CN111927640B - Engine fault detection method, device, equipment and computer readable storage medium - Google Patents
Engine fault detection method, device, equipment and computer readable storage medium Download PDFInfo
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- CN111927640B CN111927640B CN202010839619.7A CN202010839619A CN111927640B CN 111927640 B CN111927640 B CN 111927640B CN 202010839619 A CN202010839619 A CN 202010839619A CN 111927640 B CN111927640 B CN 111927640B
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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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
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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
- F02D41/30—Controlling fuel injection
- F02D41/3005—Details not otherwise provided for
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
Abstract
The present disclosure provides a method, apparatus, device and computer readable storage medium for engine fault detection, the method comprising: calculating a first fuel gas injection quantity and a second fuel gas injection quantity of a target engine according to the operating parameters of the target engine; calculating a deviation index of the target engine according to the first fuel gas injection quantity and the second fuel gas injection quantity; and determining whether the air inlet system of the target engine has a fault according to the deviation index. Since the actual air amount, the air-fuel ratio, and the preset required torque of the engine can be acquired after the engine is operated, the first fuel injection amount and the second fuel injection amount can be calculated, and the deviation index can be calculated, it is possible to perform failure detection of the intake system of the engine without considering the rotation speed and load conditions of the engine. The technical problem that whether the engine air inlet system breaks down or not cannot be detected when the rotating speed and the load condition of the engine cannot reach the detection range in the prior art is effectively solved.
Description
Technical Field
The present disclosure relates to the field of fault detection, and in particular, to a method, an apparatus, a device, and a computer-readable storage medium for engine fault detection.
Background
Parts such as air filter, booster and admission line of engine air intake system take place to block up, gas leakage or jamming scheduling problem easily in the use, lead to the engine resistance of admitting air to increase, influence engine performance index, can lead to the engine unable start-up and operation when serious, consequently need detect because of the relevant part of engine air intake system blocks up, gas leakage, the trouble that the booster jamming arouses.
In order to detect faults of an engine caused by blockage, air leakage and supercharger clamping stagnation of related components of an air intake system, whether the air intake system of the engine has faults is generally judged by calculating the required supercharging pressure and the actual supercharging pressure of the engine in the prior art. It is determined that the intake system is malfunctioning when the required boost pressure and the actual boost pressure of the engine are not equal.
However, when the method is used for detecting the fault of the engine intake system, the engine can be detected only when the engine meets certain rotating speed and load conditions, but when the engine intake system is blocked, air leakage is serious or a supercharger is blocked and lagged, the rotating speed and the load conditions of the engine cannot reach the detection range, so that whether the engine intake system is in fault or not cannot be judged by comparing whether the required supercharging pressure and the actual supercharging pressure of the engine are equal or not.
Disclosure of Invention
The present disclosure provides an engine fault detection method, apparatus, device and computer readable storage medium, which are used to solve the technical problem that the existing engine fault detection method cannot detect whether an engine intake system fails when the engine speed and load conditions cannot reach the detection range.
A first aspect of the present disclosure is to provide an engine fault detection method, including:
acquiring operation parameters generated in the operation process of a target engine, wherein the operation parameters comprise an actual air quantity and an air-fuel ratio;
calculating a first fuel gas injection quantity corresponding to the target engine according to the operation parameters, and calculating a second fuel gas injection quantity corresponding to the target engine according to the air-fuel ratio and a preset required torque;
calculating a deviation index corresponding to the target engine according to the first fuel gas injection quantity and the second fuel gas injection quantity;
and determining whether the air inlet system of the target engine has a fault according to the deviation index.
Optionally, the operation parameters further include an accelerator opening degree of the target engine, a starting state, and an electrical fault state of an air intake system of the target engine;
the calculating a first fuel gas injection amount corresponding to the target engine according to the operation parameters and a second fuel gas injection amount corresponding to the target engine according to the air-fuel ratio and a preset required torque includes:
detecting whether the target engine meets a preset fault detection condition or not according to the operation parameters;
and if so, calculating a first fuel gas injection quantity and a second fuel gas injection quantity corresponding to the target engine according to the operation parameters.
Optionally, the detecting whether the target engine meets a preset fault detection condition according to the operating parameter includes:
detecting whether the target engine runs or not according to the starting state; and/or the presence of a gas in the gas,
detecting whether the target engine is in a steady-state working condition or not according to the opening degree of the accelerator; and/or the presence of a gas in the atmosphere,
detecting whether the air inlet system of the target engine has an electrical fault according to the electrical fault state of the air inlet system of the target engine to obtain a detection result;
and determining whether the target engine meets a preset fault detection condition or not according to the detection result.
