CN101680334A - A system and method for purifying exhaust gas for a diesel vehicle using fuel borne catalyst - Google Patents
A system and method for purifying exhaust gas for a diesel vehicle using fuel borne catalyst Download PDFInfo
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- CN101680334A CN101680334A CN200880015327A CN200880015327A CN101680334A CN 101680334 A CN101680334 A CN 101680334A CN 200880015327 A CN200880015327 A CN 200880015327A CN 200880015327 A CN200880015327 A CN 200880015327A CN 101680334 A CN101680334 A CN 101680334A
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
- F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
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- 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
- F01N3/029—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 by adding non-fuel substances to exhaust
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- 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
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
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- 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
- F01N2560/05—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a particulate sensor
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- 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
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
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- 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
- F01N2610/01—Adding substances to exhaust gases the substance being catalytic material in liquid form
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
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- 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
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
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- 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
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1473—Overflow or return means for the substances, e.g. conduits or valves for the return path
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
The present invention relates to a system and method for purifying exhaust gas for diesel vehicles using fuel borne catalyst (here-in-after, referred to as ''FBC'') which is applied to enhance the efficiency of purifying exhaust gas by maintaining optimum FBC concentration. The object of the present invention is to provide a system and method for purifying exhaust gas for diesel vehicles using a fuel borne catalyst, which can easily raise the temperature of exhaust gas in a short time at the time of regeneration, by maintaining the concentration of the fuel borne catalyst constant in any driving situation.
Description
Technical field
The present invention relates to use the system and method for fuel borne catalyst (fuel borne catalyst hereinafter is called " FBC ") purification of diesel car waste gas, use this system and method, improve the efficient of purifying exhaust air by keeping optimum FBC concentration.
Background technique
Compare with gasoline car, the Engine Durability of diesel-oil vehicle is better, and the high 20%-30% of efficient.Diesel-oil vehicle is because its superior function at fuel efficiency and power output facet has been applied to large vehicle, for example truck and bus.In addition, because the advantage of diesel-oil vehicle is that they discharge a spot of CO
2, CO, THC and volatilizable hydrocarbon, little to the influence of global warming, so diesel-oil vehicle is applied to small-sized and motor medium sized vehicle just progressively.Therefore, in developed country, continue to increase for the demand of small-sized and medium-sized diesel-oil vehicle.Yet a large amount of nitrogen oxide (NOx) that contain in the diesel-oil vehicle waste gas and particulate matter (PM, particulate matter) are acknowledged as the air-polluting main cause, account for up to whole air-polluting 40%.Therefore, to the strict environmental constraint of implementing of the manufacturing of diesel-oil vehicle.About the emission standard of nitrogen oxide and particulate matter, have balance between each country, and each country controls the degree of generation according to policy requirements.Oil price along with we see today attracts much attention than the higher diesel-oil vehicle of conventional gasoline car efficient.Therefore, developed country is setting up step by step to from the stricter restriction of the pollutant load of diesel-oil vehicle waste gas, and to reduce the discharging of the air pollutant that produced, this directly relates to the manufacturing of diesel-oil vehicle.
The reply technology that satisfies the emission of diesel engine regulation is divided into two groups: preconditioning technique is used for by improving the structure of fuel oil, combustion process or motor, the generation source of reducing pollutant; And post-processing technology, be used for purifying the waste gas that is produced by the equipment of exhaust ports.Though all carried out the research and development that continue in each field, till now, post-processing technology has more research and development progress, is considered to more help actual use.These post-processing technologies comprise: (1) oxidation catalyst, be used for the unburned hydrocarbon of particulate matter matter (PM), (2) diesel particulate filter (diesel particulate filter, hereinafter be called " DPF "), be used to filter PM, (3) DeNOx catalysis system is used for decomposing or reducing nitrogen oxide (NOx) under the reduction atmosphere.At present, adopt the after-treatment system of hybrid type widely, wherein, make up above-mentioned various technology effectively, for example be equipped with the DPF system of catalyst filter.
