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Development of Linear Speed Controlled Viscous Fan Clutch for Engine Cooling System
paris98/f98t229

Authors

Kyu Hyun, Lee - Korea Automotive Technology Institute
Joo Heon, Lee - Korea Automotive Technology Institute
Bong Jip, Koo - Korea GMB Industries Co., Ltd.

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. 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 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.

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