Air inlet manifold for supercharged gasoline engine

Abstract

The invention discloses an air inlet manifold for a supercharged gasoline engine, comprising a pressure stabilizing chamber made of an aluminum alloy material, an air inlet flange arranged at one end of the pressure stabilizing chamber, a first air passage, a second air passage, a third air passage, a fourth air passage and cylinder cover joint flanges, wherein the first air passage, the second air passage, the third air passage and the fourth air passage are communicated with the pressure stabilizing chamber; and the cylinder cover joint flanges are arranged at the mouths of the first air passage, the second air passage, the third air passage and the fourth air passage. The air inlet manifold is characterized in that: a connection part between the air inlet flange and the pressure stabilizing chamber is of a smooth transition structure; the bottom of the pressure stabilizing chamber is provided with two first bracket mounting lugs, and the lower part of the air inlet flange is provided with a second bracket mounting lug; and the first bracket mounting lugs and the second bracket mounting lug are respectively connected to a cylinder body through first brackets and a second bracket. By means of the air inlet manifold disclosed by the invention, the local vibration acceleration level and the local surface high-frequency vibration speed level are reduced under the condition of keeping a material of an air inlet manifold of a common naturally-aspirated engine unchanged, and the surface radiation noise is effectively reduced; and not only are using requirements of the supercharged gasoline engine met, but also the cost and the weight of the overall automobile are not increased on the premise of not increasing the material cost and the manufacturing process difficulty.

Description

technical field [0001] The invention relates to an air intake system of a gasoline engine, in particular to an air intake manifold of a supercharged gasoline engine. Background technique [0002] Gasoline engine supercharging can achieve the purpose of increasing power, improving economy and reducing emissions. With the promulgation of a large number of domestic energy-saving and emission-reduction policies and regulations, major automobile companies are paying more and more attention to turbocharging technology, and gasoline engine supercharging has become a trend. At present, the intake manifold of the supercharged gasoline engine is mostly made of aluminum alloy intake manifold, which is composed of the intake flange (local reinforcement), the cylinder head joint flange (air outlet), the pressure stabilizing chamber and the air passage, and the stabilizing chamber There are fuel rail installation straps, bracket installation straps, local reinforcing ribs, etc. arranged ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a supercharged gasoline engine intake manifold, which can not only ensure the reliability of the intake manifold, but also solve the problem of large low-frequency vibration acceleration of the intake manifold during high-load operation, easy cracking and air leakage. As well as the failure of electrical components, the local reinforced structure can be used to reduce the magnitude of high-frequency vibration on the local surface and reduce the radiation noise on the surface of the intake manifold; on the premise of not increasing the cost of materials and the difficulty of manufacturing process, it can meet the requirements of supercharged gasoline engines , without increasing the cost and weight of the whole machine

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