CN107091143A - A kind of monitoring method, supervising device and the system of diesel engine after treatment temperature signal - Google Patents
A kind of monitoring method, supervising device and the system of diesel engine after treatment temperature signal Download PDFInfo
- Publication number
- CN107091143A CN107091143A CN201710450763.XA CN201710450763A CN107091143A CN 107091143 A CN107091143 A CN 107091143A CN 201710450763 A CN201710450763 A CN 201710450763A CN 107091143 A CN107091143 A CN 107091143A
- Authority
- CN
- China
- Prior art keywords
- temperature
- diesel
- booster
- scr device
- demarcation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
-
- 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
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0416—Methods of control or diagnosing using the state of a sensor, e.g. of an exhaust gas sensor
-
- 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
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
- F01N2900/1404—Exhaust gas temperature
-
- 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
- F01N2900/1602—Temperature of exhaust gas apparatus
-
- 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
Landscapes
- 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)
Abstract
The invention discloses a kind of monitoring method of diesel engine after treatment temperature signal, wherein, diesel engine post-processing system includes booster, the temperature sensor being connected with booster by gas exhaust piping and the diesel oxidation catalyst being sequentially connected with booster by gas exhaust piping, diesel particulate trap and SCR device, and the monitoring method of diesel engine after treatment temperature signal includes：The Current Temperatures that collecting temperature sensor is detected；Calculate the demarcation delivery temperature after booster；Calculate the temperature gap between the Current Temperatures that demarcation delivery temperature and temperature sensor after booster are detected；When temperature gap is in error allowed band, judges that temperature sensor is working properly, otherwise, send fault-signal.The invention also discloses a kind of supervising device of diesel engine after treatment temperature signal and a kind of diesel engine post-processing system.The monitoring method for the diesel engine after treatment temperature signal that the present invention is provided can monitor whether post processing signal is accurate.
Description
Technical field
The present invention relates to diesel engine after treatment temperature monitoring field, more particularly to a kind of diesel engine after treatment temperature signal
Monitoring method, a kind of supervising device of diesel engine after treatment temperature signal and a kind of include the prison of diesel engine after treatment temperature signal
Control the diesel engine post-processing system of device.
Background technology
With the implementation of more and more stricter diesel engine emissions regulations, emission controls by improving combustion measure is only relied on simultaneously NOxWith PM drops
It is low to have become more and more difficult to the requirement for meeting future emission regulation, therefore, in the advanced internal purification technology of diesel engine
On the basis of, aid in effective exhaust aftertreatment technology to turn into the development trend of control diesel emission.In general, diesel oil
Machine after-treatment device mainly includes DOC（Diesel oxidation catalyst）、DPF（Diesel particulate trap）And SCR（Selectivity is urged
Change reductor）.
DOC is the noble metal-coating catalyst on honeycomb ceramic carrier（Such as Pt）, its purpose is to reduce diesel engine
The chemical reaction activation energy of HC, CO and SOF in tail gas, enable these materials to enter at a lower temperature with the oxygen in tail gas
Row oxidation reaction is simultaneously eventually converted into CO2And H2O。
DPF mainly by diffusion, deposition and hits mechanism come the particulate in trap filter diesel exhaust gas.Exhaust stream
During through trap, wherein particulate is trapped in the filter core of filtering bodies, and the exhaust of remaining relatively cleaning is discharged into air.
SCR refers to that using ammonia, ammoniacal liquor, urea or hydro carbons be reducing agent, and NO is higher by oxygen concentrationxTwo orders of magnitude of concentration with
Under conditions of upper, preferentially NOxIt is reduced to N2。
The after-treatment system of state six is typically made up of DOC, DPF and SCR, includes urea injection unit, dpf regeneration unit, urine
Plain feed unit, each temperature sensor and control system.The wherein general TEMP before DOC of after-treatment system temperature sensor
4 temperature sensors compositions of temperature sensor after temperature sensor and SCR before temperature sensor, SCR before device, DPF.It is warm before DOC
It is the temperature input as dpf regeneration control unit to spend temperature sensor before sensor and DPF, and the accuracy of Temperature numerical is direct
Affect the temperature controlled accuracy of dpf regeneration；Temperature sensor is inputted as the temperature of urea injection unit before and after SCR, its
The accuracy of temperature directly influence urea when spray, the size of urea injecting quantity, to NOxDischarge formation is directly affected.And
If artificially distorting delivery temperature to reduce the behavior of urea injecting quantity, then causing the discharge of diesel vehicle, it is impossible to meet method
Rule require.
Therefore, how to monitor whether post-processing temperature signal accurately turns into technical problem urgently to be resolved hurrily.
The content of the invention
It is contemplated that at least solving one of technical problem present in prior art, there is provided a kind of diesel engine after treatment temperature
Spending monitoring method, a kind of supervising device of diesel engine after treatment temperature signal and one kind of signal includes diesel engine after treatment temperature
The diesel engine post-processing system of the supervising device of signal, to solve the problems of the prior art.
As the first aspect of the invention there is provided a kind of monitoring method of diesel engine after treatment temperature signal, wherein, institute
State diesel engine post-processing system including booster, the temperature sensor that is connected with the booster by gas exhaust piping and with institute
State diesel oxidation catalyst, diesel particulate trap and selective catalysis that booster is sequentially connected by gas exhaust piping also
Prototype, the monitoring method of the diesel engine after treatment temperature signal includes：
Gather the Current Temperatures that the temperature sensor is detected；
Calculate the demarcation delivery temperature after the booster；
Calculate the temperature between the Current Temperatures that the demarcation delivery temperature after the booster and the temperature sensor are detected
Difference；
When the temperature gap is in error allowed band, judges that the temperature sensor is working properly, otherwise, send failure
Signal.
Preferably, it is described calculate after the booster demarcation delivery temperature the step of include：
The engine different rotating speeds and different moments of torsion are obtained according to the engine speed of the diesel engine and engine torque
Temperature value is demarcated after corresponding booster；
The demarcation delivery temperature after the booster is obtained to demarcating temperature value progress transient state amendment after the booster.
