CN104929736B - The control method of the vehicle-mounted Catalyst Regeneration of combustion gas - Google Patents
The control method of the vehicle-mounted Catalyst Regeneration of combustion gas Download PDFInfo
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- CN104929736B CN104929736B CN201510409239.9A CN201510409239A CN104929736B CN 104929736 B CN104929736 B CN 104929736B CN 201510409239 A CN201510409239 A CN 201510409239A CN 104929736 B CN104929736 B CN 104929736B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses a kind of control method of the vehicle-mounted Catalyst Regeneration of combustion gas, the control method comprises the steps：S1, the catalyst converter ageing time for obtaining ECU storages, judge that catalyst converter ageing time whether not less than the ageing time to prestore, is, into step S2；It is no, into step S3；S2, engine is run to regeneration regime, and continue the recovery time corresponding with the regeneration regime；Regeneration is completed, and catalyst converter ageing time is set to 0；Into step S3；Engine on time is converted into standard catalyst device ageing time by S3, engine normal operation, ECU according to engine operation condition, is stored after cumulative.This method can more accurately know the degree of aging of catalyst converter, and the regeneration of catalyst converter is controlled accordingly, avoid catalyst converter to regenerate when that need not regenerate or just regenerate when aging is excessive, the service life of catalyst converter can be extended, and effectively reduce exhaust contaminant of vehicle.
Description
Technical field
The present invention relates to engine emission technical field, more particularly to a kind of controlling party of the vehicle-mounted Catalyst Regeneration of combustion gas
Method.
Background technology
With the continuous aggravation of environmental pollution, the requirement to vehicle discharge is more and more stricter.At present, generally in fuel gas vehicle
Gas extraction system install vehicle-mounted catalyst converter additional, to reduce the pollutants such as HC emissions, CO.
After the vehicle-mounted catalyst converter of combustion gas uses a period of time, its catalytic efficiency will necessarily reduce, and influence turning for exhaust contaminant
Change efficiency, cause deterioration of emission.
The means being usually taken at present are the artificial ageing time for prejudging catalyst converter, when estimation catalyst converter needs regeneration, control
The operating condition of vehicle processed, the temperature at catalyst converter is improved, makes Catalyst Regeneration, to improve catalytic efficiency.
However, this kind of mode can not accurately control the regeneration of catalyst converter, it is possible that when catalyst converter need not regenerate pair
It regenerates, or catalyst converter just regenerates when aging is excessive to it, not only influences the service life of catalyst converter, also influences the row of vehicle
Put control.
In view of this, how the vehicle-mounted Catalyst Regeneration of combustion gas is accurately controlled, effectively reduces exhaust contaminant of vehicle,
And extend the service life of the vehicle-mounted catalyst converter of combustion gas, it is the current technical issues that need to address of those skilled in the art.
The content of the invention
It is an object of the invention to provide a kind of control method of the vehicle-mounted Catalyst Regeneration of combustion gas, this method can be controlled accurately
The regeneration of the vehicle-mounted catalyst converter of combustion gas, effectively reduces exhaust contaminant of vehicle, and extends the service life of the vehicle-mounted catalyst converter of combustion gas.
In order to solve the above technical problems, the present invention provides a kind of control method of the vehicle-mounted Catalyst Regeneration of combustion gas, the control
Method processed comprises the steps：
S1, the catalyst converter ageing time for obtaining ECU storages, judge catalyst converter ageing time whether not less than the aging to prestore
Time, it is, into step S2；It is no, into step S3；
S2, engine is run to regeneration regime, and continue the recovery time corresponding with the regeneration regime；Regenerate
Into catalyst converter ageing time is set to 0；Into step S3；
Engine on time is converted into standard catalyst by S3, engine normal operation, ECU according to engine operation condition
Device ageing time, stored after cumulative.
As above, the invention provides a kind of control method of the vehicle-mounted Catalyst Regeneration of combustion gas, this method are old according to catalyst converter
Change whether the time reaches the ageing time to prestore, to control whether catalyst converter regenerates, wherein, catalyst converter ageing time is by engine
Run time conversion is accumulated by corresponding to operating condition, is compared and is artificially estimated in the prior art, this method can be more accurately
Know the degree of aging of catalyst converter, and control the regeneration of catalyst converter accordingly, avoid catalyst converter regenerated when that need not regenerate or
Just regenerated when aging is excessive, the service life of catalyst converter can be extended, and effectively reduce exhaust contaminant of vehicle.
Alternatively, in step S2, the regeneration regime of engine is one or more of combinations in following five kinds of modes：
A, the air-fuel ratio of engine is adjusted, temperature at catalyst converter is reached regeneration temperature；
B, catch fire operating mode；
C, air is sprayed at waste pipe, temperature at catalyst converter is reached regeneration temperature；
D, the spray fuel at waste pipe, temperature at catalyst converter is made to reach regeneration temperature；
E, the ignition advance angle of engine is adjusted, temperature at catalyst converter is reached regeneration temperature.
Alternatively, into before step S2, generation catalyst converter needs the state message regenerated, by CAN transmit to
Automobile instrument is simultaneously shown.
Alternatively, in step S2, regeneration is completed, and the state message that generation Catalyst Regeneration is completed, is transmitted by CAN
To automobile instrument and show.
Alternatively, in step S2, if regeneration is interrupted, the unfinished state message of generation Catalyst Regeneration, CAN is passed through
Transmit to automobile instrument and show.
Alternatively, the mode of automobile instrument dispaly state message is light, or voice, or word.
Alternatively, step S0 is also included before step S1：Current atmospheric pressure is obtained, judges current atmospheric pressure whether less than pre-
If value, is to be directly entered step S3；It is no, into step S1.
Alternatively, also comprise the steps between step S1 and S2：
S21, obtained away from burnout time last time, judge whether that reads was less than preset time away from burnout time last time, was, directly
Tap into step S3, it is no, into step S2.
Brief description of the drawings
Fig. 1 is the flow chart of the control method first embodiment of the vehicle-mounted Catalyst Regeneration of combustion gas provided by the present invention；
Fig. 2 is the flow chart of the control method second embodiment of the vehicle-mounted Catalyst Regeneration of combustion gas provided by the present invention；
Fig. 3 is the flow chart of the control method 3rd embodiment of the vehicle-mounted Catalyst Regeneration of combustion gas provided by the present invention.
Embodiment
The core of the present invention is to provide a kind of control method of the vehicle-mounted Catalyst Regeneration of combustion gas, and this method can be controlled accurately
The regeneration of the vehicle-mounted catalyst converter of combustion gas, effectively reduces exhaust contaminant of vehicle, and extends the service life of the vehicle-mounted catalyst converter of combustion gas.
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Fig. 1 is refer to, Fig. 1 is the stream of the control method first embodiment of the vehicle-mounted Catalyst Regeneration of combustion gas provided by the present invention
Cheng Tu.
In the embodiment, the control method of the vehicle-mounted Catalyst Regeneration of combustion gas comprises the following steps：
It is electric on S11, firing key, read the catalyst converter ageing time of ECU storages；
S12, judge that catalyst converter ageing time is no into step S13, entrance whether not less than the ageing time to prestore
Step S14；
Wherein, the ageing time to prestore is the lasting usage time that catalyst converter is regenerated from beginning to use to needing, can
To be obtained in advance by the experiment to catalyst converter or emulation.
S13, start engine, its operation is carried out Catalyst Regeneration to regeneration regime；The duration of regeneration regime reaches
To the recovery time corresponding with regeneration regime, regeneration is completed, catalyst converter ageing time is set to 0；
Generally, by improving regeneration of the temperature realization to catalyst converter at catalyst converter.
In specific scheme, the regeneration regime of engine can be one or more of combinations in following five kinds of modes：
The first, by adjusting the air-fuel ratio of engine, raises the delivery temperature of engine, so as to improve at catalyst converter
Temperature, carry out Catalyst Regeneration；
Second, engine is run under the state of catching fire, and the combustible in exhaust is burnt in blast pipe with the row of raising
Temperature degree, so as to improve the temperature at catalyst converter, carry out Catalyst Regeneration；
The third, air is sprayed at waste pipe, the combustible in exhaust is burnt in blast pipe to carry
High exhaust temperature, so as to improve the temperature at catalyst converter, carry out Catalyst Regeneration；
4th kind, the spray fuel at waste pipe, the combustible in exhaust is set to be burnt in blast pipe to carry
High exhaust temperature, so as to improve the temperature at catalyst converter, carry out Catalyst Regeneration；
5th kind, by adjusting the ignition advance angle of engine, the delivery temperature of engine is raised, so as to improve catalyst converter
The temperature at place, carry out Catalyst Regeneration.
It is pointed out that the combination of above-mentioned several ways refers to being not present the knot of several regenerations of conflict each other
Close.Which mode those skilled in the art can be determined that between conflict be present according to existing knowledge, so as to evade mutual punching
Prominent regeneration combines.
The difference of regeneration, the time that catalyst converter needs regenerate is also different, can corresponding to the recovery time of regeneration regime
It is pre-stored in ECU.Wherein, the recovery time can be obtained by way of Experimental Calibration corresponding to each regeneration regime.
Engine on time is converted into standard according to engine operation condition and urged by S14, engine normal operation, ECU
Change device ageing time, and add up；
It is electric under S15, firing key, engine misses；
It is electric under ECU after S16, accumulator-type catalytic converter ageing time.
Because engine operation condition is different, the degree of aging of catalyst converter is also different, in order to accurately obtain the old of catalyst converter
Change the time, a certain operating condition of engine can be set as standard operating condition, its corresponding engine on time is to mark
Quasi- catalyst converter ageing time, engine, can be according to the operating conditions and the foregoing standard specified when other operating conditions are run
The relation of operating condition, run time corresponding to the operating condition is converted into the corresponding standard under standard operating condition and run
Time, it is that can obtain catalyst converter ageing time after cumulative, after engine misses, accumulator-type catalytic converter ageing time, so as to next point
Read on fire after electricity, and judge whether to need to regenerate catalyst converter.
As above, the control method of the vehicle-mounted Catalyst Regeneration of combustion gas provided by the invention, according to catalyst converter ageing time whether
Reach the ageing time to prestore, to control whether catalyst converter regenerates, wherein, catalyst converter ageing time is by engine operation condition pair
The run time conversion answered is accumulated by, and is compared and is artificially estimated in the prior art, this method can more accurately know catalyst converter
Degree of aging, and accordingly control catalyst converter regeneration, avoid catalyst converter and regenerated when that need not regenerate, or aging is excessive
Just regenerate, the service life of catalyst converter can be extended, and effectively reduce exhaust contaminant of vehicle.
In specific scheme, into before abovementioned steps S13, that is, judge that catalyst converter is needed after regenerating, also generate catalyst converter
The state message regenerated is needed, and is transmitted by CAN, automobile instrument captures catalyst converter from CAN needs what is regenerated
State message is simultaneously shown.
Further, in step 13, when regeneration is completed, i.e., regeneration regime continues the corresponding recovery time, generation
The state message that Catalyst Regeneration is completed, and transmitted by CAN, automobile instrument captures Catalyst Regeneration from CAN
The state message of completion and display.
Further, in step 13, if regeneration is interrupted, i.e. the duration of regeneration regime is not up to corresponding regeneration
Time, the unfinished state message of generation Catalyst Regeneration, and transmitted by CAN, automobile instrument captures from CAN
The unfinished state message of Catalyst Regeneration and display.
It is pointed out that in practical operation, probably due to the human factor of driver or other external factor cause
Engine misses, so that regeneration is interrupted.
As above, the reproduced state of catalyst converter is shown by automobile instrument, driver can be made to know vehicle condition in time, and
It can independently be selected according to the actual requirements, strengthen the handling of driver.
Specifically, automobile instrument can be by way of light, or the mode of voice or the mode of word show catalyst converter
Each state message of regeneration.
Fig. 2 is refer to, Fig. 2 is the stream of the control method second embodiment of the vehicle-mounted Catalyst Regeneration of combustion gas provided by the present invention
Cheng Tu.
The control method of the present embodiment comprises the following steps：
It is electric on S21, firing key；
S22, current atmospheric pressure is obtained, judges whether current atmospheric pressure is less than preset value, be to be directly entered step S26,
It is no, into step S23；
S23, the catalyst converter ageing time for reading ECU storages；
S24, judge that catalyst converter ageing time is no into step S25, entrance whether not less than the ageing time to prestore
Step S26；
S25, start engine, its operation is carried out Catalyst Regeneration to regeneration regime；The duration of regeneration regime reaches
To the recovery time corresponding with regeneration regime, regeneration is completed, catalyst converter ageing time is set to 0；
Engine on time is converted into standard according to engine operation condition and urged by S26, engine normal operation, ECU
Change device ageing time, and add up；
It is electric under S27, firing key, engine misses；
It is electric under ECU after S28, accumulator-type catalytic converter ageing time.
Compared with aforementioned first embodiment, difference in this case is that, judging whether catalyst converter ageing time is not small
Before the ageing time to prestore, also current atmospheric pressure is judged, if current atmospheric pressure is less than preset value, without right
Catalyst converter is regenerated, and is directly entered the state of engine normal operation.
Because in highlands, the discharge limitation to vehicle is relatively low, now, car can be made without be regenerated to catalyst converter
It can be made adjustment according to running environment, flexibility is higher.
Wherein, the preset value of atmospheric pressure can be set according to relevant laws and regulations or actual conditions.
Fig. 3 is refer to, Fig. 3 is the stream of the control method 3rd embodiment of the vehicle-mounted Catalyst Regeneration of combustion gas provided by the present invention
Cheng Tu.
The control method of the present embodiment comprises the following steps：
It is electric on S31, firing key, read the catalyst converter ageing time of ECU storages；
S32, judge whether catalyst converter ageing time is not less than the ageing time to prestore, be, it is no into step S321, enter
Enter step S34；
S321, obtained away from burnout time last time, judge whether what is obtained was less than preset time away from burnout time last time, was,
Step S34 is directly entered, it is no, into step S33；
S33, start engine, its operation is carried out Catalyst Regeneration to regeneration regime；The duration of regeneration regime reaches
To the recovery time corresponding with regeneration regime, regeneration is completed, catalyst converter ageing time is set to 0；
Engine on time is converted into standard according to engine operation condition and urged by S34, engine normal operation, ECU
Change device ageing time, and add up；
It is electric under S35, firing key, engine misses；
It is electric under ECU after S36, accumulator-type catalytic converter ageing time.
Compared with aforementioned first embodiment, difference in this case is that, judging catalyst converter ageing time not less than pre-
After the ageing time deposited, that is, judge that catalyst converter is needed after regenerating, also add to the judgement away from burnout time last time, because actual
In, vehicle is in normal operation, probably due to surprisingly making engine misses, after restarting, vehicle still needs to normal operation, and does not have
Set aside some time to Catalyst Regeneration, now, if being less than preset time away from burnout time last time, then it is assumed that do not set aside some time to
Catalyst Regeneration, make engine normal operation, otherwise catalyst converter is regenerated.
Wherein, the preset time stopped working away from last time can be set according to the actual requirements.
It is to be herein pointed out during actual setting, second embodiment can be combined with 3rd embodiment, i.e., both to working as
Preceding air is judged, also to judging away from burnout time last time.
A kind of control method of the vehicle-mounted Catalyst Regeneration of combustion gas provided by the present invention is described in detail above.This
Apply specific case in text to be set forth the principle and embodiment of the present invention, the explanation of above example is only intended to
Help to understand method and its core concept of the invention.It should be pointed out that for those skilled in the art,
Without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls
Enter in the protection domain of the claims in the present invention.
Claims (8)
1. the control method of the vehicle-mounted Catalyst Regeneration of combustion gas, it is characterised in that the control method comprises the steps：
S1, the catalyst converter ageing time for obtaining ECU storages, when whether judging catalyst converter ageing time not less than the aging to prestore
Between, it is, into step S2；It is no, into step S3；
S2, engine is run to regeneration regime, and continue the recovery time corresponding with the regeneration regime；Regeneration is completed, will
Catalyst converter ageing time is set to 0；Into step S3；
S3, engine normal operation, it is old that engine on time according to engine operation condition is converted into standard catalyst device by ECU
Change the time, stored after cumulative.
2. control method according to claim 1, it is characterised in that in step S2, the regeneration regime of engine is following
One or more of combinations in five kinds of modes：
A, the air-fuel ratio of engine is adjusted, temperature at catalyst converter is reached regeneration temperature；
B, catch fire operating mode；
C, air is sprayed at waste pipe, temperature at catalyst converter is reached regeneration temperature；
D, the spray fuel at waste pipe, temperature at catalyst converter is made to reach regeneration temperature；
E, the ignition advance angle of engine is adjusted, temperature at catalyst converter is reached regeneration temperature.
3. control method according to claim 1, it is characterised in that into before step S2, generation catalyst converter needs again
Raw state message, transmit to automobile instrument and show by CAN.
4. control method according to claim 3, it is characterised in that in step S2, regeneration is completed, and generates Catalyst Regeneration
The state message of completion, transmit to automobile instrument and show by CAN.
5. control method according to claim 4, it is characterised in that in step S2, if regeneration is interrupted, generation catalyst converter is again
Raw unfinished state message, is transmitted to automobile instrument and is shown by CAN.
6. according to the control method described in claim any one of 3-5, it is characterised in that the side of automobile instrument dispaly state message
Formula is light, or voice, or word.
7. according to the control method described in claim any one of 1-5, it is characterised in that also include step S0 before step S1：
Current atmospheric pressure is obtained, judges whether current atmospheric pressure is less than preset value, is to be directly entered step S3；It is no, into step S1.
8. according to the control method described in claim any one of 1-5, it is characterised in that also include between step S1 and S2 following
Step：
S21, obtained away from burnout time last time, judge whether that reads was less than preset time away from burnout time last time, was directly to enter
Enter step S3, it is no, into step S2.
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| CN110672653B (en) * | 2019-10-24 | 2022-12-02 | 浙江达峰汽车技术有限公司 | Method for simulating aging of automobile exhaust purification catalyst |
| GB2601799B (en) * | 2020-12-10 | 2023-06-28 | Caterpillar Energy Solutions Gmbh | Method and apparatus for regenerating an exhaust gas catalyst in a gas engine |
| CN114810287B (en) * | 2021-06-17 | 2023-07-07 | 长城汽车股份有限公司 | Method, system and vehicle for correcting LNT aging |
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| DE10007049A1 (en) * | 2000-02-17 | 2001-08-23 | Volkswagen Ag | Controling oxides of nitrogen storage catalyser regeneration involves detecting idling, raising threshold in idling state, initiating regeneration after period, stopping if idling resumes |
| FR2982317B1 (en) * | 2011-11-07 | 2016-02-12 | Peugeot Citroen Automobiles Sa | METHOD FOR AIDING THE REGENERATION OF A PARTICLE FILTER |
| CN102383905B (en) * | 2011-11-08 | 2012-12-26 | 上海三一重机有限公司 | Intelligent control method for after-treatment regeneration of engine for engineering machinery |
| KR101880307B1 (en) * | 2011-12-23 | 2018-07-20 | 두산인프라코어 주식회사 | Forced Regeneration Control Machine for Diesel Particulate Filter |
| CN104153857B (en) * | 2013-05-15 | 2018-01-30 | 罗伯特·博世有限公司 | Can initiative regeneration exhaust gas aftertreatment system and its initiative regeneration method |
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