Exhaust pipeline tone tuning valve and exhaust pipeline

Abstract

The invention discloses an exhaust pipeline tone tuning valve. The valve comprises a first fixed seat, a second fixed seat, a shaft rod, a valve piece and a reset adjusting device. The first fixed seat and the second fixed seat are fastened on the side wall of an exhaust pipe, and the shaft rod can be rotatably connected to the first fixed seat and the second fixed seat and penetrates the side wall of the exhaust pipe; the valve piece is arranged in the exhaust pipe and is fixedly connected to the shaft rod; the reset adjusting device is arranged on the outer portion of the exhaust pipe; one end of the reset adjusting device is connected to the shaft rod, and the other end of the reset adjusting device is connected to the exhaust pipe; and the reset adjusting device and the shaft rod are coaxially arranged. The invention further discloses an exhaust pipeline with the exhaust pipeline tone tuning valve. Through the exhaust pipeline tone tuning valve and the exhaust pipeline, under the low-rotating-speed stage of an engine, the small opening angle can be kept, and the good acoustic performance is kept; and the opening angle can be increased along with rising of the rotating speed of the engine or increasing of the exhaust flow, and the backpressure requirement of the engine is met.

Description

technical field [0001] The invention relates to the technical field of exhaust pipes, in particular to an exhaust pipe tuning valve and an exhaust pipe. Background technique [0002] At present, the power of automobile engines is continuously improved through new technologies, and the accompanying vibration and noise are also greater. However, car consumers have higher requirements for car NVH (Noise, Vibration, Harshness, noise, vibration and harshness), and reducing vibration and noise has become the focus and difficulty of car design. [0003] Existing exhaust noise is mainly controlled passively through the design of pipelines and mufflers. The design of the noise reduction volume of this technology is generally positively correlated with the displacement of the engine. When the engine displacement is large and the silencer volume of the muffler is limited, when the back pressure target is met, the expected acoustic target cannot be achieved. In order to meet the noise...

AI Technical Summary

Problems solved by technology

[0004] 1. It is difficult to ensure the acoustic target of the exhaust system when the noise reduction volume is limited by the space layout of ordinary passive noise reduction exhaust pipelines

Due to the limitation of space layout, in the process of vehicle layout, in the case of meeting the power loss requirements, it is likely that the noise requirements of the vehicle cannot be met due to the limited space.

[0005] 2. The elastic elements of the existing noise reduction structure are arranged inside the muffler and are directly exposed to the exhaust gas. The performance requirements of the elastic elements are relatively high, and the price and cost remain high.

[0006] 3. The layout space is limited, and it cannot be adjusted according to the actual use situation, which has a great impact on the back pressure

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