Abstract: An exhaust emission control device with a particulate filter and a selective reduction catalyst (exhaust purification catalyst) incorporated in an exhaust pipe such that the former and the latter are arranged on downstream and upstream sides, respectively, has a burner for generating high-temperature exhaust gas by combustion, an exhaust distribution pipe capable of guiding the exhaust gas from the burner to entry sides of the filter and the catalyst, respectively, and valves as a path switcher in the pipe for selectively sorting the exhaust gas from the burner any one of the entry sides of the filter and the catalyst.

Abstract: An exhaust emission control device with a particulate filter 1 and a selective reduction catalyst 6 (exhaust purification catalyst) incorporated in an exhaust pipe 10 such that the former and the latter are arranged on downstream and upstream sides, respectively, has a burner 2 for generating high-temperature exhaust gas by combustion, an exhaust distribution pipe 14 capable of guiding the exhaust gas 13 from the burner 2 to entry sides of the filter 1 and the catalyst 6, respectively, and valves 15 and 16 as path switcher in the pipe 14 for selectively sorting the exhaust gas 13 from the burner 2 any one of the entry sides of the filter 1 and the catalyst 6.

Abstract: Attained is a heat generative exhaust emission control device with less electric power consumption and with no harmful gas discharged to atmosphere. A porous filter body 7 for capturing particulates in exhaust gas 2 through passing of the exhaust gas 2 is provided with an electric heater 9 so as to heat the filter body 7; thus, a heat regenerative particulate filter 10 is provided. The heat regenerative particulate filters 10 are accommodated in filter casings 11 and 12 within an exhaust pipe 3, and oxidation catalysts 13 and 14 are arranged upstream and downstream of and adjacent to the heat regenerative particulate filter 10 so as to obtain thermo-keeping or heat insulation effect to the heat regenerative particulate filter 10.

Abstract: An oxidation catalyst arranged frontward of a catalytic regenerative particulate filter is prevented from being clogged. Disclosed is an exhaust emission control device in which a catalytic regenerative particulate filter 4 is incorporated in an exhaust pipe 3 and has a flow-through type oxidation catalyst arranged frontward of the filter, fuel being added to exhaust gas 2 upstream of the particulate filter 4, heat generated by oxidation reaction of the added fuel on the frontward oxidation catalyst being used for combustion of captured particulates in the backward particulate filter to forcedly regenerate the particulate filter. Arranged frontward of the catalytic regenerative particulate filter 4 is the flow-through type oxidation catalyst 12 carried by a honeycomb-structured metallic carrier.

Abstract: An exhaust emission control device is realized which causes no battery exhaustion nor deterioration in engine startability even when the forced regeneration using the electric heater is conducted in the engine stopping status. Disclosed is an exhaust emission control device in which adopted as a filter body 7 for capturing particulates is a heat-regenerative particulate filter 10 with electric heater, the captured particulates being burned by heating of the electric heater 9 to forcedly regenerate the particulate filter 10. A control unit 37 responsible for a series of control operations with respect to the forced regeneration of the particulate filter 10 is constructed such that the forced regeneration in an engine stopping status is conduced only when the voltage of the battery 34 is higher than a stipulated value, and is temporarily interrupted when engine starting operation is conducted during the forced regeneration in the engine stopping status.

Abstract: Attained is a heat generative exhaust emission control device with less electric power consumption and with no harmful gas discharged to atmosphere. A porous filter body 7 for capturing particulates in exhaust gas 2 through passing of the exhaust gas 2 is provided with an electric heater 9 so as to heat the filter body 7; thus, a heat regenerative particulate filter 10 is provided. The heat regenerative particulate filters 10 are accommodated in filter casings 11 and 12 within an exhaust pipe 3, and oxidation catalysts 13 and 14 are arranged upstream and downstream of and adjacent to the heat regenerative particulate filter 10 so as to obtain thermo-keeping or heat insulation effect to the heat regenerative particulate filter 10.

