CN113062812A - Engine safety monitoring and detecting method, device, medium and electronic equipment - Google Patents
Engine safety monitoring and detecting method, device, medium and electronic equipment Download PDFInfo
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- CN113062812A CN113062812A CN202110454963.9A CN202110454963A CN113062812A CN 113062812 A CN113062812 A CN 113062812A CN 202110454963 A CN202110454963 A CN 202110454963A CN 113062812 A CN113062812 A CN 113062812A
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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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
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- Combustion & Propulsion (AREA)
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Abstract
The embodiment of the application discloses an engine safety monitoring detection method, an engine safety monitoring detection device, a medium and electronic equipment. The method comprises the following steps: acquiring actual fuel injection quantity and actual air inflow in the working process of an engine; judging whether the actual oil injection quantity and the actual air inflow meet preset rationality conditions or not; if not, controlling the power output of the engine to ensure the safety of the vehicle. According to the technical scheme, the actual fuel injection quantity and the actual air inflow can be mutually verified to provide information for engine monitoring, and the driving safety is improved.
Description
Technical Field
The embodiment of the application relates to the technical field of engines, in particular to an engine safety monitoring and detecting method, device, medium and electronic equipment.
Background
With increasingly complex technologies and increasing software content and mechatronic applications, the risks from systematic failures and random hardware failures are increasing, and functional safety requires that controlled equipment reliably enter and maintain a safe state to avoid harm to personnel or the environment regardless of whether a failure of a component or a safety-related control system occurs as a random hardware failure or a system failure. The torque is one of important indexes of engine performance parameters, and the key work for realizing functional safety is to monitor the actual output torque of the engine.
Due to the high cost of torque sensors, few engines are equipped with torque sensors, and the actual output torque of the engine is generally estimated by monitoring the air intake amount. The engine is equipped with an electronic throttle control protection system, and a basic throttle control system monitors the air inflow.
Once the electronic throttle valve has a signal error, the monitored air inflow is inaccurate, the vehicle is accelerated suddenly and unexpectedly, and the driving safety is low.
Disclosure of Invention
The embodiment of the application provides an engine safety monitoring detection method, device, medium and electronic equipment, and information is provided for engine monitoring by mutual verification of actual fuel injection quantity and actual air inflow, so that driving safety is improved.
In a first aspect, an embodiment of the present application provides an engine safety monitoring and detecting method, where the method includes:
acquiring actual fuel injection quantity and actual air inflow in the working process of an engine;
judging whether the actual oil injection quantity and the actual air inflow meet preset rationality conditions or not;
if not, controlling the power output of the engine to ensure the safety of the vehicle.
In a second aspect, an embodiment of the present application provides an engine safety monitoring and detecting device, including:
the actual oil injection quantity and actual air inflow acquisition module is used for acquiring the actual oil injection quantity and the actual air inflow in the working process of the engine;
the device comprises an actual oil injection quantity and actual air inflow judging module, a control module and a control module, wherein the actual oil injection quantity and actual air inflow judging module is used for judging whether the actual oil injection quantity and the actual air inflow meet preset rationality conditions or not;
and the engine power output control module is used for controlling the power output of the engine if the engine power output control module does not meet the requirement so as to ensure the safety of the vehicle.
In a third aspect, the present application provides a computer readable medium, on which a computer program is stored, where the computer program is executed by a processor to implement the engine safety monitoring detection method according to the present application.
In a fourth aspect, an embodiment of the present application provides an electronic device, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the computer program to implement the engine safety monitoring detection method according to the embodiment of the present application.
According to the technical scheme provided by the embodiment of the application, the actual oil injection quantity and the actual air inflow quantity in the working process of the engine are obtained; judging whether the actual oil injection quantity and the actual air inflow meet preset rationality conditions or not; if not, controlling the power output of the engine to ensure the safety of the vehicle. According to the technical scheme, the actual fuel injection quantity and the actual air inflow can be mutually verified to provide information for engine monitoring, and the driving safety is improved.
Drawings
FIG. 1 is a flow chart of a method for monitoring and detecting engine safety provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of an engine safety monitoring and detecting process provided in the second embodiment of the present application;
FIG. 3 is a schematic structural diagram of an engine safety monitoring and detecting device provided in a third embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic device according to a fifth embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures.
Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the steps as a sequential process, many of the steps can be performed in parallel, concurrently or simultaneously. In addition, the order of the steps may be rearranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
Example one
Fig. 1 is a flowchart of an engine safety monitoring and detecting method provided in an embodiment of the present application, where the present embodiment is applicable to a situation of performing safety monitoring on an engine, and the method may be executed by the engine safety monitoring and detecting apparatus provided in the embodiment of the present application, where the apparatus may be implemented by software and/or hardware, and may be integrated in an intelligent terminal or other device for engine safety monitoring.
As shown in fig. 1, the engine safety monitoring and detecting method includes:
and S110, acquiring the actual oil injection quantity and the actual air inflow quantity in the working process of the engine.
In the scheme, the engine is provided with an electronic throttle control protection system, and the conventional electronic throttle control protection system comprises two sets of independent hardware and three layers of software. The two sets of independent hardware comprise a 32-bit main processor and an external independent monitoring module; the three-layer software comprises: the engine control function, the function monitoring and the processor self-checking function. The engine control function mainly diagnoses the functions of important actuators and sensors related to electronic throttle control, and once relevant signals are detected or the actuators break down, the engine control function enters a fault limping mode to limit the power output of the engine so as to ensure the safety of the vehicle. The fault limp-home mode is that when an electronic control unit in an automobile ECU has a fault, the ECU automatically starts a backup control loop to simply control the engine. The function monitoring is mainly responsible for torque monitoring, the actual output torque is independently calculated through a simplified model, the allowable output torque is independently calculated through the simplified model, the actual output torque and the allowable output torque are compared, the torque output is limited when the actual output torque is larger than the allowable output torque, and the vehicle enters a fault limp-home mode. The actual output torque may be calculated from the actual fuel injection amount and the actual intake air amount. And a main processor self-checking function in the processor monitoring function monitors the state of the hardware of the main controller in real time.
The actual fuel injection quantity can be the total quantity of fuel injection and fuel supply of a fuel injector in the working process of the engine; the actual air intake amount may refer to a flow rate of fresh air entering the outside from the automobile engine. The normal operation of the engine can be ensured only when oxygen enters the engine during working.
In the embodiment, the fuel supply process and the fuel injection process of the engine both affect the rail pressure of the fuel rail, so that the rapid fluctuation of the instantaneous rail pressure is caused, and the actual fuel injection quantity can be calculated by measuring the change of the rail pressure of the fuel rail; the actual intake air amount may be obtained by an air flow meter in the electronic throttle control protection system.
In this technical solution, optionally, before obtaining an actual fuel injection amount and an actual intake air amount in an engine operating process, the method further includes:
and constructing an actual fuel injection quantity observation model according to the rail pressure change of the fuel rail, and obtaining the actual fuel injection quantity in the working process of the engine.
The change of the rail pressure of the fuel rail is directly related to the actual fuel injection quantity, the change of the rail pressure of the fuel rail is obtained by a sensor, and an actual fuel injection quantity observation model is constructed according to the change of the rail pressure of the fuel rail.
The actual fuel injection quantity in the working process of the engine can be obtained by constructing the actual fuel injection quantity observation model, and data support is provided for safety monitoring of the engine.
In this scheme, optionally, the process of constructing the actual fuel injection quantity observation model includes:
acquiring rail pressure in the oil injection process of each cylinder to obtain rail pressure discrete data;
calculating to obtain the average rail pressure and rail pressure drop of each cylinder according to the rail pressure discrete data;
and constructing an actual fuel injection quantity observation model by using the average rail pressure and the rail pressure drop.
The rail pressure in the oil injection process of each cylinder is collected at a fixed angle by a sensor, the rail pressure at different moments is obtained, and rail pressure discrete data are formed. Rail pressure may refer to the amount of pressure in the oil rail. The average rail pressure may be an average of rail pressures in each cylinder over a period of time; the rail pressure drop refers to the rail pressure difference value at two adjacent acquisition moments.
An actual fuel injection quantity observation model is constructed by utilizing the average rail pressure and the rail pressure drop, the actual fuel injection quantity in the working process of the engine can be obtained, and data support is provided for safety monitoring of the engine.
In this technical solution, optionally, constructing an actual fuel injection quantity observation model by using the average rail pressure and the rail pressure drop includes:
an actual fuel injection quantity observation model is constructed by adopting the following formula:
wherein Q is the actual fuel injection quantity, C1, C2, C3 and C4 are observation coefficients, P1 is the mean value of the average rail pressure of each cylinder, and P2 is the mean value of the rail pressure drop of each cylinder.
Specifically, the average rail pressure of all the cylinders of the engine is averaged, the rail pressure drop of all the cylinders of the engine is averaged, and an actual fuel injection quantity observation model is established. And selecting a plurality of engines as samples, and acquiring the actual oil injection quantity of all cylinders of each engine, the average value of the average rail pressure in the oil injection process and the average value of the instantaneous rail pressure drop so as to obtain the values of the observation coefficients C1, C2, C3 and C4.
The actual fuel injection quantity in the working process of the engine can be obtained by constructing the actual fuel injection quantity observation model, and data are provided for safety monitoring of the engine.
And S120, judging whether the actual oil injection quantity and the actual air inflow quantity meet preset rationality conditions.
In this embodiment, the preset rationality condition may be that the difference between the ratio of the actual fuel injection amount and the actual air intake amount does not exceed a certain threshold, and the number of times that the difference between the ratio of the actual fuel injection amount and the actual air intake amount exceeds the certain threshold is smaller than the count number.
In this technical scheme, optionally, judge whether actual fuel injection quantity and actual air input satisfy and predetermine the rationality condition, include:
determining an actual air-fuel ratio according to the actual fuel injection quantity and the actual air inflow;
obtaining an air-fuel ratio difference value through the actual air-fuel ratio and a preset theoretical air-fuel ratio;
and if the air-fuel ratio difference value does not meet the preset threshold value and the times that the air-fuel ratio difference value does not meet the preset threshold value meet the preset counting times, the actual oil injection amount and the actual air intake amount do not meet the preset rationality condition.
The actual air-fuel ratio is a mass ratio between an actual intake air amount and an actual fuel injection amount in the air-fuel mixture. Generally expressed in grams of air consumed per gram of fuel burned.
In the present embodiment, the preset threshold value and the preset number of counts may be values determined during the power output from the engine. If the difference value of the air-fuel ratio does not exceed a preset threshold value, the actual fuel injection quantity and the actual air inflow quantity meet a preset rationality condition and pass rationality check; if the difference value of the air-fuel ratio exceeds a preset threshold value, the counter is accumulated once, and when the accumulated times of the counter reaches a certain preset count, the actual air inflow or the actual fuel injection quantity signal can be determined to be unreasonable and can not pass the rationality check.
By utilizing the actual fuel injection quantity and the actual air input, whether the actual fuel injection quantity and the actual air input pass through the rationality check or not can be judged through the air-fuel ratio difference value, and reliable data are provided for the safety monitoring of the engine.
And S130, if the vehicle safety is not met, controlling the power output of the engine to ensure the vehicle safety.
In this scheme, in the gasoline direct injection system of LAMBDA ═ 1, there is fixed range relative air input and the ratio of relative fuel injection quantity, if actual fuel injection quantity and actual air input do not satisfy and predetermine the rationality condition, explain that actual fuel injection quantity and actual air input ratio are problematic, directly restrict engine power output by engine control function this moment to guarantee vehicle safety.
According to the technical scheme provided by the embodiment of the application, the actual oil injection quantity and the actual air inflow quantity in the working process of the engine are obtained; judging whether the actual oil injection quantity and the actual air inflow meet preset rationality conditions or not; if not, controlling the power output of the engine to ensure the safety of the vehicle. Through executing this technical scheme, can carry out the rationality with actual fuel injection quantity and actual air input and detect, for the engine monitoring provides information, improved driving safety.
Example two
Fig. 2 is a schematic diagram of an engine safety monitoring and detecting process provided in the second embodiment of the present invention, and the second embodiment is further optimized based on the first embodiment. The concrete optimization is as follows: if so, determining the actual output torque according to the actual oil injection quantity and the actual air inflow; judging whether the actual output torque meets a preset torque constraint condition or not; if not, the power output of the engine is controlled to ensure the safety of the vehicle. The details which are not described in detail in this embodiment are shown in the first embodiment. As shown in fig. 2, the method comprises the steps of:
and S210, if so, determining the actual output torque according to the actual oil injection quantity and the actual air intake quantity.
The actual output torque may be a torque output from the crankshaft end during the operation of the engine. When the actual output torque is larger than the allowable output torque, the vehicle has certain potential safety hazard.
In this embodiment, if actual fuel injection quantity and actual air input satisfy the predetermined rationality condition, through the rationality inspection, then according to actual fuel injection quantity and actual air input to obtain current engine speed, calculate and obtain actual output torque.
In this technical scheme, optionally, determining the actual output torque according to the actual fuel injection quantity and the actual air intake quantity includes:
determining a first output torque according to the actual fuel injection quantity and a preset engine rotating speed, and determining a second output torque according to the actual air intake quantity and the engine rotating speed;
and taking the maximum value of the first output torque and the second output torque as a target output torque, and calculating to obtain an actual output torque according to the target output torque and a predetermined additional torque characteristic.
Wherein the additional torque feature may be an additional feature used to calculate the actual output torque. For example, the additional torque characteristics may be spark efficiency, fuel cut efficiency, torque efficiency, and the like. For normal operation, the spark plug is periodically supplied with a high voltage of sufficient energy to cause the spark plug to generate a spark of sufficient intensity to ignite the combustible mixture, in accordance with the firing sequence of the cylinders. The engine fuel cut-off means that when the rotating speed of the engine reaches a certain height, such as 8000 rpm, a traveling computer can automatically stop supplying fuel to the engine, so that the rotating speed of the engine cannot exceed a limit value. The engine torque is a specific index of the acceleration capability of the engine, and means that a piston reciprocates in a cylinder to do certain work once.
The actual fuel injection quantity and the actual air inflow are mutually verified to provide information for engine monitoring, and driving safety is improved.
S220, judging whether the actual output torque meets a preset torque constraint condition or not;
wherein the preset torque constraint condition may be that the value of the actual output torque is smaller than the allowable output torque. By comparing the actual output torque with the allowable output torque, it can be determined whether the actual increased rotational speed of the engine exceeds the driver's expected rotational speed increase.
And S230, if the vehicle safety is not met, controlling the power output of the engine to ensure the vehicle safety.
It can be understood that if the actual output torque does not meet the preset torque constraint condition, the actual output torque of the engine is greater than the allowable output torque at the moment, the actual increased rotating speed of the engine exceeds the rotating speed expected to be increased by a driver, and at the moment, the vehicle has certain potential safety hazard, and the engine control function directly limits the power output of the engine to ensure the safety of the vehicle.
According to the technical scheme provided by the embodiment of the application, the actual oil injection quantity and the actual air inflow quantity in the working process of the engine are obtained; judging whether the actual oil injection quantity and the actual air inflow meet preset rationality conditions or not; if not, controlling the power output of the engine to ensure the safety of the vehicle; if so, determining the actual output torque according to the actual oil injection quantity and the actual air inflow; judging whether the actual output torque meets a preset torque constraint condition or not; if not, the power output of the engine is controlled to ensure the safety of the vehicle. Through executing this technical scheme, not only can detect engine safety monitoring through the rationality inspection, can also utilize actual fuel injection quantity and actual air input to verify each other and provide information for engine monitoring, improved driving safety.
EXAMPLE III
Fig. 3 is a schematic structural diagram of an engine safety monitoring and detecting device provided in the third embodiment of the present application, and as shown in fig. 3, the engine safety monitoring and detecting device includes:
an actual fuel injection quantity and actual air intake quantity obtaining module 310, configured to obtain an actual fuel injection quantity and an actual air intake quantity in an engine working process;
the actual oil injection quantity and actual air intake quantity judging module 320 is used for judging whether the actual oil injection quantity and the actual air intake quantity meet preset rationality conditions or not;
and the engine power output control module 330 is used for controlling the engine power output if the engine power output is not met, so as to ensure the safety of the vehicle.
In this technical solution, optionally, the actual fuel injection amount and the actual air intake amount determining module 320 includes:
the actual air-fuel ratio determining unit is used for determining an actual air-fuel ratio according to the actual fuel injection quantity and the actual air inflow;
an air-fuel ratio difference value obtaining unit for obtaining an air-fuel ratio difference value by the actual air-fuel ratio and a preset theoretical air-fuel ratio;
and the air-fuel ratio difference value judging unit is used for judging whether the actual oil injection quantity and the actual air input quantity meet the preset rationality condition or not if the air-fuel ratio difference value does not meet the preset threshold value and the times that the air-fuel ratio difference value does not meet the preset threshold value meet the preset counting times.
In this technical solution, optionally, the apparatus further includes:
and the actual fuel injection quantity observation model establishing module is used for establishing an actual fuel injection quantity observation model according to the rail pressure change of the fuel rail and acquiring the actual fuel injection quantity in the working process of the engine.
In this technical scheme, optionally, the module is found to actual fuel injection quantity observation model, includes:
the rail pressure discrete data obtaining unit is used for collecting rail pressure in the oil injection process of each cylinder to obtain rail pressure discrete data;
the average rail pressure and rail pressure drop calculating unit is used for calculating and obtaining the average rail pressure and rail pressure drop of each cylinder according to the rail pressure discrete data;
and the actual fuel injection quantity observation model construction unit is used for constructing an actual fuel injection quantity observation model by utilizing the average rail pressure and the rail pressure drop.
In this technical scheme, optionally, the actual fuel injection quantity observation model building unit is specifically used for:
an actual fuel injection quantity observation model is constructed by adopting the following formula:
wherein Q is the actual fuel injection quantity, C1, C2, C3 and C4 are observation coefficients, P1 is the mean value of the average rail pressure of each cylinder, and P2 is the mean value of the rail pressure drop of each cylinder.
In this technical solution, optionally, the apparatus further includes:
the actual output torque determining module is used for determining actual output torque according to the actual oil injection quantity and the actual air inflow if the actual output torque is met;
the actual output torque judgment module is used for judging whether the actual output torque meets a preset torque constraint condition or not;
and the engine power output control module is used for controlling the power output of the engine if the engine power output control module does not meet the requirement, so that the safety of the vehicle is ensured.
In this technical solution, optionally, the actual output torque determination module is specifically configured to:
determining a first output torque according to the actual fuel injection quantity and a preset engine rotating speed, and determining a second output torque according to the actual air intake quantity and the engine rotating speed;
and taking the maximum value of the first output torque and the second output torque as a target output torque, and calculating to obtain an actual output torque according to the target output torque and a predetermined additional torque characteristic.
The product can execute the method provided by the embodiment of the application, and has the corresponding functional modules and beneficial effects of the execution method.
Example four
A fourth embodiment of the present application further provides a medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform a method for engine safety monitoring detection, the method comprising:
acquiring actual fuel injection quantity and actual air inflow in the working process of an engine;
judging whether the actual oil injection quantity and the actual air inflow meet preset rationality conditions or not;
if not, controlling the power output of the engine to ensure the safety of the vehicle.
Media-any of various types of memory devices or storage devices. The term "media" is intended to include: mounting media such as CD-ROM, floppy disk, or tape devices; computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, Lanbas (Rambus) RAM, etc.; non-volatile memory such as flash memory, magnetic media (e.g., hard disk or optical storage); registers or other similar types of memory elements, etc. The medium may also include other types of memory or combinations thereof. In addition, the medium may be located in the computer system in which the program is executed, or may be located in a different second computer system, which is connected to the computer system through a network (such as the internet). The second computer system may provide the program instructions to the computer for execution. The term "media" may include two or more media that may reside in different locations, such as in different computer systems that are connected by a network. The media may store program instructions (e.g., embodied as computer programs) that are executable by one or more processors.
Of course, the medium provided by the embodiment of the present application contains computer executable instructions, and the computer executable instructions are not limited to the engine safety monitoring detection operation described above, and may also execute the relevant operations in the engine safety monitoring detection method provided by any embodiment of the present application.
EXAMPLE five
The fifth embodiment of the application provides electronic equipment, and the engine safety monitoring and detecting device provided by the fifth embodiment of the application can be integrated into the electronic equipment. Fig. 4 is a schematic structural diagram of an electronic device according to a fifth embodiment of the present application. As shown in fig. 4, the present embodiment provides an electronic device 400, which includes: one or more processors 420; a storage device 410, configured to store one or more programs, when the one or more programs are executed by the one or more processors 420, so that the one or more processors 420 implement the method for detecting engine safety monitoring provided by the embodiment of the present application, the method includes:
acquiring actual fuel injection quantity and actual air inflow in the working process of an engine;
judging whether the actual oil injection quantity and the actual air inflow meet preset rationality conditions or not;
if not, controlling the power output of the engine to ensure the safety of the vehicle.
Of course, those skilled in the art will understand that the processor 420 may also implement the technical solution of the engine safety monitoring and detecting method provided in any embodiment of the present application.
The electronic device 400 shown in fig. 4 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present application.
As shown in fig. 4, the electronic device 400 includes a processor 420, a storage device 410, an input device 430, and an output device 440; the number of the processors 420 in the electronic device may be one or more, and one processor 420 is taken as an example in fig. 4; the processor 420, the storage device 410, the input device 430, and the output device 440 in the electronic apparatus may be connected by a bus or other means, and are exemplified by a bus 450 in fig. 4.
The storage device 410 is a computer readable medium, and can be used to store software programs, computer executable programs, and module units, such as program instructions corresponding to the engine safety monitoring detection method in the embodiment of the present application.
The storage device 410 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the storage 410 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, storage 410 may further include memory located remotely from processor 420, which may be connected via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input means 430 may be used to receive input numbers, character information, or voice information, and to generate key signal inputs related to user settings and function control of the electronic device. The output device 440 may include a display screen, speakers, or other electronic equipment.
The electronic equipment provided by the embodiment of the application can achieve the purpose of utilizing the mutual verification of the actual fuel injection quantity and the actual air inflow to provide information for engine monitoring and improving the driving safety.
The engine safety monitoring and detecting device, the medium and the electronic equipment which are provided in the embodiments can execute the engine safety monitoring and detecting method provided by any embodiment of the application, and have corresponding functional modules and beneficial effects for executing the method. For technical details that are not described in detail in the above embodiments, reference may be made to the engine safety monitoring detection method provided in any embodiment of the present application.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the appended claims.
Claims (10)
1. An engine safety monitoring and detecting method is characterized by comprising the following steps:
acquiring actual fuel injection quantity and actual air inflow in the working process of an engine;
judging whether the actual oil injection quantity and the actual air inflow meet preset rationality conditions or not;
if not, controlling the power output of the engine to ensure the safety of the vehicle.
2. The method of claim 1, wherein determining whether the actual fuel injection quantity and the actual air intake quantity satisfy a preset rationality condition comprises:
determining an actual air-fuel ratio according to the actual fuel injection quantity and the actual air inflow;
obtaining an air-fuel ratio difference value through the actual air-fuel ratio and a preset theoretical air-fuel ratio;
and if the air-fuel ratio difference value does not meet the preset threshold value and the times that the air-fuel ratio difference value does not meet the preset threshold value meet the preset counting times, the actual oil injection amount and the actual air intake amount do not meet the preset rationality condition.
3. The method of claim 1, wherein before obtaining the actual fuel injection amount and the actual air intake amount during engine operation, the method further comprises:
and constructing an actual fuel injection quantity observation model according to the rail pressure change of the fuel rail, and obtaining the actual fuel injection quantity in the working process of the engine.
4. The method of claim 3, wherein the actual fuel injection quantity observation model is constructed by a process comprising:
acquiring rail pressure in the oil injection process of each cylinder to obtain rail pressure discrete data;
calculating to obtain the average rail pressure and rail pressure drop of each cylinder according to the rail pressure discrete data;
and constructing an actual fuel injection quantity observation model by using the average rail pressure and the rail pressure drop.
5. The method of claim 1, wherein constructing an actual fuel injection observation model using the average rail pressure and rail pressure drop comprises:
an actual fuel injection quantity observation model is constructed by adopting the following formula:
wherein Q is the actual fuel injection quantity, C1, C2, C3 and C4 are observation coefficients, P1 is the mean value of the average rail pressure of each cylinder, and P2 is the mean value of the rail pressure drop of each cylinder.
6. The method of claim 1, further comprising:
if so, determining the actual output torque according to the actual oil injection quantity and the actual air inflow;
judging whether the actual output torque meets a preset torque constraint condition or not;
if not, the power output of the engine is controlled to ensure the safety of the vehicle.
7. The method of claim 6, wherein determining an actual output torque based on the actual fuel injection amount and an actual air intake amount comprises:
determining a first output torque according to the actual fuel injection quantity and a preset engine rotating speed, and determining a second output torque according to the actual air intake quantity and the engine rotating speed;
and taking the maximum value of the first output torque and the second output torque as a target output torque, and calculating to obtain an actual output torque according to the target output torque and a predetermined additional torque characteristic.
8. An engine safety monitoring and detecting device, comprising:
the actual oil injection quantity and actual air inflow acquisition module is used for acquiring the actual oil injection quantity and the actual air inflow in the working process of the engine;
the device comprises an actual oil injection quantity and actual air inflow judging module, a control module and a control module, wherein the actual oil injection quantity and actual air inflow judging module is used for judging whether the actual oil injection quantity and the actual air inflow meet preset rationality conditions or not;
and the engine power output control module is used for controlling the power output of the engine if the engine power output control module does not meet the requirement so as to ensure the safety of the vehicle.
9. A computer-readable medium, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out an engine safety monitoring detection method according to any one of claims 1 to 7.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the engine safety monitoring detection method according to any one of claims 1 to 7 when executing the computer program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110454963.9A CN113062812B (en) | 2021-04-26 | 2021-04-26 | Engine safety monitoring and detecting method, device, medium and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110454963.9A CN113062812B (en) | 2021-04-26 | 2021-04-26 | Engine safety monitoring and detecting method, device, medium and electronic equipment |
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| CN113062812A true CN113062812A (en) | 2021-07-02 |
| CN113062812B CN113062812B (en) | 2022-08-05 |
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| CN114109691A (en) * | 2021-11-05 | 2022-03-01 | 东风汽车集团股份有限公司 | Engine fire path torque control method suitable for traditional vehicle and hybrid vehicle |
| CN114673603A (en) * | 2022-04-12 | 2022-06-28 | 中国第一汽车股份有限公司 | Safety monitoring method and device for engine control system, computer equipment and medium |
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| CN114109691A (en) * | 2021-11-05 | 2022-03-01 | 东风汽车集团股份有限公司 | Engine fire path torque control method suitable for traditional vehicle and hybrid vehicle |
| CN114109691B (en) * | 2021-11-05 | 2023-02-28 | 东风汽车集团股份有限公司 | Engine fire path torque control method suitable for traditional vehicle and hybrid vehicle |
| CN114673603A (en) * | 2022-04-12 | 2022-06-28 | 中国第一汽车股份有限公司 | Safety monitoring method and device for engine control system, computer equipment and medium |
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