Optionally, the determining whether the target engine meets a preset fault detection condition according to the detection result includes:
and if the target engine is in a running state, and/or the target engine is in a steady-state working condition, and/or the target engine has no electrical fault, determining that the target engine meets a preset fault detection condition.
Optionally, the calculating a deviation index corresponding to the target engine according to the first fuel gas injection amount and a preset second fuel gas injection amount includes:
determining a difference between the first and second injected amounts of gas;
and calculating an integral accumulated value of the ratio of the difference value to the first fuel gas injection quantity in a preset time interval to obtain the deviation index.
Optionally, the determining whether the intake system of the target engine is faulty according to the deviation index includes:
and if the deviation index is not larger than a preset threshold value, judging that the air intake system of the target engine has a fault.
Optionally, after determining whether the intake system of the target engine is faulty according to the deviation index, the method further includes:
and if the air inlet system of the target engine fails, controlling the target engine to perform fault reminding operation, or sending fault reminding information to terminal equipment of operation and maintenance personnel.
A second aspect of the present disclosure is to provide an engine failure detection apparatus, including:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring operation parameters generated in the operation process of a target engine, and the operation parameters comprise an actual air quantity and an air-fuel ratio;
the first calculation module is used for calculating a first fuel gas injection amount corresponding to the target engine according to the operation parameters and calculating a second fuel gas injection amount corresponding to the target engine according to the air-fuel ratio and a preset required torque;
the second calculation module is used for calculating a deviation index corresponding to the target engine according to the first fuel gas injection quantity and the second fuel gas injection quantity;
a determination module to determine whether an intake system of the target engine is malfunctioning based on the deviation index.
Optionally, the operation parameters further include an accelerator opening degree and a starting state of the target engine and an electrical fault state of an air intake system of the target engine;
the first computing module includes:
the detection unit is used for detecting whether the target engine meets a preset fault detection condition or not according to the operation parameters;
and the first calculation unit is used for calculating a first fuel gas injection amount and a second fuel gas injection amount corresponding to the target engine according to the operation parameters if the target engine meets preset fault detection conditions.
Optionally, the detecting unit is configured to:
detecting whether the target engine runs or not according to the starting state; and/or the presence of a gas in the gas,
detecting whether the target engine is in a steady-state working condition or not according to the opening degree of the accelerator; and/or the presence of a gas in the atmosphere,
detecting whether the air inlet system of the target engine has an electrical fault according to the electrical fault state of the air inlet system of the target engine to obtain a detection result;
and determining whether the target engine meets a preset fault detection condition or not according to the detection result.
Optionally, the determining, according to the detection result, whether the target engine meets a preset fault detection condition includes:
and if the target engine is in a running state, and/or the target engine is in a steady-state working condition, and/or the target engine has no electrical fault, determining that the target engine meets a preset fault detection condition.
Optionally, the second calculating module includes:
a determination unit for determining a difference between the first gas injection amount and the second gas injection amount;
and the second calculating unit is used for calculating an integral accumulated value of the ratio of the difference value to the first fuel gas injection amount in a preset time interval to obtain the deviation index.
Optionally, the determining module is configured to:
and if the deviation index is not larger than a preset threshold value, judging that the air intake system of the target engine has a fault.
Optionally, the apparatus further comprises:
and the control module is used for controlling the target engine to perform fault reminding operation or sending fault reminding information to terminal equipment of operation and maintenance personnel if the air inlet system of the target engine fails.
A third aspect of the present disclosure is to provide an engine failure detection apparatus, including: a memory, a processor;
a memory; a memory for storing the processor-executable instructions;
wherein the processor is configured to invoke program instructions in the memory to perform the engine fault detection method of the first aspect.
A fourth aspect of the present disclosure is to provide a computer-readable storage medium having stored therein computer-executable instructions for implementing the engine fault detection method of the first aspect when executed by a processor.
According to the engine fault detection method, the device, the equipment and the computer readable storage medium, the first fuel gas injection quantity and the second fuel gas injection quantity corresponding to the target engine are calculated, so that the deviation index corresponding to the target engine can be calculated according to the first fuel gas injection quantity and the second fuel gas injection quantity, and whether the air inlet system of the target engine is in fault or not is determined by using the deviation index. Since the actual air quantity, the air-fuel ratio and the preset required torque of the engine can be obtained after the engine is operated, the first fuel gas injection quantity and the second fuel gas injection quantity are calculated, and the deviation index can be calculated, the fault detection of the air intake system of the engine can be realized without considering the rotating speed and the load condition of the engine. The technical problem that whether the engine air inlet system breaks down or not cannot be detected when the rotating speed and the load condition of the engine cannot reach the detection range in the prior art is effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure 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 described below, and it is obvious that the drawings in the following description are some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic diagram of a network architecture upon which the present disclosure is based;
FIG. 2 is a schematic flow chart illustrating a method for detecting engine faults according to an embodiment of the present disclosure;
FIG. 3 is a schematic flow chart diagram of a method for detecting engine faults according to a second embodiment of the disclosure;
FIG. 4 is a schematic flow chart of a method for detecting engine faults according to a third embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an engine fault detection apparatus according to a fourth embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of an engine fault detection apparatus provided in the fifth embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of an engine fault detection apparatus according to a sixth embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of an engine fault detection apparatus according to a seventh embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments obtained based on the embodiments in the present disclosure belong to the protection scope of the present disclosure.
