A skylight noise reduction component and a method for determining its optimum opening

Abstract

The invention provides a skylight noise reduction assembly which comprises a front assembly, a rear assembly and a control unit. The front assembly comprises a front plate and a front driving mechanism. The rear assembly comprises a rear plate and a rear driving mechanism. The front driving mechanism and the rear driving mechanism are connected with the control unit. The front end of the front plate is connected with the front driving mechanism arranged at the front end of the inner edge of a skylight, and the rear end of the front plate can be overturned up and down under the action of the front driving mechanism; The rear end of the front plate can adhere to the end face of the front end of the rear plate, and the rear end of the rear plate can adhere to the rear end edge of the inner side of the skylight. The invention further provides a method for determining an optimal opening of the skylight noise reduction assembly. The skylight noise reduction assembly has the advantages that the opening of the front plate and the opening of the rear plate can be automatically adjusted according to concrete conditions of a vehicle; when the skylight is opened, the front plate changes the wind eddy dropping direction and position; if the rear edge of the front plate is in a sawtooth shape or a wave shape, dropping of a wind eddy can be avoided, and noises are reduced.

Description

Technical field [0001] The invention relates to a motor vehicle auxiliary equipment, in particular to a sunroof noise reduction component and a method for determining its optimal opening degree. Background technique [0002] When a car is driving at high speed, opening the sunroof will produce wind-induced noise with low frequency and high sound pressure level characteristics. This is because the relative speed of the air outside the sunroof and the air in the sunroof exceeds a certain value, and the unstable shear layer makes the vortex fall off from the front edge of the sunroof. When the frequency of the vortex shedding is the same as the natural frequency inside the car, resonance occurs and noise occurs. This situation will reduce the comfort of the car, easily make people tired and tired, and affect the safe driving of the car. Summary of the invention [0003] The purpose of the present invention is to provide a skylight noise reduction component capable of reducing noise ...

AI Technical Summary

Problems solved by technology

This is because the relative velocity between the air outside the sunroof and the air in the sunroof exceeds a certain value, and the shear layer is unstable, causing the vortex to fall off from the front edge of the sunroof. When the frequency of the vortex shedding is the same as the natural frequency inside the car, resonance occurs and noise is generated. This situation will reduce the comfort of the car, easily make people bored and tired, and affect the safe driving of the car

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