CN116220903A - Engine fire fault diagnosis method, device, server side and storage medium - Google Patents
Engine fire fault diagnosis method, device, server side and storage medium Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
- F02B77/085—Safety, indicating, or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
- F02B77/086—Sensor arrangements in the exhaust, e.g. for temperature, misfire, air/fuel ratio, oxygen sensors
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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
- F02D45/00—Electrical control not provided for in groups F02D41/00 - F02D43/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The application discloses a method and a device for diagnosing engine fire faults, a server side and a storage medium. The utility model provides a have with initial rotational speed signal drive generator, initial torque signal drive engine, the angular acceleration of real-time acquisition engine, whether the judgement is on fire through monitoring the angular acceleration of engine, during normal ignition, angular acceleration has specific angular acceleration frequency, angular acceleration frequency produces the change when the condition of on fire appears, thereby produce the signal of on fire, adjust the range extender operating mode through the signal of on fire, under the prerequisite that satisfies the power demand promptly, change current generator rotational speed and engine torque, simultaneously, continue to detect the condition of on fire, if the angular acceleration increases and reaches the threshold value of on fire, about reporting out the fire trouble, if the angular acceleration numerical value no longer increases, the signal of on fire stops sending, the fire trouble mistake that the external condition excitation led to is effectively avoided to this scheme.
Description
Technical Field
The disclosure relates to the technical field of fire fault diagnosis, in particular to a method, a device, a server side and a storage medium for diagnosing fire faults of an engine.
Background
The engine fire fault diagnosis of the range extender is a fire fault diagnosis strategy used in an on-board diagnosis (On Board Diagnostics, OBD) system of an automobile, the engine needs to detect the fire rate in the running process and report the fire fault when reaching a certain fire rate, the existing fire detection technology judges the fire by monitoring the change (continuous running) frequency of the crankshaft acceleration at the corresponding cylinder ignition moment, the crankshaft rotation acceleration has a specific acceleration frequency in normal ignition, the acceleration frequency changes when the fire situation occurs, ECU (Electronic Control Unit) compares the acceleration frequency with a set limit value as a measured value to judge whether the fire fault exists, but at certain common working condition points, the resonance vibration of the range extender, the vibration of a generator, the excitation of an external road surface, the suspension vibration and the like also cause the crankshaft rotation change to generate deviation, so that the deviation exceeds the set limit value to misreport the fire, and the fire fault diagnosis is misjudged.
Disclosure of Invention
In view of the foregoing drawbacks or shortcomings of the prior art, it is desirable to provide an engine misfire fault diagnosis method and apparatus that effectively avoids false alarms of a misfire fault caused by external condition excitation.
In a first aspect, a method for diagnosing a misfire fault in an engine includes the steps of:
driving a generator by an initial rotation speed signal and driving an engine by an initial torque signal;
acquiring a first angular acceleration of an engine in real time, and generating a fire signal when the first angular acceleration is judged to be greater than or equal to a first preset threshold value;
generating a rotation speed adjusting signal set according to the fire signal;
calculating a torque adjustment signal set based on the rotation speed adjustment signal set and the power generation demand power;
driving the generator to gradually increase in rotation speed by the rotation speed adjusting signal set, and driving the engine to gradually decrease in torque by the torque adjusting signal set;
and judging whether a fire fault signal is generated according to the magnitude relation between the second angular acceleration of the engine and a second preset threshold value.
According to the technical scheme provided by the embodiment of the application, the judging whether the fire fault signal is generated according to the magnitude relation between the second angular acceleration of the engine and the second preset threshold value comprises the following steps:
judging that a fire fault signal is generated if the second angular acceleration is greater than or equal to a second preset threshold value; if the second angular acceleration is smaller than a second preset threshold value, judging that a fire fault signal is not generated; and stopping transmitting the misfire signal after judging that the misfire fault is not generated.
According to the technical scheme provided by the embodiment of the application, after stopping sending the fire signal, the method further comprises the following steps: the generator continues to be driven with an initial rotational speed signal and the engine is driven with an initial torque signal.
According to the technical scheme provided by the embodiment of the application, the generating the rotation speed adjusting signal set according to the misfire signal includes:
acquiring a real-time rotating speed value according to the fire signal;
based on the real-time rotation speed value, a rotation speed adjusting signal set is constructed, wherein the rotation speed adjusting signal set comprises N gradually increasing adjusting rotation speed values, the adjusting rotation speed values are real-time rotation speed values+n, the first preset adjusting values are equal to or less than 0 and equal to N and less than or equal to N.
