GB2363084A - Exhaust gas purification system - Google Patents
Exhaust gas purification system Download PDFInfo
- Publication number
- GB2363084A GB2363084A GB0013431A GB0013431A GB2363084A GB 2363084 A GB2363084 A GB 2363084A GB 0013431 A GB0013431 A GB 0013431A GB 0013431 A GB0013431 A GB 0013431A GB 2363084 A GB2363084 A GB 2363084A
- Authority
- GB
- United Kingdom
- Prior art keywords
- exhaust gas
- injector assembly
- atomising
- line
- pressure
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9431—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9495—Controlling the catalytic process
-
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
-
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/30—Arrangements for supply of additional air
-
- 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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
-
- 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
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Toxicology (AREA)
- General Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
An exhaust gas purification system (10) for treating exhaust gas from the internal combustion engine of a motor vehicle. There is provided an air assisted injector mounted (12) on an exhaust line (14) upstream of a catalytic converter (15), for injecting atomised purification agent such as urea (16) into the exhaust line. Purification agent such as urea (16) is provided to the injector from a pressure tank (24). Air is provided to air inlet (42) of the injector by an air pump (32). The pump is also connected to the pressure tank (24), so that in use the air pump causes the purification agent such as urea (16) to be fed to the injector assembly (12) under pressure. This removes the need for an additional pump to pump purification agent to the injector.
Description
2363084 Exhaust Gas Purification System The present invention relates to
an exhaust gas purification system for treating exhaust gas from the 5 internal combustion engine of a motor vehicle, in particular for lowering the quantity of nitrogen oxides in the exhaust gas.
To reduce the detrimental ef f ect of motor vehicle exhaust 10 gases on the environment, it is now standard practice to include a catalytic converter in the exhaust line of the vehicle in order to cause harmful or toxic components of the exhaust gas to react and form less harmful gases.
is Particularly harmful gases include nitrogen oxides (Nox) To reduce the concentration of NOx in the exhaust gas, it is known from patent document US 5 540 047 for example to introduce urea into the exhaust line, upstream of the catalytic converter. Due to the heat of the exhaust gas,.
20 the urea breaks down into ammonia, which acts as a reducing agent and in the presence of the catalyst in the catalytic converter, converts the NOx to nitrogen, carbon dioxide and water, which are harmless substances.
25 In EP 0 849 443, a solution of urea dissolved in water is introduced into the exhaust line as an atomised spray by pumping the urea solution through an injector with a pump.
To assist in atomising the urea solution, the injector has an air inlet into which compressed air is pumped using 30 another pump. However the use of two pumps increases the weight, complexity and cost of such an exhaust purification system.
It is an object of this invention to address the above c issues.
According to one aspect of the present invention, there is provided an exhaust gas purification system for a motor 5 vehicle exhaust comprising:
a) an exhaust line having a catalytic converter; b) an injector assembly mounted on the exhaust line 10 upstream of the catalytic converter for injecting atomised purification agent into the exhaust line, the injector assembly having a first inlet for receiving exhaust gas purification agent and a second inlet for receiving atomising gas for atomising the purification agent; is c) a container having a pressure chamber for holding the exhaust gas purification agent, wherein the pressure chamber is connected to the first inlet of the injector assembly by a first feed line; and d) a pressurised source of atomising gas connected to the second inlet of the injector assembly by a second feed line; characterised in that the pressurised source of atomising gas is connected to the pressure chamber of the container by a pressure line, such that in use the pressurised source of atomising gas causes the purification agent to be fed to the injector assembly under pressure.
Because the pressurised source of atomising gas is used connected to the pressure chamber, an additional pump for pressuring the pressure chamber is not needed.
35 Preferably, the purification agent will be a liquid. The pressure chamber will preferably have a ullage space above the liquid level and the pressure line will be connected to the ullage space of the pressure chamber, so that the ullage space can be pressurised with the pressurised 5 source of atomising gas. The pressure chamber may be in communication with a gas accumulator tank in order to accommodate pressurised gas if the ullage space is small.
