EXHAUST DEVICE OF SADDLE TYPE VEHICLE

PROBLEM TO BE SOLVED: To reduce leakage of noise from a drain hole while securing a function of the drain hole even when a downstream-side opening end of an exhaust pipe is disposed in a first expansion chamber of the lowest position of a muffler, and the first expansion chamber and the drain hole are communicated with each other.SOLUTION: An exhaust device includes a muffler 80 and an exhaust pipe 70 connected to an internal combustion engine 2. In the exhaust device of a saddle type vehicle 1, the muffler has an outer case 82, 182 composed of a shell portion 81, 181 and a separator 84 defining a plurality of expansion chambers 83, a downstream-side opening end 72 of the exhaust pipe is disposed in the first expansion chamber 83A of the lowest position, and a drain hole 91, 191 is formed to communicate the first expansion chamber and the external of the muffler. The muffler includes cylindrical portion 85, 185 of a double cylinder structure provided with an inner case in an outer case, and a shielding portion 92, 197 for covering the drain hole is disposed in the first expansion chamber.SELECTED DRAWING: Figure 4 【課題】消音器の最も低い位置の第１膨張室内に排気管の下流側開放端が配設され、第１膨張室とドレン孔が連通されても、ドレン孔の機能を確保しつつ、ドレン孔からの音漏れを低減できる。【解決手段】消音器80と、内燃機関２に接続された排気管70とを備えた排気装置であって、消音器は、外殻部81,181となる外側ケース82,182と、複数の膨張室83を区画するセパレータ84を有し、最も低い位置の第１膨張室83Ａ内に排気管の下流側開放端72が配設され、第１膨張室と消音器の外部とを連通するドレン孔91,191が設けられた鞍乗型車両１の排気装置において、消音器は、外側ケースの内側に内側ケースが設けられた二重筒構造の筒状部85,185を備え、第１膨張室内に、ドレン孔を覆う遮蔽部92,197が設けられた。【選択図】図４