CN105189959A - Controlling device for internal combustion engines - Google Patents
Controlling device for internal combustion engines Download PDFInfo
- Publication number
- CN105189959A CN105189959A CN201480016630.6A CN201480016630A CN105189959A CN 105189959 A CN105189959 A CN 105189959A CN 201480016630 A CN201480016630 A CN 201480016630A CN 105189959 A CN105189959 A CN 105189959A
- Authority
- CN
- China
- Prior art keywords
- temperature
- sulphur
- combustion engine
- internal
- catalyzer
- 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.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 36
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 80
- 230000008929 regeneration Effects 0.000 claims abstract description 47
- 238000011069 regeneration method Methods 0.000 claims abstract description 47
- 230000001590 oxidative effect Effects 0.000 claims abstract description 5
- 239000005864 Sulphur Substances 0.000 claims description 75
- 239000000446 fuel Substances 0.000 claims description 56
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 41
- 229910052760 oxygen Inorganic materials 0.000 claims description 41
- 239000001301 oxygen Substances 0.000 claims description 41
- 238000006243 chemical reaction Methods 0.000 claims description 39
- 239000002912 waste gas Substances 0.000 claims description 12
- 239000013618 particulate matter Substances 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 abstract description 16
- 238000007254 oxidation reaction Methods 0.000 abstract description 16
- 230000003647 oxidation Effects 0.000 abstract description 15
- 229910052717 sulfur Inorganic materials 0.000 abstract description 5
- 239000011593 sulfur Substances 0.000 abstract description 5
- 239000000779 smoke Substances 0.000 abstract description 2
- 235000019504 cigarettes Nutrition 0.000 description 53
- 238000000034 method Methods 0.000 description 44
- 230000008569 process Effects 0.000 description 40
- 238000009825 accumulation Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 4
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- 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
-
- 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
- F01N3/02—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
- 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
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/106—Auxiliary oxidation catalysts
-
- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/027—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting SOx
-
- 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
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
- F01N2900/1402—Exhaust gas composition
-
- 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
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
- F01N2900/1404—Exhaust gas temperature
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
A controlling device for internal combustion engines provided with a filter downstream of a catalyst having an oxidizing function comprises a controlling unit that maintains, when a PM regeneration request for the filter is satisfied, the exhaust temperature for a fixed period at a sulfur removal temperature that is lower than a PM oxidization starting temperature and that is higher than the maximum temperature reached by the exhaust or the bed of the catalyst from the time of completion of the previous PM regeneration to the current PM regeneration request, and then sets the exhaust temperature to be higher than the PM oxidation starting temperature. Thus, rapid removal of sulfur is avoided and thereby generation of white smoke can be suppressed.
Description
Technical field
The present invention relates to a kind of control gear of internal-combustion engine.
Background technique
All the time, known to the sulphur release process implementing oxidation catalyst, when PM (ParticulateMatter: particulate matter) accumulating amount is more, the process of filter bed temperature can be implemented.As document related to this, such as, there is patent documentation 1.But, SO contained in the exhaust of known internal-combustion engine
2(sulfur dioxide) will become SO in oxidation catalyst
3(sulfur trioxide), so by with H
2o (water) reacts and can become H
2sO
4.Sometimes H
2sO
4white cigarette (the white cigarette of sulphate) can be become and be released in air.In patent documentation 1, and unexposed this chemical reaction.
At first technical paper
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2009-299572 publication
Summary of the invention
Invent problem to be solved
As mentioned above, SO
3by with H
2o reacts and becomes H
2sO
4.Oxidation catalyst also has absorption SO
xcharacter.Therefore, arrange with oxidation catalyst simultaneously and the filter caught PM (such as, DPF:DieselParticulateFilter: diesel soot filter) regenerates time, likely can produce a large amount of white cigarettes.That is, sulfur component (S composition) contained in burned in internal-combustion engine fuel, be attracted to the absorption SO departed from oxidation catalyst and because of the rising of the delivery temperature along with PM regeneration requirements
xlikely can become white cigarette.
Therefore, the control gear of the internal-combustion engine disclosed in this specification produces the situation of white cigarette for problem to suppress because sulphur when PM regenerates departs from.
For solving the method for problem
In order to solve relevant problem, the control gear of internal-combustion engine disclosed in this specification is, filter is possessed at the downstream part of the catalyzer with oxidative function, the control gear of described internal-combustion engine possesses control device, described control device is when the PM regeneration requirements of described filter has been set up, delivery temperature was maintained at fixing period start temperature with particulate matter compared with and lower, and the bed temperature of exhaust with at the end of last time particulate regeneration to this particulate regeneration requires or described catalyzer to be up to compared with Da Wendu and after higher sulphur departs from temperature, described delivery temperature is set to more than described PM oxidation starting temperature.Described control device the described Da Wendu of being up to be in described catalyzer from SO
2to SO
3the conversion ratio of conversion is when becoming below the conversion permissible temperature of below admissible value, described sulphur departed from temperature and is set as being up to Da Wendu and arbitrary temp below described conversion permissible temperature higher than described.
