US20040013579A1 - Device for treating exhaust gases - Google Patents
Device for treating exhaust gases Download PDFInfo
- Publication number
- US20040013579A1 US20040013579A1 US10/276,468 US27646803A US2004013579A1 US 20040013579 A1 US20040013579 A1 US 20040013579A1 US 27646803 A US27646803 A US 27646803A US 2004013579 A1 US2004013579 A1 US 2004013579A1
- Authority
- US
- United States
- Prior art keywords
- particle filter
- internal combustion
- combustion engine
- fuel
- exhaust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000007789 gas Substances 0.000 title description 22
- 239000002245 particle Substances 0.000 claims abstract description 35
- 230000003197 catalytic effect Effects 0.000 claims abstract description 21
- 238000002485 combustion reaction Methods 0.000 claims abstract description 20
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 39
- 239000000446 fuel Substances 0.000 claims description 33
- 238000007254 oxidation reaction Methods 0.000 claims description 14
- 230000003647 oxidation Effects 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 2
- 230000008929 regeneration Effects 0.000 abstract description 13
- 238000011069 regeneration method Methods 0.000 abstract description 13
- 239000004071 soot Substances 0.000 description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 8
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 8
- 239000001569 carbon dioxide Substances 0.000 description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 description 7
- 238000011161 development Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
- F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/16—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2250/00—Combinations of different methods of purification
- F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
Definitions
- the invention concerns a device for exhaust treatment of an internal combustion engine, in particular a diesel internal combustion engine, having a particle filter according to the preamble of claim 1.
- soot oxidizes at temperatures starting at approximately 550 to 600° C.
- the lower temperature threshold for the soot oxidation can be reduced to approximately 250 to 350° C.
- Burners have therefore been used in some commercial vehicles, for instance, whereby the filter is self-cleaned with a naked flame.
- the requirements for uniform distribution of temperature, ignition conditions, burning laws, etc. are very demanding, however, so that systems of this type are very expensive to realize.
- ignition and burning with a naked flame require that high safety requirements be placed on the entire system.
- the object of the invention is to propose a device for exhaust treatment of an internal combustion engine, in particular a diesel internal combustion engine, having a particle filter that markedly reduces the system-related expense and simultaneously ensures reliable particle filter regeneration at any operating point, whereby no safety-related risks occur.
- a device according to the invention differs in that the device comprises a catalytic burner, whereby the burner is located between the internal combustion engine and the particle filter.
- the furnishing of a fuel mixture that ignites and combusts well, as well as a device for igniting the mixture are advantageously eliminated.
- Safety-related risks associated with the ignition and combustion of the fuel mixture are eliminated.
- the catalytic material of the burner according to the invention ensures conversion of fuel even at exhaust-gas temperatures of approximately 200° C.
- a fuel metering device is preferably located between the internal combustion engine and the catalytic burner, so that fuel is metered as necessary, i.e., fuel is metered into the exhaust-gas flow before the catalytic burner when the exhaust-gas back pressure has reached a specified threshold value, for example. Fuel metering is stopped, for example, when the filter is self-cleaned.
- the fuel metering device comprises a fuel dispersal unit, so that the furnished fuel is brought in contact relatively well with the catalytic material of the burner, whereby the metered fuel is completely converted and, as a result, the heat required for filter regeneration is released.
- An open-loop control of the fuel metering device is advantageously provided, so that fuel metering takes place automatically, for example, at a specified back pressure of the exhaust gas, and it is switched off automatically when the filter is self-cleaned. Furthermore, a flexible adjustment of fuel metering is possible, e.g., depending on the exhaust-gas flow and/or its soot content.
- the device according to the invention comprises a nitrogen oxide oxidation unit, whereby it increasingly produces nitrogen dioxide (NO 2 ) in the exhaust-gas flow out of nitric oxide (NO) and oxygen (O 2 ).
