WO2008133122A1 - 内燃機関の排気浄化装置 - Google Patents
内燃機関の排気浄化装置 Download PDFInfo
- Publication number
- WO2008133122A1 WO2008133122A1 PCT/JP2008/057370 JP2008057370W WO2008133122A1 WO 2008133122 A1 WO2008133122 A1 WO 2008133122A1 JP 2008057370 W JP2008057370 W JP 2008057370W WO 2008133122 A1 WO2008133122 A1 WO 2008133122A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- urea water
- abnormal
- determined
- water supply
- purification rate
- Prior art date
Links
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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the exhaust apparatus
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
-
- 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
- F01N3/2066—Selective catalytic reduction [SCR]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/50—Zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
-
- 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
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/03—Monitoring or diagnosing the deterioration of exhaust systems of sorbing activity of adsorbents or absorbents
-
- 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
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/05—Systems for adding substances into exhaust
-
- 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
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1818—Concentration of the reducing agent
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the present invention relates to an exhaust emission control device for an internal combustion engine.
- a NO x selective reduction catalyst is placed in the engine exhaust passage, a urea water supply valve is placed in the engine exhaust passage upstream of the N0 x selective reduction catalyst, and ammonia generated from the urea water supplied from the urea water supply valve by the exhaust of an internal combustion engine which is adapted to selectively reduce that Ru NO x that contained in the gas, ⁇ 0) (selection selective reduction of the original catalyst inlet and outlet respectively NO x by placing sensors in these N_ ⁇ x sensor seeking N_ ⁇ x reduction rate by N_ ⁇ x selective reduction catalyst from the output value, N_ ⁇ when the drops than NO x reduction rate range in which the output value from the obtained NO x reduction ratio predetermined for N_ ⁇ x sensor determines that there is an abnormality in the x selective reduction catalyst, abnormal N_ ⁇ x sensor when it exceeds N_ ⁇ x reduction ratio range N_ ⁇ x reduction ratio predetermined determined from the output value of the N_ ⁇ x sensor
- An internal combustion engine in which it is determined that there is an engine is
- An object of the present invention is Rukoto to provide an exhaust gas purification system of an internal combustion engine that can determine Nyu_ ⁇ ⁇ selective reduction catalyst, an abnormality of the urea water supply system and the urea water.
- Nyu_ ⁇ chi selective reduction catalyst in the engine exhaust passage disposed urea water supply valve to the New Omicron chi selective reduction catalyst in the engine exhaust passage upstream of the supply urea from the urea water supply valve in the exhaust purification system of an internal combustion institution which is adapted to selectively reduce Nyu_ ⁇ ⁇ of the ammonia generated from the water contained in the exhaust gas, Nyu_ ⁇ ⁇ for detecting the Nyu_ ⁇ ⁇ purification rate by Nyu_ ⁇ ⁇ selective reduction catalyst and purification rate detecting means, and urine Motomi supply amount detecting means for detecting a supply amount of urea water, which comprises a urea aqueous concentration detection means to detect the concentration of the urea water, these Nyu_ ⁇ ⁇ purification rate detecting means , urea water supply amount detection means and the urea water concentration detection means according to the detection result to Nyu_ ⁇ ⁇ selective reduction catalyst based on an exhaust purifying apparatus for an internal combustion engine which is adapted to determine an
- FIG. 1 is an overall view of a compression ignition internal combustion engine
- Fig. 2 is an overall view showing another embodiment of the compression ignition internal combustion engine
- Fig. 3 is a flow chart for detecting an abnormality
- Fig. 4 is a diagram of the urea water supply system.
- FIG. 5 is a flowchart for determining an abnormality in the urea water supply system
- FIG. 6 is a flowchart for determining an abnormality in the urea water.
- Figure 1 shows an overall view of a compression ignition type internal combustion engine.
- 1 is an engine body
- 2 is a combustion chamber of each cylinder
- 3 is an electronically controlled fuel injection valve for injecting fuel into each combustion chamber
- 4 is an intake manifold
- 5 is an exhaust manifold. Respectively.
