Counterflow type particulate matter filter trap system having metal fiber filter

Claim 2

A counterflow type particulate matter filter trap system having a metal fiber filter as claimed in claim 1, wherein said compressed air supplying portion is installed at an outer portion of said filter trap system and comprises a compressed air on-off solenoid valve which is opened and closed by said controller, a compressed air supplying line which passes through said filter trap system from an outer portion to an inner portion of said filter trap system and is connected to said compressed air on-off solenoid valve, for introducing said compressed air from said compressed air on-off solenoid valve into said inner portion of said filter trap system, and a compressed air supplying nozzle for injecting said compressed air introduced from said compressed air supplying line to said metal fiber filter.

Claim 3

A counterflow type particulate matter filter trap system having a metal fiber filter as in claim 1 or 2, wherein at least one electric heater is provided in said particulate matters collecting box for burning said collected particulate matters by said metal fiber filter.

Claim 4

A counterflow type particulate matter filter trap system having a metal fiber filter as in any preceding claim, wherein said metal fiber filter is a corrugated metal fiber filter.

Claim 5

A counterflow type particulate matter filter trap system having a metal fiber filter as claimed in any preceding claim, wherein said guiding valve rotates and rises by a predetermined degree to open an inlet of said particulate matters collecting box and guide said particulate matters into said collecting box.

Claim 6

A counterflow type particulate matter filter trap system having a metal fiber filter as in any preceding claim, further comprising a sensor for sensing engine operating condition to provide information to said controller, and a by-pass valve for controlling a passageway of said exhaust gases according to a signal from said controller.

Claim 7

A counterflow type particulate matter filter trap system having a metal fiber filter as claimed in claim 6, wherein said by-pass valve is operated to cut-off a flow of said exhaust gases to said metal fiber filter and to form a separate exhausting passageway to an outer portion of said filter trap system by said controller which receives information from said sensor for sensing an engine operating condition when an engine velocity is higher than a predetermined velocity and when an engine load is larger than a predetermined load.

Claim 8

A counterflow type particulate matter filter trap system having a metal fiber filter comprising: 1) a controller for receiving and sending information signals; and 2) a first and a second filter trap systems comprising: a first and a second metal fiber filters for capturing particulate matters in engine exhaust gases; a first and a second back pressure sensors for respectively sensing pressure differences between inlets and outlets of said first and said second metal fiber filters and for transmitting signals on said pressure differences to said controller; a first and a second compressed air supplying portions which operate by signals from said controller which outputs information signals according to said signals received from said first and said second back pressure sensors, for respectively injecting compressed airs in opposite directions to flows of said exhaust gases to separate said captured particulate matters at said first and said second metal fiber filters; a first and a second particulate matters collecting boxes for respectively collecting said particulate matters separated from said first and said second metal fiber filters; and a first and a second guiding valves for respectively guiding said particulate matters separated from said first and said second metal fiber filters according to information signals sent from said controller.

Claim 9

A counterflow type particulate matter filter trap system having a metal fiber filter as claimed in claim 8, wherein said first and said second compressed air supplying portions are respectively installed at outer portions of said first and said second filter trap systems and comprise a first and a second compressed air on-off solenoid valves which are opened and closed by said controller, a first and a second compressed air supplying lines which respectively pass through said first and said second filter trap systems from outer portions to inner portions of said first and said second filter trap systems and are respectively connected to said first and said second compressed air on-off solenoid valves, for introducing said compressed airs from said first and said second compressed air on-off solenoid valves into said inner portions of said first and said second filter trap systems, and a first and a second compressed air supplying nozzles for respectively injecting said compressed air introduced from said first and said second compressed air supplying lines to said first and said second metal fiber filters.

Claim 10

A counterlow type particulate matter filter trap system having a metal fiber filter as claimed in claim 8, wherein said first and said second guiding valves rotate and rise by predetermined degrees to open inlets of said first and said second particulate matters collecting boxes and guide said particulate matters into said first and said second collecting boxes.

Claim 11

A counterflow type particulate matter filter trap system having a metal fiber filter as claimed in claim 10, wherein when one of inlets of said first and said second particulate martial collecting boxes is opened by one of said first and said second guiding valve, the remaining guiding valve closes an inlet of a corresponding collecting box.