Structure of exhaust pipe

Abstract

A structure of an exhaust pipe may include a first pipe discharging exhaust gas produced in engine cylinders disposed in a first side row, a second pipe discharging exhaust gas produced in engine cylinders disposed in a second side row, a merging pipe having a first end communicatively connected to the first pipe, and a second end communicatively connected to the second pipe, and a valve plate embedded in the merging pipe, and selectively closed or opened.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims priority to Korean Patent Application No. 10-2016-0045719, filed Apr. 14, 2016, the entire contents of which is incorporated herein for all purposes by this reference.BACKGROUND OF THE INVENTIONField of the Invention[0002]The present invention relates to a structure of an exhaust pipe for a vehicle which discharges exhaust gas, which is generated in an engine, rearward from a vehicle body, and more particularly, to a structure of an exhaust pipe, which is capable of maintaining noise reducing properties or generating rough exhaust sound, which emphasizes dynamism, in accordance with a driving situation or a driver's preference.Description of Related Art[0003]Engines may be classified into an inline 4-cylinder engine, an inline 6-cylinder engine, a V6 cylinder engine, and a V8 cylinder engine in accordance with the number of cylinders and an arrangement state of the cylinders, and may also be classified into ...

AI Technical Summary

Benefits of technology

The present invention provides an exhaust pipe structure that can reduce noise based on driving situation or a driver's preference to match their needs and to avoid the need for a separate reinforcing bracket. The various embodiments of the invention can create silent or dynamic exhaust sound that improves the vehicle's marketability.

Problems solved by technology

For reference, an analysis of frequencies of sound generated by the engine is carried out by analyzing a degree of order defined by one event per revolution of a crankshaft, a basic frequency of discharge sound of exhaust gas varies in accordance with a rotational speed and the order of the engine (if a typical frequency analysis method is used for a rotating body, a vibration frequency of which varies in accordance with a rotational speed of the engine, there is a problem in that the vibration frequency often varies in accordance with a rotational speed of the engine).

Therefore, there is a limitation in finding a cause of vibration and solving the problems only by using the frequency analysis method, and as a result, an order analysis method, which is a concept for non-dimensionalizing vibration components associated with a rotational speed by using an input rotational speed which is a cause of a change in frequency, is widely used in the art for a vibration system a vibration frequency of which varies as a rotational speed is often changed.

However, the aforementioned structure cannot appeal to consumers who prefer rough exhaust sound as described above, and there is a need for development of a structure of an exhaust pipe which may emphasize the half-order, that is, produce rough exhaust sound in accordance with a driving condition.

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