In catalyzer pile up, the sulphur that adsorbs has following character, that is, can Yin Wendu become pile up higher than it, absorption time temperature and start to depart from.Therefore, if do not become from last time PM regeneration ending up to this filter generate require before delivery temperature history be up to more than Da Wendu, then sulphur can not be made to depart from.Therefore, when having the regeneration requirements of filter, as long as control in the mode ad initio namely becoming PM oxidation starting temperature, sulphur just can be made to depart from.But on the other hand, the disengaging of the higher then sulphur of temperature is faster, thus the release rate of sulphur more accelerates.Its result is, likely brings out the generation of white cigarette.
Therefore, maintain the sulphur S disengaging that can make to adsorb in catalyzer, the minimum temperature discharged and sulphur with fixing period and depart from temperature, and after disengaging, release sulphur, make delivery temperature rise to more than PM oxidation starting temperature.Thereby, it is possible to the generation of white cigarette when the generation of white cigarette when suppressing sulphur to depart from and PM regeneration.
Described control device can the described Da Wendu of being up to be make in described catalyzer from SO
2to SO
3conversion ratio when becoming below the conversion permissible temperature of below admissible value, described sulphur is departed from temperature and is set to described conversion permissible temperature.
When being up to Da Wendu and being below conversion permissible temperature, sulphur can be departed from temperature and be set in the scope of below conversion permissible temperature.Become the SO of the reason that white cigarette occurs
3pass through SO
2oxidized and produce.From SO
2to SO
3conversion ratio by the impact of delivery temperature.Therefore, be set in the scope of below conversion permissible temperature as long as in advance sulphur to be departed from temperature, then white cigarette can be suppressed in permissible range.In addition, sulphur departs from temperature and needs to be higher than the temperature being up to Da Wendu, and this temperature is higher, then the efficiency of sulphur disengaging is higher.If consider these factors, then when being up to Da Wendu and being below conversion permissible temperature, conversion permissible temperature can be set to by sulphur being departed from temperature, thus implement the disengaging of efficient sulphur while suppressing in permissible range by white cigarette.Be set to conversion permissible temperature by sulphur being departed from temperature, thus sulphur disengaging can be accelerated while effectively suppressing white cigarette to produce.
Described control device can periodically make the bed temperature of exhaust or described catalyzer rise before the described sulphur of arrival departs from temperature.Thereby, it is possible to make the different sulphur of accumulation temperature depart from while the generation suppressing white cigarette.
Described control device can be set up at the PM regeneration requirements of described filter and have the delivery temperature rising requirement in the downstream side of described catalyzer, the oxygen concentration in the waste gas flowed into described catalyzer is made to be reduced to below the upper limit threshold of the oxygen concentration corresponding with the sulphur concentration value in the fuel carrying out burning in described internal-combustion engine.
Oxygen is needed when being arranged in exhaust pathway and the filter being configured in the downstream part of the catalyzer with oxidative function regenerates.On the other hand, when oxygen concentration is too high, the fuel because containing sulphur composition is carried out burning and the SO generated
2oxidized thus generate SO
3.Similarly, the Sulfur S composition piled up in catalyzer or filter is also by departing from, be oxidized and becoming SO
3.The SO be generated by this way
3with H
2o is combined into as H
2sO
4and be atomized, namely become white cigarette.Therefore, when permitting having delivery temperature rising to require in the regeneration in order to carry out material, the mainly PM (ParticulateMatter) that pile up in filter, the control that oxygen concentration is reduced will be implemented.Thereby, it is possible to suppress the generation of white cigarette.
The effect of invention
According to the control gear of the internal-combustion engine disclosed in this specification, can suppress because sulphur when PM regenerates departs from the generation of the white cigarette caused.
Accompanying drawing explanation
Fig. 1 is the explanatory drawing of the Sketch of the internal-combustion engine representing mode of execution.
The flow chart of an example of the control that the control gear that Fig. 2 is the internal-combustion engine representing mode of execution is implemented.
Fig. 3 is for representing delivery temperature and SO
3the plotted curve of the relation of conversion ratio.
Fig. 4 represents that S accumulation temperature and S depart from the plotted curve of the relation of temperature.
The flow chart of an example of the control that the control gear that Fig. 5 is the internal-combustion engine representing mode of execution is implemented.
The PM that the control gear of the internal-combustion engine that Fig. 6 is mode of execution is implemented regenerates an example of sequential chart.
Fig. 7 is the explanatory drawing representing the relation of piling up S amount and fuel S concentration.
Fig. 8 represents that fuel S concentration and white cigarette suppress the plotted curve of the relation of target A/Ftrg.
Fig. 9 is the plotted curve of the generation situation representing white cigarette.
Figure 10 is the plotted curve of the relation representing τ trg between fuel S concentration value and white cigarette inhibitory control implementation period.
Figure 11 is the plotted curve of the impact of A/F dialogue cigarette when representing PM regeneration.