- the inlet 4 is connected to the outlet of the compressor 7 a of the exhaust turbocharger 7 via the intake duct 6, and the inlet of the compressor 7 a is connected to the air cleaner 9 via the intake air amount detector 8.
- a throttle valve 10 driven by a step motor is arranged in the intake duct 6, and a cooling device 1 for cooling intake air flowing in the intake duct 6 around the intake duct 6. 1 is placed.
- the engine cooling water is guided into the cooling device 11 and the intake air is cooled by the engine cooling water.
- the exhaust manifold 5 is connected to the inlet of the exhaust evening bin 7 b of the exhaust turbocharger 7, and the outlet of the exhaust evening bin 7 b is connected to the inlet of the oxidation catalyst 12.
- a particulate fill 1 3 is arranged adjacent to the oxidation catalyst 1 2 to collect particulate matter contained in the exhaust gas.
- the outlet of this particulate filter 1 3 Is connected to the inlet of the NO x selective reduction catalyst 15 via the exhaust pipe 14.
- An oxidation catalyst 16 is connected to the outlet of the NO x selective reduction catalyst 15.
- Urea water supply valve 1 7 is arranged in the upstream exhaust pipe 1 4. This urea water supply valve 1 7 is connected to the urea water tank through the supply pipe 1 8 and the supply pump 1 9. 2 Connected to 0.
- urea water supply amount detection means for detecting the supply amount of urea water for example, a flow meter 21 is disposed, and in the urea water tank 20, urea water concentration detection for detecting the concentration of urea water Means, for example, a urea concentration sensor 22 is arranged.
- the urea water stored in the urea water tank 20 is injected into the exhaust gas flowing through the exhaust pipe 14 from the urea water supply valve 17 by the supply pump 19 and ammonia generated from the urea water ((NH 2 ) 2 C ⁇ + H 2 ⁇ ⁇ 2 NH 3 + C ⁇ 2 ), NO x contained in the exhaust gas is reduced in the NO x selective reduction catalyst 15.
- the exhaust manifold 5 and the intake manifold 4 are connected to each other via an exhaust gas recirculation (hereinafter referred to as EGR) passage 23, and an electronically controlled EGR control valve 24 is disposed in the EGR passage 23. Further, a cooling device 25 for cooling the EGR gas flowing in the EGR passage 23 is disposed around the EGR passage 23.
- each fuel injection valve 3 is connected to a common rail 27 via a fuel supply pipe 26, and this common rail 27 is connected to a fuel tank 29 via an electronically controlled variable discharge fuel pump 28. Is done.
- the fuel stored in the fuel tank 29 is supplied to the common rail 27 by the fuel pump 28, and the fuel supplied to the common rail 27 is connected to the fuel injection valve 26 via each fuel supply pipe 26. Supplied to 3.
- the electronic control unit 30 consists of a digital computer and is connected to each other by a bidirectional bus 3 1 RM (read only memory) 3 2, RAM (random access memory) 3 3, CPU (microphone port) Processor) 3 4, Input port 3 5 and Output port 3 6 N_ ⁇ for detecting N_ ⁇ x purification rate detecting means downstream of the oxidation catalyst 1 6 for detecting the NO x purification rate by the the NO x selective reduction catalyst 1 5, for example, the NO x concentration in the exhaust gas x sensor 3 9
- the output signals of the flow meter 21, urea concentration sensor 2 2, NO x sensor 2 9 and intake air amount detector 8 are input ports 3 5 through corresponding AD converters 3 7, respectively. Is input.
- the accelerator pedal 40 is connected to a load sensor 41 that generates an output voltage proportional to the depression amount L of the accelerator pedal 40, and the output voltage of the load sensor 41 is connected to the corresponding AD converter 37.
- a crank angle sensor 42 that generates an output pulse every time the crankshaft rotates, for example, 15 ° is connected to the input port 35.
