CN116146367A - Method for eliminating misjudgment risk of icing of engine exhaust back pressure sensor, electronic equipment and vehicle - Google Patents
Method for eliminating misjudgment risk of icing of engine exhaust back pressure sensor, electronic equipment and vehicle Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
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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
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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
- F01N11/005—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 the temperature or pressure being estimated, e.g. by means of a theoretical model
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
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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 provides a method for eliminating the risk of misjudgment of icing of an engine exhaust back pressure sensor, electronic equipment and a vehicle, which comprise the following steps: step A: after the vehicle is started, acquiring first condition information, and judging whether the exhaust back pressure sensor has a freezing misjudgment risk according to the first condition information; if yes, executing the step B: disabling activation of the function associated with the exhaust back pressure sensor until after the engine of the vehicle is running, performing step C: judging whether the ice is melted or not according to the second condition information; if yes, eliminating the risk of misjudgment of icing; if not, executing the step D: starting a detection function of an exhaust back pressure sensor to obtain an actual measurement value of the exhaust back pressure; according to the working condition of the vehicle, acquiring an exhaust back pressure model value of the vehicle; judging whether the measured exhaust back pressure value is abnormal or not according to the measured exhaust back pressure value and the model value of the exhaust back pressure; if yes, returning to the step C; if not, eliminating the risk of misjudgment of icing. The invention can solve the problem of false alarm of exhaust back pressure faults caused by icing.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a method for eliminating the risk of misjudgment of icing of an engine exhaust back pressure sensor, electronic equipment and a vehicle.
Background
With the rapid development of the automobile and internal combustion engine industries, energy demand and environmental protection problems become the problems faced by the countries in the world today, and therefore, energy conservation and emission reduction have become two major subjects of the development of the internal combustion engine industry. In the aspect of energy conservation, automobile manufacturers at home and abroad improve the combustion work process of the engine through various technologies. Taking a variable-section turbocharger as an example, the response time and the acceleration capability at low rotation speed can be greatly improved by means of the guide vane with the adjustable vortex section, and the supercharging efficiency in all rotation speed ranges is obviously higher than that of the traditional bleed valve type turbocharger, so that the fuel economy in each rotation speed range is further improved.
Although the efficient turbocharging system represented by the variable-section turbocharger can effectively improve the torque response time and improve the fuel economy, the efficient turbocharging system can cause severe change of exhaust back pressure in the dynamic supercharging process, for example, in a Miller cycle engine, the influence of the exhaust back pressure on the calculation of residual exhaust gas and further on the calculation accuracy of charging and torque is greatly enhanced due to the fact that the working condition interval of a large overlap angle is obviously increased. In order to ensure the stability of the engine and meet the increasingly stringent emission regulations, more and more home and abroad host factories begin to introduce an exhaust back pressure sensor on a new generation engine, and a related detection control method for the exhaust back pressure sensor is also indispensable.
In the engineering application of the exhaust back pressure sensor, experiments show that the exhaust back pressure sensor may have the condition that the gas taking pipeline of the exhaust back pressure sensor and the surface of the ceramic circuit are condensed and frozen under certain environmental conditions (such as alpine region). Since the signal performance of the exhaust back pressure sensor during icing is similar to that of the exhaust back pressure sensor during failure, the failure misdiagnosis of the EMS control system may be caused, and the problem needs to be solved.
Disclosure of Invention
The invention aims to provide a method for eliminating the risk of misjudgment of icing of an engine exhaust back pressure sensor, electronic equipment and a vehicle, so as to solve the problem of misjudgment of exhaust back pressure faults caused by icing.
In order to achieve the above purpose, the present invention provides a method for eliminating the risk of misjudgment of icing of an exhaust back pressure sensor of an engine, comprising the following steps: step A: after a vehicle is started, acquiring first condition information of the vehicle, and judging whether an exhaust back pressure sensor of the vehicle engine has a risk of misjudgment of icing according to the first condition information; if yes, executing the step B; and (B) step (B): disabling activation of a function associated with the exhaust back pressure sensor until after the engine of the vehicle is running, performing step C; step C: judging whether the icing of the exhaust back pressure sensor is melted or not according to the acquired second condition information after the vehicle is started; if yes, eliminating the risk of misjudgment of icing, and starting the function related to the exhaust back pressure sensor; if not, executing the step D: step D: starting a detection function of the exhaust back pressure sensor, and using an engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor as an actual exhaust back pressure measurement value; acquiring an exhaust back pressure model value of the vehicle according to the working condition of the vehicle; judging whether the engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor is abnormal or not according to the exhaust back pressure actual measurement value and the exhaust back pressure model value; if yes, returning to the step C; if not, eliminating the risk of false ice judgment, and starting the function related to the exhaust back pressure sensor.
Optionally, the acquiring the first condition information of the vehicle includes: acquiring time counting from the last stopping of an engine of the vehicle to the current starting of the vehicle, and acquiring the ambient temperature or the temperature of engine cooling liquid when the vehicle is started; judging whether the exhaust back pressure sensor of the vehicle engine has a risk of misjudgment of icing according to the first condition information, including: and if the time timing is greater than a first preset threshold value, the ambient temperature is greater than a second preset threshold value or the temperature of the engine coolant is greater than a third preset threshold value, judging that the exhaust back pressure sensor of the vehicle engine has a risk of icing misjudgment.
