Exhaust control valve

An exhaust control valve comprising:

• a valve housing having a valve chamber, said valve housing being provided with pairs of inlet ports and outlet ports opening to each end face of front and rear flanges of said valve housing;
• a valve body having a cylindrical shape with respect to an axial direction of said valve body, rotatably contained in the valve chamber and cooperatively engaged with said valve housing for controlling a flow of exhaust gas;
• a transmission member rotationally driving at least one valve shaft of said valve body;
• a plurality of bearing bushings mounted in said valve housing and rotatably supporting each valve shaft, said valve body and an axial centerline of each of the valve shafts being coaxially arranged along a common axis;
• and
• a bearing bracket having a spring load from a thrust spring, said spring load maintaining a pressure seal, direct contact condition between an end face of the valve body and an end face of each bearing bushing,
• wherein said valve body and each of the valve shafts have a uniform construction with a one-piece, unitary cast body.

An exhaust control system for an internal combustion engine of a vehicle comprising:

• a plurality of exhaust pipes from the internal combustion engine containing an exhaust gas flow, said exhaust pipes each having an intermediate portion;
• a common valve housing interposed in the intermediate portions of said exhaust pipes, the valve housing having at least one pair of inlet ports, at least one pair of outlet ports, and a valve chamber, said common valve housing having an axial direction orthogonal to an axial direction of said exhaust pipes;
• a valve body having a cylindrical shape with respect to an axial direction of said valve body, rotatably mounted within the valve chamber, and cooperatively engaged with said valve housing for controlling a flow of exhaust gas;
• a transmission member rotationally driving a pair of valve shafts of said valve body;
• and
• a plurality of bearing bushings mounted in said valve housing and rotatably supporting each valve shaft, said valve body an axial centerline of each of the valve shafts being coaxially arranged along a common axis,
• wherein said valve body and each of the valve shafts have a uniform construction with a one-piece, unitary cast body.

An exhaust control system for an internal combustion engine of a vehicle comprising:

• a plurality of exhaust pipes from the internal combustion engine containing an exhaust gas flow, said exhaust pipes each having an intermediate portion;
• a common valve housing interposed in the intermediate portions of said exhaust pipes, the valve housing having at least one pair of inlet ports, at least one pair of outlet ports, and a valve chamber, said common valve housing having an axial direction orthogonal to an axial direction of said exhaust pipes, and said valve chamber being mounted in an upper portion of the common valve housing so as to be interposed in the intermediate portions of said exhaust pipes having uppermost positions;
• a valve body having a cylindrical shape with respect to an axial direction of said valve body, rotatably mounted within the valve chamber, and cooperatively engaged with said valve housing for controlling a flow of exhaust gas;
• a transmission member rotationally driving at least one valve shaft of said valve body;
• a plurality of bearing bushings mounted in said valve housing and rotatably supporting each valve shaft, said valve body and an axial centerline of each of the valve shafts being coaxially arranged along a common axis, the axial centerline of each of the valve shafts being arranged substantially perpendicular to the axial direction of the exhaust pipes;
• and
• a bearing bracket having a spring load from a thrust spring, said spring load maintaining a pressure seal, direct contact condition between an end face of the valve body and an end face of each bearing bushing.