Preferably, the temperature sensor includes：It is warm before temperature sensor, diesel particulate trap before oxidation catalyzer
Spend sensor, temperature sensor after temperature sensor and SCR device before SCR device；
Temperature sensor is arranged on the porch of the oxidation catalyzer before the oxidation catalyzer, front-seat by oxidation catalyzer
Pipeline is connected with the booster, the Current Temperatures front-seat for detecting the diesel oxidation catalyst；
Temperature sensor is arranged on the porch of the diesel particulate trap before the diesel particulate trap, passes through bavin
Row pipeline is connected with the oxidation catalyzer before oil machine grain catcher, for detecting the diesel particulate trap front row
Current Temperatures；
The SCR device is arranged on the porch of the SCR device, passes through SCR
Row pipeline is connected with the diesel particulate trap before device, the current temperature front-seat for detecting the SCR device
Degree；
Temperature sensor is arranged on the exit of the SCR device after the SCR device, passes through choosing
Selecting property catalysis reductor heel row pipeline is connected with the SCR device, for detecting the SCR device
The Current Temperatures of heel row.
Preferably, the demarcation delivery temperature after the booster include the front-seat demarcation temperature of diesel oxidation catalyst,
The front-seat demarcation temperature of the front-seat demarcation temperature of diesel particulate trap, SCR device and selective catalysis are also
The demarcation temperature of prototype heel row.
Preferably, demarcation temperature-bavin of the front-seat demarcation temperature=booster heel row of the diesel oxidation catalyst
The lost temperature of row pipeline before oil machine oxidation catalyzer；
Demarcation temperature-bavin of the front-seat demarcation temperature=diesel oxidation catalyst heel row of the diesel particulate trap
The lost temperature of row pipeline before oil machine grain catcher；
Demarcation temperature-choosing of the front-seat demarcation temperature=diesel particulate trap heel row of the SCR device
The lost temperature of row pipeline before selecting property catalysis reductor；
The front-seat demarcation temperature-institute of the demarcation temperature of the SCR device heel row=SCR device
State the lost temperature of absorption temperature-SCR device of SCR device.
Preferably, the demarcation temperature of the diesel oxidation catalyst heel row=diesel particulate trap is front-seat
Demarcate the lost temperature of absorption temperature-diesel oxidation catalyst of temperature-diesel oxidation catalyst；
The front-seat demarcation temperature-bavin of the demarcation temperature of diesel particulate trap heel row=SCR device
The lost temperature of the absorption temperature of oil machine grain catcher-diesel particulate trap.
Preferably, the porch of the lost temperature of the diesel oxidation catalyst=diesel oxidation catalyst
Temperature-（The dissipated heat before exhaust gas heat-diesel oxidation catalyst before the diesel oxidation catalyst-described
The interior carrier of diesel oxidation catalyst absorbs heat）/（Described in exhaust specific heat capacity * before the diesel oxidation catalyst
Exhaust mass flow before diesel oxidation catalyst）；
The temperature of the porch of the lost temperature of the diesel particulate trap=diesel particulate trap-（The bavin
Dissipated heat-diesel engine particles before exhaust gas heat-diesel particulate trap before oil machine grain catcher are caught
The interior carrier of storage absorbs heat）/（Diesel engine particles described in exhaust specific heat capacity * before the diesel particulate trap are caught
Exhaust mass flow before storage）；
The temperature of the porch of the lost temperature of the SCR device=SCR device-（The choosing
Dissipated heat-selective catalysis before exhaust gas heat-SCR device before selecting property catalysis reductor is also
The interior carrier of prototype absorbs heat）/（Selective catalysis described in exhaust specific heat capacity * before the SCR device is also
Exhaust mass flow before prototype）.
Preferably, before the diesel oxidation catalyst before lost temperature=diesel oxidation catalyst of row pipeline
The temperature of the porch of row pipeline-（The exhaust gas heat of row pipeline-oxidative diesel is urged before the diesel oxidation catalyst
Change the dissipated heat of row pipeline before device）/（Diesel engine described in the exhaust specific heat capacity * of row pipeline before the diesel oxidation catalyst
The exhaust mass flow of row pipeline before oxidation catalyzer）；
Before the diesel particulate trap before the lost temperature of row pipeline=diesel particulate trap row pipeline entrance
The temperature at place-（Row pipeline before the exhaust gas heat of row pipeline-diesel particulate trap before the diesel particulate trap
Dissipated heat）/（Before the diesel particulate trap before diesel particulate trap described in the exhaust specific heat capacity * of row pipeline
The exhaust mass flow of row pipeline）；
Before the SCR device before the lost temperature of the row pipeline=SCR device row pipeline entrance
The temperature at place-（Row pipeline before the exhaust gas heat of row pipeline-SCR device before the SCR device
Dissipated heat）/（Before the SCR device before SCR device described in the exhaust specific heat capacity * of row pipeline
The exhaust mass flow of row pipeline）.
As the second aspect of the invention there is provided a kind of supervising device of diesel engine after treatment temperature signal, wherein, institute
State diesel engine post-processing system including booster, the temperature sensor that is connected with the booster by gas exhaust piping and with institute
State diesel oxidation catalyst, diesel particulate trap and selective catalysis that booster is sequentially connected by gas exhaust piping also
Prototype, the supervising device of the diesel engine after treatment temperature signal includes：
Collecting unit, the collecting unit is used to gather the Current Temperatures that the temperature sensor is detected；
First computing unit, first computing unit is used to calculate the demarcation delivery temperature after the booster；
Second computing unit, second computing unit is used to calculate the demarcation delivery temperature after the booster and the temperature
Temperature gap between the Current Temperatures that sensor is detected；
Processing unit, the processing unit is used for when the temperature gap is in error allowed band, judges that the temperature is passed
Sense device working is normal, otherwise, sends fault-signal.