According to the technical scheme provided by the embodiment of the application, based on the rotation speed adjusting signal set and the power generation demand power, the torque adjusting signal set is obtained through calculation, and the method comprises the following steps:
judging that the power generation demand power is unchanged, traversing a rotating speed adjusting signal set, and calculating torque corresponding to the rotating speed one by one to obtain a torque adjusting signal set;
the set of torque adjustment signals includes a plurality of progressively decreasing adjustment torque values.
According to the technical scheme provided by the embodiment of the application, the method for driving the generator to gradually increase in rotation speed by the rotation speed adjusting signal set and gradually decrease in engine torque by the torque adjusting signal set comprises the following steps:
sequentially driving a generator according to the regulating rotating speed value in the rotating speed regulating signal set, wherein the rotating speed of the generator is gradually increased;
and sequentially driving the engines according to the regulating torque values in the torque regulating signal set, wherein the rotating speeds of the engines are gradually reduced.
According to the technical scheme provided by the embodiment of the application, the first angular acceleration of the engine is obtained in real time, and when the first angular acceleration is judged to be smaller than the first preset threshold value, the generator is driven by the initial rotating speed signal continuously, and the engine is driven by the initial torque signal.
In a second aspect, an engine misfire fault diagnosis apparatus based on the above, includes:
the system comprises a misfire signal generation module, a first torque signal generation module and a first control module, wherein the misfire signal generation module is used for driving a generator with an initial rotating speed signal, driving an engine with an initial torque signal, acquiring a first angular acceleration of the engine in real time, and generating a misfire signal when judging that the first angular acceleration is larger than a first preset threshold value;
the rotating speed adjusting signal set generating module is used for generating a rotating speed adjusting signal set according to the fire signal;
the torque adjusting signal set calculating module is used for calculating a torque adjusting signal set based on the rotating speed adjusting signal set and the power generation demand power;
the driving module is used for driving the rotation speed of the generator to increase according to the rotation speed adjusting signal set and driving the torque of the engine to decrease according to the torque adjusting signal set;
and the fire fault signal generation module is used for judging whether to generate a fire fault signal according to the magnitude relation between the second angular acceleration of the engine and a second preset threshold value.
In a third aspect, a server includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of an engine misfire fault diagnostic method described above when executing the computer program.
In a fourth aspect, a computer readable storage medium having a computer program, wherein the computer program when executed by a processor implements the steps of an engine misfire fault diagnostic method described above.
The technical scheme specifically discloses a method for diagnosing the fire fault of an engine, which is characterized in that an initial rotating speed signal is used for driving a generator, an initial torque signal is used for driving the engine, a first angular acceleration of the engine is obtained in real time, and a fire signal is generated when the first angular acceleration is judged to be greater than or equal to a first preset threshold value; the generated fire signal does not necessarily indicate that the fire fault is generated, and the deviation is generated by the rotation change of the crankshaft caused by resonance shake of a range extender, shake of a generator, excitation of an external road surface, suspension vibration and the like, so that the fire is wrongly reported by exceeding a first preset threshold value, so that a rotation speed adjusting signal set is generated according to the received fire signal; then obtaining power generation demand power, and calculating to obtain a torque adjustment signal set based on the rotation speed adjustment signal set when the power generation demand power is unchanged; driving a generator to increase in rotation speed by the rotation speed adjusting signal set, and driving an engine to decrease in torque by the torque adjusting signal set so as to change the current operation condition of the engine; meanwhile, the engine fire is continuously detected, the second angular acceleration of the engine is obtained in real time, and a fire fault signal is generated until the second angular acceleration is judged to be more than or equal to a second preset threshold value, so that the occurrence of the fire fault of the engine is diagnosed; according to the scheme, whether the engine is in fire or not is judged by continuously monitoring the angular acceleration of the engine, the angular acceleration has specific angular acceleration frequency during normal ignition, the angular acceleration frequency changes when the condition of the fire occurs, so that a fire signal is generated, the working condition of the range extender is adjusted through the fire signal, namely, the current rotation speed and the torque of the engine are changed on the premise of meeting the power demand, meanwhile, the condition of the fire is continuously detected, if the value of the angular acceleration is increased to reach the fire threshold value, a fire failure is reported, if the value of the angular acceleration is not increased any more, the fire signal stops being sent, and the scheme can effectively avoid the false alarm of the fire failure caused by the excitation of external conditions.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings, in which:
FIG. 1 is a flow chart of a method for diagnosing engine misfire faults.
