| AUTOMOTIVE ENGINEERING |
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Torque characteristics of a controllable centrifugal clutch for electric vehicles |
| SONG Haijun1,2, SONG Jian1, FANG Shengnan1, LI Fei1, TAI Yuzuo1, TRUONG Sinh Nguyen1 |
1. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China;
2. Department of Mechanical Engineering, Academy of Armored Forces Engineering, Beijing 100072, China |
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Abstract The adjustments of the engaged speed and torque is key for the control of centrifugal clutchs in electric vehicles automatic transmission. The factors affecting the clutch torque characteristics were analyzed to model the contact torque on the centrifugal shoe. The models for the uniform centrifugal force on the centrifugal shoe and the contact pressure between the shoe and drum are simplified to get an analytical expression for the clutch torque β. The regulation characteristics of the clutch engage speed and the torque about β are analyzed for speeds of 0° to 90° for automatic transmissions for electric vehicles. A virtual clutch prototype is used to verify the clutch torque regulation characteristics. The results show that the basic characteristics of the clutch torque regulation well are reflected by the β-model.
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| Keywords
centrifugal clutch
electric vehicle
analytical model
contact speed
torque regulation
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Issue Date: 15 July 2017
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2017,
Vol. 57
