Patent ID: 8394332

Claim:
An exhaust gas purification apparatus, comprising: a first cylindrical housing in which at least a filter for collecting particulate matter in exhaust gas is contained; a second cylindrical housing in which at least a reducing catalytic converter for reduction-purifying nitrogen oxide with liquid reducing agent is contained; a communicating pipe, including a straight portion, connecting opposite end portions of each housing; and a nozzle, attached to the communicating pipe, to inject liquid reducing agent into the straight portion, wherein the first and second cylindrical housings are closely disposed such that axis lines thereof are arranged substantially parallel to each other, wherein the communicating pipe is disposed such that an axis line thereof is arranged substantially parallel with the axis lines of the housings, thereby folding a flow passage of the exhaust gas from the first housing to the second housing, and wherein the straight portion of the communicating pipe is located between the two cylindrical housings and disposed such that a projection of the straight portion of the communicating pipe overlaps a projection of the two cylindrical housings as viewed from a direction perpendicular to a plane including the axis lines of the two cylindrical housings.