Be used for the legacy system of purifying exhaust air, flow into the exhaust gas particle thing (PM) that comprises in the waste gas of diesel engine particles filtration system and caught, thereby these particulate matters removed at least 90% ground by the diesel engine particles filtration system.When PM was saturated, the diesel engine particles filtration system not only can be lost its capture ability, and can be by thereon back pressure and disturb the driving of motor.Therefore, need a kind of method to remove PM saturated in the diesel engine particles filtration system (being called regeneration).As a kind of regeneration method, widely used method is: diesel oil is sprayed in the waste gas that flows in the diesel particulate filter system, cause the raise temperature of waste gas of spontaneous combustion, and the waste gas of heat is flow in the diesel engine particles filtration system, to burn the PM that catches in the diesel engine particles filtration system.
Demonstrate some problems in this system that is used for purifying exhaust air.At first, the most serious problem is: suitably the temperature of the regeneration diesel particulate filter system and the waste gas that raises time of making it possible to regenerate is oversize.
Continuing under the situation of powered vehicle, for actual conditions, in the vehicle that drives on highway for a long time, the temperature of waste gas even a spot of diesel injection also can easily raise is because the temperature of the waste gas that comes out from motor has been hot.On the other hand, if powered vehicle discontinuously, then for actual conditions, in the frequent vehicle of driving/stop (for example, urban transit bus) repeatedly, the temperature of the waste gas that is difficult to fully to raise at short notice.
For regeneration, temperature should be increased to 400 ℃ or higher usually.Well-knownly be that by using the legacy system of purifying exhaust air, under the situation of the vehicle of frequent stop, exhaust gas temperature is increased to described temperature needs about 10 minutes.
In order to realize being rapidly heated, the conventional art of interpolation fuel borne catalyst (fuel oil additive) has been proposed.Yet this is not basic solution because along with the consumption of diesel oil, add catalyst concentration at the refueling process intermediate fuel oil and change always, and since the zooming effect of temperature that fuel borne catalyst causes die-off in time.Therefore, those skilled in the art solve the demand of this class problem in continuous increase.
Summary of the invention
Technical problem
The present invention is used to overcome the problem of aforesaid conventional art.The object of the present invention is to provide the system and method that uses fuel borne catalyst purification of diesel car waste gas, it keeps constant by the concentration that all makes fuel borne catalyst under any driving situation, the temperature of the waste gas that can easily raise at short notice when regeneration.
Technological scheme
In order to realize aforesaid purpose, comprise according to the system of use fuel borne catalyst purification of diesel car waste gas of the present invention: motor (100); Fuel tank (200), it is connected to described motor (100), is used to supply or return the fuel supply line (221) and the return tube (222) of diesel oil; Diesel engine particles filtration system (300), the outlet (110) that it is connected to described motor (100) is used for purifying waste gas and pollutant from described motor (100), thereby it is discharged into the outside; Be assemblied in the oil spout unit (400) of the front end of described diesel engine particles filtration system (300), it is connected to described fuel tank (200), and comprises ascending pipe (431), injection pump (410), injection syringe (420) and Circulation pipe (432) successively; And control unit (500), the saturation state of its detection and definite described diesel engine particles filtration system (300), to control the operation of described injection unit (400), described system also comprises: catalyst tank (610), and it is used to hold fuel borne catalyst (FBC); Catalyzer ascending pipe (630), one side are connected to described catalyst tank (610), and opposite side is connected to described waste gas cleaning system, to provide and being communicated with of described fuel borne catalyst; Catalyzer injection syringe (620), it is assemblied on the described catalyzer ascending pipe (630), is used for making described fuel borne catalyst to be injected into described diesel oil and mixes with it, so that keep described diesel oil intermediate fuel oil to add catalyst concentration consistently; And catalyzer injection unit (600), its operation is controlled by described control unit (500).