- NO 2 nitrogen dioxide
- O 2 oxygen
- the reverse procedure takes place in the downstream-installed particle filter, and the released oxygen atom burns the carbon of the soot even at lower exhaust-gas temperatures, so that even more reliable particle filter regeneration is ensured.
- relatively low-sulphur diesel fuel is used, which prevents sustained damage to the nitrogen oxide oxidation unit.
- the device advantageously comprises a coated particle filter, which ensures further reduction of the lower soot-oxidation temperature. Regeneration on a catalytically-coated wall takes place relatively slowly, so that, advantageously, complete conversion of the appropriate substances takes place.
- the device comprises a heating device.
- a heating device for example, an electric heating device is used to ensure reliable particle filter regeneration, even under the most difficult operating conditions, e.g., during cold start, overrun fuel cutoff, etc.
- the catalytic burner can be brought to an optimal operating temperature relatively quickly.
- the invention described hereinabove ensures reliable particle filter regeneration, even under the most difficult conditions to be encountered in the internal combustion engines of motor vehicles, particularly under rapid throttle changes, cold-start conditions, overrun fuel cutoff, or during operation at different rotational speeds.
- FIG. 1 shows a schematic representation of a device for exhaust treatment according to the invention
- FIG. 2 shows a schematic representation of a further development of the device according to the invention with a nitrogen oxide oxidation unit and a heating device, and
- FIG. 3 shows a schematic representation of a second further development of the device according to the invention with a coated particle filter.
- FIG. 1 shows a device 1 for exhaust treatment, whereby exhaust gas 2 (with a temperature of approximately 200° C.) meets a catalytic burner 3 and then flows through a particle filter 4 .
- Fuel is dispersed in front of the catalytic burner 3 by means of a fuel metering device 5 , so that the exhaust gas 2 in the catalytic burner 3 is heated to approximately 600° C. due to the oxidation of fuel (HC) into water (H 2 O) and carbon dioxide (CO 2 ) and the heat released as a result.
- HC fuel
- H 2 O water
- CO 2 carbon dioxide
- the carbon (C) of the diesel soot reacts in the particle filter 4 with the rest of the oxygen (O 2 ) remaining in the exhaust gas 2 , and this binds to form carbon dioxide (CO 2 ).
- Fuel (HC) is supplied to the device ( 1 ), e.g., after a specified exhaust-gas back pressure is reached, and it is metered in the exhaust-gas flow until the particle filter 4 has self-cleaned, whereby the end of the furnishing of fuel can also take place in pressure-controlled fashion.
- FIG. 2 A further development of the device 1 is shown in FIG. 2 whereby, compared with the device in FIG. 1, it differs in that is also has a heating device 6 located on the catalytic burner 3 and a nitrogen oxide oxidation unit 7 located between the catalytic burner 3 and the particle filter 4 .
- a heating device 6 located on the catalytic burner 3 and a nitrogen oxide oxidation unit 7 located between the catalytic burner 3 and the particle filter 4 .
- the heating device 6 therefore-which is supplied with power by the electrical sources within the motor vehicle, for example, such as the battery or electric generator-reliable particle filter regeneration is ensured even under the most difficult operating conditions.
- the catalytic burner 3 can be heated specifically if necessary using the heating device 6 , so that optimal oxidation of the furnished fuel is ensured.
- Nitric oxide (NO) in the exhaust gas 2 is oxidized into nitrogen dioxide (NO 2 ) by means of the nitrogen oxide oxidation unit 7 .
- continuous combustion of the soot residue takes place in the particle filter 4 starting at an exhaust-gas temperature of approximately 250° C.
- the catalytic burner is switched on only when this temperature has not been reached for an extended period of time.
- the exemplary embodiment in FIG. 3 comprises—in comparison with the exemplary embodiment in FIG. 1—a coated particle filter 8 in place of the particle filter 4 .
- the coated particle filter 8 hereby combines the nitrogen oxide oxidation unit 7 and the particle filter 4 in FIG. 2 into one component, so that nitric oxide (NO) is oxidized into nitrogen dioxide (NO 2 ) in the coated particle filter 8 , which said nitrogen dioxide (NO 2 ) then oxidizes the soot according to this reaction equation: 2NO+C+O 2 2NO 2 +C 2NO+CO 2 .
