KR20150122990A - Urea Injection Device - Google Patents

Urea Injection Device Download PDF

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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
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KR
South Korea
Prior art keywords
urea water
valve
volume
tank
main body
Prior art date
Application number
KR1020140049237A
Other languages
Korean (ko)
Inventor
육은건
문슬기
Original Assignee
볼보 컨스트럭션 이큅먼트 에이비
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 볼보 컨스트럭션 이큅먼트 에이비 filed Critical 볼보 컨스트럭션 이큅먼트 에이비
Priority to KR1020140049237A priority Critical patent/KR20150122990A/en
Priority to PCT/KR2015/000449 priority patent/WO2015163562A1/en
Publication of KR20150122990A publication Critical patent/KR20150122990A/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
    • 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

[0001] Urea Injection Device [0002]

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 main body 100 has a constant internal space so that the urea water can be injected and accommodated therein. One of the upper surfaces of the tank main body 100 is connected to the inside of the tank main body 100, So that the operator injects urea water into the inner space of the tank body 100 by using the urea water injection pipe 110.

The actuator 700 controls the valve 200 installed on the pipe for injecting urea water into the tank main body 100 under the control of the controller 600 described later.

The actuator 700 is preferably an electric motor having a driving force in accordance with an applied current. However, the actuator 700 need not be limited to such an electric type, and may be pneumatically and hydraulically deformed.

The valve 200 may be installed in the urea water injection pipe 110 of the tank main body 100 and may selectively open and close the channel of the urea water injection pipe 110 according to the operation of the actuator 700 The injection of the urea water through the urea water injection pipe 110 is determined.

Hereinafter, an embodiment of a valve operated by an actuator will be described with reference to FIG.

The valve 200 includes a cylindrical body 210 having a predetermined length and a rotary plate 211 rotatably installed in the cylindrical body 210 to open and close the inner passage of the cylindrical body 210 according to the rotation angle. May be included.

The lower end of the cylindrical body 210 of the valve 200 may be integrally or integrally formed with the distal end of the urea water injection tube 110. In the case of the assembled configuration, The inner circumference of the lower end of the cylindrical body 210 may be fitted into the cylindrical body 210 at a predetermined depth or may be coupled to the inner circumference of the distal end of the urea water injection tube 110 at a predetermined depth. At this time, the lower end of the cylindrical body 210 and the tip end of the urea water injection pipe 110 can be coupled through a fastening member so as to maintain a tight fit or airtightness.

An embodiment of the rotating plate 211 that opens and closes the inner passage of the cylindrical body 210 includes a rotating shaft 211 which is disposed inside the cylindrical body 210 and has a rotation axis 212 And the rotating shaft 212 may be connected to the actuator 700 so as to be rotated at intervals of 90 degrees.

The rotating plate 211 is formed of a circular plate having a diameter corresponding to the inner diameter of the cylindrical body 210. When the rotating plate 211 is rotated parallel to the axial direction of the cylindrical body 210 in accordance with the rotation by the actuator 700 The inner passage of the cylindrical body 210 is opened and when the surface of the rotating plate 211 is in a horizontal state perpendicular to the axial direction of the cylindrical body 210, Is in a closed state.

The rotation angle of the rotary plate 211 driven by the actuator 700 is preferably set to a rotation angle of 90 degrees for the complete opening and closing of the valve 200. However, The valve 200 may be partially opened or closed depending on the rotation angle of the rotation plate 211. [

(Not shown) such as a rubber ring may be further provided on the outer circumference of the rotary plate 211. The airtightness maintaining member may be formed such that the rotary plate 211 is perpendicular to the axial direction of the cylindrical body 210 The inner passage of the valve 200 is positioned between the inner surface of the inner passage of the valve 200 and the outer circumference of the rotary plate 211 to maintain the airtightness of the inner passage, It is possible to precisely block the flow of the urea water flowing along.

The warning device 300 may further be provided in the valve 200 so that the operator can easily recognize the open / closed state of the urea water injection pipe 110 according to the operation of the valve 200, 300 are operated by receiving a signal from a controller 600, which will be described later.

It is preferable that the warning device 300 is installed on one side of the valve 200 installed in the urea water injection pipe 110 so that it can be easily recognized during the injection of the urea water. The position is not limited to the valve 200 and may be installed at various positions including the urea water injection pipe 110 or the tank main body 100 so that the operator can easily recognize the urea water injection process It is possible.

The warning device 300 is operated by receiving a signal from the controller 600 when the volume of the tank main body 100 reaches a predetermined set value, May mean a volume not exceeding the maximum contained volume of the urea water that can be filled into the tank body 100 when the volume of the tank body 100 is expanded due to the expansion of the number of elements filled in the tank body 100. [

In an embodiment of the warning device 300, when the volume of the urea water filled in the tank main body 100 exceeds a predetermined set value, the volume of the urea water filled by generating various types of sound effects, melodies, May be configured to alert the operator through the auditory sense that a predetermined set value has been reached.

In another embodiment, the warning device 300 may be configured such that when the volume of the urea water filled in the tank body 100 exceeds a predetermined set value, the number of urea water filled by irradiating light having various patterns, brightness, It can be configured to warn the operator through this time that the volume has reached a predetermined set value.

The warning device 300 may include a case 310 installed on the outer surface of the valve 200 and a case 310 provided on one side of the case 310 to amplify the sound. And a lamp 312 installed on the other side of the surface of the case 310 for diffusing light to be illuminated.

Accordingly, when the volume of the urea water filled in the tank main body 100 reaches a predetermined set value, the alarm generator 300 is activated in response to the signal of the controller 600, And the warning is recognized through the simultaneous generation of the lights.

The pressure sensor 500 is a measuring means for measuring a pressure change according to the weight of the urea water filled in the tank main body 100. The pressure sensor 500 measures a pressure change in the tank main body 100, A plate 400 is formed on the bottom surface of the tank body 100 and a pressure sensor 500 is connected to the plate 400. Therefore, the pressure sensor 500 determines the displacement of the plate 400 according to the weight of the urea filled in the tank main body 100, and the weight of the urea water is measured. The measured value is measured by the controller 600 ).

Since the displacement of the pressure sensor 500 installed on the plate 400 may vary depending on the shape and installation angle of the plate 400, more than one pressure sensor 500 may be installed for accurate measurement of the displacement, The controller 600 calculates the average of the measured values of the plurality of pressure sensors 500 and measures the weight.

The temperature sensor 800 is a measuring means for measuring the temperature of the urea water stored in the tank main body 100. The temperature sensor 800 is provided on either side of the tank main body 100, The temperature is measured, and the measured value is transmitted to a controller described later.

A plurality of temperature sensors 800 may be installed at different positions of the tank main body 100 for the accurate temperature measurement of the number of urea components and when the plurality of temperature sensors 800 are installed, And the temperature is measured by calculating an average of the values measured by the sensor 800

The controller 600 receives and compares the measured values of the pressure sensor 500 and the temperature sensor 800 to measure the volume of the urea water filled in the tank body 100, The volume of the urea water filled in the tank main body 100 may be determined more accurately by various methods.

The information on the internal standard of the tank main body 100 may include a total volume, a cross-sectional area, a height, etc. of the inside of the tank main body 100, and may include the above-described pressure sensor 500 and the temperature sensor 800, Since sensors and tilt sensors are added, it is possible to increase the accuracy of urea volume calculation through measurement values of various sensors.

The calculation of the volume of the urea water by the controller 600 does not need to be determined by any one method. For example, if the weight W of the urea water is measured by the pressure sensor 500, (g), and the mass (m) can be obtained. Then, by dividing the obtained mass (m) by the density (ρ) of the number of urea, the volume (V) of the number of urea can be obtained. (V = m / rho)

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 temperature sensor 800 needs to be provided. Except when psi is exceeded, the effect of pressure is ignored, so it can be applied as a standard atmospheric pressure of 1 atm.

Another example of calculating the volume of the number of ellipses may be calculated by multiplying the cross-sectional area of the tank body 100 by the height of the number of urea elements. At this time, the cross-sectional area of the tank body 100 along the height It is possible to calculate the volume of the urea water to be filled using the integral when the sectional area of the tank body 100 is different according to the height of the tank main body 100. [

Here, when the sectional area of the tank main body 100 is calculated by multiplying by the height, the height of the urea water greatly affects the calculation of the volume. Therefore, when the apparatus is operated, the number of the elements filled in the tank main body 100 is shaken and the height measured by the water level sensor becomes inaccurate. As a result, even when the volume of the substantial urea water does not reach a predetermined set value, It is possible to generate the alarm generating apparatus 300 while closing the valve 200 by judging that the valve 600 has reached the predetermined set value, thereby preventing precise injection of the urea water.

Accordingly, when the method of calculating the volume of the number of elements using the cross-sectional area and the height is applied, the controller 600 determines whether the equipment is in operation, closes the valve 200 so that no urea water is injected during operation of the equipment, It is preferable that the valve 200 is opened again when the apparatus is switched to the stopped state.

In addition, during operation of the apparatus, due to the malfunction of the sensor due to shaking of the tank main body 100, the accuracy of the volume calculation may be lowered and the alarm generating apparatus 300 may be operated. It is preferable that the controller 600 does not operate the warning device 300 when the controller 600 determines that the device is in operation because the operation may interfere with the injection of the urea water.

