CN109306893A - A kind of monitoring method, device and the diesel vehicle of diesel oxidation catalyst transfer efficiency - Google Patents
A kind of monitoring method, device and the diesel vehicle of diesel oxidation catalyst transfer efficiency Download PDFInfo
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- CN109306893A CN109306893A CN201811130262.4A CN201811130262A CN109306893A CN 109306893 A CN109306893 A CN 109306893A CN 201811130262 A CN201811130262 A CN 201811130262A CN 109306893 A CN109306893 A CN 109306893A
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1621—Catalyst conversion efficiency
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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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1631—Heat amount provided to exhaust apparatus
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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
- 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)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas After Treatment (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The present invention provides monitoring method, device and the diesel vehicle of a kind of diesel oxidation catalyst transfer efficiency, the method, if obtaining transfer efficiency monitoring instruction, controls the fuel oil of fuel injection equipment (FIE) injection designated volume when normal vehicle operation；Then corresponding theoretical releasing heat and practical releasing heat after the fuel oil burns in specific time are obtained；According to the theoretical releasing heat and the practical releasing heat Calculation transfer efficiency；If the last transfer efficiency is lower than preset limit, fault message is recorded.In the embodiment of the present invention, in normal vehicle operation, fuel oil can be sprayed actively to be monitored to diesel oxidation catalyst transfer efficiency, heat is released according to theoretical releasing heat and reality to calculate transfer efficiency, and when transfer efficiency is lower than preset limit, fault message is recorded, controllability is good, realizes the monitoring to diesel oxidation catalyst transfer efficiency.
Description
Technical field
The present invention relates to Diesel Engine Technique Field more particularly to a kind of monitoring sides of diesel oxidation catalyst transfer efficiency
Method, device and diesel vehicle.
Background technique
Diesel engine has the characteristics that power is big, economic performance is good.Diesel engine has higher efficiency of combustion compared to gasoline engine.
But opposite, carbon nitrogen oxide in diesel engine vent gas etc. is granular material discharged to be higher than gasoline engine.
In the prior art, after-treatment system can effectively reduce the discharge of particulate matter.Wherein, after-treatment system mainly can be with
Including DOC (Diesel Oxidation Catalyst) diesel oxidation catalyst and DPF (Diesel Particulate
Filter) diesel particulate trap.DOC can oxidation of hydrocarbons for DPF capture particle temperature environment is provided.
Therefore, the method that a kind of pair of diesel oxidation catalyst transfer efficiency carries out effective monitoring is needed.
Summary of the invention
The purpose of the present invention is to provide monitoring method, device and the diesel oil of a kind of diesel oxidation catalyst transfer efficiency
Vehicle, in order to carry out effective monitoring to diesel oxidation catalyst transfer efficiency.
In order to achieve the above objectives, the present invention provides a kind of monitoring methods of diesel oxidation catalyst transfer efficiency, dress
It sets and diesel vehicle.
A kind of monitoring method of diesel oxidation catalyst transfer efficiency disclosed by the invention, comprising:
When normal vehicle operation, if obtaining transfer efficiency monitoring instruction, fuel injection equipment (FIE) injection particular volume is controlled
Long-pending fuel oil；
Obtain corresponding theoretical releasing heat and practical releasing heat after the fuel oil burns in specific time；
According to the theoretical releasing heat and the practical releasing heat Calculation transfer efficiency；
If the transfer efficiency is lower than preset limit, fault message is recorded.
Preferably, the acquisition transfer efficiency monitoring, which instructs, includes:
If it is determined that current vehicle driving cycle meets instruction formation condition, then transfer efficiency monitoring instruction is generated；The vehicle
Driving cycle includes at least any one of operating range, oil consumption or engine on time；
If it is determined that current vehicle device parameter meets instruction triggers condition, then the transfer efficiency monitoring instruction is obtained；Institute
Vehicle arrangement parameter is stated for characterizing data measured by the sensor of the vehicle installation.
Preferably, the method also includes:
Judge the record number of the fault message；
If the record number is more than preset times, fault warning information is issued；
Otherwise, it returns and executes the step of obtaining transfer efficiency monitoring instruction.
Preferably, described to include: according to the theoretical releasing heat and the practical heat Calculation transfer efficiency of releasing
The transfer efficiency is calculated according to transfer efficiency calculation formula；
The transfer efficiency calculation formula includes:
Wherein, the RHCFor characterizing transfer efficiency, the Q1For characterizing the practical releasing heat,
The Q2For characterizing the theoretical releasing heat.
Preferably, the Q1It is determined by the first specific formulation, the Q2It is determined by the second specific formulation；
First specific formulation specifically includes:
Wherein, the C is exhaust thermal capacitance, the m1For exhaust mass flow, the t1For the survey of DOC downstream temperature sensor
Magnitude, the t2For DOC upstream temperature sensor measured value, t is the specific time；
Second specific formulation specifically includes:
Wherein, the f is fuel oil calorific value, the m2For the mass flow for spraying fuel oil.
Preferably, the determining current vehicle driving cycle meet instruction formation condition include:
Judge whether current driving distance is more than default first limits value, obtains the first judging result；
Judge whether current oil consumption is more than default second limits value, obtains the second judging result；
Judge whether present engine operation duration is more than third limits value, obtains third judging result；
If first court verdict, second judging result and the third judging result are when being, really
Settled vehicle in front driving cycle meets instruction formation condition.
Another aspect of the present invention discloses a kind of monitoring device of diesel oxidation catalyst transfer efficiency, comprising:
Fuel injection equipment (FIE), for if obtaining transfer efficiency monitoring instruction, controlling fuel oil spray when normal vehicle operation
The fuel oil of injection device injection designated volume；
Parameter obtaining device, for obtain after the fuel oil burns in specific time it is corresponding it is theoretical release heat and
It is practical to release heat；
Computing device, for according to the theoretical releasing heat and the practical releasing heat Calculation transfer efficiency；
Failure recording device records fault message if being lower than preset limit for the transfer efficiency.
Preferably, the fuel injection equipment (FIE) specifically includes:
Instruction generation unit, for if it is determined that current vehicle driving cycle meets instruction formation condition, then generating conversion effect
Rate monitoring instruction；The vehicle driving-cycle includes at least any one of operating range, oil consumption or engine on time；
Obtaining unit is instructed, for if it is determined that current vehicle device parameter meets instruction triggers condition, then acquisition is described to turn
Change efficiency monitoring instruction；The vehicle arrangement parameter is used to characterize data measured by the sensor of the vehicle installation.
Preferably, described device further includes alarm device；
The alarm device is used for:
Judge the record number of the fault message；
If the record number is more than preset times, fault warning information is issued；
Otherwise, it returns and executes the step of obtaining transfer efficiency monitoring instruction.
Another aspect of the present invention also discloses a kind of diesel vehicle, including monitoring device described above.
As can be seen from the above technical solutions, compared with prior art, the present invention provides a kind of diesel oxidation catalysts
Monitoring method, device and the diesel vehicle of transfer efficiency, the monitoring method is when normal vehicle operation, if obtaining transfer efficiency prison
Control instruction then controls the fuel oil of fuel injection equipment (FIE) injection designated volume；Then the fuel oil is obtained to burn in specific time
Corresponding theoretical releasing heat and practical releasing heat afterwards；According to the theoretical releasing heat and the practical releasing heat
Calculate transfer efficiency；If the last transfer efficiency is lower than preset limit, fault message is recorded.In the embodiment of the present invention,
In normal vehicle operation, fuel oil can be actively sprayed to be monitored to diesel oxidation catalyst transfer efficiency, according to reason
Transfer efficiency is calculated by heat and practical releasing heat is released, and when transfer efficiency is lower than preset limit, records failure
Information, controllability is good, realizes the monitoring to diesel oxidation catalyst transfer efficiency.
Detailed description of the invention
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 technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow diagram of the monitoring method of diesel oxidation catalyst transfer efficiency provided by the invention；
Fig. 2 is that a kind of another process of the monitoring method of diesel oxidation catalyst transfer efficiency provided by the invention is shown
It is intended to；
Fig. 3 is that a kind of another process of the monitoring method of diesel oxidation catalyst transfer efficiency provided by the invention is shown
It is intended to；
Fig. 4 is a kind of structural schematic diagram of the monitoring device of diesel oxidation catalyst transfer efficiency provided by the invention.
Specific embodiment
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 description, 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.
Present invention is mainly applied in the scene of diesel vehicle, for realizing the prison to diesel oxidation catalyst transfer efficiency
Control.
It is a kind of process of the monitoring method of diesel oxidation catalyst transfer efficiency provided by the invention referring to Fig. 1, Fig. 1
Schematic diagram.
A kind of monitoring method of diesel oxidation catalyst transfer efficiency disclosed by the invention, comprising:
S101, when normal vehicle operation, if obtaining transfer efficiency monitoring instruction, it is special to control fuel injection equipment (FIE) injection
Determine the fuel oil of volume；
In the embodiment of the present invention, when normal vehicle operation, in the normal mode, refer to if obtaining transfer efficiency monitoring
It enables, then sprays the fuel oil of designated volume.Wherein designated volume can be demarcated in advance according to the actual situation.
Wherein, fuel injection equipment (FIE) can be the HC spraying system or rear spraying system before DOC.
It is understood that the premise for obtaining transfer efficiency monitoring instruction is after meeting certain condition, detailed process is rear
Face describes in detail.
S102, corresponding theoretical releasing heat and practical releasing heat after the fuel oil burns in specific time are obtained
Amount；
S103, heat Calculation transfer efficiency is released according to the theoretical releasing heat and the reality；
After jetted the fuel oil of designated volume, DOC transfer efficiency can be calculated.
Wherein, described to include: according to the theoretical releasing heat and the practical heat Calculation transfer efficiency of releasing
The transfer efficiency is calculated according to transfer efficiency calculation formula；
The transfer efficiency calculation formula includes:
Wherein, the RHCFor characterizing transfer efficiency, the Q1For characterizing the practical releasing heat,
The Q2For characterizing the theoretical releasing heat.
The Q1It is determined by the first specific formulation, the Q2It is determined by the second specific formulation；
First specific formulation specifically includes:
Wherein, the C is exhaust thermal capacitance, the m1For exhaust mass flow, the t1For the survey of DOC downstream temperature sensor
Magnitude, the t2For DOC upstream temperature sensor measured value, t is the specific time；
Second specific formulation specifically includes:
Wherein, the f is fuel oil calorific value, the m2For the mass flow for spraying fuel oil.
It is understood that the unit of fuel oil calorific value is J/g, the unit for spraying the mass flow of fuel oil is g/s, the list of t
Position can be the second, and the unit for being vented thermal capacitance can be J/ (Kg*k), and the unit of exhaust mass flow is kg/s.Wherein, fuel oil heat
Value can be 41000J/g, and exhaust thermal capacitance can be 1200J/ (Kg*k), and the time can be 60 seconds.Wherein m1And m2It can lead to
Sensor acquisition is crossed, or reads the data saved in relevant apparatus.
If S104, the transfer efficiency are lower than preset limit, fault message is recorded.
In the embodiment of the present invention, if calculated transfer efficiency is lower than preset limit, mean for example due to hot old
Change or the factors such as sulfur poisoning make current DOC transfer efficiency be possible to there is a problem, records fault message at this time.It is understood that
If transfer efficiency is normal, recorded fault message is removed.Or the information of record normal condition.
The present invention provides a kind of monitoring methods of diesel oxidation catalyst transfer efficiency, when normal vehicle operation,
If obtaining transfer efficiency monitoring instruction, the fuel oil of fuel injection equipment (FIE) injection designated volume is controlled；Then the fuel oil is obtained
Corresponding theoretical releasing heat and practical releasing heat after burning in specific time；According to it is described it is theoretical release heat and
The practical releasing heat Calculation transfer efficiency；If the last transfer efficiency is lower than preset limit, fault message is recorded.
In the embodiment of the present invention, in normal vehicle operation, it can actively spray fuel oil and come to diesel oxidation catalyst transfer efficiency
It is monitored, releases heat according to theory releasing heat and reality to calculate transfer efficiency, and be lower than in transfer efficiency and limit in advance
When value processed, fault message is recorded, controllability is good, realizes the monitoring to diesel oxidation catalyst transfer efficiency.
Referring to fig. 2, Fig. 2 is a kind of the another of the monitoring method of diesel oxidation catalyst transfer efficiency provided by the invention
Kind flow diagram.
S201, if it is determined that current vehicle driving cycle meets instruction formation condition, then generate transfer efficiency monitoring instruction；Institute
State any one that vehicle driving-cycle includes at least operating range, oil consumption or engine on time；
S202, if it is determined that current vehicle device parameter meets instruction triggers condition, then obtain the transfer efficiency monitoring and refer to
It enables；The vehicle arrangement parameter is used to characterize data measured by the sensor of the vehicle installation.
In the embodiment of the present invention, the condition of starting transfer efficiency monitoring process can by two steps, S201 and
S202, wherein S201 can be the formation condition of transfer efficiency monitoring instruction, and S202 can be putting for transfer efficiency monitoring instruction
Row condition.
Wherein, the determining current vehicle driving cycle of S201 meet instruction formation condition include:
Judge whether current driving distance is more than default first limits value, obtains the first judging result；
Judge whether current oil consumption is more than default second limits value, obtains the second judging result；
Judge whether present engine operation duration is more than third limits value, obtains third judging result；
If first court verdict, second judging result and the third judging result are when being, really
Settled vehicle in front driving cycle meets instruction formation condition.
It is understood that current driving distance can be the operating range after the completion of the last monitoring of distance；Current oil
Consumption can be the oil consumption after the completion of the last monitoring of distance；Present engine operation duration can be the last monitoring of distance and complete
Engine operation duration afterwards.
Or the data in first limits value, the second limits value, third limits value can be marked according to actual needs
It is fixed.Such as first limits value when can be demarcated as every 20 kilometers.
Current vehicle device parameter meets instruction triggers condition, may include:
1, DOC upstream temperature sensor measured value is in a certain range；
2, DOC downstream temperature sensor measured value is in a certain range；
3, engine is greater than limit value in the runing time of normal (Normal) mode；
4, exhaust mass flow is in a certain range；
5, torque setting value is greater than limit value；
6, engine temperature is greater than limit value；
7, environment temperature is greater than limit value；
8, environmental pressure is greater than limit value；
9, engine speed is greater than limit value；
10, oil tank liquid level is greater than limit value.
The release of the above-metioned instruction trigger condition property of can choose, is arranged according to the actual situation.
S203, corresponding theoretical releasing heat and practical releasing heat after the fuel oil burns in specific time are obtained
Amount；
S204, heat Calculation transfer efficiency is released according to the theoretical releasing heat and the reality；
If S205, the transfer efficiency are lower than preset limit, fault message is recorded.
Wherein, the implementation procedure of S203-S205 is referred to the S102-S104 in above-described embodiment, herein without superfluous
It states.
Therefore, in the embodiment of the present invention, the formation condition of transfer efficiency monitoring instruction and putting for transfer efficiency monitoring instruction
When row condition is all satisfied, transfer efficiency monitoring instruction is obtained, active multi-injection fuel oil monitors the transformation efficiency of DOC.
It is a kind of the another of the monitoring method of diesel oxidation catalyst transfer efficiency provided by the invention referring to Fig. 3, Fig. 3
Kind flow diagram.
On the basis of the above embodiments, further includes:
S301, the record number for judging the fault message；
If S302, the record number are more than preset times, fault warning information is issued；
Otherwise, it returns and executes the step of obtaining transfer efficiency monitoring instruction.
In the embodiment of the present invention, issuing fault warning information can determine according to record number.
If record number has been more than preset times, such as 3 times, then need to issue fault warning information, to prompt user.
It is understood that due to fault message be just will record in failure, and it is normal when can be removed, therefore, if record
Number is more than preset times, can refer to that the preset times for continuously performing transfer efficiency monitoring instruction are wrong.
As can be seen that can effectively realize the monitoring to DOC transfer efficiency in the embodiment of the present invention.
Method is described in detail in aforementioned present invention disclosed embodiment, diversified forms can be used for method of the invention
Device realize that therefore the invention also discloses a kind of devices, and specific embodiment is given below and is illustrated.
Referring to fig. 4, Fig. 4 is a kind of structure of the monitoring device of diesel oxidation catalyst transfer efficiency disclosed by the invention
Schematic diagram.
A kind of monitoring device of diesel oxidation catalyst transfer efficiency provided by the invention, comprising:
Fuel injection equipment (FIE) 1, for if obtaining transfer efficiency monitoring instruction, controlling fuel oil when normal vehicle operation
The fuel oil of injection apparatus injection designated volume；
Parameter obtaining device 2, for obtain after the fuel oil burns in specific time it is corresponding it is theoretical release heat with
And practical releasing heat；
Computing device 3, for according to the theoretical releasing heat and the practical releasing heat Calculation transfer efficiency；
Failure recording device 4 records fault message if being lower than preset limit for the transfer efficiency.
Preferably, the fuel injection equipment (FIE) specifically includes:
Instruction generation unit, for if it is determined that current vehicle driving cycle meets instruction formation condition, then generating conversion effect
Rate monitoring instruction；The vehicle driving-cycle includes at least any one of operating range, oil consumption or engine on time；
Obtaining unit is instructed, for if it is determined that current vehicle device parameter meets instruction triggers condition, then acquisition is described to turn
Change efficiency monitoring instruction；The vehicle arrangement parameter is used to characterize data measured by the sensor of the vehicle installation.
Preferably, described device further includes alarm device；
The alarm device is used for:
Judge the record number of the fault message；
If the record number is more than preset times, fault warning information is issued；
Otherwise, it returns and executes the step of obtaining transfer efficiency monitoring instruction.
The present invention provides a kind of monitoring devices of diesel oxidation catalyst transfer efficiency, when normal vehicle operation,
If obtaining transfer efficiency monitoring instruction, the fuel oil of fuel injection equipment (FIE) injection designated volume is controlled；Then the fuel oil is obtained
Corresponding theoretical releasing heat and practical releasing heat after burning in specific time；According to it is described it is theoretical release heat and
The practical releasing heat Calculation transfer efficiency；If the last transfer efficiency is lower than preset limit, fault message is recorded.
In the embodiment of the present invention, in normal vehicle operation, it can actively spray fuel oil and come to diesel oxidation catalyst transfer efficiency
It is monitored, releases heat according to theory releasing heat and reality to calculate transfer efficiency, and be lower than in transfer efficiency and limit in advance
When value processed, fault message is recorded, controllability is good, realizes the monitoring to diesel oxidation catalyst transfer efficiency.
Another aspect of the present invention additionally provides a kind of diesel vehicle, including monitoring device described above.
The present invention provides a kind of diesel vehicles, when normal vehicle operation, if obtaining transfer efficiency monitoring instruction, control
The fuel oil of fuel injection equipment (FIE) injection designated volume；Then corresponding theory after the fuel oil burns in specific time is obtained to put
Heat and practical releasing heat out；According to the theoretical releasing heat and the practical releasing heat Calculation transfer efficiency；
If the last transfer efficiency is lower than preset limit, fault message is recorded.In the embodiment of the present invention, in normal vehicle operation
When, fuel oil can be sprayed actively to be monitored to diesel oxidation catalyst transfer efficiency, release heat and reality according to theoretical
Border releases heat to calculate transfer efficiency, and when transfer efficiency is lower than preset limit, records fault message, controllability
It is good, realize the monitoring to diesel oxidation catalyst transfer efficiency.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments makes professional and technical personnel in the field can be realized or use the application.
Various modifications to these embodiments will be readily 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 application.Therefore, the application
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 scope of cause.
Claims (10)
1. a kind of monitoring method of diesel oxidation catalyst transfer efficiency characterized by comprising
When normal vehicle operation, if obtaining transfer efficiency monitoring instruction, fuel injection equipment (FIE) injection designated volume is controlled
Fuel oil；
Obtain corresponding theoretical releasing heat and practical releasing heat after the fuel oil burns in specific time；
According to the theoretical releasing heat and the practical releasing heat Calculation transfer efficiency；
If the transfer efficiency is lower than preset limit, fault message is recorded.
2. monitoring method according to claim 1, which is characterized in that described to obtain the transfer efficiency monitoring instruction packet
It includes:
If it is determined that current vehicle driving cycle meets instruction formation condition, then transfer efficiency monitoring instruction is generated；The vehicle row
Sail any one that operating condition includes at least operating range, oil consumption or engine on time；
If it is determined that current vehicle device parameter meets instruction triggers condition, then the transfer efficiency monitoring instruction is obtained；The vehicle
Device parameter is used to characterize data measured by the sensor of the vehicle installation.
3. monitoring method according to claim 1, which is characterized in that the method also includes:
Judge the record number of the fault message；
If the record number is more than preset times, fault warning information is issued；
Otherwise, it returns and executes the step of obtaining transfer efficiency monitoring instruction.
4. monitoring method according to claim 1, which is characterized in that described according to the theoretical releasing heat and described
Reality releases heat Calculation transfer efficiency
The transfer efficiency is calculated according to transfer efficiency calculation formula；
The transfer efficiency calculation formula includes:
Wherein, the RHCFor characterizing transfer efficiency, the Q1For characterizing the practical releasing heat, the Q2
For characterizing the theoretical releasing heat.
5. monitoring method according to claim 4, which is characterized in that the Q1It is determined by the first specific formulation, the Q2
It is determined by the second specific formulation；
First specific formulation specifically includes:
Wherein, the C is exhaust thermal capacitance, the m1For exhaust mass flow, the t1For DOC downstream temperature sensor measured value,
The t2For DOC upstream temperature sensor measured value, t is the specific time；
Second specific formulation specifically includes:
Wherein, the f is fuel oil calorific value, the m2For the mass flow for spraying fuel oil.
6. monitoring method according to claim 2, the determining current vehicle driving cycle meets instruction formation condition packet
It includes:
Judge whether current driving distance is more than default first limits value, obtains the first judging result；
Judge whether current oil consumption is more than default second limits value, obtains the second judging result；
Judge whether present engine operation duration is more than third limits value, obtains third judging result；
If first court verdict, second judging result and the third judging result are when being, it is determined that when
Vehicle in front driving cycle meets instruction formation condition.
7. a kind of monitoring device of diesel oxidation catalyst transfer efficiency characterized by comprising
Fuel injection equipment (FIE), for if obtaining transfer efficiency monitoring instruction, controlling fuel oil injection dress when normal vehicle operation
Set the fuel oil of injection designated volume；
Parameter obtaining device, for obtaining corresponding theoretical releasing heat and reality after the fuel oil burns in specific time
Release heat；
Computing device, for according to the theoretical releasing heat and the practical releasing heat Calculation transfer efficiency；
Failure recording device records fault message if being lower than preset limit for the transfer efficiency.
8. monitoring device according to claim 7, which is characterized in that the fuel injection equipment (FIE) specifically includes:
Instruction generation unit, for if it is determined that current vehicle driving cycle meets instruction formation condition, then generating transfer efficiency prison
Control instruction；The vehicle driving-cycle includes at least any one of operating range, oil consumption or engine on time；
Obtaining unit is instructed, is imitated for if it is determined that current vehicle device parameter meets instruction triggers condition, then obtaining the conversion
Rate monitoring instruction；The vehicle arrangement parameter is used to characterize data measured by the sensor of the vehicle installation.
9. monitoring device according to claim 7, which is characterized in that described device further includes alarm device；
The alarm device is used for:
Judge the record number of the fault message；
If the record number is more than preset times, fault warning information is issued；
Otherwise, it returns and executes the step of obtaining transfer efficiency monitoring instruction.
10. a kind of diesel vehicle, which is characterized in that including monitoring device described in claim 7 to 9 any one.
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| CN201811130262.4A CN109306893A (en) | 2018-09-27 | 2018-09-27 | A kind of monitoring method, device and the diesel vehicle of diesel oxidation catalyst transfer efficiency |
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| CN201811130262.4A CN109306893A (en) | 2018-09-27 | 2018-09-27 | A kind of monitoring method, device and the diesel vehicle of diesel oxidation catalyst transfer efficiency |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706423A (en) * | 2020-06-24 | 2020-09-25 | 东风商用车有限公司 | Test method for diagnosing faults of exhaust gas purification system of diesel engine |
| CN114483278A (en) * | 2022-02-18 | 2022-05-13 | 安徽华菱汽车有限公司 | DOC system fault monitoring device and fault detection method |
| CN114635775A (en) * | 2022-02-28 | 2022-06-17 | 上海和夏骏智科技有限公司 | DOC performance detection method and system for diesel engine |
| CN115163267A (en) * | 2022-08-26 | 2022-10-11 | 潍柴动力股份有限公司 | DOC (document management interface) diagnosis method and aftertreatment system |
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| CN107044325A (en) * | 2017-06-15 | 2017-08-15 | 无锡威孚力达催化净化器有限责任公司 | The monitoring method of DOC temperature rise models, monitoring device and system in diesel engine after treatment |
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| CN111706423A (en) * | 2020-06-24 | 2020-09-25 | 东风商用车有限公司 | Test method for diagnosing faults of exhaust gas purification system of diesel engine |
| CN111706423B (en) * | 2020-06-24 | 2021-05-11 | 东风商用车有限公司 | Test method for diagnosing faults of exhaust gas purification system of diesel engine |
| CN114483278A (en) * | 2022-02-18 | 2022-05-13 | 安徽华菱汽车有限公司 | DOC system fault monitoring device and fault detection method |
| CN114635775A (en) * | 2022-02-28 | 2022-06-17 | 上海和夏骏智科技有限公司 | DOC performance detection method and system for diesel engine |
| CN115163267A (en) * | 2022-08-26 | 2022-10-11 | 潍柴动力股份有限公司 | DOC (document management interface) diagnosis method and aftertreatment system |
| CN115163267B (en) * | 2022-08-26 | 2023-11-17 | 潍柴动力股份有限公司 | DOC diagnosis method and aftertreatment system |
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