- a further nitrogen oxide treatment can take place downstream if necessary.
- the catalytic coating also lowers the temperature required for the direct oxidation of soot.
- the fuel for the catalytic burner 3 can be furnished preferably in gaseous form as well as liquid form.
- the supply of fuel can take place periodically as well as continuously.
Abstract
A device (1) for exhaust treatment of an internal combustion engine, in particular a diesel internal combustion engine, having a particle filter (4), is proposed that is to be realized with less expense than conventional systems and ensures reliable particle filter regeneration. This is obtained according to the invention by the fact that the device (1) comprises a catalytic burner (3), whereby the burner (3) is located between the internal combustion engine and the particle filter (4).
Description
- The invention concerns a device for exhaust treatment of an internal combustion engine, in particular a diesel internal combustion engine, having a particle filter according to the preamble of
claim 1. - In accordance with growing understanding, legal regulations that govern the emissions of motor vehicles are continuously tightened in order to protect human health and the environment. To meet these specifications, in addition to using fuels that have been modified accordingly, solid particles are removed from exhaust gas using filters, for example.
- Diesel drives in particular produce large quantities of soot. It is suspected that diesel exhaust gas has carcinogenic potential. Numerous requirements for treatment of diesel exhaust gas have therefore been proposed. In general, these requirements consist of filter systems that retain the particulate constituents. An efficient filter effectively retains soot particles with a diameter of approximately 10 to 5000 nanometers in particular.
- Due to the fact that the filter and/or its surface become coated, however, the particles retained by such filters bring about a reduction in mixture flow and, as a result, cause filtration resistance to increase. This resistance leads to increased fuel consumption up to the point of engine standstill, so that frequent regeneration must be provided. Regeneration generally takes place by means of nearly residue-free combustion of the stored soot. The temperatures of approximately 200° C. present in diesel exhaust gas are usually inadequate for this purpose, so that additional system aids must be provided.
- Without additional measures, soot oxidizes at temperatures starting at approximately 550 to 600° C. By combining the soot filter with an oxidation catalytic converter or by providing a catalytic coating on the filter, the lower temperature threshold for the soot oxidation can be reduced to approximately 250 to 350° C. These temperatures are still above the usual exhaust-gas temperatures for modern diesel engines, however, so that temperature-increasing measures are required for reliable filter regeneration.
- To increase the exhaust-gas temperature, electric heating devices, microwave heating devices, or measures internal to the engine, for example, have been provided up to now, whereby they often make it necessary to provide additional batteries due to the high heat output required, they have a high associated system expense, or they cannot reliably ensure the necessary temperature increase, for example.
- Burners have therefore been used in some commercial vehicles, for instance, whereby the filter is self-cleaned with a naked flame. The requirements for uniform distribution of temperature, ignition conditions, burning laws, etc. are very demanding, however, so that systems of this type are very expensive to realize. Furthermore, ignition and burning with a naked flame require that high safety requirements be placed on the entire system.
- Accordingly, these exhaust-gas filter systems are relatively expensive overall, and/or they do not ensure a reliable temperature increase to regenerate the particle filter at any operating point.
- In contrast, the object of the invention is to propose a device for exhaust treatment of an internal combustion engine, in particular a diesel internal combustion engine, having a particle filter that markedly reduces the system-related expense and simultaneously ensures reliable particle filter regeneration at any operating point, whereby no safety-related risks occur.
- This object is attained by means of the characterizing features of
claim 1 based on a device of the type initially described. - As a result of the measures named in the dependent claims, advantageous embodiments and further developments of the invention are possible.
- Accordingly, a device according to the invention differs in that the device comprises a catalytic burner, whereby the burner is located between the internal combustion engine and the particle filter.