In order to solve the technical problem that the existing engine fault detection method cannot detect whether the engine air intake system fails when the engine speed and load conditions do not reach the detection range, the disclosure provides an engine fault detection method, an engine fault detection device, engine fault detection equipment and a computer readable storage medium.
It should be noted that the engine fault detection method, apparatus, device and computer readable storage medium provided by the present disclosure may be applied in various engine fault detection scenarios.
In the prior art, in order to detect a fault of an intake system of an engine, it is generally determined whether the intake system of the engine fails by calculating a required boost pressure and an actual boost pressure of the engine when a rotation speed and a load condition of the engine reach a detection range. It is determined that the intake system is malfunctioning when the required boost pressure and the actual boost pressure of the engine are not equal. However, when the engine intake system is seriously blocked or the supercharger is stuck late, and the engine speed and load conditions cannot reach the detection range, when the engine intake system fault detection is performed by adopting the method, whether the engine intake system fails or not cannot be detected when the engine speed and load conditions cannot reach the detection range.
In order to detect a failure in the intake system of the engine when the engine speed and load conditions do not reach the detection range, the inventors have found through research that the first and second fuel injection amounts may be calculated by acquiring the actual air amount, the required torque, and the air-fuel ratio after the engine is started, a deviation index may be determined based on the first and second fuel injection amounts, and whether the engine intake system has a failure may be determined based on the deviation index. Whether the air intake system is in failure or not is judged by utilizing the first fuel gas injection quantity and the second fuel gas injection quantity, so that the condition range of engine failure detection is expanded, and the failure detection can be carried out on the air intake system of the engine when the rotating speed and the load condition of the engine do not reach the detection range.
Fig. 1 is a schematic diagram of a network architecture based on the present disclosure, and as shown in fig. 1, the network architecture based on the present disclosure at least includes: an engine 1 and a server 2. The server 2 is provided with an engine fault detection device which can be written in languages such as C/C + +, Java, Shell or Python. The engine 1 is in communication connection with the server 2, so that the server 2 can perform information interaction with the engine 1.
The technical solution of the present disclosure is explained in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 2 is a schematic flow chart of an engine fault detection method according to a first embodiment of the present disclosure, as shown in fig. 2, the method includes:
The execution subject of the present embodiment is an engine failure detection device provided in the server. The server may be communicatively coupled to the engine to enable information interaction with the engine.
In this embodiment, the engine fault detection apparatus may send an operation parameter obtaining instruction to the target engine according to a preset time period, so as to obtain an operation parameter generated during an operation process of the target engine. The operating parameters may also be obtained from the target engine in response to a user-triggered operation, as the present disclosure is not limited in this respect.
The operating parameters include an actual air amount and an air-fuel ratio. The actual air amount refers to the amount of air actually supplied when fuel is burned without a failure of the intake system of the engine. Air-fuel ratio refers to the ratio of the mass of air to the mass of fuel in a combustible mixture in the intake system of an engine.
102, calculating a first fuel gas injection amount corresponding to the target engine according to the operation parameters, and calculating a second fuel gas injection amount corresponding to the target engine according to the air-fuel ratio and a preset required torque.
In the present embodiment, the required air amount of the target engine can be obtained from the required torque lookup preset map, the second fuel injection amount can be calculated from the required air amount and the air-fuel ratio, and the first fuel injection amount can be calculated from the actual air amount and the air-fuel ratio. The second fuel gas injection quantity is the required fuel gas injection quantity of the target engine, and the first fuel gas injection quantity is the actual natural gas injection quantity which is calculated according to the actual air quantity and the air-fuel ratio under the condition that an air intake system of the target engine has no fault.
And 103, calculating a deviation index corresponding to the target engine according to the first fuel gas injection quantity and the second fuel gas injection quantity.
In the present embodiment, when the target engine intake system is not malfunctioning, the first fuel gas injection amount and the second fuel gas injection amount are approximately equal, and when the deviation between the first fuel gas injection amount and the second fuel gas injection amount is large, the target engine intake system is malfunctioning. Therefore, the deviation index corresponding to the target engine can be calculated from the first fuel injection amount and the second fuel injection amount. The deviation index can accurately indicate whether the engine air inlet system has faults or not.
Compared with the prior art that whether the air intake system of the engine fails or not is judged by calculating the required boost pressure and the actual boost pressure of the engine when the rotating speed and the load condition of the engine reach the detection range, the air intake system of the engine can be more accurately judged whether to fail or not in the running process of the engine by using the deviation index calculated by the first fuel gas injection quantity and the second fuel gas injection quantity on the premise of not limiting the rotating speed and the load condition of the engine. The problem that whether the engine air inlet system breaks down or not cannot be judged when the rotating speed and the load condition of the engine cannot reach the detection range in the prior art is solved.
And 104, determining whether the air inlet system of the target engine is in failure according to the deviation index.
In the present embodiment, the deviation index can accurately characterize the degree of deviation between the first and second fuel injection amounts of the target engine within the preset time interval, and the deviation index can accurately characterize the state of the engine intake system. Therefore, whether the intake system of the target engine is malfunctioning can be determined from the deviation index.
According to the engine fault detection method provided by the embodiment, the first fuel gas injection quantity and the second fuel gas injection quantity are calculated according to the actual air quantity, the air-fuel ratio and the preset required torque generated in the engine operation process, and the first fuel gas injection quantity and the second fuel gas injection quantity can be obtained through calculation after the engine is operated, so that the deviation index of the first fuel gas injection quantity and the second fuel gas injection quantity can accurately represent the state of an engine air intake system, and whether the engine air intake system is in fault can be accurately judged on the premise of not limiting the engine speed and the load condition.
Optionally, on the basis of the first embodiment, the operation parameters further include an accelerator opening degree of the target engine, a starting state, and an electrical failure state of an intake system of the target engine.
Fig. 3 is a schematic flow chart of a method for detecting a fault of an engine according to a second embodiment of the present disclosure, where on the basis of the first embodiment, step 102 specifically includes:
and step 201, detecting whether the target engine meets a preset fault detection condition or not according to the operation parameters.
And 202, if the target engine fuel injection quantity is met, calculating a first fuel injection quantity and a second fuel injection quantity corresponding to the target engine according to the operation parameters.
In the present embodiment, it is necessary to determine whether or not the target engine satisfies the fault detection condition before the fault detection of the target engine. Whether the target engine satisfies the fault detection condition can be judged according to the accelerator opening degree and the starting state of the target engine and the electrical fault state of the air inlet system of the target engine. If the target engine satisfies the failure detection condition, a first fuel injection amount is calculated from the actual air amount, the air-fuel ratio, and a second fuel injection amount is calculated from the air-fuel ratio and the required torque.
Specifically, the calculation formula of the first fuel gas injection amount is as follows: q gas1 ＝Q air1 ×α stoic ×α desired Calculation of the second gas injection quantityThe formula is as follows: q gas2 ＝Q air2 ×α stoic ×α desired Wherein Q is gas1 For the first gas injection quantity, Q gas2 For the second fuel injection quantity, Q air1 Is the actual air quantity, Q air2 For the required air quantity, α stoic Is an equivalence ratio, α desired Is the air-fuel ratio.
The operation parameters further include an accelerator opening degree, a starting state, and an electrical failure state of an intake system of the target engine. The accelerator opening, also called throttle opening, is controlled by an accelerator pedal and is used to control the fuel gas injection amount of the engine. The start state indicates whether the engine is currently in an operating state. The electrical fault condition is indicative of whether the engine is currently experiencing an electrical fault, wherein the electrical fault includes one or more of a sensor fault, a supercharger fault, and a gas exchange valve fault.
The engine failure detection method provided by the present embodiment determines whether the first fuel gas injection amount and the second fuel gas injection amount need to be calculated by detecting whether the engine satisfies the failure detection condition, and can effectively reduce the power consumption of the engine failure detection apparatus because the first fuel gas injection amount and the second fuel gas injection amount need not be calculated when the engine does not satisfy the failure detection condition.
Optionally, on the basis of any of the foregoing embodiments, step 201 specifically includes:
detecting whether the target engine runs or not according to the starting state; and/or the presence of a gas in the atmosphere,
detecting whether the target engine is in a steady-state working condition or not according to the opening degree of the accelerator; and/or the presence of a gas in the gas,
and detecting whether the air inlet system of the target engine has an electrical fault according to the electrical fault state of the air inlet system of the target engine to obtain a detection result.
And determining whether the target engine meets a preset fault detection condition or not according to the detection result.
Further, on the basis of any one of the above embodiments, the determining whether the target engine satisfies a preset fault detection condition according to the detection result includes:
and if the target engine is in a running state, and/or the target engine is in a steady-state working condition, and/or the target engine has no electrical fault, determining that the target engine meets a preset fault detection condition.
In this embodiment, if the starting state of the target engine is at a high level, the target engine is currently in the running state, whereas if the starting state of the target engine is at a low level, the target engine is currently in the stopping state. If the accelerator opening of the target engine is stable, the target engine is represented to be in a steady-state working condition currently, and otherwise, if the accelerator opening of the target engine is unstable, the target engine is represented to be in a transient working condition currently. And if one or more devices of a sensor, a supercharger and a gas exchange valve of the target engine are in failure, indicating that the target engine has an electrical failure, and conversely, when none of the sensor, the supercharger and the gas exchange valve of the target engine has the failure, indicating that the target engine has no electrical failure.
Before the failure detection of the target engine, it is necessary to detect whether the target engine has started, and if the target engine has not started, the failure detection cannot be performed. In addition, the operating condition of the target engine needs to be considered, because it is normal that the difference exists between the first fuel injection quantity and the second fuel injection quantity of the target engine in the transient operating condition. Therefore, fault detection of the target engine requires the target engine to be in a non-transient condition, i.e., a steady-state condition. If the target engine has an electrical fault, the second fuel gas injection amount is affected, and the first fuel gas injection amount and the second fuel gas injection amount are different, so that the target engine is required to have no electrical fault when the target engine is subjected to fault detection.
When the target engine meets one or more of conditions of being in a running state, being in a steady-state working condition, and being free of electrical faults, it is determined that the target engine meets preset fault detection conditions.
The engine fault detection method provided by the embodiment judges whether the target engine meets the preset fault detection condition by judging whether the target engine is in a running state, a steady-state working condition or not and whether an electrical fault exists or not. Because the target engine is not in the running state and the steady-state working condition, and the fault detection of the target engine can be influenced by the existence of electrical faults, the three conditions can be used as fault detection conditions to effectively judge whether the current moment is suitable for fault detection of the target engine, and the error rate of the fault detection of the engine is reduced.
Fig. 4 is a schematic flow chart of a method for detecting a fault of an engine according to a third embodiment of the present disclosure, where on the basis of any of the embodiments, step 103 specifically includes:
and 301, determining a difference value between the first fuel gas injection quantity and the second fuel gas injection quantity.
And 302, calculating an integral accumulated value of the ratio of the difference value to the first fuel gas injection amount within a preset time interval to obtain the deviation index.
In the present embodiment, the first fuel gas injection amount is defined as a, the second fuel gas injection amount is defined as B, and the deviation index is defined as C. The deviation index C is calculated by
Wherein t is a preset time interval and represents the time when the integration function is enabled each time. The initial value of the deviation index C is set to 1.
The engine failure detection method provided by the embodiment determines the deviation index of the target engine by performing integral calculation on the ratio of the difference between the first fuel gas injection amount and the second fuel gas injection amount to the first fuel gas injection amount within a preset time interval. Since the deviation index is the integral accumulated value of the ratio of the difference value between the first fuel gas injection quantity and the second fuel gas injection quantity to the first fuel gas injection quantity in the preset time interval, the deviation index can accurately represent the deviation degree of the first fuel gas injection quantity and the second fuel gas injection quantity of the target engine in the preset time interval, and the accuracy of the deviation index is improved.
Further, on the basis of any of the above embodiments, the step 104 specifically includes:
and if the deviation index is not larger than a preset threshold value, judging that the air intake system of the target engine breaks down.
In this embodiment, if the deviation index of the target engine is not greater than the preset threshold, the deviation between the first fuel gas injection amount and the second fuel gas injection amount of the target engine is large, which indicates that the intake system of the target engine is abnormal, that is, the intake system of the target engine is failed.
The engine failure detection method provided by the present embodiment determines whether the intake system of the target engine has failed by using a deviation index determined by the first fuel injection amount and the second fuel injection amount of the target engine. The deviation index can accurately represent the deviation degree of the first fuel gas injection quantity and the second fuel gas injection quantity, so that the fault state of the target engine air inlet system can be accurately represented. Furthermore, whether the engine air inlet system breaks down or not can be accurately judged on the premise of not limiting the rotating speed and the load condition of the engine.
Further, on the basis of any one of the above embodiments, after determining whether the intake system of the target engine is faulty according to the deviation index, the method further includes:
and if the air inlet system of the target engine fails, controlling the target engine to perform fault reminding operation, or sending fault reminding information to terminal equipment of operation and maintenance personnel.
In the embodiment, when the target engine fails, the engine failure detection device can control the target engine to perform failure notification. The fault reminding mode may be that the control target engine sends fault reminding information to a terminal device of an operation and maintenance worker, and the terminal device includes an electronic device which can communicate with the engine, such as a mobile phone, a tablet, a computer, and the like. The fault reminding mode can also be a mode of giving an alarm for a loudspeaker installed on the control target engine, and can also be a mode of giving a prompt for flickering of an indicator lamp installed on the control target engine, which is not limited by the disclosure.
According to the engine fault detection method provided by the embodiment, when the target engine air inlet system breaks down, the target engine can be controlled to carry out fault reminding, operation and maintenance personnel can be intuitively prompted to overhaul the target engine, and the working efficiency of the operation and maintenance personnel is improved.
Fig. 5 is a schematic structural diagram of a device for detecting a fault of an engine according to a fourth embodiment of the present disclosure, and as shown in fig. 5, the device for detecting a fault of an engine includes: the device comprises an acquisition module 51, a first calculation module 52, a second calculation module 53 and a determination module 54. Wherein:
an acquisition module 51 for acquiring operating parameters generated during target engine operation, wherein the operating parameters include an actual air amount and an air-fuel ratio;
the first calculation module 52 is configured to calculate a first fuel gas injection amount corresponding to the target engine according to the operating parameter, and calculate a second fuel gas injection amount corresponding to the target engine according to the air-fuel ratio and a preset required torque;
a second calculating module 53, configured to calculate a deviation index corresponding to the target engine according to the first fuel gas injection amount and the second fuel gas injection amount;
a determination module 54 determines whether an intake system of the target engine is malfunctioning based on the deviation index.
According to the engine fault detection device provided by the embodiment, the first fuel gas injection quantity and the second fuel gas injection quantity are calculated according to the actual air quantity, the air-fuel ratio and the preset required torque generated in the engine operation process, and the first fuel gas injection quantity and the second fuel gas injection quantity can be obtained through calculation after the engine is operated, so that the deviation index of the first fuel gas injection quantity and the second fuel gas injection quantity can accurately represent the state of an engine air intake system, and whether the engine air intake system has a fault can be accurately judged on the premise of not limiting the rotation speed and the load condition of the engine.
Optionally, on the basis of the above embodiment, the operation parameters further include an accelerator opening degree of the target engine, a starting state, and an electrical fault state of an intake system of the target engine.
Fig. 6 is a schematic structural diagram of a device for detecting a fault of an engine according to a fifth embodiment of the present disclosure, and as shown in fig. 6, the first calculating module 52 includes:
the detection unit 61 is used for detecting whether the target engine meets a preset fault detection condition or not according to the operation parameters;
and a first calculating unit 62, configured to calculate, according to the operation parameter, a first fuel gas injection amount and a second fuel gas injection amount corresponding to the target engine if the target engine meets a preset fault detection condition.
The engine failure detection apparatus provided by the present embodiment determines whether the first fuel injection amount and the second fuel injection amount need to be calculated by detecting whether the engine satisfies the failure detection condition, and can effectively reduce the power consumption of the engine failure detection apparatus because the first fuel injection amount and the second fuel injection amount need not be calculated when the engine does not satisfy the failure detection condition.
Optionally, on the basis of any of the above embodiments, the detection unit is configured to:
detecting whether the target engine runs or not according to the starting state; and/or detecting whether the target engine is in a steady-state working condition or not according to the opening degree of the accelerator; and/or detecting whether the air inlet system of the target engine has an electrical fault according to the electrical fault state of the air inlet system of the target engine to obtain a detection result; and determining whether the target engine meets a preset fault detection condition or not according to the detection result.
Further, on the basis of any one of the above embodiments, the determining whether the target engine satisfies a preset fault detection condition according to the detection result includes: and if the target engine is in a running state, and/or the target engine is in a steady-state working condition, and/or the target engine has no electrical fault, determining that the target engine meets a preset fault detection condition.
The engine fault detection device provided by the embodiment judges whether the target engine meets the preset fault detection condition by judging whether the target engine is in a running state, a steady-state working condition and an electrical fault. Because the target engine is not in the running state and the steady-state working condition, and the fault detection of the target engine can be influenced by the existence of electrical faults, the three conditions can be used as fault detection conditions to effectively judge whether the current moment is suitable for fault detection of the target engine, and the error rate of the fault detection of the engine is reduced.
Fig. 7 is a schematic structural diagram of a device for detecting a fault of an engine according to a sixth embodiment of the present disclosure, and as shown in fig. 7, the second calculation module 53 includes:
a determination unit 71 for determining a difference between the first gas injection amount and the second gas injection amount;
and the second calculating unit 72 is configured to calculate an integral accumulated value of a ratio of the difference to the first gas injection amount within a preset time interval, so as to obtain the deviation index.
The engine failure detection apparatus provided in the present embodiment determines the deviation index of the target engine by performing integral calculation of the ratio of the difference between the first fuel gas injection amount and the second fuel gas injection amount to the first fuel gas injection amount within a preset time interval. Since the deviation index is the integral accumulated value of the ratio of the difference value between the first fuel gas injection quantity and the second fuel gas injection quantity to the first fuel gas injection quantity in the preset time interval, the deviation index can accurately represent the deviation degree of the first fuel gas injection quantity and the second fuel gas injection quantity of the target engine in the preset time interval, and the accuracy of the deviation index is improved.
Further, on the basis of any of the above embodiments, the determining module 54 is configured to:
and if the deviation index is not larger than a preset threshold value, judging that the air intake system of the target engine has a fault.
The engine failure detection apparatus provided by the present embodiment determines whether the intake system of the target engine has failed by using the deviation index determined by the first fuel injection amount and the second fuel injection amount of the target engine. The deviation index can accurately represent the deviation degree of the first fuel gas injection quantity and the second fuel gas injection quantity, so that the fault state of the target engine air inlet system can be accurately represented. Furthermore, whether the engine air inlet system breaks down or not can be accurately judged on the premise of not limiting the rotating speed and the load condition of the engine.
Further, on the basis of any one of the above embodiments, the apparatus further includes: and the control module is used for controlling the target engine to perform fault reminding operation or sending fault reminding information to terminal equipment of operation and maintenance personnel if the air inlet system of the target engine fails.
The engine fault detection device that this embodiment provided, when target engine air intake system broke down, can control the target engine and carry out the trouble and remind, the suggestion fortune dimension personnel that can be audio-visual need overhaul the target engine, improves fortune dimension personnel's work efficiency.
Fig. 8 is a schematic structural diagram of an engine fault detection device according to a seventh embodiment of the present disclosure, and as shown in fig. 8, the false international number identification device includes: a memory 81, a processor 82;
the memory 81 stores programs. In particular, the program may include program code comprising computer operating instructions. The memory 81 may comprise high-speed RAM memory, and may also include non-volatile memory, such as at least one disk memory.
The processor 82 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement the embodiments of the present disclosure.
Alternatively, in a specific implementation, if the memory 81 and the processor 82 are implemented independently, the memory 81 and the processor 82 may be connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 8, but this is not intended to represent only one bus or type of bus.
Alternatively, in a specific implementation, if the memory 81 and the processor 82 are implemented on one chip, the memory 81 and the processor 82 may complete the same communication through an internal interface.
Another embodiment of the present disclosure also provides a computer-readable storage medium, in which computer-executable instructions are stored, and when executed by a processor, the computer-executable instructions are used for implementing the engine fault detection method according to any one of the above embodiments.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus described above may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present disclosure, and not for limiting the same; while the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.
Claims (16)
1. An engine fault detection method, comprising:
acquiring operating parameters generated in the operation process of a target engine, wherein the operating parameters comprise an actual air quantity and an air-fuel ratio;
calculating a first fuel gas injection amount corresponding to the target engine according to the operation parameters, and calculating a second fuel gas injection amount corresponding to the target engine according to the air-fuel ratio and a preset required torque;
calculating a deviation index corresponding to the target engine according to the first fuel gas injection quantity and the second fuel gas injection quantity;
and determining whether the air inlet system of the target engine has a fault according to the deviation index.
2. The method of claim 1, wherein the operating parameters further include a throttle opening, a start state, and an electrical fault state of an air intake system of the target engine;
the calculating a first fuel gas injection amount corresponding to the target engine according to the operation parameters and a second fuel gas injection amount corresponding to the target engine according to the air-fuel ratio and a preset required torque comprises:
detecting whether the target engine meets a preset fault detection condition or not according to the operation parameters;
and if so, calculating a first fuel gas injection quantity corresponding to the target engine according to the operation parameters, and calculating a second fuel gas injection quantity corresponding to the target engine according to the air-fuel ratio and a preset required torque.
3. The method of claim 2, wherein said detecting whether the target engine satisfies a preset fault detection condition based on the operating parameter comprises:
detecting whether the target engine runs or not according to the starting state; and/or the presence of a gas in the gas,
detecting whether the target engine is in a steady-state working condition or not according to the opening degree of the accelerator; and/or the presence of a gas in the gas,
detecting whether the air inlet system of the target engine has an electrical fault according to the electrical fault state of the air inlet system of the target engine to obtain a detection result;
and determining whether the target engine meets a preset fault detection condition or not according to the detection result.
4. The method of claim 3, wherein said determining whether the target engine satisfies a preset fault detection condition based on the detection result comprises:
and if the target engine is in a running state, and/or the target engine is in a steady-state working condition, and/or the target engine has no electrical fault, determining that the target engine meets a preset fault detection condition.
5. The method of any of claims 1-4, wherein said calculating a deviation index corresponding to said target engine based on said first and second injected fuel amounts comprises:
determining a difference between the first and second injected amounts of gas;
and calculating an integral accumulated value of the ratio of the difference value to the first fuel gas injection quantity in a preset time interval to obtain the deviation index.
6. The method of any of claims 1-4, wherein said determining whether an intake system of the target engine is malfunctioning based on the deviation index comprises:
and if the deviation index is not larger than a preset threshold value, judging that the air intake system of the target engine breaks down.
7. The method of any of claims 1-4, wherein after determining whether the intake system of the target engine is malfunctioning based on the deviation index, further comprising:
and if the air inlet system of the target engine fails, controlling the target engine to perform fault reminding operation, or sending fault reminding information to terminal equipment of operation and maintenance personnel.
8. An engine failure detection apparatus, comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring operation parameters generated in the operation process of a target engine, and the operation parameters comprise an actual air quantity and an air-fuel ratio;
the first calculation module is used for calculating a first fuel gas injection amount corresponding to the target engine according to the operation parameters and calculating a second fuel gas injection amount corresponding to the target engine according to the air-fuel ratio and a preset required torque;
the second calculation module is used for calculating a deviation index corresponding to the target engine according to the first fuel gas injection quantity and the second fuel gas injection quantity;
a determination module to determine whether an intake system of the target engine is malfunctioning based on the deviation index.
9. The apparatus of claim 8, wherein the operating parameters further include a throttle opening, a start state, and an electrical fault state of an air intake system of the target engine;
the first computing module includes:
the detection unit is used for detecting whether the target engine meets a preset fault detection condition or not according to the operation parameters;
and the first calculation unit is used for calculating a first fuel gas injection amount corresponding to the target engine according to the operation parameters and calculating a second fuel gas injection amount corresponding to the target engine according to the air-fuel ratio and a preset required torque if the target engine meets a preset fault detection condition.
10. The apparatus of claim 9, wherein the detection unit is configured to:
detecting whether the target engine runs or not according to the starting state; and/or the presence of a gas in the gas,
detecting whether the target engine is in a steady-state working condition or not according to the opening degree of the accelerator; and/or the presence of a gas in the gas,
detecting whether the air inlet system of the target engine has an electrical fault according to the electrical fault state of the air inlet system of the target engine to obtain a detection result;
and determining whether the target engine meets a preset fault detection condition or not according to the detection result.
11. The apparatus of claim 10, wherein the determining whether the target engine satisfies a preset fault detection condition according to the detection result comprises:
and if the target engine is in a running state, and/or the target engine is in a steady-state working condition, and/or the target engine has no electrical fault, determining that the target engine meets a preset fault detection condition.
12. The apparatus of any of claims 8-11, wherein the second computing module comprises:
a determination unit for determining a difference between the first gas injection amount and the second gas injection amount;
and the second calculating unit is used for calculating an integral accumulated value of the ratio of the difference value to the first fuel gas injection amount in a preset time interval to obtain the deviation index.
13. The apparatus of any one of claims 8-11, wherein the determining module is configured to:
and if the deviation index is not larger than a preset threshold value, judging that the air intake system of the target engine breaks down.
14. The apparatus according to any one of claims 8-11, further comprising:
and the control module is used for controlling the target engine to perform fault reminding operation or sending fault reminding information to terminal equipment of operation and maintenance personnel if the air inlet system of the target engine fails.
15. An engine failure detection apparatus, characterized by comprising: a memory, a processor;
a memory; a memory for storing the processor-executable instructions;
wherein the processor is configured to invoke program instructions in the memory to perform the engine fault detection method of any of claims 1-7.
16. A computer-readable storage medium having computer-executable instructions stored thereon for performing the engine fault detection method of any one of claims 1-7 when executed by a processor.
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| CN113586239B (en) * | 2021-08-27 | 2022-09-16 | 一汽解放汽车有限公司 | Engine fault diagnosis method, engine fault diagnosis device, controller and storage medium |
| CN114038083B (en) * | 2021-10-29 | 2023-05-05 | 东风商用车有限公司 | Intelligent maintenance reminding system for vehicle air inlet equipment |
| CN114810370B (en) * | 2021-12-30 | 2023-08-18 | 潍柴动力股份有限公司 | Overload protection method, device and equipment for multi-fuel engine |
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