CN203257521U - Injection system for directly injecting urea by pump nozzle - Google Patents
Injection system for directly injecting urea by pump nozzle Download PDFInfo
- Publication number
- CN203257521U CN203257521U CN2013202793600U CN201320279360U CN203257521U CN 203257521 U CN203257521 U CN 203257521U CN 2013202793600 U CN2013202793600 U CN 2013202793600U CN 201320279360 U CN201320279360 U CN 201320279360U CN 203257521 U CN203257521 U CN 203257521U
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- Prior art keywords
- urea
- nozzle
- box
- spray
- pump
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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
- Y02T10/12—Improving ICE efficiencies
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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses an injection system for directly injecting urea by a pump nozzle, and belongs to the technical field of the design of urea injection systems for vehicles. The injection system comprises a urea box (1) and a urea box temperature and liquid level sensor (2) as well as a heating control valve (6) and a heating water pipe (8) which are used for heat exchange of the urea box, wherein the bottom of the urea box is provided with a urea metering valve (5) connected with a urea injection nozzle (4) through a urea pipe (7); the upper part of the urea injection nozzle (4) is directly provided with a urea pump (3). The system cancels injection nozzle cooling, is relatively simple, reduces the configuration difficulty of the whole vehicle, lowers the system cost, breaks the monopoly situation of national suppliers, develops the technical and market competitiveness of independent products fully, and improves the product competitiveness.
Description
Technical field:
The utility model belongs to the technical field of automobile-used urea-spray system, particularly a kind of with urea metering valve and nozzle separately, spray the straight spray urea-spray system that press pump is directly installed on urea nozzle top that builds.
Background technique:
The limit value of exhaust contaminant is compared with the national Ⅲ emission rules in the Abgasgesetz of state's IV, state's V, and the limit value of exhausted pollutant of diesel engine (mainly being particle and oxynitrides) reduces a lot.In the motor machine, be difficult to realize simultaneously reducing above-mentioned two kinds of exhaust contaminants, make engine emission reach the requirement of state's IV, state's V Abgasgesetz, therefore the SCR system becomes one of strategy of the Abgasgesetz that satisfies state's IV, state's V, the content that it can effectively reduce oxynitrides in the exhaust contaminant makes the exhaust contaminant of motor satisfy the emission regulation demands of state's IV, state's V.
Existing urea solution ejecting system all is that urea nozzle and urea metering valve integrate, urea-spray control is with respect to the not delay on the life period between engine exhaust, the transformation efficiency of exhaust nitrogen oxide is high, but solenoid valve is directly installed on upper end of nozzle, near gas exhaust piping, because the gas exhaust piping temperature is high, the heatproof of solenoid valve is far below the gas exhaust piping ambient temperature, therefore urea nozzle needs cooling, and the type of cooling has the modes such as water-cooled and urea cooling at present.
Directly spray urea-spray system refers to the urea-spray system without air-assisted injection, a kind of material of aqueous solution of urea is only arranged in the material of whole ejecting system transmission, ripe straight spray urea solution ejecting system all is that offshore company produces at present, the employing diaphragm pump that has is built pressure, the employing gear pump that has is built pressure, and the pressure power source is all away from nozzle.
Summary of the invention:
The purpose of this utility model is to reduce straight spray urea nozzle to the requirement of cooling itself, a kind of straight spray urea direct-injection system that traditional urea metering valve and nozzle integrate of cancelling is provided, employing with urea metering valve and nozzle is separately sprayed the straight spray urea-spray system that press pump is directly installed on urea nozzle top that builds.
By reference to the accompanying drawings, be described as follows:
The outspoken spray urea-spray of pump system, comprise urea box 1, urea box temperature and liquid level sensor 2 and the heat control valve 6 and the heating pipe 8 that are used for urea heat exchange in the urea box, bottom at urea box directly connects urea metering valve 5, urea metering valve 5 is connected connections by urea tube 7 with urea nozzle, at the top of urea nozzle 4 installation urea pump 3.
Beneficial effect: the utility model be urea pump be directly installed on urea nozzle top without the auxiliary straight spray urea-spray system of air, system finishes the pressure process of building before spraying, on the urea nozzle without the urea metering valve, nozzle does not need cooling unit, system is relatively simple, reduces the arrangement difficulty, reduces system cost, break international suppliers monopolization situation, give full play to technology and the market competitiveness from major product.Improve product competitive ability.
Description of drawings:
Fig. 1 is system schematic of the present utility model.
Among the figure: urea box 1, urea box temperature and liquid level sensor 2, urea pump 3, urea nozzle 4, urea metering valve 5, heat control valve 6, urea tube 7, heating pipe 8
Embodiment:
Below in conjunction with accompanying drawing the utility model is further described:
The purpose of urea-spray system is the nitrogen oxide that reduces in the exhaust, chemical principle be aqueous solution of urea by heating hydrolysis, discharge ammonia, nitrogen oxide reflection in ammonia and the exhaust generates the nitrogen G﹠W, finally makes engine exhaust satisfy the requirement of Abgasgesetz; Because urea nozzle is placed in the gas exhaust piping, if the urea metering valve directly is placed on the urea nozzle, ECU is according to engine exhaust amount control urea injecting quantity, like this under the circulation of motor dynamic operation condition, can so that urea-spray control with respect to the delay on almost not free between engine exhaust, can be so that the transformation efficiency of the oxynitrides of exhaust reaches very high, but solenoid valve is directly installed on upper end of nozzle, near gas exhaust piping, because the gas exhaust piping temperature is high, the heatproof of solenoid valve is far below the gas exhaust piping ambient temperature, so urea nozzle needs cooling, and the type of cooling has the modes such as water-cooled and urea cooling at present; Metering valve of the present utility model separates with nozzle, and solenoid valve is away from gas exhaust piping, and its ambient temperature of living in satisfies usage requirement, does not therefore need cooling.
The outspoken spray urea-spray of pump system as shown in Figure 1, comprise urea box 1, urea box temperature and liquid level sensor 2 and the heat control valve 6 and the heating pipe 8 that are used for the urea heat exchange, in the bottom of urea box urea metering valve 5 is housed, urea metering valve 5 is connected connection by urea tube 7 with urea nozzle, on the top of urea nozzle 4 urea pump 3 is installed directly.
Urea tube 7 be can anti-aqueous solution of urea flexible pipe get final product.
Technical solutions of the utility model are achieved in that
Present automobile-used aqueous solution of urea has-11.5 ℃ of crystallizations and becomes solid-state physical property, because the minimum Environmental Conditions temperature of car is-40 ℃, therefore, the urea-spray system wants to work between-40 ℃ and-11.5 ℃ of ambient temperatures, the urea-spray system must possess heating function, solid-state aqueous solution of urea heating and melting can be become liquid.
1, ECU is according to urea liquid temperature information in the ambient temperature of input and the urea box, and control the opening and closing of heat control valve 6 realizes thawing and add heat control urea liquid in the urea box.
2, ECU is according to the transformation efficiency demand of present engine operating mode and nitrogen oxide, determine urea target emitted dose, then ECU control urea metering valve 5 is opened, urea liquid flows through urea metering valve 5, when the urea liquid of the urea metering valve 5 of flowing through reaches the target emitted dose of ECU, ECU control urea metering valve 5 cuts out, and ECU reaches the purpose of accurate control urea injecting quantity by the duration that opens of control urea metering valve 5.
3, after the urea liquid by metering valve arrives urea nozzle 4 through urea tube 7, through urea pump 3 pressurizations, be ejected in the gas exhaust piping, finish metering, the course of injection of whole urea-spray system.
Because metering valve is away from nozzle, urea-spray control is with respect to the time lag that exists urea tube 7 corresponding urea to transmit between engine exhaust, under the circulation of motor dynamic operation condition, after tested, the transformation efficiency of exhaust nitrogen oxide can satisfy state's IV, V emission regulation demands about 75%.
Claims (1)
1. the outspoken spray urea-spray of pump system, comprise urea box (1), urea box temperature and liquid level sensor (2) and the heat control valve (6) and the heating pipe (8) that are used for urea heat exchange in the urea box, it is characterized in that: directly connect urea metering valve (5) in the bottom of urea box (1), urea metering valve (5) is connected 4 by urea tube (7) with urea nozzle) the pipeline connection, on the top of urea nozzle (4) urea pump (3) is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202793600U CN203257521U (en) | 2013-05-21 | 2013-05-21 | Injection system for directly injecting urea by pump nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202793600U CN203257521U (en) | 2013-05-21 | 2013-05-21 | Injection system for directly injecting urea by pump nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203257521U true CN203257521U (en) | 2013-10-30 |
Family
ID=49470093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202793600U Expired - Lifetime CN203257521U (en) | 2013-05-21 | 2013-05-21 | Injection system for directly injecting urea by pump nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203257521U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256104A (en) * | 2013-05-21 | 2013-08-21 | 中国第一汽车股份有限公司 | Pump nozzle urea direct injecting system |
| CN107461242A (en) * | 2016-06-06 | 2017-12-12 | 天纳克（苏州）排放系统有限公司 | Integrating device, exhaust gas aftertreatment system and control method |
-
2013
- 2013-05-21 CN CN2013202793600U patent/CN203257521U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256104A (en) * | 2013-05-21 | 2013-08-21 | 中国第一汽车股份有限公司 | Pump nozzle urea direct injecting system |
| CN107461242A (en) * | 2016-06-06 | 2017-12-12 | 天纳克（苏州）排放系统有限公司 | Integrating device, exhaust gas aftertreatment system and control method |
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Legal Events
| 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: 20131030 |