- With the aid of such a device, fuel (HC) with oxygen (O2) is converted in the catalytic converter to water (H2O) and carbon dioxide (CO2). The reaction heat that is released increases the exhaust-gas temperature to the regeneration temperature, so that regeneration of the particle filter takes place.
- According to the invention, the furnishing of a fuel mixture that ignites and combusts well, as well as a device for igniting the mixture are advantageously eliminated. Safety-related risks associated with the ignition and combustion of the fuel mixture are eliminated. The catalytic material of the burner according to the invention ensures conversion of fuel even at exhaust-gas temperatures of approximately 200° C.
- A fuel metering device is preferably located between the internal combustion engine and the catalytic burner, so that fuel is metered as necessary, i.e., fuel is metered into the exhaust-gas flow before the catalytic burner when the exhaust-gas back pressure has reached a specified threshold value, for example. Fuel metering is stopped, for example, when the filter is self-cleaned.
- In a particular further development of the invention, the fuel metering device comprises a fuel dispersal unit, so that the furnished fuel is brought in contact relatively well with the catalytic material of the burner, whereby the metered fuel is completely converted and, as a result, the heat required for filter regeneration is released.
- An open-loop control of the fuel metering device is advantageously provided, so that fuel metering takes place automatically, for example, at a specified back pressure of the exhaust gas, and it is switched off automatically when the filter is self-cleaned. Furthermore, a flexible adjustment of fuel metering is possible, e.g., depending on the exhaust-gas flow and/or its soot content.
- Advantageously, the device according to the invention comprises a nitrogen oxide oxidation unit, whereby it increasingly produces nitrogen dioxide (NO2) in the exhaust-gas flow out of nitric oxide (NO) and oxygen (O2). The reverse procedure takes place in the downstream-installed particle filter, and the released oxygen atom burns the carbon of the soot even at lower exhaust-gas temperatures, so that even more reliable particle filter regeneration is ensured. In the case of a diesel internal combustion engine, it must be kept in mind, however, that relatively low-sulphur diesel fuel is used, which prevents sustained damage to the nitrogen oxide oxidation unit.
- The device advantageously comprises a coated particle filter, which ensures further reduction of the lower soot-oxidation temperature. Regeneration on a catalytically-coated wall takes place relatively slowly, so that, advantageously, complete conversion of the appropriate substances takes place.
- In a particular further development of the invention, the device comprises a heating device. For example, an electric heating device is used to ensure reliable particle filter regeneration, even under the most difficult operating conditions, e.g., during cold start, overrun fuel cutoff, etc. Additionally, the catalytic burner can be brought to an optimal operating temperature relatively quickly.
- The invention described hereinabove ensures reliable particle filter regeneration, even under the most difficult conditions to be encountered in the internal combustion engines of motor vehicles, particularly under rapid throttle changes, cold-start conditions, overrun fuel cutoff, or during operation at different rotational speeds.
- An exemplary embodiment of the invention is presented in the drawing and it is explained in greater detail hereinbelow with reference to the drawings.
- FIG. 1 shows a schematic representation of a device for exhaust treatment according to the invention,
- FIG. 2 shows a schematic representation of a further development of the device according to the invention with a nitrogen oxide oxidation unit and a heating device, and
- FIG. 3 shows a schematic representation of a second further development of the device according to the invention with a coated particle filter.
