Abstract: A method of controlling regeneration of a selective catalytic reduction (SCR) on a diesel particulate filter (DPF) (SDPF) by using an increase in a temperature of exhaust gas of a vehicle include confirming whether the vehicle is in an idle state or whether the vehicle enters a re-start after a start-stop before the regeneration of the SDPF and determining an entrance condition, determining, when the entrance condition is satisfied, a quantity of urea injection and a quantity of urea accumulated before the regeneration and determining whether the determined quantity of urea injection does not exceed a target quantity of urea, and increasing a temperature within a filter of the SDPF to a predetermined value or more during the regeneration of the SDPF and removing urea deposited at the lower end portion of the filter.

Abstract: A method of controlling regeneration of a selective catalytic reduction (SCR) on a diesel particulate filter (DPF) (SDPF) by using an increase in a temperature of exhaust gas of a vehicle include confirming whether the vehicle is in an idle state or whether the vehicle enters a re-start after a start-stop before the regeneration of the SDPF and determining an entrance condition, determining, when the entrance condition is satisfied, a quantity of urea injection and a quantity of urea accumulated before the regeneration and determining whether the determined quantity of urea injection does not exceed a target quantity of urea, and increasing a temperature within a filter of the SDPF to a predetermined value or more during the regeneration of the SDPF and removing urea deposited at the lower end portion of the filter.

Abstract: A method for coating catalyst on a diesel particulate filter may include preparing a filter main body by using a substance through which a plurality of pores may be formed wherein a plurality of inlet channels and a plurality of outlet channels may be arranged alternatively, coating firstly a reduction catalytic agent by providing absorption pressure to an opposite channel to the selected channel while supplying wash coat solution containing the reduction catalytic agent to a selected channel from an inlet channel and an outlet channel of the filter main body, and coating secondly the reduction catalytic agent by providing absorption pressure to an opposite channel to the selected channel while supplying wash coat solution containing the reduction catalytic agent to a selected channel from an inlet channel and an outlet channel of the filter main body that has been coated firstly.

Abstract: A method for coating catalyst on a diesel particulate filter includes the steps of, preparing a filter main body by using a substance through which a plurality of pores are formed. coating firstly a reduction catalytic agent on the filter main body by immersing the filter main body into a wash coat solution containing the reduction catalytic agent. coating secondly the reduction catalytic agent on a region of the filter main body where a distribution of the firstly coated reduction catalytic agent is relatively low by providing absorption pressure to the other channel opposite to the selected one channel while supplying the wash coat solution containing the reduction catalytic agent to one channel that is selected from the inlet channel and the outlet channel of the filter main body that has been coated firstly.

Abstract: An exhaust gas purification system for a vehicle may include a diesel oxidation catalyst (DOC) unit installed at an exhaust pipe, and a composite catalyst unit installed at the exhaust pipe at a rear end of the DOC unit and including a selective catalyst reduction (SCR) catalyst and an oxidation catalyst formed at a diesel particulate matter filter (DPF). The exhaust gas purification system may also include an injector provided between the DOC unit and the composite catalyst unit and configured to inject a reducing agent into the exhaust pipe. The SCR catalyst may be formed at an exhaust gas inlet side of the DPF and the oxidation catalyst may be formed at an exhaust gas outlet side of the DPF.

Abstract: An exhaust gas post processing method, may include detecting driving conditions of an engine, determining a ratio of soluble organic matter and carbon particles trapped in a diesel particulate filter according to the detected driving conditions, selecting a first predetermined temperature and a first maintain time for eliminating the soluble organic matter according to the ratio of the soluble organic matter and the carbon particles, and controlling a temperature of the diesel particulate filter according thereto, and eliminating the soluble organic matter by sustaining the first predetermined temperature for the first maintain time, selecting a second predetermined temperature for eliminating the carbon particles, and controlling a temperature of the diesel particulate filter according thereto.

Abstract: An exhaust gas filter system in which an asymmetrical channel, in which the diameter of an inlet being opened is larger than that of an outlet disposed and opened at a rear end surface, is formed, may include a first coating layer that is formed at an inner surface of a front portion of the channel by coating a first wash coat, and a second coating layer that is formed at an inner surface of a rear portion of the channel by coating a second wash coat, wherein inner cross section of the front portion is wider than inner cross section of the rear portion.

Abstract: Disclosed herein is an aging method which can support an aging test for a catalyzed diesel particulate filter system through the post-injection of fuel according to a regeneration logic for a filter, thereby remarkably reducing the time and cost necessary for developing new diesel vehicles that meet regulations relevant to exhaust gas.

Abstract: A filter regeneration system for eliminating particulate matter generated in a diesel engine is disclosed. The filter generation system is adapted to determine a time to regenerate a filter to eliminate particulate matter discharged from the diesel engine and collected by the filter. The particulate matter is incinerated by increasing the exhaust gas temperature via an injection of fuel. The system comprises a collected amount detecting unit for detecting the amount of particulate matter collected by the filter; a control unit for determining a time to regenerate the filter based on the amount of collected particulate matter and for controlling the injection of fuel for incinerating the particulate matter; and a fuel supply unit mounted on an exhaust system for injecting the fuel in response to the control of the control unit.