CN221256908U - Automobile urea injection system - Google Patents
Automobile urea injection system Download PDFInfo
- Publication number
- CN221256908U CN221256908U CN202323538227.5U CN202323538227U CN221256908U CN 221256908 U CN221256908 U CN 221256908U CN 202323538227 U CN202323538227 U CN 202323538227U CN 221256908 U CN221256908 U CN 221256908U
- Authority
- CN
- China
- Prior art keywords
- urea
- hole
- rubber sheet
- air
- urea pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 239000004202 carbamide Substances 0.000 title claims abstract description 77
- 238000002347 injection Methods 0.000 title claims abstract description 23
- 239000007924 injection Substances 0.000 title claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 claims abstract description 18
- 238000010992 reflux Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000002927 oxygen compounds Chemical class 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Abstract
The utility model relates to an automobile urea injection system with stable structure. This kind of car urea injection system is including urea case and urea pump assembly, urea pump assembly is including urea pump and air-vent valve, the urea case passes through the drain pipe and is connected with the urea pump, the urea pump passes through the connecting pipe and is connected with the air-vent valve, the air-vent valve passes through the back flow and is connected with the urea case, be connected with the injection pipe on the connecting pipe, its characterized in that: the pressure regulating valve comprises a valve body and a rubber sheet, wherein the edge of the rubber sheet is fixedly connected in the valve body, and the valve body is provided with a liquid inlet through hole connected with the connecting pipe. The automobile urea injection system can greatly improve the stability of the urea pump assembly by adopting the pneumatic pressure regulating valve.
Description
Technical Field
The utility model relates to an automobile part, in particular to an automobile urea injection system.
Background
With the improvement of national emission requirements, more and more diesel vehicles are required to be additionally provided with an SCR system, and nitrogen oxides are neutralized by urea so as to reduce the pollution of the diesel vehicles to the environment. The core component of the SCR system is a urea pump assembly, and the general urea pump assembly comprises a shell, a pressure sensor, a throttle valve, a regulating valve and a urea pump. The urea pump assembly pumps urea in the urea box to the urea injection unit, and the urea injection unit injects urea and neutralizes nitrogen and oxygen compounds in automobile exhaust. Before the urea pump assembly provides urea for the urea injection unit, the air in the pipeline inside the assembly needs to be exhausted, the air in the pipeline is pumped into the urea box through the regulating valve, and then the urea pump assembly can provide urea liquid for the urea injection unit. The existing pressure regulating valve comprises a valve body and a rubber sheet, wherein the rubber sheet is sealed by a spring, however, the spring of the spring is attenuated along with long-time use, so that the urea pump assembly is problematic.
Disclosure of Invention
In view of the defects in the prior art, the utility model innovatively provides an automobile urea injection system with a stable structure.
This kind of car urea injection system is including urea case and urea pump assembly, urea pump assembly is including urea pump and air-vent valve, the urea case passes through the drain pipe and is connected with the urea pump, the urea pump passes through the connecting pipe and is connected with the air-vent valve, the air-vent valve passes through the back flow and is connected with the urea case, be connected with the injection pipe on the connecting pipe, its characterized in that: the pressure regulating valve comprises a valve body and a rubber sheet, wherein the edge of the rubber sheet is fixedly connected in the valve body, the valve body is provided with a liquid inlet through hole connected with a connecting pipe, the liquid inlet through hole is positioned on one side of the rubber sheet, the valve body is provided with an air pressure through hole connected with an air source, the air pressure through hole is positioned on the other side of the rubber sheet, the periphery of the liquid inlet through hole is provided with a backflow through hole connected with a backflow pipe, and one side of the rubber sheet can be blocked on the liquid inlet through hole.
The contact area of the rubber sheet and the air pressure is larger than the area of the reflux through hole and the liquid inlet through hole covered on the rubber sheet.
The connecting pipe is connected with a pressure sensor, the pressure sensor is connected with a control module, and the control module controls the output of an air source.
According to the automobile urea injection system provided by the utility model, the stability of the urea pump assembly can be greatly improved by adopting the pneumatic pressure regulating valve.
Drawings
FIG. 1 is a schematic diagram of a system of the present utility model;
Fig. 2 is a cross-sectional view of the pressure regulating valve.
Detailed Description
As shown in fig. 1, the automobile urea injection system comprises a urea tank 1 and a urea pump assembly, wherein the urea pump assembly comprises a urea pump 3 and a pressure regulating valve 6, the urea tank 1 is connected with the urea pump 3 through a liquid outlet pipe 2, the urea pump 3 is connected with the pressure regulating valve 6 through a connecting pipe 4, the pressure regulating valve 6 is connected with the urea tank 1 through a return pipe 8, and an injection pipe 5 is connected to the connecting pipe 4. During operation, the urea pump 3 pumps urea in the urea tank 1 out through the liquid outlet pipe 2, and then the urea is sprayed out from the spray nozzle through the connecting pipe 4 and the spray pipe 5, and before the spraying, the air in the pipeline needs to be emptied, so that the pressure regulating valve 6 is also needed to be matched, the pressure regulating valve 6 is firstly opened, and the air pumped by the urea pump 3 flows back into the urea tank 1 through the return pipe 8.
As shown in fig. 2, the pressure regulating valve 6 comprises a valve body 60 and a rubber sheet 64, wherein the edge of the rubber sheet 64 is fixedly connected in the valve body 60, so that the center part of the rubber sheet 64 can move back and forth, the valve body 60 is provided with a liquid inlet through hole 61 connected with the connecting pipe 4, the liquid inlet through hole 61 is positioned at one side of the rubber sheet 64, and urea enters from the liquid inlet through hole 61; the valve body 60 is provided with an air pressure through hole 63 connected with the air source 7, compressed air of the air source 7 enters the air pressure through hole 63 through an air pipe, the air pressure through hole 63 is positioned at the other side of the rubber sheet 64, and the compressed air enters from the air pressure through hole 63; and a reflux through hole 62 connected with the reflux pipe 8 is arranged at the periphery of the liquid inlet through hole 61, and one side of the rubber sheet 64 can be blocked on the liquid inlet through hole 61. When the exhaust is needed, under the action of the urea pump 3, the gas enters the liquid inlet through hole 61 of the valve body 60, and the gas pushes the rubber sheet 64 to apply a forward acting force (in the right direction in fig. 2), so that the rubber sheet 64 does not block the liquid inlet through hole 61, and the gas enters the backflow through hole 62 and returns to the urea tank 1 through the backflow pipe 8. When the exhaust is completed and urea needs to be injected, the air source 7 applies a forward acting force (such as left direction in fig. 2) to the rubber sheet 64 through the air pressure through hole 63, the rubber sheet 64 blocks the liquid inlet through hole 61, so that urea pumped by the urea pump 3 can only enter the injection pipe 5 and finally be injected through the injection nozzle.
The pressure regulating valve 6 is different from the conventional spring-controlled pressure regulating valve which cannot be dynamically regulated, can be used as a switch valve, can directly switch off a liquid channel through air pressure control, and can also be matched with a pressure sensor 9 to regulate the pressure of a medium in real time.
As shown in fig. 1, the connecting pipe 4 is connected with a pressure sensor 9, the pressure sensor 9 is connected with a control module, and the control module controls the output of the air source 7. The pressure sensor 9 transmits pressure information to the control module, which controls the output of the air source 7, so that the moving position of the rubber sheet 64 can be controlled, thereby adjusting the pressure of the medium.
As shown in fig. 2, the contact area of the rubber sheet 64 with the air pressure is larger than the areas of the return through hole 62 and the liquid feed through hole 61 covered on the rubber sheet 64. Thus, a smaller air pressure is required to block a higher hydraulic pressure in the inlet port 61.
Claims (3)
1. The utility model provides an automobile urea injection system, including urea case (1) and urea pump assembly, urea pump assembly is including urea pump (3) and air-vent valve (6), urea case (1) are connected with urea pump (3) through drain pipe (2), urea pump (3) are connected with air-vent valve (6) through connecting pipe (4), air-vent valve (6) are connected with urea case (1) through back flow (8), be connected with injection pipe (5) on connecting pipe (4), its characterized in that: the pressure regulating valve (6) comprises a valve body (60) and a rubber sheet (64), wherein the edge of the rubber sheet (64) is fixedly connected in the valve body (60), the valve body (60) is provided with a liquid inlet through hole (61) connected with a connecting pipe (4), the liquid inlet through hole (61) is positioned on one side of the rubber sheet (64), the valve body (60) is provided with an air pressure through hole (63) connected with an air source (7), the air pressure through hole (63) is positioned on the other side of the rubber sheet (64), the periphery of the liquid inlet through hole (61) is provided with a backflow through hole (62) connected with a backflow pipe (8), and one side of the rubber sheet (64) can be blocked on the liquid inlet through hole (61).
2. The automotive urea injection system of claim 1, wherein: the contact area of the rubber sheet (64) and the air pressure is larger than the area of the reflux through hole (62) and the liquid inlet through hole (61) covered on the rubber sheet (64).
3. The automotive urea injection system of claim 1, wherein: the connecting pipe (4) is connected with a pressure sensor (9), the pressure sensor (9) is connected with a control module, and the control module controls the output of the air source (7).
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221256908U true CN221256908U (en) | 2024-07-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |