Patent ID: 9273589
Filing Date: 2016-03-01
CPC Classification: F01N

Claim Text:
1. An exhaust apparatus for an internal combustion engine, the exhaust apparatus comprising: a first exhaust collecting section including first exhaust ports extending from a plurality of first cylinders in the internal combustion engine, the first exhaust ports being combined to collect exhaust gas ejected from the plurality of first cylinders; a first exhaust passage through which the exhaust gas from the exhaust collecting section is to flow, the first exhaust passage being connected to the first exhaust collecting section and having a curved shape to change a flow direction of the exhaust gas from a direction in which the exhaust gas is ejected from each of the first cylinders, the first exhaust passage including an outer wall provided on a radially outer side of the curved shape; a first exhaust sensor disposed on the outer wall of the first exhaust passage and including a first detector configured to detect a constituent of the exhaust gas, the first detector protruding from the outer wall of the first exhaust passage into an inside of the first exhaust passage; and a rib protruding outward from the outer wall of the first exhaust passage, the rib being positioned downstream from the first exhaust sensor, wherein the rib extends a first distance along the outer wall in a direction perpendicular to a direction in which the exhaust gas is to flow, the rib extends a second distance along the outer wall in the direction in which the exhaust gas is to flow, and the first distance is greater than the second distance.