A pet cold air intake with resonant cavity

Abstract

The invention discloses a PET cold air inlet with a resonant cavity. The main pipeline of the air inlet is all made of PET material, including a PET upper part and a PET lower part, and a cavity shell wrapping the resonant cavity is arranged between the PET upper part and the PET lower part. , PET upper part and PET lower part are welded and fixed, and the resonant cavity is covered in the cavity shell, and the resonant cavity and the cavity shell are closely matched, so that the resonant cavity cannot move in the pipeline. The front end of the air inlet pipeline is preset with a fixed structure and the fixing nut is pre-embedded on the fixed structure, and the air inlet pipeline is fixed on the front frame by bolts, and the rear end of the air inlet pipeline is fastened to the air filter.

Description

technical field [0001] The invention relates to a vehicle air intake, in particular to a PET cold air intake with a resonant cavity. Background technique [0002] In the research and development process of the Hongqi car project, the air intake needs to achieve targeted noise reduction in the (500-600) Hz frequency band on the basis of satisfying broadband noise reduction. The definition of the pipeline scheme is based on the selection of PET materials. Resonant cavity: Due to the limitation of the surrounding of the vehicle, the overall length of the intake pipe is relatively short, and the front and rear are close to the engine and front-end frame. The resonant cavity can only be arranged on the side of the pipeline, where the welding seam of the PET pipeline is located, and direct welding cannot be used. The method is connected with the PET tube, so there is an urgent need for a new connection method between the resonant cavity and the PET tube. [0003] At present, the ...

AI Technical Summary

Problems solved by technology

like figure 1 As shown, the entire pipeline is divided into three parts: front plastic section 1+PET section+rear plastic section 5, and the resonant cavity is welded on the rear plastic section; The sections are connected together; the front plastic section is connected to the front frame, and the rear plastic section is connected to the air filter. In order to facilitate assembly, the rear plastic section needs to integrate a section of corrugation; the length of the PET section accounts for about 60%, the overall pipeline is longer, and the process is more complicated. And the plastic section will occupy part of the pipeline length, and the noise reduction effect will be greatly reduced

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