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| AR Services and Capabilities > Automatic Transmission Fluid Testing > Friction Testing |
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Friction Testing |
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Automotive Research has seven SAE #2 high speed Friction test stands (3600 rpm), a variable high/low speed stand (0-3600 rpm), and a variable low speed stand (0-300 rpm).
High speed tests evaluate the frictional performance of a clutch and fluid combination while stopping a rotating mass. A test head installed on the motor output shaft holds the clutches. Some clutches attach to the motor shaft (rotating) and some attach to the test head (stationary). The motor rotates a flywheel, cuts off, then the clutch pack is applied through a pressure actuation system. The stopping event is recorded and analyzed to determine coefficients of friction (calculated from measured torque) at various points in the stopping event.
The low speed tests evaluate frictional performance of a clutch and fluid combination while rotating at a low speed. These tests were developed to evaluate continuously slipping clutches commonly found in late model transmission torque converters, and a fluid's tendency to cause torque converter shudder.
Test heads can accommodate clutch plates, up to 6" in diameter, or band-over-drum clutches.
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Standardized lubricant evaluation tests supported include:
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- DEXRONŽ Plate (high speed plate clutch)
- DEXRONŽ Band (high speed band/drum clutch)
- DEXRONŽ Low Speed Friction (low speed plate clutch)
- MERCONŽ Clutch Friction Durability (high speed plate clutch)
- MERCONŽ Anti-Shudder Durability (low speed plate clutch with high speed clutch/fluid aging)
- Allison Graphite (high speed plate clutch)
- Paper Friction (high speed plate clutch)
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| In addition to lubricant evaluation, the SAE #2 test stands can be configured to evaluate clutch material frictional characteristics. Tests can be customized through a combination of cycle time, number of cycles, clutch apply pressure, inertial load, and rotational speed. |
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Americas:
- Toll Free USA: 1 888 400 0084
- All Others: +01 281 971 5600
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| Europe: +44 1708.680.248 |
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Intertek AR is located at:
5404 Bandera Road
San Antonio, Texas
78238-1993 USA
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