- FIG. 1 shows a
device 1 for exhaust treatment, whereby exhaust gas 2 (with a temperature of approximately 200° C.) meets acatalytic burner 3 and then flows through aparticle filter 4. Fuel is dispersed in front of thecatalytic burner 3 by means of a fuel metering device 5, so that theexhaust gas 2 in thecatalytic burner 3 is heated to approximately 600° C. due to the oxidation of fuel (HC) into water (H2O) and carbon dioxide (CO2) and the heat released as a result. At these exhaust-gas temperatures, the carbon (C) of the diesel soot reacts in theparticle filter 4 with the rest of the oxygen (O2) remaining in theexhaust gas 2, and this binds to form carbon dioxide (CO2). Fuel (HC) is supplied to the device (1), e.g., after a specified exhaust-gas back pressure is reached, and it is metered in the exhaust-gas flow until theparticle filter 4 has self-cleaned, whereby the end of the furnishing of fuel can also take place in pressure-controlled fashion. - A further development of the
device 1 is shown in FIG. 2 whereby, compared with the device in FIG. 1, it differs in that is also has a heating device 6 located on thecatalytic burner 3 and a nitrogenoxide oxidation unit 7 located between thecatalytic burner 3 and theparticle filter 4. For certain operating conditions of the engine of a vehicle, e.g., during cold starting or overrun fuel cutoff, an additional heating-up of theexhaust gas 2 can become necessary. Using the heating device 6, therefore-which is supplied with power by the electrical sources within the motor vehicle, for example, such as the battery or electric generator-reliable particle filter regeneration is ensured even under the most difficult operating conditions. Furthermore, thecatalytic burner 3 can be heated specifically if necessary using the heating device 6, so that optimal oxidation of the furnished fuel is ensured. - Nitric oxide (NO) in the
exhaust gas 2 is oxidized into nitrogen dioxide (NO2) by means of the nitrogenoxide oxidation unit 7. Advantageously, continuous combustion of the soot residue takes place in theparticle filter 4 starting at an exhaust-gas temperature of approximately 250° C. The catalytic burner is switched on only when this temperature has not been reached for an extended period of time. - The exemplary embodiment in FIG. 3 comprises—in comparison with the exemplary embodiment in FIG. 1—a coated particle filter8 in place of the
particle filter 4. The coated particle filter 8 hereby combines the nitrogenoxide oxidation unit 7 and theparticle filter 4 in FIG. 2 into one component, so that nitric oxide (NO) is oxidized into nitrogen dioxide (NO2) in the coated particle filter 8, which said nitrogen dioxide (NO2) then oxidizes the soot according to this reaction equation: 2NO+C+O2 2NO2+C2NO+CO2. A further nitrogen oxide treatment can take place downstream if necessary. Advantageously, the catalytic coating also lowers the temperature required for the direct oxidation of soot. - In the case of exhaust-gas filter systems according to the invention, the fuel for the
catalytic burner 3 can be furnished preferably in gaseous form as well as liquid form. The supply of fuel can take place periodically as well as continuously.Reference Numerals: 1 Device for exhaust treatment 2 Exhaust gas 3 Catalytic burner 4 Particle filter 5 Fuel metering device 6 Heating device 7 Nitrogen oxide oxidation unit 8 Coated particle filter
Claims (9)
1. A device (1) for exhaust treatment of an internal combustion engine, in particular a diesel internal combustion engine, having a particle filter (4), wherein the device comprises a catalytic burner (3), whereby the burner (3) is located between the internal combustion engine and the particle filter (4).
2. The device (1) according to claim 1 ,
wherein a fuel metering device (5) is located between the internal combustion engine and the burner (3).
3. The device (1) according to one of the aforementioned claims, wherein the fuel metering device (5) comprises a fuel dispersal unit.
4. The device (1) according to one of the aforementioned claims, wherein an open-loop control of the fuel metering device (5) is provided.
5. The device (1) according to one of the aforementioned claims, wherein the device (1) comprises a nitrogen oxide oxidation unit (7).
6. The device (1) according to one of the aforementioned claims, wherein the device (1) comprises a coated particle filter (8).
7. The device (1) according to one of the aforementioned claims, wherein the device (1) comprises a heating device (6).
8. A vehicle,
wherein a device (1) according to one of the aforementioned claims is provided.
