CN114233451A - Method and device for determining air vent condition of urea box - Google Patents

Method and device for determining air vent condition of urea box Download PDF

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Publication number
CN114233451A
CN114233451A CN202111595276.5A CN202111595276A CN114233451A CN 114233451 A CN114233451 A CN 114233451A CN 202111595276 A CN202111595276 A CN 202111595276A CN 114233451 A CN114233451 A CN 114233451A
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China
Prior art keywords
urea
determining
pressure
vent
air vent
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Granted
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CN202111595276.5A
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Chinese (zh)
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CN114233451B (en
Inventor
胡方圆
张�浩
伏金龙
孙晓磊
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • 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
    • F01N2610/1466—Means for venting air out of conduits or tanks
    • 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
    • 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
    • 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
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The embodiment of the application discloses a method and a device for determining the condition of an air vent of a urea box, wherein a measurement pressure value of a pressure sensor in the urea box is obtained firstly, and the pressure sensor is used for measuring the pressure in the urea box; and determining the blockage condition of the vent hole of the urea box according to the measured pressure value and a preset pressure threshold value. Like this, consider the air vent of urea case and block up the characteristics that lead to the decline of urea incasement pressure, increase a pressure sensor in the urea case, the inside pressure of this urea case of real-time supervision, thus, realized having the real-time perception of the state such as jam risk or blockking up to the air vent of urea case, for can in time wash or change the waterproof ventilated membrane on the air vent and provide the guidance, avoid because the air vent of urea case blocks up the emergence that leads to urea pump to build pressure failure or urea case to inhale trouble such as shriveling, thereby avoided leading to urea injection system to break down because urea case air vent blocks up.

Description

Method and device for determining air vent condition of urea box
Technical Field
The application relates to the technical field of vehicles, in particular to a method and a device for determining the condition of a vent hole of a urea box.
Background
The urea injection system is an indispensable part in exhaust gas aftertreatment, and uses Selective Catalytic Reduction (SCR) technology to purify a large amount of nitrogen oxides (NOx) contained in exhaust gas, specifically, the urea injection system injects urea solution into an exhaust pipe of a vehicle, and the urea solution and the nitrogen oxides (NOx) in the exhaust gas undergo a chemical reaction to be converted into nitrogen, water and trace carbon dioxide, so as to achieve the purpose of reducing the emission of the nitrogen oxides.
In urea injection systems, the container storing the urea solution is called the urea tank, and the urea tank is usually provided with a vent. When the urea tank is filled with the urea solution, air in the urea tank is discharged through the vent hole, and when the urea injection system consumes the urea solution, external air enters the urea tank through the vent hole. The inside waterproof ventilated membrane that has of air vent for prevent that external dust from getting into the urea case, also be used for preventing that urea solution from overflowing through the air vent when the vehicle operation.
However, when the vehicle works in an environment with more dust, the dust is continuously sucked through the vent hole, and the vent hole of the urea box is blocked after a certain amount of dust is accumulated at the waterproof breathable film. The ventilation hole is blocked, so that the ventilation between the urea box and the outside is not smooth, negative pressure is formed inside the urea box along with the consumption of urea, the load of the urea pump during pressure build is increased, and the service life of the urea pump is shortened. The blockage can be severe enough to cause the urea pump to build pressure and the urea tank to deflate.
Based on this, it is urgent to provide a technical scheme who confirms urea case air vent situation, whether the air vent that can in time perception urea case has the jam risk or has blockked up, avoids because the air vent of urea case blocks up the emergence that leads to urea pump to build pressure failure or urea case to inhale the trouble such as flat.
Disclosure of Invention
The embodiment of the application provides a method and a device for determining the condition of a vent hole of a urea box, which can monitor whether the vent hole of the urea box is blocked or not in real time, and avoid the urea injection system from being broken down due to the blockage of the vent hole of the urea box.
In a first aspect, an embodiment of the present application provides a method for determining a vent condition of a urea tank, including:
acquiring a measurement pressure value of a pressure sensor in a urea tank, wherein the pressure sensor is used for measuring the pressure in the urea tank;
and determining the blockage condition of the vent hole of the urea box according to the measured pressure value and a preset pressure threshold value.
