| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust valve device that can contribute to miniaturization and weight saving of an engine.SOLUTION: An exhaust valve device 20 is interposed between an engine body 1 and a turbo-supercharger 50. The exhaust valve device 20 comprises: a device body 21 on which high-speed passages 24b, 25b, 26b and an EGR intermediate passage 28 are formed and that is made of a metallic casting body; and an exhaust variable valve including valve bodies 30 respectively arranged in the high-speed passages 24b, 25b, 26b and an operation shaft 36 coupled with the valve bodies 30. The respective high-speed passages 24b, 25b, 26b and the EGR intermediate passage 28 are formed on the device body 21 serially and in line in a specific direction so that the EGR intermediate passage 28 is positioned at an end. The operation shaft 36 is supported by the device body 21 to penetrate through the respective high-speed passages 24b, 25b, 26b and the EGR intermediate passage 28 in a direction parallel to the specific direction. |
