CN115840902A - Method for diagnosing poor-quality fuel adding place - Google Patents
Method for diagnosing poor-quality fuel adding place Download PDFInfo
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- 239000000446 fuel Substances 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000007789 gas Substances 0.000 claims abstract description 44
- 239000002737 fuel gas Substances 0.000 claims abstract 4
- 230000015556 catabolic process Effects 0.000 claims description 68
- 238000006731 degradation reaction Methods 0.000 claims description 68
- 239000000295 fuel oil Substances 0.000 claims description 42
- 230000006866 deterioration Effects 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 21
- 239000002828 fuel tank Substances 0.000 claims description 20
- 101100518501 Mus musculus Spp1 gene Proteins 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 102000004019 NADPH Oxidase 1 Human genes 0.000 claims description 14
- 108090000424 NADPH Oxidase 1 Proteins 0.000 claims description 14
- 102000004180 NADPH Oxidase 2 Human genes 0.000 claims description 14
- 108010082739 NADPH Oxidase 2 Proteins 0.000 claims description 14
- 238000003745 diagnosis Methods 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 9
- 238000005336 cracking Methods 0.000 claims description 7
- 238000011161 development Methods 0.000 claims description 7
- 239000003921 oil Substances 0.000 claims description 2
- 238000002405 diagnostic procedure Methods 0.000 claims 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 239000002912 waste gas Substances 0.000 description 5
- 238000012935 Averaging Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The invention relates to the technical field of automobile engines, and discloses a method for diagnosing an inferior fuel adding place, which comprises a controller, a vehicle-mounted T-BOX and a cloud platform, wherein the controller collects driving state information of a vehicle and sends the driving state information to the vehicle-mounted T-BOX, the vehicle-mounted T-BOX sends the driving state to the cloud platform, and the cloud platform predicts the change of SCR efficiency in real time according to the received driving state information, records parking places and records information of an inferior fuel gas station and a qualified fuel gas station. The method for diagnosing the poor-quality fuel adding place accurately identifies the poor-quality fuel adding place and the qualified fuel adding place, and informs a driver of an identification result, so that the driver is helped to select the qualified gas station to add fuel, and the poor-quality fuel is prevented from being added.
Description
Technical Field
The invention relates to the technical field of automobile engines, in particular to a method for diagnosing an inferior fuel adding place.
Background
With the implementation of the national six-emission regulations, catalytic oxidizer (DOC) + particulate filter (DPF) + selective redox (SCR) aftertreatment systems have been matched in order to reduce NOx and particulate emissions in the engine exhaust.
However, the high sulfur content in fuel oil can cause the high sulfur content in exhaust gas, and further cause catalyst poisoning, especially SCR catalyst poisoning, and SCR conversion efficiency is reduced. SCR conversion efficiency can cause vehicle emission to exceed standards, so that vehicle torsion and speed limit are caused, and vehicle running is influenced.
The sulfur content standard of fuel oil above the fifth stage of China is 10ppm, the sulfur content of a lot of fuel oil in the actual market still can not meet the standard, and the sulfur content in the fuel oil can not meet the standard, so that the torque limit and the speed limit of a vehicle can be caused, and the operation of the vehicle can be influenced. At present, gas stations such as national camp and civil camp exist in the market, a driver cannot confirm whether oil products of the gas stations meet requirements or not when refueling, fault maintenance cost is caused after inferior fuel oil is added, the refueling place of the driver is not fixed, and if a problem occurs when vehicles are refueled due to the inferior fuel oil, the adding place of the inferior fuel oil cannot be confirmed. At present, drivers avoid poor fuel filling stations through repeated tests.
Chinese patent (published: 26.04.2017, publication number: CN 106599020A) discloses a method for presenting vehicle operation information on a GIS, and vehicle refueling information is acquired at an official website of a refueling unit through a position service platform; acquiring vehicle violation information at an official website of a vehicle management department through a position service platform; reporting vehicle running information to a position service platform in real time through a mobile positioning terminal; the position service platform analyzes the vehicle operation information reported by the mobile positioning terminal into vehicle position information and vehicle parking information; the position service platform analyzes the refueling place and the violation place of the vehicle and converts the position information of the vehicle into corresponding longitude and latitude; and the position service platform sends the vehicle refueling information, the vehicle violation information, the vehicle running information and the vehicle parking information to the mobile terminal. The invention can display single parameter or all parameters according to different requirements by uniformly displaying the vehicle refueling information, the vehicle violation information and the vehicle parking information on the same GIS, and can visually display three kinds of vehicle operation information at the same time. However, the method can only confirm the refueling place and cannot distinguish the fuel quality.
Disclosure of Invention
The invention aims to provide a method for diagnosing an inferior fuel adding place, which can accurately identify the inferior fuel adding place and the qualified fuel adding place and inform a driver of an identification result, thereby helping the driver select a qualified filling station to add fuel and avoiding adding inferior fuel.
In order to achieve the purpose, the diagnosis method for the poor-quality fuel adding place comprises a controller, a vehicle-mounted T-BOX and a cloud platform, wherein the controller collects driving state information of a vehicle and sends the driving state information to the vehicle-mounted T-BOX, the vehicle-mounted T-BOX sends the driving state to the cloud platform, and the cloud platform predicts the change of SCR efficiency in real time according to the received driving state information, records the parking place and records information of a poor-quality fuel filling station and a qualified fuel filling station.
Preferably, the cloud platform calculates a degradation coefficient of the SCR according to the received driving state information, where the degradation coefficient is a ratio of current conversion efficiency of the SCR to standard conversion efficiency;
if the vehicle is stopped and refueled, the deterioration coefficient after refueling is increased compared with the deterioration coefficient before refueling, but the deterioration coefficient after refueling is still smaller than the first set value eta 1, eta 1<1, the refueling place is filled with inferior fuel oil, and the refueling station is marked as unqualified;
if the vehicle is stopped and refueled, comparing with the degradation coefficient before refueling, the degradation coefficient after refueling is unchanged, but the degradation coefficient after refueling is still smaller than a second set value eta 2, and eta 1 is less than eta 2<1, the refueling place is filled with inferior fuel oil, and the refueling station is marked as unqualified;
if the vehicle is stopped and refueled, compared with the degradation coefficient before refueling, the cracking coefficient after refueling is reduced, the degradation coefficient is smaller than a third set value eta 3, eta 2 is less than eta 3<1, the refueling place is filled with inferior fuel oil, and the gas station is marked as unqualified;
and if other conditions indicate that the added qualified fuel oil is added, marking the gas station as qualified.
Preferably, η 1 is 0.6 to 0.7, η 2 is 0.7 to 0.8, and η 3 is 0.8 to 0.9.
Preferably, the running state information includes a rotation speed, a torque, NOx, an exhaust gas flow, a SCR front temperature and a fuel tank liquid level signal, when the engine working condition is in a steady state working condition, the steady state working condition duration is greater than a set value T1, and the NOx sensor value is greater than a set value M1, or the rotation speed is greater than a set value M2, or the torque percentage is greater than a set value M3, or the SCR front temperature is greater than a set value M4, the SCR efficiency diagnosis is performed, and the CSR degradation coefficient is calculated:
the method for calculating the NOx mass flow of the original machine comprises the following steps:
M NOX1 ＝0.001587*M fqll *V nox1
M NOX1 mass flow rate of NOx in the original machine, g/h, M fqll Measured by a flow sensor for the exhaust gas mass flow, kg/h, V nox1 The volume flow of the original machine NOx is measured by an NOx sensor, and the ppm is calculated;
the method for calculating the mass flow of the tail gas NOx comprises the following steps:
M NOX2 ＝0.001587*M fqll *V nox2
M NOX2 for actually measuring mass flow of NOx, g/h, M fqll Measured by a flow sensor for the exhaust gas mass flow, kg/h, V nox2 The volume flow of tail-exhausted NOx is measured by an NOx sensor, and the volume flow is ppm;
the standard NOx mass flow is obtained by checking Map according to the rotating speed and the torque percentage, and the Map is obtained by testing when a product is developed;
when the degradation coefficient is 1, it indicates that the current NOX emission control level has not changed from the state of the sixth development, and when the degradation coefficient is 0, it indicates that the current NOX emission control has completely failed.
Preferably, determining that the engine operating condition is in the steady state condition requires the following conditions: and taking parameter values of one or more parameters in the running state information in the previous n seconds of the current working condition point, averaging the parameter values, subtracting the parameter values of each second in the previous n seconds from the average value to obtain n working condition point difference values, wherein if the n working condition point difference values are within a set value range, the current working condition point is a steady working condition, and the parameters comprise rotating speed, vehicle speed and torque percentage.
Preferably, the cloud platform judges the behavior of filling fuel according to a fuel tank liquid level signal uploaded by the vehicle-mounted T-BOX, and if the liquid level of the fuel tank is increased within a preset time, the cloud platform judges that the vehicle is filled with the fuel.
Preferably, the cloud platform judges whether the vehicle is stopped or not according to a time signal and a rotating speed signal uploaded by the vehicle-mounted T-BOX.
Preferably, the vehicle is determined to be powered off when the time signal is missing for more than 5min or the ON gear signal is missing according to the time signal uploaded by the vehicle-mounted T-BOX or the key ON gear signal.
Preferably, the vehicle is judged according to a rotating speed signal uploaded by the vehicle-mounted T-BOX, and if the rotating speed signal is less than 200rpm and exceeds 5min, the vehicle is considered to be stopped and not powered off.
Preferably, the vehicle is considered to be stopped and kept at an idle speed if the rotating speed signal is less than the idle speed +50rpm and the vehicle speed signal is less than 1km/h and exceeds 5min according to the rotating speed signal and the vehicle speed signal uploaded by the vehicle-mounted T-BOX.
Preferably, the cloud platform matches map information according to GPS longitude and GPS latitude uploaded by the vehicle-mounted T-BOX to confirm a specific place.
Compared with the prior art, the invention has the following advantages: the method and the system have the advantages that the change of the parking place and the SCR efficiency is integrated to diagnose the poor fuel adding place, the poor fuel adding place and the qualified fuel adding place are accurately identified, and the identified result can be informed to a driver, so that the driver is helped to select the qualified gas station to add fuel, and the poor fuel is prevented from being added.
Detailed Description
The present invention is further described in detail with reference to specific embodiments, and technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A diagnosis method for an inferior fuel adding place comprises a controller, a vehicle-mounted T-BOX and a cloud platform, wherein the controller collects driving state information of a vehicle, the driving state information comprises rotating speed, torque, NOx, waste gas flow, SCR front temperature and fuel tank liquid level signals, the driving state information is sent to the vehicle-mounted T-BOX, the vehicle-mounted T-BOX sends the driving state to the cloud platform, the cloud platform predicts the change of SCR efficiency in real time according to the received driving state information, and records parking places to record information of an inferior fuel filling station and a qualified fuel filling station.
The cloud platform calculates the degradation coefficient of the SCR according to the received driving state information, wherein the degradation coefficient is the ratio of the current conversion efficiency of the SCR to the standard conversion efficiency;
determining that the engine operating condition is in the steady state requires the following conditions: taking the parameter value of the rotating speed in the running state information in the first 60 seconds of the current working condition point, taking an average value, subtracting the parameter value of each second in the first 60 seconds from the average value to obtain 60 working condition point difference values, if the 60 working condition point difference values are all in the range of the set value, the current working condition point is a steady state working condition, when the working condition of the engine is in the steady state working condition, the duration time of the steady state working condition is longer than a set value T1, and the Nox sensor value is longer than a set value M1, carrying out SCR efficiency diagnosis, and calculating the CSR degradation coefficient:
the method for calculating the NOx mass flow of the original machine comprises the following steps:
M NOX1 ＝0.001587*M fqll *V nox1
M NOX1 mass flow rate of NOx in the original machine, g/h, M fqll Measured by a flow sensor for the exhaust gas mass flow, kg/h, V nox1 The volume flow of the original machine NOx is measured by an NOx sensor, and the volume flow is ppm;
the method for calculating the mass flow of the tail gas NOx comprises the following steps:
M NOX2 ＝0.001587*M fqll *V nox2
M NOX2 for actually measuring mass flow of NOx, g/h, M fqll Measured by flow sensors for exhaust gas mass flow, kg/h, V nox2 For tail NOx volumetric flow, measured by a NOx sensor, ppm;
the standard NOx mass flow is obtained by checking Map according to the rotating speed and the torque percentage, and the Map is obtained by testing when a product is developed;
when the degradation coefficient is 1, it indicates that the current NOX emission control level is not changed when it is in the state of the national six development, and when the degradation coefficient is 0, it indicates that the current NOX emission control has completely failed;
the cloud platform judges the behavior of filling fuel oil according to a fuel tank liquid level signal uploaded by the vehicle-mounted T-BOX, if the liquid level of the fuel tank is increased within preset time, for example, 10% is increased within 60min, the vehicle is judged to be filled with the fuel oil, and the cloud platform carries out map information matching according to GPS longitude and GPS latitude uploaded by the vehicle-mounted T-BOX to confirm a specific place;
in addition, the cloud platform judges whether the vehicle is shut down or not according to the time signal and the rotating speed signal uploaded by the vehicle-mounted T-BOX, judges according to the time signal uploaded by the vehicle-mounted T-BOX or the ON gear signal of the key, and determines that the vehicle is shut down and powered off if the time signal is missing for more than 5min or the ON gear signal is missing;
if the vehicle is stopped and refueled, the deterioration coefficient after refueling is increased compared with the deterioration coefficient before refueling, but the deterioration coefficient after refueling is still smaller than a first set value eta 1, eta 1=0.6, the refueling place is filled with inferior fuel oil, and the refueling station is marked as unqualified;
if the vehicle is stopped and refueled, comparing with the degradation coefficient before refueling, the degradation coefficient after refueling is unchanged, but the degradation coefficient after refueling is still smaller than a second set value eta 2, eta 2=0.7, the refueling place is filled with inferior fuel oil, and the refueling station is marked as unqualified;
if the vehicle is stopped and refueled, compared with the degradation coefficient before refueling, the cracking coefficient after refueling is reduced, and the degradation coefficient is less than a third set value eta 3, eta 3=0.8, then the refueling place is filled with inferior fuel oil, and the gas station is marked as unqualified;
and if other conditions indicate that the added qualified fuel oil is added, marking the gas station as qualified.
Example 2
A diagnosis method for an inferior fuel adding place comprises a controller, a vehicle-mounted T-BOX and a cloud platform, wherein the controller collects driving state information of a vehicle, the driving state information comprises rotating speed, torque, NOx, waste gas flow, SCR front temperature and fuel tank liquid level signals, the driving state information is sent to the vehicle-mounted T-BOX, the vehicle-mounted T-BOX sends the driving state to the cloud platform, the cloud platform predicts the change of SCR efficiency in real time according to the received driving state information, and records parking places to record information of an inferior fuel filling station and a qualified fuel filling station.
The cloud platform calculates the degradation coefficient of the SCR according to the received driving state information, wherein the degradation coefficient is the ratio of the current conversion efficiency of the SCR to the standard conversion efficiency;
determining that the engine operating condition is in the steady state requires the following conditions: taking a parameter value of the vehicle speed in the running state information in the previous 30 seconds of the current working condition point, taking an average value, subtracting the parameter value of each second in the previous 30 seconds from the average value to obtain 30 working condition point difference values, if the 30 working condition point difference values are all in a set value range, the current working condition point is a steady state working condition, when the working condition of the engine is in the steady state working condition, the duration time of the steady state working condition is longer than a set value T1, and the rotating speed is greater than a set value M2, carrying out SCR efficiency diagnosis, and calculating a CSR degradation coefficient:
the method for calculating the NOx mass flow of the original machine comprises the following steps:
M NOX1 ＝0.001587*M fqll *V nox1
M NOX1 mass flow of NOx of the original machine, g/h, M fqll Measured by a flow sensor for the exhaust gas mass flow, kg/h, V nox1 The volume flow of the original machine NOx is measured by an NOx sensor, and the ppm is calculated;
the method for calculating the mass flow of the tail gas NOx comprises the following steps:
M NOX2 ＝0.001587*M fqll *V nox2
M NOX2 for actually measuring mass flow of NOx, g/h, M fqll Measured by flow sensors for exhaust gas mass flow, kg/h, V nox2 The volume flow of tail-exhausted NOx is measured by an NOx sensor, and the volume flow is ppm;
the standard NOx mass flow is obtained by checking Map according to the rotating speed and the torque percentage, and the Map is obtained by testing when a product is developed;
when the degradation coefficient is 1, the current NOx emission control level is not changed when the current NOx emission control level is in a state of the same country development, and when the degradation coefficient is 0, the current NOx emission control is completely failed;
the cloud platform judges the behavior of filling fuel oil according to a fuel tank liquid level signal uploaded by the vehicle-mounted T-BOX, judges that the vehicle is filled with the fuel oil if the liquid level of the fuel tank is increased within preset time, and matches map information according to GPS longitude and GPS latitude uploaded by the vehicle-mounted T-BOX to confirm a specific place;
in addition, the cloud platform judges whether the vehicle is shut down or not according to the time signal and the rotating speed signal uploaded by the vehicle-mounted T-BOX, judges according to the rotating speed signal uploaded by the vehicle-mounted T-BOX, and if the rotating speed signal is less than 200rpm and exceeds 5min, the vehicle is considered to be shut down and not powered off;
if the vehicle is stopped and refueled, the deterioration coefficient after refueling is increased compared with the deterioration coefficient before refueling, but the deterioration coefficient after refueling is still smaller than a first set value eta 1, eta 1=0.7, the refueling place is filled with inferior fuel oil, and the refueling station is marked as unqualified;
if the vehicle is stopped and refueled, and the degradation coefficient after refueling is unchanged compared with the degradation coefficient before refueling, but the degradation coefficient after refueling is still smaller than a second set value eta 2, eta 2=0.8, the refueling place is filled with inferior fuel oil, and the refueling station is marked as unqualified;
if the vehicle is stopped and refueled, compared with the degradation coefficient before refueling, the cracking coefficient after refueling is reduced, and the degradation coefficient is less than a third set value eta 3, eta 3=0.9, then the refueling place is filled with inferior fuel oil, and the gas station is marked as unqualified;
if other conditions indicate that the added fuel is qualified, marking the gas station as qualified.
Example 3
A diagnosis method for an inferior fuel adding place comprises a controller, a vehicle-mounted T-BOX and a cloud platform, wherein the controller collects driving state information of a vehicle, the driving state information comprises rotating speed, torque, NOx, waste gas flow, SCR front temperature and fuel tank liquid level signals, the driving state information is sent to the vehicle-mounted T-BOX, the vehicle-mounted T-BOX sends the driving state to the cloud platform, the cloud platform predicts the change of SCR efficiency in real time according to the received driving state information, and records parking places to record information of an inferior fuel filling station and a qualified fuel filling station.
