This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Clutch Surface Temperature Measurements in a Controlled-Coupling Automatic Transmission
ISSN: 0148-7191, e-ISSN: 2688-3627
Published January 01, 1962 by SAE International in United States
Annotation ability available
Clutch plate surface temperatures were measured with estimated accuracy of ± 10 F in a controlled-coupling automatic transmission. Power input to the transmission was from a 394 cu in. displacement engine, and power output was absorbed by a flywheel and dynamometer. Surface temperature as a function of time was obtained by incorporating a thermocouple into the surface of one of the steel clutch plates in the transmission.
Operating parameters studied with respect to their effect on clutch surface temperature were dynamometer load, engine throttle setting, and transmission sump temperature. Dynamometer load had little effect on maximum clutch surface temperatures during clutch engagement for all transmission sump temperatures investigated. On the other hand, maximum clutch surface temperatures were found to increase with increasing throttle opening. Results agree with calculations of energy dissipated by the clutch during clutch engagement.
|Technical Paper||Shift Modulation of Allison Automatic and Powershift Transmissions|
|Aerospace Standard||Transmission Interlocks|
|Technical Paper||Fluid Performance in Automatic Transmissions|
CitationHaviland, M., "Clutch Surface Temperature Measurements in a Controlled-Coupling Automatic Transmission," SAE Technical Paper 620274, 1962, https://doi.org/10.4271/620274.
- Haviland M. L. and Rodgers J. J., “Friction Characteristics of Automatic Transmission Fluids as Related to Transmission Operation,” 15th ASLE Meeting, April 1960, Cincinnati, Ohio.
- Rodgers J.J. and Haviland M. L., “Friction of Transmission Clutch Materials as Affected by Fluids, Additives, and Oxidation,” SAE Summer Meeting, June, 1960, Chicago, 111.
- Davison E. D., “Effect of Lubricant on Automatic Transmission Clutch Plate Durability,” ASTM Fourth Pacific Area National Meeting, Los Angeles, Calif., 1962.
- Gallopoulos N. E., “Use of the Isoteniscope to Determine the Thermal Decomposition of Lubricants,” SAE Meeting, Detroit, Mich., January 1962.
- Underwood A. F. and Catlin A. A., “An Instrument for Continuous Measurement of Piston Temperatures,” SAE Trans., Vol. 48, No. 1, 1941.
- Automatic Transmission Fluid, Type A, Suffix A Identification Specification, General Motors Publication, November 1957.
- Moffat R. J., “The Gradient Approach to Thermocouple Circuitry,” 4th Symposium on Temperature, Its Measurement and Control, March 1961, Sponsored by Am. Inst. of Phys., ISA, and Nat. Bur. of Stand.
- SAE Aeronautical Information Report No. 65, Thermoelectric Circuits and Performance of Several Current Engine Thermocouples.
- Baker H. D., Ryder E. A., and Baker N. H. “Temperature Measurement in Engineering.” Vol. 1. New York: John Wiley and Sons, Inc., 1953.
- “Temperature - Its Measurement and Control in Science and Industry,” American Institute of Physics publication, Reinhold, 1941, New York, p 1309.
- Newcomb T. P., “Temperatures Reached in Friction Clutch Transmission,” J. Mech. Eng. Science, Vol. 2, No. 4, 1960.
- Baker H. D., Ryder E. A., and Baker N. H., “Temperature Measurement in Engineering,” Vol. II, New York: John Wiley and Sons, Inc., 1953.
- Conversion Tables for Thermocouples, Leeds and Northrup Co., Issue 2.
- Carslaw H. S. and Jaeger J. C., “Conduction of Heat in Solids,” 2nd Edition, Oxford Press, 1959, p 75.