Silicon oil fan clutch

Abstract

The present invention relates to a silicon oil fan clutch which comprises a casing and a front cover. The front cover is sealed and connected with the casing to form an internal space. The internal space comprises an oil storage cavity and a meshing cavity. A valve plate which controls silicon oil circulation between the oil storage cavity and the meshing cavity is arranged between the oil storage cavity and the meshing cavity. The silicon oil fan clutch is characterized in that the clutch also comprise an electromagnet which can absorb the valve plate to close after being electrified and a wiring harness which is connected with an electronic control unit; the electromagnet consists of an iron core and a coil which is arranged on the iron core; the valve plate is elastic under the state without stress; due to self elasticity, the valve plate opens an oil storage hole leading the oil storage cavity to the meshing cavity. Compared with the prior art, the silicon oil fan clutch also has the advantages that the silicon oil fan clutch is free of a temperature sensing ring at the traditional silicon oil fan clutch and adopts the electronic control unit, thereby having the advantages of high precision, fast response and large temperature control range.

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 sensing part is limited; sixth, the control element is single, and the control can only be adjusted by the temperature of the radiator; seventh, passive control , can only act after the temperature of the radiator changes; eighth, only open-loop control can be realized; ninth, only fixed and simple control logic can be realized, and it can be realized by product structure, and the structure is fixed and cannot be too complicated

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