Patent ID: 9611777
Date: 2017-04-04
CPC Classifications: F01N,Y02A

Claim:
1. An exhaust device of a multi-cylinder engine that is arranged so that cylinder lines extend in a prescribed direction at a vehicle front part, and an exhaust line is arranged so as to extend rearward of the engine, comprising: in sequence from an upstream side of an exhaust gas flow, wherein the single exhaust pipe further comprises a first collecting part configured with a flow area that becomes smaller toward a downstream direction, a second collecting part provided downstream of the first collecting part and configured with a flow area that becomes larger toward the downstream direction, two or more bending parts provided downstream of the second collecting part, and a downstream part with a second longitudinal axis and provided downstream of the two or more bending parts, wherein the downstream part is connected to the catalyst device so that the first longitudinal axis is configured diagonally to the second longitudinal axis, and the exhaust gas is introduced into the catalyst device from a direction that is diagonally lateral to an inlet part of the catalyst device; wherein all independent exhaust pipes directly converge together at one inlet of the single exhaust pipe; and wherein all exhaust gas flows from the one inlet through the single exhaust pipe into the inlet part of the catalyst device in a flow pathway without any flow diversions between the one inlet and the inlet part of the catalyst device.