As the third aspect of the invention, there is provided a kind of diesel engine post-processing system, the diesel engine post-processing system
The temperature sensor that is connected including booster, with the booster by gas exhaust piping and pass through blast pipe with the booster
Diesel oxidation catalyst, diesel particulate trap and SCR device that road is sequentially connected, wherein, the diesel oil
Machine after-treatment system also include previously described diesel engine post-processing system, the collecting unit respectively with the booster, institute
State diesel oxidation catalyst, the diesel particulate trap and SCR device connection.
The monitoring method and supervising device for the diesel engine after treatment temperature signal that the present invention is provided, by temperature sensor
The current temperature data detected is compared with theoretical calculation data, judges whether the work of temperature sensor is normal, can
Learn whether the data that temperature sensor is detected are accurate, so as to monitor whether post processing signal is accurate, it is to avoid recognize
To change the generation that sensing station carries out the behavior of discharge cheating.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute a part for specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
The method flow diagram of the monitoring method for the diesel engine after treatment temperature signal that Fig. 1 provides for the present invention.
The logic judgment figure for the temperature sensor that Fig. 2 provides for the present invention.
The temperature deviation value module diagram that Fig. 3 provides for the present invention.
Temperature computation module schematic diagram after the booster that Fig. 4 provides for the present invention.
Fig. 5 calculates schematic diagram for the barrel temperature model that the present invention is provided.
Fig. 6 calculates schematic diagram for the gas exhaust piping temperature model that the present invention is provided.
The supervising device structural representation for the diesel engine after treatment temperature signal that Fig. 7 provides for the present invention.
The structural representation for the after-treatment system that Fig. 8 provides for the present invention.
Wherein, 11, booster；12nd, row pipeline before diesel oxidation catalyst；13rd, booster heel row temperature model；14th, bavin
Oil machine oxidation catalyzer front row temperature model；15th, temperature sensor before diesel oxidation catalyst；16th, diesel oxidation catalyst；
17th, diesel oxidation catalyst heel row temperature model；18th, row pipeline before diesel particulate trap；19th, diesel particulate trap
Front-seat temperature model；20th, temperature sensor before diesel particulate trap；21st, diesel particulate trap；22nd, diesel engine particles
Trap heel row temperature model；23rd, row pipeline before SCR device；24th, the front-seat temperature model of SCR device；
25th, temperature sensor before SCR device；26th, SCR device；27th, temperature after SCR device
Sensor；28th, SCR device heel row temperature model；29th, SCR device heel row pipeline；30th, engine control
Unit processed；31st, engine ignition signal；32nd, battery.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
It should be noted that diesel oxidation catalyst（Diesel Oxidation Catalytic, abbreviation DOC）, bavin
Oil machine grain catcher（Diesel Particulate Filter, abbreviation DPF）, SCR device（Selective
Catalytic Reduction, abbreviation SCR）.
As the first aspect of the invention there is provided a kind of monitoring method of diesel engine after treatment temperature signal, wherein, institute
State diesel engine post-processing system including booster, the temperature sensor that is connected with the booster by gas exhaust piping and with institute
State diesel oxidation catalyst, diesel particulate trap and selective catalysis that booster is sequentially connected by gas exhaust piping also
Prototype, as shown in figure 1, the monitoring method of the diesel engine after treatment temperature signal includes：
The Current Temperatures that S110, the collection temperature sensor are detected；
Specifically, it is to judge that diesel oxidation catalyst, diesel particulate trap and SCR device work
It is no normal, it is necessary to gather the Current Temperatures that the temperature sensor is detected first.
Demarcation delivery temperature after S120, the calculating booster；
Specifically, the demarcation delivery temperature after the booster is subjected to theoretical calculation.
S130, calculate Current Temperatures that demarcation delivery temperature and the temperature sensor after the booster detect it
Between temperature gap；
Specifically, the Current Temperatures demarcation delivery temperature after foregoing booster and the temperature sensor detected
It is compared, obtains temperature gap.
S140, when the temperature gap is in error allowed band, judge that the temperature sensor is working properly,
S141, otherwise, sends fault-signal.
Specifically, when said temperature difference is in error allowed band, the working properly of the temperature sensor is judged,
Otherwise, it is determined that the current temperature data that the temperature sensor is detected is insincere.
The monitoring method for the diesel engine after treatment temperature signal that the present invention is provided, passes through working as being detected to temperature sensor
Preceding temperature data is compared with theoretical calculation data, judges whether the work of temperature sensor is normal, can learn that temperature is passed
Whether the data that sensor is detected are accurate, so as to monitor whether post processing signal is accurate, it is to avoid think to change sensing
Device position carries out the generation of the behavior of discharge cheating.
Specifically, first according to row pipeline mould before the temperature MAP data in the engine supercharger exit of demarcation and DOC
Type, can calculate the real time temperature before DOC, be compared with DOC sensor temperature measurement temperatures, then develop DOC temperature
Field model, dpf temperature field model, SCR temperature field model, can obtain temperature before and after temperature before DPF, SCR based on model, pass through
Model calculates temperature and carries out real time contrast with temperature sensor observed temperature, determines whether Current Temperatures measurement value sensor is closing
Within the scope of rationality, so as to ensure that the accuracy of diesel engine post-processing system temperature signal, it can effectively prevent all kinds of artificial
Distort the behavior of sensor temperature.
In order to obtain the demarcation delivery temperature after the booster, it is necessary to be carried out by diesel engine after treatment models for temperature field
Calculate, include as a kind of specifically embodiment, the step of demarcation delivery temperature after the calculating booster：
The engine different rotating speeds and different moments of torsion are obtained according to the engine speed of the diesel engine and engine torque
Temperature value is demarcated after corresponding booster；
The demarcation delivery temperature after the booster is obtained to demarcating temperature value progress transient state amendment after the booster.
Specifically, the temperature sensor includes：It is warm before temperature sensor, diesel particulate trap before oxidation catalyzer
Spend sensor, temperature sensor after temperature sensor and SCR device before SCR device；
Temperature sensor is arranged on the porch of the oxidation catalyzer before the oxidation catalyzer, front-seat by oxidation catalyzer
Pipeline is connected with the booster, the Current Temperatures front-seat for detecting the diesel oxidation catalyst；
Temperature sensor is arranged on the porch of the diesel particulate trap before the diesel particulate trap, passes through bavin
Row pipeline is connected with the oxidation catalyzer before oil machine grain catcher, for detecting the diesel particulate trap front row
Current Temperatures；
The SCR device is arranged on the porch of the SCR device, passes through SCR
Row pipeline is connected with the diesel particulate trap before device, the current temperature front-seat for detecting the SCR device
Degree；
Temperature sensor is arranged on the exit of the SCR device after the SCR device, passes through choosing
Selecting property catalysis reductor heel row pipeline is connected with the SCR device, for detecting the SCR device
The Current Temperatures of heel row.
Demarcation delivery temperature after the booster includes the front-seat demarcation temperature of diesel oxidation catalyst, diesel engine
The front-seat demarcation temperature of grain trap, SCR device front-seat demarcation temperature and SCR device heel row
Demarcation temperature.
It should be noted that with reference to shown in Fig. 2, the monitoring method of the diesel engine after treatment temperature signal provided the present invention
Operation principle illustrate, it is necessary first to whether judge the conditions such as present engine operating mode, delivery temperature and dpf regeneration state
Meet progress temperature sensor rationality diagnostic, if can be with, C.T deviation whether between temperature deviation value lower bound A and
Between temperature deviation value high limit B, if in interval, judging that temperature sensor is working properly, its measured value is rational.If
Temperature deviation value is not within A and B intervals, then then judges that temperature sensor measurement value is incredible, then quotes corresponding temperature
The insincere failure of sensor values is spent, through still suffering from this failure after a period of time, then OBD alarm lamps are lighted.
It should be appreciated that temperature deviation value judges that be mainly reduced temperature sensor measurement signal enters with model calculation value
Judge after row, in order to prevent that contingency deviation is excessive, it is necessary to carry out the filtering process of a period of time to deviation, obtain
The temperature deviation value that can be judged, as shown in Figure 3.
Further specifically, caught to obtain the front-seat demarcation temperature of the diesel oxidation catalyst, diesel engine particles
The front-seat demarcation temperature of storage and the front-seat demarcation temperature of the SCR device, the diesel oxidation catalyst
The lost temperature of row pipeline before demarcation temperature-diesel oxidation catalyst of front-seat demarcation temperature=booster heel row；
Demarcation temperature-bavin of the front-seat demarcation temperature=diesel oxidation catalyst heel row of the diesel particulate trap
The lost temperature of row pipeline before oil machine grain catcher；
Demarcation temperature-choosing of the front-seat demarcation temperature=diesel particulate trap heel row of the SCR device
The lost temperature of row pipeline before selecting property catalysis reductor；
The front-seat demarcation temperature-institute of the demarcation temperature of the SCR device heel row=SCR device
State the lost temperature of absorption temperature-SCR device of SCR device.
Further specifically, the demarcation temperature of the diesel oxidation catalyst heel row=diesel particulate trap
The lost temperature of absorption temperature-diesel oxidation catalyst of front-seat demarcation temperature-diesel oxidation catalyst；
The front-seat demarcation temperature-bavin of the demarcation temperature of diesel particulate trap heel row=SCR device
The lost temperature of the absorption temperature of oil machine grain catcher-diesel particulate trap.
It is understood that it is that can obtain DOC, DPF and SCR to calculate the delivery temperature from each position after booster
Demarcation temperature.Booster heel row temperature is according to engine rotational speed signal, engine torque signal, demarcation different rotating speeds, moment of torsion
Temperature value after corresponding engine supercharger, then the delivery temperature after transient state correction model obtains engine supercharger, such as
Shown in Fig. 4.
Demarcation temperature front-seat DOC demarcates temperature according to booster heel row and subtracts the temperature that row pipeline scatters and disappears to environment before DOC
Degree；
The demarcation temperature of DOC heel row subtracts the temperature that DOC device absorbs and scattered and disappeared to environment according to the front-seat demarcation temperature of DOC；
Demarcation temperature front-seat DPF subtracts the temperature that row pipeline scatters and disappears to environment before DPF according to the demarcation temperature of DOC heel row；
The demarcation temperature of DPF heel row subtracts the temperature that DPF device absorbs and scattered and disappeared to environment according to the front-seat demarcation temperature of DPF；
Demarcation temperature front-seat SCR subtracts the temperature that row pipeline scatters and disappears to environment before SCR according to the demarcation temperature of DPF heel row；
The demarcation temperature of SCR heel row subtracts the temperature that SCR device absorbs and scattered and disappeared to environment according to the front-seat demarcation temperature of SCR.
Further specifically, the lost temperature of the diesel oxidation catalyst=diesel oxidation catalyst enters
Mouthful at temperature-（The dissipated heat before exhaust gas heat-diesel oxidation catalyst before the diesel oxidation catalyst
The interior carrier of amount-diesel oxidation catalyst absorbs heat）/（Exhaust specific heat before the diesel oxidation catalyst
Hold the exhaust mass flow before diesel oxidation catalyst described in *）；
The temperature of the porch of the lost temperature of the diesel particulate trap=diesel particulate trap-（The bavin
Dissipated heat-diesel engine particles before exhaust gas heat-diesel particulate trap before oil machine grain catcher are caught
The interior carrier of storage absorbs heat）/（Diesel engine particles described in exhaust specific heat capacity * before the diesel particulate trap are caught
Exhaust mass flow before storage）；
The temperature of the porch of the lost temperature of the SCR device=SCR device-（The choosing
Dissipated heat-selective catalysis before exhaust gas heat-SCR device before selecting property catalysis reductor is also
The interior carrier of prototype absorbs heat）/（Selective catalysis described in exhaust specific heat capacity * before the SCR device is also
Exhaust mass flow before prototype）.
It should be noted that DOC device absorb and to environment scatter and disappear temperature, DPF device absorb and to environment scatter and disappear
The temperature that temperature and SCR device absorb and scattered and disappeared to environment can be obtained according to the calculating of barrel temperature model, specific cylinder temperature
Spend model as shown in Figure 5.Cylinder（DOC\DPF\SCR）Lost temperature is subtracted to environment dissipated heat and cylinder according to exhaust gas heat
Then divided by exhaust specific heat capacity and exhaust mass flow the heat of internal carrier absorption obtains after-heat in cylinder, obtains cylinder
Body terminal temperature.It is the lost temperature value of cylinder that cylinder head end temperature, which subtracts terminal temperature,（DOC\DPF\SCR）.
Further specifically, lost temperature=oxidative diesel of row pipeline is urged before the diesel oxidation catalyst
Change device before row pipeline porch temperature-（The exhaust gas heat of row pipeline-diesel engine before the diesel oxidation catalyst
The dissipated heat of row pipeline before oxidation catalyzer）/（Before the diesel oxidation catalyst described in the exhaust specific heat capacity * of row pipeline
The exhaust mass flow of row pipeline before diesel oxidation catalyst）；
Before the diesel particulate trap before the lost temperature of row pipeline=diesel particulate trap row pipeline entrance
The temperature at place-（Row pipeline before the exhaust gas heat of row pipeline-diesel particulate trap before the diesel particulate trap
Dissipated heat）/（Before the diesel particulate trap before diesel particulate trap described in the exhaust specific heat capacity * of row pipeline
The exhaust mass flow of row pipeline）；
Before the SCR device before the lost temperature of the row pipeline=SCR device row pipeline entrance
The temperature at place-（Row pipeline before the exhaust gas heat of row pipeline-SCR device before the SCR device
Dissipated heat）/（Before the SCR device before SCR device described in the exhaust specific heat capacity * of row pipeline
The exhaust mass flow of row pipeline）.
It should be noted that the temperature that row pipeline scatters and disappears to environment respectively before row pipeline and SCR before row pipeline, DPF before DOC
Degree can be calculated according to Tail Pipe Temperature model and obtained, and specific gas exhaust piping temperature model is as shown in Figure 6.DOC DPF before SCR
Then divided by row row pipeline temperature of scattering and disappearing subtracts to environment dissipated heat all in accordance with exhaust gas heat and obtains after-heat in blast pipe,
Gas specific heat capacity and exhaust mass flow, obtain gas exhaust piping terminal temperature.Gas exhaust piping head end temperature subtracts terminal temperature and is
Gas exhaust piping scatters and disappears temperature value.
As the second aspect of the invention there is provided a kind of supervising device of diesel engine after treatment temperature signal, wherein, institute
State diesel engine post-processing system including booster, the temperature sensor that is connected with the booster by gas exhaust piping and with institute
State diesel oxidation catalyst, diesel particulate trap and selective catalysis that booster is sequentially connected by gas exhaust piping also
Prototype, as shown in fig. 7, the supervising device 100 of the diesel engine after treatment temperature signal includes：
Collecting unit 110, the collecting unit 110 is used to gather the Current Temperatures that the temperature sensor is detected；
First computing unit 120, first computing unit 120 is used to calculate the demarcation delivery temperature after the booster；
Second computing unit 130, second computing unit 130 is used to calculate the demarcation delivery temperature after the booster and institute
State the temperature gap between the Current Temperatures that temperature sensor is detected；
Processing unit 140, the processing unit 140 is used for when the temperature gap is in error allowed band, judges described
Temperature sensor is working properly, otherwise, sends fault-signal.
The supervising device for the diesel engine after treatment temperature signal that the present invention is provided, passes through working as being detected to temperature sensor
Preceding temperature data is compared with theoretical calculation data, judges whether the work of temperature sensor is normal, can learn that temperature is passed
Whether the data that sensor is detected are accurate, so as to monitor whether post processing signal is accurate, it is to avoid think to change sensing
Device position carries out the generation of the behavior of discharge cheating.
It should be noted that the operation principle on the supervising device of diesel engine after treatment temperature signal is referred to above
The description of the monitoring method of middle diesel engine after treatment temperature signal, here is omitted.
As the third aspect of the invention there is provided a kind of diesel engine post-processing system 10, as shown in figure 8, the diesel oil
Machine after-treatment system 10 include booster 11, the temperature sensor that is connected with the booster 11 by gas exhaust piping and with institute
State diesel oxidation catalyst 16, diesel particulate trap 21 and selectivity that booster 11 is sequentially connected by gas exhaust piping
Reductor 26 is catalyzed, wherein, the diesel engine post-processing system 10 also includes previously described diesel engine post-processing system 100,
The collecting unit respectively with the booster, the diesel oxidation catalyst, the diesel particulate trap and described
SCR device is connected.
The diesel engine post-processing system that the present invention is provided, due to including the prison of diesel engine after treatment temperature signal above
Device is controlled, can realize whether the data detected to temperature sensor are accurately monitored, it is ensured that temperature sensor measurement
Accuracy, it is to avoid think to change the behavior that temperature sensor location carries out discharge cheating, thereby may be ensured that and locate after diesel engine
The normal operation of reason system.In addition, the diesel engine post-processing system that the present invention is provided can be used when temperature sensor fails
Temperature model calculated value is substituted, and can prevent from causing showing for after-treatment system operation irregularity because of temperature sensor fails
As occurring.
As seen from Figure 8, the supervising device of the diesel engine after treatment temperature signal provides power supply supply by battery 32,
And be connected with engine ignition signal 31, worked under the control of control unit of engine 30.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, but the invention is not limited in this.For those skilled in the art, the essence of the present invention is not being departed from
In the case of refreshing and essence, various changes and modifications can be made therein, and these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a kind of monitoring method of diesel engine after treatment temperature signal, it is characterised in that the diesel engine post-processing system includes
Booster, the temperature sensor being connected with the booster by gas exhaust piping and with the booster by gas exhaust piping according to
Diesel oxidation catalyst, diesel particulate trap and the SCR device of secondary connection, the diesel engine after treatment
The monitoring method of temperature signal includes：
Gather the Current Temperatures that the temperature sensor is detected；
Calculate the demarcation delivery temperature after the booster；
Calculate the temperature between the Current Temperatures that the demarcation delivery temperature after the booster and the temperature sensor are detected
Difference；
When the temperature gap is in error allowed band, judges that the temperature sensor is working properly, otherwise, send failure
Signal.
2. the monitoring method of diesel engine after treatment temperature signal according to claim 1, it is characterised in that the calculating institute
The step of stating the demarcation delivery temperature after booster includes：
The engine different rotating speeds and different moments of torsion are obtained according to the engine speed of the diesel engine and engine torque
Temperature value is demarcated after corresponding booster；
The demarcation delivery temperature after the booster is obtained to demarcating temperature value progress transient state amendment after the booster.
3. the monitoring method of diesel engine after treatment temperature signal according to claim 2, it is characterised in that the temperature is passed
Sensor includes：Temperature sensor, SCR device before temperature sensor, diesel particulate trap before oxidation catalyzer
Temperature sensor after preceding temperature sensor and SCR device；
Temperature sensor is arranged on the porch of the oxidation catalyzer before the oxidation catalyzer, front-seat by oxidation catalyzer
Pipeline is connected with the booster, the Current Temperatures front-seat for detecting the diesel oxidation catalyst；
Temperature sensor is arranged on the porch of the diesel particulate trap before the diesel particulate trap, passes through bavin
Row pipeline is connected with the oxidation catalyzer before oil machine grain catcher, for detecting the diesel particulate trap front row
Current Temperatures；
The SCR device is arranged on the porch of the SCR device, passes through SCR
Row pipeline is connected with the diesel particulate trap before device, the current temperature front-seat for detecting the SCR device
Degree；
Temperature sensor is arranged on the exit of the SCR device after the SCR device, passes through choosing
Selecting property catalysis reductor heel row pipeline is connected with the SCR device, for detecting the SCR device
The Current Temperatures of heel row.
4. the monitoring method of diesel engine after treatment temperature signal according to claim 3, it is characterised in that the booster
Demarcation delivery temperature afterwards includes the front-seat demarcation of the front-seat demarcation temperature of diesel oxidation catalyst, diesel particulate trap
The demarcation temperature of the front-seat demarcation temperature of temperature, SCR device and SCR device heel row.
5. the monitoring method of diesel engine after treatment temperature signal according to claim 4, it is characterised in that
Demarcation temperature-oxidative diesel of the front-seat demarcation temperature=booster heel row of the diesel oxidation catalyst is urged
Change the lost temperature of row pipeline before device；
Demarcation temperature-bavin of the front-seat demarcation temperature=diesel oxidation catalyst heel row of the diesel particulate trap
The lost temperature of row pipeline before oil machine grain catcher；
Demarcation temperature-choosing of the front-seat demarcation temperature=diesel particulate trap heel row of the SCR device
The lost temperature of row pipeline before selecting property catalysis reductor；
The front-seat demarcation temperature-institute of the demarcation temperature of the SCR device heel row=SCR device
State the lost temperature of absorption temperature-SCR device of SCR device.
6. the monitoring method of diesel engine after treatment temperature signal according to claim 5, it is characterised in that
The front-seat demarcation temperature-institute of the demarcation temperature of the diesel oxidation catalyst heel row=diesel particulate trap
State the lost temperature of absorption temperature-diesel oxidation catalyst of diesel oxidation catalyst；
The front-seat demarcation temperature-bavin of the demarcation temperature of diesel particulate trap heel row=SCR device
The lost temperature of the absorption temperature of oil machine grain catcher-diesel particulate trap.
7. the monitoring method of diesel engine after treatment temperature signal according to claim 6, it is characterised in that
The temperature of the porch of the lost temperature of the diesel oxidation catalyst=diesel oxidation catalyst-（The bavin
Dissipated heat-oxidative diesel before exhaust gas heat-diesel oxidation catalyst before oil machine oxidation catalyzer is urged
The interior carrier for changing device absorbs heat）/（Oxidative diesel described in exhaust specific heat capacity * before the diesel oxidation catalyst is urged
Change the exhaust mass flow before device）；
The temperature of the porch of the lost temperature of the diesel particulate trap=diesel particulate trap-（The bavin
Dissipated heat-diesel engine particles before exhaust gas heat-diesel particulate trap before oil machine grain catcher are caught
The interior carrier of storage absorbs heat）/（Diesel engine particles described in exhaust specific heat capacity * before the diesel particulate trap are caught
Exhaust mass flow before storage）；
The temperature of the porch of the lost temperature of the SCR device=SCR device-（The choosing
Dissipated heat-selective catalysis before exhaust gas heat-SCR device before selecting property catalysis reductor is also
The interior carrier of prototype absorbs heat）/（Selective catalysis described in exhaust specific heat capacity * before the SCR device is also
Exhaust mass flow before prototype）.
8. the monitoring method of diesel engine after treatment temperature signal according to claim 5, it is characterised in that
Before the diesel oxidation catalyst before the lost temperature of row pipeline=diesel oxidation catalyst row pipeline entrance
The temperature at place-（Row pipeline before the exhaust gas heat of row pipeline-diesel oxidation catalyst before the diesel oxidation catalyst
Dissipated heat）/（Before the diesel oxidation catalyst before diesel oxidation catalyst described in the exhaust specific heat capacity * of row pipeline
The exhaust mass flow of row pipeline）；
Before the diesel particulate trap before the lost temperature of row pipeline=diesel particulate trap row pipeline entrance
The temperature at place-（Row pipeline before the exhaust gas heat of row pipeline-diesel particulate trap before the diesel particulate trap
Dissipated heat）/（Before the diesel particulate trap before diesel particulate trap described in the exhaust specific heat capacity * of row pipeline
The exhaust mass flow of row pipeline）；
Before the SCR device before the lost temperature of the row pipeline=SCR device row pipeline entrance
The temperature at place-（Row pipeline before the exhaust gas heat of row pipeline-SCR device before the SCR device
Dissipated heat）/（Before the SCR device before SCR device described in the exhaust specific heat capacity * of row pipeline
The exhaust mass flow of row pipeline）.