FIG. 2 is a schematic flow diagram of a first detailed method for diagnosing engine misfire.
FIG. 3 is a schematic flow chart of a second detail of an engine misfire fault diagnostic method.
FIG. 4 is a flowchart illustrating a third detail of an engine misfire fault diagnosis method.
FIG. 5 is a flowchart illustrating a fourth detail of an engine misfire fault diagnostic method.
FIG. 6 is a schematic diagram of an engine misfire fault diagnostic apparatus.
Fig. 7 is a schematic block diagram of a server.
Reference numerals in the drawings: 101. a misfire signal generation module; 102. a rotation speed adjusting signal set generating module; 103. a torque adjustment signal set calculation module; 104. a driving module; 105. a misfire fault signal generation module; 501. a CPU; 502. a ROM; 503. a RAM; 504. a bus; 505. an I/O interface; 506. an input section; 507. an output section; 508. a storage section; 509. a communication section; 510. a driver; 511. removable media.
Detailed Description
The present application is described in further detail below with reference to the 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 noted that, for convenience of description, only the portions related to the invention are shown in the drawings.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example 1
Referring to fig. 1, the method for diagnosing the engine misfire fault provided by the application includes the following steps:
s110, driving a generator by an initial rotating speed signal, and driving an engine by an initial torque signal;
s120, acquiring a first angular acceleration of the engine in real time, and generating a fire signal when the first angular acceleration is judged to be greater than or equal to a first preset threshold value;
s130, generating a rotating speed adjusting signal set according to the fire signal;
s140, calculating a torque adjusting signal set based on the rotating speed adjusting signal set and the power generation required power;
s150, driving the generator to gradually increase in rotation speed by using the rotation speed adjusting signal set, and driving the engine to gradually decrease in torque by using the torque adjusting signal set;
and S160, judging whether a misfire fault signal is generated according to the magnitude relation between the second angular acceleration of the engine and a second preset threshold value.
In the embodiment, S110, the generator is driven by an initial rotation speed signal, and the engine is driven by an initial torque signal;
further, the initial rotational speed signal is a signal of an initial set rotational speed, and the initial set rotational speed is n 0 ，n 0 =1000r/min, which is the rotational speed at which the generator is driven to operate steadily;
s120, acquiring a first angular acceleration of the engine in real time, and generating a fire signal when the first angular acceleration is judged to be greater than or equal to a first preset threshold value;
further, the initial torque signal is a signal of an initial set torque, and the initial set torque is T 0 ，T 0 =95.5n·m, which is the initial set rotational speed N 0 The corresponding torque;
s130, generating a rotating speed adjusting signal set according to the fire signal;
further, the set of rotational speed adjustment signals includes a plurality of rotational speed adjustment signals;
s140, calculating a torque adjusting signal set based on the rotating speed adjusting signal set and the power generation required power;
further, based on the rotation speed of the generator and the power required by the power generation, the torque of the engine is calculated as follows:
wherein: t represents the target torque of the engine, and the unit is N.m;
n represents the rotation speed of the generator, and the unit is the rotation speed per minute (r/min);
k is a constant, k=9550;
further, the power generation required power is generally set to 10kW according to the requirements of the extended range electric vehicle;
s150, driving the generator to gradually increase in rotation speed by using the rotation speed adjusting signal set, and driving the engine to gradually decrease in torque by using the torque adjusting signal set;
further, as can be seen from the torque calculation formula of the engine, the rotation speed of the generator is inversely proportional to the torque of the engine;
s160, judging whether a misfire fault signal is generated according to the magnitude relation between the second angular acceleration of the engine and a second preset threshold value;
further, the second preset threshold is greater than the first preset threshold.
As shown in fig. 1, S160, determining whether to generate the misfire fault signal according to the magnitude relation between the second angular acceleration of the engine and the second preset threshold value includes:
first engine misfire diagnostic condition: s161, judging that a fire fault signal is generated if the second angular acceleration is greater than or equal to a second preset threshold value;
second engine misfire diagnostic condition: s162, judging that the fire fault signal is not generated if the second angular acceleration is smaller than a second preset threshold value; and stopping transmitting the misfire signal after judging that the misfire fault is not generated.
