CN111140390B - Control method and device for vehicle fuel system - Google Patents
Control method and device for vehicle fuel system Download PDFInfo
- Publication number
- CN111140390B CN111140390B CN201811311137.3A CN201811311137A CN111140390B CN 111140390 B CN111140390 B CN 111140390B CN 201811311137 A CN201811311137 A CN 201811311137A CN 111140390 B CN111140390 B CN 111140390B
- Authority
- CN
- China
- Prior art keywords
- fuel system
- oil
- oil pump
- resistor
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
- F02D2041/223—Diagnosis of fuel pressure sensors
-
- 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
- F02D2041/224—Diagnosis of the fuel system
-
- 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
- F02D2041/224—Diagnosis of the fuel system
- F02D2041/225—Leakage detection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention provides a control method and a device of a vehicle fuel system, wherein the control method of the vehicle fuel system comprises any one or more of the following three steps: performing pre-inspection operation on a fuel system before starting an engine; when the engine is started, starting self-checking operation is carried out on the fuel system; after the vehicle is started, the fuel system is subjected to driving self-checking operation. The control method and the control device of the vehicle fuel system can monitor the working state of the vehicle fuel system in real time at any one or more moments before the engine is started, when the engine is started and after the vehicle is started, can realize self-diagnosis of the vehicle fuel system, can find faults of the vehicle fuel system in time, and effectively ensure the safety and the reliability of the vehicle.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a control method and a control device for a vehicle fuel system.
Background
With the improvement of the living standard of people, automobiles have gone into thousands of households, and the transition from a transportation tool to an intelligent living facility is gradually carried out. While people enjoy the convenience brought by automobiles, automobile safety is also more and more emphasized, and intelligent safety configuration is gradually becoming a main selling point for various automobile manufacturers. For a fuel vehicle, because the fuel adopted by the fuel vehicle has high risk of flammability and explosiveness, the fuel system must ensure the safety of fuel storage, in addition, whether an engine works normally or not is also related to the driving safety, and the fuel system also needs to ensure the safety and the reliability of a fuel delivery channel.
In the related technology, the safety of the fuel system is mainly embodied in the aspects of reasonable structural arrangement, component reliability and the like, a real-time monitoring function of the fuel system is not established, the problems of failure and the like of no early warning of parts exist, in addition, the problem of fuel exhaustion without early warning due to inaccurate instrument indication can be caused by wrong liquid level signals, and the potential safety hazard of vehicles is caused.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first object of the present invention is to provide a method for controlling a vehicle fuel system, which monitors the operating status of the vehicle fuel system in real time at any one or more times before the engine is started, during the engine is started, and after the vehicle is started, so as to realize self-diagnosis of the vehicle fuel system, find out the fault of the vehicle fuel system in time, and effectively ensure the safety and reliability of the vehicle.
A second object of the invention is to propose a control device for a vehicle fuel system.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a control method for a vehicle fuel system, including any one or more of the following three steps:
performing pre-detection operation on the fuel system before starting an engine;
when the engine is started, starting self-checking operation is carried out on the fuel system;
after the vehicle is started, carrying out driving self-checking operation on the fuel system;
wherein, the operation of carrying out the preliminary examination to the fuel system comprises:
and providing working voltage for the oil pump for set time.
The control method of the vehicle fuel system provided by the embodiment of the invention comprises any one or more of the following three steps: performing pre-inspection operation on a fuel system before starting an engine; when the engine is started, starting self-checking operation is carried out on the fuel system; after the vehicle is started, performing driving self-checking operation on the fuel system; wherein, carry out preliminary examination operation to the fuel system, include: and providing working voltage for the oil pump for set time. The working state of the vehicle fuel system is monitored in real time at any one or more moments before the engine is started, when the engine is started and after the vehicle is started, self-diagnosis of the vehicle fuel system can be realized, faults of the vehicle fuel system can be found in time, and safety and reliability of the vehicle are effectively guaranteed.
According to an embodiment of the present invention, before the providing the operating voltage for the oil pump for the set time, the pre-checking operation of the fuel system further includes: acquiring residual oil pressure of a pipeline; judging whether the pipeline residual oil pressure is equal to or greater than the minimum pressure which can be monitored by a pressure sensor and is equal to or less than the rated oil supply pressure of the fuel system; if not, outputting a pressure sensor fault alarm signal.
According to an embodiment of the present invention, before the providing the operating voltage for the oil pump for the set time, the pre-checking operation of the fuel system further includes: acquiring a first resistor between a first end of a liquid level sensor and a slide sheet, a second resistor between the first end of the liquid level sensor and a second end of the liquid level sensor, and a third resistor between the second end of the liquid level sensor and the slide sheet; judging whether the sum of the first resistor and the third resistor is equal to the second resistor; if not, a fault alarm signal of the liquid level sensor is output.
According to an embodiment of the present invention, before the providing the operating voltage for the oil pump for the set time, the performing a pre-check operation on the fuel system further includes: if yes, calculating the amount of the remaining fuel in the fuel tank according to the first resistor and the second resistor, or according to the first resistor and the third resistor, or according to the second resistor and the third resistor; judging whether the residual fuel quantity in the fuel tank is larger than a preset low fuel quantity threshold value or not; and if the oil quantity is equal to or less than the low oil quantity threshold value, outputting a low oil quantity alarm signal.
According to one embodiment of the invention, the pre-checking operation of the fuel system further comprises: within the set time, if the current of the oil pump is equal to 0, outputting a fault alarm signal of an oil pump line; if the current of the oil pump is equal to or greater than the locked-rotor current of the oil pump, outputting an oil pump locked-rotor alarm signal; and if the current of the oil pump is equal to or greater than the rated working current of the oil pump and less than the oil pump stalling current, outputting a fuel fine filter stalling alarm signal.
According to one embodiment of the invention, the pre-checking operation of the fuel system further comprises: acquiring oil pressure in the pipeline after the set time is reached; judging whether the oil pressure in the pipeline is equal to or greater than a calibrated oil supply pressure of the fuel system, wherein the calibrated oil supply pressure is equal to or less than a rated oil supply pressure of the fuel system; if not, outputting a fuel pipeline leakage alarm signal.
According to one embodiment of the invention, the starting self-test operation of the fuel system comprises the following steps: providing working voltage for the oil pump; if the current of the oil pump is equal to 0, outputting an oil pump line fault alarm signal; and/or outputting a pipeline oil pressure abnormity alarm signal if the oil pressure in the pipeline is equal to or less than the designed oil supply pressure of the fuel system; and/or outputting a starting abnormal fault alarm signal if the vehicle is not started normally.
According to one embodiment of the invention, the performing a driving self-test operation on the fuel system comprises: judging whether the oil pressure in the pipeline is in a set range near the rated oil supply pressure of the fuel system or not; if not, judging whether the current of the oil pump is in a set range near the rated working current of the oil pump; if the oil pressure is within the set range near the rated working current of the oil pump, adjusting the working voltage of the oil pump according to the deviation direction of the oil pressure in the pipeline, and executing the step of judging whether the oil pressure in the pipeline is within the set range near the rated oil supply pressure of the fuel system again; and if the oil pressure is out of the set range near the rated working current of the oil pump, outputting a pipeline oil pressure abnormity alarm signal, and adjusting the working voltage of the oil pump to an upper limit voltage value corresponding to the upper limit value of the set range near the rated working current of the oil pump or to a lower limit voltage value corresponding to the lower limit value of the set range near the rated working current of the oil pump according to the deviation direction of the oil pressure in the pipeline.
According to one embodiment of the invention, the performing a driving self-test operation on the fuel system comprises: acquiring a first resistance between a first end of a liquid level sensor and a sliding sheet, a second resistance between the first end of the liquid level sensor and a second end of the liquid level sensor, and a third resistance between the second end of the liquid level sensor and the sliding sheet; judging whether the sum of the first resistor and the third resistor is equal to the second resistor; if not, outputting a fault alarm signal of the liquid level sensor; if yes, calculating the residual fuel quantity in the fuel tank according to the first resistor and the second resistor, or according to the first resistor and the third resistor, or according to the second resistor and the third resistor.
In order to achieve the above object, a second aspect of the present invention provides a control device for a vehicle fuel system, which includes any one or more of the following three modules:
the fuel system comprises a pre-detection module, a fuel oil control module and a fuel oil control module, wherein the pre-detection module is used for performing pre-detection operation on the fuel oil system before an engine is started;
the starting self-checking module is used for carrying out starting self-checking operation on the fuel system when the engine is started;
and the driving self-checking module is used for carrying out driving self-checking operation on the fuel system after the vehicle is started.
According to the control device of the vehicle fuel system provided by the embodiment of the invention, the working state of the vehicle fuel system is monitored in real time at any one or more moments before the engine is started, when the engine is started and after the vehicle is started, the self-diagnosis of the vehicle fuel system can be realized, the fault of the vehicle fuel system can be found in time, and the safety and the reliability of the vehicle can be effectively ensured.
Drawings
FIG. 1 is a schematic diagram of an application scenario of a control method of a vehicle fuel system according to an embodiment of the invention;
FIG. 2 is a flow chart of a control method of a vehicle fuel system according to one embodiment of the invention;
FIG. 3 is a block diagram of a level sensor according to one embodiment of the present invention;
FIG. 4 is a detailed flow chart of a control method of a vehicle fuel system according to one embodiment of the invention;
FIG. 5 is a flow chart of a control method of a vehicle fuel system according to another embodiment of the invention;
FIG. 6 is a flow chart of a control method of a vehicle fuel system according to another embodiment of the present invention;
FIG. 7 is a detailed flow chart of a control method of a vehicle fuel system according to another embodiment of the invention;
FIG. 8 is a block diagram of a control device for a vehicle fuel system according to one embodiment of the present invention;
fig. 9 is a structural diagram of a vehicle according to one embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.
The following describes a control method and device for a vehicle fuel system according to an embodiment of the invention with reference to the accompanying drawings.
FIG. 1 is a schematic view of an application scenario of a control method of a vehicle fuel system according to an embodiment of the invention. The control method of the vehicle fuel system provided by the embodiment of the invention can be applied to the control system of the vehicle fuel system shown in FIG. 1, and particularly can be applied to the fuel system control module 11 in FIG. 1. As shown in fig. 1, the pressure sensor 12 is used for detecting the oil pressure in the pipeline in the vehicle fuel system in real time and transmitting the oil pressure to the fuel system control module 11; the oil pump 13 is used for realizing a fuel oil delivery function; an Electronic Control Unit (ECU) 14 of the engine is connected to the ignition switch 15, and can acquire an ignition state of the vehicle and transmit the ignition state to the fuel system Control module 11; the combination meter 16 is used for displaying vehicle real-time status information, for example, when a vehicle fuel system fails, a fault signal can be displayed; the liquid level sensor 17 is used for detecting the liquid level of the fuel oil in real time and transmitting the liquid level to the fuel oil system control module 11; the body control module 18 is connected to the door lock sensor 19, and can acquire the opening and closing information of the door lock of the vehicle and transmit the information to the fuel system control module 11. The fuel system control module 11 is the brain of the fuel system operation and self-diagnostics, and its functions may include but are not limited to: the method comprises the steps of monitoring oil supply pressure, monitoring voltage and current of the fuel pump, adaptively adjusting oil supply performance, collecting parameters of a liquid level sensor, analyzing the volume of fuel in the fuel tank according to the parameters of the liquid level sensor, analyzing system abnormity, generating fault codes, outputting alarm signals in an interactive mode with associated parts outside the system and the like.
