Abstract: Provided is a method for performing maintenance of a particulate which can reliably remove combustion residue by means of backwash air without use of hot water and the like while cutting equipment expenses, so that substantial increase in exhaust pressure and deterioration of fuel economy during operation can be prevented. When maintenance of the particulate filter 4 is to be performed, a filler 13 is filled to each of passages 8 with outlets unplugged with plugs 9 so as to reduce an inner volume of the passage 8, and then backwash air 12 is blown into the passages 8 with the unplugged outlets.

Abstract: Provided is a method for performing maintenance of a particulate which can reliably remove combustion residue by means of backwash air without use of hot water and the like while cutting equipment expenses, so that substantial increase in exhaust pressure and deterioration of fuel economy during operation can be prevented. When maintenance of the particulate filter 4 is to be performed, a filler 13 is filled to each of passages 8 with outlets unplugged with plugs 9 so as to reduce an inner volume of the passage 8, and then backwash air 12 is blown into the passages 8 with the unplugged outlets.

Abstract: An arrangement is provided for an exhaust emission control device having a filter cartridge fitted through insertion into an inner shell of a muffler. The inner shell is formed to have an inner diameter greater than an outer diameter of a cartridge shell to provide an insertion clearance. The inner shell is formed with an inward, tapered portion gradually reduced in diameter toward a direction of insertion of the filter cartridge, with a portion of the inner shell inward of the tapered portion formed as a small-diameter portion having a reduced insertion clearance. Sealing and cushioning materials are fitted over the outer peripheral surface on an inward end of the cartridge shell and are adapted to be held in a clamped manner between the filter cartridge and the small-diameter portion of the inner shell upon fitting of the filter cartridge.

Abstract: While easiness in insertion of a filter cartridge into an inner shell is improved, reliably prevented is exhaust gas from bypassing a particulate filter and a filter cartridge from backlashing. Disclosed is an exhaust emission control device with a filter cartridge 11 fitted through insertion into an inner shell 8 of a muffler. The inner shell 8 is formed to have an inner diameter greater than an outer diameter of a cartridge shell 10 to provide an insertion clearance C. The inner shell 8 is formed with an inward, tapered portion 8b gradually reduced in diameter toward a direction of insertion of the filter cartridge 11, so that a portion of the inner shell inward of the tapered portion is formed as a small-diameter portion 8c with the reduced insertion clearance C.

Abstract: An object is to make it possible to accurately detect temperature of exhaust directly flowing through a particulate filter stored in a muffler. In an exhaust emission control device with the particulate filter 9 stored in the muffler 1 which in turn is incorporated in an exhaust pipe, a recess is formed by a cup 21 at a temperature detecting area on a casing 2 of the muffler 1. The recess is concave up to a position in proximity to the particulate filter 9 in the casing 2. A temperature sensor 22 is arranged to penetrate a deepest portion of the recess formed by the cup 21.