High-pressure common-rail fuel system diagnosis method and device, electronic equipment and storage medium

Abstract

The invention relates to a high-pressure common-rail fuel system diagnosis method and device, electronic equipment and a storage medium, and belongs to the technical field of high-pressure common-rail fuel system diagnos.The method comprises the steps that operation data of a high-pressure common-rail fuel system in the operation process is obtained; the operation data comprises actual rail pressure, first target rail pressure and second target rail pressure; the actual rail pressure is controlled to be increased to the first target rail pressure, the pressure increasing duration is obtained, and the pressure increasing duration serves as the pressure building time; the actual rail pressure is controlled to be reduced from the first target rail pressure to the second target rail pressure, the pressure reduction duration is obtained, and the pressure reduction duration serves as pressure relief time; therefore, the high-pressure common-rail fuel system can be diagnosed according to the pressure buildup time and the pressure relief time after the high-pressure common-rail fuel system is integrally pressurized and depressurized, so that the diagnosis process of the high-pressure common-rail fuel system is convenient and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of high-pressure common rail system diagnosis, and in particular to a high-pressure common rail fuel system diagnosis method, device, electronic equipment and storage medium. Background Art

[0002] With the continuous upgrading of emission regulations, the accuracy and requirements of diesel engine control systems are constantly improving; and the electronically controlled high-pressure common rail system is a set of fuel system control devices currently widely used in the field of diesel engine control. The system can not only achieve a higher injection pressure, but also independently and flexibly control the injection timing and injection pulse width, so that it can achieve the ideal working conditions and ideal injection effect of diesel combustion under different working conditions, while reducing emissions, greatly improving fuel economy and engine power performance. The high-pressure common rail system of the diesel engine is used to control the injection pressure. It can achieve a higher injection pressure and stable pressure control is the key to ensure the accuracy of the injection amount and optimize combustion. In rail pressure control, it is necessary to comprehensively consider factors such as the pumping of the high-pressure oil pump, the injection of oil into the cylinder by the injector, the dynamic leakage of the injector during operation, and the static leakage of the entire high-pressure system. If the engine is running abnormally, it is necessary to locate and analyze the cause of the problem. It is usually necessary to check whether the high-pressure common rail fuel system is abnormal.

[0003] The detection methods in the prior art generally involve measuring with the aid of external tools and testing of individual components. The operation is not easy when measuring with the aid of external tools. Although accurate measurement data can be obtained by using precise measuring instruments, it is not convenient to disassemble and test the assembled engine, and there is no need to measure quantitative values ​​when troubleshooting. The detection method for individual components does not take the overall situation into consideration, and it is impossible to roughly orient and eliminate the overall system, resulting in the problem that the diagnosis of the high-pressure common rail fuel system is not convenient and efficient enough.

[0004] Therefore, it is urgent to propose a high-pressure common rail fuel system diagnostic method, device, electronic equipment and storage medium to solve the technical problem that the high-pressure common rail fuel system detection method in the prior art cannot roughly orient and eliminate the overall system, resulting in the diagnosis of the high-pressure common rail fuel system being inconvenient and inefficient. Summary of the invention

[0005] In view of this, it is necessary to provide a high-pressure common rail fuel system diagnostic method, device, electronic device and storage medium to solve the technical problem that the high-pressure common rail fuel system detection method in the prior art cannot roughly orient and eliminate the overall system, resulting in the diagnosis of the high-pressure common rail fuel system being inconvenient and inefficient.

[0006] In order to solve the above problems, the present invention provides a high-pressure common rail fuel system diagnosis method, comprising: Acquiring operation data of the high-pressure common rail fuel system during operation; the operation data includes an actual rail pressure, a first target rail pressure, and a second target rail pressure; controlling the actual rail pressure to be boosted to the first target rail pressure, and obtaining a boosting time, and using the boosting time as a pressure building time; controlling the actual rail pressure to decrease from the first target rail pressure to the second target rail pressure, and obtaining a pressure reduction time, and using the pressure reduction time as a pressure relief time; The high-pressure common rail fuel system is diagnosed according to the pressure building time and the pressure releasing time to obtain a diagnosis result.

[0007] In a possible implementation, the operating data further includes a third target rail pressure, and the third target rail pressure is less than the first target rail pressure; after obtaining the operating data of the high-pressure common rail fuel system during operation, the method further includes: The actual rail pressure is controlled to be adjusted to the third target rail pressure to obtain an adjusted actual rail pressure.

