Patent ID: 9617902
Date: 2017-04-11
CPC Classifications: F01N

Claim:
1. An exhaust device, for a multi-cylinder engine, comprising: a plurality of exhaust pipes disposed such that downstream end portions thereof are aligned in a lateral direction perpendicular to an axial direction thereof; and a collecting pipe connected to the downstream end portions of the exhaust pipes, wherein: the downstream end portions of the exhaust pipes have insertion sections that are inserted into an upstream end portion of the collecting pipe, the upstream end portion of the collecting pipe has a cover section that covers the entirety of circumferences of the insertion sections; outer circumferential surfaces of the insertion sections of the exhaust pipes and an inner circumferential surface of the cover section of the collecting pipe are joined over the entirety of circumferences thereof at a collecting pipe joining region, the collecting pipe joining region has a displacement portion having its position shifted in the axial direction toward the lateral direction relative to the remaining portion thereof, and the displacement portion is formed as a recess that is recessed toward the downstream side in the axial direction.