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US 4,359,865 AGranted
Exhaust system for multicylinder motorbike engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsYasuo Nakao, Nobuo Norimatsu
Life of this patent
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Abstract
An exhaust system for a multicylinder motorbike internal combustion engine. Each cylinder has a respective exhaust pipe. The pipes merge and discharge into a chamber, from which chamber a plurality of silencers, fewer in number than the cylinders, discharges exhaust gases to the atmosphere.
Claims6
An exhaust system for a multi-cylinder internal combustion engine for a motorbike, comprising:
- a plurality of exhaust pipes equal in number to the number of cylinders extending from respective ones of said cylinders;
- an exhaust chamber formed in a casing, said casing having an entry opening for each of said exhaust pipes, said exhaust pipes, in pairs, being convergently joined to form a gang pipe which continues the flow of each said pair of exhaust pipes and discharges into said exhaust chamber, said exhaust pipes and gang pipe having a substantial length inside said exhaust chamber;
- and a silencer in communication with said exhaust chamber to exhaust gases therefrom, there being a greater number of exhaust pipes than silencers.
Dependencies are inferred from the claim text.