Optionally, the determining a blockage condition of an air vent of the urea tank according to the measured pressure value and a preset pressure threshold value includes:
if the measured pressure value is less than the pressure threshold value, it is determined that a vent of the urea tank is blocked.
Optionally, the method further comprises:
and generating an alarm signal, wherein the alarm signal is used for indicating that the air vent of the urea box is blocked.
Optionally, the determining a blockage condition of an air vent of the urea tank according to the measured pressure value and a preset pressure threshold value includes:
and if the measured pressure value is equal to the atmospheric pressure value, determining that the air vent of the urea box is unblocked.
Optionally, the method further comprises:
and determining the blockage degree of the vent hole of the urea box corresponding to the measured pressure value according to the corresponding relation between the preset pressure range and the blockage degree.
In a second aspect, the present application provides an apparatus for determining a vent condition of a urea tank, including:
the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a measurement pressure value of a pressure sensor in a urea tank, and the pressure sensor is used for measuring the pressure in the urea tank;
the first determining unit is used for determining the blockage condition of the air vent of the urea box according to the measured pressure value and a preset pressure threshold value.
Optionally, the first determining unit is specifically configured to:
if the measured pressure value is less than the pressure threshold value, it is determined that a vent of the urea tank is blocked.
Optionally, the apparatus further comprises:
the generating unit is used for generating an alarm signal, and the alarm signal is used for indicating that the vent hole of the urea box is blocked.
Optionally, the first determining unit is specifically configured to:
and if the measured pressure value is equal to the atmospheric pressure value, determining that the air vent of the urea box is unblocked.
Optionally, the apparatus further comprises:
and the second determining unit is used for determining the blockage degree of the vent hole of the urea box corresponding to the measured pressure value according to the preset corresponding relation between the pressure range and the blockage degree.
It should be noted that, for the specific implementation manner and the achieved effects of the apparatus for determining the condition of the urea tank vent provided by the second aspect, reference may be made to the description of the related embodiment of the method for determining the condition of the urea tank vent shown in the first aspect.
In a third aspect, embodiments of the present application further provide a urea tank, where the urea tank includes a pressure sensor and a vent, where:
the pressure sensor is adapted to detect a measured pressure value inside the urea tank, which measured pressure value is used to determine a clogging condition of the vent of the urea tank according to the method of the first aspect as provided above.
In a fourth aspect, the embodiment of the present application further provides a vehicle, which includes the urea tank and the apparatus for determining the condition of the urea tank vent hole provided in the second aspect.
Therefore, the embodiment of the application has the following beneficial effects:
the embodiment of the application provides a method for determining the condition of a vent hole of a urea box, which comprises the following steps: acquiring a measurement pressure value of a pressure sensor in a urea tank, wherein the pressure sensor is used for measuring the pressure in the urea tank; and determining the blockage condition of the vent hole of the urea box according to the measured pressure value and a preset pressure threshold value. Like this, consider the air vent of urea case and block up the characteristics that lead to the decline of urea incasement pressure, increase a pressure sensor in the urea case, the inside pressure of this urea case of real-time supervision, thus, realized having the real-time perception of the state such as jam risk or blockking up to the air vent of urea case, for can in time wash or change the waterproof ventilated membrane on the air vent and provide the guidance, avoid because the air vent of urea case blocks up the emergence that leads to urea pump to build pressure failure or urea case to inhale trouble such as shriveling, thereby avoided leading to urea injection system to break down because urea case air vent blocks up.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is obvious for those skilled in the art to obtain other drawings according to these drawings.
FIG. 1 is a schematic structural diagram of a urea tank provided in an embodiment of the present application;
FIG. 2 is a schematic flow chart of a method for determining a vent condition of a urea tank according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of an apparatus for determining a condition of a vent of a urea tank according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of a urea tank according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a vehicle according to an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the drawings are described in detail below. It is to be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application. It should be noted that, for the convenience of description, only a part related to the present application is shown in the drawings, and not all structures are shown.
