KR20150122990A - Urea Injection Device - Google Patents
Urea Injection Device Download PDFInfo
- Publication number
- KR20150122990A KR20150122990A KR1020140049237A KR20140049237A KR20150122990A KR 20150122990 A KR20150122990 A KR 20150122990A KR 1020140049237 A KR1020140049237 A KR 1020140049237A KR 20140049237 A KR20140049237 A KR 20140049237A KR 20150122990 A KR20150122990 A KR 20150122990A
- Authority
- KR
- South Korea
- Prior art keywords
- urea water
- valve
- volume
- tank
- main body
- Prior art date
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Classifications
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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
-
- 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
-
- 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
- F01N3/36—Arrangements for supply of additional fuel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The present invention relates to a urea water injecting apparatus comprising a tank main body having a urea water injection tube and storing urea water therein, a valve installed in the urea water injection pipe, an actuator selectively opening and closing the valve, A pressure sensor for detecting a pressure to be applied to the plate; a temperature sensor for detecting a temperature of the urea water in the tank main body; And a controller for calculating the volume of the number of elements filled in the tank body by using the input values of the sensor and sending a signal to the actuator when the calculated volume is equal to or greater than a predetermined set value to close the valve.
According to this, the overflow of the urea water to be injected into the urea water tank is prevented, whereby the problem that the overflowed urea water is wasted while flowing back to the outside of the urea water tank and contaminates peripheral components can be solved, The urea water tank is damaged due to the expansion due to freezing of the urea water.
Description
The present invention relates to a urea water injection device for preventing urea water used for decomposing nitrogen oxides contained in exhaust gas from a diesel engine from being injected into a urea water tank.
Diesel engines used in construction machinery generate exhaust gas during operation. In particular, when the diesel engine is incompletely combusted, less carbon monoxide or hydrocarbons are emitted, while nitrogen oxides (NOx) are emitted in a relatively large amount.
Examples of devices for purifying nitrogen oxides include a diesel particulate filter (DPF), a selective catalytic reduction (SCR), a selective non-catalytic reduction (SNCR), a lean NOx trap (LNT), and a lean NOx catalyst .
Here, SCR and SNCR generate ammonia by causing a pyrolysis reaction and a hydrolysis reaction to occur by injecting a reactant such as urea (Urea) into the exhaust system, and the ammonia thus generated reacts with nitrogen oxides, It changes into harmless nitrogen (N2) and water.
On the other hand, prior art relating to urea water tanks has been disclosed in Korean Patent Laid-Open No. 10-2012-0059000. In this urea water tank, an appropriate amount of urea water should be stored. If urea water tank has insufficient urea water, The urea water tank is directly supplemented with urea water.
However, when adding urea water to the urea water tank, it is difficult to accurately grasp the degree of replenishment of the urea water through the opaque urea water tank. When urea water is injected in the urea water injection process, As the number of urea flows backward, it is wasted and the surrounding parts are contaminated.
In addition, as the volume of the urea is frozen according to the outside temperature of winter, the volume of the urea water tank should be filled with a certain amount of free space in consideration of such expansion. However, There is a problem that the urea water tank is damaged by the expansion due to the expansion of the urea water.
SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an elliptic The present invention also provides an apparatus for injecting urea water.
According to a preferred embodiment of the described contents, the tank main body is provided with a urea water injection pipe so that urea water can be injected and stored.
The valve is installed in the urea water injection tube of the tank body.
The actuator receives a predetermined signal and opens and closes a valve provided in the urea water injection tube.
The plate is installed on the bottom surface of the tank body and is pressed by the number of urea housed in the tank body.
One or more pressure sensors are installed at the bottom of the plate to detect the pressure being applied to the plate.
According to another preferred embodiment of the described subject matter, the temperature sensor is installed inside the tank body to detect the temperature of the urea water.
In another preferred embodiment of the described subject matter, the controller computes the volume of the number of elements to be filled in the tank body through a calculation equation using the values detected through the pressure sensor and the temperature sensor, The signal is sent to the actuator to close the valve to shut off the urea water injection tube.
According to another preferred embodiment of the disclosed subject matter, a rotary plate may be provided inside the valve, and the rotary plate is rotated by the driving force of the actuator.
According to another preferred embodiment of the disclosed subject matter, the actuator may include an electric motor that generates a driving force in accordance with the applied current.
According to another preferred embodiment of the present invention, the valve may further include a warning generating device that operates by receiving a signal from the controller. The warning generating device may be configured such that the volume of the urea water filled in the tank main body is equal to or greater than a predetermined set value Alarms will be generated.
According to another preferred embodiment of the described contents, the alarm generating device may include a speaker so as to generate sound to the outside.
According to another preferred embodiment of the described subject matter, the warning device may comprise one or more lamps which generate an outward illumination.
According to another preferred embodiment of the disclosed subject matter, the valve is configured to be temporarily opened and closed after a certain period of time when the volume of the urea water filled in the tank body reaches a predetermined set value and is closed, So that the remaining number of urea can flow into the tank body.
According to another preferred embodiment of the present invention, the controller configures the valve to be continuously opened and closed after a predetermined time elapses so that the volume of the urea water filled in the tank body reaches a predetermined set value, So that the urea water remaining in the tank body can flow into the tank body.
The urea water injecting apparatus according to the described contents has the following effects.
The number of urea water in the urea water tank The volume of the urea water filled in the urea water tank during the injection of the urea water through the injection pipe is set to a predetermined value which can be appropriately filled in the urea water tank When the set value is reached, the controller determines this and cuts off the urea water injection tube. Thus, it is possible to prevent wasted urea water and contamination of peripheral parts due to the number of urea and the reverse flow due to injection, The problem that the urea water tank is damaged due to expansion due to freezing can be effectively solved.
In addition, since the effect of the described contents is obviously exerted by the composition of the contents regardless of whether the inventor perceives it or not, the above-mentioned effect is only some effects according to the contents described, It should not be accepted.
It should also be understood that the effect of the described disclosure should be further understood by reference to the overall description of the specification and that, although not explicitly described, a person having ordinary skill in the art will appreciate It should be seen as an effect described in this specification.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a principal portion of an urea water tank according to an embodiment of the present invention.
2 is a principal perspective view illustrating a valve according to an embodiment of the present invention.
Fig. 3 is a perspective view of a recessed portion showing an installation relationship of a plate and a pressure sensor according to an embodiment of the present invention.
4 is a block diagram of a urea water injection apparatus according to an embodiment of the present invention.
5 is a flowchart of a urea water injection apparatus according to an embodiment of the present invention.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims.
In addition, the sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, and the terms defined specifically in consideration of the structure and operation of the contents described may vary depending on the intention or custom of the user or the operator And the definitions of these terms should be based on the contents throughout this specification.
In order to achieve the above object, the present invention provides a urea water injection device comprising a tank main body having a urea water injection pipe, an actuator for opening and closing a valve provided in the urea water injection pipe, A temperature sensor for measuring the temperature of the water; a controller for calculating the current volume through the weight and temperature of the urea water and closing the valve when the calculated volume is greater than a predetermined set value; The following will be described in detail with reference to FIG.
The tank
The
The
The
Hereinafter, an embodiment of a valve operated by an actuator will be described with reference to FIG.
The
The lower end of the
An embodiment of the
The
The rotation angle of the
(Not shown) such as a rubber ring may be further provided on the outer circumference of the
The
It is preferable that the
The
In an embodiment of the
In another embodiment, the
The
Accordingly, when the volume of the urea water filled in the tank
The
Since the displacement of the
The
A plurality of
The
The information on the internal standard of the tank
The calculation of the volume of the urea water by the
Here, the density of the urea water decreases as the temperature increases. Therefore, in order to calculate the accurate volume of the urea water, a measurement value by the
Another example of calculating the volume of the number of ellipses may be calculated by multiplying the cross-sectional area of the
Here, when the sectional area of the tank
Accordingly, when the method of calculating the volume of the number of elements using the cross-sectional area and the height is applied, the
In addition, during operation of the apparatus, due to the malfunction of the sensor due to shaking of the tank
The operation of the controller will be described with reference to FIG.
When the urea water is injected into the tank
The
In addition, when the volume of the number of elements to be filled reaches a predetermined set value, the
The injection of the urea water is continued while the inner passage of the
Therefore, the
The
The process of preventing over-injection of urea water through the urea water injecting apparatus according to an embodiment of the present invention will now be described with reference to FIG.
When the operator recognizing the lack of the number of urea water in the urea water tank replenishes urea water through the urea
Thereafter, when the
When the volume of the ellipsis reaches a predetermined set value, the
After the
Although the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the scope of the disclosed contents should not be limited to the described embodiments, but should be determined by the appended claims and equivalents thereof.
100: tank body 110: urea water injection tube
200: valve 210: cylindrical body
211: rotating plate 212: rotating shaft
300: warning device 310: case
311: Speaker 312: Lamp
400: Plate 500: Pressure sensor
600: Controller 700: Actuator
800: Temperature sensor
Claims (10)
A valve installed in the urea water injection pipe;
An actuator for selectively opening and closing the valve by receiving a predetermined signal;
A plate installed on a bottom surface of the tank body and pressed by the number of urea injected into the tank body; And
A pressure sensor installed at a lower portion of the plate and detecting pressure applied to the plate;
Wherein the ellipticity of the ellipsoidal element is greater than the ellipticity of the element.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020140049237A KR20150122990A (en) | 2014-04-24 | 2014-04-24 | Urea Injection Device |
PCT/KR2015/000449 WO2015163562A1 (en) | 2014-04-24 | 2015-01-15 | Device for injecting urea water |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020140049237A KR20150122990A (en) | 2014-04-24 | 2014-04-24 | Urea Injection Device |
Publications (1)
Publication Number | Publication Date |
---|---|
KR20150122990A true KR20150122990A (en) | 2015-11-03 |
Family
ID=54332698
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020140049237A KR20150122990A (en) | 2014-04-24 | 2014-04-24 | Urea Injection Device |
Country Status (2)
Country | Link |
---|---|
KR (1) | KR20150122990A (en) |
WO (1) | WO2015163562A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20220115836A (en) | 2021-02-12 | 2022-08-19 | 정율필 | Urea water injection tube for automobile to prevent overflow |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR19980025506U (en) * | 1996-11-04 | 1998-08-05 | 박병재 | Oil level meter using pressure sensor and temperature sensor |
KR100216785B1 (en) * | 1996-12-07 | 1999-09-01 | 정몽규 | Fueln tank system |
KR20060053051A (en) * | 2004-11-13 | 2006-05-19 | 월드조인트(주) | Functional valve having an alarm device for shutting |
US8459013B2 (en) * | 2008-12-30 | 2013-06-11 | Daimler Trucks North America Llc | Urea tank with closure member for vehicle exhaust system |
KR101030149B1 (en) * | 2009-07-15 | 2011-04-21 | 최용성 | a float switching apparatus |
FR2967723B1 (en) * | 2010-11-24 | 2015-11-13 | Inergy Automotive Systems Res | STORAGE TANK FOR EXHAUST GAS ADDITIVE OF AN ENGINE |
-
2014
- 2014-04-24 KR KR1020140049237A patent/KR20150122990A/en not_active Application Discontinuation
-
2015
- 2015-01-15 WO PCT/KR2015/000449 patent/WO2015163562A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2015163562A1 (en) | 2015-10-29 |
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