TH72677B - Devices that purify exhaust gases for engines - Google Patents

Abstract

DC60 (16/05/48) to provide an exhaust gas purification device for straddle vehicles that Unattractive appearance can be avoided when the secondary air intake is connected to the exhaust pipe.The exhaust gas purification device (20) includes an exhaust section (15) that is connected to the engine (4), The accelerator is positioned in the exhaust pipe (15), the secondary air intake (23) that is connected to the exhaust section (15) on the side leading up to the accelerator. And the silencer (30) for supporting the connected section (23a) where the exhaust pipe (15) is connected to the secondary air duct (23) and the exhaust section (15) at the point leading to the end. Way from the connected section (23a) to provide gas purification equipment for straddle vehicles that The unattractive appearance can be avoided when the secondary air duct is connected to the exhaust pipe. Pure exhaust gas (20) includes an exhaust pipe (15) connected to the engine (4), an accelerator positioned in the exhaust pipe (15), a secondary air intake (23). That is connected to the exhaust section (15) on the side leading up to the accelerator. And the silencer (30) for supporting the connected section (23a) where the exhaust pipe (15) is connected to the secondary air duct (23) and the exhaust section (15) at the point leading to the end. The way from the connected parts (23a)

Claims (4)

1. An exhaust gas purification device for a straddling vehicle, comprising an exhaust pipe connected to the engine, a catalyst positioned in the exhaust pipe, a secondary air pipe connected to the portion leading to the exhaust pipe from the catalyst, and a silencer supporting the portion of the exhaust pipe to which it is connected the secondary air pipe and to the portion leading to the exhaust pipe from the connected portion. 2. An exhaust gas purification device for a straddling vehicle as described in claim 1, wherein the secondary air pipe includes a first pipe portion and a second pipe portion connected to create a secondary airflow condition, wherein one end of the first pipe portion is connected to an exhaust pipe and the other end of the first pipe portion is connected to the end of the second pipe portion on the outside of the silencer. 3. An exhaust gas purification device for a straddle-type vehicle as described in claim 2, wherein the silencer has a hole through which the outer circumference of the first pipe portion is inserted, wherein the outer circumference of the first pipe portion is welded to the rim of the hole and the first pipe portion, and the first and second pipe portions are welded together on the outside of the silencer. 4. An exhaust gas purification device for a straddling vehicle, as described in any one of claims 1 to 3, wherein the muffler includes a hollow body forming the muffler side, and a cover assembly welded to an opening in the hollow body, and a secondary air intake pipe is inserted in the cover assembly.