습식클러치 마찰재의 체결 거동에 의한 마찰열 해석
Frictional Heat Generation in Wet Clutch Engagement according to Groove Pattern on Clutch Pad
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초록
Frictional heat greatly influences the friction behaviors during clutch engagement. Therefore, theengagement of a wet or dry clutch is frequently not under control by the frictional heat. In a wet clutch, the frictionaltemperature also specially needs to be controlled, and in many cases, the clutch material is selected to preventa temperature rise from the friction between friction pad and separator. However, only the selection of theclutch material cannot ensure sufficient control of the temperature rise by the friction. The groove pattern on afriction pad is designed for more flow rates of transmission fluid between the contact gap of clutch pad and separatorfor the cooling effect. In this work, grove patterns are designed for more flow rates out of the contact gapbetween friction pad and separator plate. Selected groove design shows the improvement flow rates of transmissionfluid through both inner and outer radius, where most of the transmission fluid flows through the outerradius when the clutch is engaged due to the centrifugal force in conventional wet clutch groove. Several comparisonsof the amounts of frictional heat generated on clutch pads are made in order to verify the decrease ofthe temperature rise according to the flow rates along the groove patterns.
Abstract
Frictional heat greatly influences the friction behaviors during clutch engagement. Therefore, theengagement of a wet or dry clutch is frequently not under control by the frictional heat. In a wet clutch, the frictionaltemperature also specially needs to be controlled, and in many cases, the clutch material is selected to preventa temperature rise from the friction between friction pad and separator. However, only the selection of theclutch material cannot ensure sufficient control of the temperature rise by the friction. The groove pattern on afriction pad is designed for more flow rates of transmission fluid between the contact gap of clutch pad and separatorfor the cooling effect. In this work, grove patterns are designed for more flow rates out of the contact gapbetween friction pad and separator plate. Selected groove design shows the improvement flow rates of transmissionfluid through both inner and outer radius, where most of the transmission fluid flows through the outerradius when the clutch is engaged due to the centrifugal force in conventional wet clutch groove. Several comparisonsof the amounts of frictional heat generated on clutch pads are made in order to verify the decrease ofthe temperature rise according to the flow rates along the groove patterns.
참고문헌 (13)
- Analysis of Temperature and Stresses in Wet Friction Disks Involving Thermally Induced Changes of Contact Pressure, "Zagrodzki, P", SAE, ~, pp.SAE Technical Paper No. 982035 (1998)
- Modeling Heat Transfer in a Wet Clutch, "Pacey, D", SAE, ~, pp.SAE Technical Paper No. 901655 (1990)
- Zagrodzki, P, "Generation of Hot Spots in a Wet Multidisk Clutch During Short-Term Engagement", Wear, 254, pp.474~491 (2003)
- CFD Modeling of Squeeze Film Flow in Wet Clutch, "Cho, J", SAE, ~, pp.SAE International No. 01-1236 (2011)
- Flash Temperature in Clutches, "Cameron, T. M", SAE, ~, pp.SAE Technical Paper No. 01-3890 (2005)
- CFD Simulation of the Flows Within Disengaged Wet Clutches of an Automatic Transmission, "Yuan, Y", SAE, ~, pp.SAE Technical Paper No. 2003-01-0320 (2003)
- Modeling of Heat Transfer and Fluid Hydrodynamic for a Multidisc Wet Clutch, "Yang, Y", SAE, ~, pp.SAE Technical Paper No. 950898 (1995)
- Modeling of Wet Clutch Engagement Including a Thorough Experimental Validation, "Deur J", SAE, ~, pp.SAE Technical Paper No. 2005-01-0877 (2005)
- Jang, J, "Three-Dimensional Thermohydrodynamic Analysis of a Wet Clutch With Consideration of Grooved Friction Surfaces", ASME J. of Tribol, 133, pp.011703-1~011703-12 (2011)
- Edward J. Berger, "Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy", 박사, pp.1996
- 김해용, "습식클러치 패드의 Groove 패턴에 의한변속기유의 동적 거동", 한국윤활학회지, 30(2), pp.92~98 (2014), 한국윤활학회[DOI]
- Analysis of the Various Factors Affecting Drag torque in Multiple- Plate Wet Clutches, "Kitabayashi, H", SAE, ~, pp.SAE Technical Paper No. 01-1973 (2003)
- Jang, S, "Analysis of ATF Behavior Characteristic in Friction Clearance by Friction Plate Modeling of Automatic Transmission Wet clutch", Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference, pp.292~299 (2008)