Described control unit (500) determines to inject by described catalyzer that based on the residue diesel oil amount in the described fuel tank (200) aequum of the fuel borne catalyst that injects unit (600), described residue diesel oil amount are by for level meter (210) measurement of described fuel tank (200) device.In addition, the diesel oil liquid level (h) that measures when described level meter (210) just be changed to (+) time, described control unit (500) determines that it is in the fuel feeding state, and be changed to just (+) this variation afterwards and and then become 0 or when negative (-) when described, described control unit (500) determines that it is in the fuel feeding finishing stage, and calculate that fuel feeding begins and the difference of liquid level (Δ h) of fuel feeding between finishing, and described control unit (500) is determined to inject the aequum of the described diesel catalytic converter of unit (600) injection by described catalyzer based on described difference of liquid level (Δ h).
The opposite side of catalyzer ascending pipe according to the present invention (630) is connected to described Circulation pipe (432), perhaps is connected to described return tube (222).
A kind of system according to purifying exhaust air of the present invention, method of use fuel borne catalyst purification of diesel car waste gas of having adopted comprises the steps: that a) described control unit detection is by the variation of diesel oil liquid level in the described fuel tank of level meter measurement; B) described control unit determines whether the variation of described diesel oil liquid level becomes just (+); C) when the variation of determining described diesel oil liquid level just became (+), described control unit was defined as the fuel feeding starting point with this point, and writes down the diesel oil liquid level (h of this point
0); D) described control unit detects the variation of the diesel oil liquid level in the described fuel tank that measures by described level meter once more; E) the described control unit variation whether vanishing (0) or negative (-) that determine described diesel oil liquid level; F) when the variation vanishing (0) of determining described diesel oil liquid level in the step e) or negative (-), described control unit is defined as fuel feeding with this point and finishes a little, and writes down the diesel oil liquid level (h of this point
f); G) described control unit calculates the diesel oil liquid level (h of described fuel feeding starting point
0) finish a little diesel oil liquid level (h with described fuel feeding
f) between difference of liquid level (Δ h=h
f-h
0); H) described control unit is based on described difference of liquid level (Δ h), calculates the required injection amount (q) of the concentration requirement that is used to satisfy described fuel borne catalyst; And i) described control unit is operated the described required injection amount (q) that described catalyzer injection unit injects the above fuel borne catalyst that calculates.The described concentration requirement of described fuel borne catalyst is in the scope of 170ppm to 230ppm.
Beneficial effect
According to the present invention, even the exhaust gas temperature of discharging at motor is not under the sufficiently high situation, for example be interrupted and changeable drive condition under or such as the having in the vehicle that low-power exports of automobile, also keep the concentration of the fuel borne catalyst that comprises in the diesel oil consistently.Therefore, in the regenerative process of diesel engine particles filtration system, the temperature of the waste gas that can easily raise at short notice makes the regeneration of diesel engine particles filtration system to finish more efficiently.
In addition, can significantly reduce make for the regeneration diesel particulate filter system exhaust gas temperature rise the enough high diesel oil amount that consumes.Therefore, in the fuel efficiency of whole vehicle, obtained significant improvement effect.
According to the present invention, the concentration of the fuel borne catalyst that comprises in the diesel oil (it is described more than effect) can keep constant always automatically.Therefore, above-mentioned effect changes in time or can be solved according to the problem that fuel consume or fuel feeding change.Therefore, under any circumstance, can obtain aforesaid stablizing effect always.
Description of drawings
Fig. 1 is the schematic representation that is used for the system of purifying exhaust air according to of the present invention.
Fig. 2 is the flow chart that is used for the method for purifying exhaust air according to of the present invention.
Fig. 3 is the schematic description of each variable.
The explanation of the label of pith in the＜accompanying drawing 〉
100: motor
110: outlet
The 120:PRM sensor
200: fuel tank
210: level meter
221: fuel supply line
222: return tube
300: the diesel engine particles filtration system
310: outlet pipe
321: pressure transducer
322,323: temperature transducer
400: inject the unit
410: injection pump
420: injection syringe
431: ascending pipe
432: Circulation pipe
500: control unit
600: catalyzer injects the unit
610: catalyst tank
620: the catalyzer injection syringe
630: the catalyzer ascending pipe
Embodiment
Now, by the reference accompanying drawing describe in more detail have as above constitute, according to the system of use fuel borne catalyst purification of diesel car waste gas of the present invention.
Fig. 1 illustrates the schematic representation according to the system of use fuel borne catalyst purification of diesel car waste gas of the present invention.The system that is used for purifying exhaust air according to the present invention comprises: by the motor (100) of diesel driven; Be connected to the fuel tank (200) of described motor (100), it is by fuel supply line (221) supply diesel oil and by the residue diesel oil in return tube (222) return engine; Diesel engine particles filtration system (300), the outlet (110) that it is connected to motor (100) is used for purifying waste gas and pollutant from motor (100), and it is discharged into the outside; Inject unit (400), it comprises: ascending pipe (431), and a side of this ascending pipe (431) is connected to described fuel tank (200) and opposite side is connected to injection syringe (420); Injection pump (410), it is assemblied on the ascending pipe (431), to be communicated with diesel oil; Be assemblied in the injection syringe (420) of the front end of described diesel engine particles filtration system (300), it injects diesel oil to cause spontaneous combustion in described diesel engine particles filtration system (300) when being in saturation state, flow into the exhaust gas temperature of diesel engine particles filtration system (300) to raise, thereby make diesel engine particles filtration system (300) regeneration, and be not to close injection syringe (420) when being in saturation state in diesel engine particles filtration system (300); And Circulation pipe (432), the one side is connected to described injection syringe (420) and opposite side is connected to described fuel tank (200), and when injection syringe (420) when being closed, the diesel oil that flows through ascending pipe (431) is turned back in the described fuel tank (200); And control unit (500), its detection is also determined the saturated of described diesel engine particles filtration system (300), to control the operation of described injection unit (400).Described in addition system also comprises: catalyst tank (610), and it is used to hold fuel borne catalyst (FBC); Catalyzer ascending pipe (630), one side are connected to described catalyst tank (610), and opposite side is connected to described waste gas cleaning system, to provide and being communicated with of fuel borne catalyst; Catalyzer injection syringe (620), it is assemblied on the catalyzer ascending pipe (630), is used for making fuel borne catalyst to be injected into diesel oil and mixes with it, so that keep the diesel oil intermediate fuel oil to add catalyst concentration consistently; And catalyzer injection unit (600), its operation is controlled by described control unit (500).Below describe in more detail according to system of the present invention on the whole.
The motor (100) that is connected to fuel tank (200) by fuel supply line (221) comes work by the diesel oil supply.Commonly, diesel oil does not have full consumption, but has remaining diesel oil for the motor (100) that uses diesel oil.For this situation, between motor (100) and fuel tank (200), return tube (222) is set, so that remaining diesel oil in the motor (100) is turned back in the fuel tank (200).Comprise the waste gas produced waste gas of motor (100) and when process is connected to the diesel engine particles filtration system (300) of outlet (110), be cleaned, and by outlet pipe (310) discharging.Diesel engine particles filtration system (300) adopts aforesaid various post-processing technologies.Usually adopt DPF (diesel engine particles filtration) system of the filter that is provided with coated catalysts, but any device can be set removes the pollutant that contains particulate matter.
When particulate matter (PM) becomes saturated in diesel engine particles filtration system (300) or when saturated, the ability of catching PM may reduce, and since back pressure cause in the engine-driving process, serious problem may occurring.Therefore, need avoid the measure of this situation.Under the situation of using diesel oil, if the injection syringe (420) that is connected with fuel tank (200) be arranged on diesel engine particles filtration system (300) the ingress and with diesel injection in the waste gas to cause spontaneous combustion, raise by force thus and flow into the exhaust gas temperature of described diesel engine particles filtration system (300), then can utilize the hot waste gas that forms thus, remove saturated PM in the diesel engine particles filtration system (300) by burning.
For regeneration diesel particulate filter system (300) as described above, should suitably spray diesel oil from injection syringe (420).Therefore, the employing the whole bag of tricks is measured the saturation ratio in the diesel engine particles filtration system (300).At present, be provided with RPM sensor (120) and pressure transducer (321) in the diesel engine particles filtration system (300) and temperature transducer (322,323) in the motor (100), and the variable of the pressure difference of rotating speed (rpm), pressure and temperature or diesel engine particles filtration system (300) front end and the back segment of control unit (500) use motor (100) and temperature difference etc., calculate saturation ratio, thereby can suitably control the operation of injecting unit (400), regulate diesel oil amount to be sprayed thus.These variablees that control unit (500) adopts can have various variations according to the position and the quantity of design and the sensor that therefore will be provided with.
As shown in Figure 1, injecting unit (400) is made up of injection pump (410), injection syringe (420), ascending pipe (431) and Circulation pipe (432) usually.When diesel engine particles filtration system (300) becomes saturated or when saturated, injection syringe (420) injects diesel oil by injection pump (410) via ascending pipe (431) as mentioned above.On the other hand, when diesel engine particles filtration system (300) is not in saturation state, when not needing fuel injection, closes injection syringe (430), and turn back to fuel tank (200) via Circulation pipe (432) by the diesel oil that ascending pipe (431) provides.
Except the formation of common cleaning system, waste gas cleaning system according to the present invention also comprises: catalyst tank (610), and it holds fuel borne catalyst (FBC); Catalyzer ascending pipe (630), it makes described catalyst tank (610) be connected with described waste gas cleaning system; And catalyzer injection unit (600), it comprises the injection syringe (620) that is arranged on the catalyzer ascending pipe (630).For the concentration that makes the fuel borne catalyst that comprises in the diesel oil keeps constant, the controlled unit of catalyzer injection syringe (620) (500) control is suitably injected fuel borne catalyst according to the variation of diesel oil amount.
When fuel borne catalyst mixes with diesel oil with suitable concentration, in the temperature of waste gas that diesel injection can very rapidly be raise in the waste gas that flows into diesel engine particles filtration system (300) time.Therefore, even under the situation of the diesel car of the urban transit bus of frequent stop/starting repeatedly or the waste gas that temperature is lower because the low-power of motor is exported, also regeneration diesel particulate filter system (300) efficiently.Yet when consuming diesel oil and vehicle along with driving and refueled again, the rapid drawdown after refueling of the concentration of the fuel borne catalyst in the diesel oil that fuel tank (200) is held is not because the diesel oil that has just added comprises fuel borne catalyst.By full consumption and by under the situation of refueling, certainly, the concentration of fuel borne catalyst also just approaches zero (0) at diesel oil.In this case, the intensification effect of waste gas sharply reduces.Therefore, be added with oil, the power of regeneration variation of diesel engine particles filtration system (300) along with returning.
In order to overcome this problem, system of the present invention is provided with catalyst tank (610) in vehicle, suitably to inject fuel borne catalyst in diesel oil, makes the concentration of the fuel borne catalyst in the diesel oil keep constant thus.In other words, if diesel oil is consumed and refueled again, then inject the fuel borne catalyst of appropriate amount in addition, to keep the concentration of fuel borne catalyst, therefore the temperature of waste gas can rise rapidly fully, with regeneration diesel particulate filter system (300), and no matter the type of vehicle or how drive.
The volume read-out of diesel oil directly relates to the aequum of fuel borne catalyst to be injected.Therefore, control unit (500) calculates the amount of diesel oil by the level meter (210) that is provided with in the fuel tank (200), and correspondingly calculates the aequum of fuel borne catalyst to be injected, and injects unit (600) with the operation catalyzer.
Fig. 1 (A) shows the example that catalyzer ascending pipe (630) is connected to Circulation pipe (432).In the time of in fuel borne catalyst being injected into Circulation pipe (432), fuel borne catalyst can mix effectively with the diesel oil in the fuel tank (200), so that can more easily realize as mentioned above because the intensification effect that fuel borne catalyst causes.
Perhaps, catalyzer ascending pipe (630) can be connected to return tube (222), as shown in Fig. 1 (B).
If fuel borne catalyst directly is injected in the fuel tank (200), then its disperses fully, thereby makes and be difficult to mix, and causes the concentration difference of the fuel borne catalyst of each position thus.Shown in Fig. 1 (A) or Fig. 1 (B), connect catalyzer ascending pipe (630) in the active position (for example locating) of flowing of diesel oil and can overcome this problem at Circulation pipe (432) or return tube (222).
Fig. 2 illustration according to the mode of execution in stage of injection fuel borne catalyst of the present invention, and Fig. 3 has described each variable.Simple with reference to variable shown in Figure 3, S is the basal area of fuel tank; H is the liquid level of diesel oil; h
0It is the liquid level of diesel oil when the diesel oil supply begins; h
fIt is the liquid level of diesel oil when the diesel oil supply is finished; And q is the flow velocity of fuel borne catalyst.
By reference Fig. 2 stage according to injection fuel borne catalyst of the present invention is described.At first, control unit detects the variation (S101) by the measured diesel oil liquid level of the level meter that is provided with in the fuel tank continuously.In running, the diesel oil amount reduces continuously, and only occurs diesel oil liquid level rising (liquid level change of diesel oil becomes just (+)) here when refueling.Therefore, just become (+) (S102) time when detect liquid level change by control unit, control unit is defined as the fuel feeding starting point with this point, and the liquid level (h at record fuel feeding starting point place
0) (S103).By (S104) in the level meter continuous detecting diesel oil liquid level change, when detecting liquid level change vanishing (0) or negative (-) (S105) time, control unit is defined as fuel feeding with this point and finishes a little, and the record fuel feeding is finished liquid level (h a little
f) (S106).Control unit calculates the liquid level (h of fuel feeding starting point
0) finish a little liquid level (h with fuel feeding
f) between poor (Δ h) (S107).By using this difference of liquid level (Δ h), calculate the diesel oil amount of the supply that makes new advances, control unit is measured based on this then, calculates the aequum (S108) of the fuel borne catalyst that will inject in addition for the concentration that keeps fuel borne catalyst.The employed calculating formula of control unit can following simple expression.Each variable is identical with variable among Fig. 3 in the formula, and c is a scale factor.The optium concentration of fuel borne catalyst and more preferably is about 200ppm preferably in the scope of 170ppm to 230ppm.Therefore, determine that c obtains optium concentration to design according to the user.
q＝cΔh
(Δh＝h
f-h
0)
Control unit operation catalyzer injects the aequum (S109) of the injection fuel borne catalyst that is calculated the unit more than fuel tank injects.Therefore, even, also can automatically keep the concentration of fuel borne catalyst thus owing to refueling diesel oil fuel tank is filled with do not contain fuel borne catalyst.
The invention is not restricted to above example, but can be widely used in various industrial fields.Be apparent that under the situation that does not depart from the desired main idea of the present invention of claims, any technician in field can revise and put into practice the present invention under the present invention.
Claims (7)
1, a kind of system that uses fuel borne catalyst purification of diesel car waste gas, this system comprises: motor (100); Fuel tank (200), it is connected to described motor (100), is used to supply or return the fuel supply line (221) and the return tube (222) of diesel oil; Diesel engine particles filtration system (300), the outlet (110) that it is connected to described motor (100) is used for purifying waste gas and pollutant from described motor (100), and it is discharged to the outside; Be assemblied in the injection unit (400) of the front end of described diesel engine particles filtration system (300), it is connected to described fuel tank (200), and comprises ascending pipe (431), injection pump (410), injection syringe (420) and Circulation pipe (432) successively; And control unit (500), its detection is also determined the saturation state of described diesel engine particles filtration system (300), controlling the operation of described injection unit (400),
Described system also comprises: catalyst tank (610), and it is used to hold fuel borne catalyst (FBC); Catalyzer ascending pipe (630), one side are connected to described catalyst tank (610), and opposite side is connected to described waste gas cleaning system, to provide and being communicated with of described fuel borne catalyst; Catalyzer injection syringe (620), it is assemblied on the described catalyzer ascending pipe (630), is used for making described fuel borne catalyst to be injected into described diesel oil and mixes with it, to keep the concentration of fuel borne catalyst described in the described diesel oil consistently; And catalyzer injection unit (600), its operation is controlled by described control unit (500).
2, the system of use fuel borne catalyst purification of diesel car waste gas according to claim 1, wherein, described control unit (500) determines to inject by described catalyzer that based on the residue diesel oil amount in the described fuel tank (200) aequum of the fuel borne catalyst that injects unit (600), described residue diesel oil amount are by for level meter (210) measurement of described fuel tank (200) assembling.
3, the system of use fuel borne catalyst purification of diesel car waste gas according to claim 2, wherein, the diesel oil liquid level (h) that measures when described level meter (210) just be changed to (+) time, described control unit (500) determines that it is in the fuel feeding state, and be changed to just (+) this variation afterwards and and then become 0 or when negative (-) when described, described control unit (500) determines that it is in the fuel feeding finishing stage, and calculates that fuel feeding begins and the difference of liquid level (Δ h) of fuel feeding between finishing
And described control unit (500) determines to inject by described catalyzer the aequum of the diesel catalytic converter that injects unit (600) based on described difference of liquid level (Δ h).
4, according to the system of each the described use fuel borne catalyst purification of diesel car waste gas in the claim 1 to 3, wherein, the opposite side of described catalyzer ascending pipe (630) is connected to described Circulation pipe (432).
5, according to the system of each the described use fuel borne catalyst purification of diesel car waste gas in the claim 1 to 3, wherein, the opposite side of described catalyzer ascending pipe (630) is connected to described return tube (222).
6, a kind of method of using fuel borne catalyst purification of diesel car waste gas, described method has adopted the system of purifying exhaust air according to claim 1, and described method comprises the steps:
A) described control unit detects the variation of diesel oil liquid level in the fuel tank of measuring by level meter;
B) described control unit determines whether the variation of described diesel oil liquid level becomes just (+);
C) when the variation of determining described diesel oil liquid level just became (+), described control unit was defined as the fuel feeding starting point with this point, and writes down the diesel oil liquid level (h of this point
0);
D) described control unit detects the variation of the diesel oil liquid level in the described fuel tank that measures by described level meter once more;
E) the described control unit variation whether vanishing (0) or negative (-) that determine described diesel oil liquid level;
F) when the variation vanishing (0) of determining described diesel oil liquid level in step e) or negative (-), described control unit is defined as fuel feeding with this point and finishes a little, and writes down the diesel oil liquid level (h of this point
f);
G) described control unit calculates the diesel oil liquid level (h of described fuel feeding starting point
0) finish a little diesel oil liquid level (h with described fuel feeding
f) between difference of liquid level (Δ h=h
f-h
0);
H) described control unit calculates the required injection amount (q) of concentration requirement that satisfies described fuel borne catalyst based on described difference of liquid level (Δ h);
I) described control unit is operated the required injection amount (q) that described catalyzer injection unit injects the above fuel borne catalyst that calculates.
7, the method for use fuel borne catalyst purification of diesel car waste gas according to claim 6, wherein, the concentration requirement of described fuel borne catalyst is in the scope of 170ppm to 230ppm.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020070045466 | 2007-05-10 | ||
| KR10-2007-0045466 | 2007-05-10 | ||
| KR1020070045466A KR101290525B1 (en) | 2007-05-10 | 2007-05-10 | A System and Method for Purifying Exhaust Gas for a Diesel Vehicle using Fuel Borne Catalyst |
| PCT/KR2008/002538 WO2008140204A2 (en) | 2007-05-10 | 2008-05-06 | A system and method for purifying exhaust gas for a diesel vehicle using fuel borne catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101680334A true CN101680334A (en) | 2010-03-24 |
| CN101680334B CN101680334B (en) | 2012-11-07 |
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ID=40002744
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008800153279A Expired - Fee Related CN101680334B (en) | 2007-05-10 | 2008-05-06 | A system and method for purifying exhaust gas for a diesel vehicle using fuel borne catalyst |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2142769A4 (en) |
| JP (1) | JP2010526959A (en) |
| KR (1) | KR101290525B1 (en) |
| CN (1) | CN101680334B (en) |
| WO (1) | WO2008140204A2 (en) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2714694B1 (en) * | 1993-12-30 | 1996-03-15 | Peugeot | Method and device for variable dosing of regeneration additive for particulate filters. |
| KR970001119B1 (en) * | 1995-04-03 | 1997-01-28 | 창원기화기공업 주식회사 | Car loading type adding fuel automatic supply device |
| DE19805311B4 (en) * | 1997-02-18 | 2010-06-10 | Walbro Corp., Cass City | Apparatus and method for adding fuel additives |
| US6276310B1 (en) * | 2000-01-07 | 2001-08-21 | Ford Global Technologies, Inc. | Fuel additive dosing method and system for onboard vehicle use |
| JP2002242661A (en) * | 2001-02-14 | 2002-08-28 | Shuya Nagayama | Combustor for exhaust emission control of diesel engine |
| DE10112361A1 (en) * | 2001-03-15 | 2002-10-10 | Bayerische Motoren Werke Ag | Fuel tank for motor vehicle has dispenser of additive to be added to fuel; additive is dispensed near suction side of pump, which circulates fuel within tank |
| JP2004324587A (en) * | 2003-04-25 | 2004-11-18 | Mitsubishi Fuso Truck & Bus Corp | Emission control device of internal combustion engine |
| EP1536110A1 (en) | 2003-11-26 | 2005-06-01 | Delphi Technologies, Inc. | Catalysed exhaust gas soot filter |
| KR100636392B1 (en) * | 2004-07-22 | 2006-10-18 | 한국기계연구원 | Additive dosing system |
| FR2887302A1 (en) * | 2005-06-21 | 2006-12-22 | Peugeot Citroen Automobiles Sa | Additive forming unit introducing device for motor vehicle fuel tank, has control case associated to units analyzing moving conditions of vehicle to control pump and injector to adapt additive concentration in fuel to conditions |
| CN1896467A (en) * | 2005-07-11 | 2007-01-17 | 中国人民解放军军事交通学院 | Method and regenerator for discharging microgranular filter by oxy-acid fuel catalytic combustion regenerative diesel engine |
| WO2007024781A1 (en) * | 2005-08-22 | 2007-03-01 | Envirofuels, Llc | On-board fuel additive injection systems |
-
2007
- 2007-05-10 KR KR1020070045466A patent/KR101290525B1/en active IP Right Grant
-
2008
- 2008-05-06 JP JP2010507319A patent/JP2010526959A/en not_active Withdrawn
- 2008-05-06 WO PCT/KR2008/002538 patent/WO2008140204A2/en active Application Filing
- 2008-05-06 EP EP08753335.2A patent/EP2142769A4/en not_active Withdrawn
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2008140204A2 (en) | 2008-11-20 |
| CN101680334B (en) | 2012-11-07 |
| EP2142769A2 (en) | 2010-01-13 |
| EP2142769A4 (en) | 2014-03-05 |
| KR101290525B1 (en) | 2013-07-30 |
| JP2010526959A (en) | 2010-08-05 |
| WO2008140204A3 (en) | 2008-12-31 |
| KR20080099650A (en) | 2008-11-13 |
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