JPS6233950Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of an exhaust pipe collecting device for an engine used in a motorcycle or the like.

Large motorcycles sometimes use four-cylinder engines, in which case the four exhaust pipes connected to the exhaust holes of each cylinder are combined into one place.
May be connected to one muffler. In that case,
Generally, as shown in FIGS. 1 to 3, a connecting piece 2 is provided at the front end of a muffler 1. The connecting piece 2 has a cylindrical outer shape as shown in FIG. 2, or a square cylindrical shape as shown in FIG. 3, and the four pipe holes 3 are arranged in a square shape. The tail ends of the four exhaust pipes 5 of the engine 4 are inserted into and connected to the four pipe holes 3, respectively. However, since the exhaust pipe 5 of a motorcycle is usually arranged so as to pass under the engine 4,
The connecting piece 2 is large and protrudes downward, reducing the distance from the ground, especially in places with poor road surfaces.
I feel unwell because I sometimes touch the ground while driving.

This idea is an improvement based on these points.
The embodiment of the present invention shown in FIG. 4 will be described below.

A substantially diamond-shaped columnar connecting piece 2 is provided at the front end of the muffler 1. The connecting piece 2 has four pipe holes 3, upper and lower 2.
Four pipe holes 3 are arranged and provided in a diamond shape, with the two lower ones being diagonally phased with respect to the first pipe hole. Then, the tail ends of the four exhaust pipes 5 of the engine 4 are inserted into the four pipe holes 3 and connected.

By attaching the connecting piece 2 at the front end of the muffler 1 to the vehicle body with one substantially diamond-shaped surface aligned horizontally or matching the bank angle of the vehicle body, the four pipe holes 3 can be aligned in phase with each other. As much as possible, the vertical dimensions can be reduced and the distance from the ground can be increased. This prevents the connecting piece 2 from coming into contact with the ground even on rough roads or when the vehicle body is heavily banked, thereby improving safety.

As explained above, this idea is to provide a substantially diamond-shaped connecting piece with four pipe holes arranged in a diamond shape at the front end of the muffler, and insert the four exhaust pipes of the engine into the four pipe holes of the connecting piece. Since they are connected, the vertical dimension of the connecting piece can be reduced by the amount of the four pipe holes located in a diamond shape. Then, the distance from the ground can be increased by that much, and there is no danger of the vehicle touching the ground on rough roads or when the vehicle is banked, improving safety.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view showing a conventional example, Fig. 2 is an enlarged cross-sectional view of the part indicated by arrow A in Fig. 1, Fig. 3 is a view equivalent to Fig. 2 showing another conventional example, and Fig. 4 is an enlarged cross-sectional view of the part indicated by arrow A in Fig. 1. FIG. 2 is an enlarged cross-sectional view corresponding to the section indicated by the arrow A in FIG. 1, showing an embodiment of the present invention. 1...Muffler, 2...Connecting piece, 3...Pipe hole, 4...Engine, 5...Exhaust pipe.

Claims (1)

[Scope of utility model registration request] A substantially diamond-shaped connecting piece with four pipe holes arranged in a diamond shape is provided at the front end of the muffler, and the four exhaust pipes of the engine are inserted into the four pipe holes of the connecting piece to connect them. Engine exhaust pipe collection device.