| 摘要 |
In this DPF apparatus, the filters(1, 2) have large trapping areas and three-dimensionally and efficiently trap particulates contained in the exhaust gas thereby cleaning the gas and reducing the size of the apparatus. The DPF apparatus has the main filter(1) installed in the case(3) incorporated into the exhaust system, the sub-filter(2) arranged in the central portion of the main filter(1), and the bypass cylinder(4) interposed between these filters. The bypass valve(7) is installed on the exhaust gas inflow side of the sub-filter(2) to open and close the inflow port of the sub-filter(2). The main filter(1) and the sub-filter(2) are made from ceramics porous sheet filters(47), or comprise a nonwoven cloth(38) made of silicon carbide fibers and a woven cloth(31, 39) made of ceramics long fibers chosen from Si-C and Si-C-Ti-O long fibers and arranged adjacent to and downstream of the nonwoven cloth(38). The mesh heaters (6) are laminated over the main filter(1) on the exhaust gas inflow side. <IMAGE> |
