CN112504681A - Engine Venturi carbon deposition detection method, device, equipment and storage medium - Google Patents
Engine Venturi carbon deposition detection method, device, equipment and storage medium Download PDFInfo
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- CN112504681A CN112504681A CN202011518671.9A CN202011518671A CN112504681A CN 112504681 A CN112504681 A CN 112504681A CN 202011518671 A CN202011518671 A CN 202011518671A CN 112504681 A CN112504681 A CN 112504681A
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- G01M15/00—Testing of engines
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- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
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Abstract
The invention discloses a method, a device, equipment and a storage medium for detecting carbon deposition of a venturi of an engine, wherein the method comprises the following steps: acquiring inlet pressure and outlet pressure of a gas compressor; acquiring the rotating speed of a supercharger; determining air intake quantity according to the rotating speed of the supercharger and the inlet pressure and the outlet pressure of the air compressor; determining a target exhaust gas amount according to the total air intake amount and the air intake amount of the intake manifold; acquiring the measured exhaust gas quantity measured by the Venturi; and determining whether carbon deposition occurs in the venturi according to the target air inflow and the measured exhaust gas amount. According to the embodiment of the invention, the condition of carbon deposition abnormity of the Venturi tube is obtained in real time, and the working efficiency of the engine is improved.
Description
Technical Field
The invention belongs to the technical field of engine detection, and particularly relates to a method, a device, equipment and a storage medium for detecting carbon deposition of a venturi of an engine.
Background
The EGR engine of venturi route measures the flow of exhaust gas recycled by venturi device, thus deducing the fresh intake air quantity required by the engine. However, the venturi differential pressure sensor accumulates a large amount of carbon due to long-time operation of the engine, so that the diameter of the venturi throat is reduced, the flow of the recycled exhaust gas drifts, finally, the deviation of the fresh air inflow is generated, and the working efficiency of the engine is influenced.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a storage medium for detecting carbon deposition of a venturi of an engine, which are used for realizing the real-time acquisition of the carbon deposition abnormal condition of the venturi and improving the working efficiency of the engine.
In a first aspect, an embodiment of the present invention provides a method for detecting engine venturi carbon deposition, including:
acquiring inlet pressure and outlet pressure of a gas compressor;
acquiring the rotating speed of a supercharger;
determining air intake quantity according to the rotating speed of the supercharger and the inlet pressure and the outlet pressure of the air compressor;
determining the target exhaust gas amount according to the total intake air amount of an intake manifold and the air intake air amount;
acquiring the measured exhaust gas quantity measured by the Venturi;
and determining whether carbon deposition occurs in the venturi according to the target air inflow and the measured exhaust gas amount.
Optionally, the determining whether carbon deposition occurs in the venturi according to the target intake air amount and the measured exhaust gas amount includes:
acquiring a measurement difference value between the target air inflow and the measured exhaust gas amount;
determining a preset difference value;
and determining whether carbon deposition occurs in the venturi according to the relation between the measurement difference and the preset difference.
Optionally, determining whether the venturi deposits carbon or not according to the relationship between the measurement difference and the preset difference includes:
and when the measurement difference value between the target air inflow and the measured exhaust gas amount is larger than or equal to the preset difference value, determining that carbon deposition occurs in the venturi.
Optionally, the determining the preset difference value includes:
and determining a preset difference value according to the rotating speed and the flow of the engine.
Optionally, the obtaining of the measured difference between the target intake air amount and the measured exhaust gas amount further comprises:
acquiring a correction curve;
and obtaining the measurement difference value according to the correction curve to obtain the correction coefficient.
Optionally, after obtaining the correction coefficient of the measurement difference according to the correction curve, the method further includes:
and obtaining a corrected exhaust gas amount according to the correction coefficient, the measured exhaust gas amount and the correction coefficient.
Optionally, after determining that carbon deposition occurs in the venturi, the method further includes: and sending out fault prompt information for prompting the venturi to generate carbon deposition.
In a second aspect, an embodiment of the present invention further provides an engine venturi carbon deposition detection apparatus, including:
the compressor pressure acquisition module is used for acquiring the inlet pressure and the outlet pressure of the compressor;
the supercharger rotating speed acquisition module is used for acquiring the rotating speed of the supercharger;
the air intake quantity determining module is used for determining the air intake quantity according to the rotating speed of the supercharger and the inlet pressure and the outlet pressure of the air compressor;
a target exhaust gas amount determination module for determining the target exhaust gas amount based on a total intake air amount of an intake manifold and the air intake air amount;
the measured exhaust gas quantity acquisition module is used for acquiring the measured exhaust gas quantity measured by the Venturi flowmeter;
and the judging module is used for determining whether carbon deposition occurs in the Venturi according to the target air inflow and the measured exhaust gas amount.
In a third aspect, an embodiment of the present invention further provides an electronic device, including:
at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the method of any one of the first aspects.
In a fourth aspect, the embodiments of the present invention also provide a computer-readable storage medium, in which computer-executable instructions are stored, and when a processor executes the computer-executable instructions, the method according to any one of the first aspect is implemented.
The detection method for carbon deposition of the venturi of the engine provided by the embodiment of the invention comprises the steps of acquiring the rotating speed of the air compressor by using the supercharger sensor, determining the air intake amount according to the pressure value ratio of the air compressor and the rotating speed of the air compressor, then determining the target exhaust gas amount according to the air intake amount and the total air intake amount of the air intake manifold, and finally determining whether the venturi tube is subjected to carbon deposition according to the relation between the measured exhaust gas amount measured by the venturi and the target exhaust gas amount.
Drawings
FIG. 1 is a schematic flow chart of a method for detecting carbon deposition in a venturi of an engine according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of another engine venturi carbon deposition detection method provided by the embodiment of the invention;
FIG. 3 is a schematic flow chart of another engine venturi carbon deposition detection method provided by the embodiment of the invention;
FIG. 4 is a schematic structural diagram of a venturi carbon deposition detection device of an engine according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic flow diagram of a venturi carbon deposition detection method of an engine according to an embodiment of the present invention, and as shown in fig. 1, the venturi carbon deposition detection method includes:
and S110, acquiring inlet pressure and outlet pressure of the compressor.
When the engine is in a relatively stable working state and an exhaust gas recycling system used by the engine is in a reasonable opening state, the amount of exhaust gas measured by the venturi device of the engine is more accurate. Along with the increase of the running mileage of the engine, the carbon deposition of the venturi tube of the engine is excessive, the diameter of the throat is reduced, the measured exhaust gas quantity measured by the venturi of the engine is reduced, the obtained real-time exhaust gas quantity deviation value delta m is overlarge, when the obtained real-time exhaust gas quantity deviation value delta m is larger than the maximum exhaust gas quantity deviation, the engine reports the fault of large exhaust gas quantity deviation, and the occurrence of the carbon deposition in the venturi of the engine can be known at the moment.
In order to obtain the real-time exhaust gas amount deviation value, a measured exhaust gas amount measured by a Venturi and a target exhaust gas amount of an engine intake manifold need to be obtained, and the target exhaust gas amount of the engine intake manifold needs to be obtained firstly. The air intake amount of an air intake manifold of the engine is determined by acquiring the inlet pressure and the outlet pressure of a compressor in the engine and the rotating speed of a supercharger.
Firstly, the inlet pressure and the outlet pressure of a compressor in an engine are obtained, and the pressure ratio epsilon between the outlet pressure and the inlet pressure is obtainedc：
Pc1-compressor inlet pressure;
Pc2-compressor outlet pressure.
And S120, acquiring the rotating speed of the supercharger.
The outer surface of the compressor is provided with the supercharger sensor, and when the compressor is in a working state, the rotating speed n of the compressor is obtained according to the supercharger sensor.
And S130, determining the air intake quantity according to the rotating speed of the supercharger and the inlet pressure and the outlet pressure of the air compressor.
After the rotating speed n of the supercharger and the inlet pressure and the outlet pressure of the air compressor are determined, the air intake quantity is determined according to the relationship between the air intake quantity and the rotating speed of the supercharger and the ratio between the inlet pressure and the outlet pressure of the air compressor, and the air intake quantity meets the following requirements:
mfresh＝f(n,εc)
n-supercharger speed.
And S140, determining a target exhaust gas amount according to the total intake air amount and the air intake air amount of the intake manifold.
Because the total air inflow of the engine intake manifold comprises the air inflow and the exhaust gas, after the total air inflow of the engine intake manifold and the air inflow are determined, the target exhaust gas amount entering the engine intake manifold can be obtained, wherein the total air inflow of the engine intake manifold can be obtained according to measurement of an intake temperature pressure sensor of the engine intake manifold, and the target exhaust gas amount can be obtained by subtracting the air inflow from the total air inflow of the engine intake manifold.
S150, acquiring the measured exhaust gas amount measured by the Venturi.
After the target exhaust gas quantity of the engine intake manifold is obtained, whether carbon deposition occurs in the venturi can be determined according to the size relation between the measured exhaust gas quantity measured by the venturi and the target exhaust gas quantity.
And S160, determining whether carbon deposition occurs in the Venturi according to the target air inflow and the measured exhaust gas amount.
For example, when the measured exhaust gas amount measured by the venturi is smaller than the target exhaust gas amount, it may be determined whether the venturi is soot-deposited or not by the target intake air amount and the measured exhaust gas amount because the amount of recyclable exhaust gas reaching the intake manifold is reduced by soot deposition at the throat of the venturi.
The detection method for carbon deposition of the venturi of the engine provided by the embodiment of the invention comprises the steps of acquiring the rotating speed of the air compressor by using the supercharger sensor, determining the air intake amount according to the pressure value ratio of the air compressor and the rotating speed of the air compressor, then determining the target exhaust gas amount according to the air intake amount and the total air intake amount of the air intake manifold, and finally determining whether the venturi tube is subjected to carbon deposition according to the relation between the measured exhaust gas amount measured by the venturi and the target exhaust gas amount.
Optionally, on the basis of the foregoing embodiment, fig. 2 is another engine venturi carbon deposition detection method provided in an embodiment of the present invention, as shown in fig. 2, the method includes:
and S210, acquiring a measurement difference value between the target intake air quantity and the measured exhaust gas quantity.
When the air intake quantity is determined according to the rotating speed of the supercharger and the inlet pressure and the outlet pressure of the air compressor, the target exhaust gas quantity of the engine in a normal working state is obtained according to the total air intake quantity measured by the temperature and pressure sensor of the air inlet manifold of the engine and the air intake quantity, and if the measured exhaust gas quantity measured by the venturi is different from the target air intake quantity, the measurement difference value between the target air intake quantity and the measured exhaust gas quantity is firstly obtained.
And S220, determining a preset difference value.
The preset difference value can be determined according to the rotating speed and the flow of the engine, illustratively, by setting the corresponding relation between the preset difference value and the rotating speed and the flow of the engine, after the rotating speed of the supercharger is obtained, the rotating speed of the engine can be determined at the moment, and the preset difference value corresponding to the current rotating speed is searched according to the rotating speed of the engine.
And S230, determining whether carbon deposition occurs in the Venturi according to the relation between the measurement difference value and a preset difference value.
The method comprises the steps of obtaining a preset difference value of exhaust gas quantity at a determined rotating speed, when a measurement difference value of target air inflow and measured exhaust gas quantity is larger than the preset difference value, indicating that a Venturi tube generates carbon deposition phenomenon under the long-time running state of an engine at the moment, and influencing the quantity of the exhaust gas which can be recycled and enters the engine through the Venturi tube.
Optionally, the method further includes: and when the measurement difference value between the target air inflow and the measured exhaust gas amount is larger than or equal to a preset difference value, determining that carbon deposition occurs in the venturi.
When venturi takes place the carbon deposit, this moment, the exhaust gas volume that reaches the engine through venturi can reduce, and then target air input can increase with the measurement difference of measuring the exhaust gas volume, when the measurement difference of target air input and measurement exhaust gas volume is greater than and predetermines the difference, explains that venturi takes place the carbon deposit phenomenon serious this moment, through the prompt message of real-time output venturi carbon deposit, guarantees that the staff receives the operating condition of engine in real time, improves the work efficiency of engine.
Optionally, on the basis of the foregoing embodiment, fig. 3 is a diagram of another engine venturi carbon deposition detection method provided by an embodiment of the present invention, as shown in fig. 3, the method includes:
and S310, acquiring a measurement difference value between the target intake air quantity and the measured exhaust gas quantity.
And S320, acquiring a correction curve.
S330, obtaining a correction coefficient of the measurement difference value according to the correction curve.
And S340, obtaining a corrected exhaust gas amount according to the correction coefficient and the measured exhaust gas amount.
After a measurement difference value between the target air inflow and the measured exhaust gas amount is obtained, the carbon deposition phenomenon of the venturi can be determined, a correction coefficient is determined according to the relation between the measurement difference value and the correction curve by obtaining a correction curve, then the measured exhaust gas amount is corrected through the correction coefficient to obtain the corrected exhaust gas amount, and the engine is guaranteed to work under a relatively stable working condition.
Optionally, the method further includes: and sending out fault prompt information for prompting the venturi to generate carbon deposition.
When the measurement difference value between the target air inflow and the measured exhaust gas amount is larger than or equal to the preset difference value, the venturi is determined to generate carbon deposition, the venturi is prompted to generate carbon deposition by sending out fault prompting information, and the fact that a worker can acquire the carbon deposition generating information of the venturi in real time is guaranteed.
Optionally, on the basis of the foregoing embodiment, fig. 4 is a schematic structural diagram of a venturi carbon deposition detection device of an engine according to an embodiment of the present invention, and as shown in fig. 4, the detection device includes: the device comprises a compressor pressure obtaining module 10 used for obtaining the inlet pressure and the outlet pressure of the compressor, a supercharger rotating speed obtaining module 20 used for obtaining the rotating speed of the supercharger, an air intake quantity determining module 30 used for determining the air intake quantity according to the rotating speed of the supercharger and the inlet pressure and the outlet pressure of the compressor, a target waste gas quantity determining module 40 used for determining the target waste gas quantity according to the total air intake quantity and the air intake quantity of an air intake manifold, a measured waste gas quantity obtaining module 50 used for obtaining the measured waste gas quantity measured by a Venturi flowmeter, and a judging module 60 used for determining whether carbon deposition occurs in the Venturi according to the target air intake quantity and the measured waste gas quantity.
According to the venturi carbon deposition detection device of the engine, the inlet pressure and the outlet pressure of the air compressor are obtained through the air compressor pressure obtaining module, the rotating speed of the air compressor is obtained through the supercharger rotating speed obtaining module, the air intake quantity of the air intake manifold of the engine is determined according to the pressure value ratio of the inlet pressure and the outlet pressure of the air compressor and the rotating speed of the air compressor, the target exhaust gas quantity is determined according to the air intake quantity and the total air intake quantity of the air intake manifold, and whether the venturi tube deposits carbon or not is determined according to the relation between the measured exhaust gas quantity measured by the venturi tube and the target exhaust gas quantity.
The engine Venturi carbon deposition detection device provided by the embodiment of the invention can execute the engine Venturi carbon deposition detection method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 5, the electronic device includes a processor 410, a memory 420, an input device 430, and an output device 440; the number of the processors 410 in the electronic device may be one or more, and one processor 410 is taken as an example in fig. 5; the processor 410, the memory 420, the input device 430 and the output device 440 in the electronic apparatus may be connected by a bus or other means, and the connection by the bus is exemplified in fig. 5.
The memory 420 serves as a computer readable storage medium for storing software programs, computer executable programs, and modules, such as program instructions/modules corresponding to the venturi carbon deposition detection method of the engine in the embodiment of the present invention. The processor 410 executes software programs, instructions and modules stored in the memory 420 to execute various functional applications and data processing of the electronic device, that is, to implement the engine venturi carbon deposition detection method provided by the embodiment of the present invention.
The memory 420 may mainly include a program storage area and a data storage area, wherein the program storage 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 memory 420 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, memory 420 may further include memory located remotely from processor 410, which may be connected to an electronic device over 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 device 430 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the electronic apparatus, and may include a keyboard, a mouse, and the like. The output device 440 may include a display device such as a display screen.
The present embodiments also provide a storage medium containing computer-executable instructions for implementing the methods provided by the embodiments of the present invention when executed by a computer processor.
Of course, the storage medium provided by the embodiment of the present invention contains computer-executable instructions, and the computer-executable instructions are not limited to the operations of the method described above, and may also execute the operations related to the method provided by any embodiment of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the venturi carbon deposition detection device for the engine, the units and modules included in the embodiment are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention 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 invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A venturi carbon deposition detection method of an engine is characterized by comprising the following steps:
acquiring inlet pressure and outlet pressure of a gas compressor;
acquiring the rotating speed of a supercharger;
determining air intake quantity according to the rotating speed of the supercharger and the inlet pressure and the outlet pressure of the air compressor;
determining the target exhaust gas amount according to the total intake air amount of an intake manifold and the air intake air amount;
acquiring the measured exhaust gas quantity measured by the Venturi;
and determining whether carbon deposition occurs in the venturi according to the target air inflow and the measured exhaust gas amount.
2. The engine venturi carbon deposition detection method of claim 1, wherein the determining whether carbon deposition occurs in the venturi according to the target intake air amount and the measured exhaust gas amount comprises:
acquiring a measurement difference value between the target air inflow and the measured exhaust gas amount;
determining a preset difference value;
and determining whether carbon deposition occurs in the venturi according to the relation between the measurement difference and the preset difference.
3. The engine venturi carbon deposition detection method of claim 2, wherein the determining whether carbon deposition occurs in the venturi according to the relationship between the measurement difference and the preset difference comprises:
and when the measurement difference value between the target air inflow and the measured exhaust gas amount is larger than or equal to the preset difference value, determining that carbon deposition occurs in the venturi.
4. The engine venturi carbon deposition detection method of claim 2, wherein the determining a preset difference value comprises:
and determining a preset difference value according to the rotating speed and the flow of the engine.
5. The engine venturi carbon deposition detection method of claim 2, further comprising, after obtaining the measured difference between the target intake air amount and the measured exhaust gas amount:
acquiring a correction curve;
and acquiring a correction coefficient of the measurement difference value according to the correction curve.
6. The engine venturi carbon deposition detection method of claim 5, further comprising, after obtaining the correction coefficient of the measurement difference according to the correction curve:
and obtaining a corrected exhaust gas amount according to the correction coefficient and the measured exhaust gas amount.
7. The engine venturi carbon deposition detection method of claim 1, after determining that carbon deposition occurs in the venturi, further comprising: and sending out fault prompt information for prompting the venturi to generate carbon deposition.
8. The utility model provides an engine venturi carbon deposit detection device which characterized in that includes:
the compressor pressure acquisition module is used for acquiring the inlet pressure and the outlet pressure of the compressor;
the supercharger rotating speed acquisition module is used for acquiring the rotating speed of the supercharger;
the air intake quantity determining module is used for determining the air intake quantity according to the rotating speed of the supercharger and the inlet pressure and the outlet pressure of the air compressor;
the target exhaust gas quantity determining module is used for determining a target exhaust gas quantity according to the total air intake quantity of an intake manifold and the air intake quantity;
the measured exhaust gas quantity acquisition module is used for acquiring the measured exhaust gas quantity measured by the Venturi flowmeter;
and the judgment module is used for determining whether carbon deposition occurs in the Venturi according to the target air inflow and the measured waste gas amount.
9. An electronic device, comprising:
at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the method of any of claims 1-7.
10. A computer-readable storage medium having computer-executable instructions stored thereon which, when executed by a processor, implement the method of any one of claims 1 to 7.
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