CN111999000B - Fuel tank leakage diagnosis method and device, automobile and computer readable storage medium - Google Patents
Fuel tank leakage diagnosis method and device, automobile and computer readable storage medium Download PDFInfo
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- CN111999000B CN111999000B CN202010802398.6A CN202010802398A CN111999000B CN 111999000 B CN111999000 B CN 111999000B CN 202010802398 A CN202010802398 A CN 202010802398A CN 111999000 B CN111999000 B CN 111999000B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
- B60R16/0232—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
- B60R16/0234—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions related to maintenance or repairing of vehicles
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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
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Abstract
The embodiment of the application discloses a method and a device for diagnosing oil tank leakage and an automobile, wherein the method for diagnosing the oil tank leakage comprises the following steps: the method comprises the steps of obtaining the starting state of an engine, and diagnosing the leakage of an oil tank according to the oiling mark bit of the automobile when the starting state is the starting of a heat engine, wherein the oiling mark bit of the automobile is used for indicating whether the automobile is oiled or not. And when the starting state is cold start, the leakage diagnosis is carried out on the oil tank according to the flameout state of the automobile, and the flameout state of the automobile is used for indicating whether the automobile is flameout at present. Therefore, the oil tank leakage diagnosis is automatically and intelligently realized under the condition of not increasing any diagnosis component, and the problems that the diagnosis cost is high, the 0.5mm leakage diagnosis and the coarse leakage diagnosis cannot be realized and the like in the conventional oil tank leakage diagnosis scheme can be solved.
Description
Technical Field
The present application relates to the field of automotive technologies, and in particular, to a method and an apparatus for diagnosing fuel tank leakage, an automobile, and a computer-readable storage medium.
Background
In order to reduce the influence of fuel steam and volatile matters on the environment, the national regulation of six places higher requirements on a steam system: the leakage quantity of the leakage point is required to be diagnosed to be larger than or equal to the leakage quantity generated by the small hole with the diameter of 1mm, and the leakage quantity generated by the small hole with the diameter of 0.5mm or larger can be used to replace the leakage quantity generated by the small hole with the diameter of 1mm according to the requirements of production enterprises. Therefore, how to diagnose the leakage of the fuel tank becomes an urgent problem to be solved in the industry.
At present, the following three methods are mainly adopted for diagnosing the fuel tank leakage: thermal expansion and cold contraction, active positive pressure and passive negative pressure. In practice, the thermal expansion and cold contraction method is mainly used for diagnosing after the automobile is shut down, and can only complete 0.5mm leakage diagnosis and cannot complete 1mm leakage diagnosis and coarse leakage diagnosis. The positive pressure method needs to add a set of pump components, increases the diagnosis cost, similarly needs to diagnose after the automobile is shut down, and cannot distinguish 0.5mm diagnosis and coarse leakage diagnosis. The passive negative pressure method has higher requirement on the running condition of the vehicle and lower diagnosis completion rate.
Disclosure of Invention
The embodiment of the application provides a method and a device for diagnosing oil tank leakage and an automobile, and aims to solve the problems of high cost, low diagnosis efficiency and the like in the existing leakage diagnosis method.
In a first aspect, an embodiment of the present application provides a fuel tank leakage diagnosis method, including: acquiring a starting state of an engine; when the starting state is the starting of a heat engine, the leakage diagnosis is carried out on the oil tank according to the oiling flag bit of the automobile, and the oiling flag bit of the automobile is used for indicating whether the automobile is oiled or not; and when the starting state is cold start, performing leakage diagnosis on the oil tank according to the flameout state of the automobile, wherein the flameout state of the automobile is used for indicating whether the automobile is flameout at present.
In some embodiments, the diagnosing of the fuel tank leakage according to the refueling flag of the vehicle includes: if the refueling mark bit of the automobile is used for indicating that the automobile is refueled, performing fuel tank cap leakage diagnosis on the fuel tank when the automobile meets a first enabling condition; the first enabling condition comprises at least one of: the running time of the engine exceeds a first time threshold, the driving speed exceeds a first speed threshold, the steam flow flowing through a carbon canister electromagnetic valve between the oil tank and the engine within a preset time is larger than a first flow threshold, and the ratio of the air pressure of an air inlet manifold of the engine to the ambient air pressure is smaller than a first air pressure ratio threshold.
In some embodiments, the diagnosing of the leakage of the fuel tank according to the key-off state of the vehicle includes: if the flameout state of the automobile is used for indicating that the automobile is flameout, carrying out small hole leakage diagnosis on the oil tank when the automobile meets a second enabling condition; the small hole leakage diagnosis is used for diagnosing whether the leakage amount of a leakage point of the oil tank is larger than or equal to the leakage amount generated by a small hole with the diameter of 0.5mm, and the second enabling condition comprises at least one of the following conditions: the driving distance is larger than a first distance threshold value, the environment temperature is within a first threshold value range, and the fuel level of the fuel tank is within a second threshold value range.
In some embodiments, if the diagnosis result of the small hole leakage diagnosis is used for indicating that the automobile has small hole leakage, the diagnosis result of the leakage diagnosis of the fuel tank at the next time is obtained, and whether an engine failure MIL lamp of the automobile is lightened or not is determined.
In some embodiments, the diagnosing of the leakage of the fuel tank according to the key-off state of the vehicle includes:
if the flameout state of the automobile is used for indicating that the automobile is not flameout, performing coarse leakage diagnosis on the oil tank when the automobile meets a third enabling condition; the coarse leak diagnosis is used for diagnosing whether the leakage amount of the leakage point of the oil tank is larger than or equal to the leakage amount generated by the small hole with the diameter of 2.25mm, and the third enabling condition comprises at least one of the following conditions: the running time of the engine exceeds a second time threshold, the running speed exceeds a second speed threshold, the steam flow flowing through the carbon tank electromagnetic valve within a predetermined time is larger than a second flow threshold, the ratio of the air pressure of the air inlet manifold to the ambient air pressure is smaller than a second air pressure ratio threshold, the battery voltage is within a third threshold range, and the fuel liquid level of the fuel tank is within a fourth threshold range.
