Active Control System for Diesel Particulate Filter

Abstract

An active control system for diesel particulate filter includes a particulate filter unit, at least one sensor, a control unit, and a bypass unit. The sensor is in fluid communication with the particulate filter unit and electrically connected with the control unit so that the sensor is able to communicate with the control unit regarding the pressure and temperature readings of the exhaust gas flow. The bypass unit is in fluid communication with the particulate filter unit while a control valve of the bypass unit is electrically connected with the control unit. The control unit is able to operate the control valve depending upon the pressure and temperature readings of the sensor so that the bypass unit can be activated for the exhaust gas flow, where the bypass unit decreases the particulate matter buildup within the particulate filter unit and eliminates high engine exhaust back pressure.

What is claimed is: 
     
         1 . An active control system for diesel particulate filter comprises:
 a particulate filter unit;   at least one pressure sensor;   a control unit;   a bypass unit;   the particulate filter unit comprises a housing, an exhaust inlet, an exhaust outlet, and a diesel particulate filter (DPF);   the bypass unit comprises at least one control valve, a diverter duct, and a return duct;   the at least one pressure sensor being in fluid communication with the particulate filter unit;   the at least one pressure sensor being electrically connected with the control unit;   the bypass unit being in fluid communication with the particulate filter unit through the diverter duct and the return duct; and   the at least one bypass unit being electrically connected with the control unit.   
     
     
         2 . The active control system for diesel particulate filter as claimed in  claim 1  comprises:
 the exhaust inlet and the exhaust outlet being in fluid communication with the housing; 
 the exhaust inlet and the exhaust outlet being oppositely positioned of each other across the housing; 
 the DPF being internally connected to the housing; and 
 the DPF being positioned in between the exhaust inlet and the exhaust outlet. 
 
     
     
         3 . The active control system for diesel particulate filter as claimed in  claim 1  comprises:
 the diverter duct being in fluid communication with the exhaust inlet; 
 the at least one control valve being in fluid communication with the diverter duct opposite of the exhaust inlet; 
 the return duct being in fluid communication with the at least one control valve opposite of the diverter duct; and 
 the return duct being in fluid communication with the exhaust outlet opposite of the at least one control valve. 
 
     
     
         4 . The active control system for diesel particulate filter as claimed in  claim 3  comprises:
 the at least one control valve comprises an input channel and an output channel; 
 the at least one control valve being in fluid communication with the diverter duct through the input channel; and 
 the at least one control valve being in fluid communication with the return duct through the output channel. 
 
     
     
         5 . The active control system for diesel particulate filter as claimed in  claim 1  comprises:
 the at least one control valve comprises an actuator; 
 the actuator being operatively coupled to the control valve; and 
 the actuator being electrically connected to the control unit. 
 
     
     
         6 . The active control system for diesel particulate filter as claimed in  claim 1  comprises:
 the at least one pressure sensor comprises an inlet pressure sensor and an outlet pressure sensor; 
 the inlet pressure sensor being in fluid communication with the exhaust inlet adjacent to the housing; 
 the outlet pressure sensor being in fluid communication with the exhaust outlet adjacent to the housing; and 
 the inlet pressure sensor and the outlet pressure sensor being electrically connected with the control unit. 
 
     
     
         7 . The active control system for diesel particulate filter as claimed in  claim 1  comprises:
 the at least one pressure sensor comprises an inlet pressure sensor; 
 the inlet pressure sensor being in fluid communication with the exhaust inlet adjacent to the housing; and 
 the inlet pressure sensor being electrically connected with the control unit. 
 
     
     
         8 . An active control system for diesel particulate filter comprises:
 a particulate filter unit;   at least one pressure sensor;   a control unit;   a bypass unit;   the particulate filter unit comprises a housing, an exhaust inlet, an exhaust outlet, and a diesel particulate filter (DPF);   the bypass unit comprises at least one control valve, a diverter duct, and a return duct;   the at least one pressure sensor being in fluid communication with the particulate filter unit;   the at least one pressure sensor being electrically connected with the control unit;   the exhaust inlet and the exhaust outlet being in fluid communication with the housing;   the diverter duct being in fluid communication with the exhaust inlet;   the at least one control valve being in fluid communication with the diverter duct opposite of the exhaust inlet;   the return duct being in fluid communication with the at least one control valve opposite of the diverter duct;   the return duct being in fluid communication with the exhaust outlet opposite of the at least one control valve; and   the at least one bypass unit being electrically connected with the control unit.   
     