9. A method for exhaust treatment of an internal combustion engine, in particular a diesel internal combustion engine, having a particle filter (4), wherein a device (1) according to one of the aforementioned claims is used.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10024254A DE10024254A1 (en) | 2000-05-17 | 2000-05-17 | Exhaust gas treatment device |
DE10024254.5 | 2000-05-17 | ||
PCT/DE2001/001806 WO2001088346A1 (en) | 2000-05-17 | 2001-05-11 | Device for treating exhaust gases |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040013579A1 true US20040013579A1 (en) | 2004-01-22 |
Family
ID=7642440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/276,468 Abandoned US20040013579A1 (en) | 2000-05-17 | 2001-05-11 | Device for treating exhaust gases |
Country Status (5)
Country | Link |
---|---|
US (1) | US20040013579A1 (en) |
EP (1) | EP1287238A1 (en) |
JP (1) | JP2003533626A (en) |
DE (1) | DE10024254A1 (en) |
WO (1) | WO2001088346A1 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005088087A1 (en) * | 2004-03-11 | 2005-09-22 | Toyota Jidosha Kabushiki Kaisha | Exhaust purifying apparatus for internal combustion engine |
WO2005088088A1 (en) | 2004-03-11 | 2005-09-22 | Toyota Jidosha Kabushiki Kaisha | Exhaust purifying apparatus and exhaust purifying method for internal combustion engine |
US20060236680A1 (en) * | 2005-04-26 | 2006-10-26 | Wenzhong Zhang | Method for regenerating a diesel particulate filter |
US20070000242A1 (en) * | 2005-06-30 | 2007-01-04 | Caterpillar Inc. | Regeneration assembly |
US20070000241A1 (en) * | 2005-06-30 | 2007-01-04 | Caterpillar Inc. | Particulate trap regeneration system and control strategy |
US20070158466A1 (en) * | 2005-12-29 | 2007-07-12 | Harmon Michael P | Nozzle assembly |
US20070228191A1 (en) * | 2006-03-31 | 2007-10-04 | Caterpillar Inc. | Cooled nozzle assembly for urea/water injection |
US20070235556A1 (en) * | 2006-03-31 | 2007-10-11 | Harmon Michael P | Nozzle assembly |
US20070240406A1 (en) * | 2006-03-21 | 2007-10-18 | Wenzhong Zhang | Low temperature diesel particulate matter reduction system |
US20110162354A1 (en) * | 2008-07-25 | 2011-07-07 | Toyota Jidosha Kabushiki Kaisha | Exhaust purification device of internal combustion engine |
US8984860B2 (en) | 2010-07-02 | 2015-03-24 | Mack Trucks, Inc. | Diesel engine and exhaust aftertreatment system and method of treating exhaust gases from a diesel engine |
EP2154344A3 (en) * | 2008-08-12 | 2016-04-27 | MAN Truck & Bus AG | Method and device for regenerating a particulate filter built into the exhaust gas tract of a combustion engine |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10344216A1 (en) * | 2003-09-22 | 2005-05-04 | Eberspaecher J Gmbh & Co | Exhaust system with particle filter and associated heating device and associated regeneration method |
JP2006274838A (en) | 2005-03-28 | 2006-10-12 | Toyota Motor Corp | Exhaust gas purifying system of internal combustion engine |
DE102006039882B3 (en) * | 2006-08-25 | 2007-12-20 | Siemens Ag | Injection system for e.g. diesel internal-combustion engine, has return pipe arranged downstream of high-pressure pump and upstream of fuel tank for recycling fuel from high-pressure pump and/or injector into fuel tank |
DE102008038720A1 (en) * | 2008-08-12 | 2010-02-18 | Man Nutzfahrzeuge Ag | Method and device for regenerating a particle filter arranged in the exhaust gas line of an internal combustion engine |
DE102010038865A1 (en) | 2010-08-04 | 2012-02-09 | Robert Bosch Gmbh | Burner with stable atomization at low back pressure |
DE102010039216A1 (en) | 2010-08-11 | 2012-02-16 | Robert Bosch Gmbh | Burner sleeve with glow plug function |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5340548A (en) * | 1990-10-08 | 1994-08-23 | Kabushiki Kaisha Riken | Exhaust gas cleaner and method of cleaning exhaust gas |
US5800790A (en) * | 1995-09-25 | 1998-09-01 | Sintokogio, Ltd. | Filter for treatment of carbon-based particles in exhaust gas and a device for said treatment using said filter |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3358392B2 (en) * | 1995-06-15 | 2002-12-16 | トヨタ自動車株式会社 | Diesel engine exhaust purification system |
DE19533355A1 (en) * | 1995-09-08 | 1997-03-13 | Wilfried Faerber | Treating exhaust gases containing e.g. soot particles |
JPH09222009A (en) * | 1996-02-15 | 1997-08-26 | Nippon Soken Inc | Exhaust particulate purifying device for internal combustion engine |
GB9621215D0 (en) * | 1996-10-11 | 1996-11-27 | Johnson Matthey Plc | Emission control |
-
2000
- 2000-05-17 DE DE10024254A patent/DE10024254A1/en not_active Ceased
-
2001
- 2001-05-11 US US10/276,468 patent/US20040013579A1/en not_active Abandoned
- 2001-05-11 WO PCT/DE2001/001806 patent/WO2001088346A1/en not_active Application Discontinuation
- 2001-05-11 JP JP2001584717A patent/JP2003533626A/en active Pending
- 2001-05-11 EP EP01947140A patent/EP1287238A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5340548A (en) * | 1990-10-08 | 1994-08-23 | Kabushiki Kaisha Riken | Exhaust gas cleaner and method of cleaning exhaust gas |
US5800790A (en) * | 1995-09-25 | 1998-09-01 | Sintokogio, Ltd. | Filter for treatment of carbon-based particles in exhaust gas and a device for said treatment using said filter |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7185488B2 (en) | 2004-03-11 | 2007-03-06 | Toyota Jidosha Kabushiki Kaisha | Exhaust purifying apparatus and exhaust purifying method for internal combustion engine |
WO2005088088A1 (en) | 2004-03-11 | 2005-09-22 | Toyota Jidosha Kabushiki Kaisha | Exhaust purifying apparatus and exhaust purifying method for internal combustion engine |
US20060196165A1 (en) * | 2004-03-11 | 2006-09-07 | Yasuhiko Otsubo | Exhaust purifying apparatus and exhaust purifying method for internal combustion engine |
WO2005088087A1 (en) * | 2004-03-11 | 2005-09-22 | Toyota Jidosha Kabushiki Kaisha | Exhaust purifying apparatus for internal combustion engine |
US7484359B2 (en) | 2004-03-11 | 2009-02-03 | Toyota Jidosha Kabushiki Kaisha | Exhaust purifying apparatus for internal combustion engine |
CN100416053C (en) * | 2004-03-11 | 2008-09-03 | 丰田自动车株式会社 | Exhaust purifying apparatus and exhaust purifying method for internal combustion engine |
KR100785751B1 (en) * | 2004-03-11 | 2007-12-18 | 도요다 지도샤 가부시끼가이샤 | Exhaust purifying apparatus for internal combustion engine |
US7861521B2 (en) | 2005-04-26 | 2011-01-04 | Donaldson Company, Inc. | Method for regenerating a diesel particulate filter |
WO2006115632A1 (en) * | 2005-04-26 | 2006-11-02 | Donaldson Company, Inc. | Method for regenerating a diesel particulate filter |
US20060236680A1 (en) * | 2005-04-26 | 2006-10-26 | Wenzhong Zhang | Method for regenerating a diesel particulate filter |
US20070000241A1 (en) * | 2005-06-30 | 2007-01-04 | Caterpillar Inc. | Particulate trap regeneration system and control strategy |
US7481048B2 (en) | 2005-06-30 | 2009-01-27 | Caterpillar Inc. | Regeneration assembly |
US7406822B2 (en) | 2005-06-30 | 2008-08-05 | Caterpillar Inc. | Particulate trap regeneration system and control strategy |
US20070000242A1 (en) * | 2005-06-30 | 2007-01-04 | Caterpillar Inc. | Regeneration assembly |
US20070158466A1 (en) * | 2005-12-29 | 2007-07-12 | Harmon Michael P | Nozzle assembly |
US7862640B2 (en) | 2006-03-21 | 2011-01-04 | Donaldson Company, Inc. | Low temperature diesel particulate matter reduction system |
US20070240406A1 (en) * | 2006-03-21 | 2007-10-18 | Wenzhong Zhang | Low temperature diesel particulate matter reduction system |
US8808418B2 (en) | 2006-03-21 | 2014-08-19 | Donaldson Company | Low temperature diesel particulate matter reduction system |
US20070235556A1 (en) * | 2006-03-31 | 2007-10-11 | Harmon Michael P | Nozzle assembly |
US20070228191A1 (en) * | 2006-03-31 | 2007-10-04 | Caterpillar Inc. | Cooled nozzle assembly for urea/water injection |
US20110162354A1 (en) * | 2008-07-25 | 2011-07-07 | Toyota Jidosha Kabushiki Kaisha | Exhaust purification device of internal combustion engine |
US8539755B2 (en) * | 2008-07-25 | 2013-09-24 | Toyota Jidosha Kabushiki Kaisha | Exhaust purification device of internal combustion engine |
EP2154344A3 (en) * | 2008-08-12 | 2016-04-27 | MAN Truck & Bus AG | Method and device for regenerating a particulate filter built into the exhaust gas tract of a combustion engine |
US8984860B2 (en) | 2010-07-02 | 2015-03-24 | Mack Trucks, Inc. | Diesel engine and exhaust aftertreatment system and method of treating exhaust gases from a diesel engine |
Also Published As
Publication number | Publication date |
---|---|
WO2001088346A1 (en) | 2001-11-22 |
JP2003533626A (en) | 2003-11-11 |
EP1287238A1 (en) | 2003-03-05 |
DE10024254A1 (en) | 2001-12-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20040013579A1 (en) | Device for treating exhaust gases | |
US5609026A (en) | Engine NOx reduction | |
JPH09503266A (en) | Method for reducing emission of harmful substances in diesel engines with post-connected oxidation catalysts | |
US8226914B2 (en) | Catalyst system and use thereof | |
US5224346A (en) | Engine NOx reduction system | |
US10738676B2 (en) | Thermal regenerator for exhaust system | |
US10934912B2 (en) | Method for the exhaust aftertreatment of an internal combustion engine and exhaust aftertreatment system | |
US8424291B2 (en) | Flame glow plug | |
EP2447494B1 (en) | Exhaust emission control device for internal combustion engine | |
US7204082B1 (en) | System for combustion of reformate in an engine exhaust stream | |
JPWO2012066606A1 (en) | Exhaust gas purification device for internal combustion engine | |
US20060053777A1 (en) | System and method for increasing the temperature of gases within an exhaust of an internal combustion engine | |
EP3584418B1 (en) | Waste gas treatment system and method for regenerating a particle filter | |
KR101058836B1 (en) | Apparatus for regeneration of diesel particulate filter and apparatus for reduction of diesel particulate matter having the same | |
JP6461585B2 (en) | Exhaust purification device | |
US20090308056A1 (en) | Procedure and device for the purification of exhaust gas | |
JP6811368B2 (en) | Exhaust temperature raising device | |
IL251356B (en) | An exhaust after treatment system for a diesel engine and gasoline engine for an improved cold start up and improved denox | |
JP2941800B1 (en) | Black smoke removal device | |
US11781466B2 (en) | Exhaust system for an internal combustion engine of a motor vehicle, drive device for a motor vehicle and motor vehicle | |
JP3520789B2 (en) | Exhaust gas purification device for internal combustion engine | |
JP2005090249A (en) | Temperature control device | |
JP2995035B2 (en) | Black smoke removal device | |
US7520125B2 (en) | Method for controlling the amount of secondary air | |
CN110500220B (en) | Method for reducing particulate emissions in the case of a cold start of an internal combustion engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ROBERT BOSCH GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCHALLER, JOHANNES;REEL/FRAME:014093/0683 Effective date: 20021115 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |