Automotive Clutch Friction Coefficient Test Machine ASTM Standard
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The Automated Clutch Friction Test Machine is a laboratory test system designed to evaluate friction, wear behavior, and thermal performance of wet clutch friction components under controlled load, speed, and lubrication conditions. The machine operates using a single original-manufactured friction pair, allowing detailed analysis of friction characteristics that cannot be obtained from full clutch pack or small-scale specimen testing.The system supports precise speed control, closed-loop load application, temperature regulation, and automated data acquisition, making it suitable for standardized clutch friction research and comparative performance evaluation.
Standards
GB/T 13986 — Determination of Friction Characteristics of Automotive Wet Clutches
JASO M349 — Test Method for Wet Clutch Performance
ISO 6312 — Automotive Clutch Friction Performance Testing
SAE J2491 — Clutch Friction and Wear Test Method
ASTM D3703 — Determination of Friction Properties of Friction Materials
Parameters
| Item | Technical Parameters |
|---|---|
| Friction pair size | Mean friction radius 35–125 mm |
| Maximum specimen diameter | 286 mm |
| Small specimen friction radius | 15 mm |
| Speed control ratio | 100:1 |
| Drive motor | AC motor, 4 kW, encoder feedback |
| Load range (low load) | 50 – 1.000 N |
| Load range (high load) | 250 – 10.000 N |
| Load actuation | Pneumatic bellows, closed-loop control |
| Torque measurement | Strain gauge torque transducer |
| Maximum torque | 180 Nm |
| Torque arm radius | 187 mm |
| Heating method | Electrical resistance heating |
| Heating power | 3 kW |
| Temperature range | 40 – 200 °C |
| Temperature sensor | Type K thermocouple |
| Cooling method | Circulating heat transfer fluid |
| Cooling flow rate | Up to 4 L/min |
| Controlled parameters | Speed, load, temperature, test duration |
| Measured parameters | Speed, load, friction torque, temperature, friction coefficient, time |
| Power supply | 380/415 V, three phase, 50/60 Hz |
| Compressed air | 4 cfm @ 8 bar |
| Cooling water | 10 L/min (typical) |
| Machine dimensions | 600 × 800 × 1.000 mm |
| Machine weight | 400 kg |
Features
(1) Single friction pair test configuration enabling detailed friction characterization
(2) Wide speed control range with stable operation down to zero speed
(3) Closed-loop pneumatic load application with force feedback
(4) Modular clamping system accommodating different clutch plate diameters and spline types
(5) Integrated heating and cooling for controlled thermal test conditions
(6) Accurate friction torque measurement independent of load application
(7) Automated test sequencing and continuous data recording
(8) Safety protection including mechanical overload limitation and software alarms
Accessories
(1) Modular clutch plate clamping system for different diameters and spline geometries
(2) Pneumatic load application assembly with force transducer
(3) Temperature sensors for lubricant and specimen surface monitoring
(4) Heat transfer fluid circulation module for cooling
(5) Electrical resistance heating elements
(6) Safety guarding and mechanical overload protection components
(7) PC-based control and data acquisition system
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