| 摘要 |
<p>The invention concerns a mounting arrangement of a throttle valve in an exhaust pipe (1) of an internal combustion engine, of the type wherein the exhaust pipe (1), or a portion thereof, has on the peripheral surface a pair of diametrically opposite perforations (2), in correspondence of which two respective pivoting bushes (3) of a throttle valve support shaft are mounted. According to the invention, each of said perforation (2) has a lip-shaped edge, forming a support collar (4), wherein a respective metal, pivoting bush (3) is mounted and then fastened by welding. The welding of each bush (3) is performed in correspondence of the furthermost edge (4a) of said collar (4) from the surface of the exhaust pipe (1). The invention concerns also a relative mounting procedure, wherein firstly the cutting of said perforations (2) is carried out, each preferably of an elliptical shape with the major axis parallel to the pipe axis.</p> |