Abstract: Provided is a plasma assisted exhaust emission control device with less electric power consumption and with no harmful gas discharged into atmosphere. A filter body 7 is constituted by porous members through which exhaust gas 2 passes for capturing of particulates in the exhaust gas 2 and is provided with rod-like and cylindrical electrodes 9 and 10 so as to generate plasma in the filter body 7, thereby providing a plasma regenerative particulate filter 11. The particulate filter 11 is accommodated in a filter casing within an exhaust pipe 3. Oxidation catalysts 16 and are arranged respectively upstream and downstream of adjacent to the particular filter 11 in the filter casing 12 so as to obtain heat insulation effect to the particulate filter 11.

Abstract: Fuel is added to exhaust gas 9 upstream of a catalytic regeneration type particulate filter 13 in an exhaust pipe 11. The fuel added is oxidized on a flow-through type oxidization catalyst 14 before the particulate filter 13 to generate exothermic heat with which captured and accumulated particulates in the particulate filter 13 are burned off to forcibly regenerate the particulate filter 13. When the driving is being performed in light-load engine operation areas upon forcible regeneration of the particulate filter 13, a retarder 22 is activated, with an accelerator pedal retaining its on-state, and an amount of fuel injected is increased to compensate reduction of torque due to such activation of the retarder 22.

Abstract: There is provided a filtering means regenerating system for a diesel engine, in which the filtering means provided in an exhaust gas passage oxidizes NO in exhaust gas of the engine into NO2, and collects particulates in exhaust gas to thereby oxidize the particulates by NO2 and remove the same at a temperature higher than a predetermined exhaust gas temperature. Also, an in-line fuel injection system for injecting fuel into the engine is provided with a variable timer mechanism for regulating the injection timing of fuel, and the deposit of particulates deposited on the filtering means is detected by deposit detecting means. A controller controls the variable timer mechanism based on the detection output of the deposit detecting means. The filtering means is prevented from becoming in an excessively collecting state in all operation statuses of the engine, thereby preventing a decrease in fuel economy and power performance of the engine.

Abstract: Fuel is added to exhaust gas 9 upstream of a catalytic regeneration type particulate filter 13 in an exhaust pipe 11. The fuel added is oxidized on a flow-through type oxidization catalyst 14 before the particulate filter 13 to generate exothermic heat with which captured and accumulated particulates in the particulate filter 13 are burned off to forcibly regenerate the particulate filter 13. When the driving is being performed in light-load engine operation areas upon forcible regeneration of the particulate filter 13, a retarder 22 is activated, with an accelerator pedal retaining its on-state, and an amount of fuel injected is increased to compensate reduction of torque due to such activation of the retarder 22.

Abstract: A power-saving and long-life particulate incinerating mechanism for use in a reverse-cleaning regenerative exhaust black smoke removing system. Also disclosed is a particulate incinerating method therefor. A hopper has a bottom portion and slant portions made of a heat-insulating material. An air pipe having a large number of small holes extends substantially along the hopper bottom. A heater extends above the air pipe in parallel to it. The small holes of the air pipe are formed such that air can be jetted out from the small holes toward the heater. A relatively small quantity of particulate burning assist air is always supplied from the small holes of the air pipe, and a relatively large quantity of purging air is substantially periodically supplied from the small holes.

Abstract: A filter regenerating mechanism for a reverse-cleaning regenerative exhaust black smoke removing system, wherein the air injection quantity is reduced, and the filter regenerating effect is improved to reduce a pressure loss due to the filter. Each time exhaust gas is passed through the filter for a predetermined period of time, a solenoid valve is opened for an extremely short period of time, thereby allowing compressed air to be supplied into an exhaust chamber through the solenoid valve, an air nozzle, etc. so as to flow in a direction reverse to the flow direction of exhaust gas. Particulates deposited on the wall surfaces of first passages in the filter are removed therefrom by the action of pressure waves and cleaning air stream produced upon opening of the solenoid valve, and gravitationally drop into a hopper where they are incinerated. A perforated plate having a large number of small holes is disposed between the air nozzle and an outlet surface of the filter.

Abstract: A back washing and regenerating apparatus for a diesel particulate filter, which can reliably, efficiently and instantly back wash particulate filters to regeneration in all zones which are not locally restricted. An impact air valve is positioned downstream of a particulate filter for blowing off particulates adhered to the particulate filter by an impact wave from the impact air valve into a particulate burning section and burning them off by the heat of a heater in the particulate burning section.