Silicone oil fan clutch

Abstract

The invention relates to a silicon oil fan clutch, comprising a shell and a front cover; wherein, the front cover and the shell are connected in a sealing way to form internal space, the internal space is provided with an oil storage cavity and a gearing cavity, and a valve plate which controls flow of silicon oil between the oil storage cavity and the gearing cavity is arranged between the oil storage cavity and the gearing cavity; the invention is characterized in that the clutch also comprises an electromagnet which can pull in the valve plate after electricity is supplied and a temperature controlled switch which controls whether the electromagnet works or not; the electromagnet comprises an iron core and a coil arranged on the iron core, the valve plate is elastic, and with no force imposed upon, the valve plate opens an oil storage control hole through which the oil storage cavity leads to the gearing cavity owing to self-elasticity. Compared with the prior art, the silicon oil fan clutch has the advantages of eliminating a temperature sensing ring of the traditional silicon oil fan clutch and adopting an electric control unit, thus enjoying the advantages of high precision,quick response and wide range of temperature control.

Description

technical field [0001] The invention relates to an engine cooling system assembly, in particular to a silicone oil fan clutch. Background technique [0002] Saving energy is a long-term policy of the country's economic development. According to relevant research data, 5-10% of the energy of the car is consumed by the fan cooling of the engine. In fact, the car does not need fan cooling for most of the working time, and generally only 5-10% of the time requires fan cooling. The fan automatic clutch technology is an important key technology for automobile energy saving. For this reason, many technicians have carried out technical improvements to the fan automatic clutch. They generally adopt the structure of bimetallic temperature sensing parts, through which the bimetallic temperature sensing parts feel the temperature of the air blown from the radiator to produce thermal deformation to control the switch of the valve. [0003] The existing silicon oil fan clutch for automo...

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned clutches all use temperature sensing parts to control the opening and closing of the valve plate, so there are the following disadvantages: first, the response speed is slow, and the thermal deformation speed of the bimetallic temperature sensing parts is slow; second, the control accuracy is low, and there are individual differences in the quality of the temperature sensing parts , the thermal deformation is not ideally linear; third, it is susceptible to environmental interference, and the temperature of the air blown from the radiator is affected by the ambient temperature and the distance from the radiator to the temperature sensing element; fourth, the layout is limited, in order to feel the temperature of the radiator , the distance from the temperature sensor to the radiator is limited; fifth, the working temperature range is limited, and the thermal deformation of the temperature sensor is limited

Refer to the publication of Chinese invention patent application: CN1807917A, which discloses a "Control Method of Externally Controlled Fan Clutch", this clutch can only be applied to engines above Euro III, and many engines cannot be used

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