CN109281739A - A kind of Wiring detection method and detection device - Google Patents
A kind of Wiring detection method and detection device Download PDFInfo
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- CN109281739A CN109281739A CN201811141396.6A CN201811141396A CN109281739A CN 109281739 A CN109281739 A CN 109281739A CN 201811141396 A CN201811141396 A CN 201811141396A CN 109281739 A CN109281739 A CN 109281739A
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- temperature sensor
- temperature
- wiring
- ecu
- stitch
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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
- 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
- F01N9/00—Electrical control of exhaust gas treating 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
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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)
- Combined Controls Of Internal Combustion Engines (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The embodiment of the invention discloses a kind of Wiring detection method and detection devices.The Wiring detection method includes: control engine continuous service preset time under default operating condition；Obtain the temperature value of each temperature sensor measurement；Whether the temperature value of detection measurement meets the temperature relation of the temperature sensor under default operating condition, and when detecting that any temperature value is unsatisfactory for temperature relation, determines that temperature value is unsatisfactory for temperature sensor corresponding to temperature relation and the stitch wiring error of ECU.Wiring detection method provided in an embodiment of the present invention be used for detect after-treatment system at least two temperature sensors and ECU stitch wiring whether mistake, when detecting wiring error, the temperature for determining that temperature sensor measures is insincere, simple, the reliable effect of result with detection method.
Description
Technical field
The present embodiments relate to After-treatment technics technology more particularly to a kind of Wiring detection method and detection devices.
Background technique
With becoming increasingly conspicuous for air pollution problems inherent, the regulation about vehicle exhaust emission standard is increasingly stringenter.It is existing
Exhaust treatment system include diesel oxidation catalyst (DOC), grain catcher (DPF) and selective catalytic reduction (SCR) dress
It sets.
Using four temperature sensors (including temperature before temperature sensor, DPF before DOC in six engine emission technology of state
Temperature sensor after temperature sensor and SCR before sensor, SCR) carry out urea build pressure, injection, the amendment of NOX conversion efficiency,
The control of regeneration etc., ECU receives the voltage value of corresponding temperature sensor by four stitch, using internal conversion at temperature
Value, since the temperature-measurement principle of four temperature sensors is consistent, the stitch recognition principle of ECU is consistent, so if two sensors
Wiring it is exactly the opposite, then the temperature value that ECU is read be it is wrong, lead to problems such as urea not spray, cross spray, spray less, influence to send out
Motivation discharge and dynamic property；If dpf temperature is abnormal, also resulting in dpf regeneration can not be carried out, and DPF is blocked when serious, influences to send out
Motivation discharge and dynamic property.
The prior art is compared by calculating temperature with model to sensor measures temperature, to judge that temperature sensor connects
The problems such as credibility of line leads to diagnosis inaccuracy if model calculates mistake, and wrong report is wrong.
Summary of the invention
The embodiment of the present invention provides a kind of Wiring detection method and detection device, detects after-treatment system at least two to realize
The stitch wiring of a temperature sensor and ECU whether mistake, judge that the temperature of temperature sensor is credible.
In a first aspect, the embodiment of the present invention provides a kind of Wiring detection method, for detecting at least the two of after-treatment system
The stitch wiring of a temperature sensor and electronic control unit ECU, comprising:
Control engine continuous service preset time under default operating condition；
Obtain the temperature value of each temperature sensor measurement；
Whether the temperature value of detection measurement meets the temperature relation of the temperature sensor under the default operating condition, and
When detecting that any temperature value is unsatisfactory for the temperature relation, determine that temperature value is unsatisfactory for corresponding to the temperature relation
The stitch wiring error of the temperature sensor and the ECU.
Second aspect, the embodiment of the present invention also provide a kind of wiring testing device, for detecting after-treatment system at least
The stitch wiring of two temperature sensors and electronic control unit ECU, comprising:
Control module runs preset time under default operating condition for controlling engine；
Module is obtained, for obtaining the temperature value of each temperature sensor measurement；
Whether judgment module, the temperature value for detecting measurement meet the temperature sensor under the default operating condition
Temperature relation, and when detecting that any temperature value is unsatisfactory for the temperature relation, determine that temperature value is unsatisfactory for the temperature
The stitch wiring error of temperature sensor corresponding to degree relationship and the ECU.
