CN114542310A - Method, device, system and medium for judging cause of over-high rail pressure of engine - Google Patents
Method, device, system and medium for judging cause of over-high rail pressure of engine Download PDFInfo
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- CN114542310A CN114542310A CN202210189464.6A CN202210189464A CN114542310A CN 114542310 A CN114542310 A CN 114542310A CN 202210189464 A CN202210189464 A CN 202210189464A CN 114542310 A CN114542310 A CN 114542310A
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- engine
- rail pressure
- preset threshold
- threshold value
- oil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/228—Warning displays
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/31—Control of the fuel pressure
-
- 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
Abstract
The application provides a method, a device, a system and a medium for judging reasons of overhigh rail pressure of an engine, wherein the method comprises the following steps: when the difference value between the current rail pressure actual value of the engine and the rail pressure set value of the engine is larger than a first preset threshold value, the opening degree of an oil quantity metering unit of the fuel system is controlled to be reduced by a second preset threshold value, and when the difference value between the current rail pressure actual value and the rail pressure set value of the engine is larger than the first preset threshold value after the opening degree of the oil quantity metering unit of the fuel system is controlled to be reduced by the second preset threshold value, the rail pressure of the engine caused by the high return oil pressure of the fuel system is judged to be too high. Therefore, whether the engine rail pressure caused by the overhigh oil return pressure is overhigh or not can be automatically identified by adjusting the opening of the oil quantity metering unit, the reason of the problem of quick and accurate positioning of a tester can be helped, the efficiency is improved, and the user experience is enhanced.
Description
Technical Field
The application relates to the technical field of engines, in particular to a method, a device, a system and a medium for judging reasons of overhigh rail pressure of an engine.
Background
The return pressure of an engine fuel system needs to meet preset requirements, if the return pressure is too large, the fuel pressure in an engine fuel supply rail is too large, namely, the rail pressure is too high or a pressure limiting valve is opened, and the like, so that the faults of insufficient torque limiting power of an engine are caused, namely, the power of limited torque output of the engine is insufficient, but at present, when the problem of the actual rail pressure is too high, the problem reason cannot be identified timely and accurately.
Disclosure of Invention
In view of the above, it is an object of the present application to provide a method, apparatus, system and medium for determining a cause of an excessive engine rail pressure,
in order to achieve the purpose, the technical scheme is as follows:
in a first aspect, an embodiment of the present application provides a method for determining a cause of an excessive engine rail pressure, including:
when the difference value between the current rail pressure actual value of the engine and the rail pressure set value of the engine is larger than a first preset threshold value, controlling the opening of an oil quantity metering unit of the fuel system to reduce by a second preset threshold value;
and when the difference value between the current rail pressure actual value and the rail pressure set value of the engine is greater than a first preset threshold value after the opening of the oil mass metering unit for controlling the fuel system is reduced by a second preset threshold value, judging that the rail pressure of the engine is too high due to high return oil pressure of the fuel system.
In a possible implementation manner, the controlling the opening of the fuel quantity metering unit of the fuel system to decrease by a second preset threshold value includes:
and adjusting the duty ratio of the oil quantity metering unit to reduce the opening of the oil quantity metering unit by a second preset threshold value.
In one possible implementation, the method further includes:
before the opening of an oil mass metering unit of the fuel oil system is controlled to reduce a second preset threshold value, the engine is controlled to be in a steady-state working condition, the rotating speed of the engine is smaller than or equal to a third preset threshold value, the load change of the engine is smaller than or equal to a fourth preset threshold value, and the oil mass metering unit has no electrical fault.
In one possible implementation manner, after the determining that the engine rail pressure is too high due to the high return oil pressure of the fuel system, the method further includes:
and reporting a fault prompt so that a technician can adjust the oil return pressure.
In a second aspect, an embodiment of the present application further provides an apparatus for determining a cause of an excessive rail pressure of an engine, including:
the control unit is used for controlling the opening of an oil quantity metering unit of the fuel system to reduce by a second preset threshold when the difference value between the current rail pressure actual value of the engine and the rail pressure set value of the engine is larger than the first preset threshold;
and the judging unit is used for judging that the rail pressure of the engine is overhigh due to high return oil pressure of the fuel system when the difference value between the current rail pressure actual value and the rail pressure set value of the engine is greater than a first preset threshold value after the opening of the oil quantity metering unit for controlling the fuel system is reduced by a second preset threshold value.
In one possible implementation, the control unit includes:
and the adjusting unit is used for adjusting the duty ratio of the oil quantity metering unit so as to reduce the opening of the oil quantity metering unit by a second preset threshold value.
In one possible implementation, the apparatus further includes:
and the engine condition control unit is used for controlling the engine to be in a steady-state working condition before the opening degree of an oil mass metering unit of the fuel oil system is reduced by a second preset threshold value, the rotating speed of the engine is less than or equal to a third preset threshold value, the load change of the engine is less than or equal to a fourth preset threshold value, and the oil mass metering unit has no electrical fault.
In one possible implementation, the apparatus further includes:
and the fault alarm unit is used for reporting fault prompt so that technicians can adjust the oil return pressure conveniently.
In a third aspect, an embodiment of the present application further provides a system for determining a cause of an excessive engine rail pressure, including:
a memory for storing a computer program;
a processor for implementing the steps of the method for determining a cause of excessive engine rail pressure as described above when executing the computer program.
In a fourth aspect, the present application further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is processed and executed, the computer program implements the steps of the method for determining the cause of the engine rail pressure overhigh as described above.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart illustrating a method for determining a cause of an over-rail engine pressure according to an embodiment of the present disclosure;
fig. 2 shows a schematic diagram of an apparatus for determining a cause of an engine rail pressure that is provided by an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited by the specific embodiments disclosed below.
As described in the background art, the oil return pressure of an engine fuel system needs to meet a preset requirement, if the oil return pressure is too high, the fuel pressure in an engine fuel supply rail is too high, namely, the rail pressure is too high or a pressure limiting valve is opened, and the like, and the torque limiting power of an engine is insufficient, namely, the power of the engine with limited torque output is insufficient, but at present, when the problem of the actual rail pressure is too high, the cause of the problem cannot be identified timely and accurately.
In order to solve the above technical problem, embodiments of the present application provide a method, an apparatus, a system, and a medium for determining a cause of an over-rail pressure of an engine, where the method includes: when the difference value between the current rail pressure actual value of the engine and the rail pressure set value of the engine is larger than a first preset threshold value, the opening degree of an oil quantity metering unit of the fuel oil system is controlled to be reduced by a second preset threshold value, and when the difference value between the current rail pressure actual value and the rail pressure set value of the engine is larger than the first preset threshold value after the opening degree of the oil quantity metering unit of the fuel oil system is reduced by the second preset threshold value, the condition that the rail pressure of the engine is overhigh due to the high return oil pressure of the fuel oil system is judged. Therefore, whether the engine rail pressure caused by the overhigh oil return pressure is overhigh or not can be automatically identified by adjusting the opening of the oil quantity metering unit, the reason of the problem of quick and accurate positioning of a tester can be helped, the efficiency is improved, and the user experience is enhanced.
Exemplary method
Referring to fig. 1, the figure is a flowchart of a method for determining a cause of an engine rail over-pressure according to an embodiment of the present application, where the method includes:
s101: and when the difference value between the current rail pressure actual value of the engine and the rail pressure set value of the engine is larger than a first preset threshold value, controlling the opening of an oil quantity metering unit of the fuel system to reduce by a second preset threshold value.
In the embodiment of the application, in the normal working process of the engine, the rail pressure actual value changes along with the rail pressure set value, and if the deviation is overlarge, the working stability of the engine can be influenced, so that the current rail pressure actual value and the current rail pressure set value of the engine can be judged in real time.
And when the difference value between the current rail pressure actual value of the engine and the rail pressure set value of the engine is larger than a first preset threshold value, controlling the opening of an oil quantity metering unit of the fuel system to reduce by a second preset threshold value, and observing the actual rail pressure value.
Whether the opening adjustment of the oil quantity metering unit of the fuel system plays a role in reducing the actual rail pressure of the engine can be judged by observing whether the actual rail pressure value is reduced or not.
It should be noted that the size of the second preset threshold may be set by a person skilled in the art according to practical situations, and the embodiment of the present application is not limited in detail herein.
S102: and when the difference value between the current rail pressure actual value and the rail pressure set value of the engine is greater than a first preset threshold value after the opening of the oil mass metering unit for controlling the fuel system is reduced by a second preset threshold value, judging that the rail pressure of the engine is too high due to high return oil pressure of the fuel system.
In this embodiment of the application, after the opening degree of the oil amount metering unit controlling the fuel system is decreased by the second preset threshold, it may be continuously determined whether a difference between the current rail pressure actual value and the rail pressure set value of the engine is greater than the first preset threshold, and when the difference between the current rail pressure actual value and the rail pressure set value of the engine is greater than the first preset threshold, it is determined that the opening degree is decreased without effect, and it is considered that the rail pressure is high due to the high return pressure, that is, it is determined that the rail pressure of the engine is too high due to the high return pressure of the fuel system.
In a possible implementation, the opening of the fuel quantity metering unit of the fuel system is controlled to decrease by a second preset threshold value, and the decrease can be controlled by:
and adjusting the duty ratio of the oil quantity metering unit to reduce the opening of the oil quantity metering unit by a second preset threshold, wherein the duty ratio of the oil quantity metering unit refers to the proportion of the electrifying time relative to the total time in one pulse cycle.
It should be noted that the size of the first preset threshold may be set by a person skilled in the art according to practical situations, and the embodiment of the present application is not limited in detail herein.
In a possible implementation manner, the method provided in the embodiment of the present application further includes:
before the opening degree of an oil quantity metering unit of a fuel system is controlled to be reduced by a second preset threshold value, the engine is controlled to be in a steady state working condition, the rotating speed of the engine is smaller than or equal to a third preset threshold value, the load change of the engine is smaller than or equal to a fourth preset threshold value, and the oil quantity metering unit has no electrical fault.
It should be noted that the magnitudes of the second preset threshold and the third preset threshold may be set by those skilled in the art according to actual situations, and the embodiment of the present application is not specifically limited herein.
In addition, in the embodiment of the application, after the opening degree of the oil quantity metering unit of the fuel system is controlled to be reduced by the second preset threshold, the actual value of the rail pressure is correspondingly reduced, and the difference value between the actual value of the rail pressure and the rail pressure set value of the engine is smaller than the first preset threshold, which indicates that the rail pressure is too high due to other reasons, at this time, an alarm can be given to inform operation and maintenance personnel to further investigate other reasons.
The embodiment of the application provides a method for judging a reason of overhigh engine rail pressure, which comprises the following steps: when the difference value between the current rail pressure actual value of the engine and the rail pressure set value of the engine is larger than a first preset threshold value, the opening degree of an oil quantity metering unit of the fuel system is controlled to be reduced by a second preset threshold value, and when the difference value between the current rail pressure actual value and the rail pressure set value of the engine is larger than the first preset threshold value after the opening degree of the oil quantity metering unit of the fuel system is controlled to be reduced by the second preset threshold value, the rail pressure of the engine caused by the high return oil pressure of the fuel system is judged to be too high. Therefore, whether the engine rail pressure caused by the overhigh oil return pressure is overhigh or not can be automatically identified by adjusting the opening of the oil quantity metering unit, the reason of the problem of quick and accurate positioning of a tester can be helped, the efficiency is improved, and the user experience is enhanced.
Exemplary devices
Referring to fig. 2, a schematic diagram of an apparatus for determining a cause of an engine rail pressure that is provided in an embodiment of the present application includes:
the control unit 201 is used for controlling the opening of an oil quantity metering unit of the fuel system to reduce by a second preset threshold when the difference value between the current rail pressure actual value of the engine and the rail pressure set value of the engine is larger than the first preset threshold;
the judging unit 202 is configured to judge that the rail pressure of the engine is too high due to high return oil pressure of the fuel system when a difference between the current rail pressure actual value and the rail pressure set value of the engine is greater than a first preset threshold value after the opening of the fuel quantity metering unit of the fuel system is reduced by a second preset threshold value.
In one possible implementation, the control unit includes:
and the adjusting unit is used for adjusting the duty ratio of the oil quantity metering unit so as to reduce the opening of the oil quantity metering unit by a second preset threshold value.
In one possible implementation, the apparatus further includes:
and the engine condition control unit is used for controlling the engine to be in a steady-state working condition before the opening degree of an oil mass metering unit of the fuel oil system is reduced by a second preset threshold value, the rotating speed of the engine is less than or equal to a third preset threshold value, the load change of the engine is less than or equal to a fourth preset threshold value, and the oil mass metering unit has no electrical fault.
In one possible implementation, the apparatus further includes:
and the fault alarm unit is used for reporting fault reminding so as to facilitate technicians to adjust the oil return pressure.
The embodiment of the application provides a device for judging the reason of overhigh rail pressure of an engine, and a method utilizing the device comprises the following steps: when the difference value between the current rail pressure actual value of the engine and the rail pressure set value of the engine is larger than a first preset threshold value, the opening degree of an oil quantity metering unit of the fuel system is controlled to be reduced by a second preset threshold value, and when the difference value between the current rail pressure actual value and the rail pressure set value of the engine is larger than the first preset threshold value after the opening degree of the oil quantity metering unit of the fuel system is controlled to be reduced by the second preset threshold value, the rail pressure of the engine caused by the high return oil pressure of the fuel system is judged to be too high. Therefore, whether the engine rail pressure caused by the overhigh oil return pressure is overhigh or not can be automatically identified by adjusting the opening of the oil quantity metering unit, the reason of the problem of quick and accurate positioning of a tester can be helped, the efficiency is improved, and the user experience is enhanced.
On the basis of the above embodiments, the present application further provides a system for determining a cause of an excessive engine rail pressure, including:
a memory for storing a computer program;
a processor for implementing the steps of the method for determining a cause of excessive engine rail pressure as described above when executing the computer program.
On the basis of the above embodiments, the present application further provides a computer readable storage medium, on which a computer program is stored, and when the computer program is processed and executed, the computer program implements the steps of the method for determining the cause of the engine rail pressure overhigh.
The computer-readable storage medium may include: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for device embodiments, since they are substantially similar to method embodiments, they are described relatively simply, and reference may be made to some descriptions of the method embodiments for relevant points.
The foregoing is merely a preferred embodiment of the present application and, although the present application discloses the foregoing preferred embodiments, the present application is not limited thereto. Those skilled in the art can now make numerous possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments, using the methods and techniques disclosed above, without departing from the scope of the claimed embodiments. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still fall within the protection scope of the technical solution of the present application without departing from the content of the technical solution of the present application.
Claims (10)
1. A method of determining a cause of excessive engine rail pressure, comprising:
when the difference value between the current rail pressure actual value of the engine and the rail pressure set value of the engine is larger than a first preset threshold value, controlling the opening of an oil quantity metering unit of the fuel system to reduce by a second preset threshold value;
and when the difference value between the current rail pressure actual value and the rail pressure set value of the engine is greater than a first preset threshold value after the opening of the oil mass metering unit for controlling the fuel system is reduced by a second preset threshold value, judging that the rail pressure of the engine is too high due to high return oil pressure of the fuel system.
2. The method of claim 1, wherein controlling the opening of a fuel metering unit of the fuel system to decrease by a second preset threshold comprises:
and adjusting the duty ratio of the oil quantity metering unit to reduce the opening of the oil quantity metering unit by a second preset threshold value.
3. The method of claim 1, further comprising:
before the opening of an oil mass metering unit of the fuel oil system is controlled to reduce a second preset threshold value, the engine is controlled to be in a steady-state working condition, the rotating speed of the engine is smaller than or equal to a third preset threshold value, the load change of the engine is smaller than or equal to a fourth preset threshold value, and the oil mass metering unit has no electrical fault.
4. The method of claim 1, wherein after said determining that said engine rail pressure is too high due to said high fuel system return oil pressure, said method further comprises:
a fault alert is reported for the technician to adjust the return pressure.
5. An apparatus for determining a cause of an excessive engine rail pressure, comprising:
the control unit is used for controlling the opening of an oil quantity metering unit of the fuel system to reduce by a second preset threshold when the difference value between the current rail pressure actual value of the engine and the rail pressure set value of the engine is larger than the first preset threshold;
and the judging unit is used for judging that the rail pressure of the engine is overhigh due to high return oil pressure of the fuel system when the difference value between the current rail pressure actual value and the rail pressure set value of the engine is greater than a first preset threshold value after the opening of the oil quantity metering unit for controlling the fuel system is reduced by a second preset threshold value.
6. The apparatus of claim 5, wherein the control unit comprises:
and the adjusting unit is used for adjusting the duty ratio of the oil quantity metering unit so as to reduce the opening of the oil quantity metering unit by a second preset threshold value.
7. The apparatus of claim 5, further comprising:
and the engine condition control unit is used for controlling the engine to be in a steady-state working condition before the opening degree of an oil mass metering unit of the fuel oil system is reduced by a second preset threshold value, the rotating speed of the engine is less than or equal to a third preset threshold value, the load change of the engine is less than or equal to a fourth preset threshold value, and the oil mass metering unit has no electrical fault.
8. The apparatus of claim 5, further comprising:
and the fault alarm unit is used for reporting fault prompt so that technicians can adjust the oil return pressure conveniently.
9. A system for determining a cause of an engine over-rail pressure, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the method of determining a cause of excessive engine rail pressure as claimed in any one of claims 1 to 4 when executing the computer program.
10. A computer-readable storage medium, having stored thereon a computer program which, when being processed and executed, carries out the steps of the method of determining a cause of an engine rail pressure overshoot according to any of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210189464.6A CN114542310B (en) | 2022-02-28 | 2022-02-28 | Method, device, system and medium for judging reason of excessive rail pressure of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210189464.6A CN114542310B (en) | 2022-02-28 | 2022-02-28 | Method, device, system and medium for judging reason of excessive rail pressure of engine |
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| CN114542310A true CN114542310A (en) | 2022-05-27 |
| CN114542310B CN114542310B (en) | 2023-05-23 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020112528A1 (en) * | 2000-11-14 | 2002-08-22 | Pierpaolo Antonioli | Method of diagnosing leakage in an internal combustion engine common-rail injection system |
| CN1746475A (en) * | 2004-09-10 | 2006-03-15 | 株式会社电装 | Common rail fuel injection system |
| DE102008024545A1 (en) * | 2008-05-21 | 2009-11-26 | Continental Automotive Gmbh | Method for determining cause of defect in low pressure area of fuel injection system of internal combustion engine of motor vehicle, involves determining actual cause of defect by monitoring reaction of injection system to load step |
| CN104895690A (en) * | 2014-03-06 | 2015-09-09 | 罗伯特·博世有限公司 | Method for reducing maximal pressure of rail shared injector |
| CN104975957A (en) * | 2014-04-04 | 2015-10-14 | 福特环球技术公司 | Method and system for engine control |
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2022
- 2022-02-28 CN CN202210189464.6A patent/CN114542310B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020112528A1 (en) * | 2000-11-14 | 2002-08-22 | Pierpaolo Antonioli | Method of diagnosing leakage in an internal combustion engine common-rail injection system |
| CN1746475A (en) * | 2004-09-10 | 2006-03-15 | 株式会社电装 | Common rail fuel injection system |
| DE102008024545A1 (en) * | 2008-05-21 | 2009-11-26 | Continental Automotive Gmbh | Method for determining cause of defect in low pressure area of fuel injection system of internal combustion engine of motor vehicle, involves determining actual cause of defect by monitoring reaction of injection system to load step |
| CN104895690A (en) * | 2014-03-06 | 2015-09-09 | 罗伯特·博世有限公司 | Method for reducing maximal pressure of rail shared injector |
| CN104975957A (en) * | 2014-04-04 | 2015-10-14 | 福特环球技术公司 | Method and system for engine control |
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| CN114542310B (en) | 2023-05-23 |
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