Transmission Fluid Anti-Shudder Friction Tester GB/T 11118
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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 |
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
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