[0008] In a possible implementation, the controlling the actual rail pressure to increase to the first target rail pressure includes: Setting a preset change range and a required value; the required value is the same as the value of the actual rail pressure; Controlling the demand value to be boosted to the first target rail pressure according to the preset variation range; The actual rail pressure is controlled to be increased to the first target rail pressure according to a pressure increase process of the demand value.

[0009] In a possible implementation, the controlling the actual rail pressure to drop from the first target rail pressure to the second target rail pressure, and obtaining a pressure drop time, and using the pressure drop time as a pressure relief time, further includes: Determining whether the actual rail pressure of the engine meets a first preset condition; If so, the actual rail pressure is controlled to be reduced from the first target rail pressure to the second target rail pressure, and the pressure reduction time is obtained, and the pressure reduction time is used as the pressure relief time.

[0010] In a possible implementation, the controlling the actual rail pressure to drop from the first target rail pressure to the second target rail pressure, and obtaining a pressure drop time, and using the pressure drop time as a pressure relief time, further includes: Determining whether the actual rail pressure of the engine meets a second preset condition; If yes, diagnose the high pressure common rail fuel system according to the pressure build-up time and the pressure release time to obtain a diagnosis result; If not, the operating data is updated according to the high pressure common rail fuel system, and a diagnosis is performed according to the updated data to obtain a diagnosis result.

[0011] In a possible implementation, the diagnosing the high pressure common rail fuel system according to the pressure build-up time and the pressure relief time to obtain a diagnosis result includes: Determine whether the pressure build-up time and the pressure relief time are both within a preset normal range: If yes, determining that the diagnosis result of the high pressure common rail fuel system is normal; If not, it is determined that the diagnosis result of the high-pressure common rail fuel system is abnormal, and the pressure build-up time and the pressure release time are judged respectively to obtain an abnormal diagnosis result of the high-pressure common rail fuel system.

[0012] In a possible implementation, the respectively judging the pressure building time and the pressure releasing time to obtain the abnormality diagnosis result of the high pressure common rail fuel system includes: When the pressure relief time is less than the preset normal range, and the pressure build-up time is greater than the preset normal range, it is determined that the abnormal diagnosis result of the high-pressure common rail fuel system is an abnormal leakage or a problem at the fuel inlet end; When the pressure relief time is less than the preset normal range, and the pressure build-up time is not greater than the preset normal range, determining that the abnormal diagnosis result of the high-pressure common rail fuel system is an abnormal leakage; When the pressure relief time is not less than the preset normal range, and the pressure build-up time is greater than the preset normal range, it is determined that the abnormal diagnosis result of the high-pressure common rail fuel system is a problem at the fuel inlet end; When the pressure relief time is greater than the preset normal range, it is determined that the abnormal diagnosis result of the high-pressure common rail fuel system is that the oil pump oil inlet characteristic is offset.

[0013] On the other hand, the present invention also provides a high-pressure common rail fuel system diagnostic device, comprising: A data acquisition module, used to acquire operating data of the high-pressure common rail fuel system during operation; the operating data includes an actual rail pressure, a first target rail pressure, and a second target rail pressure; A rail pressure boosting module, used to control the actual rail pressure to be boosted to the first target rail pressure, and obtain a boosting time, and use the boosting time as a pressure building time; a rail pressure relief module, used for controlling the actual rail pressure to drop from the first target rail pressure to the second target rail pressure, and obtaining a pressure drop time, and using the pressure drop time as a pressure relief time; The result determination module is used to diagnose the high-pressure common rail fuel system according to the pressure building time and the pressure relief time to obtain a diagnosis result.

[0014] On the other hand, an embodiment of the present invention discloses an electronic device, including: a processor, a memory, and a computer program stored in the memory and capable of running on the processor, and when the computer program is executed by the processor, each step of the above-mentioned high-pressure common rail fuel system diagnostic method embodiment is implemented.

[0015] On the other hand, an embodiment of the present invention discloses a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, each step of the above-mentioned high-pressure common rail fuel system diagnostic method embodiment is implemented.

[0016] The beneficial effects of the present invention are as follows: obtaining operation data of a high-pressure common rail fuel system during operation; the operation data includes an actual rail pressure, a first target rail pressure, and a second target rail pressure; controlling the actual rail pressure to increase to the first target rail pressure, and obtaining a pressure increase time, and using the pressure increase time as a pressure building time; controlling the actual rail pressure to decrease from the first target rail pressure to the second target rail pressure, and obtaining a pressure reduction time, and using the pressure reduction time as a pressure relief time; thereby, after the high-pressure common rail fuel system is pressure-increased and pressure-reduced as a whole, the high-pressure common rail fuel system can be diagnosed as a whole according to the pressure building time and the pressure relief time, so that the diagnosis process of the high-pressure common rail fuel system is convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic flow chart of an embodiment of a high-pressure common rail fuel system diagnostic method provided by the present invention; Figure 2 For the present invention Figure 1 A schematic flow chart of an embodiment of step S102; Figure 3 For the present invention Figure 1 A schematic diagram of an embodiment flow chart after step S103; Figure 4 For the present invention Figure 1 A schematic flow chart of an embodiment of step S104; Figure 5 A schematic structural diagram of an embodiment of a high-pressure common rail fuel system diagnostic device provided by the present invention; Figure 6 A schematic structural diagram of an embodiment of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0019] like Figure 1 As shown, a specific embodiment of the present invention discloses a high-pressure common rail fuel system diagnosis method, comprising: S101, obtaining operation data of the high-pressure common rail fuel system during operation; the operation data includes an actual rail pressure, a first target rail pressure, and a second target rail pressure; S102, controlling the actual rail pressure to increase to the first target rail pressure, and obtaining the pressure increase duration, and using the pressure increase duration as the pressure building time; S103, controlling the actual rail pressure to drop from the first target rail pressure to the second target rail pressure, and obtaining the pressure drop time, and using the pressure drop time as the pressure relief time; S104: diagnose the high-pressure common rail fuel system according to the pressure build-up time and the pressure release time to obtain a diagnosis result.

[0020] It should be understood that the common rail fuel system (Common Rail) is an advanced diesel engine fuel supply system that delivers high-pressure fuel to the common fuel supply pipe (Rail) through a high-pressure fuel pump, and then accurately controls the injection amount and injection timing through the electronic control unit (ECU), thereby achieving efficient and environmentally friendly fuel injection.

[0021] In summary, the high-pressure common rail fuel system significantly improves the performance, efficiency and environmental friendliness of diesel engines through its advanced working principles and characteristics, and is one of the important technologies in modern automobile engines.

[0022] It should be understood that the operation data of the high-pressure common rail fuel system during operation obtained in step S101 may be obtained according to equipment or sensors in various parts, and the specific acquisition method may be set according to actual conditions.

[0023] In a specific embodiment of the present invention, the operation data may include a target speed, an injection pressure, an actual rail pressure, a first target rail pressure, and a second target rail pressure, wherein the target speed indicates that the engine operates at a fixed speed, and steps S101-S103 are all performed at the target speed. If the injection pressure is too small, the engine may not be able to maintain the target speed, affecting the diagnosis of the rail pressure. Therefore, the first target rail pressure, the second target rail pressure, and the third target rail pressure cannot be set too small. The specific values ​​of the first target rail pressure and the second target rail pressure can be set according to actual conditions, and the embodiment of the present invention is not limited here, wherein the first target rail pressure can be a high pressure state. The first target rail pressure is greater than the second target rail pressure. Then the engine can be controlled to increase the actual rail pressure to the first target rail pressure, so that the pressure build-up time from the actual rail pressure to the first target rail pressure can be obtained; the actual rail pressure of the engine can also be controlled to drop from the first target rail pressure to the second target rail pressure, so that the pressure relief time from the first target rail pressure to the second target rail pressure can be obtained; then the high pressure common rail fuel system can be diagnosed according to the pressure build-up time and the pressure relief time to obtain a diagnosis result.

[0024] Compared with the prior art, the present embodiment provides a method for obtaining operation data of a high-pressure common rail fuel system during operation; the operation data includes an actual rail pressure, a first target rail pressure, and a second target rail pressure; the actual rail pressure is controlled to be increased to the first target rail pressure, and a pressure increase time is obtained, and the pressure increase time is used as a pressure building time; the actual rail pressure is controlled to be reduced from the first target rail pressure to the second target rail pressure, and a pressure reduction time is obtained, and the pressure reduction time is used as a pressure relief time; thus, after the high-pressure common rail fuel system is pressure-increased and pressure-reduced as a whole, the high-pressure common rail fuel system can be diagnosed as a whole according to the pressure building time and the pressure relief time, so that the diagnosis process of the high-pressure common rail fuel system is convenient and efficient.

[0025] In some embodiments of the present invention, the operation data further includes a third target rail pressure, and the third target rail pressure is less than the first target rail pressure; after step S101, the following steps are further included: The actual rail pressure is controlled to be adjusted to the third target rail pressure to obtain the adjusted actual rail pressure.

[0026] In a specific embodiment of the present invention, the operating data may further include a third target rail pressure, the third target rail pressure is less than the first target rail pressure, the third target rail pressure is in a low pressure state, and the specific values ​​of the first target rail pressure and the third target rail pressure are not limited. After obtaining the operating data of the high-pressure common rail fuel system during operation, the engine is controlled to adjust the actual rail pressure according to the third target rail pressure. The adjustment process may be a pressure increase or a pressure decrease. The specific situation may be determined according to the actual rail pressure and the third target rail pressure, so that the engine enters the starting rail pressure (i.e., the third target rail pressure) to prepare for the engine test.

[0027] In some embodiments of the present invention, Figure 2 As shown, step S102 includes: S201, setting a preset change range and a demand value; the demand value is the same as the actual rail pressure; S202, controlling the demand value to be boosted to a first target rail pressure according to a preset variation range; S203 , controlling the actual rail pressure to be boosted to the first target rail pressure according to a boosting process of the demand value.

[0028] In a specific embodiment of the present invention, during the process of rail pressure increase, if the demand value changes too much, in order to respond quickly, it is easy to overshoot and other situations. Therefore, it is necessary to set a preset change range and demand value for the process of rail pressure increase, wherein the preset change range may include a change rate and a step size, so that the demand value can be increased to the first target rail pressure according to the change rate (with a fixed slope), or a fixed step size and interval time are set to increase to the first target rail pressure in a step-by-step manner, so that the actual rail pressure can be controlled to increase according to the pressure increase process of the demand value, and then it can be increased to the first target rail pressure. The specific change rate and step size are set according to the actual situation, and the embodiment of the present invention is not limited here, so that the pressure building time for the actual rail pressure of the engine to reach the first target rail pressure can be obtained.

[0029] In some embodiments of the present invention, before step S103, the method further includes: Determining whether the actual rail pressure of the engine meets a first preset condition; If so, the actual rail pressure is controlled to decrease from the first target rail pressure to the second target rail pressure, and the pressure reduction time is obtained, and the pressure reduction time is used as the pressure relief time.

[0030] In a specific embodiment of the present invention, the actual rail pressure of the engine may be judged to determine whether the actual rail pressure of the engine satisfies a first preset condition. The first preset condition may be to wait for the actual rail pressure of the engine to run stably at the first target rail pressure or for the actual rail pressure to fail to reach the first target rail pressure after a sufficiently long time (preset time); if yes, step S103 and subsequent steps are performed; if not, the waiting continues until the first preset condition is satisfied.

[0031] Furthermore, the engine may be controlled to reduce the actual rail pressure according to the second target rail pressure, thereby obtaining the pressure relief time from the actual rail pressure starting to reduce from the first target rail pressure to the end of reducing the second target rail pressure, wherein the target rail pressure may not limit the change rate during the pressure reduction process.

[0032] In some embodiments of the present invention, Figure 3 As shown, after step S103, the following steps are also included: S301, determining whether the actual rail pressure of the engine meets a second preset condition; S302: If yes, diagnose the high pressure common rail fuel system according to the pressure build-up time and the pressure release time to obtain a diagnosis result; S303: If not, update the operating data according to the high-pressure common rail fuel system, and perform diagnosis according to the updated data to obtain a diagnosis result.

[0033] In a specific embodiment of the present invention, the number of cycles can be set, from step S101 to step S103 is one cycle, and the number of cycles is updated. After controlling the actual rail pressure to drop from the first target rail pressure to the second target rail pressure and obtaining the pressure reduction time, and taking the pressure reduction time as the pressure relief time, it is determined whether the actual rail pressure of the engine meets the second preset condition, wherein the second preset condition can be waiting for the actual rail pressure of the engine to run stably at the second target rail pressure or the actual rail pressure cannot drop to the second target rail pressure after a sufficiently long time, and then determining whether the number of cycles is the preset number; if yes, step S104 can be performed according to the stable value in the process of multiple cycles, for example, the preset number is 10, if the results of 10 times are the same, it can be determined to be stable, if there are 2 different times and 8 the same times, it can be determined that the values ​​in 8 times are stable, if not, it returns to step S101 again, so as to cycle, the cycle test is because a single test has sporadicity, and a comprehensive judgment of multiple tests can eliminate sporadicity and avoid misdiagnosis.

[0034] In some embodiments of the present invention, Figure 4 As shown, step S104 includes: S401, determining whether the pressure build-up time and the pressure relief time are both within a preset normal range: S402: If yes, determine that the diagnosis result of the high pressure common rail fuel system is normal; S403: If not, determine that the diagnosis result of the high-pressure common rail fuel system is abnormal, and judge the pressure build-up time and the pressure release time respectively to obtain the abnormal diagnosis result of the high-pressure common rail fuel system.

[0035] In a specific embodiment of the present invention, the pressure build-up time and the pressure release time can be judged to determine whether they are both within a preset normal range. The preset normal range can be a normal pressure build-up time and pressure release time range for an engine under the same operating conditions at a target speed. If so, it indicates that the high-pressure common rail fuel system is in a normal state and the diagnosis result is normal. If not, it can be determined that the diagnosis result of the high-pressure common rail fuel system is abnormal, and then the pressure build-up time and the pressure release time can be further judged to obtain an abnormal diagnosis result of the high-pressure common rail fuel system.

[0036] In some embodiments of the present invention, step S403 includes: When the pressure relief time is less than the preset normal range, and the pressure build-up time is greater than the preset normal range, it is determined that the abnormal diagnosis result of the high-pressure common rail fuel system is an abnormal leakage or a problem at the fuel inlet end; When the pressure relief time is less than the preset normal range, and the pressure build-up time is not greater than the preset normal range, it is determined that the abnormal diagnosis result of the high-pressure common rail fuel system is an abnormal leakage; When the pressure relief time is not less than the preset normal range, and the pressure build-up time is greater than the preset normal range, it is determined that the abnormal diagnosis result of the high-pressure common rail fuel system is a problem at the fuel inlet end; When the pressure relief time is greater than a preset normal range, it is determined that the abnormal diagnosis result of the high pressure common rail fuel system is that the oil pump oil inlet characteristic is offset.

[0037] In a specific embodiment of the present invention, the pressure relief time can be judged first. When the pressure relief time is less than the preset normal range, it means that the pressure relief time is too short. When the pressure building time is greater than the preset normal range, it means that the pressure building time is too long. In this case, if the pressure building process finally reaches the first target rail pressure, it is classified as an abnormal leakage. If the first target rail pressure cannot be reached within the limit time, there may be a problem at the oil inlet end, the oil intake is insufficient to complete the pressure increase, and the pressure relief is not started from the first target rail pressure, the pressure relief time will be too short and the pressure building time will be too long; it may also be an abnormal leakage, and the pressure building cannot be completed due to abnormal leakage, the pressure relief time will be too short and the pressure building time will be too long. When the pressure relief time is less than the preset normal range and the pressure building time is not greater than the preset normal range, it means that the pressure relief time is too short and the pressure building time is not too long, and the abnormal diagnosis result of the high-pressure common rail fuel system is determined to be an abnormal leakage. When the pressure relief time is not less than the preset normal range, and the pressure build-up time is greater than the preset normal range, it means that the pressure relief time is not too small and the pressure build-up time is too large, and the abnormal diagnosis result of the high-pressure common rail fuel system is determined to be a problem at the oil inlet end, which may be a deviation of the oil pump characteristics (deviation in the direction of small oil inlet) or a blocked oil inlet oil path. When the pressure relief time is greater than the preset normal range, it means that the pressure relief time is too large, and the abnormal diagnosis result of the high-pressure common rail fuel system is determined to be a deviation of the oil pump oil inlet characteristics (deviation in the direction of large oil inlet).

[0038] In order to better implement the high-pressure common rail fuel system diagnostic method in the embodiment of the present invention, based on the high-pressure common rail fuel system diagnostic method, the embodiment of the present invention also provides a high-pressure common rail fuel system diagnostic device, such as Figure 5 As shown, the high pressure common rail fuel system diagnostic device 500 includes: The data acquisition module 501 is used to acquire the operation data of the high-pressure common rail fuel system during operation; the operation data includes the actual rail pressure, the first target rail pressure and the second target rail pressure; The rail pressure boosting module 502 is used to control the actual rail pressure to be boosted to the first target rail pressure, and obtain the boosting time, and use the boosting time as the pressure building time; The rail pressure relief module 503 is used to control the actual rail pressure to drop from the first target rail pressure to the second target rail pressure, and obtain the pressure drop time, and use the pressure drop time as the pressure relief time; The result determination module 504 is used to diagnose the high pressure common rail fuel system according to the pressure build-up time and the pressure release time to obtain a diagnosis result.

[0039] The high-pressure common rail fuel system diagnostic device 500 provided in the above embodiment can implement the technical solution described in the above embodiment of the high-pressure common rail fuel system diagnostic method. The specific implementation principles of the above modules or units can refer to the corresponding contents in the above embodiment of the high-pressure common rail fuel system diagnostic method, which will not be repeated here.

[0040] like Figure 6 As shown, the present invention also provides an electronic device 600. The electronic device 600 includes a processor 601, a memory 602 and a display 603. Figure 6 Only some components of the electronic device 600 are shown, but it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0041] In some embodiments, the memory 602 may be an internal storage unit of the electronic device 600, such as a hard disk or memory of the electronic device 600. In other embodiments, the memory 602 may also be an external storage device of the electronic device 600, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc., equipped on the electronic device 600.

[0042] Furthermore, the memory 602 may include both an internal storage unit of the electronic device 600 and an external storage device. The memory 602 is used to store application software installed in the electronic device 600 and various data.

[0043] In some embodiments, the processor 601 may be a central processing unit (CPU), a microprocessor or other data processing chip, and is used to run program codes or process data stored in the memory 602, such as the high-pressure common rail fuel system diagnostic method of the present invention.

[0044] In some embodiments, the display 603 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, etc. The display 603 is used to display information of the electronic device 600 and to display a visual user interface. The components 601-603 of the electronic device 600 communicate with each other through a system bus.

[0045] In some embodiments of the present invention, when the processor 601 executes the high pressure common rail fuel system diagnostic program in the memory 602, the following steps may be implemented: Acquiring operation data of the high-pressure common rail fuel system during operation; the operation data includes actual rail pressure, first target rail pressure and second target rail pressure; Controlling the actual rail pressure to increase to the first target rail pressure, and obtaining the boosting time, and using the boosting time as the pressure building time; Controlling the actual rail pressure to decrease from the first target rail pressure to the second target rail pressure, and obtaining the pressure reduction time, and using the pressure reduction time as the pressure relief time; The high pressure common rail fuel system is diagnosed according to the pressure build-up time and the pressure release time to obtain a diagnosis result.

[0046] It should be understood that: when the processor 601 executes the high pressure common rail fuel system diagnostic program in the memory 602, in addition to the above functions, other functions may also be implemented, and the details may refer to the description of the corresponding method embodiment above.

[0047] Furthermore, the embodiment of the present invention does not specifically limit the type of the electronic device 600 mentioned, and the electronic device 600 may be a portable electronic device such as a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop computer, etc. Exemplary embodiments of portable electronic devices include but are not limited to portable electronic devices equipped with IOS, Android, Microsoft or other operating systems. The above-mentioned portable electronic devices may also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the present invention, the electronic device 600 may not be a portable electronic device, but a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0048] Accordingly, an embodiment of the present application also provides a computer-readable storage medium, which is used to store computer-readable programs or instructions. When the program or instructions are executed by a processor, the steps or functions of the high-pressure common rail fuel system diagnostic method provided in the above-mentioned method embodiments can be implemented.

[0049] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware (such as a processor, a controller, etc.) through a computer program, and the computer program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0050] The high-pressure common rail fuel system diagnostic method, device, electronic device and storage medium provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A high pressure common rail fuel system diagnostic method, characterized in that: include: Acquiring operation data of the high-pressure common rail fuel system during operation; the operation data includes an actual rail pressure, a first target rail pressure, and a second target rail pressure; controlling the actual rail pressure to be boosted to the first target rail pressure, and obtaining a boosting time, and using the boosting time as a pressure building time; controlling the actual rail pressure to decrease from the first target rail pressure to the second target rail pressure, and obtaining a pressure reduction time, and using the pressure reduction time as a pressure relief time; The high-pressure common rail fuel system is diagnosed according to the pressure building time and the pressure releasing time to obtain a diagnosis result.

2. The high pressure common rail fuel system diagnostic method according to claim 1, characterized in that: The operation data further includes a third target rail pressure, wherein the third target rail pressure is less than the first target rail pressure; After obtaining the operation data of the high pressure common rail fuel system during operation, the method further includes: The actual rail pressure is controlled to be adjusted to the third target rail pressure to obtain an adjusted actual rail pressure.

3. The high pressure common rail fuel system diagnostic method according to claim 1, characterized in that: The controlling the actual rail pressure to increase to the first target rail pressure includes: Setting a preset change range and a required value; the required value is the same as the value of the actual rail pressure; Controlling the demand value to be boosted to the first target rail pressure according to the preset variation range; The actual rail pressure is controlled to be increased to the first target rail pressure according to a pressure increase process of the demand value.

4. The high pressure common rail fuel system diagnostic method according to claim 1, characterized in that: The controlling the actual rail pressure to drop from the first target rail pressure to the second target rail pressure, and obtaining a pressure drop time, and using the pressure drop time as a pressure relief time, further includes: Determining whether the actual rail pressure of the engine meets a first preset condition; If so, the actual rail pressure is controlled to be reduced from the first target rail pressure to the second target rail pressure, and the pressure reduction time is obtained, and the pressure reduction time is used as the pressure relief time.

5. The high pressure common rail fuel system diagnostic method according to claim 1, characterized in that: The controlling the actual rail pressure to drop from the first target rail pressure to the second target rail pressure, and obtaining a pressure drop time, and using the pressure drop time as a pressure relief time, further includes: Determining whether the actual rail pressure of the engine meets a second preset condition; If yes, diagnose the high pressure common rail fuel system according to the pressure build-up time and the pressure release time to obtain a diagnosis result; If not, the operating data is updated according to the high pressure common rail fuel system, and a diagnosis is performed according to the updated data to obtain a diagnosis result.

6. The high pressure common rail fuel system diagnostic method according to claim 1, characterized in that: The diagnosing the high pressure common rail fuel system according to the pressure building time and the pressure relief time to obtain a diagnosis result includes: Determine whether the pressure build-up time and the pressure relief time are both within a preset normal range: If yes, determining that the diagnosis result of the high pressure common rail fuel system is normal; If not, it is determined that the diagnosis result of the high-pressure common rail fuel system is abnormal, and the pressure build-up time and the pressure release time are judged respectively to obtain an abnormal diagnosis result of the high-pressure common rail fuel system.

7. The high pressure common rail fuel system diagnostic method according to claim 6, characterized in that: The determining of the pressure building time and the pressure relief time to obtain the abnormality diagnosis result of the high pressure common rail fuel system includes: When the pressure relief time is less than the preset normal range, and the pressure build-up time is greater than the preset normal range, it is determined that the abnormal diagnosis result of the high-pressure common rail fuel system is an abnormal leakage or a problem at the fuel inlet end; When the pressure relief time is less than the preset normal range, and the pressure build-up time is not greater than the preset normal range, determining that the abnormal diagnosis result of the high-pressure common rail fuel system is an abnormal leakage; When the pressure relief time is not less than the preset normal range, and the pressure build-up time is greater than the preset normal range, it is determined that the abnormal diagnosis result of the high-pressure common rail fuel system is a problem at the fuel inlet end; When the pressure relief time is greater than the preset normal range, it is determined that the abnormal diagnosis result of the high-pressure common rail fuel system is that the oil pump oil inlet characteristic is offset.

8. A high-pressure common rail fuel system diagnostic device, characterized in that: include: A data acquisition module, used to acquire operating data of the high-pressure common rail fuel system during operation; the operating data includes an actual rail pressure, a first target rail pressure, and a second target rail pressure; A rail pressure boosting module, used for controlling the actual rail pressure to be boosted to the first target rail pressure, and obtaining a boosting time, and using the boosting time as a pressure building time; a rail pressure relief module, used for controlling the actual rail pressure to drop from the first target rail pressure to the second target rail pressure, and obtaining a pressure drop time, and using the pressure drop time as a pressure relief time; The result determination module is used to diagnose the high-pressure common rail fuel system according to the pressure building time and the pressure relief time to obtain a diagnosis result.

9. An electronic device, characterized in that: include: A processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, the steps of the high-pressure common rail fuel system diagnostic method as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer readable storage medium stores a computer program, and when the computer program is executed by the processor, the steps of the high-pressure common rail fuel system diagnostic method according to any one of claims 1 to 7 are implemented.

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