EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To enhance silence by reducing noise generated when exhaust air having passed through a detection section of an exhaust sensor collides with a wall surface in an exhaust passage.

SOLUTION: An exhaust apparatus for an internal combustion engine includes: an exhaust manifold 22 formed by gathering exhaust ports 21a-21f extending from a plurality of cylinders of an internal combustion engine 1 to gather exhaust gases discharged from the plurality of cylinders; a cone part 23 which is connected to the exhaust manifold 22 and bent to change the direction in the middle with respect to the direction of exhaustion from the cylinders for circulating exhaust gas from the exhaust manifold 22 to the downstream side; an LAF sensor 26 which is disposed on the outer wall surface in the cone part 23 distant from the exhaust manifold 22 and includes a detection section 26a projecting inside the cone part 23 for detecting the component of exhaust gas; and a rib 23c which is disposed downstream of the outer wall surface where the LAF sensor 26 is disposed in the cone part 23, and extends onto the outer wall surface in a direction perpendicular to an exhaust flow direction.

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