CN202756066U - Automobile and selective catalyst reduction (SCR) system thereof - Google Patents
Automobile and selective catalyst reduction (SCR) system thereof Download PDFInfo
- Publication number
- CN202756066U CN202756066U CN2012203083430U CN201220308343U CN202756066U CN 202756066 U CN202756066 U CN 202756066U CN 2012203083430 U CN2012203083430 U CN 2012203083430U CN 201220308343 U CN201220308343 U CN 201220308343U CN 202756066 U CN202756066 U CN 202756066U
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- urea
- pipe
- tube
- carbamide
- scr
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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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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a selective catalyst reduction (SCR) system which comprises three carbamide pipes, wherein the three carbamide pipes are respectively a carbamide suction pipe, a carbamide return pipe and a pressure pipe. At least one of the carbamide suction pipe, the carbamide return pipe and the pressure pipe is provided with a resistor element. When the environment temperature is lower than a set temperature, the resistor element is connected with a circuit and a current flows in the resistor element, and then the resistor element is heated up so as to further heat the carbamide pipe. Thus, heating the carbamide pipe is achieved. Compared with the prior art, the resistor element is used to heat the carbamide pipe so that a thickened heating pipe is not needed to be sleeved on the carbamide pipe and size of the SCR system is not added. And the carbamide pipe is heated only by the resistor element and heated water is not needed to conduct heat so that weight of the SCR system is not greatly increased. The utility model further discloses an automobile with the SCR system.
Description
Technical field
The utility model relates to technical field of vehicle manufacture, relates in particular to the SCR system, and the utility model also 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 satisfy national quadravalence section motor vehicle emission standard, the SCR system need to work under low temperature environment, therefore need to arrange in a heating system is lower than aqueous solution of urea in ambient temperature the situation of apparent freezing point the SCR system is heated, 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 be at the respectively sheathed thicker heating pipe in the outside of urea suction pipe, urea reflow pipe and pressure tube for the heating water circulation, so not only increased the weight of this SCR system, and increased the volume of this SCR system, make troubles for the layout of this SCR system.In addition, use cooling water that urea tube is heated, heat is transmitted slower, so that rate of heating is slower.
In sum, the problem that how to solve effectively that the SCR system weight is large, volume is not easy to greatly to arrange and rate of heating is slower is present those skilled in the art's urgent problem.
The model utility content
In view of this, first purpose of the present utility model is to provide a kind of SCR system, the problem that the structural design of this SCR system can solve effectively that the SCR system weight is large, volume is not easy to greatly to arrange and rate of heating is slower, second purpose of the present utility model provide a kind of automobile that comprises above-mentioned SCR system.
In order to reach above-mentioned first purpose, the utility model provides a kind of SCR system, it comprises three urea tubes, and be respectively urea suction pipe, urea reflow pipe and pressure tube, have at least one to be the inner urea tube that is provided with resistive element in described urea suction pipe, urea reflow pipe and the pressure tube.
Preferably, described resistive element is the 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 the 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, also be provided with the total relay that all is electrically connected with the resistive element of described urea suction pipe, urea reflow pipe and pressure tube inside.
Preferably, also be provided with minute relay that is electrically connected with the resistive element of described urea suction pipe, urea reflow pipe and pressure tube inside respectively.
A kind of automobile, comprise above-mentioned in each described SCR system.
As shown from the above technical solution, three urea tubes of the SCR system that the utility model provides namely have at least an inside to be provided with the urea tube of resistive element in urea suction pipe, urea reflow pipe and the pressure tube.When ambient temperature is lower than a certain setting temperature, resistive element is connected in the circuit, making has electric current to pass through in the resistive element, and the temperature of resistive element raises, and the temperature of urea tube is raise, thereby has realized the heating to urea tube.Compared with prior art, use resistive element that urea tube is heated, 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 carry out heat transmission with heating water, can not make the weight of this SCR system increase a lot.
In order to reach above-mentioned second purpose, the utility model 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, the problem that SCR provided by the utility model system can solve effectively that weight is large, volume is not easy to greatly to arrange and rate of heating is slower.
Description of drawings
In order to be illustrated more clearly in the technological scheme in the utility model, employed accompanying drawing was done simple the introduction during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying 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 the prior art;
The sectional view of the urea tube of the SCR system that provides among the utility model embodiment is provided Fig. 3;
The structural representation of the connecting circuit of the resistive element of the urea tube inside of the SCR system that provides among the utility model embodiment is provided Fig. 4.
Mark is as follows in the accompanying drawing:
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 purpose of the present utility model is to provide a kind of SCR system, the problem that the structural design of this SCR system can solve effectively that the SCR system weight is large, volume is not easy to greatly to arrange and rate of heating is slower, second purpose of the present utility model provide a kind of automobile that comprises above-mentioned SCR system.
Below in conjunction with the accompanying drawing among the utility model embodiment, the scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making all other embodiments that obtain under the creative work prerequisite, all belong to the scope of the utility model protection.
Three urea tubes of the SCR system that provides among the utility model embodiment, be to have at least an inside to be provided with the urea tube of resistive element 2 in urea suction pipe, urea reflow pipe and the pressure tube, when ambient temperature is lower than a certain setting temperature, resistive element 2 is connected in the circuit, making in the resistive element 2 has electric current to pass through, the temperature of resistive element 2 raises, and the temperature of urea tube is 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 carry out heat transmission with heating water, can not make the weight of this SCR system increase a lot.
Wherein, resistive element 2 can be the PTC resistor tube, and isolation layer all is set on the inner and outer wall of PTC resistor tube, in the time of need to heating, can directly the PTC resistor tube be connected in the circuit, make electric current through the PTC resistor tube, the PTC resistor tube generates heat and then heats its inner urea solution.In addition, the 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, the higher electric current that passes through of its resistance is less, the heat that this PTC resistor tube produces can not increase again, therefore uses the 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 the 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 the urea pump, the resistance wire 21 of urea tube pipe end inside can be set to helical, with the length of the resistance wire that increases the 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 the 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, the higher electric current that passes through of its resistance is less, the heat that this PTC resistance wire produces can not increase again, therefore uses the 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 have the urea tube of resistive element, with the volume of this SCR system of more minimizing with reduce the weight of this SCR system.
In above-described embodiment, the working state of resistance wire in whole circuit for convenient control urea suction pipe, urea reflow pipe and pressure tube inside can arrange the total relay 1 that all links to each other with the resistive element 2 of urea suction pipe, urea reflow pipe and pressure tube inside.Be the convenient working state of resistance wire in whole circuit of controlling respectively urea suction pipe, urea reflow pipe and pressure tube inside, minute relay 3 that links to each other with the resistive element 2 of urea suction pipe, urea reflow pipe and pressure tube inside respectively can also be set simultaneously.
Based on the SCR system that provides in above-described embodiment, the utility model 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.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed is and other embodiments' difference that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, related domain professional and technical personnel can realize or use the utility model.Multiple modification to these embodiments will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from spirit or scope of the present utility model, in other embodiments realization.Therefore, the utility model 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. 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 at least one to be the inner urea tube that is provided with resistive element in described urea suction pipe, urea reflow pipe and the pressure tube.
2. SCR according to claim 1 system is characterized in that, described resistive element (2) is the PTC resistor tube, and is provided with isolation layer on its inner and outer wall.
3. SCR according to claim 1 system is characterized in that, described urea tube is plastic tube, and described resistive element (2) is for resistance wire (21) and be arranged at the inside of the tube wall (22) of described urea tube.
4. SCR according to claim 3 system is characterized in that, the resistance wire of the pipe end inside of described urea tube is helical.
5. SCR according to claim 3 system is characterized in that, described resistance wire is the PTC resistance wire.
6. SCR according to claim 1 system 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 according to claim 6 system is characterized in that, also is provided with the total relay (1) that all is electrically connected with the resistive element (2) of described urea suction pipe, urea reflow pipe and pressure tube inside.
8. SCR according to claim 7 system is characterized in that, also is provided with minute relay (3) that is electrically connected with 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 such as each described SCR system in the claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203083430U CN202756066U (en) | 2012-06-28 | 2012-06-28 | Automobile and selective catalyst reduction (SCR) system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203083430U CN202756066U (en) | 2012-06-28 | 2012-06-28 | Automobile and selective catalyst reduction (SCR) system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202756066U true CN202756066U (en) | 2013-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203083430U Expired - Lifetime CN202756066U (en) | 2012-06-28 | 2012-06-28 | Automobile and selective catalyst reduction (SCR) system thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN202756066U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511033A (en) * | 2012-06-28 | 2014-01-15 | 安徽华菱汽车有限公司 | Automobile and SCR system thereof |
| CN109723618A (en) * | 2018-12-28 | 2019-05-07 | 四川金象赛瑞化工股份有限公司 | Online alternative mean, application and the system of urea pump |
-
2012
- 2012-06-28 CN CN2012203083430U patent/CN202756066U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511033A (en) * | 2012-06-28 | 2014-01-15 | 安徽华菱汽车有限公司 | Automobile and SCR system thereof |
| CN109723618A (en) * | 2018-12-28 | 2019-05-07 | 四川金象赛瑞化工股份有限公司 | Online alternative mean, application and the system of urea pump |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130227 |