Patent ID: 6010547
Filing Date: 2000-01-04
Classification: F01N,Y10S

Abstract:
A counterflow particulate matter filter trap system comprising:a controller for receiving and sending information signals;a metal fiber filter for capturing particulate matters included in engine exhaust gases, said metal fiber filter being a corrugated metal fiber filter;a back pressure sensor for sensing a pressure difference between an inlet and an outlet of said metal fiber filter and for transmitting a signal on said pressure difference to said controller;a compressed air supplying portion which operates by a signal from said controller which outputs an information signal according to said signal received from said back pressure sensor, for injecting a compressed air in an opposite direction to a flow of said exhaust gases to separate said captured particulate matters from said metal fiber filter, said compressed air supplying portion including a compressed air on-off solenoid valve operated by said controller, a compressed air supplying line connected to said compressed air on-off solenoid valve and extending over a full area of said metal fiber filter, and a plurality of compressed air supplying nozzles for injecting said compressed air introduced from said compressed air supplying line into the full area of said metal fiber filter;a particulate matters collecting box for collecting said particulate matters separated from said metal fiber filter; anda guiding valve for guiding said particulate separated from said metal fiber filter into said particulate matters collecting box according to an information signal sent from said controller.