Electronically controlled silicon oil fan clutch

Abstract

An electronically controlled silicon oil fan clutch, comprising a housing, a front cover, an oil storage chamber, a driving shaft inserted in the housing, and a driving plate arranged on the driving shaft, the front cover is sealed and connected with the housing to form an inner space, the The inner space has an engaging chamber and a channel for circulating silicone oil that connects the engaging chamber and the oil storage chamber, and a valve plate is provided between the oil storage chamber and the engaging chamber to control the opening of the oil outlet hole of the oil storage chamber. It is characterized in that the solenoid valve is fixedly connected with the front cover to form an oil storage chamber, the oil outlet hole is opened on the front cover, the solenoid valve is connected with the electronic control unit of the engine through a wiring harness, and the solenoid valve drives and connects the valve plate after power-on, so that the valve plate rotates with the engine. The oil outlet hole cooperates to control the flow of silicone oil from the oil storage chamber to the meshing chamber. Compared with the prior art, the present invention has the advantages of fast response, little external influence, various control elements and high control precision.

Description

technical field [0001] The invention relates to an engine cooling system assembly, in particular to a silicone oil fan clutch. Background technique [0002] Energy saving 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] However, 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 the quality of the temperature sensing parts is poor. Due to individual differences, 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 heat dissipation The temperature of the sensor is limited, and 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; sixth, the control element is single, and it can only be adjusted and controlled by the temperature of the radiator; seventh, Passive control can only be activated 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, which depends on the product structure, and the structure is fixed and cannot be too large. complicated

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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