9. a kind of supervising device of diesel engine after treatment temperature signal, it is characterised in that the diesel engine post-processing system includes
Booster, the temperature sensor being connected with the booster by gas exhaust piping and with the booster by gas exhaust piping according to
Diesel oxidation catalyst, diesel particulate trap and the SCR device of secondary connection, the diesel engine after treatment
The supervising device of temperature signal includes：
Collecting unit, the collecting unit is used to gather the Current Temperatures that the temperature sensor is detected；
First computing unit, first computing unit is used to calculate the demarcation delivery temperature after the booster；
Second computing unit, second computing unit is used to calculate the demarcation delivery temperature after the booster and the temperature
Temperature gap between the Current Temperatures that sensor is detected；
Processing unit, the processing unit is used for when the temperature gap is in error allowed band, judges that the temperature is passed
Sense device working is normal, otherwise, sends fault-signal.
10. a kind of diesel engine post-processing system, the diesel engine post-processing system includes booster, passes through row with the booster
Air pipe connection temperature sensor and be sequentially connected with the booster by gas exhaust piping diesel oxidation catalyst,
Diesel particulate trap and SCR device, it is characterised in that the diesel engine post-processing system also includes right
It is required that the diesel engine post-processing system described in 9, the collecting unit respectively with the booster, the diesel oxidation
Device, the diesel particulate trap and SCR device connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710450763.XA CN107091143A (en) | 2017-06-15 | 2017-06-15 | A kind of monitoring method, supervising device and the system of diesel engine after treatment temperature signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710450763.XA CN107091143A (en) | 2017-06-15 | 2017-06-15 | A kind of monitoring method, supervising device and the system of diesel engine after treatment temperature signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107091143A true CN107091143A (en) | 2017-08-25 |
Family
ID=59639476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710450763.XA Pending CN107091143A (en) | 2017-06-15 | 2017-06-15 | A kind of monitoring method, supervising device and the system of diesel engine after treatment temperature signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107091143A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605574A (en) * | 2017-09-21 | 2018-01-19 | 中国汽车技术研究中心 | The on-line automatic warning system of grain catcher failure and control method |
| CN108150263A (en) * | 2017-12-25 | 2018-06-12 | 潍柴动力股份有限公司 | A kind of exhaust temperature sensor misconnection modification method and device |
| CN108763766A (en) * | 2018-05-30 | 2018-11-06 | 无锡威孚力达催化净化器有限责任公司 | Oscillation intensity analysis method for exhaust system |
| CN109098825A (en) * | 2018-09-21 | 2018-12-28 | 南京蔚岚环境技术研究院有限公司 | A kind of six emission purifying system controller of diesel vehicle state and its control method |
| CN109268139A (en) * | 2018-09-29 | 2019-01-25 | 潍柴动力股份有限公司 | A kind of monitoring method and device of engine cracking |
| CN110671178A (en) * | 2019-10-08 | 2020-01-10 | 华东交通大学 | Exhaust temperature sensor diagnosis method based on exhaust temperature characteristics of different torque sections |
| CN111636955A (en) * | 2020-06-08 | 2020-09-08 | 安徽华菱汽车有限公司 | Heavy diesel vehicle and engine aftertreatment anti-cheating method and system thereof |
| CN114076019A (en) * | 2020-08-18 | 2022-02-22 | 卓品智能科技无锡有限公司 | Novel diesel engine exhaust pipe temperature sensor |
| CN114183225A (en) * | 2021-11-23 | 2022-03-15 | 潍柴动力股份有限公司 | Exhaust pipe temperature drop detection method and device |
| CN114961953A (en) * | 2022-06-14 | 2022-08-30 | 无锡威孚力达催化净化器有限责任公司 | Device for preventing SCR exhaust temperature sensor from cheating and OBD diagnosis method |
| CN115387884A (en) * | 2022-04-14 | 2022-11-25 | 北京工业大学 | Method for rapidly screening high-NOx-emission diesel vehicle roads |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080151964A1 (en) * | 2006-12-20 | 2008-06-26 | Hagen Eric L | System for diagnosing temperature sensor operation in an exhaust gas aftertreatment system |
| CN101341315A (en) * | 2005-12-20 | 2009-01-07 | 斯堪尼亚有限公司 | A method and an arrangement for monitoring the functioning of a sensor or an exhaust gas aftertreatment system |
| CN101910574A (en) * | 2008-02-08 | 2010-12-08 | 博世株式会社 | Rationality diagnosis apparatus and rationality diagnosis method of temperature sensor, and exhaust gas purifier of internal combustion engine |
| US20150135680A1 (en) * | 2013-11-21 | 2015-05-21 | Cummins Inc. | Thermal management for regenerating an aftertreatment device |
| CN105628257A (en) * | 2015-12-18 | 2016-06-01 | 潍柴动力股份有限公司 | Method and device for detecting failure of exhaust temperature sensor |
-
2017
- 2017-06-15 CN CN201710450763.XA patent/CN107091143A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101341315A (en) * | 2005-12-20 | 2009-01-07 | 斯堪尼亚有限公司 | A method and an arrangement for monitoring the functioning of a sensor or an exhaust gas aftertreatment system |
| US20080151964A1 (en) * | 2006-12-20 | 2008-06-26 | Hagen Eric L | System for diagnosing temperature sensor operation in an exhaust gas aftertreatment system |
| CN101910574A (en) * | 2008-02-08 | 2010-12-08 | 博世株式会社 | Rationality diagnosis apparatus and rationality diagnosis method of temperature sensor, and exhaust gas purifier of internal combustion engine |
| US20150135680A1 (en) * | 2013-11-21 | 2015-05-21 | Cummins Inc. | Thermal management for regenerating an aftertreatment device |
| CN105628257A (en) * | 2015-12-18 | 2016-06-01 | 潍柴动力股份有限公司 | Method and device for detecting failure of exhaust temperature sensor |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605574A (en) * | 2017-09-21 | 2018-01-19 | 中国汽车技术研究中心 | The on-line automatic warning system of grain catcher failure and control method |
| CN108150263B (en) * | 2017-12-25 | 2020-06-02 | 潍柴动力股份有限公司 | Misconnection correction method and device for exhaust temperature sensor |
| CN108150263A (en) * | 2017-12-25 | 2018-06-12 | 潍柴动力股份有限公司 | A kind of exhaust temperature sensor misconnection modification method and device |
| CN108763766A (en) * | 2018-05-30 | 2018-11-06 | 无锡威孚力达催化净化器有限责任公司 | Oscillation intensity analysis method for exhaust system |
| CN108763766B (en) * | 2018-05-30 | 2022-04-12 | 无锡威孚力达催化净化器有限责任公司 | Vibration intensity analysis method for exhaust system |
| CN109098825A (en) * | 2018-09-21 | 2018-12-28 | 南京蔚岚环境技术研究院有限公司 | A kind of six emission purifying system controller of diesel vehicle state and its control method |
| CN109268139A (en) * | 2018-09-29 | 2019-01-25 | 潍柴动力股份有限公司 | A kind of monitoring method and device of engine cracking |
| CN110671178B (en) * | 2019-10-08 | 2021-05-14 | 华东交通大学 | Exhaust temperature sensor diagnosis method based on exhaust temperature characteristics of different torque sections |
| CN110671178A (en) * | 2019-10-08 | 2020-01-10 | 华东交通大学 | Exhaust temperature sensor diagnosis method based on exhaust temperature characteristics of different torque sections |
| CN111636955A (en) * | 2020-06-08 | 2020-09-08 | 安徽华菱汽车有限公司 | Heavy diesel vehicle and engine aftertreatment anti-cheating method and system thereof |
| CN111636955B (en) * | 2020-06-08 | 2021-12-21 | 安徽华菱汽车有限公司 | Heavy diesel vehicle and engine aftertreatment anti-cheating method and system thereof |
| CN114076019A (en) * | 2020-08-18 | 2022-02-22 | 卓品智能科技无锡有限公司 | Novel diesel engine exhaust pipe temperature sensor |
| CN114183225A (en) * | 2021-11-23 | 2022-03-15 | 潍柴动力股份有限公司 | Exhaust pipe temperature drop detection method and device |
| CN114183225B (en) * | 2021-11-23 | 2022-10-25 | 潍柴动力股份有限公司 | Exhaust pipe temperature drop detection method and device |
| CN115387884A (en) * | 2022-04-14 | 2022-11-25 | 北京工业大学 | Method for rapidly screening high-NOx-emission diesel vehicle roads |
| CN114961953A (en) * | 2022-06-14 | 2022-08-30 | 无锡威孚力达催化净化器有限责任公司 | Device for preventing SCR exhaust temperature sensor from cheating and OBD diagnosis method |
| CN114961953B (en) * | 2022-06-14 | 2024-04-26 | 无锡威孚力达催化净化器有限责任公司 | Device for preventing SCR exhaust temperature sensor from cheating and OBD diagnosis method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107091143A (en) | A kind of monitoring method, supervising device and the system of diesel engine after treatment temperature signal | |
| CN103362614B (en) | The nitrogen dioxide generation diagnostic of diesel aftertreatment system | |
| US8196390B2 (en) | Procedure and device to monitor an exhaust gas after-treatment system | |
| JP6152180B2 (en) | Method for monitoring a particulate filter | |
| US9194268B2 (en) | Exhaust gas treatment system including an enhanced SCR diagnostic unit | |
| EP2772622B1 (en) | Apparatus, method and system for diagnosing reductant deposits in an exhaust aftertreatment system | |
| US8844267B2 (en) | Method and system for controlling a nitrogen oxide (NOx) conversion efficiency monitor | |
| US9476341B2 (en) | Exhaust treatment system that generates debounce duration for NOx sensor offset | |
| CA3125394A1 (en) | Methods for operation of an emissions aftertreatment system for nox control during regeneration of diesel particulate filter | |
| CN113669143B (en) | Performance detection method, detection device and medium for tail gas aftertreatment system | |
| WO2013165302A1 (en) | Method for detecting sulphur poisoning in an exhaust treatment system | |
| KR101637758B1 (en) | A fault diagnosis method of scr system and an apparatus thereof | |
| KR101251515B1 (en) | Exhaust gas post processing method | |
| CN106661985A (en) | Exhaust Purification System | |
| US9528422B2 (en) | Particulate filter washcoat diagnosis based on exothermic substrate temperature | |
| CN103362621B (en) | The non-methane carbon hydride conversion efficiency diagnosis of diesel aftertreatment system | |
| US20140352278A1 (en) | Method and system for selectively enabling and disabling a diagnostic monitor of a selective-catalytic-reduction device | |
| CN108087071A (en) | To the determination methods of DPF carbon carrying capacity | |
| WO2018136408A1 (en) | Rf sensor based architectures | |
| CN112324546A (en) | Fault detection method and fault detection equipment for engine SOF control system | |
| JP2012036840A (en) | Device for diagnosing abnormality in quality of urea water | |
| CA3125388A1 (en) | Ammonia storage capacity of scr catalyst unit | |
| CN105849376A (en) | Exhaust gas post-processing apparatus and control method therefor | |
| CN106523104A (en) | Regulation of a diesel exhaust after-treatment system via exhaust energy determination | |
| KR20150044810A (en) | Method for desulphating an exhaust gas retreatment system of an internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170825 |