Exhaust system for V-type engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsMamoru Atsuumi, Yorio Futakuchi, Hiroyuki Kosugi
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Abstract
Two embodiments of motorcycles having improved exhaust systems. In each embodiment, the motorcycle includes a V-type engine and the exhaust system provides substantially equal length exhaust pipes that merge into a common exhaust outlet and which are disposed beneath the clutch and on the opposite side of the engine from the generator. In addition, one embodiment discloses an oil filter that is disposed above the clutch so as to be protected from the heat of the exhaust pipes by the clutch.
Claims28
An exhaust system for an engine having a crankcase and at least a pair of cylinders extending from said crankcase at an angle to each other, said cylinders being staggered transversely of said crankcase so that one of said cylinders is offset relative to the other of said cylinders, said cylinders having like facing exhaust ports, the improvement comprising a first exhaust pipe extending from the exhaust port of said offset cylinder downwardly and to one side of the other of said cylinders and passing at least in part under said crankcase, a second exhaust pipe extending from the exhaust port of the other of said cylinders and passing at least in part beneath said crankcase, and a common atmospheric exhaust gas discharge for said exhaust pipes.
An exhaust system for an engine having a crankcase containing a crankshaft and at least a pair of cylinders extending from said crankcase at an angle to each other, an accessory driven by said engine at one side thereof, said cylinders having like facing exhaust ports, the improvement comprising first and second exhaust pipes extending from the exhaust ports of said cylinders downwardly and to one side of the engine and passing at least in part beneath said crankcase and discharging to the atmosphere, said accessory being located at the opposite side of the engine from said exhaust ports.
An exhaust system for an engine having a crankcase containing a crankshaft, a clutch disposed at one side of said engine and driven by said crankshaft, a pair of cylinders extending from said crankcase at an angle to each other, said cylinders having like facing exhaust ports, the improvement comprising first and second exhaust pipes extending from the exhaust ports of said cylinder downwardly and beneath said crankcase and said clutch and discharging to the atmosphere.
Dependencies are inferred from the claim text.