In some embodiments, after the coarse leak diagnosis of the fuel tank, the method further comprises: if the refueling flag bit of the automobile is used for indicating that the automobile is refueled, judging whether the automobile meets a first enabling condition or not when the diagnosis result of the coarse leakage diagnosis is used for indicating that the automobile has coarse leakage, wherein the first enabling condition is used for indicating that the automobile is supported to carry out fuel tank cap leakage diagnosis; and if so, performing fuel tank cap leakage diagnosis on the fuel tank.
In some embodiments, if the vehicle does not satisfy the first enabling condition or the diagnosis result of the tank cap leakage diagnosis is used to indicate that the vehicle has a tank cap leakage, a diagnosis result of a leakage diagnosis of the tank at the next time is obtained, and it is determined whether to light an engine failure MIL lamp of the vehicle according to the obtained diagnosis result.
In some embodiments, if the diagnosis result of the tank cap leakage diagnosis is used to indicate that the vehicle does not have a tank cap leakage, the refueling flag of the vehicle is reset to indicate that the vehicle is not refueled.
In some embodiments, if the refueling flag of the vehicle is used to indicate that the vehicle is refueled, the refueling flag of the vehicle is reset to indicate that the vehicle is not refueled when the diagnosis result of the gross leak diagnosis is used to indicate that the vehicle does not have a gross leak.
In some embodiments, if the refueling flag of the vehicle is used to indicate that the vehicle is not refueled, when the diagnosis result of the gross leak diagnosis is used to indicate that the vehicle has a gross leak, a diagnosis result of a leak diagnosis of the fuel tank is obtained next time, and it is determined whether to light an MIL lamp of the vehicle according to the obtained diagnosis result.
In some embodiments, the diagnostic result of the leak diagnosis of the fuel tank is detected and acquired at least three consecutive times while the MIL lamp is lit; if the at least three diagnosis results are all used for indicating that the automobile has no leakage, turning off the MIL lamp; otherwise, keeping lighting the MIL lamp.
In a second aspect, a tank leak diagnosis apparatus is provided, which can perform the method of the first aspect or any one of the optional embodiments of the first aspect. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units corresponding to the above functions. The unit may be software and/or hardware.
In a third aspect, an automobile is provided, comprising: a processor and a memory coupled to the processor; wherein the memory comprises computer readable instructions; the processor is configured to execute the computer readable instructions in the memory, thereby causing the vehicle to perform the aspects of the first aspect or any one of the alternative embodiments of the first aspect.
In a fourth aspect, there is provided a computer program product which, when run on a computer, causes the computer to perform the method of the first aspect or any one of the alternative embodiments of the first aspect.
In a fifth aspect, there is provided a chip product for carrying out the method of the first aspect or any one of the alternative embodiments of the first aspect.
A sixth aspect provides a computer-readable storage medium having stored therein instructions, which, when run on a computer, cause the computer to perform the method of the first aspect or any one of the alternative embodiments of the first aspect.
Drawings
Fig. 1 is a system configuration diagram for tank leakage diagnosis according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of a fuel tank leakage diagnosis method according to an embodiment of the present invention.
Fig. 3 is a schematic flow chart of another tank leakage diagnosis method according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a fuel tank leakage device according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an automobile according to an embodiment of the present invention.
Detailed Description
Specific embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
The existing oil tank leakage diagnosis method can be divided into a thermal expansion and cold contraction method, an active positive pressure method and a passive negative pressure method from the perspective of evaporation system pressure. The thermal expansion and cold shrinkage method is characterized in that the difference value of a high pressure value and a vacuum value of fuel steam in a closed space is compared by utilizing the temperature change of the fuel tank after the engine is stopped and the thermal expansion and cold shrinkage characteristics of the fuel steam, and whether the fuel tank leaks or not is judged. The active positive pressure method is that an electronic pump is utilized to pump air into a reference hole and an oil tank to form positive pressure, and according to the characteristic that the higher the pressure value of the oil tank is, the higher the pump current value is, whether the oil tank leaks or not is detected by comparing the current magnitude in the air pumping process of the oil tank and the reference hole. The passive negative pressure method is to open a carbon tank electromagnetic valve TEV, utilize the negative pressure of an air inlet manifold to enable an oil tank to generate negative pressure, close the TEV to form a closed space, and judge whether the oil tank leaks or not according to the pressure change of the oil tank.
The inventor finds that the thermal expansion and cold contraction method is diagnosed after the automobile is shut down, can only complete the 0.5mm leakage diagnosis, and cannot distinguish the 1mm leakage diagnosis from the coarse leakage diagnosis. The active positive pressure method diagnosis needs to add a set of pump assembly, and the diagnosis cost is increased. Similarly, the 1mm leak diagnosis and the gross leak diagnosis cannot be distinguished after the vehicle is turned off. Most passive negative pressure methods accomplish coarse and 1mm leak diagnostics under idle conditions. One part of the passive negative pressure method completes the coarse leakage diagnosis in the driving process of the automobile and completes the 1mm leakage diagnosis in the idling process. Therefore, the passive negative pressure method can only carry out 1mm leakage diagnosis under the idle working condition, has higher requirement on the running working condition of the automobile and lower diagnosis completion rate.
In order to solve the problems, the application provides a fuel tank leakage diagnosis method, a system frame, a device and an automobile which are applicable to the method. Fig. 1 is a block diagram of a system for diagnosing fuel tank leakage according to the present application. As shown in fig. 1, the fuel tank includes a fuel tank 10(fuel tank), a fuel tank pressure sensor 11(fuel tank pressure sensor), a canister 12(carbon canister), a canister vent valve 13 (AAV), a canister solenoid valve 14 (TEV), an intake manifold 15(intake manifold), and an engine 16 (engine). Referring to fig. 1, fuel vapor in the fuel tank 10 fills the canister 12 and opens the TEV to flow into the engine 16, thereby operating the engine 16. During tank leak diagnostics, fuel vapor in the tank may flow to the engine 16 by gradually opening the TEV valve, using the pressure in the inlet manifold (pressure value) less than the pressure in the tank 10, so that the tank pressure value decreases. And if the integral of the flow of the TEV valve (namely the quantity of fuel steam flowing through the TEV within a preset time) reaches a certain threshold value, detecting whether the descending amplitude of the pressure value of the fuel tank exceeds the certain threshold value or not to identify whether the fuel tank has leakage or not. Specifically, if the specific value exceeds a certain threshold value, the leakage of the oil tank is indicated; otherwise, there is no leakage.
Referring to fig. 2, fig. 2 is a schematic flow chart of a fuel tank leakage diagnosis method provided by the present application. The fuel tank leakage diagnosis method shown in fig. 2 includes:
s201, the automobile acquires the starting state of the engine.
S202, when the starting state is the starting of the heat engine, the leakage diagnosis is carried out on the oil tank according to the oil filling marker bit of the automobile. The refueling position of the vehicle is used to indicate whether the vehicle is refueled.
Specifically, when the engine is started by a heat engine, whether the refueling flag bit of the automobile is set or not is judged, and if the refueling flag bit is not set, the fuel tank cap leakage diagnosis is not carried out if the refueling flag bit indicates that the automobile is not oiled. If the setting indicates that the automobile is filled with oil, the oil tank cap leakage diagnosis is carried out on the oil tank when the automobile meets the first enabling condition (namely the oil tank cap leakage diagnosis enabling condition). Wherein the first enabling condition is set by the system in a self-defining way, and the first enabling condition can include any one of the following items: the running time of the engine exceeds a first time threshold value, the driving speed exceeds a first speed threshold value, the TEV flow integral is greater than a first flow threshold value, and the ratio of the air pressure of the intake manifold (air pressure value) to the ambient air pressure is smaller than a first air pressure ratio threshold value.
Optionally, when the diagnosis result of the fuel tank cap leakage diagnosis is used for indicating that the fuel tank cap leakage exists in the fuel tank, the refueling flag bit is kept unchanged, the automobile does not light the engine fault MIL lamp, and the fuel tank cap leakage fault does not need to be written into the fault memory. Optionally, when the diagnosis result of the tank cap leakage diagnosis is used to indicate that there is no tank cap leakage in the fuel tank, the refueling flag bit of the vehicle may be reset or cleared to indicate that the vehicle is not refueled.
And S203, when the starting state is cold start, performing leakage diagnosis on the oil tank according to the flameout state of the automobile. The key-off status of the vehicle is used to indicate whether the vehicle is currently turned off.
When the engine is started in a cold state, whether the flameout state of the automobile is used for indicating that the automobile is flameout is judged. When the flameout state is used for indicating that the automobile is flameout, the small hole leakage diagnosis can be carried out on the oil tank. An orifice here may refer to an orifice with a diameter below a certain threshold, for example a 0.5mm or 1mm orifice. Specifically, when the vehicle satisfies the second enabling condition (small hole leakage diagnosis condition), the small hole leakage diagnosis is performed on the fuel tank. The second enabling condition is a system-defined setting, which may include, but is not limited to, the travel distance being greater than a first travel threshold, the ambient temperature being within a first threshold range, the fuel level of the fuel tank being within a second threshold range, and so forth. On the contrary, when the vehicle does not satisfy the second enabling condition, the pinhole leak diagnosis is not performed.
Alternatively, if the diagnosis result of the small hole leakage diagnosis is used to indicate that there is a small hole leakage in the fuel tank, the diagnosis result of the leakage diagnosis of the fuel tank in the second (next) driving cycle is acquired, and it is determined whether to light the MIL lamp of the automobile based on the diagnosis result. Specifically, if the diagnosis result is used for indicating that the oil tank has leakage, the MIL lamp is lightened, and the diagnosis result is written into a fault memory; otherwise, the MIL lamp is not lighted, and the small hole leakage is written into the fault memory.
And if the diagnosis result of the small hole leakage diagnosis is used for indicating that the oil tank does not have small hole leakage, the automobile does not report the number, namely, the small hole leakage fault is not written.
When the flameout state of the vehicle is used for indicating that the vehicle is not flameout, whether the vehicle currently meets a third enabling condition (a rough leakage diagnosis condition) is judged. And when the third enabling condition is met, performing coarse leakage diagnosis on the oil tank. The coarse leakage refers to the leakage amount of a leakage point which is larger than or equal to the leakage amount generated by a small hole with the diameter of 2.25 mm. The third enabling condition is system-defined, which may include, but is not limited to, any of the following: the running time of the engine exceeds a second time threshold, the driving speed exceeds a second speed threshold, the TEV flow integral is greater than a second flow threshold, the ratio of the air pressure of the air inlet manifold to the ambient air pressure is smaller than a second air pressure ratio threshold, the battery voltage is in a third threshold range, the fuel level of the fuel tank is in a fourth threshold range, and the like. The time threshold, the flow threshold, the air pressure threshold and the range of each threshold related to the application are all set by the system in a self-defined way, and the time threshold, the flow threshold, the air pressure threshold and the range of each threshold can be different from each other, and the application is not limited. It should be noted that the embodiments of the present application are applied to terminal devices including, but not limited to, automobiles, trucks, trains or other vehicles, and the present application is only illustrated by taking automobiles as an example, but not limited thereto.