- output port 3 6 is supported Connected to the fuel injection valve 3 and throttle valve 10 0 through the drive circuit 3 8 to drive, the urea water supply valve 1 7, the supply pump 1 9, the EGR control valve 2 4 and the fuel pump 2 8 Is done.
- the oxidation catalyst 1 2 carries a example a noble metal catalyst such as platinum, the oxidation catalyst 1 2 oxidizes the HC contained in the exhaust gas and the working to convert NO contained in the exhaust gas N_ ⁇ 2 It works. That is, N_ ⁇ 2 has a strong oxidizing than N_ ⁇ , therefore NO oxidation reaction of the captured particulate matter is promoted on the Patikyure Tofiru evening 1 3 when converted to N_ ⁇ 2, also N_ ⁇ x The reduction action by ammonia on the selective reduction catalyst 15 is promoted.
- a particulate fill that does not carry a catalyst can be used, or a particulate fill that carries a precious metal catalyst such as platinum can be used.
- the NO x selective reduction catalyst 15 can be composed of an ammonia adsorption type Fe zeolite that has a high NO x purification rate at low temperatures, or a titania / vanadium catalyst that does not have an ammonia adsorption function. It can also be configured.
- the oxidation catalyst 1 6 carries a precious metal catalyst, such as of platinum, the oxidation catalyst 1 6 an action for oxidation of ammonia leaked from N_ ⁇ x selective reduction catalyst 1 5.
- Fig. 2 shows another embodiment of a compression ignition type internal combustion engine.
- a level sensor 43 for detecting the level of the urea water level in the urea water tank 20 is provided as a urea water supply amount detecting means for detecting the supply amount of the urea water.
- the particulate filter 13 is arranged downstream of the oxidation catalyst 16, and therefore, in this embodiment, the outlet of the oxidation catalyst 1 2 is connected to the NO x selective reduction catalyst 1 5 via the exhaust pipe 14. It is connected to the entrance.
- N0 x purification rate Typical be degraded is a case where N_ ⁇ x selective reduction catalyst 1 5 is deteriorated.
- NO x N_ ⁇ x concentration in the exhaust gas flowing out selective reduction catalyst 1 5 deteriorates from N_ ⁇ x selective reduction catalyst 1 5 increases, as a result ⁇ ⁇ !! sensor 3 9 output level becomes higher. Therefore NO x sensor 3 9 N_ ⁇ x selective reduction catalyst 1 5 from the output level can and child determines whether degraded.
- the NO x selective reduction catalyst 15 is not deteriorated, the NO x purification rate may decrease due to other causes. In this case as well, the output level of the NO x sensor 39 increases. Therefore, it cannot be immediately judged that the NO x selective reduction catalyst 15 has deteriorated just because the output level of the N0 x sensor 3 9 has become high.
- N0 x purification rate There are two possible causes for the decrease in N0 x purification rate other than the deterioration of N0 x selective reduction catalyst 15.
- One cause is, for example, clogging of the urea water supply valve 17, clogging or damage of the supply pipe 18, or deterioration or failure of the supply pump 19, that is, urea water supply due to a malfunction of the urea water supply system. This is a case where the supply amount is reduced with respect to the regular amount. If the supply amount of urea water decreases, N0 x cannot be fully purified, and 1 ⁇ 0 ! (The purification rate decreases.
- Another cause is a decrease in the concentration of urea water due to unauthorized use of liquids other than urea water or for any other reason.
- concentration of urea water decreases, NO x purification rate decreases because NO x cannot be fully purified.
- the NO x selective reduction catalyst 15 deteriorates, that is, becomes abnormal
- the supply amount of urea water decreases, that is, even if the supply system of urea water becomes abnormal
- the urea water also decreases the concentration, i.e., the urea water is reduced even the NO x purification rate abnormally summer.
- N0 x purification rate in order to find out the cause of the decrease in N0 x purification rate, First, it is determined whether or not the NO x purification rate has decreased, that is, whether or not the N0 x purification rate is abnormal. This is because when N0 x purification rate is not abnormal, N0 x selective reduction catalyst, urea water supply system and urea water are all considered to be normal, and therefore the cause of the abnormality needs to be determined at this time. Because there is no.