The embodiment of the present invention provides a kind of Wiring detection method, for detecting at least two temperature sensing of after-treatment system
The stitch wiring of device and ECU, by controlling engine continuous service preset time, after-treatment system each section under default operating condition
Temperature in some section and specific temperature relation can be presented；Then the temperature value of each temperature sensor measurement is obtained；When
It, can be with temperature value not when detecting that any temperature value is unsatisfactory for the temperature relation of temperature sensor under corresponding default operating condition
Meet temperature sensor corresponding to temperature relation and the stitch wiring error of ECU, determines the temperature that temperature sensor measures at this time
Spend insincere, simple, the reliable effect of result with detection method.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of Wiring detection method provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of wiring testing device provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another wiring testing device provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Fig. 1 show a kind of flow diagram of Wiring detection method provided in an embodiment of the present invention, and the present embodiment can fit
For detecting at least two temperature sensors of after-treatment system and the stitch wiring of electronic control unit ECU, comprising:
Step 110, control engine the continuous service preset time under default operating condition.
Step 120, the temperature value for obtaining each temperature sensor measurement.
Step 130, detection measurement temperature value whether meet the temperature relation of the temperature sensor under default operating condition, and
When detecting that any temperature value is unsatisfactory for temperature relation, determine temperature value be unsatisfactory for temperature sensor corresponding to temperature relation with
The stitch wiring error of ECU.
It is understood that electronic control unit (ECU, Electronic Control Unit), also known as " driving electricity
Brain ", " vehicle-mounted computer " etc. are a kind of signal progress operations, processing, judgement according to the input of each sensor, then output order
The controller for controlling actuator movement, is mounted on engine body.After-treatment system includes multiple temperature sensors, Mei Gewen
Degree sensor is connect with the specific stitch of ECU.When engine is in certain specific operating condition (such as parking regeneration), post-processing
The temperature of system components is maintained at specific range, then the temperature value that each temperature sensor measures meets specific temperature and closes
System, this temperature relation is stored in advance in ECU, when ECU detects that any temperature value is unsatisfactory for temperature relation, determines temperature
Angle value is unsatisfactory for temperature sensor corresponding to temperature relation and the stitch wiring error of ECU.
The technical solution of the present embodiment, for detecting at least two temperature sensors of after-treatment system and the stitch of ECU
Wiring, by controlling engine continuous service preset time under default operating condition, the temperature of after-treatment system each section can be at certain
Simultaneously specific temperature relation is presented in a section；Then the temperature value of each temperature sensor measurement is obtained；When detecting any temperature
When angle value is unsatisfactory for the temperature relation of temperature sensor under corresponding default operating condition, temperature relation can be unsatisfactory for temperature value
The stitch wiring error of corresponding temperature sensor and ECU, the temperature for determining that temperature sensor measures at this time is insincere, has
Detection method is simple, the reliable effect of result.
Based on the above technical solution, optionally, Wiring detection method provided in this embodiment further include:
When user presses wiring detection switch, triggering executes control engine when continuous service is default under presetting operating condition
Between operation.
It is understood that a wiring detection switch can be arranged on vehicle, when user presses wiring detection switch
When, wiring detection switch sends a trigger signal to ECU, such as can be a voltage signal, and ECU controls engine pre-
If continuous service preset time under operating condition, the wiring detection of temperature sensor is executed.
It should be noted that preset condition can also be set by ECU, in vehicle launch automatically into diagnosis, such as
It can be set and enter detection etc., the embodiment of the present invention at interval of when being detected after some special time period, being started for the first time
This is not construed as limiting.
Optionally, in control engine under default operating condition before continuous service preset time, further includes:
Detect each temperature sensor whether failure；
If it is determined that each temperature sensor fault-free, control whole vehicle state is in temperature sensor wiring detecting state.
It is understood that detect temperature sensor wiring whether wrong, it is necessary first to guarantee each temperature sensor without
Failure, i.e. ECU can normally detect the signal of each temperature sensor measurement.Therefore it is held under default operating condition in control engine
Before reforwarding row preset time, can by ECU according to existing diagnostic logic, detect each temperature sensor whether failure, example
Such as detect some temperature sensor exist short circuit, open-circuit fault when, by ECU issue failure remind, notify staff into
Row maintenance, only all temperature sensors just can be carried out wiring and detect when working properly.
Optionally, it is 0 that temperature sensor wiring detecting state, which includes: current throttle aperture,；Speed is 0；Engine speed
For idling and the duration is more than setting value.
It is understood that generally need to carry out temperature sensor wiring detection when vehicle is offline, if wiring error,
Vehicle can break down when running, and influence the discharge and dynamic property of engine.After vehicle launch, ECU is automatically detected currently
Accelerator open degree is 0；Speed is 0；Engine speed indicates that vehicle normally starts for idling and when the duration is more than setting value,
Temperature sensor detecting state can be entered.Wherein, it can be 1min or more that engine speed, which is the duration of idling, specifically
It can select according to the actual situation, the embodiment of the present invention is not construed as limiting this.
Optionally, after-treatment system includes diesel oxidation catalyst DOC, grain catcher DPF, selective catalytic reduction
SCR device, the quantity of temperature sensor are four, including temperature before temperature sensor, SCR before temperature sensor, DPF before DOC
Temperature sensor after sensor and SCR；
Controlling engine continuous service preset time under default operating condition includes:
The throttle valve opening for controlling engine is default aperture；
The revolving speed for controlling engine is preset rotation speed；
Control DPF carries out fuel oil injection and continues preset time.
It is understood that diesel oxidation catalyst (DOC, Diesel Oxidation Catalyst) is mounted in hair
In motivation gas exhaust piping, by oxidation reaction, carbon monoxide in engine exhaust (CO) and hydrocarbon (HC) are converted to
Harmless water (H2And carbon dioxide (CO 0)2) device.Temperature sensor is used to monitor the temperature before DOC before DOC, is used for DOC
Temperature control and credible detection, the conversion of the HC inside DOC is influenced when too high or too low for temperature.
Grain catcher (DPF, Diesel Particulate Filter) is that one kind is mounted on diesel engine emissions system
Ceramic filter in system, it can be captured before Particulate Emission substance enters atmosphere.Temperature sensor is used to before DPF
Temperature before monitoring DPF influences inside DPF when too high or too low for temperature for the temperature control and credible detection of DPF
Particulate matter (PM) trapping and regeneration.
Selective catalytic reduction (SCR, Selective Catalytic Reduction) technology is for exhaust gas from diesel vehicle
That is, under the effect of the catalyst a treatment process of nitrogen oxides (NOx) in discharge sprays into reducing agent ammonia or urea, tail
NOx in gas is reduced into N2And H2O.The forward and backward temperature sensor of SCR is respectively used to the forward and backward temperature of monitoring SCR, for urea
The conversion of pressure, injection and NOx are built, if temperature anomaly, urea injection is influenced, causes NOx emission exceeded or NH3Leakage.
DPF is in filtering, and particulate matter, which is collected in particulate filter, will lead to the raising of diesel exhaust gas back pressure, when exhaust is carried on the back
When pressure reaches 16kPa~20kPa, diesel engine performance starts to deteriorate, it is therefore necessary to regularly remove degranulation, keep particulate filter extensive
Original working condition is arrived again, that is, is regenerated.Wherein parking regeneration is a kind of regenerated mode, is referred in the case where parking, is sent out
Motivation sprays the measures such as fuel oil raising delivery temperature into exhaust pipe by mentioning revolving speed, control throttle valve, and temperature before DPF is allowed to reach
To 600 DEG C or so of regeneration requirements, carbon particle and oxygen carry out high-temperature chemical reaction inside DPF at this time, are regenerated by parking, can
Carbon particle to be effectively reduced.
Illustratively, to Mr. Yu's engine, ECU controls engine and enters parking regeneration mode by idling, at this time control section
Stream valve opening is that 20%, revolving speed is promoted to 1900rpm, and DPF carries out fuel oil injection, and is kept for this stage continue 10min；Regeneration is steady
After fixed, ECU reads the temperature value when the monitoring of first four sensor, and judges whether four temperature values meet following temperature relationship:
T1: 300 DEG C~350 DEG C；T2: 580 DEG C~620 DEG C；T3: 550 DEG C~590 DEG C；T4: 500 DEG C~540 DEG C (T4< T3< T2, T2-T3
30 DEG C of ≈, T3-T4≈50℃).Wherein, T1、T2、T3、T4Before respectively DOC before temperature sensor, DPF before temperature sensor, SCR
The temperature value of temperature sensor measurement after temperature sensor and SCR.To smoothly complete wiring testing process, the oil of ECU control at this time
Door failure, it may be assumed that driver must complete credible diagnosis, can operate vehicle.
Optionally, the Wiring detection method further include:
It is defeated when determining that temperature value is unsatisfactory for the stitch wiring error of temperature sensor corresponding to temperature relation and ECU
Be out of order information.
Continue taking the above example as an example, if obtaining T2The T for 580 DEG C~620 DEG C1It is 580 DEG C~620 DEG C, then shows ECU
The stitch for connecting temperature sensor before temperature sensor and DPF before DOC is reversed, and ECU exports fault message, such as can show
The stitch of temperature sensor is reversed before temperature sensor and DPF before screen display DOC, or shows failure using indicator light etc., mentions
Show that user checks temperature sensor wiring, the embodiment of the present invention is not construed as limiting this.
It is understood that if judging temperature sensor wiring, there is no mistakes, can export trouble-free prompt letter
Breath, and the regenerated mode of parking is exited, user can be with normal operating vehicle.
Optionally, temperature sensor corresponding to temperature relation and the stitch wiring mistake of ECU are unsatisfactory in judgement temperature value
After accidentally, further includes:
The needle of ECU is corrected according to the temperature relation of the temperature value of each temperature sensor measurement and each temperature sensor
The connection relationship of foot and each temperature sensor.
It is understood that when being identified as ECU and temperature sensor wiring error, if driven in certain time or centainly
Circulation is sailed, failure still has, then logic is corrected in ECU triggering, automatically configures stitch, ECU is made to recognize correct sensor temperature
Angle value.Illustratively, when the stitch of temperature sensor is reversed before temperature sensor and DPF before the ECU connection DOC, ECU will be original
Be set as connection DPF before temperature sensor stitch obtain signal identification be DOC before temperature value, will be set as connecting originally
The signal identification that the stitch of temperature sensor obtains before DOC is the preceding temperature value of DPF.
Optionally, the Wiring detection method further include:
The connection relationship of the stitch of revised ECU and each temperature sensor is stored into ECU, and ECU again
Automatically the stitch of revised ECU and the connection relationship of each temperature sensor are read when powering on, carry out the stitch of ECU with it is each
The connection of temperature sensor.
It is stored by the stitch of revised ECU and the connection relationship of each temperature sensor into ECU, it can be in ECU
Automatically correctly configuration is read when powering on again, avoids powering on the stitch for requiring ECU diagnosis every time.
Fig. 2 show a kind of structural schematic diagram of wiring testing device provided in an embodiment of the present invention, the present embodiment provides
Wiring testing device can be used to execute Wiring detection method in above-described embodiment, for detecting after-treatment system at least
The stitch wiring of two temperature sensors 1 and electronic control unit ECU2, comprising: control module 10 exists for controlling engine
Preset time is run under default operating condition；Module 20 is obtained, the temperature value measured for obtaining each temperature sensor 1；Judge mould
Whether block 30, the temperature value for detecting measurement meet the temperature relation of the temperature sensor 1 under default operating condition, and are detecting
When any temperature value is unsatisfactory for temperature relation, determine that temperature value is unsatisfactory for temperature sensor 1 and ECU2 corresponding to temperature relation
Stitch wiring error.
It is understood that electronic control unit (ECU, Electronic Control Unit), also known as " driving electricity
Brain ", " vehicle-mounted computer " etc. are a kind of signal progress operations, processing, judgement according to the input of each sensor, then output order
The controller for controlling actuator movement, is mounted on engine body.Control module 10 obtains module 20 and judgment module 30 all
It can be built into electronic control unit 2.After-treatment system includes multiple temperature sensors, and each temperature sensor and ECU are special
Fixed stitch connection.When engine is in certain specific operating condition (such as parking regeneration), the temperature of after-treatment system each section
Degree is maintained at specific range, then the temperature value that each temperature sensor measures meets specific temperature relation, this temperature is closed
System is stored in advance in ECU, when ECU detects that any temperature value is unsatisfactory for temperature relation, determines that temperature value is unsatisfactory for temperature
The stitch wiring error of temperature sensor corresponding to relationship and ECU.
The technical solution of the present embodiment, for detecting at least two temperature sensors of after-treatment system and the stitch of ECU
Wiring controls engine continuous service preset time, temperature of after-treatment system each section under default operating condition by control module
In some section and specific temperature relation can be presented in degree；Then the temperature of each temperature sensor measurement is obtained by obtaining module
Angle value；The temperature relation for whether meeting the temperature sensor under default operating condition by the temperature value of judgment module detection measurement, when
It, can be with temperature value not when detecting that any temperature value is unsatisfactory for the temperature relation of temperature sensor under corresponding default operating condition
Meet temperature sensor corresponding to temperature relation and the stitch wiring error of ECU, determines the temperature that temperature sensor measures at this time
Spend insincere, simple, the reliable effect of result with detection method.
Based on the above technical solution, Fig. 3 show another wiring testing device provided in an embodiment of the present invention
Structural schematic diagram.Optionally, the wiring testing device further include: wiring detection switch 40, for pressing wiring inspection in user
When surveying switch 40, trigger control module 10 executes the operation of control engine continuous service preset time under default operating condition.
It is understood that a wiring detection switch can be arranged on vehicle, when user presses wiring detection switch
When, wiring detection switch sends a trigger signal to ECU, such as can be a voltage signal, and ECU controls engine pre-
If continuous service preset time under operating condition, the wiring detection of temperature sensor is executed.
It should be noted that preset condition can also be set by ECU, in vehicle launch automatically into diagnosis, such as
It can be set and enter detection etc., the embodiment of the present invention at interval of when being detected after some special time period, being started for the first time
This is not construed as limiting.
Optionally, with continued reference to Fig. 3, the wiring testing device further include: detection module 50 is passed for detecting each temperature
Sensor whether failure；Control module 10 is also used to if it is determined that each temperature sensor fault-free, control whole vehicle state are in temperature
Sensor wire detecting state.
It is understood that detect temperature sensor wiring whether wrong, it is necessary first to guarantee each temperature sensor without
Failure, i.e. ECU can normally detect the signal of each temperature sensor measurement.Therefore it is held under default operating condition in control engine
Before reforwarding row preset time, can by ECU according to existing diagnostic logic, detect each temperature sensor whether failure, example
Such as detect some temperature sensor exist short circuit, open-circuit fault when, by ECU issue failure remind, notify staff into
Row maintenance, only all temperature sensors just can be carried out wiring and detect when working properly.
Optionally, it is 0 that temperature sensor wiring detecting state, which includes: current throttle aperture,；Speed is 0；Engine speed
For idling and the duration is more than setting value.
It is understood that generally need to carry out temperature sensor wiring detection when vehicle is offline, if wiring error,
Vehicle can break down when running, and influence the discharge and dynamic property of engine.After vehicle launch, ECU is automatically detected currently
Accelerator open degree is 0；Speed is 0；Engine speed indicates that vehicle normally starts for idling and when the duration is more than setting value,
Temperature sensor detecting state can be entered.Wherein, it can be 1min or more that engine speed, which is the duration of idling, specifically
It can select according to the actual situation, the embodiment of the present invention is not construed as limiting this.
Optionally, after-treatment system includes diesel oxidation catalyst DOC, grain catcher DPF, selective catalytic reduction
SCR device, the quantity of temperature sensor are four, including temperature before temperature sensor, SCR before temperature sensor, DPF before DOC
Temperature sensor after sensor and SCR；
Controlling engine continuous service preset time under default operating condition includes:
The throttle valve opening for controlling engine is default aperture；
The revolving speed for controlling engine is preset rotation speed；
Control DPF carries out fuel oil injection and continues preset time.
It is understood that diesel oxidation catalyst (DOC, Diesel Oxidation Catalyst) is mounted in hair
In motivation gas exhaust piping, by oxidation reaction, carbon monoxide in engine exhaust (CO) and hydrocarbon (HC) are converted to
Harmless water (H2And carbon dioxide (CO 0)2) device.Temperature sensor is used to monitor the temperature before DOC before DOC, is used for DOC
Temperature control and credible detection, the conversion of the HC inside DOC is influenced when too high or too low for temperature.
Grain catcher (DPF, Diesel Particulate Filter) is that one kind is mounted on diesel engine emissions system
Ceramic filter in system, it can be captured before Particulate Emission substance enters atmosphere.Temperature sensor is used to before DPF
Temperature before monitoring DPF influences inside DPF when too high or too low for temperature for the temperature control and credible detection of DPF
Particulate matter (PM) trapping and regeneration.
Selective catalytic reduction (SCR, Selective Catalytic Reduction) technology is for exhaust gas from diesel vehicle
That is, under the effect of the catalyst a treatment process of nitrogen oxides (NOx) in discharge sprays into reducing agent ammonia or urea, tail
NOx in gas is reduced into N2And H2O.The forward and backward temperature sensor of SCR is respectively used to the forward and backward temperature of monitoring SCR, for urea
The conversion of pressure, injection and NOx are built, if temperature anomaly, urea injection is influenced, causes NOx emission exceeded or NH3Leakage.
DPF is in filtering, and particulate matter, which is collected in particulate filter, will lead to the raising of diesel exhaust gas back pressure, when exhaust is carried on the back
When pressure reaches 16kPa~20kPa, diesel engine performance starts to deteriorate, it is therefore necessary to regularly remove degranulation, keep particulate filter extensive
Original working condition is arrived again, that is, is regenerated.Wherein parking regeneration is a kind of regenerated mode, is referred in the case where parking, is sent out
Motivation sprays the measures such as fuel oil raising delivery temperature into exhaust pipe by mentioning revolving speed, control throttle valve, and temperature before DPF is allowed to reach
To 600 DEG C or so of regeneration requirements, carbon particle and oxygen carry out high-temperature chemical reaction inside DPF at this time, are regenerated by parking, can
Carbon particle to be effectively reduced.
Illustratively, to Mr. Yu's engine, ECU controls engine and enters parking regeneration mode by idling, at this time control section
Stream valve opening is that 20%, revolving speed is promoted to 1900rpm, and DPF carries out fuel oil injection, and is kept for this stage continue 10min；Regeneration is steady
After fixed, ECU reads the temperature value when the monitoring of first four sensor, and judges whether four temperature values meet following temperature relationship
T1: 300 DEG C~350 DEG C；T2: 580 DEG C~620 DEG C；T3: 550 DEG C~590 DEG C；T4: 500 DEG C~540 DEG C (T4< T3< T2, T2-T3
30 DEG C of ≈, T3-T4≈50℃).Wherein, T1、T2、T3、T4Before respectively DOC before temperature sensor, DPF before temperature sensor, SCR
The temperature value of temperature sensor measurement after temperature sensor and SCR.To smoothly complete wiring testing process, the oil of ECU control at this time
Door failure, it may be assumed that driver must complete credible diagnosis, can operate vehicle.
Optionally, with continued reference to Fig. 3, the wiring testing device further include: output module 60, for determining temperature value not
When meeting the stitch wiring error of temperature sensor corresponding to temperature relation and ECU, fault message is exported.
Continue taking the above example as an example, if obtaining T2The T for 580 DEG C~620 DEG C1It is 580 DEG C~620 DEG C, then shows ECU
The stitch for connecting temperature sensor before temperature sensor and DPF before DOC is reversed, and ECU exports fault message, such as can show
The stitch of temperature sensor is reversed before temperature sensor and DPF before screen display DOC, or shows failure using indicator light etc., mentions
Show that user checks temperature sensor wiring, the embodiment of the present invention is not construed as limiting this.
It is understood that if judging temperature sensor wiring, there is no mistakes, can export trouble-free prompt letter
Breath, and parking regeneration mode is exited, user can be with normal operating vehicle.
Optionally, with continued reference to Fig. 3, which further includes correction module 70, for determining temperature value not
When meeting the stitch wiring error of temperature sensor corresponding to temperature relation and ECU, according to each temperature sensor measurement
The temperature relation of temperature value and each temperature sensor corrects the stitch of ECU and the connection relationship of each temperature sensor.
It is understood that when being identified as ECU and temperature sensor wiring error, if driven in certain time or centainly
Circulation is sailed, failure still has, then logic is corrected in ECU triggering, automatically configures stitch, ECU is made to recognize correct sensor temperature
Angle value.Illustratively, when the stitch of temperature sensor is reversed before temperature sensor and DPF before the ECU connection DOC, ECU will be original
Be set as connection DPF before temperature sensor stitch obtain signal identification be DOC before temperature value, will be set as connecting originally
The signal identification that the stitch of temperature sensor obtains before DOC is the preceding temperature value of DPF.
Optionally, with continued reference to Fig. 3, the wiring testing device further include: memory module 80 is used for revised ECU
Stitch and the corresponding relationship of temperature sensor store into ECU, and read revised ECU automatically when ECU is powered on again
Stitch and each temperature sensor connection relationship, carry out the stitch of ECU and the connection of each temperature sensor.
It is stored by the stitch of revised ECU and the connection relationship of each temperature sensor into ECU, it can be in ECU
Automatically correctly configuration is read when powering on again, avoids powering on the stitch for requiring ECU diagnosis every time.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (16)
1. a kind of Wiring detection method, which is characterized in that for detecting at least two temperature sensors and electricity of after-treatment system
The stitch wiring of sub-control unit ECU, comprising:
Control engine continuous service preset time under default operating condition；
Obtain the temperature value of each temperature sensor measurement；
Whether the temperature value of detection measurement meets the temperature relation of the temperature sensor under the default operating condition, and is detecting
When being unsatisfactory for the temperature relation to any temperature value, it is described corresponding to the temperature relation to determine that temperature value is unsatisfactory for
The stitch wiring error of temperature sensor and the ECU.
2. Wiring detection method according to claim 1, which is characterized in that when user presses wiring detection switch, touching
Hair executes the operation of control engine continuous service preset time under default operating condition.
3. Wiring detection method according to claim 1, which is characterized in that in the control engine under default operating condition
Before continuous service preset time, further includes:
Detect each temperature sensor whether failure；
If it is determined that each temperature sensor fault-free, control whole vehicle state is in temperature sensor wiring detecting state.
4. Wiring detection method according to claim 3, which is characterized in that the temperature sensor wiring detecting state packet
It includes:
Current throttle aperture is 0；
Speed is 0；
Engine speed is idling and the duration is more than setting value.
5. Wiring detection method according to claim 1, which is characterized in that the after-treatment system includes that diesel oil oxidation is urged
Change device DOC, grain catcher DPF, selective catalytic reduction SCR device, the quantity of the temperature sensor is four, including
Temperature sensor after temperature sensor and SCR before temperature sensor, SCR before temperature sensor, DPF before DOC；
Control engine continuous service preset time under default operating condition includes:
The throttle valve opening for controlling the engine is default aperture；
The revolving speed for controlling the engine is preset rotation speed；
The DPF is controlled to carry out fuel oil injection and continue preset time.
6. Wiring detection method according to claim 1, which is characterized in that further include:
In the stitch wiring mistake for determining that temperature value is unsatisfactory for the temperature sensor corresponding to the temperature relation with the ECU
It mistakes, exports fault message.
7. Wiring detection method according to claim 1, which is characterized in that be unsatisfactory for the temperature in judgement temperature value and close
After the stitch wiring error of the corresponding temperature sensor of system and the ECU, further includes:
Institute is corrected according to the temperature relation of the temperature value of each temperature sensor measurement and each temperature sensor
State the stitch of ECU and the connection relationship of each temperature sensor.
8. Wiring detection method according to claim 7, which is characterized in that further include:
The connection relationship of the stitch of the revised ECU and each temperature sensor is stored into the ECU, and
Automatically the stitch of the revised ECU and the connection relationship of each temperature sensor are read when the ECU is powered on again,
Carry out the stitch of the ECU and the connection of each temperature sensor.
9. a kind of wiring testing device, which is characterized in that for detecting at least two temperature sensors and electricity of after-treatment system
The stitch wiring of sub-control unit ECU, comprising:
Control module runs preset time under default operating condition for controlling engine；
Module is obtained, for obtaining the temperature value of each temperature sensor measurement；
Whether judgment module, the temperature value for detecting measurement meet the temperature of the temperature sensor under the default operating condition
Relationship, and when detecting that any temperature value is unsatisfactory for the temperature relation, determine that temperature value is unsatisfactory for the temperature and closes
The stitch wiring error of system corresponding temperature sensor and the ECU.
10. wiring testing device according to claim 9, which is characterized in that further include:
Wiring detection switch executes control hair for when user presses the wiring detection switch, triggering the control module
The operation of motivation continuous service preset time under default operating condition.
11. wiring testing device according to claim 9, which is characterized in that further include:
Detection module, for detect each temperature sensor whether failure；
The control module is also used to if it is determined that each temperature sensor fault-free, control whole vehicle state are in temperature sensing
Device wiring detecting state.
12. wiring testing device according to claim 11, which is characterized in that the temperature sensor wiring detecting state
Include:
Current throttle aperture is 0；
Speed is 0；
Engine speed is idling and the duration is more than setting value.
13. wiring testing device according to claim 9, which is characterized in that the after-treatment system includes diesel oil oxidation
Catalyst converter DOC, grain catcher DPF, selective catalytic reduction SCR device, the quantity of the temperature sensor are four, including
Temperature sensor after temperature sensor and SCR before temperature sensor, SCR before temperature sensor, DPF before DOC；
Control engine continuous service preset time under default operating condition includes:
The throttle valve opening for controlling the engine is default aperture；
The revolving speed for controlling the engine is preset rotation speed；
The DPF is controlled to carry out fuel oil injection and continue preset time.
14. wiring testing device according to claim 9, which is characterized in that further include:
Output module, for determine temperature value be unsatisfactory for the temperature sensor corresponding to the temperature relation with it is described
When the stitch wiring error of ECU, fault message is exported.
15. wiring testing device according to claim 9, which is characterized in that further include correction module, for determining temperature
When angle value is unsatisfactory for stitch wiring error of the temperature sensor corresponding to the temperature relation with the ECU, according to each
The temperature relation of the temperature value of a temperature sensor measurement and each temperature sensor corrects the stitch of the ECU
With the connection relationship of each temperature sensor.
16. wiring testing device according to claim 15, which is characterized in that further include:
Memory module, for storing the stitch of the revised ECU and the corresponding relationship of the temperature sensor to described
In ECU, and the stitch and each temperature sensor of the revised ECU is read when the ECU is powered on again automatically
Connection relationship, carry out the stitch of the ECU and the connection of each temperature sensor.
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