Noise reduction device for automobile engine

Abstract

The invention discloses an automobile engine noise reduction device. The automobile engine noise reduction device comprises a noise reduction shell, a gas inlet pipe and a gas outlet pipe, the left side end of the noise reduction shell is connected to the gas inlet pipe in a communicating mode, and the right side end of the noise reduction shell is connected to the gas outlet pipe in a communicating mode, and the noise reduction shell comprises a shell body, a soundproof layer, a sound absorbing layer, a temperature insulation layer, a high temperature resistance layer; and a first buffer plate and a second buffer plate are arranged in an inner cavity of the noise reduction shell, a plurality of first through holes are evenly formed in the edge of the first buffer plate, a first seal sleeve is arranged on the outer circular face of the first buffer plate in a sleeving mode, a gas leading pipe matched with the gas inlet pipe is arranged in the middle of the left side end of the first buffer plate, a plurality of communicating holes are evenly formed in the right side of the outer circular face of the gas leading pipe, and a first spring is arranged on the outer circular face of thegas leading pipe in a sleeving mode. According to the automobile engine noise reduction device, the flow velocity of the exhaust gas is reduced by arranging the first buffer plate and the second buffer plate, and the collision noise between the exhaust gas and the noise reduction shell as well as between the exhaust gas and the first buffer plate and the second buffer plate is greatly reduced by being combined with the first spring and a second spring for the energy storage.

Description

technical field [0001] The invention relates to the technical field of engine noise reduction, in particular to an automobile engine noise reduction device. Background technique [0002] Automobiles, driven by power, non-track-bearing vehicles with 4 or more wheels, are mainly used for: carrying people and (or) goods; towing vehicles that carry people and (or) goods; special purposes. [0003] Sedan refers to a car used to carry people and their belongings, and the seats are arranged between the two axles. Including the driver, the number of seats does not exceed nine. [0004] The general car emphasizes comfort and takes the occupant as the center. Moreover, starting from economic considerations, an engine with moderate horsepower, small displacement, and low fuel consumption is selected. In terms of driving license management in mainland China, cars refer to small cars that are different from trucks, pickups, SUVs, buses, and minibuses, commonly known as "small cars." ...

AI Technical Summary

Problems solved by technology

[0009] The material used in the existing muffler is usually a steel structure. The muffler is formed into the required shape by steel welding, and the muffler cylinder is fixed in the steel cylinder. The muffler of this type of structure is heavy and the production cost is relatively high. It is difficult to meet the current production demand

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