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Development of A Continuously Variable Speed Viscous Fan Clutch for Engine Cooling System
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English
Abstract
This paper presents a discussion of the development of a viscous fan clutch with continuous linear variable speed control function for engine cooling system to reduce cooling fan noise and improve the overall fuel efficiency of the engine. It is well known generally that the operation of the engine cooling fan is one of the major noise and vibration sources in an engine as well as the major power consumption device in engine. By applying a fan drive clutch having a continuous speed control device providing the proper cooling air flow rate proportional to engine cooling load, it can be expected that the fan driving horsepower can be reduced and also fan noise and vibration can be reduced significantly. In the present study it is shown that a viscous fluid fan clutch, for small and medium diesel engines (1 to 3.5 ton class), having a linear variable speed control function corresponding to cooling load and low temperature hysteresis has been developed. The results obtained show that the proposed design viscous fluid fan clutch can reduce the engine fan operational noise and vibration as well as the cooling fan driving horsepower significantly.
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Citation
Lee, K., Lee, J., and Koo, B., "Development of A Continuously Variable Speed Viscous Fan Clutch for Engine Cooling System," SAE Technical Paper 980838, 1998, https://doi.org/10.4271/980838.Also In
References
- Pisarski John J. “Fuel savings and Noise Reduction with Fan Drive” SAE 801013
- Takemura Toji “An Analysis of Viscous Coupling Torque Transmission Characteristics and Hump Phenomenon” SAE 900558
- Pouder John M. “Air Sensing Fan Drive Performance on Charge Air Cooled Engines” SAE 861944