CN103511033A - Automobile and SCR system thereof - Google Patents
Automobile and SCR system thereof Download PDFInfo
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- CN103511033A CN103511033A CN201210218688.1A CN201210218688A CN103511033A CN 103511033 A CN103511033 A CN 103511033A CN 201210218688 A CN201210218688 A CN 201210218688A CN 103511033 A CN103511033 A CN 103511033A
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- urea
- scr system
- tube
- pipe
- resistive element
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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
Abstract
The invention discloses an SCR system. The SCR system comprises three urea pipes which are a urea suction pipe, a urea backflow pipe and a pressure pipe. At least one of the urea suction pipe, the urea backflow pipe and the pressure pipe is the urea pipe with resistor elements arranged inside, and when the environment temperature is lower than certain temperature, the resistor elements are connected in a circuit to enable currents to pass through the resistor elements, the temperature of the resistor elements rises, the temperature of the urea pipes rises further, and therefore heating for the urea pipes is achieved. Compared with the prior art, the resistor elements are used for heating the urea pipes, thicker heating pipes do not need to be arranged outside the urea pipes in a sleeved mode any longer, so that the size of the SCR system is not increased; only the resistor elements are used for enabling the temperature of the urea pipes to rise, water is no longer heated to transfer heat, and the weight of the SCR system is not increased too much. The invention further discloses an automobile with the SCR system.
Description
Technical field
The present invention relates to technical field of vehicle manufacture, relate in particular to SCR system, the invention still further relates to a kind of automobile with above-mentioned SCR system.
Background technique
As shown in Figure 1, in the structural design of automobile, SCR(Selective Catalyst Reduction) system is selective catalytic reduction system operating, be arranged on a side of vehicle longeron 01, be mainly used in the exhaust treatment system of diesel engine, mainly comprise urea box 06, urea pump 04, water tank 07 and urea reflow pipe 05, also comprise the urea suction pipe 03 and the pressure tube 02 that are communicated with urea pump 04, wherein, urea suction pipe 03, urea reflow pipe 05 and pressure tube 02 are referred to as urea tube.In order to meet national fourth stage motor vehicle emission standard, SCR system need to work under low temperature environment, therefore a heating system need to be set in the situation that ambient temperature heats SCR system lower than the apparent freezing point of aqueous solution of urea, can work.
In the prior art, urea tube is that urea suction pipe, urea reflow pipe and pressure tube generally adopt engine cooling water to heat, this mode need to circulate for heating water by respectively sheathed thicker heating pipe in the outside of urea suction pipe, urea reflow pipe and pressure tube, so not only increased the weight of this SCR system, and increased the volume of this SCR system, make troubles to the layout of this SCR system.In addition, use cooling water to heat urea tube, heat is transmitted slower, makes rate of heating slower.
In sum, how effectively to solve that SCR system weight is large, volume is not easy to greatly arrange and the slower problem of rate of heating, is current those skilled in the art's urgent problem.
Summary of the invention
In view of this, first object of the present invention is to provide a kind of SCR system, the structural design of this SCR system can solve that SCR system weight is large effectively, volume is not easy to greatly arrange and the slower problem of rate of heating, and second object of the present invention is to provide a kind of automobile that comprises above-mentioned SCR system.
In order to reach above-mentioned first object, the invention provides a kind of SCR system, it comprises three urea tubes, and is respectively urea suction pipe, urea reflow pipe and pressure tube, has one at least for the inner urea tube that is provided with resistive element in described urea suction pipe, urea reflow pipe and pressure tube.
Preferably, described resistive element is PTC resistor tube, and is provided with isolation layer on its inner and outer wall.
Preferably, described urea tube is plastic tube, and described resistive element is resistance wire and the inside that is arranged at the tube wall of described urea tube.
Preferably, the resistance wire of the pipe end inside of described urea tube is helical.
Preferably, described resistance wire is PTC resistance wire.
Preferably, described urea suction pipe, urea reflow pipe and pressure tube are the urea tube that inside is provided with resistive element.
Preferably, be also provided with the total relay being all electrically connected to the resistive element of described urea suction pipe, urea reflow pipe and pressure tube inside.
Preferably, be also provided with minute relay being electrically connected to the resistive element of described urea suction pipe, urea reflow pipe and pressure tube inside respectively.
, comprise the SCR system described in above-mentioned middle any one.
As shown from the above technical solution, three urea tubes of SCR system provided by the invention, have at least an inside to be provided with the urea tube of resistive element in urea suction pipe, urea reflow pipe and pressure tube.When ambient temperature is during lower than a certain setting temperature, resistive element is connected in circuit, making has electric current to pass through in resistive element, and the temperature of resistive element raises, and further makes the temperature of urea tube raise, thereby has realized the heating to urea tube.Compared with prior art, use resistive element to heat urea tube, can be again at its outside sheathed thicker heating pipe, so can not increase the volume of SCR system, and only with resistive element, its temperature is raise, no longer with heating water, carry out heat transmission, can not make the weight of this SCR system increase a lot.
In order to reach above-mentioned second object, the present invention also provides a kind of automobile, and this automobile comprises above-mentioned any SCR system.Because above-mentioned SCR system has above-mentioned technique effect, the automobile with this SCR system also should have corresponding technique effect.
In sum, SCR system provided by the present invention can solve that weight is large effectively, volume is not easy to greatly arrange and the slower problem of rate of heating.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme in the present invention, below the accompanying drawing using during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the sectional layout view of car load;
Fig. 2 is the schematic diagram of SCR system in prior art;
The sectional view of the urea tube that Fig. 3 is the SCR system that provides in the embodiment of the present invention;
The structural representation of the connecting circuit of the resistive element of the urea tube inside that Fig. 4 is the SCR system that provides in the embodiment of the present invention.
In accompanying drawing, mark is as follows:
01-longitudinal beam, 02-pressure tube, 03-urea suction pipe, 04-urea pump, 05-urea reflow pipe, 06-urea box, 07-water tank;
21-resistance wire, 22-tube wall;
The total relay of 1-, 2-resistive element, 3-divide relay.
Embodiment
First object of the present invention is to provide a kind of SCR system, the structural design of this SCR system can solve that SCR system weight is large effectively, volume is not easy to greatly arrange and the slower problem of rate of heating, and second object of the present invention is to provide a kind of automobile that comprises above-mentioned SCR system.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiments.Embodiment based in the present invention, those of ordinary skills, not making all other embodiments that obtain under creative work prerequisite, belong to the scope of protection of the invention.
Three urea tubes of the SCR system providing in the embodiment of the present invention, be in urea suction pipe, urea reflow pipe and pressure tube, to have at least an inside to be provided with the urea tube of resistive element 2, when ambient temperature is during lower than a certain setting temperature, resistive element 2 is connected in circuit, making has electric current to pass through in resistive element 2, the temperature of resistive element 2 raises, and further makes the temperature of urea tube raise, thereby has realized the heating to urea tube.Compared with prior art, use 2 pairs of urea tubes of resistive element to heat, can be again at its outside sheathed thicker heating pipe, so can not increase the volume of SCR system, and only with resistive element 2, its temperature is raise, no longer with heating water, carry out heat transmission, can not make the weight of this SCR system increase a lot.
Wherein, resistive element 2 can be PTC resistor tube, and isolation layer is all set on the inner and outer wall of PTC resistor tube, in the time of need to heating, can directly PTC resistor tube be connected in circuit, make electric current through PTC resistor tube, PTC resistor tube generates heat and then heats its inner urea solution.In addition, PTC resistor tube is a kind of semiconductor resistor with temperature sensitivity, when it surpasses uniform temperature, its resistance value is along with the rising of temperature is interim increasing, its the higher electric current passing through of resistance is less, the heat that this PTC resistor tube produces can not increase again, therefore uses PTC resistor tube as resistive element 2, can prevent over-heating.
In order to reduce fabricating cost, also can use plastic tube and in the inside of the tube wall 22 of plastic tube, resistance wire 21 is set, wherein can connect also can be in parallel for resistance wire 21, in the time of need to heating, directly resistance wire 21 is connected in circuit, make electric current through resistance wire 21, resistance wire 21 generates heat and then heats its inner urea solution.
In order to prevent that from there is urea crystals at the pipe joint place between urea tube and urea pump, the resistance wire 21 of urea tube pipe end inside can be set to helical, to increase the length of the resistance wire of urea tube tube end position, make the generation heat of resistance wire at this place more, and then make the temperature of pipe end higher.
In the present embodiment, resistance wire is PTC resistance wire, equally when the temperature of PTC resistance wire surpasses uniform temperature, its resistance value is along with the rising of temperature is interim increasing, its the higher electric current passing through of resistance is less, the heat that this PTC resistance wire produces can not increase again, therefore uses PTC resistance wire as resistive element 2, can prevent over-heating yet.
Preferably, in above-described embodiment, urea suction pipe, urea reflow pipe and pressure tube all can be used inside to there is the urea tube of resistive element, more to reduce the volume of this SCR system and to reduce the weight of this SCR system.
In above-described embodiment, for the working state of the convenient resistance wire of controlling urea suction pipe, urea reflow pipe and pressure tube inside in whole circuit, the total relay 1 being all connected with the resistive element 2 of urea suction pipe, urea reflow pipe and pressure tube inside can be set.Working state for convenience of the resistance wire of controlling respectively urea suction pipe, urea reflow pipe and pressure tube inside in whole circuit, can also arrange be simultaneously connected with the resistive element 2 of urea suction pipe, urea reflow pipe and pressure tube inside respectively divide relay 3.
SCR system based on providing in above-described embodiment, the present invention also provides a kind of automobile, and this automobile comprises above-mentioned any one SCR system.Because this automobile has adopted the SCR system in above-described embodiment, so the beneficial effect of this automobile please refer to above-described embodiment.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiments, between each embodiment identical similar part mutually referring to.
Above-mentioned explanation to the disclosed embodiments, professional and technical personnel in the field can realize or use the present invention.To these embodiments' multiple modification, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. a SCR system, it comprises three urea tubes, and is respectively urea suction pipe, urea reflow pipe and pressure tube, it is characterized in that, has one at least for the inner urea tube that is provided with resistive element in described urea suction pipe, urea reflow pipe and pressure tube.
2. SCR system according to claim 1, is characterized in that, described resistive element (2) is PTC resistor tube, and is provided with isolation layer on its inner and outer wall.
3. urea tube according to claim 1, is characterized in that, described urea tube is plastic tube, and described resistive element (2) is resistance wire (21) and the inside that is arranged at the tube wall (22) of described urea tube.
4. SCR system according to claim 3, is characterized in that, the resistance wire of the pipe end inside of described urea tube is helical.
5. SCR system according to claim 3, is characterized in that, described resistance wire is PTC resistance wire.
6. SCR system according to claim 1, is characterized in that, described urea suction pipe, urea reflow pipe and pressure tube are the urea tube that inside is provided with resistive element.
7. SCR system according to claim 6, is characterized in that, is also provided with the total relay (1) being all electrically connected to the resistive element (2) of described urea suction pipe, urea reflow pipe and pressure tube inside.
8. SCR system according to claim 7, is characterized in that, is also provided with minute relay (3) being electrically connected to the resistive element (2) of described urea suction pipe, urea reflow pipe and pressure tube inside respectively.
9. an automobile, is characterized in that, comprises the SCR system as described in any one in claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210218688.1A CN103511033A (en) | 2012-06-28 | 2012-06-28 | Automobile and SCR system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210218688.1A CN103511033A (en) | 2012-06-28 | 2012-06-28 | Automobile and SCR system thereof |
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| Publication Number | Publication Date |
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| CN103511033A true CN103511033A (en) | 2014-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210218688.1A Pending CN103511033A (en) | 2012-06-28 | 2012-06-28 | Automobile and SCR system thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201546791U (en) * | 2009-11-19 | 2010-08-11 | 北汽福田汽车股份有限公司 | Urea heating device |
| CN202220644U (en) * | 2011-08-30 | 2012-05-16 | 浙江邦得利汽车环保技术有限公司 | Diesel engine SCR urea pipeline with heating function |
| CN102498270A (en) * | 2009-09-11 | 2012-06-13 | 依米泰克排放技术有限公司 | Feeding device for a reducing agent |
| WO2012081773A1 (en) * | 2010-12-14 | 2012-06-21 | (주)한엑스 | Sensor unit for urea tank having return pipe for thawing frozen water |
| CN202756066U (en) * | 2012-06-28 | 2013-02-27 | 安徽华菱汽车有限公司 | Automobile and selective catalyst reduction (SCR) system thereof |
-
2012
- 2012-06-28 CN CN201210218688.1A patent/CN103511033A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102498270A (en) * | 2009-09-11 | 2012-06-13 | 依米泰克排放技术有限公司 | Feeding device for a reducing agent |
| CN201546791U (en) * | 2009-11-19 | 2010-08-11 | 北汽福田汽车股份有限公司 | Urea heating device |
| WO2012081773A1 (en) * | 2010-12-14 | 2012-06-21 | (주)한엑스 | Sensor unit for urea tank having return pipe for thawing frozen water |
| CN202220644U (en) * | 2011-08-30 | 2012-05-16 | 浙江邦得利汽车环保技术有限公司 | Diesel engine SCR urea pipeline with heating function |
| CN202756066U (en) * | 2012-06-28 | 2013-02-27 | 安徽华菱汽车有限公司 | Automobile and selective catalyst reduction (SCR) system thereof |
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Application publication date: 20140115 |