The pressurised source of atomising gas will preferably be 10 provided by an air pump having an inlet open to the atmosphere. This will be more convenient and cost effective than using a canister of compressed gas.
However, the pressurised source of air may be provided by an engine turbo instead.
is The purification agent will preferably be urea dissolved in water. The urea will then break down into ammonia which will react with Nox in the exhaust gas in order to produce less harmful gases.
The injector assembly will preferably be of the air assisted type, comprising an atomising chamber into which at least partially atomised liquid can be injected, an inner nozzle for injecting liquid into the atomising 25 chamber, and an air injector for injecting air into the atomising chamber. The air injected into the atomising chamber will help to further atomise the liquid injected therein.
30 In order to control the pressure of air injected into the atomising chamber, and hence the flow rate of injected purification agent, a pressure controller for controlling pressure in a gas line connecting the source of atomising gas to the injector assembly may be provided. The pressure 35 controller will preferably have one or more inputs for receiving control signals from an engine management system, so that the pressure of atomising gas at the second inlet of the injector assembly may be controlled as a function of engine parameters. This will allow the 5 amount of purification agent injected into the exhaust gas to be controlled according to engine parameters so as to improve the efficiency of the purification system.
However, in a preferred embodiment, the injector assembly 10 will be electronically controlled, and theinner nozzle will have an electrical valve for controlling the rate at which purification agent is injected. The electrical valve will preferably have at least one input in order to receive a control signal from an engine management system, is so that the injection rate of purification agent can be,controlled by the engine management system. The electrical valve may receive the control signal directly from the engine management system, or via an actuator, which will convert the signal from the engine management 20 system into an actuating signal to operate the electrical valve.
According to another aspect of the present invention, there is provided a method of purifying the exhaust gas of 25 a motor vehicle, using apparatus comprising: an exhaust line having a catalytic converter; an injector assembly mounted on the exhaust line upstream of the catalytic converter, the injector assembly having a first inlet and a second inlet; a container having a pressure chamber for 30 holding exhaust gas purification agent, wherein the pressure chamber is connected to the first inlet of the injector assembly by a first feed line; and a pressurised source of atomising gas connected to the second inlet of the injector assembly by a second feed line, characterised 35 in that the method comprises the step of pressuring the pressure chamber of the container with the pressurised source of atomising gas in order to feed purification agent to the injector assembly under pressure.
5 The invention will now be further described by way of example, with reference to the accompanying drawing in which:
Figure 1 shows an exhaust gas purification system 10 according to one embodiment of the invention; Figure 2 shows another embodiment of an exhaust gas purification system; 15 Figure 3 is a schematic representation of the injector assembly of Figures 1 and 2; and Figure 4 shows a schematic representation of an inner injector in one embodiment of the injector 20 assembly of Figure 3.
In Figure 1, an exhaust gas purification system 10 is shown where an injector assembly 12 is mounted an an exhaust line 14, upstream of a selective catalytic 25 converter 15 in the exhaust line 14. A purification agent, here an aqueous solution of urea 16, is injected by the injector assembly 12 into the exhaust line 14, where the urea decomposes into ammonia and carbon dioxide under the heat of the exhaust gas. The ammonia is carried by 30 the exhaust flow in the direction of the arrow 22 and reaches the catalytic converter 15, where it reacts with nitrogen oxide (NOx) to form nitrogen gas and water, which are harmless.
35 The urea solution 16 is stored in the chamber 27 of a container 24 and is fed to the injector assembly 12 by a liquid feed line 26 connected at one end to a feed inlet 28 of the injector 12, and at the other end to the chamber 27.
The chamber 27 has an ullage space 18 above the liquid level 30 of the urea solution 16. During use, the ullage space 30 is filled with compressed air that is pressurised by an air pump 32 whose inlet 34 is in communication with 10 the atmosphere, via an air filter 35. The pump outlet 36 is connected to the ullage space 18 of the chamber 27 by a pressure line 38. The compressed air in the ullage space 18 due to the air pump 32, typically about 1 bar, forces urea solution out of the injector assembly 12 and into the is exhaust line 14.
