Exhaust sound quality adjustment device and matching method

Abstract

The invention discloses an exhaust sound quality adjusting device. The exhaust sound quality adjusting device is arranged in an exhaust system of an automobile engine. The exhaust system comprises an exhaust manifold, a three-way catalyst connected to the exhaust manifold, a silencer connected to the three-way catalyst and a tail pipe connected to the silencer, wherein the exhaust manifold, the three-way catalyst, the silencer and the tail pipe are successively connected, and the exhaust manifold is connected to the automobile engine; the exhaust sound quality adjusting device comprises an exhaust sound producing drum connected between the three-way catalyst and the silencer through a valve for adjusting the sound quality of exhaust noise and a first guide pipe connected to the exhaust sound producing drum, wherein the first guide pipe at least communicates with the tail pipe. By arranging the exhaust sound quality adjusting device, characteristic sound quality of the exhaust noise of the mobile engine can be adjusted, and when the characteristic sound quality is adjusted, an exhaust air flow signal is directly fed back to adjust the sound quality for the exhaust sound quality without other power sources and signal feedback devices by taking an exhaust air flow as a power input source, so that the exhaust sound quality adjusting device has a relatively good cost advantage.

Description

technical field [0001] The invention relates to the field of acoustic technology, in particular to an exhaust sound quality adjustment device and a matching method. Background technique [0002] As we all know, the main noise of a car comes from the engine, and the main noise of the engine is the exhaust noise, which is often about 10-15dB(A) higher than other engine noises. It can be seen that an important factor for reducing car noise and improving car sound quality The way is how to control the emission of exhaust noise. At the same time, the exhaust system is an important component of the internal combustion engine of modern power vehicles. Its performance not only determines the emission of pollutants and aerodynamic noise, but also has a great impact on the pressure loss of the engine. Therefore, how to effectively design the exhaust system, Matching it reasonably with the engine has become one of the key technologies for energy saving and purification of modern autom...

AI Technical Summary

Problems solved by technology

[0003] from figure 1 It can be seen that the traditional exhaust matching development is mainly based on customer requirements to control the total sound pressure level noise and order noise of idling and acceleration, so that there should be no obvious abnormal noise and no obvious impact on the noise inside the car

Seldom consider the quality of the vehicle and exhaust sound

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