- N_ ⁇ x purification rate to have abnormally summer is the NO x selective reduction catalyst 1 5 when it is determined that the urea water supply system is also abnormal when N_ ⁇ x purification rate is determined to be abnormal do has become abnormal, walk do not know what N_ ⁇ x purification rate is such one abnormal to the urea water supply system is in an abnormal. Therefore, in this case, the urea water supply amount is increased or decreased so that the urea water supply amount becomes a normal supply amount. At this time, if the NO x purification rate is no longer abnormal, the urea water supply system is abnormal. It is determined that there is.
- the urea water is also N_ ⁇ x purification rate for the NO x selective reduction catalyst 1 5 is a One abnormal when it is determined that the abnormal when N_ ⁇ x purification rate is determined to be abnormal I don't know if it is abnormal, or whether the N0 x purification rate is abnormal due to abnormal urea water. Therefore, in this case, the urea water supply amount is increased or decreased so that the urea supply amount becomes a normal supply amount, and if the NO x purification rate is no longer abnormal at this time, it is determined that the urea water is abnormal. I try to do it.
- This abnormality detection routine is executed at least once during vehicle operation. It is.
- N_ ⁇ x whether the sensor 3 9 N_ ⁇ x purification rate from the output value of the drops below a predetermined level, i.e. either N_ ⁇ x purification rate is abnormal not Is determined.
- the processing cycle is ended when N_ ⁇ x purification rate is not abnormal.
- N_ ⁇ x selective reduction catalyst 1 5 at this time, all of the urea water supply system and the urea water is determined to Ru normal der.
- step 51 it is determined whether there is an abnormality in the urea water supply system.
- a first embodiment of this urea water supply system abnormality determination routine is shown in FIG. 4, and a second embodiment is shown in FIG.
- step 70 the normal flow rate W fl of urea water is calculated from the supply amount of urea water determined according to the operating state of the engine.
- step 71 the actual urea water flow rate W is detected from the output signal of the flow meter 21 shown in FIG.
- step 72 the actual urea water flow rate W is W o _ ( ⁇ is a small constant value) and W. It is determined whether it is between + ⁇ , that is, whether it is within an acceptable range that is considered normal.
- W 0-a ⁇ W ⁇ W Q + ⁇ the routine proceeds to step 73 and is determined to be normal.
- step 72 W fl -a ⁇ W or W ⁇ W.
- the routine proceeds to step 74 and it is judged that there is an abnormality in the urea water supply system.
- step 75 the urea water flow rate is set to the normal flow rate W.
- the abnormality determination routine of the urea water supply system shown in Fig. 5 is executed by interruption at regular intervals.
- step 80 it is judged if the initial value of the urea amount in the urea water tank 20 has been detected.
- the routine proceeds to step 81 and the urea water amount W in the urea water tank 20 is detected by the level sensor 43 shown in FIG.
- step 82 the integrated value ⁇ Q of the urea water supply amount Q determined according to the operating state of the engine is calculated.
- step 83 it is determined whether or not the integrated value ⁇ Q of the urea water supply amount has exceeded the set value QX.
- the routine proceeds to step 84, where the urea water amount W2 in the urea water tank 20 is detected.
- step 85 the actual consumption of urea water — W 2 is between ⁇ Q—; 8 (i8 is a small constant value) and ⁇ Q + j8, that is, it is normal. It is determined whether it is within a possible tolerance range.
- ⁇ Q — jS W, — When W 2 ⁇ Q +) 8 proceed to Step 86 and judge that it is normal.
- Step 8 7 when when it is determined that 8 is abnormal urea water supply system proceeds to Step 8 7 To be judged.
- the increase rate of urea water necessary for setting the supply amount of urea water to a normal supply amount, and in some cases the decrease rate ( ⁇ Q / (W,-W 2 )) are calculated.
- step 51 it is determined by the routine shown in FIG. 4 or 5 whether or not there is an abnormality in the urea water supply system.
