Noise reduction device and method for automobile exhausting system

Abstract

The invention discloses a noise reduction device for an automobile exhausting system. The noise reduction device comprises a noise reducer, a noise reduction controller and a microphone for acquiringnoise, wherein the microphone is arranged at the exhausting end of an exhausting pipeline and is connected with the noise reduction controller, and the noise reducer is connected with the noise reduction controller. The noise reducer is arranged between a three-way catalyst and a silencer, the air inlet end of the noise reducer is connected with the exhausting end of the three-way catalyst, the exhausting end of the noise reducer is connected with the air inlet end of the silencer, and the microphone is arranged at the exhausting end of the silencer. The noise reducer is a cooler, the cooler is communicated with a cooling system of an engine, the cooler is provided with a flow valve, and the flow valve is connected with the noise reduction controller and controls the flow of coolant entering the cooler. The coolant led into the cooler is cool the gas in the exhausting pipeline, accordingly the noise is reduced, the cooler is communicated with the cooling system of a whole automobile, and circulation of the coolant is achieved. The invention also discloses a noise reduction method for the automobile exhausting system.

Description

technical field [0001] The invention belongs to the technical field of automobile performance optimization, and in particular relates to a noise reduction device and a noise reduction method for an automobile exhaust system. Background technique [0002] With the continuous increase of car ownership in China and even the world, noise pollution is becoming more and more serious. Due to the characteristics of the car engine when it is working, the gas discharged during work will produce gas flow noise, and the noise will affect people's study, work and rest. , Noise Harm Noise has an impact on human beings in all aspects of physiology, psychology and society. Even low noise levels can interfere with people's normal activities. Damage to the auditory organs. The impact of noise on hearing is related to its sound pressure level, frequency and action time. Therefore, in order to reduce the airflow noise generated by the engine gas when the car is running, a key component is us...

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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a noise reduction device for the automobile exhaust system that effectively reduces the noise of the automobile exhaust system and optimizes the performance of the exhaust system, in order to solve the problems caused by the exhaust system of the automobile. The restrictive factors of the layout space and the back pressure performance requirements of the automobile exhaust system, when the design of the combination of pipes and chambers in the automobile exhaust noise reaches a certain level, it is difficult to further reduce the noise

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