CN101975128B - Pressureproof combined type fuel tank of column plastic pipe - Google Patents
Pressureproof combined type fuel tank of column plastic pipe Download PDFInfo
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- CN101975128B CN101975128B CN2010105469328A CN201010546932A CN101975128B CN 101975128 B CN101975128 B CN 101975128B CN 2010105469328 A CN2010105469328 A CN 2010105469328A CN 201010546932 A CN201010546932 A CN 201010546932A CN 101975128 B CN101975128 B CN 101975128B
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- reducing agent
- carbamide reducing
- withstand voltage
- voltage body
- carbamide
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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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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- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention relates to a column plastic pipe pressureproof combined type fuel tank. On the basis of the traditional automobile fuel tank, a column plastic pipe is combined to be a urea reducing agent pressureproof pipe body and a urea reducing agent dosage control box, so that one tank body has three functions, compact design is realized, thus being beneficial to beautiful design of vehicle, mounting of connecting pieces is reduced, vehicle allocation is simplified, and weight is reduced, thereby not only meeting the SCR standard more than China 4 but also reducing system cost.
Description
Technical field
The present invention relates to the pressure-withstanding combined oil tank of a post plastic tube, may be used on the reprocessing industry of vehicle exhaust.
Background technique
In the coming years, the car manufactures, particularly US and European in the whole world will forcibly be implemented some severeer specifications about the emission compliance aspect of automobile nitrogen oxide NOx and particulate PM.Under the driving of Abgasgesetz, external automobile-used heavy-duty diesel engine just constantly carries out technology upgrading and improvement on the one hand, on the other hand, select appropriate post-processing technology strategy and equipment, for example, SCR (Selective Catalytic Reduction) catalyzed conversion reduction technique, DPF(Diesel Particulate Filter) particle trap, DOC(Diesel Oxidation Catalyst) oxidation catalyst etc.
The essence of SCR technology is to utilize urea at high temperature to decomposite NH
3, as the NH of reducing agent
3With the NO in the engine exhaust
xUnder the comprehensive function of catalyzer and temperature, react, generate nontoxic N under the desirable operating mode
2And H
2O, thus reach the purpose of purification.SCR has lot of advantages, for example, can have 50～85% NO in the scope of the delivery temperature 250～550oC of diesel-oil vehicle
xRemove efficient, and can effectively reduce the emission level of PM; SCR can easily satisfy Europe IV and Europe V level, also has the potentiality that reach Europe VI level; The SCR catalyzer does not contain precious metal, and is more relatively low than cost; SCR is to the quality of fuel oil for vehicles, and particularly Sulpher content is insensitive.Based on above analysis, the SCR post-processing technology is vehicle condition and the fuel oil for vehicles situation of suitable China also.
If apply the vehicle-mounted SCR post-processing technology in China, must resolve the technological difficulties such as atomized spray, SCR catalyzer conversion efficiency, ammonia amount of leakage of dosage, the carbamide reducing agent of carbamide reducing agent supply, carbamide reducing agent.
For the vehicle of estimating to realize state's IV discharging, its motor has been finished the optimization in the machine, NO
XEliminating rate can satisfy state's IV emission standard, NO 35 ~ 40%
XEliminating rate can satisfy state's V emission standard 65 ~ 70%.Only need to connect upper SCR after-treatment device in the imagination and just can be used as state's IV 0vehicle marketing, the problem of in fact facing is far above this; Adopt the SCR after-treatment device of a whole set of import, cost up to 12000 ~ 15000 yuan/cover, wherein, urea-spray and control section just account for 2500 ~ 4000 yuan, and in case damage, can not guarantee to keep in good repair, must integral replacing, expense user is difficult to bear.
SCR system to mark offshore company, find it all is that concept with ' unit or module ' designs, for example, batching unit and control unit (DCU and ECU), namely relevant signal measurement, feedback, control and actuator are integrated, be conducive to layout and installation on car load.But, these inlet units expensive.
Otherwise, if do not adopt DCU and the ECU unit module of external import, and the position such as the operator cabin that the unit module of needed each function of SCR system or component are separately fixed at truck and vehicle frame, not only take up room, and the layout of pipeline can seem in disorder, in addition, separately fixedly the carriage of carbamide reducing agent case (steel or cast iron) just weigh more than the 18kg; The random layout of these unit modules or component is installed also the easily integrity problem of production part.
When selecting the mode of movement of carbamide reducing agent, can adopt pump power, this requires the reliability of micropump very high, 4000 hours fault-free of continuous operation for example, price is slightly high; Also can adopt source of high pressure air as power, for example, from the high-pressure air that the gas receiver of brake is carried, filter rear as power source.