FIG. 2 is a flow chart of a control method of a vehicle fuel system according to an embodiment of the invention, which can be applied to the fuel system control module in FIG. 1, as shown in FIG. 2, and includes any one or combination of three steps:
and S101, performing a pre-check operation on the fuel system before starting the engine.
And S102, when the engine is started, performing starting self-checking operation on the fuel system.
And S103, after the vehicle is started, performing driving self-checking operation on the fuel system.
In the embodiment of the invention, the control method of the vehicle fuel system comprises any one or more of the combination of the 3 steps, namely, the fuel system is subjected to a pre-detection operation before the engine is started; and/or, when the engine is started, performing starting self-checking operation on the fuel system; and/or after the vehicle is started, performing driving self-checking operation on the fuel system. As a possible implementation manner, the pre-check operation, the start-up self-check operation, and the driving self-check operation may be specifically real-time monitoring of the operating state of the fuel system, for example, the oil pressure in a pipeline in the vehicle fuel system may be detected in real time by a pressure sensor as shown in fig. 1, and compared with the minimum pressure that can be monitored by the pressure sensor, the rated fuel supply pressure of the fuel system, and the calibrated fuel supply pressure; the fuel level may be detected in real time by a level sensor as shown in FIG. 1; the amount of fuel remaining in the fuel tank can be calculated by a fuel system control module as shown in fig. 1 according to the fuel level and compared with a preset low fuel threshold; the oil pump current can be detected by a fuel system control module as shown in fig. 1 and compared with the oil pump stalling current and the oil pump rated working current; whether the vehicle is in a started state can be detected in real time by the engine ECU shown in fig. 1. The working state of the vehicle fuel system is monitored in real time at any one or more moments before the engine is started, when the engine is started and after the vehicle is started, self-diagnosis of the vehicle fuel system can be realized, faults of the vehicle fuel system can be found in time, and safety and reliability of the vehicle are effectively guaranteed.
In order to improve the success rate of one-time starting of a vehicle engine, the fuel system is an effective measure for pre-building pressure, the pre-building pressure mainly means that after the vehicle is placed for a long time, the pressure in an oil supply pipeline is attenuated, and air resistance is locally generated, at the moment, the residual fuel pressure of the pipeline can be improved through the short-time work of an oil pump in advance, the air resistance pipe section is shortened, and fuel is timely provided for starting the engine. The pre-build pressure can improve the starting performance of the engine, and is also an excellent time for self-checking of the fuel system, and the engine does not work at this time, so that the influence of fuel consumption on the detection of the fuel system is reduced, and the diagnosis precision is high, so that the control method of the vehicle fuel system in the embodiment of the invention, the step S101 of performing the pre-check operation on the fuel system, can comprise the following steps:
and providing working voltage for the oil pump for set time.
In the embodiment of the invention, before the engine is started, the working voltage is provided for the oil pump for setting time, so that the oil pump works in advance for a short time, the residual fuel pressure of a pipeline is improved, the air resistance pipe section is shortened, and fuel is provided for the engine to be started in time.
The control method of the vehicle fuel system provided by the embodiment of the invention comprises any one or more of the following three steps: performing pre-inspection operation on a fuel system before starting an engine; when the engine is started, starting self-checking operation is carried out on the fuel system; after the vehicle is started, the fuel system is subjected to driving self-checking operation. The working state of the vehicle fuel system is monitored in real time at any one or more moments before the engine is started, when the engine is started and after the vehicle is started, the self-diagnosis of the vehicle fuel system can be realized, the fault of the vehicle fuel system can be found in time, and the safety and the reliability of the vehicle can be effectively ensured.
Further, the method for controlling a fuel system of a vehicle may further include, before the step of providing the operating voltage setting time for the oil pump, the step of performing a pre-check operation on the fuel system in step S101, the step of:
acquiring residual oil pressure P0 of a pipeline; judging whether the pipeline residual oil pressure P0 is equal to or greater than the minimum pressure P1 which can be monitored by the pressure sensor and is equal to or less than the rated oil supply pressure P2 of the fuel system; if not, outputting a pressure sensor fault alarm signal.
In the embodiment of the invention, before the engine is started, the pressure sensor shown in fig. 1 is used for detecting the residual oil pressure P0 of the pipeline, and the P0 is compared with the minimum pressure P1 which can be monitored by the pressure sensor and the rated oil supply pressure P2 of the fuel system, if the P0 is less than the P1 or the P0 is more than the P2, the pressure sensor is indicated to have a fault at the moment, and a fault alarm signal of the pressure sensor is output, so that the safety and the reliability of a vehicle are ensured.
Further, the method for controlling a fuel system of a vehicle may further include, before the step of providing the operating voltage setting time for the oil pump, the step of performing a pre-test operation on the fuel system in S101, the step of:
acquiring a first resistor R1 between a first end of the liquid level sensor and the slide sheet, a second resistor R2 between the first end of the liquid level sensor and a second end of the liquid level sensor, and a third resistor R3 between the second end of the liquid level sensor and the slide sheet; judging whether the sum of the first resistor R1 and the third resistor R3 is equal to the second resistor R2 or not; if not, a fault alarm signal of the liquid level sensor is output.
