BACK PRESSURE REDUCING APPARATUS USING ORIFICE VENTURI PIPE

摘要

A back pressure decreasing device using an orifice venturi tube is provided to efficiency reduce the back pressure by inhaling the exhaust gas with a compulsive inhaling decompression part and discharging the exhaust gas with a compulsive exhaling decompression part. A back pressure decreasing device using an orifice venturi tube(100) comprises an exhaust pipe(10) having a plurality of decompressing hole(10a), mounted at the backend of an exhaust gas finishing device of vehicles. The orifice venturi tube inhales the exhaust gas and discharges back at the circumference of the decompressing hole. The orifice venturi tube includes: a compulsive intake decompression part(110) inhaling the exhaust gas of an exhaust pipe inside is by force and reducing the back pressure with the air flowing from outside; and a compulsive exhaust decompression part(120) pushing the air flowing from outside to the inside of the exhaust pipe and discharging the exhaust gas to the exhaust pipe back.