Optionally, the obtaining the exhaust back pressure model value of the vehicle according to the working condition of the vehicle includes: and acquiring the exhaust back pressure model value according to the exhaust flow of the vehicle, the opening degree of the variable section turbine of the vehicle engine, the effective sectional area of the turbine of the vehicle, the downstream pressure of the turbine of the vehicle, the upstream temperature of the turbine of the vehicle and a preset exhaust back pressure calculation model.
Optionally, the obtaining the exhaust back pressure model value of the vehicle according to the working condition of the vehicle includes: and acquiring the exhaust back pressure model value of the vehicle according to the working condition of the vehicle and the mapping relation between the pre-acquired exhaust back pressure model value and the working condition of the vehicle.
Optionally, the determining, according to the actual exhaust back pressure measurement value and the exhaust back pressure model value, whether the engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor is abnormal includes: taking each preset angle of rotation of the engine crankshaft as a period; for each period, obtaining an average value of the exhaust back pressure actual measurement values in the period; and if the absolute values of the differences between the average value and the exhaust back pressure model value are larger than a fourth preset threshold value in a first continuous preset number of periods, judging that the engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor is abnormal.
Optionally, the determining, according to the actual measurement value of the exhaust back pressure and the exhaust back pressure model value, whether the engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor is abnormal specifically includes:
taking each preset angle of rotation of the engine crankshaft as a period;
for each period, obtaining the maximum value and the minimum value of the exhaust back pressure model value and the maximum value and the minimum value of the exhaust back pressure actual measurement value in the period;
and if the absolute values of the differences between the maximum value of the exhaust back pressure model value and the maximum value of the exhaust back pressure actual measurement value are larger than a fifth preset threshold value and/or the absolute values of the differences between the minimum value of the exhaust back pressure model value and the minimum value of the exhaust back pressure actual measurement value are larger than a sixth preset threshold value within a second continuous preset number of periods, judging that the engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor is abnormal.
Optionally, the determining whether the ice of the exhaust back pressure sensor melts according to the obtained second condition information after the vehicle is started, includes: acquiring the exhaust energy of the vehicle according to the current exhaust flow of the vehicle, the exhaust specific heat capacity coefficient and the engine exhaust temperature of the vehicle; and if the exhaust energy is larger than a seventh preset threshold value, judging that the ice of the exhaust back pressure sensor is melted.
Optionally, continuously acquiring the exhaust energy of the vehicle according to the current exhaust flow of the vehicle, the exhaust specific heat capacity coefficient and the exhaust temperature of the engine of the vehicle, and specifically includes:
continuously obtaining the exhaust energy of the vehicle according to the following formula:
wherein:
E exh exhaust energy for the vehicle;
c p,exh is the specific heat capacity coefficient of exhaust gas;
T exh an engine exhaust temperature for the vehicle;
t is the duration of the vehicle since this start, i.e. the time between when the vehicle starts to calculate the exhaust energy of the vehicle using this formula.
The invention also provides electronic equipment, which comprises a processor and a memory, wherein the memory is stored with a computer program, and when the computer program is executed by the processor, the method for eliminating the icing misjudgment risk of the engine exhaust back pressure sensor is realized.
The invention further provides a vehicle comprising the electronic equipment.
The method for eliminating the risk of misjudgment of icing of the engine exhaust back pressure sensor, the electronic equipment and the vehicle provided by the invention have the following beneficial effects:
the invention provides a method for eliminating the risk of misjudgment of icing of an engine exhaust back pressure sensor, which comprises the following steps: step A: after a vehicle is started, acquiring first condition information of the vehicle, and judging whether an exhaust back pressure sensor of the vehicle engine has a risk of misjudgment of icing according to the first condition information; if yes, executing the step B; and (B) step (B): disabling activation of a function associated with the exhaust back pressure sensor until after the engine of the vehicle is running, performing step C; step C: judging whether the icing of the exhaust back pressure sensor is melted or not according to the acquired second condition information after the vehicle is started; if yes, eliminating the risk of misjudgment of icing, and starting the function related to the exhaust back pressure sensor; if not, executing the step D: step D: starting a detection function of the exhaust back pressure sensor, and using an engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor as an actual exhaust back pressure measurement value; acquiring an exhaust back pressure model value of the vehicle according to the working condition of the vehicle; judging whether the engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor is abnormal or not according to the exhaust back pressure actual measurement value and the exhaust back pressure model value; if yes, returning to the step C; if not, eliminating the risk of false ice judgment, and starting the function related to the exhaust back pressure sensor. According to the invention, the first condition information is acquired and taken as a basis, the condition that the exhaust back pressure sensor possibly has condensation and icing on the air taking pipeline of the exhaust back pressure sensor and the surface of the ceramic circuit under certain environmental conditions (such as alpine regions) is added, the operation of the exhaust back pressure sensor is firstly forbidden under the condition, the icing and thawing judgment is firstly carried out, the exhaust back pressure sensor is started, the detected engine exhaust back pressure value of the vehicle is judged to be abnormal under the condition that icing is not yet thawed by utilizing the actual exhaust back pressure value and the exhaust back pressure model value, and the risk of icing erroneous judgment can be rapidly eliminated after the condition that no abnormality is confirmed. Therefore, false alarm of the exhaust back pressure sensor caused by icing is avoided. The method for eliminating the false icing judgment risk of the engine exhaust back pressure sensor can rapidly identify the condition of condensation icing on the surfaces of the sensor gas taking pipeline and the ceramic circuit, and can effectively prevent the false icing diagnosis of the control system due to the fact that the signal performance of the exhaust back pressure sensor is similar to the performance of the exhaust back pressure sensor when the exhaust back pressure sensor fails.
