quality control, and compliance verification.
Application
You can apply this tester to a wide range of automotive transmission fluids, friction materials, and research scenarios, including:
(1) Passenger vehicle automatic transmission fluids (ATF)
(2) Dual clutch transmission fluids (DCTF)
(3) Continuously variable transmission fluids (CVTF)
(4) Lubricants for wet clutch systems
(5) Automatic transmission friction plates and steel plates
(6) Anti-shudder performance development of new lubricant formulations
(7) Durability evaluation and performance degradation analysis of in-service fluids
Typical users include petrochemical companies, lubricant manufacturers, vehicle and transmission OEMs, third-party testing laboratories, universities, and research institutes.
Standards
The tester is designed to meet and support the following domestic and international standards and test methods:
(1) GB/T 11118 — Tribological Performance Test Methods for Lubricants
(2) GB/T 3142 — General Test Methods for Lubricant Viscosity and Performance
(3) JASO M348 — Friction Characteristics Test Method for Automatic Transmission Fluids
(4) SAE No.2 — Friction Test Method for Automatic Transmission Fluids
Note: Differences in speed profiles, loading modes, temperature programs, and data processing requirements among standards can be accommodated through software parameter configuration.
Parameters
| Category | Parameter | Technical Specification | Remarks |
|---|---|---|---|
| Load system | Axial load range | 200 N – 10,000 N | Servo-hydraulic loading |
| Load indication relative error | ±0.5% | ||
| Long-term load holding error | ±0.05 MPa | ||
| Stroke | Axial loading stroke | 150 mm | |
| Friction measurement | Maximum friction torque | 320 N·m | |
| Friction torque relative error | ±2% | ||
| Drive system | Sliding speed range | 0.01 – 1.5 m/s | Continuously adjustable |
| Speed control accuracy | ±0.01 m/s | ||
| Drive motor | 380 V / 11 kW | AC servo motor | |
| Temperature control | Temperature range | –30 °C to 200 °C | Indirect heating & cooling |
| Temperature control accuracy | ±2 °C | ||
| Heating power | 220 V / 300 W | ||
| Cooling power | 220 V / 2.37 kW | ||
| System power | Total power | 16.5 kW | Including load, drive, temperature |
| Control & monitoring | Time setting range | 1 s – 9999 min | |
| Real-time monitored parameters | Load, friction force, speed, temperature, time |
Features
(1) Servo-hydraulic constant-force loading ensures high stability and fast response of axial load
(2) AC servo drive system meets strict accuracy requirements for low-speed friction testing
(3) Supports both LVFA low-speed friction tests and SAE No.2 durability test modes
(4) High-precision strain-gauge sensors simultaneously measure load and friction torque
(5) Integrated heating and cooling temperature control system enables wide temperature testing
(6) Integrated control and data acquisition system provides fully automated test operation
(7) Built-in μ–V curve analysis and anti-shudder life evaluation logic reduces operator influence
Accessories
(1) Friction plate fixture for standard friction plate sizes
(2) Steel plate fixture compliant with JASO and SAE requirements
(3) Servo-hydraulic axial loading unit
(4) Temperature-controlled oil bath with heating and cooling
(5) Industrial all-in-one computer with control and analysis software
(6) Sealing components for routine replacement
(7) Operation manual
Test Procedures
(1) Install the friction plate and steel plate with proper coaxial alignment
(2) Fill the test chamber with the specified volume of transmission fluid
(3) Perform the running-in stage according to the selected standard
(4) Execute μ–V characteristic tests using defined speed steps
(5) Conduct durability cycling tests to monitor friction coefficient evolution
(6) Stop the test automatically upon completion of the programmed cycle
(7) Remove samples and inspect wear condition
(8) Generate test curves and reports using the software system
Maintenance Information
(1) Check fixture alignment before each test to prevent eccentric loading
(2) Set running-in and test parameters strictly according to the applicable standard
(3) Do not exceed the specified axial load and temperature limits
(4) Allow natural cooling after high-temperature tests before disassembly
(5) Regularly calibrate load, speed, and temperature sensors
(6) Replace sealing components periodically to ensure system reliability
FAQ
1. What is this product?
It is a friction testing system used to evaluate the anti-shudder performance and durability of automatic transmission fluids under simulated operating conditions.
2. What is this product used for?
You use it to study friction characteristics, low-speed behavior, and anti-shudder life of ATF, DCTF, and CVTF, as well as friction materials.
3. What is the working principle of this product?
A controlled axial load is applied to a friction plate and steel plate pair, while speed and temperature are precisely regulated. Friction force data are collected to calculate friction coefficients and μ–V curves.
4. Why is this product important?
It helps you ensure transmission fluids meet performance requirements, reduce shudder risks, and comply with international testing standards.
5. What industries is this product suitable for?
Lubricant manufacturers, automotive OEMs, transmission suppliers, testing laboratories, universities, and research institutes.
6. What types of this product are available?
The system can be configured or customized for different load ranges, speed ranges, temperature limits, and test standards based on your testing requirements.
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