The urea solution 16 is injected into the exhaust line 14 as a f ine spray 20, also known as an atomised spray. To help make the spray sufficiently fine, compressed air from 20 the air pump 32 is fed into the injector assembly 12. The compressed air provided by the air pump 32 is fed to the injector assembly 12 by an air line 40 connected at one end to an air inlet 42 on the injector assembly 12. At the other end the air line 40 is in communication with the 25 pump outlet 36.
The injector assembly 12 is shown in more detail in the schematic representation of Figure 3. The injector assembly, also known as an air assisted injector, has an 30 atomising chamber 60 into which liquid spray is injected by an inner injector 63 having an inner nozzle 62. The inner nozzle 62 is fed by the feed inlet 28. Air from the air inlet 42 is also injected into the atomising chamber, through an air injector 43. The injected air assists in 35 the formation of the finely atomised spray 20 expelled _c from an exit nozzle 64 in the atomising chamber 6o and into the exhaust line 14.
The flow rate of urea solution 16 out of the injector assembly 12 is dependent in part on the difference between the pressure at the feed inlet 28 and the pressure at the air inlet 42 of the injector assembly 12. A pressure regulator 44 is mounted in the air line 40 to ensure that the pressure at the air inlet 42 of the injector assembly 10 12 is less than the liquid pressure at the feed inlet 28, thereby reducing the risk that a back f low of air will occur up the feed line 26.
A pressure controller 46 can optionally be provided to control the pressure in the air line 40 as a function of engine parameters. The pressure controller 46 is connected to an engine management system 48, and receives control signals 50 from the engine management system 48 representative of engine parameters... such as engine speed 20 or load. In order to control the pressure in the air line as a function of the received control signals 50, the pressure controller 46 is electrically connected to the pump 32. The pump 32 is adapted to receive a pump control signal 55 from the pressure controller 46 and to generate 25 a pressure that is dependent on the pump control signal 55.
A non return valve 52 can also optionally be provided in the air line, to reduce the risk that vapour from the urea 30 solution will escape through the air line 40, which would allow.the urea solution to evaporate. Such a non return valve will also act to cause a drop in pressure in the air line.
In the embodiment shown in Figure 1, the pressure S regulator 44 may also be controlled by the engine management system 48 in order to better control the pressure in air line 40.
5 When the air pump 32 is turned off, the pressure in the chamber 27 will remain for some time, until the pressurised air in the ullage space 18 has expanded sufficiently such that it reaches atmospheric pressure. The expansion of the air in the ullage space 18 after the 10 pump has been turned off will force at least some urea solution out of the injector assembly, thereby reducing the risk of blocking in the injector assembly 12 if some of the urea solution evaporates.
is In a preferred embodiment shown in Figures 2 and 4, the inner inj ector 63 of the injector assembly 12 is electrically controlled by an electrical valve 65 in response to an electrical signal 50 from an engine management system 48. This allows the rate at which 20 purification agent is injected into the exhaust line 14 to be controlled as a function of engine parameters in order to improve the efficiency of the exhaust purification system.
25 The injector assembly 12 has an electrical actuator 67 which receives the electrical control signal 50 from the engine management system 46 and produces a representative signal, here a duty cycle 51, that is fed to the electrical valve 65.
The inner injector 63, here of the gasoline type, is shown in more detail in Figure 4. The electrical valve 65 in this example is a solenoid valve, which repeatedly opens and closes in a cyclic manner according to the electrical 35 duty cycle 51 applied to it. The rate of injected purification agent is governed by the amount of time the valve remains open during each cycle.
In the embodiment of Figure 2, the pressure regulator 5 controls the air pressure in both the air line 40 and the pressure line 38, so that the rate of injected purification agent depends mainly on the electrical control signal 50 applied to the injector assembly. However, to allow the injection rate of purification agent 10 to be better controlled, the pump 32 and/or the regulator 44 may also be controlled by the engine management system 48.
As it will be appreciate from the above description, the is invention described above provides a simple and cost effective system for purifying the exhaust gas of a motor vehicle using just a single pump.
Claims (12)
1. An exhaust gas purification system (10) for a motor vehicle exhaust comprising:
a) an exhaust line (14) having a catalytic converter(15); b) an injector assembly (12) mounted on the exhaust line (14) upstream of the catalytic converter (15) for 10 injecting atomised purification agent (20) into the exhaust line (14), the injector assembly (12) having a first inlet (28) for receiving exhaust gas purification agent (16) and a second inlet (42) for receiving atomising gas for atomising the purification agent; is c) a container (24) having a pressure chamber (27) for holding the exhaust gas purification agent (16), wherein the pressure chamber (27) is connected to the first inlet (28) of the injector assembly (12) by a first feed 20 line(26); and d) a pressurised source of atomising gas (32) connected to the second inlet (42) of the injector assembly by a second feed line (40); characterised in that the pressurised source of atomising gas (32) is connected to the pressure chamber of the container (24) by a pressure line (38), such that in use the pressurised source of atomising gas causes the 30 purification agent to be fed to the injector assembly under pressure.
2. An exhaust gas purification system (10) as claimed in Claim 1, wherein the purification agent (18) is a liquid.
3. An exhaust gas purification system (10) as claimed in Claim 2, wherein the pressure chamber (27) has an ullage space (18) above the liquid level and wherein the pressure line (38) is connected to the ullage space.
4. An exhaust gas purification system (10) as claimed in any one of the preceding claims, wherein the pressurised source of atomising gas (32) is provided by an air pump (32) having an inlet (34) open to the atmosphere.
5. An exhaust gas purification system (10) as claimed in any one of Claims 2 to 4, wherein the purification agent (16) is urea dissolved in water.
is
6. An exhaust gas purification system (10) as claimed in any one of the preceding claims, wherein. the injector assembly (12) comprises an atomising chamber (60) into which at least partially atomised liquid can be injected, an inner nozzle (62) for injecting liquid into the 20 atomising chamber (60), and an air injector (43) for injecting air into the atomising chamber.
7. An exhaust gas purification (10) system as claimed in any one of the preceding claims, wherein a pressure 25 controller (46) is provided for controlling pressure in a gas line connecting the source of atomising gas to the injector assembly.
8. An exhaust gas purification system (10) as claimed in 30 Claim 7, wherein the pressure controller (46) has one or more inputs for receiving control signals from an engine management system (48).
9. An exhaust gas purification (10) system as claimed in 35 Claim 6, wherein the inner nozzle (63) has an electrical - 12 valve (65) for controlling the rate at which purification agent is injected, and wherein the electrical valve has at least one input for receiving a control signal (51) from an engine management system.
10. A method of purifying the exhaust gas of a motor vehicle, using apparatus comprising: an exhaust line (14) having a catalytic converter(15); an injector assembly (12) mounted on the exhaust line upstream of the catalytic 10 converter, the injector assembly having a first inlet (28) and a second inlet (42); a container (24) having a pressure chamber (27) for holding exhaust gas purification agent (18), wherein the pressure chamber is connected to the first inlet of the injector assembly by a first feed is line (26); and a pressurised source of atomising gas connected to the second inlet of the injector assembly by a second feed line (40), characterised in that the method comprises the step of pressuring the pressure chamber (27) of the container with the pressurised source of atomising 20 gas (3 2) in order to feed purification agent to the injector assembly under pressure.
11. An exhaust gas purification system (10) substantially as herein described with reference to the accompanying 25 drawings.
12. A method of purifying the exhaust gas of a motor vehicle substantially as herein described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0013431A GB2363084A (en) | 2000-06-05 | 2000-06-05 | Exhaust gas purification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0013431A GB2363084A (en) | 2000-06-05 | 2000-06-05 | Exhaust gas purification system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0013431D0 GB0013431D0 (en) | 2000-07-26 |
| GB2363084A true GB2363084A (en) | 2001-12-12 |
Family
ID=9892860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0013431A Withdrawn GB2363084A (en) | 2000-06-05 | 2000-06-05 | Exhaust gas purification system |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2363084A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2449499A (en) * | 2006-06-19 | 2008-11-26 | Ford Global Tech Llc | A method for venting a vehicle emissions treatment system |
| WO2008104778A3 (en) * | 2007-02-28 | 2008-12-24 | Scion Sprays Ltd | A control system for a lubrication system in an internal combustion engine |
| EP2199557A1 (en) * | 2008-12-17 | 2010-06-23 | Continental Automotive GmbH | Removal device of an aqueous urine solution in a motor vehicle |
| CN102116186A (en) * | 2010-07-21 | 2011-07-06 | 苏州派格力减排系统有限公司 | Gas-liquid stirring and mixing device of urea solution metering injection system |
| ITMI20101476A1 (en) * | 2010-08-03 | 2012-02-04 | Ecospray Technologies S R L | APPARATUS AND METHOD FOR THE REGENERATION OF PARTICULATE FILTERS FOR INTERNAL COMBUSTION ENGINES |
| CN101712277B (en) * | 2009-09-27 | 2013-07-24 | 无锡市凯龙汽车设备制造有限公司 | Integrated exhaust system based on SCR and ETR for energy saving and emission reduction of commercial vehicles |
| WO2013189660A1 (en) * | 2012-06-22 | 2013-12-27 | Robert Bosch Gmbh | Metering system for introducing a reducing agent into an exhaust conduit of an internal combustion engine |
| CN103790680A (en) * | 2014-02-21 | 2014-05-14 | 武汉添蓝发动机排放控制技术有限公司 | AdBlue filling system driven by compressed air |
| US10273848B2 (en) | 2016-09-14 | 2019-04-30 | Caterpillar Inc. | Reductant delivery system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10378415B2 (en) * | 2017-08-30 | 2019-08-13 | Caterpillar Inc. | Diagnostic and mitigation strategy for reductant injector obstruction in exhaust system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0555746A1 (en) * | 1992-02-10 | 1993-08-18 | Man Nutzfahrzeuge Ag | Device for catalytic NOx reduction |
| US5605042A (en) * | 1994-10-12 | 1997-02-25 | Robert Bosch Gmbh | Arrangement for the aftertreatment of exhaust gases |
| EP0849443A1 (en) * | 1996-12-20 | 1998-06-24 | Robert Bosch Gmbh | Mixture delivery device |
| US5943858A (en) * | 1995-05-19 | 1999-08-31 | Siemens Aktiengesellschaft | Premixing chamber for an exhaust gas purification system |
-
2000
- 2000-06-05 GB GB0013431A patent/GB2363084A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0555746A1 (en) * | 1992-02-10 | 1993-08-18 | Man Nutzfahrzeuge Ag | Device for catalytic NOx reduction |
| US5605042A (en) * | 1994-10-12 | 1997-02-25 | Robert Bosch Gmbh | Arrangement for the aftertreatment of exhaust gases |
| US5943858A (en) * | 1995-05-19 | 1999-08-31 | Siemens Aktiengesellschaft | Premixing chamber for an exhaust gas purification system |
| EP0849443A1 (en) * | 1996-12-20 | 1998-06-24 | Robert Bosch Gmbh | Mixture delivery device |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2449499A (en) * | 2006-06-19 | 2008-11-26 | Ford Global Tech Llc | A method for venting a vehicle emissions treatment system |
| CN101627187B (en) * | 2007-02-28 | 2012-07-18 | 赛昂喷雾有限公司 | An injection system for an internal combustion engine |
| WO2008104778A3 (en) * | 2007-02-28 | 2008-12-24 | Scion Sprays Ltd | A control system for a lubrication system in an internal combustion engine |