For vehicles running in an environment with more dust, along with consumption of urea solution in the urea box, dust is continuously attached to the waterproof breathable film through the vent hole, and the vent hole of the urea box can be blocked after a certain amount of dust is accumulated. The ventilation hole is blocked to lead to unsmooth ventilation between the urea box and the outside, and along with the consumption of urea solution, the inside negative pressure that forms of urea box can increase the load when the urea pump builds pressure, shortens urea pump life. The blockage can be severe enough to cause the urea pump to build pressure and the urea tank to deflate.
Moreover, because the working environments of different vehicles are different greatly, a cleaning cycle or a replacement cycle of the waterproof breathable film on the vent hole of the urea box cannot be uniformly set so as to solve the problem of blockage of the vent hole of the urea box.
At present, the reporting of the urea injection system fault is generally realized based on the duty ratio of the urea pump, that is, the duty ratio of the urea pump is monitored after the urea pump is pressurized and under the condition that no urea injection amount exists, and if the duty ratio of the urea pump is greater than a certain limit value, the urea injection system fault is determined. However, the duty ratio of the urea pump is larger than the limit value, for example, the urea pump is aged, the diaphragm of the urea pump is damaged, the pipeline leaks air or the vent hole of the urea tank is blocked, and it is seen that the vent hole of the urea tank cannot be locked or not blocked by monitoring the duty ratio of the urea pump.
Based on this, the embodiment of the application provides a method for determining the condition of the air vent of the urea box, whether the air vent of the urea box has a blocking risk or is blocked can be monitored in real time, and the urea injection system is prevented from being broken down due to the blocking of the air vent of the urea box. In specific implementation, the device for determining the state of the air vent of the urea tank can firstly acquire a measurement pressure value of a pressure sensor in the urea tank, wherein the pressure sensor is used for measuring the pressure in the urea tank; and determining the blockage condition of the vent hole of the urea box according to the measured pressure value and a preset pressure threshold value.
Like this, consider the air vent of urea case and block up the characteristics that lead to the decline of urea incasement pressure, increase a pressure sensor in the urea case, the inside pressure of this urea case of real-time supervision, thus, realized having the real-time perception of the state such as jam risk or blockking up to the air vent of urea case, for can in time wash or change the waterproof ventilated membrane on the air vent and provide the guidance, avoid because the air vent of urea case blocks up the emergence that leads to urea pump to build pressure failure or urea case to inhale trouble such as shriveling, thereby avoided leading to urea injection system to break down because urea case air vent blocks up.
The main body for implementing the embodiment of the present application may be a device having a function of determining the state of the urea tank vent, for example, a device 300 for determining the state of the urea tank vent shown in fig. 3 described below.
The method for determining the state of the air vent of the urea tank provided by the embodiment of the application can also be applied to the scenes of vehicle control and the like, and the method can be used as long as the method can interact with the urea tank in the urea injection system.
Before describing the method for determining the condition of the vent of the urea tank provided by the embodiment of the application, the urea tank provided by the embodiment of the application is described. Fig. 1 is a schematic structural diagram of a urea tank provided in an embodiment of the present application, and referring to fig. 1, the urea tank 100 may include: a tank 110, a urea solution filling port 120, a liquid level difference sensor 130, a vent hole 140, and a pressure sensor 150. The pressure sensor 150 is configured to collect a pressure value inside the tank body 110 of the urea tank 100, and transmit the collected pressure value to the apparatus for determining the condition of the urea tank vent in the embodiment of the present application, as a basis for determining the condition of the urea tank vent.
To facilitate understanding of a specific implementation of the method for determining the condition of the vent of the urea tank provided in the embodiments of the present application, the following description is made with reference to the accompanying drawings.
Referring to fig. 2, a schematic flow chart of a method for determining a vent condition of a urea tank according to an embodiment of the present application is shown. As shown in fig. 2, the method may include the following S201 to S202:
s201, obtaining a measurement pressure value of a pressure sensor in the urea box, wherein the pressure sensor is used for measuring the pressure in the urea box.
In the embodiment of the application, the pressure sensor is additionally arranged in the urea box, the pressure sensor can detect the pressure in the urea box in real time and record the pressure as a measured pressure value, the measured pressure value is fed back to the device for determining the state of the air vent of the urea box, and the device for determining the state of the air vent of the urea box judges the blocking condition of the air vent of the urea box based on the method provided by the embodiment of the application.
When the urea injection system works normally, the urea in the urea box is continuously consumed. If the air vent of the urea box is not blocked, the measured pressure value inside the urea box should be the same as the atmospheric pressure, and if the air vent of the urea box is blocked, the measured pressure value inside the urea box should be smaller than the atmospheric pressure, and negative pressure occurs.
The measured pressure value in the urea box is obtained based on S201, and a data basis is provided for determining the blockage condition of the vent hole of the urea box according to the embodiment of the application.
S202, determining the blockage condition of the vent hole of the urea box according to the measured pressure value and a preset pressure threshold value.
The preset pressure threshold may be calibrated based on experience or experiment.
In one aspect, a pressure threshold may be calibrated, and the pressure threshold may then refer to the pressure within the urea tank when the urea tank vent is blocked.
In this case, S201 may include: if the measured pressure value is less than the pressure threshold value, it is determined that a vent of the urea tank is blocked. The blockage of the vent hole here may mean that the vent hole is completely blocked.
In order to avoid the urea pump and the urea case damage in time, this application embodiment can also include: and generating an alarm signal, wherein the alarm signal is used for indicating that the air vent of the urea box is blocked. Therefore, after the vehicle receives the alarm signal, the waterproof breathable film on the vent hole can be cleaned or replaced in time. Therefore, the blockage situation of the air hole of the urea box can be judged before the pressure build failure of the urea pump and the shriveling of the urea box are caused, and the blockage situation is avoided.
In this case, S201 may further include: and if the measured pressure value is equal to the atmospheric pressure value, determining that the air vent of the urea box is unblocked.
In another case, at least two pressure thresholds or at least two pressure ranges can be calibrated to know the blockage degree of the vent hole in real time.
For example, assume that two pressure thresholds are preset: the method includes a first threshold and a second threshold, where the first threshold is greater than the second threshold, and the first threshold is smaller than an atmospheric pressure value, and the method may further include: if the measured pressure value is less than the second threshold value, determining that the vent hole of the urea box is completely blocked; if the measured pressure value is greater than or equal to the second threshold value and smaller than the first threshold value, determining that the ventilation hole of the urea box is blocked by more than 50%, and risking complete blockage; if the measured pressure value is greater than or equal to a second threshold value, determining that the blockage of the air vent of the urea box is lower than 50%, and the risk of complete blockage is low; and if the measured pressure value is equal to the atmospheric pressure value, determining that the air vent of the urea box is unblocked.
For another example, assume that two pressure ranges are preset: the pressure value in the first pressure range is higher, and this application embodiment can also include: if the measured pressure value is in the second pressure range, determining that the ventilation hole of the urea box is seriously blocked; if the measured pressure value is in the first pressure range, determining that a vent hole of the urea box is slightly blocked; and if the measured pressure value is equal to the atmospheric pressure value, determining that the air vent of the urea box is unblocked.
As an example, the embodiment of the present application may also calibrate a corresponding relationship between a preset pressure range and a blockage degree in advance, and then, the embodiment of the present application may further include: and determining the blockage degree of the vent hole of the urea box corresponding to the measured pressure value according to the corresponding relation between the preset pressure range and the blockage degree.
Thus, the condition of the air vent of the urea box can be known more clearly, and the safe use of the urea box and the urea pump is possible.
Therefore, according to the method provided by the embodiment of the application, the pressure sensor is used for measuring the pressure in the urea box by acquiring the measured pressure value of the pressure sensor in the urea box; and determining the blockage condition of the vent hole of the urea box according to the measured pressure value and a preset pressure threshold value. Like this, consider the air vent of urea case and block up the characteristics that lead to the decline of urea incasement pressure, increase a pressure sensor in the urea case, the inside pressure of this urea case of real-time supervision, thus, realized having the real-time perception of the state such as jam risk or blockking up to the air vent of urea case, for can in time wash or change the waterproof ventilated membrane on the air vent and provide the guidance, avoid because the air vent of urea case blocks up the emergence that leads to urea pump to build pressure failure or urea case to inhale trouble such as shriveling, thereby avoided leading to urea injection system to break down because urea case air vent blocks up.
Accordingly, the embodiment of the present application further provides an apparatus 300 for determining the ventilation status of the urea tank, as shown in fig. 3. The apparatus 300 for determining the condition of the urea tank vent may include an obtaining unit 301 and a first determining unit 302. Wherein:
an obtaining unit 301, configured to obtain a measurement pressure value of a pressure sensor in a urea tank, where the pressure sensor is used to measure a pressure in the urea tank;
a first determining unit 302, configured to determine a blockage condition of an air vent of the urea tank according to the measured pressure value and a preset pressure threshold.
Optionally, the first determining unit 302 is specifically configured to:
if the measured pressure value is less than the pressure threshold value, it is determined that a vent of the urea tank is blocked.
Optionally, the apparatus 300 further comprises:
the generating unit is used for generating an alarm signal, and the alarm signal is used for indicating that the vent hole of the urea box is blocked.
Optionally, the first determining unit 302 is specifically configured to:
and if the measured pressure value is equal to the atmospheric pressure value, determining that the air vent of the urea box is unblocked.
Optionally, the apparatus 300 further comprises:
and the second determining unit is used for determining the blockage degree of the vent hole of the urea box corresponding to the measured pressure value according to the preset corresponding relation between the pressure range and the blockage degree.
It should be noted that, the specific implementation manner and the achieved effect of the apparatus 300 for determining the vent condition of the urea tank can be referred to the description of the related embodiment of the method for determining the vent condition of the urea tank shown in fig. 2.
In addition, the embodiment of the present application also provides a urea tank 400, referring to fig. 4, the urea tank 400 includes a pressure sensor 401 and a vent 402, wherein:
the pressure sensor 401 is used to detect a measured pressure value inside the urea tank 400, which is used to determine a blockage condition of the vent 402 of the urea tank 400 according to the method shown in fig. 2 above.
In addition, the embodiment of the application also provides a vehicle 500, as shown in fig. 5, the vehicle 500 comprises a urea box 501 and the device 300 for determining the air vent condition of the urea box.
In the embodiment of the present application, the urea tank 100, the urea tank 400, and the urea tank 501 are all the urea tanks provided in the embodiment of the present application, and the appearance places can be replaced with each other, without affecting the implementation of the embodiment. Similarly, the pressure sensor 401 and the pressure sensor 150 are both the urea box provided by the embodiment of the present application, and the appearance positions can be replaced with each other, without affecting the implementation of the embodiment.
As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that all or part of the steps in the above embodiment methods can be implemented by software plus a general hardware platform. Based on such understanding, the technical solution of the present application may be embodied in the form of a software product, which may be stored in a storage medium, such as a read-only memory (ROM)/RAM, a magnetic disk, an optical disk, or the like, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network communication device such as a router) to execute the method according to the embodiments or some parts of the embodiments of the present application.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, system embodiments and device embodiments are substantially similar to method embodiments and are therefore described in a relatively simple manner, where relevant reference may be made to some descriptions of method embodiments. The above-described embodiments of the apparatus and system are merely illustrative, wherein modules described as separate parts may or may not be physically separate, and parts shown as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The above description is only a preferred embodiment of the present application and is not intended to limit the scope of the present application. It should be noted that, for a person skilled in the art, several improvements and modifications can be made without departing from the scope of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims (12)

1. A method of determining a condition of a vent of a urea tank, comprising:
acquiring a measurement pressure value of a pressure sensor in a urea tank, wherein the pressure sensor is used for measuring the pressure in the urea tank;
and determining the blockage condition of the vent hole of the urea box according to the measured pressure value and a preset pressure threshold value.
2. The method of claim 1, wherein said determining a blockage condition of a vent of said urea tank based on said measured pressure value and a preset pressure threshold comprises:
if the measured pressure value is less than the pressure threshold value, it is determined that a vent of the urea tank is blocked.
3. The method of claim 2, further comprising:
and generating an alarm signal, wherein the alarm signal is used for indicating that the air vent of the urea box is blocked.
4. The method of claim 1, wherein said determining a blockage condition of a vent of said urea tank based on said measured pressure value and a preset pressure threshold comprises:
and if the measured pressure value is equal to the atmospheric pressure value, determining that the air vent of the urea box is unblocked.
5. The method of claim 1, further comprising:
and determining the blockage degree of the vent hole of the urea box corresponding to the measured pressure value according to the corresponding relation between the preset pressure range and the blockage degree.
6. An apparatus for determining a condition of a vent in a urea tank, comprising:
the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a measurement pressure value of a pressure sensor in a urea tank, and the pressure sensor is used for measuring the pressure in the urea tank;
the first determining unit is used for determining the blockage condition of the air vent of the urea box according to the measured pressure value and a preset pressure threshold value.
7. The apparatus according to claim 6, wherein the first determining unit is specifically configured to:
if the measured pressure value is less than the pressure threshold value, it is determined that a vent of the urea tank is blocked.
8. The apparatus of claim 7, further comprising:
the generating unit is used for generating an alarm signal, and the alarm signal is used for indicating that the vent hole of the urea box is blocked.
9. The apparatus according to claim 6, wherein the first determining unit is specifically configured to:
and if the measured pressure value is equal to the atmospheric pressure value, determining that the air vent of the urea box is unblocked.
10. The apparatus of claim 6, further comprising:
and the second determining unit is used for determining the blockage degree of the vent hole of the urea box corresponding to the measured pressure value according to the preset corresponding relation between the pressure range and the blockage degree.
11. A urea tank, characterized in that the urea tank comprises a pressure sensor and a vent, wherein:
-the pressure sensor for detecting a measured pressure value inside the urea tank, which measured pressure value is used for determining a clogging condition of the venting orifice of the urea tank according to the method of any one of the preceding claims 1-5.
12. A vehicle comprising said urea tank and an apparatus for determining the condition of the urea tank vent as claimed in any one of claims 6 to 10.
CN202111595276.5A 2021-12-23 2021-12-23 Method and device for determining air vent condition of urea box Active CN114233451B (en)

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GB201718329D0 (en) * 2017-11-06 2017-12-20 Jaguar Land Rover Ltd Filler head body for a reductant reservoir assembly
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CN110295975A (en) * 2018-03-22 2019-10-01 陕西重型汽车有限公司 The ventilating system of urea box and the urea box
CN209777069U (en) * 2019-04-17 2019-12-13 一汽解放汽车有限公司 Urea tank filling amount control device

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0727025A (en) * 1993-06-30 1995-01-27 Robert Bosch Gmbh Control method of tank ventilator and diagnostic method thereof
US20020184942A1 (en) * 2001-06-12 2002-12-12 Honda Giken Kogyo Kabushiki Kaisha Abnormality detecting device for evaporative fuel processing system
JP2009264207A (en) * 2008-04-24 2009-11-12 Denso Corp Flow diagnosis apparatus for fuel vaporized gas purge system
US20160040577A1 (en) * 2013-01-28 2016-02-11 Isuzu Motors Limited Urea water pipe clogging detection device for urea scr
WO2015032765A1 (en) * 2013-09-04 2015-03-12 Caterpilllar Sarl Fuel filter clogging detection device in fuel supply circuit, and working machine
JP2018048561A (en) * 2016-09-20 2018-03-29 いすゞ自動車株式会社 Clogging detection system for exhaust pressure sensor tube of internal combustion engine, and clogging detection method for exhaust pressure sensor tube of internal combustion engine
CN106640294A (en) * 2017-01-23 2017-05-10 中国第汽车股份有限公司 Dual-pressure-transducer type gas-driven urea injection system and control method
GB201718329D0 (en) * 2017-11-06 2017-12-20 Jaguar Land Rover Ltd Filler head body for a reductant reservoir assembly
CN110295975A (en) * 2018-03-22 2019-10-01 陕西重型汽车有限公司 The ventilating system of urea box and the urea box
CN209777069U (en) * 2019-04-17 2019-12-13 一汽解放汽车有限公司 Urea tank filling amount control device

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