The cloud platform calculates the degradation coefficient of the SCR according to the received driving state information, wherein the degradation coefficient is the ratio of the current conversion efficiency of the SCR to the standard conversion efficiency;
determining that the engine operating condition is in the steady state requires the following conditions: taking the parameter value of the torque percentage in the running state information in the first 45 seconds of the current working condition point, taking an average value, subtracting the parameter value of the first 45 seconds per second from the average value to obtain 45 working condition point difference values, if the 45 working condition point difference values are all in the range of the set value, the current working condition point is a steady state working condition, when the working condition of the engine is in the steady state working condition, the duration time of the steady state working condition is longer than a set value T1, and the torque percentage is longer than a set value M3, carrying out SCR efficiency diagnosis, and calculating a CSR degradation coefficient:
the method for calculating the NOx mass flow of the original machine comprises the following steps:
M NOX1 ＝0.001587*M fqll *V nox1
M NOX1 mass flow rate of NOx in the original machine, g/h, M fqll Measured by a flow sensor for the exhaust gas mass flow, kg/h, V nox1 The volume flow of the original machine NOx is measured by an NOx sensor, and the ppm is calculated;
the method for calculating the mass flow of the tail gas NOx comprises the following steps:
M NOX2 ＝0.001587*M fqll *V nox2
M NOX2 to measure NOx mass flow, g/h, M fqll Measured by a flow sensor for the exhaust gas mass flow, kg/h, V nox2 The volume flow of tail-exhausted NOx is measured by an NOx sensor, and the volume flow is ppm;
the standard NOx mass flow is obtained by checking Map according to the rotating speed and the torque percentage, and the Map is obtained by testing when a product is developed;
when the degradation coefficient is 1, it indicates that the current NOX emission control level is not changed when it is in the state of the national six development, and when the degradation coefficient is 0, it indicates that the current NOX emission control has completely failed;
the cloud platform judges the behavior of filling fuel oil according to a fuel tank liquid level signal uploaded by the vehicle-mounted T-BOX, judges that the vehicle is filled with the fuel oil if the liquid level of the fuel tank is increased within preset time, and matches map information according to GPS longitude and GPS latitude uploaded by the vehicle-mounted T-BOX to confirm a specific place;
in addition, the cloud platform judges whether the vehicle is stopped or not according to the time signal and the rotating speed signal uploaded by the vehicle-mounted T-BOX, judges according to the rotating speed signal and the vehicle speed signal uploaded by the vehicle-mounted T-BOX, and if the rotating speed signal is less than the idle speed +50rpm and the vehicle speed signal is less than 1km/h and exceeds 5min, the vehicle is considered to be stopped and the idle speed is kept;
if the vehicle is stopped and refueled, the deterioration coefficient after refueling is increased compared with the deterioration coefficient before refueling, but the deterioration coefficient after refueling is still smaller than a first set value eta 1, eta 1=0.65, the refueling place is filled with inferior fuel oil, and the refueling station is marked as unqualified;
if the vehicle is stopped and refueled, and the degradation coefficient after refueling is unchanged compared with the degradation coefficient before refueling, but the degradation coefficient after refueling is still smaller than a second set value eta 2, eta 2=0.75, the refueling place is filled with inferior fuel oil, and the refueling station is marked as unqualified;
if the vehicle is stopped and refueled, compared with the degradation coefficient before refueling, the cracking coefficient after refueling is reduced, and the degradation coefficient is less than a third set value eta 3, eta 3=0.85, then the refueling place is filled with inferior fuel oil, and the gas station is marked as unqualified;
if other conditions indicate that the added fuel is qualified, marking the gas station as qualified.
Example 4
A diagnosis method for an inferior fuel adding place comprises a controller, a vehicle-mounted T-BOX and a cloud platform, wherein the controller collects driving state information of a vehicle, the driving state information comprises rotating speed, torque, NOx, waste gas flow, SCR front temperature and fuel tank liquid level signals, the driving state information is sent to the vehicle-mounted T-BOX, the vehicle-mounted T-BOX sends the driving state to the cloud platform, the cloud platform predicts the change of SCR efficiency in real time according to the received driving state information, and records parking places to record information of an inferior fuel filling station and a qualified fuel filling station.
The cloud platform calculates a degradation coefficient of the SCR according to the received running state information, wherein the degradation coefficient is a ratio of the current conversion efficiency of the SCR to the standard conversion efficiency;
determining that the engine operating condition is in the steady state requires the following conditions: taking the parameter value of the rotating speed in the running state information in the first 60 seconds of the current working condition point, taking an average value, subtracting the parameter value of each second in the first 60 seconds from the average value to obtain 60 working condition point difference values, if the 60 working condition point difference values are all in the range of the set value, the current working condition point is a steady state working condition, when the working condition of the engine is in the steady state working condition, the duration time of the steady state working condition is more than a set value T1, and the SCR front temperature is more than a set value M4, carrying out SCR efficiency diagnosis, and calculating a CSR degradation coefficient:
the method for calculating the NOx mass flow of the original machine comprises the following steps:
M NOX1 ＝0.001587*M fqll *V nox1
M NOX1 mass flow rate of NOx in the original machine, g/h, M fqll Measured by flow sensors for exhaust gas mass flow, kg/h, V nox1 The volume flow of the original machine NOx is measured by an NOx sensor, and the ppm is calculated;
the method for calculating the mass flow of the tail gas NOx comprises the following steps:
M NOX2 ＝0.001587*M fqll *V nox2
M NOX2 to measure NOx mass flow, g/h, M fqll Measured by a flow sensor for the exhaust gas mass flow, kg/h, V nox2 The volume flow of tail-exhausted NOx is measured by an NOx sensor, and the volume flow is ppm;
the standard NOx mass flow is obtained by checking Map according to the rotating speed and the torque percentage, and the Map is obtained by testing when a product is developed;
when the degradation coefficient is 1, it indicates that the current NOX emission control level is not changed when it is in the state of the national six development, and when the degradation coefficient is 0, it indicates that the current NOX emission control has completely failed;
the cloud platform judges the behavior of filling fuel oil according to a fuel tank liquid level signal uploaded by the vehicle-mounted T-BOX, if the liquid level of the fuel tank is increased within preset time, the vehicle is judged to be filled with the fuel oil, and the cloud platform carries out map information matching according to the GPS longitude and the GPS latitude uploaded by the vehicle-mounted T-BOX to confirm a specific place;
in addition, the cloud platform judges whether the vehicle is shut down or not according to the time signal and the rotating speed signal uploaded by the vehicle-mounted T-BOX, judges according to the time signal uploaded by the vehicle-mounted T-BOX or the ON gear signal of the key, and determines that the vehicle is shut down and powered off if the time signal is missing for more than 5min or the ON gear signal is missing;
if the vehicle is stopped and refueled, the deterioration coefficient after refueling is increased compared with the deterioration coefficient before refueling, but the deterioration coefficient after refueling is still smaller than a first set value eta 1, eta 1=0.66, the refueling place is filled with inferior fuel oil, and the refueling station is marked as unqualified;
if the vehicle is stopped and refueled, and the degradation coefficient after refueling is unchanged compared with the degradation coefficient before refueling, but the degradation coefficient after refueling is still smaller than a second set value eta 2, eta 2=0.77, the refueling place is filled with inferior fuel oil, and the refueling station is marked as unqualified;
if the vehicle is stopped and refueled, compared with the degradation coefficient before refueling, the cracking coefficient after refueling is reduced, and the degradation coefficient is less than a third set value eta 3, eta 3=0.88, then the refueling place is filled with inferior fuel oil, and the gas station is marked as unqualified;
and if other conditions indicate that the added qualified fuel oil is added, marking the gas station as qualified.
Example 5
A diagnosis method for an inferior fuel adding place comprises a controller, a vehicle-mounted T-BOX and a cloud platform, wherein the controller collects driving state information of a vehicle, the driving state information comprises rotating speed, torque, NOx, waste gas flow, SCR front temperature and fuel tank liquid level signals, the driving state information is sent to the vehicle-mounted T-BOX, the vehicle-mounted T-BOX sends the driving state to the cloud platform, the cloud platform predicts the change of SCR efficiency in real time according to the received driving state information, and records parking places to record information of an inferior fuel filling station and a qualified fuel filling station.
The cloud platform calculates the degradation coefficient of the SCR according to the received driving state information, wherein the degradation coefficient is the ratio of the current conversion efficiency of the SCR to the standard conversion efficiency;
determining that the engine operating condition is in the steady state requires the following conditions: taking a parameter value of the vehicle speed in the running state information in the first 10 seconds of the current working condition point, averaging, subtracting the parameter value of each second in the first 10 seconds from the average value to obtain 10 working condition point difference values, if the 10 working condition point difference values are all in a set value range, the current working condition point is a steady-state working condition, when the working condition of the engine is in the steady-state working condition, the duration time of the steady-state working condition is greater than a set value T1, the Nox sensor value is greater than a set value M1, the rotating speed is greater than a set value M2, the torque percentage is greater than a set value M3, the SCR front temperature is greater than a set value M4, carrying out SCR efficiency diagnosis, and calculating a CSR degradation coefficient:
the method for calculating the NOx mass flow of the original machine comprises the following steps:
M NOX1 ＝0.001587*M fqll *V nox1
M NOX1 mass flow rate of NOx in the original machine, g/h, M fqll Measured by a flow sensor for the exhaust gas mass flow, kg/h, V nox1 The volume flow of the original machine NOx is measured by an NOx sensor, and the ppm is calculated;
the method for calculating the mass flow of the tail gas NOx comprises the following steps:
M NOX2 ＝0.001587*M fqll *V nox2
M NOX2 for actually measuring mass flow of NOx, g/h, M fqll Measured by a flow sensor for the exhaust gas mass flow, kg/h, V nox2 The volume flow of tail-exhausted NOx is measured by an NOx sensor, and the volume flow is ppm;
the standard NOx mass flow is obtained by checking Map according to the rotating speed and the torque percentage, and the Map is obtained by testing when a product is developed;
when the degradation coefficient is 1, it indicates that the current NOX emission control level is not changed when it is in the state of the national six development, and when the degradation coefficient is 0, it indicates that the current NOX emission control has completely failed;
the cloud platform judges the behavior of filling fuel oil according to a fuel tank liquid level signal uploaded by the vehicle-mounted T-BOX, judges that the vehicle is filled with the fuel oil if the liquid level of the fuel tank is increased within preset time, and matches map information according to GPS longitude and GPS latitude uploaded by the vehicle-mounted T-BOX to confirm a specific place;
in addition, the cloud platform judges whether the vehicle is shut down or not according to a time signal and a rotating speed signal uploaded by the vehicle-mounted T-BOX, judges according to a time signal or a key ON gear signal uploaded by the vehicle-mounted T-BOX, if the time signal is missing for more than 5min or the ON gear signal is missing, the vehicle is considered to be shut down and powered off, judges according to the rotating speed signal uploaded by the vehicle-mounted T-BOX, if the rotating speed signal is less than 200rpm and more than 5min, the vehicle is considered to be shut down and not powered off, judges according to the rotating speed signal and a vehicle speed signal uploaded by the vehicle-mounted T-BOX, and if the rotating speed signal is less than idle speed +50rpm and the vehicle speed signal is less than 1km/h and more than 5min, the vehicle is considered to be shut down and is kept at idle speed;
if the vehicle is stopped and refueled, the deterioration coefficient after refueling is increased compared with the deterioration coefficient before refueling, but the deterioration coefficient after refueling is still smaller than a first set value eta 1, eta =0.65, the refueling place is filled with inferior fuel oil, and the refueling station is marked as unqualified;
if the vehicle is stopped and refueled, and the degradation coefficient after refueling is unchanged compared with the degradation coefficient before refueling, but the degradation coefficient after refueling is still smaller than a second set value eta 2, eta 2=0.75, the refueling place is filled with inferior fuel oil, and the refueling station is marked as unqualified;
if the vehicle is stopped and refueled, the cracking coefficient after refueling is reduced compared with the degradation coefficient before refueling, and the degradation coefficient is smaller than a third set value eta 3, eta 3=0.85, then the refueling place is filled with inferior fuel oil, and the gas station is marked as unqualified;
and if other conditions indicate that the added qualified fuel oil is added, marking the gas station as qualified.
In the above embodiment, the conditions for determining that the engine is in the steady-state operating condition are as follows:
the values of the rotational speed and the torque percentage 9s before are accumulated and averaged. If the following conditions are simultaneously met, the engine is indicated to be in a steady-state working condition.
(| former machine NOx 9 th s -original machine NOx First 9s mean value |≤a)
(| rotational speed) 9 th s -rotational speed First 9s mean value |≤b)
(| percent torque) 9 th s Percent Torque First 9s mean value |<c)
(| SCR front temperature 9 th s -SCFront temperature of R First 9s average value |≤d)
a. And b, c and d are all threshold values preset by each parameter.
In addition, in the above examples, map was obtained by testing during product development, and the following table is referred to:
by counting the places where inferior fuel is added and the places where normal fuel is added, when a customer runs to a certain place, the customer sends the gas station information of the place to the customer for reference.
The method for diagnosing the poor-quality fuel adding place integrates the changes of the parking place and the SCR efficiency to diagnose the poor-quality fuel adding place, accurately identifies the poor-quality fuel adding place and the qualified fuel adding place, and can inform a driver of the identified result, thereby helping the driver select the qualified gas station to add fuel and avoiding adding the poor-quality fuel.
Here, it should be noted that the description of the above technical solutions is exemplary, the present specification may be embodied in different forms, and should not be construed as being limited to the technical solutions set forth herein. Rather, these descriptions are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solution of the present invention is limited only by the scope of the claims.
The disclosure is intended to describe aspects of the specification and claims only as an example and, therefore, should not be limited to the details shown. In the above description, when a detailed description of related known functions or configurations is determined to unnecessarily obscure the focus of the present specification and claims, the detailed description will be omitted.
Where the terms "comprising", "having" and "including" are used in this specification, there may be another part or parts unless otherwise stated, and the terms used may generally be singular but may also refer to the plural.
Finally, it should be noted that the above is a detailed description of the invention, and the embodiments of the invention are not limited to the description, and those skilled in the art should be considered as falling within the protection scope of the present invention without departing from the spirit of the present invention. The above embodiments are merely representative examples of the present invention. It is obvious that the invention is not limited to the above-described embodiments, but that many variations are possible. Any simple modification, equivalent change and modification made to the above embodiments in accordance with the technical spirit of the present invention should be considered to be within the scope of the present invention.
Meanwhile, it should be noted that the description of the above technical solutions is exemplary, the present specification may be embodied in different forms, and should not be construed as being limited to the technical solutions set forth herein. Rather, these descriptions are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solution of the present invention is limited only by the scope of the claims. The features of the various embodiments of the present invention may be partially or fully combined or spliced with each other and performed in a variety of different configurations as would be well understood by those skilled in the art. Embodiments of the invention may be performed independently of each other or may be performed together in an interdependent relationship.
For those skilled in the art to which the invention relates, several simple deductions or substitutions may be made without departing from the spirit of the invention, and the above-mentioned structures should be considered as belonging to the protection scope of the invention.
Claims (10)
1. A diagnostic method of an inferior fuel adding site is characterized in that: the system comprises a controller, a vehicle-mounted T-BOX and a cloud platform, wherein the controller collects driving state information of a vehicle and sends the driving state information to the vehicle-mounted T-BOX, the vehicle-mounted T-BOX sends the driving state information to the cloud platform, and the cloud platform predicts the change of SCR efficiency in real time according to the received driving state information, records parking places and records information of poor-quality fuel gas stations and qualified fuel gas stations.
2. The method of diagnosing a poor fuel addition site as set forth in claim 1, wherein: the cloud platform calculates a degradation coefficient of the SCR according to the received running state information, wherein the degradation coefficient is a ratio of the current conversion efficiency of the SCR to the standard conversion efficiency;
if the vehicle is stopped and refueled, the deterioration coefficient after refueling is increased compared with the deterioration coefficient before refueling, but the deterioration coefficient after refueling is still smaller than the first set value eta 1, eta 1<1, the refueling place is filled with inferior fuel oil, and the refueling station is marked as unqualified;
if the vehicle is stopped and refueled, comparing with the degradation coefficient before refueling, the degradation coefficient after refueling is unchanged, but the degradation coefficient after refueling is still smaller than a second set value eta 2, and eta 1 is less than eta 2<1, the refueling place is filled with inferior fuel oil, and the refueling station is marked as unqualified;
if the vehicle is stopped and refueled, compared with the degradation coefficient before refueling, the cracking coefficient after refueling is reduced, the degradation coefficient is smaller than a third set value eta 3, eta 2 is less than eta 3<1, the refueling place is filled with inferior fuel oil, and the gas station is marked as unqualified;
if other conditions indicate that the added fuel is qualified, marking the gas station as qualified.
3. The method of diagnosing a poor fuel addition site according to claim 2, wherein: eta 1 is 0.6-0.7, eta 2 is 0.7-0.8, and eta 3 is 0.8-0.9.
4. The method of diagnosing a poor fuel addition site according to claim 2, wherein: the running state information comprises rotating speed, torque, NOx, exhaust gas flow, SCR front temperature and oil tank liquid level signals, when the working condition of the engine is in a steady state working condition, the duration time of the steady state working condition is longer than a set value T1, the Nox sensor value is larger than a set value M1, or the rotating speed is larger than a set value M2, or the torque percentage is larger than a set value M3, or the SCR front temperature is larger than a set value M4, SCR efficiency diagnosis is carried out, and a CSR degradation coefficient is calculated:
the method for calculating the NOx mass flow of the original machine comprises the following steps:
M NOX1 ＝0.001587*M fqll *V nox1
M NOX1 mass flow rate of NOx in the original machine, g/h, M fqll Measured by a flow sensor for the exhaust gas mass flow, kg/h, V nox1 The volume flow of the original machine NOx is measured by an NOx sensor, and the ppm is calculated;
the method for calculating the mass flow of the tail gas NOx comprises the following steps:
M NOX2 ＝0.001587*M fqll *V nox2
M NOX2 for actually measuring mass flow of NOx, g/h, M fqll Measured by a flow sensor for the exhaust gas mass flow, kg/h, V nox2 The volume flow of tail-exhausted NOx is measured by an NOx sensor, and the volume flow is ppm;
the standard NOx mass flow is obtained by checking Map according to the rotating speed and the torque percentage, and the Map is obtained by testing when a product is developed;
when the deterioration coefficient is 1, it indicates that the current NOX emission control level has not changed from the state of the sixth development, and when the deterioration coefficient is 0, it indicates that the current NOX emission control has completely failed.
5. The method of diagnosing a poor fuel addition site according to claim 3, wherein: determining that the engine operating condition is in the steady state requires the following conditions: and taking parameter values of one or more parameters in the running state information in the previous n seconds of the current working condition point, taking an average value, subtracting the parameter values of each second in the previous n seconds from the average value to obtain n working condition point difference values, wherein if the n working condition point difference values are within the range of set values, the current working condition point is a steady working condition, and the parameters comprise the rotating speed, the vehicle speed and the torque percentage.
6. The method of diagnosing a poor fuel addition site according to claim 2, wherein: the cloud platform judges the behavior of filling fuel according to the fuel tank liquid level signal uploaded by the vehicle-mounted T-BOX, and judges that the vehicle is filled with the fuel if the liquid level of the fuel tank is increased within preset time.
7. The method of diagnosing a poor fuel addition site according to claim 2, wherein: the cloud platform judges whether the vehicle is shut down or not according to the time signal and the rotating speed signal uploaded by the vehicle-mounted T-BOX, judges according to the time signal uploaded by the vehicle-mounted T-BOX or the key ON gear signal, and determines that the vehicle is shut down and powered off if the time signal is missing for more than 5min or the ON gear signal is missing.
8. The method of diagnosing a poor fuel addition site according to claim 7, wherein: and judging according to a rotating speed signal uploaded by the vehicle-mounted T-BOX, and if the rotating speed signal is less than 200rpm and exceeds 5min, determining that the vehicle is shut down and is not powered off.
9. The method of diagnosing a poor fuel addition site as set forth in claim 7, wherein: and judging according to the rotating speed signal and the vehicle speed signal uploaded by the vehicle-mounted T-BOX, and if the rotating speed signal is less than the idle speed +50rpm and the vehicle speed signal is less than 1km/h and exceeds 5min, determining that the vehicle stops and keeps the idle speed.
10. The method of diagnosing a poor fuel addition site according to claim 2, wherein: and the cloud platform performs map information matching according to the GPS longitude and the GPS latitude uploaded by the vehicle-mounted T-BOX to confirm a specific place.
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