Exhaust gas purifying device for internal combustion engine

摘要

An exhaust gas purifying device for an internal combustion engine includes an inflow case provided with an inlet pipe, a catalyst case in which an oxidizing catalyst for dosing is housed, a filter case in which a soot filter is housed, and an outflow case provided with an outlet pipe, and is attached to an attached target at two attachment points mutually spaced in the axial direction of the cases. At one of the two attachment points, which is defined on the catalyst case, the catalyst case is firmly fixed. At the other attachment point, which is defined on the filter case, the filter case is attached slidably in the axial direction.

主权项

1. An exhaust gas purifying device for an internal combustion engine, comprising:
a soot filter that captures particulate matter in an exhaust gas; and a cylindrical case in which the soot filter is housed, wherein
the case is attached to an attached target at first and second attachment points that are spaced from each other in an axial direction of the case,the case is fixed to be restricted from sliding in the axial direction at the first attachment point while being attached slidably in the axial direction at the second attachment point,the first attachment point is located upstream of the soot filter,the second attachment point is located downstream of the soot filter,a flange provided on an outer circumference of the case is attached to the attached target via an attachment plate at the first attachment point,reinforcing plates are attached to first and second sides of the flange to be mutually opposed with the flange being interposed therebetween, one of the reinforcing plates being attached to the first side near a top of the first side, the attachment plate being attached to the first side near a bottom of the first side relative to the one of the reinforcing plates, three of the reinforcing plates being attached to the second side of the flange along an entire circumference of the flange,the attachment plate is attached to the attached target via an attachment bracket at the first attachment point, the attachment bracket comprising:
a bottom plate, anda pair of support plates arranged side by side along a line across a top surface of the bottom plate and fixed to the attachment plate, the pair of support plates having respective facing portions that are opposed to each other and curved down onto the bottom plate,the attachment bracket is attached to the attached target via a base plate, anda thin plate-like sheet member is interposed between the bottom plate of the attachment bracket and the base plate.