In the embodiment of the present invention, the liquid level sensor may specifically be a potential type liquid level sensor as shown in fig. 3, a first resistor R1 between the first end 2 and the sliding piece 1, a second resistor R2 between the first end 2 of the liquid level sensor and the second end 3 of the liquid level sensor, and a third resistor R3 between the second end 3 of the liquid level sensor and the sliding piece 1 may be obtained through the liquid level sensor, and then it is determined whether R1+ R3 is equal to R2, if R1+ R3 ≠ R2, it is determined that the liquid level sensor may have a fault, and a fault alarm signal of the liquid level sensor is output, so as to ensure safety and reliability of the vehicle.
Further, the method for controlling a fuel system of a vehicle may further include, before the step of providing the operating voltage setting time for the oil pump, the step of performing a pre-check operation on the fuel system in step S101, the step of:
if the sum of the first resistor R1 and the third resistor R3 is equal to the second resistor R2, calculating the residual fuel quantity L0 in the oil tank according to the first resistor R1 and the second resistor R2, or according to the first resistor R1 and the third resistor R3, or according to the second resistor R2 and the third resistor R3; judging whether the residual fuel quantity in the fuel tank is larger than a preset low fuel quantity threshold value L1 or not; and if the oil quantity is equal to or less than the low oil quantity threshold value L1, outputting a low oil quantity alarm signal.
In the embodiment of the invention, a low fuel quantity threshold value L1 can be preset, wherein L1 can be a critical value that the fuel quantity in the fuel tank is too low, and when the residual fuel quantity in the fuel tank is less than L1, the fuel quantity of the vehicle is too low, and the vehicle cannot run normally. If R1+ R3= R2, the liquid level sensor can work normally, the detected fuel quantity and liquid level are accurate, the fuel system control module shown in FIG. 1 can be used for calculating the residual fuel quantity L0 in the mailbox according to R1 and R2, or R1 and R3, or R2 and R3, and comparing the L0 with a preset low fuel quantity threshold value L1, if L0 is less than or equal to L1, the situation that the residual fuel quantity in the vehicle fuel tank is too low at the moment is indicated, the vehicle cannot run normally, and a low fuel quantity alarm signal is output, so that the safety and the reliability of the vehicle are ensured.
Further, the method for controlling a fuel system of a vehicle, in the step S101, "performing a pre-check operation on the fuel system", may further include:
within a set time, if the current I0 of the oil pump is equal to 0, outputting an oil pump line fault alarm signal; if the current I0 of the oil pump is equal to or greater than the oil pump locked-rotor current Imax, outputting an oil pump locked-rotor alarm signal; and if the current I0 of the oil pump is equal to or greater than the rated working current Ie of the oil pump and is less than the oil pump stalling current Imax, outputting a fuel fine filter stalling alarm signal.
In the embodiment of the invention, in the set time for providing the working voltage for the oil pump, the fuel system control module shown in fig. 1 can be used for detecting the current I0 of the oil pump in the set time, and comparing the I0 with 0, the oil pump stalling current Imax and the oil pump rated working current Ie, wherein Ie is less than Imax. If I0=0, it is indicated that the oil pump line may have a fault at this time, and a fault alarm signal of the oil pump line is output, so that the safety and reliability of the vehicle are ensured; if I0 is larger than or equal to Imax, the oil pump stalling alarm signal is output under the stalling condition, so that the safety and reliability of the vehicle are ensured; if the Ie is less than or equal to I0 and less than Imax, the situation that the fuel fine filter of the oil pump is possibly blocked is indicated, and a blocking alarm signal of the fuel fine filter is output, so that the safety and the reliability of the vehicle are ensured.
Further, the method for controlling a fuel system of a vehicle, in the step S101, "performing a pre-check operation on the fuel system", may further include:
acquiring oil pressure P4 in the pipeline after the set time is reached; judging whether the oil pressure P4 in the pipeline is equal to or greater than the calibrated oil supply pressure P3 of the fuel system or not, wherein the calibrated oil supply pressure P3 is equal to or less than the rated oil supply pressure P2 of the fuel system; if not, outputting a fuel pipeline leakage alarm signal.
In the embodiment of the invention, after the working voltage provided for the oil pump reaches the set time, the pressure sensor shown in fig. 1 is used for detecting the oil pressure P4 in the pipeline, and the P4 is compared with the calibrated oil supply pressure P3 of the fuel system, wherein the P3 is less than or equal to P2. If P4 is less than P3, the oil pressure P4 in the pipeline does not reach the calibrated oil supply pressure of the fuel system, the fuel pipeline is likely to leak, and a fuel pipeline leakage alarm signal is output, so that the safety and the reliability of the vehicle are ensured.
For clarity of the embodiment, a control method of a vehicle fuel system according to an embodiment of the present invention is described in detail below with reference to fig. 4, where fig. 4 is a specific flowchart of the control method of the vehicle fuel system according to an embodiment of the present invention, and as shown in fig. 4, the control method of the vehicle fuel system, which performs a pre-check operation on the fuel system, may specifically include:
s201, acquiring a pipeline residual oil pressure P0.
S202, judging whether P1 is more than or equal to P0 and more than or equal to P2.
If yes, go to step S204; if not, the process proceeds to step S203.
And S203, outputting a pressure sensor fault alarm signal.
S204, a first resistor R1 between the first end of the liquid level sensor and the slide sheet, a second resistor R2 between the first end of the liquid level sensor and the second end of the liquid level sensor, and a third resistor R3 between the second end of the liquid level sensor and the slide sheet are obtained.
S205, it is determined whether R1+ R3= R2.
If yes, go to step S207; if not, the process proceeds to step S206.
And S206, outputting a fault alarm signal of the liquid level sensor.
And S207, calculating the residual oil quantity L0 in the mailbox according to the R1 and the R2, or the R1 and the R3, or the R2 and the R3.
S208, judging whether L0 is less than or equal to L1.
If yes, go to step S209; if not, the process proceeds to step S210.
And S209, outputting a low oil alarm signal.
And S210, providing working voltage for the oil pump for setting time.
S211, obtains an oil pump current I0.
S212, determine whether I0=0.
If yes, go to step S213; if not, the process proceeds to step S214.
And S213, outputting an oil pump line fault alarm signal.
S214, judging whether I0 is larger than or equal to Imax.
If yes, go to step S215; if not, the process proceeds to step S216.
And S215, outputting an oil pump locked-rotor alarm signal.
S216, judging whether Ie is less than or equal to I0 and less than Imax.
If yes, go to step S217; if not, the process proceeds to step S218.
And S217, outputting a fuel fine filter blockage alarm signal.
S218, the oil pressure P4 in the pipeline is obtained.
S219, judging whether P4 is less than P3.
If yes, go to step S220; if not, the process proceeds to step S221.
And S220, outputting a fuel pipeline leakage alarm signal.
And S221, enabling the fuel system of the vehicle to be normal.
According to the control method of the vehicle fuel system, the fuel system is subjected to pre-detection operation before the engine is started. The working state of the vehicle fuel system is monitored in real time before the engine is started, self-diagnosis of the vehicle fuel system can be realized, faults of the vehicle fuel system can be found in time, an alarm is given, and safety and reliability of a vehicle are effectively guaranteed.
The starting self-checking operation is mainly to monitor whether each component of the fuel system works normally when the engine is started, and perform fuel fault diagnosis for the problems that the vehicle cannot be started and the like, so that the problem early warning and troubleshooting are facilitated, therefore, as shown in fig. 5, fig. 5 is a flow chart of a control method of a vehicle fuel system according to another embodiment of the invention, and the control method of the vehicle fuel system performs the starting self-checking operation on the fuel system, and may include:
and S301, providing working voltage for the oil pump.
In the embodiment of the invention, when the engine is started, the working voltage is provided for the oil pump, so that the oil pump can realize the fuel oil conveying function.
S302, if the current I0 of the oil pump is equal to 0, outputting a fault alarm signal of an oil pump line; and/or outputting a pipeline oil pressure abnormity alarm signal if the oil pressure P4 in the pipeline is equal to or less than the designed oil supply pressure P5 of the fuel system; and/or outputting a starting abnormal fault alarm signal if the vehicle is not started normally.
In the embodiment of the invention, the current I0 of the oil pump can be detected through the fuel system control module shown in figure 1, if I0=0, the fault of the oil pump line is indicated, and a fault alarm signal of the oil pump line is output to ensure the safety and reliability of a vehicle; and/or, the oil pressure P4 in the pipeline can be detected through a pressure sensor shown in figure 1, the P4 is compared with the designed oil supply pressure P5 of the fuel system, if the P4 is less than or equal to the P5, the oil pressure of the output pipeline is possibly abnormal, and an alarm signal for the abnormal oil pressure of the output pipeline is output, so that the safety and the reliability of the vehicle are ensured; and/or, whether the vehicle is started or not can be acquired through the engine ECU shown in fig. 1, and if the vehicle is not normally started, a starting abnormal fault alarm signal is output, so that the safety and reliability of the vehicle are ensured.
According to the control method of the vehicle fuel system provided by the embodiment of the invention, when the engine is started, the fuel system is subjected to starting self-checking operation. When the engine is started, the working state of the vehicle fuel system is monitored in real time, self diagnosis of the vehicle fuel system can be realized, faults of the vehicle fuel system can be found in time, an alarm is given, and safety and reliability of a vehicle are effectively guaranteed.
The driving self-check includes monitoring the state of the liquid level sensor, detecting the fuel amount in the fuel tank, monitoring the state of the oil pressure sensor, monitoring the working state of the oil pump, etc. therefore, as shown in fig. 6, fig. 6 is a flowchart of a control method of a vehicle fuel system according to another embodiment of the present invention, and the control method of the vehicle fuel system performs the driving self-check operation on the fuel system, and may include:
s401, whether the oil pressure P4 in the pipeline is in a set range near the rated oil supply pressure P2 of the fuel system is judged.
In the embodiment of the present invention, a setting range near P2 may be preset, where the setting range may be a critical range where the oil pressure in the pipeline is normal oil pressure, P4 is a normal oil pressure range when P4 is within the setting range of P2, and P4 is an abnormal oil pressure range when P4 is outside the setting range of P2. The in-line oil pressure P4 may be detected in real time by a pressure sensor as shown in fig. 1, and it is determined whether P4 is within a set range (i.e., a normal oil pressure range) around the rated supply pressure P2 of the fuel system.
And S402, if not, judging whether the current I0 of the oil pump is in a set range near the rated working current Ie of the oil pump.
In the embodiment of the present invention, a setting range near Ie may be preset, where the setting range may be a critical range where the current of the oil pump is a normal current, I0 is a normal current range when I0 is within the setting range of Ie, and I0 is an abnormal current range when I0 is outside the setting range of Ie. If P4 is not in the set range near the rated fuel supply pressure P2 of the fuel system, the current I0 of the oil pump can be detected by the fuel system control module shown in FIG. 1, and whether the current I0 of the oil pump is in the set range (i.e. normal current range) near the rated operating current Ie of the oil pump can be judged.
And S403, if the oil pump is positioned in the set range near the rated operating current Ie of the oil pump, adjusting the operating voltage of the oil pump according to the deviation direction of the oil pressure P4 in the pipeline, and re-executing the step of judging whether the oil pressure P4 in the pipeline is positioned in the set range near the rated oil supply pressure P2 of the fuel system.
In the embodiment of the present invention, if I0 is within the set range near Ie, it indicates that the operating current of the oil pump is within the normal operating current range at this time, and the operating voltage of the oil pump is adjusted according to the deviation direction of the in-line oil pressure P4, so that the in-line oil pressure P4 is restored to the set range near P2 (i.e., the normal oil pressure range). The process returns to step S401 to monitor the oil pressure P4 in the road in real time.
And S404, if the oil pump is out of the set range near the rated operating current Ie of the oil pump, outputting a pipeline oil pressure abnormity alarm signal, and adjusting the operating voltage of the oil pump to an upper limit voltage value corresponding to the upper limit value of the set range near the rated operating current Ie of the oil pump or to a lower limit voltage value corresponding to the lower limit value of the set range near the rated operating current Ie of the oil pump according to the deviation direction of the oil pressure P4 in the pipeline.
In the embodiment of the invention, if I0 is not in the set range near Ie, the working current of the oil pump is in the abnormal working current range at the moment, a pipeline oil pressure abnormal alarm signal is output, the safety and the reliability of the vehicle are ensured, and the working voltage of the oil pump is adjusted to be an upper limit voltage value corresponding to the upper limit value of the set range near the oil pump rated working current Ie or to be a lower limit voltage value corresponding to the lower limit value of the set range near the oil pump rated working current Ie according to the deviation direction of the oil pressure P4 in the pipeline, so that the oil pressure P4 in the pipeline is restored to be in the set range near P2 (namely, the normal oil pressure range).
Further, the control method of the vehicle fuel system performs the driving self-checking operation on the fuel system, and further comprises the following steps:
acquiring a first resistor between a first end of the liquid level sensor and the slide sheet, a second resistor between the first end of the liquid level sensor and a second end of the liquid level sensor, and a third resistor between the second end of the liquid level sensor and the slide sheet; judging whether the sum of the first resistor and the third resistor is equal to the second resistor or not; if not, outputting a fault alarm signal of the liquid level sensor; if yes, calculating the residual fuel quantity in the fuel tank according to the first resistor and the second resistor, or according to the first resistor and the third resistor, or according to the second resistor and the third resistor.
For the detailed description of this step, reference may be made to the description of the relevant contents in the above embodiments, which are not repeated herein.
For clarity of the embodiment, a control method of a vehicle fuel system according to an embodiment of the present invention is described in detail below with reference to fig. 7, where fig. 7 is a specific flowchart of a control method of a vehicle fuel system according to another embodiment of the present invention, and as shown in fig. 7, the control method of a vehicle fuel system, which performs a self-running test operation on the fuel system, may specifically include:
s501, the oil pressure P4 in the pipeline is obtained.
S502, it is determined whether P4 is within the set range around P2.
If yes, go to step S507; if not, the process proceeds to step S503.
S503, obtaining the current I0 of the oil pump.
S504, whether the I0 is positioned near Ie or not is judged.
If yes, go to step S506; if not, the process proceeds to step S505.
And S505, outputting a pipeline oil pressure abnormity alarm signal, and adjusting the working voltage of the oil pump to an upper limit voltage value corresponding to the upper limit value of a set range near the rated working current Ie of the oil pump according to the deviation direction of the oil pressure P4 in the pipeline, or to a lower limit voltage value corresponding to the lower limit value of the set range near the rated working current Ie of the oil pump.
In step S506, the operating voltage of the oil pump is adjusted according to the direction of deviation of the in-line oil pressure P4, and the process returns to step S502.
S507, acquiring a first resistor R1 between the first end of the liquid level sensor and the slide sheet, a second resistor R2 between the first end of the liquid level sensor and the second end of the liquid level sensor, and a third resistor R3 between the second end of the liquid level sensor and the slide sheet.
S508, it is determined whether R1+ R3= R2.
If yes, go to step S509; if not, the process proceeds to step S510.
And S509, calculating the residual oil quantity L0 in the mailbox according to the R1 and the R2, or the R1 and the R3, or the R2 and the R3.
And S510, outputting a fault alarm signal of the liquid level sensor.
According to the control method of the vehicle fuel system provided by the embodiment of the invention, after the vehicle is started, the fuel system is subjected to the driving self-checking operation. After the vehicle is started, the working state of the vehicle fuel system is monitored in real time, self diagnosis of the vehicle fuel system can be realized, faults of the vehicle fuel system can be found in time, an alarm is given, and safety and reliability of the vehicle are effectively guaranteed.
Fig. 8 is a block diagram of a control apparatus of a vehicle fuel system according to an embodiment of the present invention, which includes a combination of any one or more of the following three modules, as shown in fig. 8:
the pre-detection module 21 is used for performing pre-detection operation on the fuel system before the engine is started;
the starting self-checking module 22 is used for carrying out starting self-checking operation on the fuel system when the engine is started;
and the driving self-checking module 23 is used for performing driving self-checking operation on the fuel system after the vehicle is started.
It should be noted that the foregoing explanation of the embodiment of the control method for the vehicle fuel system is also applicable to the control device for the vehicle fuel system of the embodiment, and details are not repeated herein.
According to the control device of the vehicle fuel system provided by the embodiment of the invention, the working state of the vehicle fuel system is monitored in real time at any one or more moments before the engine is started, when the engine is started and after the vehicle is started, the self-diagnosis of the vehicle fuel system can be realized, the fault of the vehicle fuel system can be found in time, and the safety and the reliability of the vehicle can be effectively ensured.
In order to implement the above embodiment, the embodiment of the present invention further provides a vehicle 90, as shown in fig. 9, including a control device 91 of a vehicle fuel system shown in the above embodiment.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (5)
1. A method of controlling a vehicle fuel system, comprising:
performing pre-check operation on the fuel system before starting the engine;
wherein, the pre-checking operation of the fuel system comprises:
providing working voltage for the oil pump for setting time;
before the set time of providing the working voltage for the oil pump, the pre-detection operation is carried out on the fuel system, and the method further comprises the following steps:
acquiring residual oil pressure of a pipeline;
judging whether the pipeline residual oil pressure is equal to or greater than the minimum pressure which can be monitored by a pressure sensor and is equal to or less than the rated oil supply pressure of the fuel system;
if not, outputting a fault alarm signal of the pressure sensor;
if so, acquiring a first resistance between a first end of the liquid level sensor and a slide sheet, a second resistance between the first end of the liquid level sensor and a second end of the liquid level sensor, and a third resistance between the second end of the liquid level sensor and the slide sheet;
judging whether the sum of the first resistor and the third resistor is equal to the second resistor;
if not, outputting a fault alarm signal of the liquid level sensor;
if yes, calculating the amount of the remaining fuel in the fuel tank according to the first resistor and the second resistor, or according to the first resistor and the third resistor, or according to the second resistor and the third resistor;
judging whether the residual fuel quantity in the fuel tank is larger than a preset low fuel quantity threshold value or not;
if the oil quantity is equal to or less than the low oil quantity threshold value, outputting a low oil quantity alarm signal;
if the current of the oil pump is greater than the low oil quantity threshold value, judging whether the current of the oil pump is equal to 0 within the set time, and if the current of the oil pump is equal to 0, outputting an oil pump line fault alarm signal;
if the current of the oil pump is not equal to 0, judging whether the current of the oil pump is equal to or greater than the locked-rotor current of the oil pump, and if the current of the oil pump is equal to or greater than the locked-rotor current of the oil pump, outputting an locked-rotor alarm signal of the oil pump;
if the current of the oil pump is smaller than the locked-rotor current of the oil pump, judging whether the current of the oil pump is equal to or larger than the rated working current of the oil pump,
if the current of the oil pump is equal to or greater than the rated working current of the oil pump and less than the stalling current of the oil pump, outputting a blocking alarm signal of the fuel fine filter;
if the current of the oil pump is less than the rated working current of the oil pump, then
After the set time is reached, acquiring oil pressure in the pipeline;
judging whether the oil pressure in the pipeline is equal to or greater than a calibrated oil supply pressure of the fuel system, wherein the calibrated oil supply pressure is equal to or less than a rated oil supply pressure of the fuel system;
if not, outputting a fuel pipeline leakage alarm signal;
further comprising:
when the engine is started, starting self-checking operation is carried out on the fuel system;
and after the vehicle is started, carrying out driving self-checking operation on the fuel system.
2. The control method of claim 1, wherein the performing a start-up self-test operation on the fuel system comprises:
providing working voltage for the oil pump;
if the current of the oil pump is equal to 0, outputting an oil pump line fault alarm signal; and/or outputting a pipeline oil pressure abnormity alarm signal if the oil pressure in the pipeline is equal to or less than the designed oil supply pressure of the fuel system; and/or outputting a starting abnormal fault alarm signal if the vehicle is not normally started.
3. The control method according to claim 1, wherein the performing a drive self-test operation on the fuel system comprises:
judging whether the oil pressure in the pipeline is within a set range of rated oil supply pressure of the fuel system;
if not, judging whether the current of the oil pump is within the set range of the rated working current of the oil pump;
if the oil pressure is within the set range of the rated working current of the oil pump, adjusting the working voltage of the oil pump according to the deviation direction of the oil pressure in the pipeline, and executing the step of judging whether the oil pressure in the pipeline is within the set range of the rated oil supply pressure of the fuel system again;
and if the oil pressure is out of the set range of the rated working current of the oil pump, outputting a pipeline oil pressure abnormity alarm signal, and adjusting the working voltage of the oil pump to an upper limit voltage value corresponding to the upper limit value of the set range of the rated working current of the oil pump according to the deviation direction of the oil pressure in the pipeline, or to a lower limit voltage value corresponding to the lower limit value of the set range of the rated working current of the oil pump.
4. The control method according to claim 1, wherein the performing a drive self-test operation on the fuel system comprises:
acquiring a first resistance between a first end of a liquid level sensor and a sliding sheet, a second resistance between the first end of the liquid level sensor and a second end of the liquid level sensor, and a third resistance between the second end of the liquid level sensor and the sliding sheet;
judging whether the sum of the first resistor and the third resistor is equal to the second resistor or not;
if not, outputting a fault alarm signal of the liquid level sensor;
if yes, calculating the residual fuel quantity in the fuel tank according to the first resistor and the second resistor, or according to the first resistor and the third resistor, or according to the second resistor and the third resistor.
5. A control device of a vehicle fuel system for performing a control method of the vehicle fuel system according to any one of claims 1 to 4, characterized by comprising a combination of any one or more of the following three modules:
the fuel system comprises a pre-detection module, a fuel oil control module and a fuel oil control module, wherein the pre-detection module is used for performing pre-detection operation on the fuel oil system before an engine is started;
the starting self-checking module is used for carrying out starting self-checking operation on the fuel system when the engine is started;
the driving self-checking module is used for carrying out driving self-checking operation on the fuel system after the vehicle is started;
the pre-detection operation is carried out on the fuel system, and the method further comprises the following steps:
acquiring residual oil pressure of a pipeline;
judging whether the pipeline residual oil pressure is equal to or greater than the minimum pressure which can be monitored by a pressure sensor and is equal to or less than the rated oil supply pressure of the fuel system;
if not, outputting a pressure sensor fault alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811311137.3A CN111140390B (en) | 2018-11-06 | 2018-11-06 | Control method and device for vehicle fuel system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811311137.3A CN111140390B (en) | 2018-11-06 | 2018-11-06 | Control method and device for vehicle fuel system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111140390A CN111140390A (en) | 2020-05-12 |
| CN111140390B true CN111140390B (en) | 2022-12-23 |
Family
ID=70516403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811311137.3A Active CN111140390B (en) | 2018-11-06 | 2018-11-06 | Control method and device for vehicle fuel system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111140390B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720231B (en) * | 2020-05-26 | 2021-07-23 | 东风汽车集团有限公司 | Method and system for post-processing fault of engine oil rail pressure sensor |
| CN112012861B (en) * | 2020-08-28 | 2022-06-17 | 深圳拓邦股份有限公司 | Engine control method and device of mower and mower |
| CN112477841A (en) * | 2020-12-11 | 2021-03-12 | 湖北航天技术研究院特种车辆技术中心 | System and method for remotely controlling heavy vehicle |
| CN113530696B (en) * | 2021-08-04 | 2023-04-07 | 亚普汽车部件股份有限公司 | Fuel system of automobile and leakage detection method of fuel system |
| CN114810385B (en) * | 2022-03-28 | 2023-03-21 | 东风汽车股份有限公司 | Fuel system exhaust method for first starting of light diesel vehicle |
| CN115431954B (en) * | 2022-09-16 | 2024-02-27 | 广州汽车集团股份有限公司 | Control method, device, terminal and medium of hybrid electric vehicle |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006026639A1 (en) * | 2006-06-08 | 2007-12-13 | Robert Bosch Gmbh | Method for checking the function of a component of a fuel injection system |
| CN200941061Y (en) * | 2006-08-29 | 2007-08-29 | 刘文帅 | Oil gage of autocar fuel tank |
| JP2009092027A (en) * | 2007-10-11 | 2009-04-30 | Yamaha Motor Co Ltd | Malfunction detecting device for fuel pump |
| CN102095588A (en) * | 2010-12-28 | 2011-06-15 | 中国人民解放军军事交通学院 | Intelligent fault diagnosis method for diesel engine |
| US9316558B2 (en) * | 2013-06-04 | 2016-04-19 | GM Global Technology Operations LLC | System and method to diagnose fuel system pressure sensor |
| CN104454186B (en) * | 2014-10-27 | 2017-01-11 | 奇瑞汽车股份有限公司 | Vehicle double-fuel system oil pump control method |
| CN106224108A (en) * | 2016-08-29 | 2016-12-14 | 重庆隆鑫机车有限公司 | Engine electric spray executor's self checking method and system |
-
2018
- 2018-11-06 CN CN201811311137.3A patent/CN111140390B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111140390A (en) | 2020-05-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111140390B (en) | Control method and device for vehicle fuel system | |
| CN106896274B (en) | Apparatus, system and method for insulation resistance measurement and insulation loss diagnosis | |
| US6970807B2 (en) | Diagnostic system and method for electric leak detecting device | |
| US9194918B2 (en) | Leakage detection circuit with integral circuit robustness check | |
| US9411004B2 (en) | Continuous leakage detection circuit with integrated robustness check and balanced fault detection | |
| CN103250061A (en) | Insulation resistance measurement circuit having self-est function without generating leakage current | |
| CN101391605A (en) | Brake booster leak detection system | |
| US8650003B2 (en) | Validation process for fault detection of a device | |
| CN107472029A (en) | The high voltage fault detection method and vehicle of vehicle | |
| US20160217628A1 (en) | Method and apparatus for on-board/off-board fault detection | |
| CN111751686A (en) | Method and device for detecting insulation fault of electric automobile | |
| US8770015B2 (en) | Fault isolation in electronic returnless fuel system | |
| US6208917B1 (en) | Ambient temperature/inlet air temperature sensor dither | |
| KR20200014837A (en) | Maintenance system | |
| US8972099B2 (en) | Method and apparatus for on-board/off-board fault detection | |
| CN113551856B (en) | Off-line detection method for pipeline leakage of fuel vehicle | |
| US11746680B2 (en) | System for monitoring an engine | |
| US7997127B2 (en) | Electric fuel pump testing method and apparatus | |
| CN104266804B (en) | Security detection system and method for gas supply system of dual-fuel automobile | |
| US8225646B2 (en) | Throttle body sweep diagnostic system and method | |
| KR100475678B1 (en) | Method for detecting error of pressure sensor for lpg injection apparatus | |
| CN110778406A (en) | Method for predicting failure of fuel injector of vehicle | |
| US7233151B2 (en) | Apparatus and method for diagnosing failure of fuel level sensors | |
| CN107882816B (en) | Fault diagnosis and fault tolerance method and system for hydraulic control system of automatic gearbox | |
| DE102012222930B4 (en) | Detection of systematic errors in sensors for an electronic fuel system without return |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |