Patent ID: 6247305
Filing Date: 2001-06-19
Classification: F02B,Y02T,Y10T

Abstract:
An exhaust system for a Honda Gold Wing.RTM. motorcycle with a horizontally opposed six-cylinder engine with a displacement of 1520 cc, wherein the exhaust system increases the engine's performance and incorporates the OEM shroud covering the OEM exhaust manifold, said system comprising:a plurality of exhaust ports, each in communication with a cylinder of the engine to discharge a pulse of exhaust gas;a plurality of primary exhaust pipes, each having an inlet end and an outlet end, wherein the inlet end is connected to one of the exhaust ports to scavenge the pulse of exhaust gas;two collector chambers, each connected to and in flow communication with at least one outlet end of the plurality of primary exhaust pipes, wherein the two collector chambers alternate in their collection of subsequent discharges of the pulse of exhaust gas from the engine;two s-tube pipes, each connected to and in flow communication with one of the collector chambers and formed from a pair of approximately 180 degree elbow pipes attached at one of their ends in the shape of a non-coplanar s-tube, and wherein the two s-tube pipes cross each other;a gas accelerator chamber connected to and in flow communication with both of the s-tube pipes, wherein the gas accelerator chamber has two exhaust inlets and two exhaust outlets, wherein each exhaust inlet is aligned to direct the pulse of exhaust gas onto a flow splitter which is in the gas accelerator chamber, wherein the flow splitter is located obliquely to the flow direction of the pulse of exhaust gas to divide the pulse of exhaust gas between the two exhaust outlets, wherein the two exhaust outlets direct the distributed pulse of exhaust gas away from the flow splitter forming a low-pressure zone in the wake of the pulse of exhaust gas, and wherein the low-pressure zone preferentially travels back up the exhaust system to scavenge the subsequent pulse of exhaust gas;two secondary exhaust pipes, each having an upstream end and a downstream end, wherein each upstream end is connected to and in flow communication with one of the two exhaust outlets;two exhaust mufflers, each connected to and in flow communication with one of the downstream ends of the two secondary exhaust pipes, wherein the pulse of exhaust gas is expelled through both mufflers to the atmosphere; andwherein the inside diameter of the s-tube pipes is equal to or greater than the inside diameter of the plurality of primary exhaust pipes but less than or equal to the inside diameter of the two secondary exhaust pipes.