Fig. 3 is a schematic flow chart of another tank leakage diagnosis method provided by the present application. As shown in fig. 3, the method comprises the following steps:
and S301, judging whether the automobile meets a third enabling condition or not when the automobile is not flamed out.
When the automobile meets the third enabling condition, continuing to execute the step S302; otherwise, ending the flow.
And S302, judging whether the refueling flag bit of the automobile is set.
The automobile judges whether the automobile is refueled or not by judging whether the refueling flag bit is set or not. Specifically, if the refueling flag bit of the vehicle is not set, the step S303 is continuously executed. If the refueling flag of the vehicle is set, the process continues to step S312.
And S303, performing coarse leakage diagnosis on the oil tank to obtain a diagnosis result of the coarse leakage diagnosis.
S304, judging whether the diagnosis result of the coarse leakage diagnosis is used for indicating that the oil tank has coarse leakage.
If the diagnosis result of the coarse leak diagnosis is used to indicate that the fuel tank (automobile) does not have a coarse leak, the flow ends. If there is a coarse leak, execution continues with step S305.
And S305, judging whether the diagnosis result of the leakage diagnosis of the fuel tank in the second driving cycle (next time) is used for indicating that the fuel tank has leakage.
And S306, if the diagnosis result is used for indicating that the fuel tank has leakage, lightening an MIL lamp and reporting a code.
And S307, if the diagnosis result is used for indicating that the fuel tank has no leakage, the MIL lamp and the code are not lightened.
S308, if the MIL lamp is lightened, detecting and acquiring the diagnosis result of the leakage diagnosis of the fuel tank for at least three times continuously
S309, judging whether the diagnosis results of at least three consecutive times are all used for indicating that the oil tank has leakage.
If the diagnosis results of at least three consecutive times are all used for indicating that the oil tank has the leakage, continuing to the step S310; otherwise, step S311 is performed.
S310, extinguishing the MIL lamp.
And S311, keeping the MIL lamp on.
And S312, performing coarse leakage diagnosis on the oil tank to obtain a diagnosis result of the coarse leakage diagnosis.
And S313, judging whether the diagnosis result of the coarse leakage diagnosis is used for indicating that the oil tank has coarse leakage.
If the diagnosis result of the coarse leakage diagnosis is used for indicating that the oil tank has no coarse leakage, continuing to execute the step S314; otherwise, steps S315 and S319 are performed.
And S314, resetting the refueling mark position of the automobile to indicate that the automobile is not refueled.
S315, requesting to display the 'seal light the fuel cap' on the instrument panel, and tightening the fuel tank cover. To indicate to the driver that the fuel tank cap is not screwed down.
S316, judging whether the 'seal light the fuel cap' on the instrument panel is continuously displayed for at least a times, wherein a is a positive integer set by the system in a self-defined way, for example 3.
If the "great light the fuel cap" on the dashboard is displayed for at least a times continuously, continue to execute step S318; otherwise, the process continues to step S317.
S317, keeping displaying the 'seal light the fuel cap' on the instrument panel.
S318, not displaying the 'seal light the fuel cap' on the instrument panel.
S319, when the diagnosis result of the coarse leakage diagnosis is used to indicate that the fuel tank has a coarse leakage, it may be continuously determined whether the vehicle satisfies a first enabling condition, where the first enabling condition is a condition for the fuel tank cap leakage diagnosis.
And if the automobile does not meet the first enabling condition, continuing to execute the steps S305 to S307. If the automobile satisfies the first enabling condition, step S320 is executed. It should be noted that, during driving, the tank cap leakage diagnosis is performed if the vehicle satisfies the first enabling condition during the same driving cycle. If the engine is flameout, the fuel tank cap diagnosis is not finished or the fuel tank cap leakage diagnosis enabling condition is not met during the period, the coarse leakage fault can be written into the fault memory, and the automobile still determines the fuel tank cap diagnosis leakage at the moment.
And S320, performing fuel tank cap leakage diagnosis on the fuel tank to obtain a diagnosis result of the fuel tank cap leakage diagnosis.
S321, judging whether the diagnosis result of the fuel tank cap leakage diagnosis is used for indicating that the fuel tank has fuel tank cap leakage.
If there is a fuel tank cap leak, the process proceeds to steps S305 to S307. Otherwise, go to step S322.
S322, resetting the oiling mark position, and displaying no 'seal light the fuel cap' on the instrument panel without code reporting.
By implementing the embodiment of the application, the automobile can acquire the starting state of the engine, when the starting state is the starting of the heat engine, the leakage diagnosis is carried out on the oil tank according to the oiling mark bit of the automobile, and the oiling mark bit of the automobile is used for indicating whether the automobile is oiled or not. And when the motion state is cold start, the leakage diagnosis is carried out on the oil tank according to the flameout state of the automobile, and the flameout state of the automobile is used for indicating whether the automobile is flameout at present. Therefore, the oil tank leakage diagnosis is automatically and intelligently realized under the condition of not increasing any diagnosis component, and the problems that the diagnosis cost is high, the 0.5mm leakage diagnosis and the coarse leakage diagnosis cannot be realized and the like in the conventional oil tank leakage diagnosis scheme can be solved.
Based on the foregoing embodiments, the following describes an apparatus and an automobile to which the present application is applied. Fig. 4 is a schematic diagram of a tank leakage diagnosis apparatus 400 according to an embodiment of the present disclosure. The acquisition unit 401 is included as shown in figure 4-among others a diagnostic unit 402,
the acquisition unit 401 is used to acquire the starting state of the engine;
the diagnosis unit 402 is configured to perform leakage diagnosis on the oil tank according to a refueling flag bit of the automobile when the starting state is the heat engine starting, where the refueling flag bit of the automobile is used to indicate whether the automobile is refueled;
the diagnosis unit 402 is further configured to perform a leakage diagnosis on the fuel tank according to a flameout state of the vehicle when the starting state is cold start, where the flameout state of the vehicle is used to indicate whether the vehicle is currently flameout.
In some embodiments, the diagnosing unit 402 is configured to perform a tank cap leakage diagnosis on the fuel tank when the vehicle satisfies a first enabling condition if a refueling flag of the vehicle is used to indicate that the vehicle is refueled; the first enabling condition comprises at least one of: the running time of the engine exceeds a first time threshold, the driving speed exceeds a first speed threshold, the steam flow flowing through a carbon canister electromagnetic valve between the oil tank and the engine within a preset time is larger than a first flow threshold, and the ratio of the air pressure of an air inlet manifold of the engine to the ambient air pressure is smaller than a first air pressure ratio threshold.
In some embodiments, the diagnosing unit 402 is configured to perform the small hole leakage diagnosis on the fuel tank when the vehicle satisfies a second enabling condition if a key-off state of the vehicle is used to indicate that the vehicle is key-off; the second enabling condition comprises at least one of: the driving distance is larger than a first distance threshold value, the environment temperature is within a first threshold value range, and the fuel level of the fuel tank is within a second threshold value range. Wherein the small hole leakage diagnosis is used for diagnosing whether the leakage quantity of the leakage point of the oil tank is larger than or equal to the leakage quantity generated by the small hole with the diameter of 0.5 mm.
In some embodiments, the obtaining unit 401 is configured to obtain a diagnosis result of a leak diagnosis of the fuel tank next time if the diagnosis result of the small hole leak diagnosis is used to indicate that the vehicle has a small hole leak, and determine whether to light an engine failure MIL lamp of the vehicle.
In some embodiments, the diagnosing unit 402 is configured to perform a coarse leakage diagnosis on the fuel tank when the vehicle satisfies a third enabling condition if an ignition-off state of the vehicle is used to indicate that the vehicle is not turned off; the third enabling condition comprises at least one of: the running time of the engine exceeds a second time threshold, the driving speed exceeds a second speed threshold, the steam flow flowing through the carbon tank electromagnetic valve within a preset time is larger than a second flow threshold, the ratio of the air pressure of the air inlet manifold to the ambient air pressure is smaller than a second air pressure ratio threshold, the battery voltage is within a third threshold range, and the fuel liquid level of the fuel tank is within a fourth threshold range. Wherein the coarse leak diagnosis is used to diagnose whether the amount of leakage at the leak point of the fuel tank is greater than or equal to the amount of leakage generated by a small hole with a diameter of 2.25 mm.
In some embodiments, the apparatus further comprises a determination unit 403. If the refueling flag of the vehicle is used to indicate that the vehicle is refueled, the determining unit 403 determines whether the vehicle meets a first enabling condition when the diagnosis result of the coarse leakage diagnosis is used to indicate that the vehicle has coarse leakage, where the first enabling condition is used to indicate that the vehicle is supported to perform the tank cap leakage diagnosis; and if so, carrying out fuel tank cap leakage diagnosis on the fuel tank.
In some embodiments, the obtaining unit 401 is configured to obtain a diagnosis result of a fuel tank leakage diagnosis next time if the vehicle does not satisfy the first enabling condition or the diagnosis result of the fuel tank leakage diagnosis is used to indicate that the vehicle has a fuel tank cover leakage, and determine whether to light an engine failure MIL lamp of the vehicle.
In some embodiments, the apparatus further comprises a reset unit 404. The resetting unit 404 is configured to reset the refueling flag bit of the vehicle to indicate that the vehicle is not refueled if the tank cap leakage diagnosis result is used to indicate that the vehicle does not have tank cap leakage.
In some embodiments, the resetting unit 404 is configured to reset the refueling flag of the vehicle to indicate that the vehicle is not refueled when the diagnosis result of the gross leak diagnosis indicates that the vehicle does not have the gross leak if the refueling flag of the vehicle is used to indicate that the vehicle is refueled.
In some embodiments, the obtaining unit 401 is configured to, if the refueling flag of the vehicle is used to indicate that the vehicle is not refueled, obtain a diagnosis result of a leak diagnosis of the fuel tank next time when the diagnosis result of the gross leak diagnosis is used to indicate that the vehicle has a gross leak, and determine whether to light an MIL lamp of the vehicle.
In some embodiments, the obtaining unit 401 is configured to detect and obtain a diagnosis result of the leak diagnosis of the fuel tank at least three times in succession when the MIL lamp is turned on; if the at least three diagnosis results are all used for indicating that the automobile has no leakage, turning off the MIL lamp; otherwise, keeping lighting the MIL lamp.
By implementing the embodiment of the application, the automobile can acquire the starting state of the engine, when the starting state is the starting of the heat engine, the leakage diagnosis is carried out on the oil tank according to the oiling mark bit of the automobile, and the oiling mark bit of the automobile is used for indicating whether the automobile is oiled or not. And when the motion state is cold start, the leakage diagnosis is carried out on the oil tank according to the flameout state of the automobile, and the flameout state of the automobile is used for indicating whether the automobile is flameout at present. Therefore, the oil tank leakage diagnosis is automatically and intelligently realized under the condition of not increasing any diagnosis component, and the problems that the diagnosis cost is high, the 0.5mm leakage diagnosis and the coarse leakage diagnosis cannot be realized and the like in the conventional oil tank leakage diagnosis scheme can be solved.
According to the oil tank leakage diagnosis method, the actual operation working conditions (driving process, flameout and the like) of the automobile are comprehensively considered, the enabling conditions of various leakage diagnosis implementation are determined, the diagnosis can be completed in the driving process, the adaptability is high, and the diagnosis completion rate is high; and not only can realize 0.5mm leakage diagnosis, need not extra spare part simultaneously, just can realize that coarse leakage diagnoses and fuel tank cap leak diagnosis, the diagnostic function is more comprehensive, abundant and reliable, and the cost is lower. In addition, because the fuel tank cap leakage diagnosis can be realized in the actual operation working conditions of the automobile such as the driving process, the flameout and the like, the driver can be timely reminded when the fuel tank leakage is found, and the driving safety is improved.
Please refer to fig. 5, which is a schematic diagram illustrating the result of an automobile according to an embodiment of the present application. The automobile 500 shown in fig. 5 includes: at least one input device 501; at least one output device 502; at least one processor 503, such as a CPU; and a memory 504, the input device 501, the output device 502, the processor 503, and the memory 504 being connected by a bus 505.
The input device 501 may be a touch panel of a mobile terminal, and includes a touch screen and a touch screen, and is configured to detect an operation instruction on the touch panel of the terminal.
The output device 502 may be a display screen of the mobile terminal, and is used for outputting and displaying information.
The memory 504 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 504 is used for storing a set of program codes, and the input device 501, the output device 502 and the processor 503 are used for calling the program codes stored in the memory 504, and performing the following operations:
a processor 503 for obtaining a starting state of the engine; when the starting state is the starting of a heat engine, the leakage diagnosis is carried out on the oil tank according to an oil filling marker bit of the automobile, and the oil filling marker bit of the automobile is used for indicating whether the automobile is filled with oil or not; and when the starting state is cold start, performing leakage diagnosis on the oil tank according to the flameout state of the automobile, wherein the flameout state of the automobile is used for indicating whether the automobile is flameout currently.
In some embodiments, the processor 503 is specifically configured to perform a tank cap leak diagnosis on the fuel tank when the vehicle satisfies a first enabling condition if the refueling flag of the vehicle is used to indicate that the vehicle is refueled; the first enabling condition comprises at least one of: the running time of the engine exceeds a first time threshold, the running speed exceeds a first speed threshold, the steam flow flowing through the carbon tank electromagnetic valve within a preset time is larger than a first flow threshold, and the ratio of the air pressure of the air inlet manifold to the ambient air pressure is smaller than a first air pressure ratio threshold.
In some embodiments, the processor 503 is specifically configured to perform the small hole leakage diagnosis on the fuel tank when the vehicle satisfies a second enabling condition if the key-off state of the vehicle is used to indicate that the vehicle is key-off; the small hole leakage diagnosis is used for diagnosing whether the leakage quantity of the leakage point of the oil tank is larger than or equal to the leakage quantity generated by the small hole with the diameter of 0.5 mm. The second enabling condition comprises at least one of: the driving distance is larger than a first distance threshold value, the environment temperature is within a first threshold value range, and the fuel level of the fuel tank is within a second threshold value range.
In some embodiments, the processor 503 is further configured to obtain a diagnosis result of the next leak diagnosis of the fuel tank and determine whether to light an engine failure MIL lamp of the vehicle if the diagnosis result of the small hole leak diagnosis is used to indicate that the vehicle has a small hole leak.
In some embodiments, the processor 503 is specifically configured to perform a coarse leakage diagnosis on the fuel tank when the vehicle satisfies a third enabling condition if the key-off state of the vehicle is used to indicate that the vehicle is not key-off; the coarse leak diagnostic is used to diagnose whether the amount of leakage at the leak point of the tank is greater than or equal to the amount of leakage from a small hole having a diameter of 2.25 mm. The third enabling condition comprises at least one of: the running time of the engine exceeds a second time threshold, the driving speed exceeds a second speed threshold, the steam flow flowing through the carbon tank electromagnetic valve within a preset time is larger than a second flow threshold, the ratio of the air pressure of the air inlet manifold to the ambient air pressure is smaller than a second air pressure ratio threshold, the battery voltage is within a third threshold range, and the fuel liquid level of the fuel tank is within a fourth threshold range.
In some embodiments, the processor 503 is further configured to determine whether the vehicle meets a first enabling condition when the diagnosis result of the gross leak diagnosis is used to indicate that the vehicle has a gross leak, if the refueling flag of the vehicle is used to indicate that the vehicle has been refueled, the first enabling condition being used to indicate that the vehicle is supported for tank cap leak diagnosis; and if so, carrying out fuel tank cap leakage diagnosis on the fuel tank.
In some embodiments, the processor 503 is further configured to obtain a diagnosis result of the fuel tank leakage diagnosis next time if the vehicle does not satisfy the first enabling condition or the diagnosis result of the fuel tank cover leakage diagnosis is used to indicate that the vehicle has a fuel tank cover leakage, and determine whether to light an engine failure MIL lamp of the vehicle.
In some embodiments, the processor 503 is further configured to reset the refueling flag of the vehicle to indicate that the vehicle is not refueled if the tank cap leak diagnosis result indicates that the vehicle does not have a tank cap leak.
In some embodiments, the processor 503 is further configured to reset the refueling flag of the vehicle to indicate that the vehicle is not refueled when the diagnosis result of the gross leak diagnosis indicates that the vehicle does not have a gross leak if the refueling flag of the vehicle indicates that the vehicle is refueled.
In some embodiments, the processor 503 is further configured to obtain a diagnosis result of the fuel tank leakage diagnosis next time when the diagnosis result of the gross leakage diagnosis is used to indicate that the vehicle has a gross leakage if the refueling flag of the vehicle is used to indicate that the vehicle is not refueled, and determine whether to light an MIL light of the vehicle.
In some embodiments, the processor 503 is further configured to detect and obtain a diagnosis result of the leak diagnosis of the fuel tank for at least three consecutive times when the MIL light is turned on; if the at least three diagnostic results are all used for indicating that the automobile has no leakage, turning off the MIL lamp; otherwise, keeping lighting the MIL lamp.
Based on the same inventive concept, the principle of solving the problem of the terminal device provided in the embodiment of the present application is similar to the principle of solving the problem of the terminal device in the embodiment of the method of the present application, so that the implementation of each device may refer to the implementation of the method, and is not described herein again for brevity.
It should be noted that, in the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to relevant descriptions of other embodiments for parts that are not described in detail in a certain embodiment.
The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs.
The modules in the terminal equipment of the embodiment of the invention can be merged, divided and deleted according to actual needs.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (12)
1. A method of diagnosing fuel tank leakage, comprising:
acquiring a starting state of an engine;
when the starting state is the starting of a heat engine, the leakage diagnosis is carried out on the oil tank according to an oil filling marker bit of the automobile, wherein the oil filling marker bit of the automobile is used for indicating whether the automobile is filled with oil or not; the step of diagnosing the leakage of the oil tank according to the refueling mark bit of the automobile comprises the following steps: if the refueling flag bit of the automobile indicates that the automobile is refueled, performing fuel tank cap leakage diagnosis on the fuel tank when the automobile meets a first enabling condition;
when the starting state is cold start, the oil tank is subjected to leakage diagnosis according to the flameout state of the automobile, and the flameout state of the automobile is used for indicating whether the automobile is flameout or not; the diagnosing leakage of the fuel tank according to the flameout state of the automobile comprises: if the flameout state of the automobile indicates that the automobile is flameout, when the automobile meets a second enabling condition, carrying out small hole leakage diagnosis on the oil tank, wherein the small hole leakage diagnosis is used for diagnosing whether the leakage quantity of a leakage point of the oil tank is larger than or equal to the leakage quantity generated by a small hole with the diameter of 0.5 mm;
wherein the first enabling condition comprises at least one of: the running time of the engine exceeds a first time threshold, the driving speed exceeds a first speed threshold, the steam flow flowing through a carbon canister electromagnetic valve between the oil tank and the engine within a preset time is larger than a first flow threshold, and the ratio of the air pressure of an air inlet manifold of the engine to the ambient air pressure is smaller than a first air pressure ratio threshold;
the second enabling condition comprises at least one of: the driving distance is larger than a first distance threshold value, the environment temperature is within a first threshold value range, and the fuel level of the fuel tank is within a second threshold value range.
2. The tank leak diagnosis method according to claim 1, further comprising:
and if the diagnosis result of the small hole leakage diagnosis indicates that the automobile has small hole leakage, acquiring the result of the next leakage diagnosis of the oil tank, and determining whether to light an engine fault MIL lamp of the automobile or not according to the acquired result.
3. The fuel tank leakage diagnosis method according to claim 1, wherein the performing of the leakage diagnosis of the fuel tank according to the key-off state of the automobile includes:
if the flameout state of the automobile indicates that the automobile is not flameout, performing coarse leakage diagnosis on the oil tank when the automobile meets a third enabling condition, wherein the coarse leakage diagnosis is used for diagnosing whether the leakage amount of a leakage point of the oil tank is larger than or equal to the leakage amount generated by a small hole with the diameter of 2.25 mm;
the third enabling condition comprises at least one of: the running time of the engine exceeds a second time threshold, the running speed exceeds a second speed threshold, the steam flow flowing through a carbon canister electromagnetic valve between the oil tank and the engine within a preset time period is larger than a second flow threshold, the ratio of the air pressure of an air inlet manifold of the engine to the ambient air pressure is smaller than a second air pressure ratio threshold, the battery voltage is within a third threshold range, and the fuel liquid level of the oil tank is within a fourth threshold range.
4. A tank leak diagnosis method according to claim 3, wherein after the coarse leak diagnosis of the tank, the tank leak diagnosis method further comprises:
if the refueling flag bit of the automobile indicates that the automobile is refueled, further judging whether the automobile meets a first enabling condition when the diagnosis result of the coarse leakage diagnosis indicates that the automobile has coarse leakage, wherein the first enabling condition is used for indicating and supporting the automobile to carry out fuel tank cap leakage diagnosis;
and if the automobile meets the first enabling condition, further performing fuel tank cap leakage diagnosis on the fuel tank.
5. The tank leak diagnosis method according to claim 4, further comprising:
if the automobile does not meet the first enabling condition or the diagnosis result of the fuel tank cap leakage diagnosis indicates that the automobile has fuel tank cap leakage, acquiring the result of the next fuel tank leakage diagnosis, and determining whether to light an engine failure MIL lamp of the automobile or not according to the acquired result.
6. The tank leak diagnosis method according to claim 4, further comprising:
if the diagnosis result of the fuel tank cap leakage diagnosis indicates that the vehicle does not have fuel tank cap leakage, resetting the refueling mark position of the vehicle to indicate that the vehicle is not refueled.
7. The tank leak diagnosis method according to claim 3, further comprising:
if the refueling marker bit of the automobile indicates that the automobile is refueled, resetting the refueling marker bit of the automobile to indicate that the automobile is not refueled when the diagnosis result of the coarse leakage diagnosis indicates that the automobile does not have coarse leakage.
8. The tank leak diagnosis method according to claim 3, further comprising:
and if the refueling flag bit of the automobile indicates that the automobile is not refueled, when the diagnosis result of the coarse leakage diagnosis indicates that the automobile has coarse leakage, acquiring the result of the leakage diagnosis of the oil tank next time, and determining whether to light the MIL lamp of the automobile or not according to the acquired result.
9. The tank leak diagnosis method according to any one of claims 2, 5, or 8, further comprising:
detecting and acquiring results of leakage diagnosis of the fuel tank for at least three consecutive times when the MIL lamp is lighted;
if the obtained results of at least three times indicate that the automobile has no leakage, turning off the MIL lamp; otherwise, keeping lighting the MIL lamp.
10. A tank leak diagnosis device, comprising an acquisition unit and a diagnosis unit, wherein:
the acquisition unit is used for acquiring the starting state of the engine;
the diagnosis unit is used for carrying out leakage diagnosis on the oil tank according to an oil filling marker bit of the automobile when the starting state is the heat engine starting state, and the oil filling marker bit of the automobile is used for indicating whether the automobile is filled with oil or not; the step of diagnosing the leakage of the oil tank according to the refueling mark bit of the automobile comprises the following steps: if the refueling flag bit of the automobile indicates that the automobile is refueled, performing fuel tank cap leakage diagnosis on the fuel tank when the automobile meets a first enabling condition;
the diagnosis unit is further used for carrying out leakage diagnosis on the oil tank according to the flameout state of the automobile when the starting state is cold start, and the flameout state of the automobile is used for indicating whether the automobile is flameout currently; the diagnosing leakage of the fuel tank according to the flameout state of the automobile comprises: if the flameout state of the automobile indicates that the automobile is flameout, when the automobile meets a second enabling condition, carrying out small hole leakage diagnosis on the oil tank, wherein the small hole leakage diagnosis is used for diagnosing whether the leakage quantity of a leakage point of the oil tank is larger than or equal to the leakage quantity generated by a small hole with the diameter of 0.5 mm;
wherein the first enabling condition comprises at least one of: the running time of the engine exceeds a first time threshold, the driving speed exceeds a first speed threshold, the steam flow flowing through a carbon canister electromagnetic valve between the oil tank and the engine within a preset time is larger than a first flow threshold, and the ratio of the air pressure of an air inlet manifold of the engine to the ambient air pressure is smaller than a first air pressure ratio threshold;
the second enabling condition comprises at least one of: the driving distance is larger than a first distance threshold value, the environment temperature is within a first threshold value range, and the fuel level of the fuel tank is within a second threshold value range.
11. An automobile comprising a processor and a memory coupled to the processor, the memory comprising computer readable instructions, the processor being configured to execute the computer readable instructions in the memory to implement the tank leak diagnostic method of any one of claims 1 to 9.
12. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program comprising program instructions that, when executed by a processor, cause the processor to carry out the tank leakage diagnostic method according to any one of claims 1 to 9.
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| CN202010802398.6A CN111999000B (en) | 2020-08-11 | 2020-08-11 | Fuel tank leakage diagnosis method and device, automobile and computer readable storage medium |
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| CN202010802398.6A CN111999000B (en) | 2020-08-11 | 2020-08-11 | Fuel tank leakage diagnosis method and device, automobile and computer readable storage medium |
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| CN116026532A (en) * | 2023-03-27 | 2023-04-28 | 苏州恩都法汽车系统股份有限公司 | Sectional type leakage diagnosis system, sectional type leakage diagnosis method and vehicle |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0267333A1 (en) * | 1986-11-12 | 1988-05-18 | Expertek, Inc. | Fuel tank leak detection apparatus |
| CN102183346A (en) * | 2010-07-15 | 2011-09-14 | 上海霍富汽车锁具有限公司 | Method for detecting leakage flow of automobile oil tank cover |
| CN108230298A (en) * | 2016-12-15 | 2018-06-29 | 福特全球技术公司 | Automatic Vehicle Leak Detection |
| CN109733188A (en) * | 2018-12-19 | 2019-05-10 | 东风汽车集团有限公司 | Fuel tank fuel door opens and closes safety protection control method |
| CN110044556A (en) * | 2019-04-10 | 2019-07-23 | 重庆长安汽车股份有限公司 | A kind of detection device and detection method of vehicle fuel oil evaporation system sealing |
| CN110671222A (en) * | 2019-10-31 | 2020-01-10 | 安徽江淮汽车集团股份有限公司 | Fuel leakage diagnosis method, device and computer readable storage medium |
| CN111472899A (en) * | 2019-01-23 | 2020-07-31 | 比亚迪股份有限公司 | Leakage diagnosis method and device for fuel oil evaporative emission system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10843702B2 (en) * | 2018-06-06 | 2020-11-24 | Ford Global Technologies, Llc | Methods and systems for oil leak determination |
-
2020
- 2020-08-11 CN CN202010802398.6A patent/CN111999000B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0267333A1 (en) * | 1986-11-12 | 1988-05-18 | Expertek, Inc. | Fuel tank leak detection apparatus |
| CN102183346A (en) * | 2010-07-15 | 2011-09-14 | 上海霍富汽车锁具有限公司 | Method for detecting leakage flow of automobile oil tank cover |
| CN108230298A (en) * | 2016-12-15 | 2018-06-29 | 福特全球技术公司 | Automatic Vehicle Leak Detection |
| CN109733188A (en) * | 2018-12-19 | 2019-05-10 | 东风汽车集团有限公司 | Fuel tank fuel door opens and closes safety protection control method |
| CN111472899A (en) * | 2019-01-23 | 2020-07-31 | 比亚迪股份有限公司 | Leakage diagnosis method and device for fuel oil evaporative emission system |
| CN110044556A (en) * | 2019-04-10 | 2019-07-23 | 重庆长安汽车股份有限公司 | A kind of detection device and detection method of vehicle fuel oil evaporation system sealing |
| CN110671222A (en) * | 2019-10-31 | 2020-01-10 | 安徽江淮汽车集团股份有限公司 | Fuel leakage diagnosis method, device and computer readable storage medium |
Non-Patent Citations (1)
| Title |
|---|
| 冯彧等;车辆燃油蒸发系统泄漏诊断试验研究;《公路与汽运》;20180331(第2期);第13-16页 * |
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