- the routine proceeds to step 57 where it is determined whether there is an abnormality in the urea water. This urea water abnormality determination routine is shown in FIG.
- step 90 it is first determined in advance in step 90.
- the normal concentration D Q of urea water is read.
- the actual urea water concentration D is detected from the output signal of the urea concentration sensor 22.
- step 92 the actual urea water concentration D is D. It is determined whether or not it is between 1a (a is a small constant value) and D Q + a, that is, whether it is within the allowable range considered normal. D.
- key ⁇ D ⁇ D Q + key it proceeds to step 93 and is determined to be normal.
- step 9 D in step 9 2. 1 ⁇ D or D ⁇ D.
- the routine proceeds to step 94 and it is determined that there is an abnormality in the urea water.
- step 51 when it is determined at step 51 that there is an abnormality in the urea water supply system, the routine proceeds to step 52 where it is determined whether there is an abnormality in the urea water by the routine shown in FIG. When the urea water is abnormal, complete the treatment cycle. On the other hand, when it is determined in step 52 that there is no abnormality in the urea water, the routine proceeds to step 53, where, for example, urea water that is intermittently injected is set so that the urea water supply amount becomes a normal supply amount.
- the valve opening period of the supply valve 17 is K, doubled as calculated in Fig. 4 or Fig. 5.
- N_ ⁇ x sensor 3 9 N_ ⁇ x purification rate from the output value of whether recovered to within a permissible range is judged.
- the routine proceeds to step 55 where it is determined that there is an abnormality in the urea water supply system.
- N_ ⁇ x purification rate in Step 5 4 When it is determined that the recovery has not occurred, the routine proceeds to step 56 where it is determined that both the urea water supply system and the NO x selective reduction catalyst 15 are abnormal.
- step 57 if it is determined in step 57 that there is an abnormality in the urea water, the process proceeds to step 58, and the urea water supply, for example, is intermittently injected so that the urea supply amount becomes a normal supply amount.
- opening period of the valve 1 7 is a K 2 times calculated in Fig.
- step 59 it is determined from the output value of the ⁇ ⁇ ⁇ sensor 39 whether or not the ⁇ ⁇ ⁇ purification rate has recovered to within an allowable range.
- the routine proceeds to step 60 where it is determined that there is an abnormality in the urea water.
- the Nyu_ ⁇ ⁇ purification rate is determined to not recovered in step 5 9 there is an abnormality in both of the urea water and ⁇ ⁇ ⁇ selective reduction catalyst 1 5 proceeds to Step 61 .
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2008800009367A CN101548077B (zh) | 2007-04-25 | 2008-04-09 | 内燃机的排气净化装置 |
EP08740456.2A EP2141331B1 (en) | 2007-04-25 | 2008-04-09 | Exhaust purification device for internal combustion engine |
