Transmission Fluid 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.
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 |
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
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