CN108332918A - A kind for the treatment of system for tail gas of automobile self checking method - Google Patents
A kind for the treatment of system for tail gas of automobile self checking method Download PDFInfo
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- CN108332918A CN108332918A CN201711484774.6A CN201711484774A CN108332918A CN 108332918 A CN108332918 A CN 108332918A CN 201711484774 A CN201711484774 A CN 201711484774A CN 108332918 A CN108332918 A CN 108332918A
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- Prior art keywords
- pressure
- ammonia
- gas
- tail gas
- tank
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
Abstract
The invention discloses a kind for the treatment of system for tail gas of automobile self checking methods, including：The replenishment valve for opening output gas tank, closes its delivery valve, and ammonia is filled with into output gas tank by ammonia storage tank；Replenishment valve is closed, the gas pressure in output gas tank is detected by pressure sensor, and record first pressure numerical value；After preset time, detection exports the gas pressure in gas tank again, and records second pressure numerical value；Calculate the air pressure difference of first pressure numerical value and second pressure numerical value, judge whether air pressure difference is less than preset pressure difference, if it is not, then the ammonia deferent segment leakproofness of judgement treatment system for tail gas of automobile is unqualified, if so, the ammonia deferent segment leakproofness of judgement treatment system for tail gas of automobile is qualified.Pressure certain time is kept in tank by that will export, and determines that its pressurize situation judges system air-tightness accordingly by the measurement numerical value of pressure sensor, to prevent the waste of ammonia, pollution and the discharge beyond standards of tail gas.
Description
Technical field
The present invention relates to Vehicular exhaust processing technology fields, certainly more specifically to a kind for the treatment of system for tail gas of automobile
Detecting method.
Background technology
The exhaust gas processing device of automobile mainly makes tail gas be purified under the effect of the catalyst, to mitigate to environment
The device of pollution.Vehicle exhaust is the exhaust gas generated when automobile use, contains hundreds of different compound, pollutant therein
There are solid aerosol, carbon monoxide, carbon dioxide, hydrocarbon, oxynitrides, lead and oxygen sulfur compound etc..
Currently, the exhaust gas purification equipment of mainstream is realized by the way of catalyst, the vehicle exhaust of high temperature passes through purification
When device, the cleanser in catalyst converter will enhance the activity of CO, HC and NOx gas, it is promoted to carry out certain redox
Reaction is learned, to make pernicious gas become innocuous gas, vehicle exhaust is made to be purified.
However there is also certain defects for this existing catalyst cleaning mode, are mainly manifested in nitrogen oxides removal not
Thoroughly, clarifier is difficult to adapt to the different adaptability for working condition work of vehicle, and long-time is easy miscellaneous using rear catalyst converter position
Matter contamination and plugging, causes clean-up effect to decline.
To cope with this problem, inventor it has been investigated that：Using lasting ammonia for giving the hair of the nitrogen oxides in tail gas
Biochemical reaction also efficiently can thoroughly remove the nitrogen oxides in tail gas.
However this technical solution requires the ammonia supply as reactant to have stronger lasting controllability, it is desirable that ammonia
Air accumulator onboard, and be the controllability of guarantee ammonia supply, need the output system of ammonia that there is good leakproofness, and
The design scheme based on ammonia tail gas processing system is not present in the prior art
In conclusion how to efficiently solve the treatment system for tail gas of automobile handled using ammonia, it is difficult to ensure output system
The leakproofness of system is that current those skilled in the art are badly in need of solving to ensure the technical problem of stably and controllable output of ammonia etc.
Problem.
Invention content
In view of this, the purpose of the present invention is to provide a kind for the treatment of system for tail gas of automobile self checking method, the Vehicular exhaust
Processing system self checking method can efficiently solve the treatment system for tail gas of automobile handled using ammonia, it is difficult to ensure output system
Leakproofness, with ensure ammonia it is stably and controllable output etc. technical problem.
In order to achieve the above object, the present invention provides the following technical solutions：
A kind for the treatment of system for tail gas of automobile self checking method, including：
The replenishment valve for opening output gas tank, closes its delivery valve, ammonia is filled with into the output gas tank by ammonia storage tank；
The replenishment valve is closed, the gas pressure in output gas tank is detected by pressure sensor, and record first pressure
Numerical value；
After preset time, the gas pressure in the output gas tank is detected again, and record second pressure numerical value；
The air pressure difference for calculating the first pressure numerical value and second pressure numerical value, judges whether the air pressure difference is less than
Preset pressure difference, if it is not, then the ammonia deferent segment leakproofness of judgement treatment system for tail gas of automobile is unqualified, if so, sentencing
The ammonia deferent segment leakproofness for determining treatment system for tail gas of automobile is qualified.
Preferably, in above-mentioned treatment system for tail gas of automobile self checking method, including：
When judging the ammonia deferent segment leakproofness qualification for the treatment of system for tail gas of automobile, open defeated on the output gas tank
Go out valve, ammonia is exported to vent gas treatment case, and periodically opens the replenishment valve, closes the delivery valve into the output tank
Supplement ammonia.
Preferably, described to close the replenishment valve in above-mentioned treatment system for tail gas of automobile self checking method, pass through pressure sensing
Gas pressure in device detection output gas tank, and first pressure numerical value is recorded, specially：
During being filled with ammonia into the output gas tank, the gas in output gas tank is detected in real time by pressure sensor
Body pressure closes the replenishment valve when reaching preset pressure value, and it is the first pressure number to record the preset pressure value
Value.
Preferably, described to close the replenishment valve in above-mentioned treatment system for tail gas of automobile self checking method, pass through pressure sensing
Gas pressure in device detection output gas tank, and first pressure numerical value is recorded, including：
It is filled with into the output gas tank after ammonia reaches the second preset time, closes the replenishment valve.
Preferably, in above-mentioned treatment system for tail gas of automobile self checking method, further include：
Detect whether engine speed reaches rotating speed preset value by ECU, if it is, opening the supplement of output gas tank
Valve, if it is not, then terminating.
Preferably, in above-mentioned treatment system for tail gas of automobile self checking method, further include：
After judging whether engine speed reaches rotating speed preset value, by tail gas pipeline from vent gas treatment case to the storage
High-temperature tail gas heating ammonia storage tank is passed through in ammonia tank；And after getting the first pressure numerical value, stop logical to the ammonia storage tank
Enter high-temperature tail gas.
Treatment system for tail gas of automobile self checking method provided by the invention, including：
The replenishment valve for opening output gas tank, closes its delivery valve, ammonia is filled with into the output gas tank by ammonia storage tank；
The replenishment valve is closed, the gas pressure in output gas tank is detected by pressure sensor, and record first pressure
Numerical value；
After preset time, the gas pressure in the output gas tank is detected again, and record second pressure numerical value；
The air pressure difference for calculating the first pressure numerical value and second pressure numerical value, judges whether the air pressure difference is less than
Preset pressure difference, if it is not, then the ammonia deferent segment leakproofness of judgement treatment system for tail gas of automobile is unqualified, if so, sentencing
The ammonia deferent segment leakproofness for determining treatment system for tail gas of automobile is qualified.This inspection based on ammonia tail gas processing system in the present invention
Survey method, the air-tightness of ammonia deferent segment, ensures to export ammonia stably and controllable, tool with this in using preceding first detecting system
The supplement end for first opening the output tank for exporting ammonia of body, and closes its output end, by ammonia storage tank to supplying inside it,
When gas supply reaches it is a certain amount of after, output end is also closed, enables and keeps pressure certain time in its tank, and pass through pressure sensor
It measures numerical value and determines its pressurize situation, if the front and back pressure divergence that measures twice is smaller, can determine that ammonia deferent segment leakproofness is closed
Lattice can start the operation of subsequent output ammonia processing tail gas, can prompt user if pressurize situation is unqualified, in time
The situation is handled, to prevent the waste of ammonia, pollution and the discharge beyond standards of tail gas, efficiently solves the vehicle handled using ammonia
Exhaust treatment system, it is difficult to ensure the leakproofness of output system, to ensure the technical problem of stably and controllable output of ammonia etc..
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the flow diagram for the treatment of system for tail gas of automobile self checking method provided in an embodiment of the present invention.
Specific implementation mode
The embodiment of the invention discloses a kind for the treatment of system for tail gas of automobile self checking methods, to solve the vehicle using ammonia processing
Exhaust treatment system, it is difficult to ensure the leakproofness of output system, to ensure the technical problem of stably and controllable output of ammonia etc..
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the flow that Fig. 1 is treatment system for tail gas of automobile self checking method provided in an embodiment of the present invention is illustrated
Figure.
Treatment system for tail gas of automobile self checking method provided in an embodiment of the present invention, including：
S01:The replenishment valve for opening output gas tank, closes its delivery valve, is filled with into the output gas tank by ammonia storage tank
Ammonia；
S02:The replenishment valve is closed, the gas pressure in output gas tank is detected by pressure sensor, and record first
Pressure value；
S03:After preset time, the gas pressure in the output gas tank is detected again, and record second pressure number
Value；
S04:Whether the air pressure difference for calculating the first pressure numerical value and second pressure numerical value judges the air pressure difference
Less than preset pressure difference, if it is not, then the ammonia deferent segment leakproofness of judgement treatment system for tail gas of automobile is unqualified, if
It is to judge that the ammonia deferent segment leakproofness for the treatment of system for tail gas of automobile is qualified.
This detection method based on ammonia tail gas processing system in the present invention, ammonia is defeated in using preceding first detecting system
The air-tightness for going out section, with this ensures to export ammonia stably and controllable, specifically first opens the output tank for exporting ammonia
Supplement end, and close its output end, by ammonia storage tank to supplying inside it, when gas supply reaches it is a certain amount of after, output end is also sealed
It closes, enables and keep pressure certain time in its tank, and its pressurize situation is determined by the measurement numerical value of pressure sensor, such as front and back two
Secondary measurement pressure divergence is smaller, can determine that ammonia deferent segment leakproofness is qualified, can start subsequent output ammonia processing tail
The operation of gas, can prompt user if pressurize situation is unqualified, the timely processing situation, to prevent the wasting of ammonia, dirty
The discharge beyond standards of dye and tail gas, efficiently solve the treatment system for tail gas of automobile handled using ammonia, it is difficult to ensure output system
The leakproofness of system, to ensure the technical problem of stably and controllable output of ammonia etc..
To advanced optimize above-mentioned technical proposal, on the basis of the above embodiments preferably, above-mentioned Vehicular exhaust processing
In System self-test method, including：
When judging the ammonia deferent segment leakproofness qualification for the treatment of system for tail gas of automobile, open defeated on the output gas tank
Go out valve, ammonia is exported to vent gas treatment case, and periodically opens the replenishment valve, closes the delivery valve into the output tank
Supplement ammonia.
In technical solution provided in this embodiment, subsequent system processing tail gas operations are advanced optimized, when judgement is
After leakproofness qualification of uniting, delivery valve is opened, the ammonia in tank will be exported and input vent gas treatment case, reacted with vehicle in it
Remove wherein nitrogen oxides；And after a certain time ammonia storage tank inner capacities deficiency when, be re-closing off delivery valve, it is logical to open replenishment valve
It crosses ammonia storage tank and supplements ammonia into output tank.
To advanced optimize above-mentioned technical proposal, on the basis of the above embodiments preferably, above-mentioned Vehicular exhaust processing
It is described to close the replenishment valve in System self-test method, the gas pressure in output gas tank is detected by pressure sensor, and remember
First pressure numerical value is recorded, specially：
During being filled with ammonia into the output gas tank, the gas in output gas tank is detected in real time by pressure sensor
Body pressure closes the replenishment valve when reaching preset pressure value, and it is the first pressure number to record the preset pressure value
Value.
In technical solution provided in this embodiment, the design of seal detection-phase is advanced optimized, by examining in real time
Survey output tank in pressure, once its pressure reach preset value then close replenishment valve start subsequent pressurize and measure judgement behaviour
Make.
To advanced optimize above-mentioned technical proposal, on the basis of the above embodiments preferably, above-mentioned Vehicular exhaust processing
It is described to close the replenishment valve in System self-test method, the gas pressure in output gas tank is detected by pressure sensor, and remember
First pressure numerical value is recorded, including：
It is filled with into the output gas tank after ammonia reaches the second preset time, closes the replenishment valve.
In technical solution provided in this embodiment, with above-described embodiment it is arranged side by side provide another similar design,
Seal detection-phase, detect to output tank in export ammonia time, when reach after a certain period of time i.e. beginning pressurize operation,
The determination of second preset time is mainly to be predefined by the parameter of replenishment valve and the volume parameter of output tank, the design phase
It is simpler that operation is implemented to above-described embodiment.
To advanced optimize above-mentioned technical proposal, on the basis of the above embodiments preferably, above-mentioned Vehicular exhaust processing
In System self-test method, further include：
Detect whether engine speed reaches rotating speed preset value by ECU, if it is, opening the supplement of output gas tank
Valve, if it is not, then terminating.
In technical solution provided in this embodiment, the design of the self checking method is advanced optimized, in the judgement of air-tightness
The operation conditions of relative vehicle engine is determined before beginning, starts subsequent ammonia again after determining engine normal operation
Gas deferent segment detects and the output and reaction of ammonia, implement to be realized by detecting the rotating speed of engine.
To advanced optimize above-mentioned technical proposal, on the basis of the above embodiments preferably, above-mentioned Vehicular exhaust processing
In System self-test method, further include：
After judging whether engine speed reaches rotating speed preset value, by tail gas pipeline from vent gas treatment case to the storage
High-temperature tail gas heating ammonia storage tank is passed through in ammonia tank；And after getting the first pressure numerical value, stop logical to the ammonia storage tank
Enter high-temperature tail gas.
Relatively low for external environment temperature in technical solution provided in this embodiment, ammonia storage tank is difficult to discharge sufficient ammonia
Situation takes full advantage of the after-heat for the tail gas that vehicle is discharged, and energy is more saved using the tail gas heating ammonia storage tank of high temperature
Source, by the way that the tail gas of high temperature is introduced ammonia storage tank, the storage ammonia solution in effective heating tank promotes ammonia storage tank to discharge ammonia；Pass through
The unlatching of heating makes ammonia amount maintain a suitable amount always with closing.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (6)
1. a kind for the treatment of system for tail gas of automobile self checking method, which is characterized in that including：
The replenishment valve for opening output gas tank, closes its delivery valve, ammonia is filled with into the output gas tank by ammonia storage tank；
The replenishment valve is closed, the gas pressure in output gas tank is detected by pressure sensor, and record first pressure numerical value；
After preset time, the gas pressure in the output gas tank is detected again, and record second pressure numerical value；
It is default to judge whether the air pressure difference is less than for the air pressure difference for calculating the first pressure numerical value and second pressure numerical value
Air pressure difference, if it is not, then the ammonia deferent segment leakproofness of judgement treatment system for tail gas of automobile is unqualified, if so, judgement vehicle
The ammonia deferent segment leakproofness of exhaust treatment system is qualified.
2. treatment system for tail gas of automobile self checking method according to claim 1, which is characterized in that including：
When judging the ammonia deferent segment leakproofness qualification for the treatment of system for tail gas of automobile, the output on the output gas tank is opened
Valve exports ammonia to vent gas treatment case, and periodically opens the replenishment valve, closes the delivery valve and mended into the output tank
Fill ammonia.
3. treatment system for tail gas of automobile self checking method according to claim 2, which is characterized in that described to close the supplement
Valve detects the gas pressure in output gas tank by pressure sensor, and records first pressure numerical value, specially：
During being filled with ammonia into the output gas tank, the gas pressure in output gas tank is detected in real time by pressure sensor
Power closes the replenishment valve when reaching preset pressure value, and it is the first pressure numerical value to record the preset pressure value.
4. treatment system for tail gas of automobile self checking method according to claim 2, which is characterized in that described to close the supplement
Valve detects the gas pressure in output gas tank by pressure sensor, and records first pressure numerical value, including：
It is filled with into the output gas tank after ammonia reaches the second preset time, closes the replenishment valve.
5. according to claim 2 to 4 any one of them treatment system for tail gas of automobile self checking method, which is characterized in that further include：
Detect whether engine speed reaches rotating speed preset value by ECU, if it is, opening the replenishment valve of output gas tank, such as
Fruit is no, then terminates.
6. treatment system for tail gas of automobile self checking method according to claim 5, which is characterized in that further include：
After judging whether engine speed reaches rotating speed preset value, by tail gas pipeline from vent gas treatment case to the ammonia storage tank
Inside it is passed through high-temperature tail gas heating ammonia storage tank；And after getting the first pressure numerical value, stop being passed through height to the ammonia storage tank
Warm tail gas.
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| CN201711484774.6A CN108332918B (en) | 2017-12-29 | 2017-12-29 | Self-checking method of vehicle tail gas treatment system |
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| CN201711484774.6A CN108332918B (en) | 2017-12-29 | 2017-12-29 | Self-checking method of vehicle tail gas treatment system |
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