Figure 12 (A) is medelling represents the explanatory drawing of the situation of the candidate value of the fixed value storing each target process pre-set, and Figure 12 (B) is medelling represents that the process of contrast target is to set the explanatory drawing of the situation of fixed value.
Figure 13 is the plotted curve of the delivery temperature Change Example represented during PM regeneration intervals.
Embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are described.But, in the accompanying drawings, also there are the size in each portion, ratio etc. not to carry out illustrated situation with the on all four mode of the parts of reality.In addition, described drawing also exists the situation that detail section is omitted.
(mode of execution)
Fig. 1 is the explanatory drawing of the Sketch of the internal-combustion engine 1 representing mode of execution.Internal-combustion engine 1 possesses the control gear (hereinafter referred to as control gear) of engine main body 2 and internal-combustion engine.Engine main body 2 is connected with gas-entered passageway 4 and exhaust passage 5.Engine main body 2 is connected with one end of EGR (ExhaustGasRecirculation: EGR) passage 6.The other end of EGR channel 6 is connected with gas-entered passageway.EGR channel 6 is configured with cooler for recycled exhaust gas 7 and EGR valve 8.Gas-entered passageway 4 is configured with closure 9.Exhaust passage 5 is configured with DOC (DieselOxidationCatalyst: diesel oxidation catalyst) 10.DOC10 be have oxidative function catalyzer and be comprised in internal-combustion engine 1.DPF (DieselParticulateFilter: diesel soot filter) 11 is configured with in the downstream side of the DOC10 of exhaust passage.DPF11 is the filter that catches PM and is comprised in internal-combustion engine 1.
On exhaust passage 5 between engine main body 2 and DOC10, from upstream side, be configured with SO successively
xsensor 12, exhaust add fuel valve 13, first temperature transducer 14.SO
xsensor 12 be comprised in together with the A/F sensor 17 hereinafter to illustrate obtain internal-combustion engine 1, be more specifically S concentration value (hereinafter referred to as fuel S concentration) in the fuel that carries out burning in engine main body 2 unit in.Exhaust is added fuel valve 13 and is passed through to burner oil in exhaust passage 5, thus adds fuel in waste gas.The waste gas being added fuel burns and becomes high-temp waste gas under DOC10.The temperature of the waste gas that the first temperature transducer 14 subtend DOC10 imports (DOC temperature, enter the gas temperature of catalyzer) measures.
On exhaust passage 5 between DOC10 and DPF11, be configured with the second temperature transducer 15.Temperature (dpf temperature) Tex of the waste gas that the second temperature transducer 15 subtend DPF11 imports measures.In the following description, the temperature of this waste gas is described as delivery temperature Tex.
On the exhaust passage 5 in the downstream side of DPF11, from upstream side, be configured with three-temperature sensor 16 and A/F sensor 17 successively.The temperature of three-temperature sensor 16 to the waste gas be discharged from DPF11 measures.The bed temperature Tm of dpf temperature, i.e. catalyzer is grasped according to the measured load of this three-temperature sensor 16 and above-mentioned second temperature transducer 15 measured load.In addition, also catalyst temperature Tm can be set to DOC temperature, and utilization and these temperature has the value of coherence to obtain the bed temperature Tm of catalyzer.
In addition, in the control gear 3 of present embodiment, as hereinafter described in detail, be implemented as follows control, that is, maintain with fixing period with from last time PM regeneration ending to the bed temperature of the exhaust before this PM regeneration requirements or described catalyzer to be up to compared with Da Wendu and higher sulphur departs from temperature.At this, to be up to Da Wendu carry out regulation time, as long as with reference to any one party in the bed temperature Tm of delivery temperature Tex or catalyzer.Although because the sulphur S composition of the object becoming disengaging has direct relation, because the bed temperature of delivery temperature and catalyzer has coherence, as long as therefore with reference to any one temperature in the catalyst and with the bed temperature of catalyzer because piling up, adsorbing.In the following description, unify to be described for delivery temperature.
A/F sensor 17 measures exhaust A/F.As mentioned above, A/F sensor 17 and SO
xsensor 12 is comprised in the unit obtaining fuel S concentration value together.Fuel S concentration value and the SO in exhaust
xconcentration has coherence.Therefore, it is possible to according to by SO
xsO in the exhaust that sensor 12 detects
xconcentration value and exhaust A/F calculate fuel S concentration.In addition, the SO owing to being discharged from engine main body 2
xbe exactly roughly SO
2, therefore SO
xsensor only need use SO
2sensor.
Internal-combustion engine 1 possesses ECU (ElectronicControlUnit: electronic control unit) 18.ECU18 implements the various controls in internal-combustion engine 1.In addition, ECU18 is also comprised in control gear 3, and as control gear 3 control device and play function.ECU18 and EGR valve 8, closure 9, SO
xsensor 12, exhaust add fuel valve 13, first temperature transducer 14, second temperature transducer 15, three-temperature sensor 16 and A/F sensor 17 and are electrically connected, thus formation control device 3.ECU18 obtains PM accumulating amount.Specifically, ECU18 calculates the PM accumulating amount in DPF11 according to the operation mode (driving mode of vehicle) of internal-combustion engine 1.And, implement the judgement whether PM regeneration requirements is set up.Further, ECU18 carries out continuation record to delivery temperature Tex, thus obtains and be up to Da Wendu TexMAX to the delivery temperature before this PM regeneration requirements from last time PM regeneration ending.