After being input to carbamide reducing agent casing liquid level top for source of high pressure air, drive carbamide reducing agent to urea reducing agent nozzle as power again, adopt the hydrostatic column of corrosion resistant plate welding fabrication, cost is slightly high; And the square container of employing corrosion resistant plate welding fabrication, not only the weight of casing is large, and cost is high, and the welding difficulty is large.
Consider that carbamide reducing agent can be with most engineering plastics, for example polypropylene (PP) and polyethylene (PE) tubing have good compatibility, and, polypropylene (PP) and polyethylene (PE) tubing are lightweight, cost is low, ample supply and prompt delivery are easy to adopt the technique of standard to carry out blowing and hot melt is processed into needed shape and volume.
Patent searching is found, is not also had patent of the same type to declare.
Summary of the invention
The object of the present invention is to provide a kind of pressure-withstanding combined oil tank of a post plastic tube, adopt conventional automotive oil tank to carry out the transformation of structure, make it to become three casees, be fuel tank, carbamide reducing agent case and ECU (Electrical Control Unit) case, three is case integrated, and beautiful shape is easy to install and maintain, solved installation and the Layout Problem of SCR system, more convenient realization is produced in enormous quantities.
Technological scheme of the present invention is to realize like this, the pressure-withstanding combined oil tank of one post plastic tube is by accurate filter, accurate gas solenoid valve, accurate pressure maintaining valve, the aerodynamic force pipeline, control unit independently, the liquid precision solenoid valve, the carbamide reducing agent output tube, the withstand voltage body of carbamide reducing agent, the carbamide reducing agent case lid, fuel tank lock, the carbamide reducing agent liquid level sensor, the fuel oil casing, the carbamide reducing agent discharge valve, the fuel oil discharge valve, the turnover assembled casing, the carbamide reducing agent delivery pipe, power lead, the pressurized air supplying tube, the pressurized air output tube, temperature feedback signal line from catalytic converter, nitrogen oxide feedback signal line from catalytic converter, be input to the carbamide reducing agent liquid level warning signaling line of operator cabin, the casing used for jointing soldering points, natural ventilation port, the electric control box ventilated port, seaming end cap buckle, electric control box, Steel Support, upper pipe plug, the welding pair tube, lower pipe plug, plastic pipe clip, yielding support Jiao Dui, the welding area consists of; It is characterized in that: a side is the fuel oil casing, the withstand voltage body of intermediate arrangement carbamide reducing agent, and opposite side is electric control box; The volume capacity of fuel oil casing is 15 ~ 30 times of the withstand voltage body of carbamide reducing agent, and a side of electric control box is provided with seaming end cap buckle; The withstand voltage body of carbamide reducing agent and upper pipe plug and lower pipe plug thermal fusion welding are integrated; Fuel oil casing and electric control box Combined oil tank are that the whole corrosion resistant plate that adopts is welded, the thickness 1.2mm ~ 1.5mm of corrosion resistant plate, and material is SUS304 or SUS441; The withstand voltage body of carbamide reducing agent wherein is provided with the carbamide reducing agent case lid, the compressed-air power supplying tube is positioned at pipe plug and links to each other with accurate pressure maintaining valve, the carbamide reducing agent output tube is connected on the lower pipe plug of the withstand voltage body of carbamide reducing agent and links to each other with accurate filter, the withstand voltage body of carbamide reducing agent is provided with liquid level sensor, and the carbamide reducing agent discharge valve is located at the withstand voltage body of carbamide reducing agent bottom; Be fixedly connected on the casing with plastic pipe clip; Yielding support Jiao Dui is fixed on pipe plug and the lower pipe plug, and its length at the combination fuel tank is L
2
The external diameter of the withstand voltage body of described carbamide reducing agent is 110 ~ 460mm, wall thickness 8 ~ 26mm; Under 0.3 ~ 0.7Mpa constant voltage, finish the sealing test of suppressing of 30min behind the fusion molding.