As shown in fig. 1, S170 further includes, after stopping transmitting the misfire signal: continuously driving the generator by an initial rotating speed signal, and driving the engine by an initial torque signal;
specifically, after S161 is performed, the generator is continuously driven with the initial rotational speed signal, the engine is driven with the initial torque signal, and the engine misfire fault diagnosis method is re-performed in S110.
As shown in fig. 2, S130, generating a rotation speed adjustment signal set according to the misfire signal includes:
s131, acquiring a real-time rotating speed value according to the fire signal;
s132, constructing a rotation speed adjusting signal set based on the real-time rotation speed value;
the rotating speed adjusting signal set comprises N gradually increasing adjusting rotating speed values, wherein the adjusting rotating speed values are real-time rotating speed values plus N, the first preset adjusting values are equal to or less than 0 and equal to or less than N;
the regulating rotation speed value of the rotation speed regulating signal set is shown in the table one;
table one: rotational speed
| n 0 | n 1 | n 2 | n 3 | ||
| Rotational speed value | 1000 | 1200 | 1400 | 1600 | …… |
The generated N gradually-increasing regulating rotating speed values are sequentially N 1 、n 2 、n 3 、…；
Further, the real-time rotational speed value is greater than the rotational speed value of the initial rotational speed signal, and n 0 <n 1 <n 2 <n 3 <…; at this time, the rotational speed adjustment signal adjusts the generator to operate at a rotational speed value greater than the initial rotational speed signal.
As shown in fig. 3, S140, calculating a torque adjustment signal set based on the rotation speed adjustment signal set and the power generation demand includes:
s141, traversing the rotating speed adjusting signal set, and calculating torque corresponding to the rotating speed one by one to obtain a torque adjusting signal set;
the torque adjustment signal set includes a plurality of progressively decreasing adjustment torque values;
the adjustment torque values of the torque adjustment signal sets are shown in table two;
and (II) table: torque moment
| T 0 | T 1 | T 2 | T 3 | ||
| Torque value | 95.5 | 79.6 | 68.2 | 59.7 | …… |
The generated multiple gradually decreasing regulating torque values are n in turn 1 、n 2 、n 3 、…；
Further, the torque adjustment signal set has an adjustment torque value less than the torque of the initial torque signal, and T 0 >T 1 >T 2 >T 3 >…; at this time, the torque adjustment signal adjusts the engine to operate at a torque less than the initial torque signal.
As shown in fig. 4, S150, driving the generator with the set of rotational speed adjustment signals to gradually increase the rotational speed, and driving the engine with the set of torque adjustment signals to gradually decrease the torque, includes:
s151, sequentially driving a generator according to the regulation rotation speed value in the rotation speed regulation signal set, wherein the rotation speed of the generator is gradually increased;
s152, sequentially driving the engine according to the regulating torque value in the torque regulating signal set, and gradually reducing the rotating speed of the engine;
further, the rotation speed of the generator is inversely proportional to the rotation speed of the engine, and the rotation speed of the engine is gradually reduced while the rotation speed of the generator is gradually increased, and the rotation speed of the generator and the rotation speed of the engine are synchronously carried out.
As shown in fig. 5, after driving the generator with the initial rotation speed signal and the initial torque signal, entering S121, obtaining a first angular acceleration of the engine in real time, and when judging that the first angular acceleration is smaller than a first preset threshold value, continuing to drive the generator with the initial rotation speed signal and driving the engine with the initial torque signal;
further, if the first angular acceleration is smaller than the first preset threshold, the cycle is started, the method returns to S110, then it is determined whether the first angular acceleration is smaller than the first preset threshold, if the first angular acceleration is smaller than the first preset threshold, the method continues to S110, until the first angular acceleration is larger than or equal to the first preset threshold, the cycle is jumped out, and the method proceeds to S130.
Example two
Referring to fig. 6, an engine misfire fault diagnosis apparatus according to a first embodiment of the present application includes:
the misfire signal generating module 101 is configured to drive the generator with an initial rotational speed signal, drive the engine with an initial torque signal, acquire a first angular acceleration of the engine in real time, and generate a misfire signal when the first angular acceleration is determined to be greater than a first preset threshold value;
a rotation speed adjustment signal set generation module 102 for generating a rotation speed adjustment signal set according to the misfire signal;
the torque adjustment signal set calculation module 103 is configured to obtain a power generation demand power, and calculate a torque adjustment signal set based on the rotation speed adjustment signal set;
a drive module 104 for driving the generator to increase in rotational speed with the set of rotational speed adjustment signals and driving the engine to decrease in torque with the set of torque adjustment signals;
the misfire fault signal generation module 105 is configured to acquire a second angular acceleration of the engine in real time, and generate a misfire fault signal when the second angular acceleration is determined to be greater than or equal to a second preset threshold value.
As shown in fig. 6, the misfire fault signal generation module 105 is further configured to acquire a second angular acceleration of the engine in real time, and not generate the misfire fault signal when the second angular acceleration is determined to be less than a second preset threshold value; and stopping transmitting the misfire signal after judging that the misfire fault is not generated.
As shown in fig. 6, after stopping the transmission of the misfire signal, the misfire signal generation module 101 continues to drive the generator with the initial rotational speed signal, which drives the engine.
Further, a power supply module configured to supply power to the misfire signal generation module 101, the rotation speed adjustment signal set generation module 102, the torque adjustment signal set calculation module 103, the driving module 104, and the misfire fault signal generation module 105 is also included.
Example III
A server includes a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the steps of an engine misfire fault diagnostic method as in the first embodiment when executing the computer program.
In the present embodiment, as shown in fig. 7, the computer system includes a Central Processing Unit (CPU) 501, which can perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM) 502 or a program loaded from a storage section into a Random Access Memory (RAM) 503. In the RAM503, various programs and data required for the system operation are also stored. The CPU 501, ROM 502, and RAM503 are connected to each other through a bus 504. An input/output (I/O) interface 505 is also connected to bus 504.
The following components are connected to the I/O interface 505: an input section 506 including a keyboard, a mouse, and the like; an output section including a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), etc., and a speaker, etc.; a storage portion 508 including a hard disk and the like; and a communication section 509 including a network interface card such as a LAN card, a modem, or the like. The communication section 509 performs communication processing via a network such as the internet. The drives are also connected to the I/O interface 505 as needed. A removable medium 511 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 510 as needed so that a computer program read therefrom is mounted into the storage section 508 as needed.
In particular, the process described above with reference to flowchart 1 may be implemented as a computer software program according to an embodiment of the invention. For example, embodiments of the present invention include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method shown in the flow chart. In such embodiments, the computer program may be downloaded and installed from a network via a communication portion, and/or installed from a removable medium. The above-described functions defined in the system of the present application are performed when the computer program is executed by a Central Processing Unit (CPU) 501.
The computer readable medium shown in the present invention may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present invention, however, the computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with the computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, RF, etc., or any suitable combination of the foregoing.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units involved in the embodiments of the present invention may be implemented by software, or may be implemented by hardware, and the described units may also be provided in a processor. Wherein the names of the units do not constitute a limitation of the units themselves in some cases. The described units or modules may also be provided in a processor, for example, as: the processor comprises a first generation module, an acquisition module, a search module, a second generation module and a combination module. The names of these units or modules do not in any way limit the units or modules themselves, and the acquisition module may also be described as "an acquisition module for acquiring a plurality of instances to be probed in the base table", for example.
As another aspect, the present application also provides a computer-readable medium that may be contained in the electronic device described in the above embodiment; or may exist alone without being incorporated into the electronic device. The computer readable medium carries one or more programs which, when executed by one of the electronic devices, cause the electronic device to implement an engine misfire fault diagnosis method as in the above embodiment.
The units involved in the embodiments of the present invention may be implemented by software, or may be implemented by hardware, and the described units may also be provided in a processor. Wherein the names of the units do not constitute a limitation of the units themselves in some cases. The described units or modules may also be provided in a processor, for example, as: the processor comprises a first generation module, an acquisition module, a search module, a second generation module and a combination module. The names of these units or modules do not in any way limit the units or modules themselves, and the acquisition module may also be described as "an acquisition module for acquiring a plurality of instances to be probed in the base table", for example.
As another aspect, the present application also provides a computer-readable medium that may be contained in the electronic device described in the above embodiment; or may exist alone without being incorporated into the electronic device. The computer readable medium carries one or more programs which, when executed by one of the electronic devices, cause the electronic device to implement an engine misfire fault diagnosis method as in the above embodiment.
The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the invention referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the invention. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.
Claims (10)
1. An engine misfire fault diagnosis method is characterized by comprising the following steps:
driving a generator by an initial rotation speed signal and driving an engine by an initial torque signal;
acquiring a first angular acceleration of an engine in real time, and generating a fire signal when the first angular acceleration is judged to be greater than or equal to a first preset threshold value;
generating a rotation speed adjusting signal set according to the fire signal;
calculating a torque adjustment signal set based on the rotation speed adjustment signal set and the power generation demand power;
driving the generator to gradually increase in rotation speed by the rotation speed adjusting signal set, and driving the engine to gradually decrease in torque by the torque adjusting signal set;
and judging whether a fire fault signal is generated according to the magnitude relation between the second angular acceleration of the engine and a second preset threshold value.
2. The method according to claim 1, wherein determining whether to generate the misfire fault signal based on a magnitude relation between a second angular acceleration of the engine and a second preset threshold value comprises:
judging that a fire fault signal is generated if the second angular acceleration is greater than or equal to a second preset threshold value; if the second angular acceleration is smaller than a second preset threshold value, judging that a fire fault signal is not generated; and stopping transmitting the misfire signal after judging that the misfire fault is not generated.
3. The engine misfire fault diagnosis method as recited in claim 2, further comprising, after the ceasing to transmit the misfire signal: the generator continues to be driven with an initial rotational speed signal and the engine is driven with an initial torque signal.
4. A method of diagnosing an engine misfire fault as recited in any one of claims 1-3 wherein generating a set of rotational speed adjustment signals based on the misfire signal includes:
acquiring a real-time rotating speed value according to the fire signal;
based on the real-time rotation speed value, a rotation speed adjusting signal set is constructed, wherein the rotation speed adjusting signal set comprises N gradually increasing adjusting rotation speed values, the adjusting rotation speed values are real-time rotation speed values+n, the first preset adjusting values are equal to or less than 0 and equal to N and less than or equal to N.
5. The method for diagnosing an engine misfire fault as recited in claim 4 wherein said calculating a set of torque adjustment signals based on said set of rotational speed adjustment signals and said generated demand power comprises:
judging that the power generation demand power is unchanged, traversing a rotating speed adjusting signal set, and calculating torque corresponding to the rotating speed one by one to obtain a torque adjusting signal set;
the set of torque adjustment signals includes a plurality of progressively decreasing adjustment torque values.
6. The method of diagnosing an engine misfire fault as recited in claim 5 wherein said driving a generator at said set of rotational speed adjustment signals at progressively higher rotational speeds and driving an engine at said set of torque adjustment signals at progressively lower engine torque comprises:
sequentially driving a generator according to the regulating rotating speed value in the rotating speed regulating signal set, wherein the rotating speed of the generator is gradually increased;
and sequentially driving the engines according to the regulating torque values in the torque regulating signal set, wherein the rotating speeds of the engines are gradually reduced.
7. A method of diagnosing an engine misfire fault as recited in any one of claims 1-3 further comprising the steps of:
and acquiring the first angular acceleration of the engine in real time, and continuously driving the generator by using an initial rotating speed signal and driving the engine by using an initial torque signal when the first angular acceleration is judged to be smaller than a first preset threshold value.
8. An engine misfire fault diagnostic apparatus, comprising:
the system comprises a misfire signal generation module, a first torque signal generation module and a first control module, wherein the misfire signal generation module is used for driving a generator with an initial rotating speed signal, driving an engine with an initial torque signal, acquiring a first angular acceleration of the engine in real time, and generating a misfire signal when judging that the first angular acceleration is larger than a first preset threshold value;
the rotating speed adjusting signal set generating module is used for generating a rotating speed adjusting signal set according to the fire signal;
the torque adjusting signal set calculating module is used for calculating a torque adjusting signal set based on the rotating speed adjusting signal set and the power generation demand power;
the driving module is used for driving the rotation speed of the generator to increase according to the rotation speed adjusting signal set and driving the torque of the engine to decrease according to the torque adjusting signal set;
and the fire fault signal generation module is used for judging whether to generate a fire fault signal according to the magnitude relation between the second angular acceleration of the engine and a second preset threshold value.
9. A server comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of an engine misfire fault diagnosis method according to any of claims 1 to 7.
10. A computer readable storage medium having a computer program, characterized in that the computer program when executed by a processor implements the steps of an engine misfire fault diagnosis method as recited in any one of claims 1 to 7.
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| CN117307317A (en) * | 2023-11-29 | 2023-12-29 | 南通诺信汽车零部件有限公司 | Misfire diagnosis method, device, medium and computing equipment for automobile engine |
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