A flammable-gas led-out pipe (5) has a terminal end portion (5a) disposed in an exhaust-gas route (7) and a metal cylinder (10) is arranged at the terminal end portion (5a) of the flammable-gas led-out pipe (5). An oxidation catalyst (8) is disposed within the metal cylinder (10). On an upstream sid
A flammable-gas led-out pipe (5) has a terminal end portion (5a) disposed in an exhaust-gas route (7) and a metal cylinder (10) is arranged at the terminal end portion (5a) of the flammable-gas led-out pipe (5). An oxidation catalyst (8) is disposed within the metal cylinder (10). On an upstream side of the oxidation catalyst (8), an air-supply passage (12) is opened to provide an outlet (12a) and the flammable gas (4) merges with supplied air (13). The flammable gas (4) is burnt with the oxidation catalyst (8) to produce catalyst-combustion heat, which is radiated from an outer peripheral surface of the metal cylinder (10) into the exhaust gas (9) in the exhaust-gas route (7) and the exhaust gas (9) heated by this heat-radiation is mixed with the flammable gas (4) that has passed through the oxidation catalyst (8).
대표청구항▼
1. An exhaust device for a diesel engine having a diesel engine exhaust gas (9) in an exhaust-gas route (7) upstream of a diesel-particulate-filter (6), the exhaust device using a supplied air (13) and a liquid fuel (3) from a liquid-fuel supply source (1) supplying the liquid fuel (3) to a gas gene
1. An exhaust device for a diesel engine having a diesel engine exhaust gas (9) in an exhaust-gas route (7) upstream of a diesel-particulate-filter (6), the exhaust device using a supplied air (13) and a liquid fuel (3) from a liquid-fuel supply source (1) supplying the liquid fuel (3) to a gas generator (2) configured to convert the liquid fuel (3) to flammable gas (4) for burning exhaust-gas fine particles residual at the diesel-particulate-filter (6), the exhaust device comprising: a flammable-gas led-out pipe (5) communicated with the gas generator (2) and the exhaust-gas route (7), the flammable-gas led-out pipe (5) having a terminal end portion (5a) disposed within the exhaust-gas route (7) upstream of the diesel-particulate filter (6);a metal cylinder (10) arranged at the terminal end portion (5a) of the flammable-gas led-out pipe (5), the metal cylinder having an outer peripheral surface;an oxidation catalyst (8) disposed within the metal cylinder (10) andan air-supply passage (12) on the upstream side of the oxidation catalyst (8), the air-supply passage (12) having an outlet (12a) arranged in the metal cylinder (10) to allow the supplied air (13) to merge with the flammable gas (4),wherein the flammable gas (4), upon merging with the supplied air (13) is burnt with the oxidation catalyst (8) to produce combustion heat radiating from the outer peripheral surface of the metal cylinder (10) into the exhaust gas (9) in the exhaust-gas route (7) heating the exhaust gas (9) mixing with the flammable gas (4) that has passed through the oxidation catalyst (8), the flammable-gas led-out pipe (5) enters the exhaust-gas route (7) by penetrating a peripheral wall thereof and has the terminal end portion (5a) to which the metal cylinder (10) is disposed along a central portion of the exhaust gas route (7), and the air-supply passage (12) enters the flammable-gas led-out pipe (5) by penetrating a peripheral wall thereof outside the exhaust-gas route (7) and has the outlet (12a) which is opened inside the flammable-gas led-out pipe (5) within the exhaust-gas route (7). 2. The exhaust device for a diesel engine as set forth in claim 1, wherein each of the terminal end portion (5a) of the flammable-gas led-out pipe (5) and the metal cylinder (10) has an axial direction extending along an axial direction of the exhaust-gas route (7), the metal cylinder (10) having an interior area a portion of which exists on a downstream side of the oxidation catalyst (8) and is made to serve as an oxidation-catalyst downstream chamber (14), which has an outlet opening (14a) directed toward a downstream side of the exhaust-gas route (7) as well as a terminal end opening (5b) of the flammable-gas led-out pipe (5). 3. The exhaust device for a diesel engine as set forth in claim 1, wherein a temperature-detecting means (17) for detecting how much the oxidation catalyst (8) is heated and an air-metering valve (18) is disposed in the air-supply passage (12), the air-metering valve (18) being associated with the temperature-detecting means (17) through a control means (19), the control means (19) adjusting an opening degree of the air-metering valve (18) based on a temperature detected by the temperature-detecting means (17), the oxidation catalyst (8) having a temperature maintained within a predetermined range. 4. The exhaust device for a diesel engine as set forth in claim 1, wherein the exhaust device includes the gas generator (2) and the gas generator (2) gasifies the liquid fuel (3) to convert it to the flammable gas (4). 5. The exhaust device for a diesel engine as set forth in claim 1, wherein the exhaust device includes the gas generator (2) and the gas generator (2) partially oxidizes the liquid fuel (3) to reform it to the flammable gas (4) which contains carbon monoxide and hydrogen. 6. The exhaust device for a diesel engine as set forth in claim 1, wherein within the exhaust-gas route (7), an outer cylinder (50) is provided coaxially with the metal cylinder (10) along an outer periphery of the metal cylinder (10) and an exhaust-gas heating passage (51) is provided between the metal cylinder (10) and the outer cylinder (50), part of the exhaust gas (9) in the exhaust-gas route (7) passing through the exhaust-gas heating passage (51), the combustion heat generated with the oxidation catalyst (8) being radiated from an outer peripheral surface of the metal cylinder (10) into the exhaust gas (9) in the exhaust-gas heating passage (51). 7. The exhaust device for a diesel engine as set forth in claim 6, wherein within the exhaust-gas heating passage (51), part of the exhaust gas (9) in the exhaust-gas route (7) is mixed with part of the flammable gas (4) that has passed through the oxidation catalyst (8). 8. The exhaust device for a diesel engine as set forth in claim 6, wherein the outer cylinder (50) is formed from metal and is thermo-conductively connected to the metal cylinder (10), the combustion heat generated with the oxidation catalyst (8) is also radiated from an inner peripheral surface of the outer cylinder (50) into the exhaust gas (9) in the exhaust-gas heating passage (51). 9. The exhaust device for a diesel engine as set forth in claim 1, wherein there is arranged between the outlet (12a) of the air-supply passage (12) and the oxidation catalyst (8), an air-mixing passage (54) in which a throttle orifice (52) and an expansion chamber (53) are alternately arranged and the flammable gas (4) is mixed with the supplied air (13). 10. The exhaust device for a diesel engine as set forth in claim 1, wherein the metal cylinder (10) comprises the terminal end portion (5a) of the flammable-gas led-out pipe (5). 11. The exhaust device for a diesel engine as set forth in claim 6, wherein the outer cylinder (50) comprises the terminal end portion (5a) of the flammable-gas led-out pipe (5). 12. The exhaust device for a diesel engine as set forth in claim 1, wherein on an upstream side of the filter (6), a downstream oxidation catalyst (57) is disposed downstream of the metal cylinder (10), so that the flammable gas (4) released from the metal cylinder (10) is burnt with the downstream oxidation catalyst (57). 13. An exhaust device for a diesel engine having a diesel engine exhaust gas (9) in an exhaust-gas route (7) upstream of a diesel-particulate-filter (6), the exhaust device using a supplied air (13) and a liquid fuel (3) from a liquid-fuel supply source (1) supplying the liquid fuel (3) to a gas generator (2) configured to convert the liquid fuel (3) to flammable gas (4) for burning exhaust-gas fine particles residual at the diesel-particulate-filter (6), the exhaust device comprising: a flammable-gas led-out pipe (5) communicated with the gas generator (2) and the exhaust-gas route (7);a terminal end portion (5a) of the flammable-gas led-out pipe (5), the terminal end portion (5a) being disposed within the exhaust-gas route (7) upstream of the diesel-particulate filter (6) and facing toward downstream of the exhaust-gas route (7);a metal cylinder (10) arranged at the terminal end