The internal chamber wall of described electric control box is provided with two accurate filters that filter respectively pressurized air and carbamide reducing agent that are fixed on both sides, the air mass flow of urea nozzle and urea box liquid level and the accurate pressure maintaining valve of pressure are transported in an accurate gas solenoid valve and two adjustings, and the ON/OFF of control air constantly; Three liquid precision solenoid valves are connected in parallel, set different carbamide reducing agent flow control scopes, independently control unit is fixed on the base plate, Steel Support is fixedly accurate filter, accurate gas solenoid valve, accurate pressure maintaining valve and liquid precision solenoid valve respectively, be provided with carbamide reducing agent delivery pipe, power lead, pressurized air supplying tube, pressurized air output tube in the turnover assembled casing, from the temperature feedback signal line of catalytic converter, from the nitrogen oxide feedback signal line of catalytic converter, be input to the carbamide reducing agent liquid level warning signaling line of operator cabin; Wherein carbamide reducing agent delivery pipe, power lead, from the temperature feedback signal line of catalytic converter, from the nitrogen oxide feedback signal line of catalytic converter, be input to the carbamide reducing agent liquid level warning signaling line of operator cabin and link to each other with control unit independently, the pressurized air supplying tube links to each other with accurate filter, the pressurized air output tube with link to each other with the accurate pressure maintaining valve of air mass flow and pressure; Natural ventilation port, electric control box ventilated port, seaming end cap buckle consist of the whole of control box; The length of this part is L
3
The length of described fuel oil casing and the withstand voltage body of carbamide reducing agent is L
1/ L
2=3 ~ 10; The withstand voltage body of carbamide reducing agent can be installed in vehicle frame, compartment or the operator cabin.
Described withstand voltage body can be the withstand voltage body of combination that employing is threaded and forms between the plastic pipe, or adopts the withstand voltage body of combination that is threaded and makes between plastic pipe and the stainless steel metal pipe fitting.
The material of described withstand voltage body is plastics, can be the tubing of PP polypropylene or PE polyethylene or PP polypropylene and PE polyethylene and ethylene copolymers.
Comprise the auxiliary urea reducing agent spraying system of air take high-pressure air as power source in the described Combined oil tank, the pressure of high-pressure air is 0.15 ~ 0.3Mpa.
Good effect of the present invention is to adopt conventional automotive oil tank to carry out the transformation of structure, make it to become three casees, be fuel tank, carbamide reducing agent case and ECU (Electrical Control Unit) case, three is case integrated, beautiful shape is easy to install and maintain, and has solved installation and the Layout Problem of SCR system, more convenient realization is produced in enormous quantities, has very high reliability and use value.
Description of drawings
Fig. 1 is the plan view of Combined oil tank of the present invention.
Fig. 2 is the left view of Combined oil tank of the present invention.
Fig. 3 is the schematic representation of the withstand voltage body of carbamide reducing agent of the present invention.
Fig. 4 is the right elevation of Combined oil tank of the present invention.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples: shown in Fig. 1-4,Be used for the above Combined oil tank of state's IV, casing is that the selection material is SUS304 or SUS441 corrosion resistant plate, its thickness is 1.2mm ~ 1.5mm, according to the manufacturing process of fuel tank of vehicle, the whole corrosion resistant plate that adopts is welded, and makes respectively fuel oil casing 12 first, reserve the space of the assembling withstand voltage body 8 of carbamide reducing agent and electric control box 20, wherein, fuel oil casing 12 need to be finished the sealing test of suppressing of 30min under the 0.08Mpa constant voltage, guarantees without leaking; And then make and the assembling withstand voltage body of carbamide reducing agent (8), the straight tube material of the welding pair tube 23 that carbamide reducing agent is withstand voltage body 8 is required, can be from market purchasing, also can order to producer, spatial altitude size cutting according to fuel tank, the external diameter of recommending this tubing is 110 ~ 460mm, wall thickness 8 ~ 26mm, the net capacity size that the wall thickness of the external diameter removal pipe of pipe obtains is with the weight of the carbamide reducing agent that holds, fuel tank h2 calculates according to 600mm, when the external diameter of a post plastic tube is 110mm, the thickness of deduction tube wall, this moment, the net volume of one post plastic tube was about 4L, can fill carbamide reducing agent and be about 4kg, appropriately satisfied the consumption of 2 ~ 3 days carbamide reducing agents of SCR system of city bus; When the external diameter of a post plastic tube is 360mm, the thickness of deduction tube wall, this moment, the net volume of one post plastic tube was about 51L, can fill carbamide reducing agent and be about 51kg, satisfied the SCR system of long-distance medium and heavy car; When the external diameter of a post plastic tube too hour, for example, when 100mm was following, not only the useful load of carbamide reducing agent was too little, even cancellation L