US12/309,442 US8132402B2 (en) | 2007-04-25 | 2008-04-09 | Exhaust purification device of internal combustion engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007115690A JP4710868B2 (ja) | 2007-04-25 | 2007-04-25 | 内燃機関の排気浄化装置 |
JP2007-115690 | 2007-04-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008133122A1 true WO2008133122A1 (ja) | 2008-11-06 |
Family
ID=39925580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2008/057370 WO2008133122A1 (ja) | 2007-04-25 | 2008-04-09 | 内燃機関の排気浄化装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8132402B2 (ja) |
EP (1) | EP2141331B1 (ja) |
JP (1) | JP4710868B2 (ja) |
CN (1) | CN101548077B (ja) |
WO (1) | WO2008133122A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010163923A (ja) * | 2009-01-14 | 2010-07-29 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
CN101832170A (zh) * | 2009-03-10 | 2010-09-15 | 株式会社电装 | 用于尾气净化系统的异常诊断装置及尾气净化系统 |
CN103261600A (zh) * | 2010-12-17 | 2013-08-21 | Ud卡车株式会社 | 泵装置 |
CN105143624A (zh) * | 2013-06-17 | 2015-12-09 | 日野自动车株式会社 | 尿素水供给系统的诊断装置 |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4412399B2 (ja) * | 2007-12-06 | 2010-02-10 | トヨタ自動車株式会社 | 内燃機関の異常検出装置 |
JP5290701B2 (ja) | 2008-03-26 | 2013-09-18 | 日立オートモティブシステムズ株式会社 | 流体圧緩衝器 |
EP2381077A4 (en) | 2009-01-19 | 2017-11-22 | Toyota Jidosha Kabushiki Kaisha | Abnormality detection device for exhaust purification device and abnormality detection method for exhaust purification device |
SE535363C2 (sv) * | 2010-11-17 | 2012-07-10 | Scania Cv Ab | Arrangemang samt förfarande för ett doseringssystem för tillförsel av ett reduktionsmedel i avgasflödet från en förbränningsanordning |
WO2012138936A1 (en) | 2011-04-05 | 2012-10-11 | Cummins Inc. | System, method, and apparatus for aftertreatment system monitoring |
DE102011101174A1 (de) | 2011-05-11 | 2012-02-16 | Daimler Ag | Verfahren zur Diagnose eines Abgasreinigungssystems |
DE102011103272B4 (de) * | 2011-05-26 | 2014-05-22 | Continental Automotive Gmbh | Verfahren und Vorrichtung zum Betreiben eines SCR-Systems |
DE102012201128B3 (de) * | 2012-01-26 | 2013-01-17 | Ford Global Technologies, Llc | Verfahren, Steuergerät und Speichermedium zur Steuerung einer Harnstoffinjektion bei niedrigen Abgastemperaturen unter Berücksichtigung des Harnstoffgehalts |
CN104145095B (zh) | 2012-02-28 | 2017-09-12 | 诺玛美国控股有限责任公司 | 自动选择性催化还原(scr)系统传感器保持件和组件 |
FR2989421B1 (fr) * | 2012-04-13 | 2014-05-02 | Peugeot Citroen Automobiles Sa | Procede de mise en œuvre d'un systeme de post-traitement de gaz d'echappement |
US10221746B2 (en) * | 2012-12-13 | 2019-03-05 | Toyota Jidosha Kabushiki Kaisha | Failure diagnosis apparatus for exhaust gas control apparatus |
JP6127509B2 (ja) * | 2012-12-28 | 2017-05-17 | いすゞ自動車株式会社 | 尿素scr用尿素水消費量診断装置 |
JP6011332B2 (ja) * | 2012-12-28 | 2016-10-19 | いすゞ自動車株式会社 | 尿素scr用尿素水消費量診断装置 |
JP6127510B2 (ja) * | 2012-12-28 | 2017-05-17 | いすゞ自動車株式会社 | 尿素scr用尿素水消費量診断装置 |
JP6142530B2 (ja) * | 2012-12-28 | 2017-06-07 | いすゞ自動車株式会社 | 尿素scr用尿素水消費量診断装置 |
JP6136297B2 (ja) * | 2013-01-28 | 2017-05-31 | いすゞ自動車株式会社 | 尿素scr用尿素水消費量診断装置 |
JP6225638B2 (ja) * | 2013-10-25 | 2017-11-08 | いすゞ自動車株式会社 | Scrシステム、scrセンサ、およびレベルセンサ |