portion (5a) of the flammable-gas led-out pipe (5), the metal cylinder having an outer peripheral surface;an oxidation catalyst (8) disposed within the metal cylinder (10);an air-supply passage (12) in the terminal end portion (5a) of the flammable-gas led-out pipe (5) on the upstream side of the oxidation catalyst (8); andan air mixing passage (54) arranged between the outlet (12a) of the air-supply passage (12) and the oxidation catalyst (8), the air mixing passage (54) having a throttle orifice (52) and an expansion chamber (53) alternately arranged to mix the flammable gas (4) with the supplied air (13),wherein the flammable gas (4), upon merging with the supplied air (13) is burnt with the oxidation catalyst (8) to produce combustion heat, radiating from the outer peripheral surface of the metal cylinder (10) into the exhaust gas (9) in the exhaust-gas route (7) heating the exhaust gas (9) mixing with the flammable gas (4) that has passed through the oxidation catalyst (8), the flammable-gas led-out pipe (5) enters the exhaust-gas route (7) by penetrating a peripheral wall thereof and has the terminal end portion (5a) to which the metal cylinder (10) is disposed along a central portion of the exhaust-gas route (7), and the air-supply passage (12) enters the flammable-gas led-out pipe (5) by penetrating a peripheral wall thereof outside the exhaust-gas route (7) and has the outlet (12a) which is opened inside the flammable-gas led-out pipe (5) within the exhaust-gas route (7). 14. An exhaust device for a diesel engine having a diesel engine exhaust gas (9) in an exhaust-gas route (7) upstream of a diesel-particulate-filter (6), the exhaust device using a supplied air (13) and a liquid fuel (3) from a liquid-fuel supply source (1) supplying the liquid fuel (3) to a gas generator (2) configured to convert the liquid fuel (3) to flammable gas (4) for burning exhaust-gas fine particles residual at the diesel-particulate-filter (6), the exhaust device comprising: a flammable-gas led-out pipe (5) communicated with the gas generator (2) and the exhaust-gas route (7), the flammable-gas led-out pipe (5) having a terminal end portion (5a) disposed within the exhaust-gas route (7) upstream of the diesel-particulate filter (6);a metal cylinder (10) arranged at the terminal end portion (5a) of the flammable-gas led-out pipe (5);an oxidation catalyst (8) disposed within the metal cylinder (10);an air-supply passage (12) having an outlet (12a) disposed within the metal cylinder (10) on the upstream side of the oxidation catalyst (8); andan mixing passage (54) arranged between the outlet (12a) of the air-supply passage (12) and the oxidation catalyst (8), the mixing passage (54) configured to mix the flammable gas (4) with the supplied air (13),wherein the flammable-gas led-out pipe (5) enters the exhaust-gas route (7) by penetrating a peripheral wall thereof and has the terminal end portion (5a) to which the metal cylinder (10) is disposed along a central portion of the exhaust-gas route (7), and the air-supply passage (12) enters the flammable-gas led-out pipe (5) by penetrating a peripheral wall thereof outside the exhaust-gas route (7) and has the outlet (12a) which is opened inside the flammable-gas led-out pipe (5) within the exhaust-gas route (7).
Abe Yukihiro,JPX ; Kawatsu Takao,JPX ; Iwamoto Yoshihide,JPX, Black smoke eliminating device for internal combustion engine and exhaust gas cleaning system including the device.
Hrtel Gnter (Neuss DEX) Schrfeld Armin (Meerbusch DEX) Rttges Riedel (Tnisvorst DEX) Hullmann Matthias (Kaarst DEX), Burner system for detoxification or cleaning the exhaust gases of an internal combustion engine.
Frankenberg Alfred A. (Knoxville TN) Scott Douglas R. (Knoxville TN), Exhaust system for an internal combustion engine, burn-off unit and methods therefor.
Nagel, Thomas; Kruse, Carsten; Mueller, Joerg-Uwe; Haenisch, Jan; Oesterle, Joerg; Leicht, Sebastian, Device for exhaust-gas treatment near an engine and motor vehicle having the device.
Neels, Jacobus; Sederquist, Richard; Li, Xuantian; Cumaranatunge, Lasitha; McConnell, Campbell R., System and method for regenerating an engine exhaust after-treatment device.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.