Play the ECU18 of function as control device, rising according to the delivery temperature in the downstream side of DOC10 requires, is more specifically that the PM regeneration requirements of DPF11 implements PM regeneration.ECU18 when the regeneration requirements of DPF11 has been set up, first make delivery temperature Tex be maintained at fixing period lower compared with PM oxidation starting temperature and with from last time PM regeneration ending to before this PM regeneration requirements to be up to compared with Da Wendu TexMAX and higher sulphur departs from temperature.And delivery temperature Tex is set to more than PM oxidation starting temperature by ECU18 after this.Now, the oxygen concentration that the oxygen concentration implementing to make to flow into DOC10 reduces reduces control.
Next, with reference to the flow chart shown in Fig. 2, the control that control gear 3 is implemented example is described.In the flow process shown in Fig. 2, illustrate the control that the PM for filter, i.e. DPF11 regenerates overall.
First, when PM regeneration ending last time, the numerical value being stored in the PM accumulating amount in ECU18 is eliminated and is reset, and comes into effect the control regenerated for this PM.In step sl, delivery temperature Tex when routinely obtaining traveling is also stored in ECU18.Then, in step s 2, whenever obtaining delivery temperature Tex, then at this time point place, whether acquired delivery temperature Tex is judged higher than the delivery temperature Tex be stored (Tex that last time obtains).When being judged as YES in step s 2, step S3 will be entered, and the Tex this obtained stores as being up to Da Wendu TexMAX of this time point place.In addition, due to the value do not compared when obtaining delivery temperature Tex at first, therefore this delivery temperature Tex will directly be stored as being up to Da Wendu TexMAX.
In the follow-up step S4 implemented in step S3, judge whether there is PM regeneration requirements.When being judged as NO in step s 2, the also process of implementation step S4.When being judged as NO in step s 4 which, the process from step S1 will be repeated.When being judged as YES in step s 4 which, setting up as this PM regeneration requirements and enter step S5.
In step s 5, to the delivery temperature at this time point place be up to Da Wendu TexMAX whether higher than in DOC10 or DPF11 from SO
2to SO
3conversion ratio become the conversion permissible temperature TS0 of below admissible value
3judge.That is, in step s 5, to from last time PM regeneration ending to whether being up to Da Wendu TexMAX higher than conversion permissible temperature TS0 before this PM regeneration requirements
3judge.At this, come conversion permissible temperature TS0 with reference to Fig. 3
3be described.If with reference to Fig. 3, then change permissible temperature TS0
3with SO
2occur oxidation and from SO
2to S0
3the ratio carrying out changing is relevant.Such as, therefore, at S0
3conversion ratio is allowed when reaching 40%, and in figure 3, the maximum temperature of " permissible range " will become conversion permissible temperature TS0
3.In addition, such as, S0 is worked as
3when conversion ratio is 0%, in figure 3, the minimum temperature of " permissible range " will become conversion permissible temperature TS0
3.In addition, this conversion permissible temperature TS0
3different because catalyzer specification is different, can be set properly.
In step s 5, when being judged as YES, step S6 will be entered.In step s 6, TexMAX directly as TexMAX value and be used.On the other hand, in step s 5, when being judged as NO, step S7 will be entered.In the step s 7, permissible temperature TS0 is changed
3as TexMAX value and be used.Such as, at this, as shown in Figure 3, by the SO allowed
3when conversion ratio having the amplitude of accommodation, can adopted value be as follows as TexMAX.That is, adopted value can be up to higher compared with Da Wendu TexMAX with set in step s3 and changing permissible temperature TS0 as TexMAX
3arbitrary temp set in following scope.At this, becoming higher than the essential condition being up to Da Wendu TexMAX is the condition be required to make sulphur depart from.In addition, conversion permissible temperature TS0 is become
3essential condition in following scope is in order to by SO
3conversion ratio controls the condition be required in permissible range.At this, although can adopt owing to being set to arbitrary temp the temperature meeting above-mentioned condition, in order to effectively make sulphur depart from, being preferably and adopting conversion permissible temperature TS0
3.Such as, be up to Da Wendu TexMAX for far below conversion permissible temperature TS0
3temperature when, although relative to conversion permissible temperature TS0
3and leave more than needed, but to be up to Da Wendu TexMAX for benchmark, then in efficiency, still have room for improvement.That is, as long as owing to changing permissible temperature TS0
3below, from SO
2to S0
3conversion namely allowed, be therefore intended to implement the disengaging of the most effective sulphur within the scope of this.