3The space, at L
2Arranged simultaneously withstand voltage body and control unit in the space, still have the problem of the space waste of fuel tank, otherwise when the external diameter of a post plastic tube was too large, for example, during for 460mm, the useful load of carbamide reducing agent approximately can reach more than the 90kg this moment, considered L
3The space must keep, the processing of the hot melt of the casing of this post plastic tube will be adopted special-purpose equipment, install and fixing also existence bothers; Recommend L
1/ L
2=3 ~ 10, work as L
1/ L
2, as if make L at=3 o'clock
1Volume reducing, fuel filling compartment are every minimizing, and still, present automotive oil tank all is the mode that main fuel tank adds drop tank, and the present invention implements in the segment space of main fuel tank or drop tank, does not affect the whole distance travelled of vehicle; L
2The space that is used for specially installing the withstand voltage body body of carbamide reducing agent, L
3The space that control unit is installed, in certain technological scheme, L
2Still have remaining ' space ' after the withstand voltage body of carbamide reducing agent is installed, and be enough to install and be installed in the original plan L
3Control unit in the space just can be installed on two side box bodies of the withstand voltage body of carbamide reducing agent, at this moment L
3Just and L
2Merge into a space, make this Combined oil tank compacter; The height of h2 should comprise height, the height of upper pipe plug 22, the height of welding pair tube 23 and the height of lower pipe plug 24 of 2 yielding support glue heaps 26, removes the h3 height of 2 welding areas; Upper pipe plug 22 and lower pipe plug 24 can be from market purchasings, also can order on request to producer, upper pipe plug 22 has preferably been reserved the hot melt interface of aerodynamic force pipeline 4 and carbamide reducing agent case lid 9 in advance, the rear tapping of also can holing, adopt the stainless steel threaded fitting to connect, be used for the filling of carbamide reducing agent, equally, lower pipe plug 24 will have been reserved carbamide reducing agent output tube 7, carbamide reducing agent liquid level sensor 11 and carbamide reducing agent discharge valve 13 hot melt interfaces in advance, the rear tapping of also can holing adopts the stainless steel threaded fitting to connect; Upper pipe plug 22, welding pair tube 23 and lower pipe plug 24 become the main body of withstand voltage body according to the hot melt joint technology of routine; The mounting point height h of carbamide reducing agent liquid level sensor 11
1Height h with the withstand voltage body 8 of carbamide reducing agent
2Proportionate relationship be h
1/ h
2=1/5, calculate that thus this position should finish at lower pipe plug 24; It is stainless steel or the plastic fast-acting joint of φ 4 ~ 6mm that aerodynamic force pipeline 4 and carbamide reducing agent output tube 7 can adopt internal diameter, and the same pipe plug and lower pipe plug carry out the hot melt joint or be threadedly engaged with linking into an integrated entity; Carbamide reducing agent case lid 9 is to be plastic tube or the same pipe plug realization hot melt of stainless steel threaded pipe of φ 30 ~ 60mm or to be threaded by internal diameter, carbamide reducing agent case lid 9 can adopt special lid, to be different from fuel tank lock 10, one of its purpose is the difference of opening shape, to be different from circular hole on the fuel tank lock, prevent from adding mutually between fuel oil and the carbamide reducing agent mistake, two of its purpose is unidirectional vent valves that combination has standard, can enter air by trace so that can be in the carbamide reducing agent case during liquid negative pressure, regulate pressure, in order to avoid produce negative pressure; Carbamide reducing agent liquid level sensor 11 and carbamide reducing agent discharge valve 13 are also carried out hot melt with lower pipe plug 24 or be threadedly engaged with, finish the complete making of the withstand voltage body 8 of carbamide reducing agent; Plastic pipe clip 25 is can be from the standard piece of market purchasing, also can order, its effect is the fixing withstand voltage body 8 of carbamide reducing agent, prevent move left and right, 2 ~ 5 of plastic pipe clip 25 recommendations, being less than 2 can't fix, unnecessary 5 restrictions that are subject to the space, plastic pipe clip 25 also can adopt ' pulling rivet ' fixing with adopting bolt to fix between the casing; That recommends yielding support glue heap 26 respectively uses up and down 3 ~ 6, place inboard yielding support glue heap 26 at assigned position first, and be bonded on the casing with industrial adhesive, after withstand voltage body 8 integral body are put the inlet body carbamide reducing agent, again the yielding support glue of top heap 26 firmly is pressed into, and be bonded on the casing with industrial adhesive, also can adopt foamed glue to fill small gap, realizes firm fixing; Also can adopt foamed glue to fix fully, the vehicle of this moment be more suitable in travelling under the condition preferably at urban traffic situation; After finishing withstand voltage body 8 installations of carbamide reducing agent, next included two accurate filters 1 that are fixed on both sides of control box 20 are installed again, an accurate gas solenoid valve 2 and two accurate pressure maintaining valves 3, three or more liquid precision solenoid valves 6, and control unit 5, adopt respectively one group of Steel Support 21 to be fixed on the base plate with upper-part, also can adopt the punched-plate of making after 1 ~ 3 sheetmetal punching, the two ends of this punched-plate are fastened on the both sides of casing, and the way that relevant undersized electrical equipment original paper is fixed on the punched-plate is installed; Liquid precision solenoid valve 6 is recommended 3 of minimum employings, adopts at most 6, and when quantity was 3, carbamide reducing agent can provide 7 dosage platforms, and degree of accuracy meets the demands, and after quantity surpassed 6, shared cost proportion was too large; At last, connect compressed-air power inlet opening 4, carbamide reducing agent output tube 7, turnover assembled casing 15, carbamide reducing agent delivery pipe 15-1, power lead 15-2, pressurized air output tube 15-3, pressurized air supplying tube 15-4, from the temperature feedback signal line 15-5 of catalytic converter, from the nitrogen oxide feedback signal line 15-6 of catalytic converter, be input to the carbamide reducing agent liquid level warning signaling line 15-7 of operator cabin; Make natural ventilation port 17 and electric control box ventilated port 18 keep unimpeded; Seaming end cap buckle 19 is fixed; From this combination fuel tank afterwards observation is installed onboard, fuel oil casing 12 arranges that onboard positions are apart from the distance of motor farthest, and carbamide reducing agent casing 7 and electric control box 20 arranges that onboard positions are nearest apart from motor, and this Combined oil tank adopts carriage to be fixed on the vehicle frame; Carbamide reducing agent case lid 9 and fuel tank lock 10 are towards the outside, compartment; Finish the present invention with this thinking.
Embodiment 1
Selecting material is SUS304 or SUS441 corrosion resistant plate, and its thickness is 1.2mm, and the spatial volume of fuel oil casing 12 and carbamide reducing agent are withstand voltage body 8 concerns L
1/ L
2=4, the volume of fuel oil casing 12 is 200L, and the spatial volume of carbamide reducing agent is withstand voltage body 8 is 50L; According to the manufacturing process of fuel tank of vehicle, the whole corrosion resistant plate that adopts is welded, and makes respectively fuel oil casing 12, reserves the space of placing the withstand voltage body 8 of carbamide reducing agent and electric control box 20; Wherein, fuel oil casing 12 is finished the sealing test of suppressing of 30min in advance under the 0.08Mpa constant voltage; Fuel tank lock 10 and fuel oil discharge valve 14 are installed respectively on fuel oil casing 12; Carbamide reducing agent is withstand voltage, and body 8 employing external diameters are 110mm, and wall thickness is that the post PP plastic pipe hot melting of 10mm forms, at this moment L
3=0; The carbamide reducing agent capacity reaches 4.2L, and through 0.3Mpa, 30min suppresses detection; Finish the connection that connects compressed-air power inlet opening 4, carbamide reducing agent output tube 7, carbamide reducing agent discharge valve 13, carbamide reducing agent case lid 9, carbamide reducing agent liquid level sensor 11; Then the elements under the casing of the withstand voltage body of carbamide reducing agent 8 both sides is finished electric control box 20 are installed, and finish respectively with one group of Steel Support 21 fixing of accurate filter 1, accurate gas solenoid valve 2, accurate pressure maintaining valve 3, control unit 5, liquid precision solenoid valve 6 is installed; Then the assembled casing 15 of turnover electric control box 20 is installed, comprising dosage pipe 15-1, the power lead 15-2 of carbamide reducing agent, pressurized air supplying tube 15-3, pressurized air output tube 15-4, from the temperature feedback signal line 15-5 of catalytic converter, from the nitrogen oxide feedback signal line 15-6 of catalytic converter, be input to the carbamide reducing agent liquid level warning signaling line 15-7 of operator cabin; Make natural ventilation port 17 and electric control box ventilated port 18 keep unimpeded; Seaming end cap buckle 19 is fixed.Be configured for the above Combined oil tank of state's IV.
Of the present invention for the Combined oil tank more than state's IV, annotate simultaneously full-scale fuel oil and carbamide reducing agent, the consumption rate of carbamide reducing agent is 1/25 ~ 1/30 of fuel oil, annotating can guarantee 500 ~ 600 kilometers of Vehicle Driving Cycles behind a carbamide reducing agent, satisfies the SCR system of the above vehicle of state's IV of short-distance or city bus.
Embodiment 2
Selecting material is SUS304 or SUS441 corrosion resistant plate, and its thickness is 1.2mm, and the spatial volume of fuel oil casing 12 and carbamide reducing agent are withstand voltage body 8 concerns L
1/ L
2=3, the volume of fuel oil casing 12 is 300L, and the spatial volume of carbamide reducing agent is withstand voltage body 8 is about 100L; According to the manufacturing process of fuel tank of vehicle, the whole corrosion resistant plate that adopts is welded, and makes respectively fuel oil casing 12, reserves the space of placing the withstand voltage body 8 of carbamide reducing agent and electric control box 20; Wherein, fuel oil casing 12 is finished the sealing test of suppressing of 30min in advance under the 0.08Mpa constant voltage; Fuel tank lock 10 and fuel oil discharge valve 14 are installed respectively on fuel oil casing 12; Carbamide reducing agent is withstand voltage, and body 8 employing external diameters are 200mm, and wall thickness is that the post PP plastic pipe hot melting of 10mm forms, at this moment L3=0; The carbamide reducing agent capacity reaches 15.3L, and through 0.3Mpa, 30min suppresses detection; Finish the connection that connects compressed-air power inlet opening 4, carbamide reducing agent output tube 7, carbamide reducing agent discharge valve 13, carbamide reducing agent case lid 9, carbamide reducing agent liquid level sensor 11; Then the elements under the casing of the withstand voltage body of carbamide reducing agent 8 both sides is finished electric control box 20 are installed, and finish respectively with one group of Steel Support 21 fixing of accurate filter 1, accurate gas solenoid valve 2, accurate pressure maintaining valve 3, control unit 5, liquid precision solenoid valve 6 is installed; Then the assembled casing 15 of turnover electric control box 20 is installed, comprising dosage pipe 15-1, the power lead 15-2 of carbamide reducing agent, pressurized air supplying tube 15-3, pressurized air output tube 15-4, from the temperature feedback signal line 15-5 of catalytic converter, from the nitrogen oxide feedback signal line 15-6 of catalytic converter, be input to the carbamide reducing agent liquid level warning signaling line 15-7 of operator cabin; Make natural ventilation port 17 and electric control box ventilated port 18 keep unimpeded; Seaming end cap buckle 19 is fixed.Be configured for the above Combined oil tank of state's IV.
Of the present invention for the Combined oil tank more than state's IV, annotate simultaneously full-scale fuel oil and carbamide reducing agent, the consumption rate of carbamide reducing agent is 1/25 ~ 1/30 of fuel oil, annotating can guarantee 2000 ~ 3000 kilometers of Vehicle Driving Cycles behind a carbamide reducing agent, satisfies the SCR system of the above vehicle of state's IV of medium sized vehicle or city bus.
Selecting material is SUS304 or SUS441 corrosion resistant plate, and its thickness is 1.2mm, and the spatial volume of fuel oil casing 12 and carbamide reducing agent are withstand voltage body 8 concerns L
1/ L
2=4, the volume of fuel oil casing 12 is 600L, and the spatial volume of carbamide reducing agent is withstand voltage body 8 is about 150L; According to the manufacturing process of fuel tank of vehicle, the whole corrosion resistant plate that adopts is welded, and makes respectively fuel oil casing 12, reserves the space of placing the withstand voltage body 8 of carbamide reducing agent and electric control box 20; Wherein, fuel oil casing 12 is finished the sealing test of suppressing of 30min in advance under the 0.08Mpa constant voltage; Fuel tank lock 10 and fuel oil discharge valve 14 are installed respectively on fuel oil casing 12; Carbamide reducing agent is withstand voltage, and body 8 employing external diameters are 360mm, and wall thickness is that the post PP plastic pipe hot melting of 12mm forms, at this moment L3=0; The carbamide reducing agent capacity reaches 51L, and through 0.3Mpa, 30min suppresses detection; Finish the connection that connects compressed-air power inlet opening 4, carbamide reducing agent output tube 7, carbamide reducing agent discharge valve 13, carbamide reducing agent case lid 9, carbamide reducing agent liquid level sensor 11; Then the elements under the casing of the withstand voltage body of carbamide reducing agent 8 both sides is finished electric control box 20 are installed, and finish respectively with one group of Steel Support 21 fixing of accurate filter 1, accurate gas solenoid valve 2, accurate pressure maintaining valve 3, control unit 5, liquid precision solenoid valve 6 is installed; Then the assembled casing 15 of turnover electric control box 20 is installed, comprising dosage pipe 15-1, the power lead 15-2 of carbamide reducing agent, pressurized air supplying tube 15-3, pressurized air output tube 15-4, from the temperature feedback signal line 15-5 of catalytic converter, from the nitrogen oxide feedback signal line 15-6 of catalytic converter, be input to the carbamide reducing agent liquid level warning signaling line 15-7 of operator cabin; Make natural ventilation port 17 and electric control box ventilated port 18 keep unimpeded; Seaming end cap buckle 19 is fixed.Be configured for the above Combined oil tank of state's IV.