KR101637758B1 (ko) | 2014-12-03 | 2016-07-07 | 현대자동차주식회사 | Scr 시스템의 고장진단방법 및 고장진단장치 |
DE102016210619A1 (de) * | 2016-06-15 | 2017-12-21 | Robert Bosch Gmbh | Verfahren zur Diagnose eines Reagenzmittel-Dosiersystems, Vorrichtung zur Durchführung des Verfahrens, Computer-Programm sowie Computer-Programmprodukt |
CN107665839B (zh) * | 2016-07-29 | 2021-08-10 | 芝浦机械电子装置股份有限公司 | 处理液生成装置和使用该处理液生成装置的基板处理装置 |
GB2571665B (en) * | 2016-12-12 | 2022-03-30 | Cummins Emission Solutions Inc | Reductant concentration diagnostic systems and methods |
KR102057778B1 (ko) * | 2018-04-30 | 2019-12-19 | 에이치에스디엔진 주식회사 | 선택적 촉매 환원 시스템 |
CN112302771B (zh) * | 2020-11-06 | 2022-01-25 | 潍柴动力股份有限公司 | 检测尿素消耗量异常的方法、装置、设备及存储介质 |
DE102020130167A1 (de) * | 2020-11-16 | 2022-05-19 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Gutprüfung an einem Verbrennungsmotor mit Additiveinspritzung, Steuergerät und Kraftfahrzeug |
CN114458433B (zh) * | 2022-02-16 | 2023-05-23 | 潍柴动力股份有限公司 | 一种尿素喷嘴堵塞判断方法、scr系统及车辆 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005113708A (ja) * | 2003-10-03 | 2005-04-28 | Nissan Diesel Motor Co Ltd | エンジンの排気浄化装置 |
JP2006037770A (ja) | 2004-07-23 | 2006-02-09 | Hino Motors Ltd | 排気浄化装置の異常検知方法 |
JP2007077827A (ja) * | 2005-09-12 | 2007-03-29 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6363771B1 (en) * | 1999-11-24 | 2002-04-02 | Caterpillar Inc. | Emissions diagnostic system |
JP3800016B2 (ja) | 2001-02-15 | 2006-07-19 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP2002371831A (ja) | 2001-06-13 | 2002-12-26 | Nissan Diesel Motor Co Ltd | 自動車の排ガス浄化装置 |
US6546720B2 (en) * | 2001-09-04 | 2003-04-15 | Ford Global Technologies, Inc. | Method and apparatus for controlling the amount of reactant to be added to a substance using a sensor which is responsive to both the reactant and the substance |
JP2003120399A (ja) | 2001-10-09 | 2003-04-23 | Toyota Motor Corp | NOxセンサ異常検出装置 |
JP4161609B2 (ja) * | 2002-04-23 | 2008-10-08 | 三菱ふそうトラック・バス株式会社 | 内燃機関の排気浄化装置 |
US6701707B1 (en) * | 2002-09-04 | 2004-03-09 | Ford Global Technologies, Llc | Exhaust emission diagnostics |
JP3687916B2 (ja) * | 2003-10-28 | 2005-08-24 | 日産ディーゼル工業株式会社 | エンジンの排気浄化装置 |
JP2006002663A (ja) | 2004-06-17 | 2006-01-05 | Hino Motors Ltd | 排気浄化装置 |
JP3686669B1 (ja) * | 2004-10-29 | 2005-08-24 | 日産ディーゼル工業株式会社 | 液体還元剤判別装置 |
JP4290109B2 (ja) * | 2004-10-29 | 2009-07-01 | 日産ディーゼル工業株式会社 | 排気浄化装置 |
US7418816B2 (en) * | 2005-09-01 | 2008-09-02 | Ford Global Technologies, Llc | Exhaust gas aftertreatment systems |
EP1931865B1 (en) | 2005-09-29 | 2013-11-13 | Volvo Lastvagnar AB | A diagnostic method for an exhaust aftertreatment system |
US7610750B2 (en) * | 2006-07-25 | 2009-11-03 | Gm Global Technology Operations, Inc. | Method and apparatus for monitoring a urea injection system in an exhaust aftertreatment system |
JP4438828B2 (ja) * | 2007-06-08 | 2010-03-24 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
-
2007
- 2007-04-25 JP JP2007115690A patent/JP4710868B2/ja active Active
-
2008
- 2008-04-09 CN CN2008800009367A patent/CN101548077B/zh not_active Expired - Fee Related
- 2008-04-09 EP EP08740456.2A patent/EP2141331B1/en not_active Expired - Fee Related
- 2008-04-09 US US12/309,442 patent/US8132402B2/en not_active Expired - Fee Related
- 2008-04-09 WO PCT/JP2008/057370 patent/WO2008133122A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005113708A (ja) * | 2003-10-03 | 2005-04-28 | Nissan Diesel Motor Co Ltd | エンジンの排気浄化装置 |
JP2006037770A (ja) | 2004-07-23 | 2006-02-09 | Hino Motors Ltd | 排気浄化装置の異常検知方法 |
JP2007077827A (ja) * | 2005-09-12 | 2007-03-29 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2141331A4 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010163923A (ja) * | 2009-01-14 | 2010-07-29 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
CN101832170A (zh) * | 2009-03-10 | 2010-09-15 | 株式会社电装 | 用于尾气净化系统的异常诊断装置及尾气净化系统 |
CN101832170B (zh) * | 2009-03-10 | 2012-08-29 | 株式会社电装 | 用于尾气净化系统的异常诊断装置及尾气净化系统 |
CN103261600A (zh) * | 2010-12-17 | 2013-08-21 | Ud卡车株式会社 | 泵装置 |
CN105143624A (zh) * | 2013-06-17 | 2015-12-09 | 日野自动车株式会社 | 尿素水供给系统的诊断装置 |
Also Published As
Publication number | Publication date |
---|---|
US20090301059A1 (en) | 2009-12-10 |
US8132402B2 (en) | 2012-03-13 |
CN101548077B (zh) | 2012-06-13 |
JP2008274765A (ja) | 2008-11-13 |
JP4710868B2 (ja) | 2011-06-29 |
EP2141331A4 (en) | 2010-12-15 |
EP2141331B1 (en) | 2016-07-06 |
EP2141331A1 (en) | 2010-01-06 |
CN101548077A (zh) | 2009-09-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2008133122A1 (ja) | 内燃機関の排気浄化装置 | |
CN108412589B (zh) | 内燃机的排气净化装置的异常诊断装置及诊断方法、内燃机系统及其控制方法 | |
KR101051900B1 (ko) | 내연기관의 이상 검출 시스템 및 이상 검출 방법 | |
JP4428445B2 (ja) | 内燃機関の排気浄化装置 | |
US8783019B2 (en) | Apparatus and method for onboard performance monitoring of oxidation catalyst | |
US8250856B2 (en) | Exhaust purification device of internal combustion engine | |
EP2133524B1 (en) | Apparatus for purifying exhaust gas in internal combustion engine | |
JP4730352B2 (ja) | 圧縮着火式内燃機関の排気浄化装置 | |
US20150192048A1 (en) | Abnormality diagnosis device and exhaust gas purification device of internal combustion engine | |
AU2011372591B2 (en) | Exhaust purification apparatus for internal combustion engine | |
WO2008114885A1 (ja) | 圧縮着火式内燃機関の排気浄化装置 | |
JP2008231950A (ja) | 内燃機関の排気浄化装置 | |
WO2009025343A1 (ja) | 内燃機関の排気浄化装置 | |
JP6638549B2 (ja) | 内燃機関の排気ガス浄化システム及び内燃機関の排気ガス浄化方法 | |
JP2012082703A (ja) | 選択還元型NOx触媒の劣化検出装置及び方法 | |
JP2009167940A (ja) | 内燃機関の排気浄化装置 | |
JP5263123B2 (ja) | 内燃機関の排気浄化装置 | |
JP6631479B2 (ja) | 内燃機関の排気浄化装置の異常診断装置 | |
JP2010261329A (ja) | 排気浄化装置 | |
JP2008232055A (ja) | 内燃機関の排気浄化装置 | |
JP2020023922A (ja) | 内燃機関の排気浄化装置 | |
JP4877159B2 (ja) | 内燃機関のegr制御システム | |
JP2010261330A (ja) | 排気浄化装置 | |
JP2009138624A (ja) | 内燃機関の異常検出装置 | |
JP2008255942A (ja) | 内燃機関の排気浄化装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200880000936.7 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 08740456 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12309442 Country of ref document: US |
|
REEP | Request for entry into the european phase |
Ref document number: 2008740456 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2008740456 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |