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.

What is claimed is: 
     
         1 . A structure of an exhaust pipe, the structure comprising:
 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.   
     
     
         2 . The structure of  claim 1 , wherein the valve plate has a circular plate shape, and is configured to be opened or closed based on a rotation angle at which a rotating shaft is rotated. 
     
     
         3 . The structure of  claim 2 , further comprising an actuator which rotates the valve plate when electric power is applied to the actuator. 
     
     
         4 . The structure of  claim 3 , wherein the actuator opens or closes the valve plate based on driving information of the vehicle and predetermined logic, and rotates the valve plate to open or close the valve plate. 
     
     
         5 . The structure of  claim 4 , wherein the actuator opens the valve plate under a condition in which the engine operates at a range of 750 rpm to 3,000 rpm, and an engine load is 50% or below. 
     
     
         6 . The structure of  claim 1 , wherein the first pipe and the second pipe form sections in which the first pipe and the second pipe are parallel to each other at a front side of a muffler, and the merging pipe is disposed in the section in which the first pipe and the second pipe are parallel to each other. 
     
     
         7 . The structure of  claim 6 , wherein pipe joints are mounted at both ends of the merging pipe, respectively, to be fitted in the section in which the first pipe and the second pipe are parallel to each other.