Of the present invention for the Combined oil tank more than state's IV, annotate simultaneously full-scale fuel oil and carbamide reducing agent, the consumption rate of carbamide reducing agent is 1/25 ~ 1/30 of fuel oil, annotating can guarantee 1000 ~ 1500 kilometers of Vehicle Driving Cycles behind a carbamide reducing agent, satisfies the SCR system of the above vehicle of heavy vehicle state IV.
Claims (7)
1. the pressure-withstanding combined oil tank of a post plastic tube is by accurate filter (1), accurate gas solenoid valve (2), accurate pressure maintaining valve (3), aerodynamic force pipeline (4), control unit (5) independently, liquid precision solenoid valve (6), carbamide reducing agent output tube (7), the withstand voltage body of carbamide reducing agent (8), carbamide reducing agent case lid (9), fuel tank lock (10), carbamide reducing agent liquid level sensor (11), fuel oil casing (12), carbamide reducing agent discharge valve (13), fuel oil discharge valve (14), turnover assembled casing (15), carbamide reducing agent delivery pipe (15-1), power lead (15-2), pressurized air supplying tube (15-3), pressurized air output tube (15-4), temperature feedback signal line (15-5) from catalytic converter, nitrogen oxide feedback signal line (15-6) from catalytic converter, be input to the carbamide reducing agent liquid level warning signaling line (15-7) of operator cabin, casing used for jointing soldering points (16), natural ventilation port (17), electric control box ventilated port (18), seaming end cap buckle (19), electric control box (20), Steel Support (21), upper pipe plug (22), welding pair tube (23), lower pipe plug (24), plastic pipe clip (25), yielding support Jiao Dui (26), welding area (27) consists of; It is characterized in that: a side is fuel oil casing (12), and the withstand voltage body of intermediate arrangement carbamide reducing agent (8), opposite side are electric control box (20); The volume capacity of fuel oil casing (12) is 15 ~ 30 times of the withstand voltage body of carbamide reducing agent (8), and a side of electric control box (20) is provided with seaming end cap buckle (19); The withstand voltage body of carbamide reducing agent (8) and upper pipe plug (22) and lower pipe plug (24) thermal fusion welding are integrated; Combined oil tank is that the whole corrosion resistant plate that adopts is welded, the thickness 1.2mm ~ 1.5mm of corrosion resistant plate, and material is SUS304 or SUS441; The withstand voltage body of carbamide reducing agent wherein (8) is provided with carbamide reducing agent case lid (9), compressed-air power supplying tube (4) is positioned at pipe plug (22) and links to each other with accurate pressure maintaining valve (3), carbamide reducing agent output tube (7) is connected to lower pipe plug (24) and upward links to each other with accurate filter (1), the withstand voltage body of carbamide reducing agent (8) is provided with liquid level sensor (11), and carbamide reducing agent discharge valve (13) is located at the withstand voltage body of carbamide reducing agent bottom; Be fixedly connected on the casing with plastic pipe clip (25); Yielding support Jiao Dui (26) is fixed on pipe plug and the lower pipe plug, and the withstand voltage body of carbamide reducing agent (8) is L in the length of combination fuel tank
2
2. the pressure-withstanding combined oil tank of a post plastic tube according to claim 1, the external diameter that it is characterized in that the withstand voltage body of described carbamide reducing agent (8) is 110 ~ 460mm, wall thickness 8 ~ 26mm; Under 0.3 ~ 0.7Mpa constant voltage, finish the sealing test of suppressing of 30min behind the fusion molding.
3. the pressure-withstanding combined oil tank of a post plastic tube according to claim 1, the internal chamber wall that it is characterized in that described electric control box (20) is provided with: two accurate filters that filter respectively pressurized air and carbamide reducing agent (1) that are fixed on both sides, the control air mass flow of urea nozzle and urea box liquid level and the accurate pressure maintaining valve (3) of pressure are transported in an accurate gas solenoid valve (2) and two adjustings, three liquid precision solenoid valves (6) that are connected in parallel, liquid precision solenoid valve (6) has been set different carbamide reducing agent flow control scopes, independently control unit (5) is fixed on the base plate, Steel Support (21) is fixing accurate filter (1) respectively, accurate gas solenoid valve (2), accurate pressure maintaining valve (3) and liquid precision solenoid valve (6) are provided with carbamide reducing agent delivery pipe (15-1) in the turnover assembled casing (15), power lead (15-2), pressurized air supplying tube (15-3), pressurized air output tube (15-4), temperature feedback signal line (15-5) from catalytic converter, nitrogen oxide feedback signal line (15-6) from catalytic converter, be input to the carbamide reducing agent liquid level warning signaling line (15-7) of operator cabin; Wherein carbamide reducing agent delivery pipe (15-1), power lead (15-2), from the temperature feedback signal line (15-5) of catalytic converter, from the nitrogen oxide feedback signal line (15-6) of catalytic converter, be input to the carbamide reducing agent liquid level warning signaling line (15-7) of operator cabin and link to each other with control unit (5) independently, pressurized air supplying tube (15-3) links to each other with accurate filter (1), and pressurized air output tube (15-4) links to each other with accurate pressure maintaining valve (3); Natural ventilation port (17), electric control box ventilated port (18), seaming end cap buckle (19) consist of control box; The length of electric control box is L3.
4. the pressure-withstanding combined oil tank of a post plastic tube according to claim 1 is characterized in that described fuel oil casing (12) and the Length Ratio of the withstand voltage body of carbamide reducing agent (8) are L
1/ L
2=3 ~ 10; The withstand voltage body of carbamide reducing agent (8) is installed in vehicle frame, compartment or the operator cabin.
5. the pressure-withstanding combined oil tank of a post plastic tube according to claim 1, it is characterized in that described withstand voltage body is to adopt the withstand voltage body of combination that is threaded and forms between the plastic pipe, or adopt the withstand voltage body of combination that is threaded and makes between plastic pipe and the stainless steel metal pipe fitting.
6. the pressure-withstanding combined oil tank of a post plastic tube according to claim 1, the material that it is characterized in that described withstand voltage body is the tubing of PP polypropylene or PE polyethylene or PP polypropylene and PE polyethylene and ethylene copolymers.
7. the pressure-withstanding combined oil tank of a post plastic tube according to claim 1 is characterized in that comprising in the described Combined oil tank the auxiliary urea reducing agent spraying system of air take high-pressure air as power source, and the pressure of high-pressure air is 0.15 ~ 0.3Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105469328A CN101975128B (en) | 2010-11-17 | 2010-11-17 | Pressureproof combined type fuel tank of column plastic pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105469328A CN101975128B (en) | 2010-11-17 | 2010-11-17 | Pressureproof combined type fuel tank of column plastic pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101975128A CN101975128A (en) | 2011-02-16 |
| CN101975128B true CN101975128B (en) | 2013-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105469328A Expired - Fee Related CN101975128B (en) | 2010-11-17 | 2010-11-17 | Pressureproof combined type fuel tank of column plastic pipe |
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| CN (1) | CN101975128B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116851865B (en) * | 2023-09-04 | 2023-11-07 | 烟台盈德精密机械有限公司 | Vehicle urea solution nozzle brazing device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1645452A1 (en) * | 2004-10-08 | 2006-04-12 | Iveco S.p.A. | Integrated tank for urea, vehicle provided with this tank and method for storing urea solutions on a vehicle |
| CN101595284A (en) * | 2007-06-26 | 2009-12-02 | 日立建机株式会社 | Self-propelled engineer machinery |
| CN201538231U (en) * | 2009-12-09 | 2010-08-04 | 陕西重型汽车有限公司 | Combined urea oil box |
| CN201856634U (en) * | 2010-11-17 | 2011-06-08 | 中国第一汽车集团公司 | Pressure-proof combined oil tank for plastic pipe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0807173D0 (en) * | 2008-04-19 | 2008-05-21 | Agco Gmbh | Exhaust gas treatment system |
-
2010
- 2010-11-17 CN CN2010105469328A patent/CN101975128B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1645452A1 (en) * | 2004-10-08 | 2006-04-12 | Iveco S.p.A. | Integrated tank for urea, vehicle provided with this tank and method for storing urea solutions on a vehicle |
| CN101595284A (en) * | 2007-06-26 | 2009-12-02 | 日立建机株式会社 | Self-propelled engineer machinery |
| CN201538231U (en) * | 2009-12-09 | 2010-08-04 | 陕西重型汽车有限公司 | Combined urea oil box |
| CN201856634U (en) * | 2010-11-17 | 2011-06-08 | 中国第一汽车集团公司 | Pressure-proof combined oil tank for plastic pipe |
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| Publication number | Publication date |
|---|---|
| CN101975128A (en) | 2011-02-16 |
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