The electronic equipment provided by the invention is used for realizing the method for eliminating the false alarm risk of the icing of the engine exhaust back pressure sensor, so that the electronic equipment provided by the invention can avoid the false alarm of the exhaust back pressure sensor caused by icing.
Because the vehicle provided by the invention comprises the electronic equipment, the vehicle provided by the invention can avoid the occurrence of false alarm of the exhaust back pressure sensor caused by icing.
Drawings
FIG. 1 is a schematic diagram of a prior art vehicle engine system with an exhaust back pressure sensor;
FIG. 2 is a flow chart of a method for eliminating risk of erroneous icing determination of an exhaust back pressure sensor of an engine according to an embodiment of the present invention;
FIG. 3 is a graph showing the relationship between the measured exhaust back pressure and the crank angle of the engine according to an embodiment of the present invention;
FIG. 4 is a graph showing exhaust back pressure model values versus engine crank angle for an embodiment of the present invention;
fig. 5 is a schematic block diagram of an electronic device according to an embodiment of the invention;
the reference numerals are as follows:
10-an air filter; 20-an air compressor; 30-an intercooler; 40-throttle valve; 50-an engine; 60-an exhaust back pressure sensor; 70-turbine;
1-a variation curve of an actual exhaust back pressure value along with the crank angle of an engine;
2-an average line of actual exhaust back pressure values;
3-a change curve of an exhaust back pressure model value along with the crank angle of the engine;
a 101-processor; 102 a communication interface; 103-memory; 104-a communication bus.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific embodiments thereof in order to make the objects, advantages and features of the invention more apparent. It should be noted that the drawings are in a very simplified form and are not drawn to scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are to show emphasis instead of the various proportions.
It will be understood that when an element or layer is referred to as being "on" or "connected to" another element or layer, it can be directly on, connected to, or comprise the intervening element or layer. In contrast, when an element is referred to as being "directly on" …, "directly connected to" another element or layer, there are no intervening elements or layers involved. Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present invention. Spatially relative terms, such as "under … …," "below," "lower," "above … …," "upper," and the like, may be used herein for convenience of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" … … "," below "and" beneath "would then be oriented" on "other elements or features. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups. As used herein, the term "and/or" includes any and all combinations of the associated listed items.
For ease of understanding, the principle of detecting exhaust back pressure of a vehicle engine will be described.
Referring to fig. 1, fig. 1 is a schematic diagram of a prior art vehicle engine system with an exhaust back pressure sensor. As shown in fig. 1, after the engine of the vehicle is operated, air is introduced into the engine 50 through the air filter 10, the air compressor 20, the intercooler 30, and the throttle valve 40 in this order, and is combusted with a combustion medium such as gasoline in the engine 50 to form exhaust gas and is discharged out of the engine 50, and an exhaust back pressure of the exhaust gas after being discharged out of the engine 50 is detected by the exhaust back pressure sensor 60, and then the exhaust gas is discharged through the turbine 70.
In the engineering application of the exhaust back pressure sensor, experiments show that the exhaust back pressure sensor may have the condition that the gas taking pipeline of the exhaust back pressure sensor and the surface of the ceramic circuit are condensed and frozen under certain environmental conditions (such as alpine region). Since the signal performance of the exhaust back pressure sensor when icing is similar to the performance of the exhaust back pressure sensor when the exhaust back pressure sensor fails, the fault misdiagnosis of the EMS control system can be caused, namely the icing misjudgment of the engine exhaust back pressure sensor occurs. Therefore, the invention aims to provide a method for eliminating the risk of misjudgment of icing of an engine exhaust back pressure sensor, electronic equipment and a vehicle, and the problem of misjudgment of exhaust back pressure caused by icing is avoided.
In order to achieve the above objective, the present invention provides a method for eliminating the risk of erroneous icing determination of an exhaust back pressure sensor of an engine, please refer to fig. 2, which is a flowchart of a method for eliminating the risk of erroneous icing determination of an exhaust back pressure sensor of an engine according to an embodiment of the present invention, as shown in fig. 2, the method for eliminating the risk of erroneous icing determination of an exhaust back pressure sensor of an engine according to the present invention includes the following steps:
step A: after a vehicle is started, acquiring first condition information of the vehicle, and judging whether an exhaust back pressure sensor of the vehicle engine has a risk of misjudgment of icing according to the first condition information;
if yes, executing the step B;
and (B) step (B): disabling activation of a function associated with the exhaust back pressure sensor until after the engine of the vehicle is running, performing step C;
step C: judging whether the icing of the exhaust back pressure sensor is melted or not according to the acquired second condition information after the vehicle is started;
if yes, eliminating the risk of misjudgment of icing, and starting the function related to the exhaust back pressure sensor;
if not, executing the step D:
step D: starting a detection function of the exhaust back pressure sensor, and using an engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor as an actual exhaust back pressure measurement value;
Acquiring an exhaust back pressure model value of the vehicle according to the working condition of the vehicle;
judging whether the engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor is abnormal or not according to the exhaust back pressure actual measurement value and the exhaust back pressure model value;
if yes, returning to the step C;
if not, eliminating the risk of false ice judgment, and starting the function related to the exhaust back pressure sensor.
The functions related to the exhaust back pressure sensor include, but are not limited to, a detection function of the exhaust back pressure sensor itself and a function related to the presence of control logic thereof. According to the invention, the first condition information is acquired and taken as a basis, the condition that the exhaust back pressure sensor possibly has a gas taking pipeline of the exhaust back pressure sensor and the surface of a ceramic circuit is condensed and frozen under certain environmental conditions (such as alpine regions) is added, the operation of the exhaust back pressure sensor is firstly forbidden under the condition, the determination of freezing and thawing is firstly carried out, the exhaust back pressure sensor is started, the measured value of the exhaust back pressure and the model value of the exhaust back pressure are used under the condition that the freezing and thawing are not yet carried out, whether the detected engine exhaust back pressure value of the vehicle is abnormal is judged, and the risk of misjudgment of freezing is also rapidly eliminated after the condition that the abnormality is not confirmed. Therefore, false alarm of the exhaust back pressure sensor caused by icing is avoided, and due to the fact that the signal performance of the exhaust back pressure sensor when icing is similar to the performance of the exhaust back pressure sensor when the exhaust back pressure sensor fails, the error diagnosis of the control system can be effectively prevented.
For the sake of understanding, the function of step D is further described, and the method steps according to the present invention are available, if ice melting can be confirmed, the risk of ice misjudgment can be directly eliminated. However, the ice melting needs to be carried out for a period of time, and the ice is considered to be possibly not influenced by the exhaust back pressure sensor or the exhaust back pressure sensor is restored to be normal in the ice melting process, so that when the ice is judged not to be melted, the detected exhaust back pressure value of the engine of the vehicle is judged to be abnormal according to the actual measurement value of the exhaust back pressure and the exhaust back pressure model value in the step D, and after the fact that no abnormality is confirmed, the exhaust back pressure sensor is not influenced by the ice, and the risk of ice misjudgment is also rapidly eliminated.
It should be noted that, the functions related to the exhaust back pressure sensor include, but are not limited to, continuing to perform diagnostic detection on the exhaust back pressure sensor, because it is possible that the exhaust back pressure sensor does fail due to factors other than icing, and the function of the present invention is mainly to quickly eliminate the risk of erroneous determination of icing.
In an exemplary embodiment, the acquiring the first condition information of the vehicle includes: acquiring time counting from the last stopping of an engine of the vehicle to the current starting of the vehicle, and acquiring the ambient temperature or the temperature of engine cooling liquid when the vehicle is started; judging whether the exhaust back pressure sensor of the vehicle engine has a risk of misjudgment of icing according to the first condition information, including: and if the time timing is greater than a first preset threshold value, the ambient temperature is greater than a second preset threshold value or the temperature of the engine coolant is greater than a third preset threshold value, judging that the exhaust back pressure sensor of the vehicle engine has a risk of icing misjudgment.
The exhaust back pressure sensor is arranged in such a way that the exhaust back pressure sensor can be frozen after the vehicle is flameout and stopped for a certain time in a low-temperature environment, the possibility of the exhaust back pressure sensor being frozen is small under the condition that the vehicle is flameout for a short time, and the possibility of the exhaust back pressure sensor being frozen is also small under the condition that the environment temperature is high.
In an exemplary embodiment, when the time from the last stop to the current start of the engine of the vehicle is 3-4 hours, the temperature of the environment or the temperature of the engine coolant at the current start of the vehicle is about minus 10 degrees celsius, and the exhaust back pressure sensor is tested to have a risk of icing, but the invention is not limited thereto.
Further, the obtaining the exhaust back pressure model value of the vehicle according to the working condition of the vehicle includes: and acquiring the exhaust back pressure model value according to the exhaust flow of the vehicle, the opening degree of the variable section turbine of the vehicle engine, the effective sectional area of the turbine of the vehicle, the downstream pressure of the turbine of the vehicle, the upstream temperature of the turbine of the vehicle and a preset exhaust back pressure calculation model. According to a number of experiments by the inventors, the exhaust gas flow rate of the vehicle, the opening degree of the variable-section turbine of the vehicle engine, the turbine effective sectional area of the vehicle, the turbine downstream pressure of the vehicle, and the turbine upstream temperature of the vehicle are obtained, and the exhaust gas back pressure model value can be obtained by calculation from their physical correlation with exhaust gas back pressure. The exhaust back pressure model value obtained in this way will be a dynamic average and can be used in practice to determine if the exhaust back pressure sensor is abnormal. The judgment method at this time may be: taking each preset angle of rotation of the engine crankshaft as a period; for each period, obtaining an average value of the exhaust back pressure actual measurement values in the period; and if the absolute values of the differences between the average value and the exhaust back pressure model value are larger than a fourth preset threshold value in a first continuous preset number of periods, judging that the engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor is abnormal.
In this manner of determination, in one exemplary embodiment, the exhaust back pressure model value may be calculated using the following equation:
wherein,,
pos vgt is the opening degree of the variable-section turbine;
A vgt is the effective cross-sectional area of the turbine;
p 1 is an exhaust back pressure model value;
p 2 is turbine downstream pressure;
T 1 is the turbine upstream temperature;
ψ trb is a flow coefficient based on pressure ratio.
In addition, the above formula is a formula for determining the exhaust back pressure model value in order to determine that the engine is currently in useThe upper and lower limits of the exhaust back pressure model value under the working condition can be brought into the upper limit of the acquired exhaust flow in the formula
And lower limit->
(which may be determined by the throttle and intake manifold parameters of the engine), the maximum value of the opening degree of the variable-section turbine of the engine +.>
And minimum->
Maximum value of downstream pressure of the variable-section turbine +.>
And minimum->
Maximum value of upstream temperature of the variable-section turbine +.>
And minimum->
And an upper deviation of the exhaust gas flow of the engine from the actual exhaust gas flow +.>
And lower deviation->
Wherein the upper limit of the exhaust gas flow is +.>
Maximum value of opening degree of variable-section turbine of the engine +.>
Maximum value of downstream pressure of the variable-section turbine 
Maximum value of upstream temperature of the variable-section turbine +.>
And an upper deviation of the exhaust gas flow of the engine from the actual exhaust gas flow +.>
After the above formula is brought in, the upper limit of the exhaust back pressure model value of the engine under the current working condition can be obtained>
Lower limit of exhaust gas flow rate model value +.>
Minimum value of opening degree of variable-section turbine of the engine +.>
Minimum value of the downstream pressure of the variable-section turbine +.>
Minimum value of upstream temperature of the variable-section turbine>
And the lower deviation of the exhaust gas flow of the engine from the actual exhaust gas flow +.>
After the engine is brought into the formula, the lower limit of the exhaust back pressure model value of the engine under the current working condition can be obtained>
The upper limit of the exhaust back pressure model value of the engine under the current working condition +.>
And lower limit->
The reasonable range of the exhaust back pressure of the engine under the current working condition is formed. The upper limit of the exhaust back pressure model value can be selected according to the requirement>
And lower limit->
Any of these values is used for comparison with the average value, and it is also possible to evaluate whether the average value is within the upper limit of the exhaust back pressure model value +.>
And lower limit->
And (3) the value range between the two values is used for judging whether the actual exhaust back pressure value is abnormal or not.
Referring specifically to fig. 3, a graph of exhaust back pressure measured versus engine crank angle is provided according to an embodiment of the present invention, as shown in fig. 3, in an exemplary embodiment, the engine crank may be rotated for a period of 180 degrees, so that when the engine crank is rotated for 180 degrees, the engine is generally considered to have completed a combustion working step. For example, for a four-cylinder engine, when the rotation of the engine crankshaft is completed 180 degrees, the steps of sucking air, compressing air, burning gas and discharging exhaust gas are sequentially completed in the four-cylinder engine, and the exhaust back pressure can be effectively detected in the complete process. With continued reference to fig. 3, in an exemplary embodiment, as shown in fig. 3, the actual exhaust back pressure value detected by the exhaust back pressure sensor may be obtained every 0.5 seconds and plotted as a curve 1 of the actual exhaust back pressure value with the crank angle of the engine, and all the actual exhaust back pressure values obtained in one period are averaged to be plotted as an average value line 2 of the actual exhaust back pressure value, where the average value is also a dynamic average value, and the average value is compared with the exhaust back pressure model value, and if the absolute value of the difference between the average value and the exhaust back pressure model value is greater than a fourth preset threshold, it is determined that the engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor is abnormal. It should be understood that other rotation angles may be set as the period, such as an integer multiple of 180 degrees, but not limited thereto.
Alternatively, the method for obtaining the exhaust back pressure model value may further be: and acquiring the exhaust back pressure model value of the vehicle according to the working condition of the vehicle and the mapping relation between the pre-acquired exhaust back pressure model value and the working condition of the vehicle. The method comprises the steps of obtaining an exhaust back pressure experimental record value of the same-vehicle-type vehicle of the vehicle in a previous operation experiment, wherein the operation experiment is carried out at an experimental temperature, and the exhaust back pressure experimental record value under the same working condition corresponding to the exhaust back pressure actual measurement value is used as the exhaust back pressure model value. Referring to fig. 4, a graph of exhaust back pressure model value versus engine crank angle is provided according to an embodiment of the present invention. It should be understood that the operation experiment includes, but is not limited to, experiments performed in a laboratory, and situations such as actual measurement of an upper route, and the experiment temperature should be a temperature at which the exhaust back pressure sensor cannot be frozen, such as a conventional summer room temperature. Therefore, a database of the exhaust back pressure model values can be formed, different exhaust back pressure model values can be corresponding under different working conditions, the exhaust back pressure model values under the same working conditions as the working conditions corresponding to the exhaust back pressure actual measurement values are selected, a curve 3 of the exhaust back pressure model values along with the crank angle of the engine can be drawn, and the curve can represent the curve of the exhaust back pressure values along with the crank angle of the engine under the condition that the exhaust back pressure sensor is not frozen theoretically. As can be taken from fig. 4, the exhaust gas back pressure model value variation curve 3 with the engine crank angle has a maximum value and a minimum value, that is, peaks and valleys in the curve 3, in one cycle of the engine crank rotation. Similarly, a change curve of an actual exhaust back pressure value along with the crank angle of the engine can be drawn, and when the exhaust back pressure sensor is in a non-icing state, the change curve of the actual exhaust back pressure value along with the crank angle of the engine is close to a change curve 3 of an exhaust back pressure model value along with the crank angle of the engine; and when the exhaust back pressure sensor is in an icing state, the peak/trough of the variation curve of the measured exhaust back pressure value along with the crank angle of the engine is obviously weakened due to the fact that the pressure wave is prevented from being transmitted.
Further, the determining, according to the actual exhaust back pressure measurement value and the exhaust back pressure model value, whether the engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor is abnormal specifically includes: taking each preset angle of rotation of the engine crankshaft as a period; for each period, obtaining the maximum value and the minimum value of the exhaust back pressure model value and the maximum value and the minimum value of the exhaust back pressure actual measurement value in the period; and if the absolute values of the differences between the maximum value of the exhaust back pressure model value and the maximum value of the exhaust back pressure actual measurement value are larger than a fifth preset threshold value and/or the absolute values of the differences between the minimum value of the exhaust back pressure model value and the minimum value of the exhaust back pressure actual measurement value are larger than a sixth preset threshold value within a second continuous preset number of periods, judging that the engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor is abnormal. In this case, the engine crankshaft may be rotated every 180 degrees as one cycle, or the engine crankshaft may be rotated at an angle during the period from when the engine exhaust valve is opened to when the engine exhaust valve is closed.
Further, the determining whether the ice of the exhaust back pressure sensor melts according to the obtained second condition information after the vehicle is started, includes: acquiring the exhaust energy of the vehicle according to the current exhaust flow of the vehicle, the exhaust specific heat capacity coefficient and the engine exhaust temperature of the vehicle; and if the exhaust energy is larger than a seventh preset threshold value, judging that the ice of the exhaust back pressure sensor is melted.
Specifically, continuously obtaining the exhaust energy of the vehicle according to the current exhaust flow of the vehicle, the exhaust specific heat capacity coefficient and the exhaust temperature of the engine of the vehicle, specifically including:
continuously obtaining the exhaust energy of the vehicle according to the following formula:
wherein:
E exh exhaust energy for the vehicle;
c p,exh is the specific heat capacity coefficient of exhaust gas;
T exh an engine exhaust temperature for the vehicle;
and t is the duration of the vehicle after the vehicle is started.
The exhaust energy of the vehicle is continuously accumulated after the engine is started, and the heat is released, so that when the exhaust energy of the vehicle is accumulated to a certain degree, the generated heat can melt the ice of the exhaust back pressure sensor. It should be understood that other information may be used as the second condition information, such as scene information that the engine lasts for a preset period of time at a preset temperature, which is not described herein.
In order to achieve the above objective, the present invention further provides an electronic device, please refer to fig. 5, which schematically shows a block structure of the electronic device according to an embodiment of the present invention. As shown in fig. 5, the electronic device includes a processor 101 and a memory 103, where the memory 103 stores a computer program that, when executed by the processor 101, implements the method for eliminating the risk of icing false positives of an engine exhaust back pressure sensor described above. Because the electronic equipment provided by the invention and the method for eliminating the risk of misjudgment of the icing of the engine exhaust back pressure sensor belong to the same conception, the electronic equipment provided by the invention has all the advantages of the method for eliminating the risk of misjudgment of the icing of the engine exhaust back pressure sensor, so that the beneficial effects of the electronic equipment provided by the invention are not repeated one by one.
As shown in fig. 5, the electronic device further comprises a communication interface 102 and a communication bus 104, wherein the processor 101, the communication interface 102, and the memory 103 communicate with each other via the communication bus 104. The communication bus 104 may be a peripheral component interconnect standard (Peripheral Component Interconnect, PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, among others. The communication bus 104 may be classified as an address bus, a data bus, a control bus, or the like. For ease of illustration, the figures are shown with only one bold line, but not with only one bus or one type of bus. The communication interface 102 is used for communication between the electronic device and other devices.
The processor 101 of the present invention may be a central processing unit (Central Processing Unit, CPU), other general purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), off-the-shelf Programmable gate array (FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, and the processor 101 is a control center of the electronic device, and connects various parts of the entire electronic device using various interfaces and lines.
The memory 103 may be used to store the computer program, and the processor 101 may implement various functions of the electronic device by running or executing the computer program stored in the memory 103 and invoking data stored in the memory 103.
The memory 103 may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
To achieve the above object, the present invention also provides a vehicle comprising the electronic device described above. Because the vehicle provided by the invention and the electronic equipment described above belong to the same inventive concept, the vehicle provided by the invention has all the advantages of the electronic equipment described above, so that the beneficial effects of the vehicle provided by the invention are not repeated here.
To achieve the above object, the present invention further provides a readable storage medium storing a computer program, which when executed by a processor, implements the method for eliminating the risk of misjudging icing of an exhaust back pressure sensor of an engine described above. Because the readable storage medium provided by the invention and the method for eliminating the risk of misjudgment of icing of the engine exhaust back pressure sensor belong to the same conception, the readable storage medium provided by the invention has all the advantages of the method for eliminating the risk of misjudgment of icing of the engine exhaust back pressure sensor, and therefore the beneficial effects of the readable storage medium provided by the invention are not repeated here.
The readable storage media of embodiments of the present invention may take the form of any combination of one or more computer-readable media. The readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer hard disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
It should be noted that, in the present description, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different manner from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the system disclosed in the embodiment, the description is relatively simple because of corresponding to the method disclosed in the embodiment, and the relevant points refer to the description of the method section.
It should be further noted that although the present invention has been disclosed in the preferred embodiments, the above embodiments are not intended to limit the present invention. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art without departing from the scope of the technology, or the technology can be modified to be equivalent. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
It should be further understood that the terms "first," "second," "third," and the like in this specification are used merely for distinguishing between various components, elements, steps, etc. in the specification and not for indicating a logical or sequential relationship between the various components, elements, steps, etc., unless otherwise indicated.
It should also be understood that the terminology described herein is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. It must be noted that, as used herein and in the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. For example, reference to "a step" or "an apparatus" means a reference to one or more steps or apparatuses, and may include sub-steps as well as sub-apparatuses. All conjunctions used should be understood in the broadest sense. And, the word "or" should be understood as having the definition of a logical "or" rather than a logical "exclusive or" unless the context clearly indicates the contrary. Further, implementation of embodiments of the present invention may include performing selected tasks manually, automatically, or in combination.
Claims (10)
1. A method for eliminating the risk of false ice determination of an engine exhaust back pressure sensor, comprising the steps of:
step A: after a vehicle is started, acquiring first condition information of the vehicle, and judging whether an exhaust back pressure sensor of the vehicle engine has a risk of misjudgment of icing according to the first condition information;
if yes, executing the step B;
and (B) step (B): disabling activation of a function associated with the exhaust back pressure sensor until after the engine of the vehicle is running, performing step C;
step C: judging whether the icing of the exhaust back pressure sensor is melted or not according to the acquired second condition information after the vehicle is started;
if yes, eliminating the risk of misjudgment of icing, and starting the function related to the exhaust back pressure sensor;
if not, executing the step D:
step D: starting a detection function of the exhaust back pressure sensor, and using an engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor as an actual exhaust back pressure measurement value;
acquiring an exhaust back pressure model value of the vehicle according to the working condition of the vehicle;
judging whether the engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor is abnormal or not according to the exhaust back pressure actual measurement value and the exhaust back pressure model value;
If yes, returning to the step C;
if not, eliminating the risk of false ice judgment, and starting the function related to the exhaust back pressure sensor.
2. The method for eliminating risk of false ice determination of an engine exhaust back pressure sensor of claim 1, wherein said obtaining first condition information of said vehicle comprises:
acquiring time counting from the last stopping of an engine of the vehicle to the current starting of the vehicle, and acquiring the ambient temperature or the temperature of engine cooling liquid when the vehicle is started;
judging whether the exhaust back pressure sensor of the vehicle engine has a risk of misjudgment of icing according to the first condition information, including:
and if the time timing is greater than a first preset threshold value, the ambient temperature is greater than a second preset threshold value or the temperature of the engine coolant is greater than a third preset threshold value, judging that the exhaust back pressure sensor of the vehicle engine has a risk of icing misjudgment.
3. The method for eliminating the risk of false ice determination of an engine exhaust back pressure sensor according to claim 1, wherein the obtaining an exhaust back pressure model value of the vehicle according to the working condition of the vehicle comprises:
And acquiring the exhaust back pressure model value according to the exhaust flow of the vehicle, the opening degree of the variable section turbine of the vehicle engine, the effective sectional area of the turbine of the vehicle, the downstream pressure of the turbine of the vehicle, the upstream temperature of the turbine of the vehicle and a preset exhaust back pressure calculation model.
4. The method for eliminating the risk of false ice determination of an engine exhaust back pressure sensor according to claim 1, wherein the obtaining an exhaust back pressure model value of the vehicle according to the working condition of the vehicle comprises:
and acquiring the exhaust back pressure model value of the vehicle according to the working condition of the vehicle and the mapping relation between the pre-acquired exhaust back pressure model value and the working condition of the vehicle.
5. The method for eliminating the risk of erroneous determination of icing of an engine exhaust back pressure sensor according to claim 3, wherein said determining whether the engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor is abnormal based on the actually measured exhaust back pressure value and the exhaust back pressure model value includes:
taking each preset angle of rotation of the engine crankshaft as a period;
for each period, obtaining an average value of the exhaust back pressure actual measurement values in the period;
And if the absolute values of the differences between the average value and the exhaust back pressure model value are larger than a fourth preset threshold value in a first continuous preset number of periods, judging that the engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor is abnormal.
6. The method for eliminating risk of false ice determination of an exhaust back pressure sensor of an engine according to claim 4, wherein said determining whether the exhaust back pressure value of the engine of the vehicle detected by the exhaust back pressure sensor is abnormal based on the actually measured exhaust back pressure value and the exhaust back pressure model value comprises:
taking each preset angle of rotation of the engine crankshaft as a period;
for each period, obtaining the maximum value and the minimum value of the exhaust back pressure model value and the maximum value and the minimum value of the exhaust back pressure actual measurement value in the period;
and if the absolute values of the differences between the maximum value of the exhaust back pressure model value and the maximum value of the exhaust back pressure actual measurement value are larger than a fifth preset threshold value and/or the absolute values of the differences between the minimum value of the exhaust back pressure model value and the minimum value of the exhaust back pressure actual measurement value are larger than a sixth preset threshold value within a second continuous preset number of periods, judging that the engine exhaust back pressure value of the vehicle detected by the exhaust back pressure sensor is abnormal.
7. The method for eliminating the risk of erroneous determination of icing of an exhaust back pressure sensor of an engine according to claim 1, wherein the determining whether the icing of the exhaust back pressure sensor is melted based on the acquired second condition information after the vehicle is started up, comprises:
acquiring the exhaust energy of the vehicle according to the current exhaust flow of the vehicle, the exhaust specific heat capacity coefficient and the engine exhaust temperature of the vehicle;
and if the exhaust energy is larger than a seventh preset threshold value, judging that the ice of the exhaust back pressure sensor is melted.
8. The method of eliminating the risk of false positive ice formation from an engine exhaust back pressure sensor of claim 7, wherein said obtaining exhaust energy of said vehicle based on said current exhaust flow of said vehicle, an exhaust specific heat capacity coefficient, and an engine exhaust temperature of said vehicle comprises:
the exhaust energy of the vehicle is obtained according to the following formula:
wherein: e (E) exh Exhaust energy for the vehicle;
c p,exh is the specific heat capacity coefficient of exhaust gas;
T exh an engine exhaust temperature for the vehicle;
and t is the duration of the vehicle after the vehicle is started.
9. An electronic device comprising a processor and a memory, the memory having stored thereon a computer program which, when executed by the processor, implements the method of eliminating risk of false positive ice formation from an engine exhaust back pressure sensor of any one of claims 1 to 8.
10. A vehicle comprising the electronic device of claim 9.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469403A (en) * | 2019-09-20 | 2019-11-19 | 东风汽车集团有限公司 | Gasoline engine grain catcher pressure difference pipeline icing delayed diagnosis method |
| CN110487481A (en) * | 2019-09-25 | 2019-11-22 | 潍柴动力股份有限公司 | Venturi meter differential pressure pickup monitoring method and device |
| CN110514354A (en) * | 2019-09-25 | 2019-11-29 | 潍柴动力股份有限公司 | A kind of fault detection method and device of differential pressure pickup |
| CN111164293A (en) * | 2017-10-30 | 2020-05-15 | 洋马株式会社 | Control device for internal combustion engine |
| US20200284181A1 (en) * | 2019-03-05 | 2020-09-10 | Subaru Corporation | Freezing diagnosing device and engine control apparatus |
| DE102019220438A1 (en) * | 2019-12-20 | 2021-06-24 | Volkswagen Aktiengesellschaft | Diagnostic procedure for the detection of errors in an exhaust gas recirculation |
| WO2022087934A1 (en) * | 2020-10-29 | 2022-05-05 | 浙江吉利控股集团有限公司 | Pressure diagnosis control method and apparatus for gpf, and storage medium |
| CN114607533A (en) * | 2022-04-14 | 2022-06-10 | 一汽解放汽车有限公司 | EGR differential pressure sensor icing diagnosis processing method |
| CN115326124A (en) * | 2022-08-30 | 2022-11-11 | 联合汽车电子有限公司 | Method and device for testing exhaust back pressure sensor, storage medium and equipment |
-
2022
- 2022-12-20 CN CN202211642652.6A patent/CN116146367A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111164293A (en) * | 2017-10-30 | 2020-05-15 | 洋马株式会社 | Control device for internal combustion engine |
| US20200284181A1 (en) * | 2019-03-05 | 2020-09-10 | Subaru Corporation | Freezing diagnosing device and engine control apparatus |
| CN110469403A (en) * | 2019-09-20 | 2019-11-19 | 东风汽车集团有限公司 | Gasoline engine grain catcher pressure difference pipeline icing delayed diagnosis method |
| CN110487481A (en) * | 2019-09-25 | 2019-11-22 | 潍柴动力股份有限公司 | Venturi meter differential pressure pickup monitoring method and device |
| CN110514354A (en) * | 2019-09-25 | 2019-11-29 | 潍柴动力股份有限公司 | A kind of fault detection method and device of differential pressure pickup |
| DE102019220438A1 (en) * | 2019-12-20 | 2021-06-24 | Volkswagen Aktiengesellschaft | Diagnostic procedure for the detection of errors in an exhaust gas recirculation |
| WO2022087934A1 (en) * | 2020-10-29 | 2022-05-05 | 浙江吉利控股集团有限公司 | Pressure diagnosis control method and apparatus for gpf, and storage medium |
| CN114607533A (en) * | 2022-04-14 | 2022-06-10 | 一汽解放汽车有限公司 | EGR differential pressure sensor icing diagnosis processing method |
| CN115326124A (en) * | 2022-08-30 | 2022-11-11 | 联合汽车电子有限公司 | Method and device for testing exhaust back pressure sensor, storage medium and equipment |
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