The operation of the controller will be described with reference to FIG.

When the urea water is injected into the tank main body 100, the measured value of the pressure sensor 500 and the measured value of the temperature sensor 800 are transmitted to the controller 600 in real time, Information is provided.

The controller 600 receives information on the measured value of the pressure sensor 500, the measured value of the temperature sensor 800, and the internal standard of the tank body 100, calculates the volume to be filled in the tank body 100 The actuator 700 is operated to rotate the rotary plate 211 of the valve 200 when the volume of the number of elements to be filled up reaches a predetermined set value, When the valve 200 is closed according to the rotation of the urea water injection pipe 110, no more urea water injection is performed.

In addition, when the volume of the number of elements to be filled reaches a predetermined set value, the controller 600 operates the alarm generator 300 to inform the operator of the injection stop time of the urea water through sound and illumination.

The injection of the urea water is continued while the inner passage of the valve 200 is closed by the rotary plate of the valve 200 so that the inner passage of the valve 200 is closed by the rotary plate 211, A certain amount of urea water remains in the urea water injection pipe 110 including the upper internal passageway.

Therefore, the controller 600 controls the valve 200 to be opened and closed after a predetermined time elapses after the volume of the urea water filled in the tank main body 100 reaches a predetermined set value, 110 to flow into the inside of the tank main body 100.

The controller 600 controls the valve 200 so that the volume of the urea water filled in the tank main body 100 reaches a predetermined set value, It is possible to remove the number of elements not removed by opening and closing the valve 200.

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 water injection pipe 110 provided in the tank main body 100 of the urea water tank, (S2) the measured value of the number of urea to be filled in the tank main body 100 by comparing and judging the measured values of the pressure sensor 500 and the temperature sensor 800 installed in the tank main body 100, (S3). If the volume of the number of elements to be filled in the number of elements does not reach the predetermined set value, the injection of the number of elements continues.

Thereafter, when the controller 600 determines that the volume of the urea water reaches the predetermined set value by continuously injecting urea water into the tank main body 100, the actuator 700 is operated to close the valve 200 (S4), the injection of the urea water can be stopped.

When the volume of the ellipsis reaches a predetermined set value, the controller 600 activates the alarm generator 300 (S5) so that the volume of the urea water filled by the operator It is possible to recognize that the valve 200 has been closed by reaching the set value.

After the valve 200 has been closed, the controller again activates the actuator 700 to temporarily rotate the rotary plate 211 of the valve 200 after a certain period of time elapses (S6) The urea water remaining in the urea water injection pipe 110 flows into the tank main body 100 in the process of closing the valve 200 through the valve S7.

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 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 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.
2. The urea water injection apparatus according to claim 1, further comprising a temperature sensor for detecting a urea water temperature inside the tank body.
The method of claim 2, further comprising: calculating a volume of the number of elements filled in the tank body by a predetermined calculation formula using input values of the pressure sensor and the temperature sensor, and sending a signal to the actuator when the calculated volume is equal to or larger than a predetermined set value Further comprising a controller to cause the valve to be closed.
The apparatus according to claim 1, further comprising a rotating plate inside the valve, wherein the rotating plate is driven by an actuator.
The urea water injecting apparatus according to claim 1, wherein the actuator is an electric motor that generates a driving force in accordance with an applied electric current.
The apparatus of claim 1, wherein the valve further comprises an alarm generating device activated by receiving a signal from the controller, wherein the alarm generating device generates an alarm when the volume of the urea water filled in the tank main body is equal to or greater than a predetermined set value Wherein the ellipticity of the ellipsoidal element is smaller than the ellipsoid of the ellipsoid.
The urea water injecting apparatus according to claim 6, wherein the warning generating apparatus includes a speaker for generating a sound outside.
The urea water injecting apparatus according to claim 6, wherein the alarm generating apparatus includes one or more lamps for generating an external illumination.
4. The apparatus according to claim 3, wherein the valve closed after the volume of the urea water filled in the tank main body reaches a predetermined set value is temporarily opened and closed after a predetermined time elapses, So that the flow of the urea water can be made smooth.
4. The urea water injection apparatus according to claim 3, wherein when the volume of the urea water filled in the tank body reaches a predetermined set value, the controller outputs a control signal for continuously opening and closing the valve after a predetermined time elapses .






KR1020140049237A 2014-04-24 2014-04-24 Urea Injection Device KR20150122990A (en)

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

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KR20220115836A (en) 2021-02-12 2022-08-19 정율필 Urea water injection tube for automobile to prevent overflow

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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

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