In effective step S8-1, TexMAX+ α is set as sulphur departs from temperature in step S6 follow-up.At this, the implication of+α is be set as the temperature higher than TexMAX.If with reference to Fig. 4, then known sulphur carries out more than the temperature that the departs from temperature when this sulphur is piled up.Specifically, SO is in the catalyst piled up when delivery temperature is A DEG C
2depart from when catalyst temperature becomes A+ α DEG C.In addition, SO is in the catalyst piled up when delivery temperature is B DEG C
2depart from when catalyst temperature becomes B+ α DEG C.So, temperature is piled up in order to make accumulation, adsorbing sulphur S disengaging in the catalyst and need to make temperature exceed it.Therefore, in the present embodiment, TexMAX+ α is set as that sulphur departs from temperature.In addition, the concrete value of+α suitably can determine according to situation about being applicable to.Now, due to when excessive temperature higher than TexMAX time, sulphur S release rate will be accelerated, thus easily become white cigarette, therefore will consider that this point decides the value of α.That is, sulphur departs from temperature and sulphur will can be made to carry out departing from, is set under this purport of minimum temperature of discharging adopting.
On the other hand, in effective step S8-2, TexMAX is set as sulphur departs from temperature in step S7 follow-up.That is, without the need to being set to the process of+α.This considers, be replaced by TexMAX owing to changing permissible temperature TS03 in the step s 7, and the TexMAX be replaced is the temperature of the TexMAX higher than reality, therefore sulphur S is implemented disengaging.
, in step S8-1 or step S8-2 implement sulphur and depart from process in effective step S9 follow-up.This step S9 becomes subroutine, will describe in detail later about its content.Follow-up in step S9 in effective step S10, the value of TexMAX is eliminated.And, in step s 11, implement PM Regeneration control.Specifically, delivery temperature Tex is set as more than PM oxidation starting temperature.Thus, PM regeneration is implemented.At this, although PM oxidation starting temperature is the temperature departing from temperature higher than sulphur, before PM Regeneration control, delivery temperature Tex is maintained sulphur with fixing period and departs from temperature, and sulphur S is departed from.Therefore, the generation of white cigarette when inhibit PM to regenerate.
At the end of the process of step S11, regenerating relevant a series of process to this PM will terminate, and for the PM regeneration requirements of next time and the process again repeated from step S1.
Next, the sulphur processing execution implemented control gear 3 with reference to the flow chart shown in Fig. 5 controls, an example of the detailed control of step S9 in flow chart namely shown in Fig. 2 is described.In addition, by maintaining TexMAX+ α with the scheduled time, maintain TexMAX with the scheduled time when by way of step S8-2 when by way of step S8-1, thus sulphur is carried out depart from after, be transferred to common PM Regeneration control (step S11).
First, in step S91, to whether satisfied exhaust interpolation fuel condition judges.Specifically, whether exceed threshold value T1 to the gas temperature entering catalyzer measured by the first temperature transducer 14 to judge.The viewpoint whether this threshold value T1 can become incendivity state according to the fuel be added is set.When being judged as YES in step S91, step S92 will be entered.When being judged as NO in step S91, then repeatedly carry out the process of step S91, till being judged as YES in step S91.
In step S92, obtain fuel S concentration value.That is, as mentioned above, according to SO
xthe measured load of sensor 12 and A/F sensor 17 obtains fuel S concentration value.In addition, also SO can be replaced
xsensor 12 and fuel property sensor is set, and obtain fuel S concentration value according to the measured load of this fuel property sensor.
, in step S92 read white cigarette and suppress target A/F and oxygen concentration to reduce between control implementation period in effective step S93 follow-up.If with reference to Fig. 6, then oxygen concentration reduces and controls between implementation period as during sulphur departs from and process and be performed.If with reference to Fig. 6, then which illustrates an example of the PM regeneration figure of present embodiment, and A/F is controlled as, in the sulphur disengaging process implemented before PM regeneration, trend towards overrich state side.That is, depart from process at sulphur on the direction being controlled in and oxygen concentration is reduced.At this, as long as be set as to the control in the direction making oxygen concentration reduce the control making oxygen concentration reduce.That is, oxygen concentration reduces to control not only to comprise and exceedes ideal air-fuel ratio and the situation that becomes overrich state, but also comprises the state close to ideal air-fuel ratio.If with reference to Fig. 6, then in the present embodiment, the antero-posterior extent of ideal air-fuel ratio is set white cigarette as benchmark to suppress A/F.
So, owing to decreasing the remaining oxygen amount made in waste gas, therefore, it is possible to becoming the H being considered to white cigarette by implementing oxygen concentration to reduce control
2sO
4the SO of generation main cause
3generation suppress.Oxygen concentration reduces control and comprises following process.The intention of each process is as follows.
