Exhaster of motor bicycle

Abstract

The invention is to burn exhaust gas passing through an exhaust pipe temporarily and containing an unburned component by bringing it into contact with a wire netting having a high temperature in an exhaust gas reaction chamber after abrupt deceleration and prevent the combustion of exhaust gas in the exhaust pipe or a muffler on the downstream side to prevent the noise generated in an exhaust system. The exhaust gas reaction chamber 61 consisting of a bent pipe 52 opening a plurality of communicating holes 58 passing through a cylindrical wall, the wire netting 55 put on outer periphery of the bent pipe 52 to cover the communicating holes 58, and an outer cylinder 51 put on the bent pipe 52 by keeping a predetermined interval C from an outer face of the bent pipe 52 is provided on the halfway of the exhaust pipe 43.

Description

technical field [0001] The present invention relates to an exhaust device for a motorcycle suitable for preventing abnormal combustion in a muffler and reducing manufacturing costs. Background technique [0002] As an exhaust device for a motorcycle, for example, Japanese Patent Application Laid-Open No. 8-303236 "Exhaust Gas Purification Device for Internal Combustion Engine" is known. [0003] In FIG. 3 of the above-mentioned publication, an exhaust device 5 is described. The second exhaust pipe 12 is connected to the end of the first exhaust pipe 11 connected to the engine, and the end of the second exhaust pipe 12 is The third exhaust pipe 13 extending to the side of the muffler is connected to the third exhaust pipe 13, and the second exhaust pipe 12 is made of a perforated plate, and an inner pipe 14 with a precious metal attached to the wall surface is arranged. [0004] For example, when the vehicle decelerates rapidly, the air-fuel mixture immediately after the rap...

AI Technical Summary

Problems solved by technology

This unburned component (unburned gas) may cause abnormal combustion in the muffler, resulting in noise

[0005] In the technology of the above-mentioned publication, for example, when exhaust gas containing a large amount of unburned components flows into the exhaust device, specific components to be purified can be removed from the unburned components, but it is difficult to suppress abnormal combustion.

[0006] In addition, the inner pipe 4 is expensive because precious metals are attached, which increases the manufacturing cost of the exhaust device 5.

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