     
         9 . The active control system for diesel particulate filter as claimed in  claim 8  comprises:
 the exhaust inlet and the exhaust outlet being oppositely positioned of each other across the housing; 
 the DPF being internally connected to the housing; and 
 the DPF being positioned in between the exhaust inlet and the exhaust outlet. 
 
     
     
         10 . The active control system for diesel particulate filter as claimed in  claim 8  comprises:
 the at least one control valve comprises an input channel and an output channel; 
 the at least one control valve being in fluid communication with the diverter duct through the input channel; and 
 the at least one control valve being in fluid communication with the return duct through the output channel. 
 
     
     
         11 . The active control system for diesel particulate filter as claimed in  claim 8  comprises:
 the at least one control valve comprises an actuator; 
 the actuator being operatively coupled to the control valve; and 
 the actuator being electrically connected to the control unit. 
 
     
     
         12 . The active control system for diesel particulate filter as claimed in  claim 8  comprises:
 the at least one pressure sensor comprises an inlet pressure sensor and an outlet pressure sensor; 
 the inlet pressure sensor being in fluid communication with the exhaust inlet adjacent to the housing; 
 the outlet pressure sensor being in fluid communication with the exhaust outlet adjacent to the housing; and 
 the inlet pressure sensor and the outlet pressure sensor being electrically connected with the control unit. 
 
     
     
         13 . The active control system for diesel particulate filter as claimed in  claim 8  comprises:
 the at least one pressure sensor comprises an inlet pressure sensor; 
 the inlet pressure sensor being in fluid communication with the exhaust inlet adjacent to the housing; and 
 the inlet pressure sensor being electrically connected with the control unit. 
 
     
     
         14 . An active control system for diesel particulate filter comprises:
 a particulate filter unit;   at least one pressure sensor;   a control unit;   a bypass unit;   the particulate filter unit comprises a housing, an exhaust inlet, an exhaust outlet, and a diesel particulate filter (DPF);   the bypass unit comprises at least one control valve, a diverter duct, and a return duct;   the at least one pressure sensor being in fluid communication with the particulate filter unit;   the at least one pressure sensor being electrically connected with the control unit;   the exhaust inlet and the exhaust outlet being in fluid communication with the housing;   the diverter duct being in fluid communication with the exhaust inlet;   the at least one control valve being in fluid communication with the diverter duct opposite of the exhaust inlet;   the return duct being in fluid communication with the at least one control valve opposite of the diverter duct;   the return duct being in fluid communication with the exhaust outlet opposite of the at least one control valve;   the at least one control valve comprises an actuator;   the actuator being operatively coupled to the control valve; and   the actuator being electrically connected to the control unit.   
     
     
         15 . The active control system for diesel particulate filter as claimed in  claim 14  comprises:
 the exhaust inlet and the exhaust outlet being oppositely positioned of each other across the housing; 
 the DPF being internally connected to the housing; and 
 the DPF being positioned in between the exhaust inlet and the exhaust outlet. 
 
     
     
         16 . The active control system for diesel particulate filter as claimed in  claim 14  comprises:
 the at least one control valve comprises an input channel and an output channel; 
 the at least one control valve being in fluid communication with the diverter duct through the input channel; and 
 the at least one control valve being in fluid communication with the return duct through the output channel. 
 
     
     
         17 . The active control system for diesel particulate filter as claimed in  claim 14  comprises:
 the at least one pressure sensor comprises an inlet pressure sensor and an outlet pressure sensor; 
 the inlet pressure sensor being in fluid communication with the exhaust inlet adjacent to the housing; 
 the outlet pressure sensor being in fluid communication with the exhaust outlet adjacent to the housing; and 
 the inlet pressure sensor and the outlet pressure sensor being electrically connected with the control unit. 
 
     
     
         18 . The active control system for diesel particulate filter as claimed in  claim 14  comprises:
 the at least one pressure sensor comprises an inlet pressure sensor; 
 the inlet pressure sensor being in fluid communication with the exhaust inlet adjacent to the housing; and 
 the inlet pressure sensor being electrically connected with the control unit.