ECU18 based on fuel S concentration value and oxygen concentration is set.This take into account corresponding to fuel S concentration value and makes the situation that the S concentration in exhaust uprises.In addition, the upper limit threshold of ECU18 based on fuel S concentration value to described oxygen concentration sets.The CLV ceiling limit value of so-called oxygen concentration, in other words referred to the CLV ceiling limit value of rare air fuel ratio.Becoming rare air fuel ratio is relative increase due to air quantity, and the intention therefore setting the CLV ceiling limit value of oxygen concentration is unduly to increase air quantity.If from the SO that engine main body 2 is discharged
2with the SO piled up in DOC10 and DPF11
2be oxidized, be then generated SO
3.Uprise due to the S concentration based on fuel S concentration value in waste gas, as long as therefore the CLV ceiling limit value of based on fuel S concentration value to oxygen concentration sets, just effectively can suppress SO
3generation.
At this, the relation that the accumulation S in DOC10 and DFP11 measures between fuel S concentration value is described in detail.If with reference to Fig. 7, then which illustrates the operating range about the vehicle of three kinds of fuel and the relation of piling up S and measuring.Fuel S concentration value is 2000ppm, 500ppm and 50ppm tri-kinds.Fuel S concentration value is higher, piles up S and measures more.When piling up S amount and being more, when PM regenerates, S releasing quantity just increases.Therefore, become that fuel S concentration value is more high more easily produces SO
3state.So, when fuel S concentration value is higher, then likely SO is produced in a large number
3.Therefore, as shown in Figure 8, dialogue cigarette suppresses the upper limit threshold of target A/Ftrg to set.Specifically, by the benchmark A/F corresponding to fuel sulfur concentration value ± scope of β is set to the permissible range that white cigarette suppresses target A/Ftrg.In addition, the scope of employing ± β is it is considered that be difficult to A/F to control as correct desired value.By arranging the CLV ceiling limit value of the oxygen concentration corresponding to fuel S concentration value, thus to cross rare or to supply oxygen supply close to the state crossing rare air fuel ratio to DFP11, and can suppress the generation of white cigarette, and then the deterioration of oil consumption rate can be suppressed.
Next, be described with reference to the difference of Fig. 9 to the generation situation of the white cigarette that the difference by fuel S concentration value causes.When the concentration of SO3 exceedes predetermined threshold value (white cigarette generation threshold value), white cigarette will be considered to.If with reference to Fig. 9 time, then known exceed this white cigarette threshold value during be that fuel S concentration value higher period is longer.Therefore, in order to effectively suppress white cigarette, as shown in Figure 10, fuel S concentration value is higher, more needs oxygen concentration to be reduced τ trg between control implementation period and is set as a long time.
In step S94 effective after step S93, whether below target A/Ftrg+ β is suppressed to judge at white cigarette to the A/Fm measured by A/F sensor 17.When being judged as NO in step S94, step S95 will be entered.In step S95, the EGR implementing Δ EGR amount adds increment.When being judged as NO in step S94, owing to suppressing the CLV ceiling limit value of permissible range, the i.e. oxygen concentration of target A/Ftrg beyond white cigarette, therefore purport is to adopt increases EGR amount and reduces air quantity thus the process that oxygen concentration is reduced.After the process of step S95 terminates, repeat the process from step S94.
On the other hand, when being judged as YES in step S94, step S96 will be entered.In step S96, whether the A/Fm measured by A/F sensor 17 is judged at more than A/Ftrg-β.When being judged as NO in step S96, step S97 will be entered.In the step s 97, the EGR decrement of Δ EGR amount is implemented.When being judged as NO in step S96, owing to suppressing the permissible range of target A/Ftrg beyond white cigarette, therefore purport is EGR amount decrement thus maintains air concentration.After the process of step S97 terminates, repeat the process from step S94.
In addition, although in the present embodiment, in order to A/Fm is controlled in suitable scope, EGR amount is regulated, also can use other the method that can control A/Fm.Such as in the following way, that is, the adjustment of fuel quantity can be added by exhaust and A/Fm controlled in suitable scope.
In addition, although from the viewpoint of generation suppressing white cigarette, do not pay attention to the lower limit that oxygen concentration is set, if become too low due to oxygen concentration, likely make CO, HC, H
2s and PM increases, and is therefore preferably maintained in suitable scope by A/F.
By the process of implementation step S94 ~ step S97, thus target A/Ftrg is suppressed to control in permissible range white cigarette.And when implementing white cigarette in this way and suppressing target A/Ftrg to control, delivery temperature, catalyst temperature are set in the mode roughly becoming sulphur disengaging temperature.Sulphur departs from temperature, the temperature be set by step S8-1 or step S8-2.The disengaging that the accumulation temperature and being set to of sulphur is not implemented sharply is considered, therefore, it is possible to suppress the generation of white cigarette because sulphur departs from temperature.
When being judged as YES in step S96, step S98 will be entered.In step S98, whether at sulphur, more than temperature is departed to the bed temperature Tm of measured catalyzer and judges.Because delivery temperature and the bed temperature of catalyzer can be considered substantially identical under normal circumstances, therefore by delivery temperature being set to more than sulphur disengaging temperature, sulphur is departed from.At this, in the flow chart shown in Fig. 2, sulphur depart from temperature be by way of step S8-1 or the value by way of the reference of step S8-2 institute different.That is, when by way of step S8-1, employing is used as sulphur by the value of the TexMAX+ α set by step S8-1 and departs from temperature.On the other hand, when by way of step S8-2, employing is used as sulphur by the TexMAX set by step S8-2 and departs from temperature.