| US8051826B2 (en) | 2007-02-28 | 2011-11-08 | Scion-Sprays Limited | Injection system for an internal combustion engine |
| EP2199557A1 (en) * | 2008-12-17 | 2010-06-23 | Continental Automotive GmbH | Removal device of an aqueous urine solution in a motor vehicle |
| CN101712277B (en) * | 2009-09-27 | 2013-07-24 | 无锡市凯龙汽车设备制造有限公司 | Integrated exhaust system based on SCR and ETR for energy saving and emission reduction of commercial vehicles |
| CN102116186A (en) * | 2010-07-21 | 2011-07-06 | 苏州派格力减排系统有限公司 | Gas-liquid stirring and mixing device of urea solution metering injection system |
| EP2415982A1 (en) * | 2010-08-03 | 2012-02-08 | Ecospray Technologies S.r.l. | Apparatus and method for regenerating particulate filters for internal combustion engines |
| ITMI20101476A1 (en) * | 2010-08-03 | 2012-02-04 | Ecospray Technologies S R L | APPARATUS AND METHOD FOR THE REGENERATION OF PARTICULATE FILTERS FOR INTERNAL COMBUSTION ENGINES |
| WO2013189660A1 (en) * | 2012-06-22 | 2013-12-27 | Robert Bosch Gmbh | Metering system for introducing a reducing agent into an exhaust conduit of an internal combustion engine |
| CN103790680A (en) * | 2014-02-21 | 2014-05-14 | 武汉添蓝发动机排放控制技术有限公司 | AdBlue filling system driven by compressed air |
| CN103790680B (en) * | 2014-02-21 | 2016-08-24 | 武汉添蓝发动机排放控制技术有限公司 | A kind of compressed air-driven add blue loading system |
| US10273848B2 (en) | 2016-09-14 | 2019-04-30 | Caterpillar Inc. | Reductant delivery system |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0013431D0 (en) | 2000-07-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100484613C (en) | Flash injector for ammonia selective catalysis reduction nitrogen oxide aftertreatment process | |
| US8359833B2 (en) | Method for introducing a reductant into an exhaust stream | |
| US7877982B2 (en) | Device and method for aftertreating exhaust gases | |
| KR100628666B1 (en) | Secondary treatment device for the exhaust gases of an internal combustion engine | |
| US20060196172A1 (en) | Injection device for the treatment of exhaust fumes from motor vehicles | |
| CN100432385C (en) | Exhaust gas purification apparatus of engine | |
| US20050252201A1 (en) | Method and apparatus for reducing NOx emissions | |
| EP1612381B1 (en) | Device and method for injecting a liquid into a gas stream, and vehicle exhaust gas treatment system incorporating the device | |
| WO1998051402A8 (en) | Method and device for reducing nitrogen oxides in an scr catalyst | |
| KR20090123975A (en) | Exhaust purification device for engine | |
| WO2014143851A1 (en) | Pump purge for urea dosing system | |
| US9140166B1 (en) | Reductant dosing system | |
| GB2363084A (en) | Exhaust gas purification system | |
| CN104564256A (en) | Purge system for reductant delivery unit for selective catalytic reduction system | |
| GB2449499A (en) | A method for venting a vehicle emissions treatment system | |
| CN105545423A (en) | Urea jet system without air-assisted atomization and control method of atomized urea jet system | |
| US9267411B2 (en) | Pressurized tank vehicular fluid delivery system | |
| US9163542B2 (en) | Reducing agent dosing system for injection reducing agent into the exhaust gas flow of an internal combustion engine | |
| KR101556330B1 (en) | Urea feeding system for scr system | |
| JPH06146873A (en) | On-vehicle hydrogen supply device | |
| WO2006061943A1 (en) | Exhaust gas purification apparatus | |
| GB2357047A (en) | Exhaust gas purification system | |
| KR101461875B1 (en) | Exhaust gas purification device | |
| WO2017053362A1 (en) | Emission reduction system | |
| KR100663659B1 (en) | Method for dosing a reducing agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |