Patent ID: 8915775

Claim:
An exhaust system comprising: an exhaust pressure controller interposed in an exhaust passage and including: a pipe body including a side peripheral wall in which at least one port is formed; said at least one port having a discrete orifice introducing a gas; and a gas introduction wall for introducing an exhaust gas flowing from an upstream side of the pipe body so that the exhaust gas flows downstream without coming into direct contact with the port and vicinity thereof, one face of the gas introduction wall forming a pressure control path together with an inner face of the side peripheral wall while another face of the gas introduction wall forming an exhaust gas path along which the exhaust gas flows, the gas introduction wall being shorter in length than the pipe body, wherein the length is in a longitudinal axis of the pipe body, wherein the port communicates with the pressure control path, and the pressure control path communicates with the exhaust gas path at part downstream of the port; an exhaust trap for causing a reacted gas in the exhaust gas to coagulate and catching coagulated reacted gas, wherein the exhaust trap includes: a coagulation pipe interposed in the exhaust passage; a pair of first adhesion plates opposed to each other in the coagulation pipe with a vertical section including an axial center of the coagulation pipe interposed, a first path being formed between the pair of first adhesion plates; a band-shaped second adhesion plate formed downstream of the first path in the coagulation pipe so as to correspond to the first path as viewed in a direction of the axial center thereof and so as to bridge an inner face of the coagulation pipe, a pair of second paths being formed between the second adhesion plate and the inner face of the coagulation pipe so as to be opposed to each other with the vertical section interposed; and a plurality of fins standing on upper faces of the pair of first adhesion plates and an upper face of the second adhesion plate; wherein adjacent fins standing on the upper faces of the first adhesion plates are different in height from each other.