JPS6341534Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an exhaust pipe cover for a motorcycle engine.

In a motorcycle engine, the engine exhaust port and muffler are connected by an exhaust pipe. Exhaust pipes are usually made of steel pipes and appear exposed, so the surface should be finished with chrome plating etc. to give it a nice appearance. However, high-temperature exhaust gas passes through the exhaust pipe, and this heat causes the plating surface to discolor and become unsightly. For this reason, a gutter-shaped exhaust pipe cover is used to closely cover the exhaust pipe so that the discolored portion is not visible. Further, recently, research has been progressing to purify exhaust gas by providing a catalyst body or the like at the rear end of the exhaust pipe. In this case, in order to prevent the temperature of the exhaust gas from dropping while passing through the exhaust pipe and to prevent the purification effect of the catalyst from decreasing, a gutter-shaped exhaust pipe cover should be placed close to the exhaust pipe and the exhaust pipe should be covered with a gutter-like cover. When the exhaust pipe cover is placed close to the exhaust pipe cover, the exhaust pipe cover is generally attached to the exhaust pipe with a wrap band or the like. Therefore, the heat of the exhaust pipe is conducted to the exhaust pipe cover through the winding band of the mounting portion, etc., and the effect of preventing a drop in the temperature of the exhaust pipe is small. Also, the exhaust pipe cover becomes hot and there is a risk of burns if you hit it.

This idea is an improvement based on these points.
Embodiments of the present invention shown in the drawings will be described below.

The figure shows the case of a four-cylinder engine, and an exhaust pipe cover 2 having a gutter-like cross section is provided for four cylinders so as to cover the exhaust pipe 1 closely from the front. The exhaust pipe covers 2 are welded and connected to each other by connecting pieces 3 in accordance with the positions of the exhaust pipes 1. Also, exhaust pipe cover 2
The holding piece 4 is welded in a protruding manner. Each exhaust pipe cover 2 is placed over the exhaust pipe 1 from the front side so as to be close to each exhaust pipe 1 with a small gap, and the holding piece 4 is fastened to the frame 5 using screws or the like. still,
The exhaust pipe 1 has a front end connected to an exhaust hole 7 of an engine 6 and a rear end connected to a muffler 8. A catalyst body is inserted into the large diameter portion 9 near the rear end of the exhaust pipe 1.

Therefore, each exhaust pipe cover 2 mainly covers the front side of each exhaust pipe 1 with a gap provided,
It is possible to prevent each exhaust pipe 1 from being cooled by the running wind. Furthermore, since the exhaust pipe covers 2 are connected to each other by connecting pieces 3 and fastened to the frame 5 by holding pieces 4, each exhaust pipe cover 2 is not in contact with each exhaust pipe 1 at all. . Therefore, the heat of the exhaust pipe 1 is not transferred to the exhaust pipe cover 2 through the contact material, and a drop in the temperature of the exhaust pipe 1 can be prevented. In this way, the exhaust pipe 1 can allow the exhaust gas to flow while maintaining its high temperature, and can improve reaction purification in the catalyst body. In each exhaust pipe cover 2, the heat conduction from the exhaust pipe 1 is only radiant heat, and the temperature rise is also small, so safety is improved.

As explained above, this invention connects a plurality of exhaust pipe covers formed in the shape of a gutter with a connecting piece, provides a protruding holding piece, arranges the exhaust pipe cover close to each exhaust pipe, Since the holding piece is attached by tightening it to the frame, it is possible to prevent wind from hitting the exhaust pipe from driving, and the exhaust pipe cover has no contact part with the exhaust pipe, so heat is absorbed through the contact part. There is no conduction. Therefore, the temperature of the exhaust gas can be effectively prevented from decreasing, and the purification efficiency of the catalyst can be improved. In addition, the exhaust pipe cover has less temperature rise, which improves safety.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, with FIG. 1 being a side view and FIG. 2 being a perspective view. 1... Exhaust pipe, 2... Exhaust pipe cover, 3... Connecting piece, 4... Holding piece, 5... Frame.

Claims (1)

[Scope of utility model registration request] A plurality of exhaust pipe covers formed in the shape of a gutter are connected by a connecting piece, a holding piece is provided in a protruding manner, the exhaust pipe cover is placed close to each exhaust pipe, and the holding piece is fastened to the frame. An exhaust pipe cover for a motorcycle engine, characterized in that the exhaust pipe cover is adapted to be attached.