A magnetically controlled acoustic valve
A magnetic control and acoustic technology, applied in the direction of mufflers, engine components, machines/engines, etc., can solve the problems of wasting engine power, increasing the back pressure of the exhaust system, increasing fuel consumption, etc.
Active Publication Date: 2016-08-10
JIANGSU UNIV
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Problems solved by technology
[0002] One of the main functions of the automobile exhaust system is to solve the noise problem of the automobile engine, especially the low-frequency noise problem at low speed. The application of the acoustic valve can well solve the low-frequency noise problem at low speed, but the traditional spring control valve, At high speed, the reaction force to the exhaust system will also increase, and the back pressure of the exhaust system will increase, which wastes the power of the engine and increases fuel consumption; therefore, a new device is needed to solve the noise problem at low speed and at the same time Can also be used without increasing back pressure at high RPM
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[0017] see figure 1 The magneto-acoustic valve device for tailpipe noise control of the exhaust system of the present invention comprises an exhaust pipe 1, a valve plate 2, a rotating shaft 3, a steel wool bushing 4, a magnet 5, and a magnet protection cover 6; Holes are opened on the side, the steel wool bushings are respectively fixed in the holes, the rotating shaft is fixed in the steel wool bushings, the valve plate is welded on the rotating shaft, and the magnet is welded directly below the valve plate through the magnet protection cover.
[0018] The working principle of the present invention combines figure 1 described as follows:
[0019] The restoring force required by the valve plate is provided by the magnetic force of the magnet 5 and the gravity of the valve plate 2 itself to replace the function of the spring. At low speed, the torque and power required by the car are relatively low, and the back pressure requirement is relatively low, but The requirements fo...
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The invention relates to a noise reduction device, in particular to a magnetic control acoustics valve. The magnetic control acoustics valve comprises a valve block, a rotating shaft, a steel wool lining, an exhaust pipe, a magnet and a magnet protection cover, wherein automobile exhaust waste gas enters from the inlet of the exhaust pipe; magnetic force to the valve block by the magnet and the self weight of the valve block are overcome, and the valve block is blown to open; when the revolving speed of an engine is increased, the exhaust flow rate is increased, and the opening degree of the valve block is bigger; meanwhile, because the distance between the valve block and the magnet is bigger and bigger, the magnetic force is smaller; correspondingly, the counter-acting force of exhaust is lowered; therefore, exhaust back pressure is lowered. Compared with the traditional acoustics passive valve, the magnetic control acoustics valve has the characteristics of simple structure, easiness in manufacture and installation, low cost and low back pressure during high revolving speed, and low-frequency noise can be controlled.
Description
technical field [0001] The invention relates to a noise reduction device, in particular to a magnetically controlled acoustic valve. Background technique [0002] One of the main functions of the automobile exhaust system is to solve the noise problem of the automobile engine, especially the low-frequency noise problem at low speed. The application of the acoustic valve can well solve the low-frequency noise problem at low speed, but the traditional spring control valve, At high speed, the reaction force to the exhaust system will also increase, and the back pressure of the exhaust system will increase, which wastes the power of the engine and increases fuel consumption; therefore, a new device is needed to solve the noise problem at low speed and at the same time It is also possible not to increase the back pressure at high rotational speeds. Contents of the invention [0003] The object of the present invention is to provide a magneto-acoustic valve device for tailpipe ...
Claims
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IPC IPC(8): F01N1/20
Inventor 汪若尘朱静叶青谢健
Owner JIANGSU UNIV