CN113738482B - Urea supply mechanism, urea supply system and vehicle - Google Patents

Urea supply mechanism, urea supply system and vehicle Download PDF

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Publication number
CN113738482B
CN113738482B CN202111147976.8A CN202111147976A CN113738482B CN 113738482 B CN113738482 B CN 113738482B CN 202111147976 A CN202111147976 A CN 202111147976A CN 113738482 B CN113738482 B CN 113738482B
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China
Prior art keywords
urea
pipeline
air inlet
valve
tank
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CN202111147976.8A
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Chinese (zh)
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CN113738482A (en
Inventor
于松乔
朱宏志
贾昭远
韦安阳
张洺源
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FAW Jiefang Automotive Co Ltd
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FAW Jiefang Automotive Co Ltd
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Publication of CN113738482A publication Critical patent/CN113738482A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2093—Periodically blowing a gas through the converter, e.g. in a direction opposite to exhaust gas flow or by reversing exhaust gas flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1426—Filtration means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/148—Arrangement of sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1486—Means to prevent the substance from freezing
    • 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 present application relates to a urea supply mechanism, a urea supply system, and a vehicle. The urea supply mechanism includes: a urea tank for storing a urea solution; one end of the urea outlet pipeline is communicated with the urea tank, and the other end of the urea outlet pipeline is used for spraying urea solution; a gas source for storing a gas; the opposite two ends of the air inlet pipeline are respectively communicated with an air source and the urea tank; the air inlet valve is arranged on the air inlet pipeline and is positioned on one side of the urea tank; the opposite two ends of the back flushing pipeline are respectively communicated with the gas source and the urea outlet pipeline; the back-blowing valve is arranged on the back-blowing pipeline and is arranged side by side and closely adjacent to the air inlet valve; one of the air inlet valve and the blowback valve is controlled to be opened, so that the gas of the gas source can alternatively enter the air inlet pipeline or the blowback pipeline. According to the urea feeder, the air inlet valve and the back flushing valve are arranged in parallel in an integrated mode, so that the modularization and the integration level of the mechanism are improved. In addition, the air supply can be used for urea solution spraying and urea solution hydrops cleaning operation simultaneously, has further improved the modularization and the integrated level of mechanism.

Description

Urea supply mechanism, urea supply system and vehicle
Technical Field
The application relates to the technical field of vehicle emission treatment, in particular to a urea supply mechanism, a urea supply system and a vehicle.
Background
When the vehicle engine works, nitrogen oxides are discharged, the gases are harmful to air and human bodies, and the human bodies absorb the nitrogen oxide gases for a long time to cause respiratory diseases. In order to solve the problem, a urea supply mechanism is used for supplying urea to the engine during the use process of the engine, and chemical reaction is generated during the combustion process of fuel oil, so that nitrogen oxides are converted into nitrogen and water which are harmless to the atmosphere and human bodies and are discharged.
However, the traditional urea supply mechanism has low modularization integration level and large occupied space, so that other parts arranged on the vehicle are limited and the installation space is insufficient.
Disclosure of Invention
Therefore, the urea supply mechanism, the urea supply system and the vehicle with high modularization integration level and small occupied space are needed to be provided for solving the problems that the traditional urea supply mechanism is not high in modularization integration level and large in occupied space, so that other parts arranged on the vehicle are limited and the installation space is insufficient.
According to one aspect of the present application, there is provided a urea supply mechanism for exhaust treatment of a vehicle, characterized by comprising:
a urea tank for storing a urea solution;
one end of the urea outlet pipeline is communicated with the urea tank, and the other end of the urea outlet pipeline is used for spraying the urea solution;
a gas source for storing a gas;
the opposite two ends of the air inlet pipeline are respectively communicated with the air source and the urea tank;
the air inlet valve is arranged on the air inlet pipeline and is positioned on one side of the urea tank;
the opposite two ends of the back flushing pipeline are respectively communicated with the gas source and the urea outlet pipeline; and
the back flushing valve is arranged on the back flushing pipeline and is arranged in parallel and close to the air inlet valve;
one of the air inlet valve and the blowback valve is controlled to be opened, so that the gas of the gas source can alternatively enter the air inlet pipeline or the blowback pipeline.
In one embodiment, the method further comprises the following steps:
an exhaust line in communication with the urea tank;
and the exhaust valve is arranged on the exhaust pipeline and is abutted against the air inlet valve and the back flushing valve in sequence along a first direction.
In one embodiment, the urea filtering device is arranged on the urea outlet pipeline and used for filtering the urea solution.
In one embodiment, the vehicle further comprises an engine having a coolant line; the urea supply mechanism further includes:
the two opposite ends of the heating pipeline are respectively communicated with the cooling liquid pipeline and the urea tank;
and the heating valve is arranged on the heating pipeline.
In one embodiment, the system further comprises a temperature detection device arranged close to the urea tank and used for detecting the temperature information of the urea solution in the urea tank;
the heating valve can be controlled to open or close in response to the temperature information.
In one embodiment, the air cleaner is arranged on the air inlet pipeline and the blowback pipeline and used for filtering the air.
In one embodiment, the vehicle further comprises a bracket mounted on the vehicle and a work platform coupled to the bracket, the urea tank being coupled to the bracket;
the support, the working platform and the urea tank are matched together to form an installation space, and the urea outlet pipeline, the air inlet valve, the back flushing pipeline and the back flushing valve can be installed in the installation space.
In one embodiment, the system further comprises a liquid level detection device arranged close to the urea tank, and the liquid level detection device is used for detecting the storage amount of the urea solution in the urea tank.
According to another aspect of the present application, a urea supply system is also provided, which comprises the urea supply mechanism.
According to another aspect of this application, still provide a vehicle, include turn to alarm and the urea feed system as above, turn to alarm and locate one side of urea jar.
According to the urea supply mechanism, the air inlet valve and the back flushing valve are arranged in parallel and integrally, so that the modularization and the integration degree of the urea supply mechanism can be improved. Therefore, the urea supply mechanism occupies a small space, and reserves more space for adding other parts on the vehicle or installing other parts. In addition, the air supply can be used for urea solution spraying operation and urea solution accumulated liquid cleaning, so that the cost of the urea supply mechanism is reduced, and the modularization and the integration of the urea supply mechanism are further improved.
Drawings
FIG. 1 is a schematic view of a urea supply mechanism according to an embodiment of the present application;
FIG. 2 is a schematic view of the urea supply mechanism shown in FIG. 1 from another perspective.
100. A urea supply mechanism; 10. a urea tank; 20. an intake valve; 30. a blowback valve; 40. an exhaust valve; 50. a urea filter; 60. a heating valve; 70. an air cleaner; 80. a support; 90. a steering alarm.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediary. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.
The urea supply mechanism, the urea supply system, and the vehicle according to the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic view of a urea supply mechanism according to an embodiment of the present application; fig. 2 is a schematic view of the urea supply mechanism shown in fig. 1 from another perspective. For the purpose of illustration, only the structures described in connection with the present application are illustrated in the drawings.
The urea supply mechanism 100 disclosed in at least one embodiment of the present application includes a urea tank 10, a urea outlet pipeline, a urea nozzle, an air source, an air inlet pipeline, an air inlet valve 20, a blowback pipeline, and a blowback valve 30, and is used for treating tail gas of a vehicle.
Urea jar 10 is used for storing urea solution, and the one end that goes out the urea pipeline communicates with urea jar 10, and the other end is used for spraying urea solution. In actual application, the other end of the urea outlet pipeline is communicated with the urea nozzle, and urea solution stored in the urea tank 10 can enter the urea outlet pipeline and be discharged through the urea nozzle.
The air source is used for storing air, two opposite ends of the air inlet pipeline are respectively communicated with the air source and the urea tank 10, and two opposite ends of the back flushing pipeline are respectively communicated with the air source and the urea outlet pipeline. In practical application, the gas in the gas source can respectively enter the gas inlet pipeline and the back flushing pipeline.
The air inlet valve 20 is arranged on the air inlet pipeline and is positioned at one side of the urea tank 10, and the back flushing valve 30 is arranged on the back flushing pipeline and is arranged side by side and closely adjacent to the air inlet valve 20. It is understood that the modularity and the integration of the urea supply mechanism 100 can be improved by integrating the intake valve 20 and the blowback valve 30 in parallel. In this way, the urea supply mechanism 100 occupies a small space, and reserves more space for adding or installing other components to the vehicle.
In practice, one of the air inlet valve 20 and the blowback valve 30 is controlled to open, so that air can alternatively enter the air inlet pipeline or the blowback pipeline. Specifically, when gas enters the gas inlet pipeline, the gas can pressurize the urea tank 10 and drive the urea solution to flow out to the urea outlet pipeline; when the gas enters the back flushing pipeline, the gas can be pressurized out of the urea pipeline, and the urea solution is driven to flow back to the urea tank 10 or be discharged from the urea nozzle. Therefore, the problem of urea solution effusion frost cracking of the urea outlet pipeline and the problem of blockage caused by urea solution crystallization can be avoided. In addition, the air source can be used for urea solution spraying operation and urea solution accumulated liquid cleaning operation, so that the cost of the urea supply mechanism 100 is reduced, and the modularization and the integration level of the urea supply mechanism 100 are further improved.
In some embodiments, the urea supplying mechanism 100 further includes an exhaust line and an exhaust valve 40, the exhaust line is communicated with the urea tank 10, the exhaust valve 40 is disposed on the exhaust line, and is adjacent to the intake valve 20 and the blowback valve 30 in the first direction. Wherein the first direction may be a direction perpendicular to the central axis of the urea tank 10. By integrating and arranging the exhaust valve 40, the intake valve 20 and the blowback valve 30 in parallel, the integration of the urea supply mechanism 100 is further improved, and the overall volume of the urea supply mechanism 100 is not affected.
Specifically, in some embodiments, the exhaust valve 40 may be a manual valve, and of course, the exhaust valve 40 is not limited to this configuration, and may also be other valves, and the present application is not limited thereto. In practical applications, when adding urea solution into the urea tank 10 or performing other operations, an operator may open the exhaust valve 40 to exhaust the compressed gas in the urea tank 10 first, so as to ensure the safety of the subsequent operations.
It should be appreciated that the urea nozzle responsible for injecting the urea solution is critical throughout the urea delivery mechanism 100 in that should a problem occur, the vehicle will illuminate a malfunction light and limit torque output. Further, the most likely problem with urea nozzles is clogging.
Therefore, in some embodiments, the urea supplying mechanism 100 further includes a urea filter 50, the urea filter 50 is disposed on the urea outlet pipeline, and the urea filter 50 is used for filtering the urea solution. In practical use, the urea filter 50 has a high dirt separation rate, and can effectively protect sensitive urea nozzles, thereby ensuring correct urea solution supply.
It is to be understood that in low temperature environments (< -11 ℃), urea solutions tend to freeze. This requires the urea supply mechanism 100 itself to have a heating function in order not to affect the normal running of the vehicle.
Therefore, in some embodiments, the vehicle further includes an engine having coolant lines, and the urea delivery mechanism 100 further includes a heating line and a heating valve 60. The opposite ends of the heating pipeline are respectively communicated with the cooling liquid pipeline and the urea tank 10, the heating pipeline is used for heating the urea tank 10, and the heating valve 60 is arranged on the heating pipeline.
In actual application, the coolant flowing through the engine and entering the heating pipeline from the coolant pipeline has a certain temperature, and when the urea tank 10 needs to be heated, the heating valve 60 is opened, the coolant enters the urea tank 10, and the temperature of the urea tank 10 is raised, so that the urea solution is effectively prevented from being frozen.
Further, the urea supply mechanism 100 further includes a temperature detection device disposed near the urea tank 10 for detecting temperature information of the urea solution in the urea tank 10, and the heating valve 60 can be controlled to open or close in response to the temperature information.
In practical application, when the temperature detection device detects that the temperature of the urea solution in the urea tank 10 is lower than zero, the heating valve 60 is controlled to be opened, and the cooling liquid starts to heat the urea tank 10; when the temperature detection device detects that the temperature of the urea solution in the urea tank 10 is higher than zero, the heating valve 60 is controlled to be closed, and the cooling liquid stops heating the urea tank 10.
In some embodiments, the urea supply mechanism 100 further comprises an air filter 70, and the air filter 70 is disposed on the air intake line and the blowback line for filtering air. In practical application, after the gas provided by the gas source is filtered by the air filter 70, the cleaned gas enters the urea tank 10 through the air inlet valve 20 and inflates the urea tank 10, and at the same time, the urea solution is pressurized and flows out of the urea tank 10 to the urea nozzle.
In some embodiments, the urea supply mechanism 100 further comprises a bracket mounted on the vehicle and a work platform (not shown) coupled to the bracket 80, to which the urea tank 10 is coupled. The bracket 80, the working platform and the urea tank 10 cooperate together to form an installation space, and the urea outlet pipeline, the air inlet valve 20, the back flushing pipeline and the back flushing valve 30 can be installed in the installation space. In practical application, the urea tank 10, the urea outlet pipeline, the air inlet valve 20, the back flushing pipeline and the back flushing valve 30 are all integrated on the bracket 80, which is more beneficial to improving the integration level of the urea supply mechanism 100. In addition, the working platform can be used for providing a working and treading platform for the whole vehicle.
In some embodiments, the urea supply mechanism 100 further comprises a level detection device disposed proximate to the urea tank 10 for detecting an amount of urea solution stored within the urea tank 10. In actual application, when the liquid level detection device detects that the storage amount of the urea solution in the urea tank 10 is insufficient, an operator is reminded to perform liquid supplementing operation on the urea tank 10 in time so as not to influence normal running of a vehicle.
As the same concept of the present application, there is also provided a urea supply system including the urea supply mechanism 100 described above, which has a high integration level and occupies a small vehicle space.
As the same concept of the present application, there is also provided a vehicle including the urea supply system described above, which is high in space utilization.
The urea supply mechanism 100 described above can improve the modularity and the integration of the urea supply mechanism 100 by integrating the intake valve 20 and the blowback valve 30 in parallel. In addition, the air source can be used for urea solution spraying operation and urea solution accumulated liquid cleaning, so that the cost of the urea supply mechanism 100 is reduced, and the modularization and the integration level of the urea supply mechanism 100 are further improved. In addition, one of the air inlet valve 20 and the blowback valve 30 is controlled to open, so that air can enter the air inlet pipeline or the blowback pipeline alternatively. Specifically, when gas enters the gas inlet pipeline, the gas can pressurize the urea tank 10 and drive the urea solution to flow out to the urea outlet pipeline; when the gas enters the back flushing pipeline, the gas can be pressurized out of the urea pipeline, and the urea solution is driven to flow back to the urea tank 10 or be discharged from the urea nozzle. So, can enough avoid the freezing problem of going out the urea pipeline spalling that leads to of urea solution hydrops and the jam problem that the urea solution crystallization leads to.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (8)

1. A urea supply mechanism for exhaust treatment of a vehicle, the vehicle including an engine having a coolant line, the urea supply mechanism comprising:
a urea tank for storing a urea solution;
one end of the urea outlet pipeline is communicated with the urea tank, and the other end of the urea outlet pipeline is used for spraying the urea solution;
a gas source for storing a gas;
the opposite two ends of the air inlet pipeline are respectively communicated with the air source and the urea tank;
the air inlet valve is arranged on the air inlet pipeline and is positioned on one side of the urea tank;
the opposite two ends of the back flushing pipeline are respectively communicated with the gas source and the urea outlet pipeline; and
the back flushing valve is arranged on the back flushing pipeline and is arranged in parallel and close to the air inlet valve;
one of the air inlet valve and the back flushing valve is controlled to be opened, so that gas of the gas source can alternatively enter the air inlet pipeline or the back flushing pipeline;
the urea supply mechanism further includes:
the opposite two ends of the heating pipeline are respectively communicated with the cooling liquid pipeline and the urea tank;
the heating valve is arranged on the heating pipeline;
the urea supply mechanism further includes:
an exhaust line in communication with the urea tank;
the exhaust valve is arranged on the exhaust pipeline and is abutted against the air inlet valve and the back flushing valve in sequence along a first direction;
the first direction is a direction perpendicular to a central axis of the urea tank.
2. The urea supply mechanism of claim 1, further comprising a urea filter disposed on the urea outlet line, the urea filter configured to filter the urea solution.
3. The urea supply mechanism according to claim 1, further comprising a temperature detection device provided near the urea tank, the temperature detection device being configured to detect temperature information of the urea solution in the urea tank;
the heating valve can be controlled to open or close in response to the temperature information.
4. The urea feeding mechanism according to claim 1, further comprising an air filter disposed on the air inlet line and the blowback line for filtering the air.
5. The urea feed mechanism of claim 1, further comprising a bracket mounted on the vehicle and a work platform coupled to the bracket, the urea tank being coupled to the bracket;
the support, the working platform and the urea tank are matched together to form an installation space, and the urea outlet pipeline, the air inlet valve, the back flushing pipeline and the back flushing valve can be installed in the installation space.
6. The urea feed mechanism of claim 1, further comprising a level detection device disposed proximate to the urea tank, the level detection device configured to detect an amount of the urea solution stored in the urea tank.
7. A urea supply system, characterized by comprising a urea supply mechanism according to any one of claims 1-6.
8. A vehicle comprising a turn signal alarm provided on one side of the urea tank, and the urea supply system of claim 7.
CN202111147976.8A 2021-09-28 2021-09-28 Urea supply mechanism, urea supply system and vehicle Active CN113738482B (en)

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WO2017211120A1 (en) * 2016-06-06 2017-12-14 天纳克（苏州）排放系统有限公司 Integrated device, exhaust-gas aftertreatment system, and control method
CN107687358A (en) * 2016-08-04 2018-02-13 广州市新力汽车技术有限公司 The control method of air-assisted gas drive SCR system
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