When being judged as NO in step S98, step S99 will be entered.In step S99, fuel is added to exhaust and carries out increment.Thus, bed temperature Tm is made to increase.After the process of step S99, again repeat the process of step S98.When being judged as YES in step S98, namely be judged as bed temperature Tm become sulphur to depart from more than temperature and become sulphur can be made to carry out the state departed from time, will step S100 be entered.In the step s 100, τ trg between the control implementation period that whether have passed through for making sulphur depart from is judged.When being judged as NO in the step s 100, the process from step S94 will be repeated.When being judged as YES in the step s 100, end of subroutine.Afterwards, will the step S10 shown in Fig. 2 be entered, thereafter, be transferred to the PM Regeneration control of step S11.Although step S11 becomes subroutine, when this end of subroutine, process also finishes (termination).
An example of the control more than implemented for control gear 3.At this, with reference to Figure 11, the impact of the A/F dialogue cigarette that the sulphur implemented before PM regeneration departs from when processing is described.Figure 11 is the plotted curve of the impact of A/F dialogue cigarette when representing PM regeneration.If with reference to Figure 11, then known SO
3more, white smoke which is more.In addition, also known when PM regenerates, more A/F to be controlled in overrich air fuel ratio side, specifically close to b point direction from a point, then more can suppress the generation of white cigarette.In addition, yet knownly A/F to be controlled in overrich air fuel ratio side, then more make SO
3peak value reduce.Accordingly, in the mode of the above-mentioned control described with reference to Fig. 5, by being controlled by A/F in the permissible range that white cigarette suppresses target A/Ftrg, thus the balance between the suppression of white cigarette and the regeneration of PM can be realized better.
(Change Example)
When the S concentration value of the fuel used in internal-combustion engine is known or for supposition, can the oxygen concentration corresponding with this S concentration value be suitably set in advance, oxygen concentration reduces between the implementation period that controls.In this case, the process of step S92 and step S93 is omitted.Mostly roughly grasped according to target process by the S concentration value of the fuel used in internal-combustion engine.Therefore, it is possible to the S concentration value with due regard to presupposed for each target process, and target A/Ftrg is suppressed to be set to fixed value in advance the oxygen concentration in waste gas, i.e. white cigarette.This fixed value can be set to the value be set in the mode corresponding with the S concentration value carrying out the fuel burnt in internal-combustion engine 1.In addition, similarly, during being set as being set in the mode corresponding with the S concentration value carrying out the fuel burnt in internal-combustion engine 1 between the implementation period that also oxygen concentration reduction can be controlled.So, when according to circumstances setting oxygen concentration, assuming that S concentration value higher, then oxygen concentration sets lower.In addition, according to circumstances oxygen concentration is reduced set between the implementation period controlled time, assuming that S concentration value higher, be during this period just set longer.Can be set between this implementation period in the mode corresponding with the S concentration value carrying out the fuel burnt in internal-combustion engine 1 during setting.
If with reference to Figure 12 (A), then store the oxygen concentration of each target process in ECU18, specifically, store white cigarette and suppress target A/Ftrg-n.In addition, similarly, also store oxygen concentration reduce control implementation period between τ trg-n.That is, as ECU18, what it prepared is the state with versatility, and once determine target process, then can select the white cigarette corresponding with this target process and suppress τ trg-n between target A/Ftrg-n, implementation period.By this way, reduce in implementing oxygen concentration according to the fixed value corresponding with target process the state controlled.In addition, as the establishing method of fixed value, as shown in Figure 12 (B), τ trg-n between target A/Ftrg-n, implementation period is suppressed to be set to blank the white cigarette in ECU at first.Then, once determine target process, then the white cigarette in ECU corresponding with this target process for write is suppressed τ trg-n between target A/Ftrg-n, implementation period.So, can be set to according to the fixed value corresponding with target process and implement oxygen concentration and reduce the state controlled.
In addition, if with reference to Figure 13, then during PM regeneration intervals, as an example of the history of delivery temperature Tex, record TexMAX1, TexMAX2 (TexMAX1 > TexMAX2) sometimes.So, when there is multiple accumulation temperature, using hypothesis higher than as be up to Da Wendu TexMAX1 temperature under implement sulphur depart from process.So, because the sulphur piled up under TexMAX1 departs from, therefore, it is possible to suppress the generation of white cigarette with speed slowly.And the sulphur piled up under TexMAX2, departs from the temperature of the temperature when fully exceeding accumulation, thus to be released at a high speed.Its result is, the possibility producing white cigarette is higher.Therefore, by periodically making delivery temperature rise before arrival TexMAX, thus the sulphur corresponding with piling up temperature can be performed depart from and process, and the generation of white cigarette can be suppressed.In this case, such as shown in figure 13, also can after the accumulating amount judging to become PM regeneration starts 80%, be up to Da Wendu and the mode being up to Da Wendu before this to be divided to till PM regeneration starts, divide proper period, thus extract and be up to Da Wendu.
Above-mentioned mode of execution is only for implementing example of the present invention, the present invention is not defined to this, carry out various distortion to these embodiments to be also included within scope of the present invention, and apparent according to above-mentioned record, other various embodiments can be realized within the scope of the invention.
Symbol description
1 internal-combustion engine;
2 engine main bodies;
3 control gear;
4 gas-entered passageways;
5 exhaust passages;
10DOC；
11DPF；
12SO
xsensor;
Fuel valve is added in 13 exhausts;
17A/F sensor.
Claims (4)
1. the control gear of an internal-combustion engine, it possesses filter at the downstream part of the catalyzer with oxidative function, the control gear of described internal-combustion engine possesses control device, described control device is when the particulate regeneration of described filter requires to have set up, delivery temperature was maintained at fixing period start temperature with particulate matter compared with and lower, and the bed temperature of exhaust with at the end of last time particulate regeneration to this particulate regeneration requires or described catalyzer to be up to compared with Da Wendu and after higher sulphur departs from temperature, described delivery temperature is set to described particulate matter and starts more than temperature,
Described control device the described Da Wendu of being up to be in described catalyzer from SO
2to SO
3the conversion ratio of conversion is when becoming below the conversion permissible temperature of below admissible value, described sulphur departed from temperature and is set as being up to Da Wendu and arbitrary temp below described conversion permissible temperature higher than described.
2. the control gear of internal-combustion engine as claimed in claim 1, wherein,
Described control device is from SO in described catalyzer at the described Da Wendu of being up to
2to SO
3conversion ratio when becoming below the conversion permissible temperature of below admissible value, described sulphur is departed from temperature and is set to described conversion permissible temperature.
3. the control gear of internal-combustion engine as claimed in claim 1 or 2, wherein,
Described control device periodically made the bed temperature of exhaust or described catalyzer rise before the described sulphur of arrival departs from temperature.
4. as the control gear of the internal-combustion engine in claims 1 to 3 as described in any one, wherein,
Described control device, when the particulate regeneration of described filter requires to set up and has the delivery temperature rising requirement in the downstream side of described catalyzer, makes the oxygen concentration in the waste gas flowed into described catalyzer be reduced to below the upper limit threshold of the oxygen concentration corresponding with the sulphur concentration value in the fuel carrying out burning in described internal-combustion engine.
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| JP2013-059016 | 2013-03-21 | ||
| JP2013059016A JP5895884B2 (en) | 2013-03-21 | 2013-03-21 | Control device for internal combustion engine |
| PCT/JP2014/055497 WO2014148249A1 (en) | 2013-03-21 | 2014-03-04 | Controlling device for internal combustion engines |
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| Publication Number | Publication Date |
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| CN105189959A true CN105189959A (en) | 2015-12-23 |
| CN105189959B CN105189959B (en) | 2017-09-05 |
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| JP (1) | JP5895884B2 (en) |
| KR (1) | KR101783116B1 (en) |
| CN (1) | CN105189959B (en) |
| DE (1) | DE112014001523B4 (en) |
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| CN110925065A (en) * | 2019-12-17 | 2020-03-27 | 东风汽车集团有限公司 | Active regeneration grading control method for particle catcher |
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| JP6036786B2 (en) * | 2014-10-17 | 2016-11-30 | トヨタ自動車株式会社 | Internal combustion engine sulfur concentration determination system |
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| JP5056725B2 (en) | 2008-11-04 | 2012-10-24 | トヨタ自動車株式会社 | Control device for internal combustion engine |
-
2013
- 2013-03-21 JP JP2013059016A patent/JP5895884B2/en active Active
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2014
- 2014-03-04 KR KR1020157025442A patent/KR101783116B1/en active IP Right Grant
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| CN2767669Y (en) * | 2004-03-15 | 2006-03-29 | 广州市新力金属有限公司 | Exhaust particle catcher for diesel engine |
| CN1779214A (en) * | 2004-11-26 | 2006-05-31 | 三菱自动车工业株式会社 | Exhaust emission control device of internal combustion engine |
| CN101096923A (en) * | 2006-06-26 | 2008-01-02 | 福特环球技术公司 | Method for operating a combustion engine having a four-way catalyst |
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| CN110925065B (en) * | 2019-12-17 | 2021-11-12 | 东风汽车集团有限公司 | Active regeneration grading control method for particle catcher |
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|---|---|
| KR20150119366A (en) | 2015-10-23 |
| DE112014001523T5 (en) | 2015-12-10 |
| CN105189959B (en) | 2017-09-05 |
| KR101783116B1 (en) | 2017-09-28 |
| JP2014185527A (en) | 2014-10-02 |
| JP5895884B2 (en) | 2016-03-30 |
| WO2014148249A1 (en) | 2014-09-25 |
| DE112014001523B4 (en) | 2023-08-17 |
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