CN113311363B - Method, device, equipment and medium for diagnosing open-circuit fault of secondary coil of engine - Google Patents
Method, device, equipment and medium for diagnosing open-circuit fault of secondary coil of engine Download PDFInfo
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- CN113311363B CN113311363B CN202110432314.9A CN202110432314A CN113311363B CN 113311363 B CN113311363 B CN 113311363B CN 202110432314 A CN202110432314 A CN 202110432314A CN 113311363 B CN113311363 B CN 113311363B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
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Abstract
The invention discloses a method, a device, equipment and a medium for diagnosing an open-circuit fault of a secondary coil of an engine, wherein the method comprises the following steps: acquiring voltage at a pin of a primary coil of the engine; when the voltage is greater than or equal to a preset voltage threshold value, the voltage is high voltage, and the total duration of the high voltage occurring in one ignition cycle is counted; and when the total time length is greater than or equal to a preset time length threshold value, determining that the secondary coil of the engine is in an open-circuit fault. According to the diagnosis method for the open-circuit fault of the secondary coil of the engine, whether the open-circuit fault occurs in the secondary coil can be judged only according to the voltage at the pin of the primary coil, if the open-circuit occurs in the secondary coil, the torque output of the engine is limited in time, and the functions of protecting the engine and improving the driving safety are achieved.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a method, a device, equipment and a medium for diagnosing an open-circuit fault of a secondary coil of an engine.
Background
The modern automobile engine ignition system collects sensor signals of different parts arranged on an engine and a vehicle through an Electronic Control Unit (ECU), and selects proper ignition energy to ignite the engine at the optimal time according to the running working condition of the engine. The ignition working principle is as follows: a micro control unit in the ECU outputs a control signal to turn on a driving level switch, so that the battery charges an ignition coil, and after the charging is finished, the driving level switch is turned off to realize the ignition. The ignition mode comprises two modes: the ignition system comprises an external drive ignition and an internal drive ignition, wherein a drive stage switch of the external drive ignition is integrated in an ignition coil, a drive stage switch of the internal drive ignition is integrated in an ECU, and with the continuous increase of ignition energy requirements, the internal drive ignition mode is more and more widely applied based on the consideration of temperature and energy distribution.
With the application of numerous electronic and electrical components, numerous wires, power lines, special high voltage, ground wires and the grounding of a vehicle body are arranged in the vehicle, so that short circuit and open circuit become common faults, the ignition circuit is easy to overcurrent due to the faults of an ignition coil, the faults of the wires or other factors, and when the ignition circuit is overcurrent, the ignition function is possibly disabled due to the fact that a drive level switch of internal drive ignition is damaged, so that the whole ECU is scrapped, and the driving safety is influenced. Therefore, it is particularly important to diagnose ignition failure of the engine in time.
However, in the engine fault diagnosis in the prior art, the open-circuit fault detection function of the secondary coil is not started, so that the state of the secondary coil circuit cannot be detected in time, and therefore the circuit state of the secondary coil and whether the coil ignition is normal cannot be comprehensively and accurately reflected.
Disclosure of Invention
The embodiment of the disclosure provides a method, a device, equipment and a medium for diagnosing an open-circuit fault of a secondary coil of an engine. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
In a first aspect, an embodiment of the present disclosure provides a method for diagnosing an open-circuit fault of a secondary coil of an engine, including:
acquiring voltage at a pin of a primary coil of the engine;
when the voltage is greater than or equal to a preset voltage threshold value, the voltage is high, and the total duration of the high voltage in one ignition cycle is counted;
and when the total time length is greater than or equal to a preset time length threshold value, determining that the secondary coil of the engine is in an open-circuit fault.
In an optional embodiment, before obtaining the voltage at the pin of the primary coil of the motor, the method further comprises:
judging whether the system voltage is greater than or equal to a preset fault detection threshold value or not;
if the system voltage is greater than or equal to the fault detection threshold, judging whether the engine is in a dynamic fuel cut-off state;
if the engine is not in the dynamic fuel cut state, the engine is determined to meet the enabling condition of fault detection.
In an optional embodiment, further comprising:
if the system voltage is less than the fault detection threshold, or the engine is in a dynamic fuel cut-off state, it is determined that the engine does not meet the enable condition for fault detection.
In an optional embodiment, the high voltage is obtained when the voltage is greater than or equal to the preset voltage threshold, and the total duration of occurrence of the high voltage in one ignition cycle is counted, including:
after entering detection, starting timing by a fault detection timer;
when the voltage is greater than or equal to the preset voltage threshold, the high level detection timer starts to time, and when the voltage is less than the preset voltage threshold, the high level detection timer stops timing;
if the time in the current fault detection timer does not reach an ignition period, the detection is continued, and if the time reaches an ignition period, the total time length of the high voltage recorded in the ignition period by the high level detection timer is counted.
In an alternative embodiment, it is determined that the engine secondary is free of an open circuit fault when the total duration is less than a preset duration threshold.
In an optional embodiment, after determining that the engine secondary coil open circuit fault occurs, the method further comprises:
the failure information is sent to an electronic control unit of the vehicle, and the engine torque output is limited.
In a second aspect, an embodiment of the present disclosure provides a device for diagnosing an open-circuit fault of a secondary coil of an engine, including:
the voltage detection module is used for acquiring the voltage at a pin of a primary coil of the engine;
the timing module is used for counting the total time length of the high voltage in an ignition period when the voltage is higher than or equal to a preset voltage threshold value and is a high voltage;
and the diagnosis module is used for determining the open-circuit fault of the secondary coil of the engine when the total time length is greater than or equal to a preset time length threshold value.
In an optional embodiment, further comprising:
the enabling detection module is used for judging whether the system voltage is greater than or equal to a preset fault detection threshold value;
if the system voltage is greater than or equal to the fault detection threshold, judging whether the engine is in a dynamic fuel cut-off state;
if the engine is not in the dynamic fuel cut state, the engine is determined to meet the enabling condition of fault detection.
In a third aspect, the disclosed embodiment provides a diagnostic device for an open-circuit fault of a secondary coil of an engine, which includes a processor and a memory storing program instructions, wherein the processor is configured to execute the diagnostic method for the open-circuit fault of the secondary coil of the engine provided by the above embodiment when executing the program instructions.
In a fourth aspect, the disclosed embodiments provide a computer readable medium, on which computer readable instructions are stored, where the computer readable instructions are executable by a processor to implement a method for diagnosing an open-circuit fault of a secondary coil of an engine provided in the foregoing embodiments.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the embodiment of the disclosure provides a method for diagnosing an open-circuit fault of a secondary coil of an engine, which determines whether the open-circuit fault occurs in the secondary coil by measuring voltages at two pins of a primary coil and counting the total time length of high level occurrence and the fault limit value in an ignition period. When open-circuit fault occurs, the fault information is timely sent to the ECU, and the torque output of the engine is timely limited, so that the engine is protected, and the driving safety is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic flow diagram illustrating a method for diagnosing an open circuit fault in a secondary coil of an engine in accordance with an exemplary embodiment;
FIG. 2 is a schematic flow diagram illustrating a method for diagnosing an open circuit fault in a secondary coil of an engine in accordance with an exemplary embodiment;
FIG. 3 is a schematic diagram of an ignition system according to an exemplary embodiment;
FIG. 4 is a schematic circuit diagram of an ignition coil according to an exemplary embodiment;
FIG. 5 is a schematic diagram illustrating a configuration of an engine secondary open-circuit fault diagnostic apparatus according to an exemplary embodiment;
FIG. 6 is a schematic diagram showing the construction of an engine secondary open-circuit fault diagnostic apparatus according to an exemplary embodiment;
FIG. 7 is a schematic diagram illustrating a computer storage medium in accordance with an exemplary embodiment.
Reference numerals:
01. the ignition control system comprises a storage battery 02, a fuse 03, an ignition switch 04, a secondary coil 05, a distributor 06, a high-voltage wire 07, a spark plug 08, a primary coil 09, an ignition control module 10 and an ECU.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of systems and methods consistent with certain aspects of the invention, as detailed in the appended claims.
In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
In the engine fault diagnosis in the prior art, the secondary coil open-circuit fault detection function is not started, so that the state of a secondary coil circuit cannot be detected, and the circuit state of the secondary coil and whether the ignition of the coil is normal cannot be comprehensively and accurately reflected. The embodiment of the disclosure determines whether the open-circuit fault occurs in the secondary coil by measuring the voltages at the two pins of the primary coil and counting the total time length of occurrence of the high level and the magnitude of the fault limit value in one ignition period.
The method for diagnosing the open-circuit fault of the secondary coil of the engine provided by the embodiment of the application will be described in detail below with reference to fig. 1 to 4. Fig. 1 is a flow diagram illustrating a method for diagnosing an open-circuit fault in a secondary coil of an engine, according to an exemplary embodiment, and specifically includes the following steps, referring to fig. 1.
S101 acquires a voltage at a pin of a primary coil of the motor.
In a possible implementation manner, before executing step S101, determining whether the engine satisfies an enabling condition of fault detection at this time is further included.
Specifically, after the engine is powered on and normally started, the detection of the fault enabling condition is started, firstly, the system voltage is judged, whether the system voltage is greater than or equal to a preset fault detection threshold value is judged, if the system voltage is greater than or equal to the fault detection threshold value, whether the engine is in a dynamic fuel cut-off state is continuously judged, and if the engine is not in the dynamic fuel cut-off state, the engine is determined to meet the enabling condition of the fault detection. That is, when the engine simultaneously satisfies the above two conditions, it is possible to start detecting whether the engine has an open-circuit fault of the secondary coil 04.
In an optional embodiment, further comprising: and if the system voltage is smaller than the fault detection threshold value or the engine is in a dynamic fuel cut-off state, determining that the engine does not meet the enabling condition of fault detection, and performing fault detection on the engine. The failure detection threshold may be set by a person skilled in the art according to an actual situation, and the embodiment of the present disclosure is not limited specifically.
Further, if the engine satisfies the enabling condition of the fault detection, the fault detection of the engine is started, and whether the open-circuit fault occurs in the secondary coil 04 can be detected according to the voltage at the two pins of the primary coil 08.
Fig. 3 is a schematic structural diagram of an ignition system according to an exemplary embodiment, as shown in fig. 3, when the engine is working normally, the ECU10 in fig. 3 receives signals of various sensors on the engine, calculates the ignition advance angle and the closing time of the ignition switch 03 under the working condition according to the internal data program of the memory, and sends a command to the ignition system through the ignition control module 09 to control the on-off of the ignition switch 03 according to the command, wherein the ignition control module 09 is integrated in the ECU10 to further control the on-off of the voltage supplied to the ignition primary coil 08 of the storage battery 01.
When the circuit is conducted, current passes through the primary coil 08, and the normal ignition function is realized by periodically controlling the on-off of the ignition switch 03, namely, due to electromagnetic induction, high induced electromotive force is generated in the secondary coil 04, and the ignition is carried out from the high-voltage wire 06 to the spark plug 07.
When the ignition coil of the engine has a secondary open-circuit fault, the voltage in the secondary coil 04 cannot be continuously transmitted backwards, and due to the ignition periodicity, the secondary coil 04 generates a back electromotive force, namely, the voltage is transmitted to the primary coil 08 through electromagnetic induction, and the primary coil 08 generates a high induced electromotive force. Fig. 4 is a schematic circuit diagram of an ignition coil, and as shown in fig. 4, if the secondary coil 04 has an open-circuit fault, the voltage across the two pins B + and B-of the primary coil 08 will increase, and the duration of the high voltage across the two pins at normal ignition and the secondary open-circuit will be different, and the duration at open-circuit will be significantly increased.
From the above analysis, it is possible to determine whether the open-circuit fault has occurred in the secondary winding 04 by detecting the voltage across the two pins B + and B-of the primary winding 08. In one possible implementation, the voltage at the pin B + and B-of the primary winding 08 of the motor may be detected by a voltage detecting instrument or the like to obtain the voltage at the pin B + and B-of the primary winding 08 of the motor.
S102, when the voltage is larger than or equal to the preset voltage threshold value, the voltage is high, and the total duration of the high voltage in one ignition cycle is counted.
In an alternative embodiment, counting the total duration of time that the high voltage occurs within an ignition cycle comprises: after detection is carried out, a fault detection timer starts timing, when the voltage is greater than or equal to a preset voltage threshold value, a high level detection timer starts timing, and when the voltage is less than the preset voltage threshold value, the high level detection timer stops timing; if the time in the current fault detection timer does not reach an ignition period, the detection is continued, and if the time reaches an ignition period, the total time length of the high voltage recorded in the ignition period by the high level detection timer is counted.
Specifically, after the enabling condition of the fault is met, the fault monitoring in one ignition cycle is started, and in order to accurately judge the ignition condition of the ignition coil, the embodiment of the disclosure adds two detection timers in the ECU10, one is a fault detection timer for recording the total time length of the current detection, and the other is a high-level detection timer for detecting the time length of the occurrence of the high voltage at the pin 08 of the primary coil.
After detection is carried out, a fault detection timer and a high-level detection timer are reset, the fault detection timer starts timing, then voltages at two pins 08B + and B-of a primary coil are read, when the voltage is greater than or equal to a preset voltage threshold value, the voltage is high, the high-level detection timer starts timing, when the voltage is smaller than the preset voltage threshold value, the high-level detection timer stops timing, further, whether the time in the current fault detection timer reaches an ignition period or not is compared, if the time in the current fault detection timer does not reach the ignition period, next detection is carried out continuously, and if the time in the current fault detection timer reaches the ignition period, the total time of occurrence of the high voltage recorded in the high-level detection timer is counted.
In an exemplary scenario, the preset voltage threshold is 135V, and if the voltages at the two pins of the primary coil 08B + and B-are greater than or equal to 135V, the voltages at the two pins are determined to be high voltages, and the total duration of the voltage appearance at the two pins of the primary coil 08B + and B-when the voltage at the two pins of the primary coil 08B + and B-is greater than or equal to 135V is counted.
And S103, when the total time length is greater than or equal to the preset time length threshold value, determining that the secondary coil of the engine is in an open-circuit fault.
Further, after obtaining the total time length of occurrence of high voltages at two pins of the primary coil 08 in one ignition cycle, judging whether the total time length of occurrence of the high voltages is greater than or equal to a preset time length threshold value, and when the total time length is greater than or equal to the preset time length threshold value, determining an open-circuit fault of the secondary coil 04 of the engine; and when the total time length is smaller than the preset time length threshold value, determining that the secondary coil 04 of the engine has no open-circuit fault, and resetting the timer to enter the next detection period.
The preset duration threshold may be set by a person skilled in the art according to the fault limit under the current working condition, and the embodiment of the present disclosure is not limited specifically.
According to the step, the circuit state of the secondary coil 04 can be monitored in time, and the circuit state of the secondary coil 04 and whether the coil ignition is normal can be comprehensively and accurately reflected.
In an optional embodiment, after determining that the engine secondary coil 04 has an open-circuit fault, the method further includes: the failure information is sent to the electronic control unit of the vehicle, so that the driver can know the failure information in time, in an exemplary scenario, the ECU10 can broadcast the failure information by voice, for example, send out a voice prompt of "open circuit failure of the secondary of the ignition coil, please maintain in time", and at the same time, the ECU10 limits the torque output of the engine by an instruction. Therefore, the functions of fault diagnosis and engine protection are achieved, and the driving safety is greatly improved.
In order to facilitate understanding of the method for diagnosing the open-circuit fault of the secondary coil of the engine provided by the embodiment of the present application, the following description is made with reference to fig. 2. As shown in fig. 2, the method includes:
when the engine is electrified and normally started, the detection of the fault enabling condition is started, firstly, the system voltage is judged, whether the system voltage is larger than or equal to a preset fault detection threshold value or not is judged, if the system voltage is larger than or equal to the fault detection threshold value, whether the engine is in a dynamic fuel cut-off state or not is continuously judged, and if the engine is not in the dynamic fuel cut-off state, the engine is determined to meet the enabling condition of the fault detection. That is, when the engine simultaneously satisfies the above two conditions, it is only possible to start detecting whether the open-circuit fault of the secondary coil occurs in the engine.
Further, if the engine meets the enabling condition of fault detection, the fault detection timer and the high level detection timer are reset, the fault detection timer starts to time, then the voltages at the two pins B + and B-of the primary coil are read, when the voltage is greater than or equal to the preset voltage threshold value, the high voltage is obtained, the high level detection timer starts to time, and when the voltage is smaller than the preset voltage threshold value, the high level detection timer stops to time. In one exemplary scenario, the preset voltage threshold may be 135V. And further, comparing whether the time in the current fault detection timer reaches an ignition period, if not, continuing to perform the next detection, and if so, counting the total time length of the high voltage recorded in the high-level detection timer.
Further, whether the total time length of the high voltage is greater than or equal to a preset time length threshold value or not is judged, and when the total time length is greater than or equal to the preset time length threshold value, an open-circuit fault of a secondary coil of the engine is determined; and when the total time length is less than a preset time length threshold value, determining that the secondary coil of the engine has no open-circuit fault. The preset duration threshold may be calibrated by a person skilled in the art according to the current working condition, and the embodiment of the present disclosure is not limited specifically.
And finally, when the total duration is greater than or equal to the preset duration threshold, determining the open-circuit fault of the secondary coil of the engine, sending fault information to the electronic control unit, and limiting the torque output of the engine.
According to the diagnosis method for the open-circuit fault of the secondary coil of the engine, whether the open-circuit fault occurs in the secondary coil is determined by measuring the voltage at two pins of the primary coil and counting the total time length of high level occurrence and the fault limit value in one ignition period. When an open circuit fault occurs, the fault information is timely sent to the ECU, the torque output of the engine is limited, and the effects of protecting the engine and improving the driving safety are achieved.
The disclosed embodiment also provides a device for diagnosing an open-circuit fault of a secondary coil of an engine, which is used for executing the method for diagnosing an open-circuit fault of a secondary coil of an engine of the above embodiment, and fig. 5 is a schematic structural diagram of the device for diagnosing an open-circuit fault of a secondary coil of an engine according to an exemplary embodiment, and as shown in fig. 5, the device comprises:
a voltage detection module 501, configured to obtain a voltage at a pin of a primary coil of an engine;
the timing module 502 is used for counting the total time length of the high voltage appearing in an ignition cycle when the voltage is greater than or equal to a preset voltage threshold value and is the high voltage;
and the diagnosis module 503 is used for determining the open-circuit fault of the secondary coil of the engine when the total time length is greater than or equal to the preset time length threshold value.
In an optional embodiment, further comprising:
the enabling detection module is used for judging whether the system voltage is greater than or equal to a preset fault detection threshold value; if the system voltage is greater than or equal to the fault detection threshold, judging whether the engine is in a dynamic fuel cut-off state; if the engine is not in the dynamic fuel cut state, the engine is determined to meet the enabling condition of fault detection.
It should be noted that, when the diagnostic apparatus for an open-circuit fault of an engine secondary coil provided in the foregoing embodiment executes the diagnostic method for an open-circuit fault of an engine secondary coil, the above-mentioned division of each functional module is merely exemplified, and in practical applications, the above-mentioned function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules, so as to complete all or part of the above-mentioned functions. In addition, the diagnosis device for the open-circuit fault of the secondary coil of the engine provided by the above embodiment and the diagnosis method embodiment for the open-circuit fault of the secondary coil of the engine belong to the same concept, and details of the implementation process are shown in the method embodiment, which are not described herein again.
The embodiment of the present disclosure further provides an electronic device corresponding to the method for diagnosing an open-circuit fault of a secondary coil of an engine provided in the foregoing embodiment, so as to execute the method for diagnosing an open-circuit fault of a secondary coil of an engine.
Referring to fig. 6, a schematic diagram of an electronic device provided in some embodiments of the present application is shown. As shown in fig. 6, the electronic apparatus includes: the processor 600, the memory 601, the bus 602 and the communication interface 603, wherein the processor 600, the communication interface 603 and the memory 601 are connected through the bus 602; the memory 601 stores a computer program operable on the processor 600, and the processor 600 executes the method for diagnosing the open-circuit fault of the secondary coil of the engine provided in any of the foregoing embodiments when executing the computer program.
The Memory 601 may include a high-speed Random Access Memory (RAM) and may further include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface 603 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, and the like can be used.
The electronic equipment provided by the embodiment of the application and the method for diagnosing the open-circuit fault of the secondary coil of the engine provided by the embodiment of the application have the same inventive concept and have the same beneficial effects as the method adopted, operated or realized by the electronic equipment.
Referring to fig. 7, the computer readable storage medium is an optical disc 700, on which a computer program (i.e., a program product) is stored, and when the computer program is executed by a processor, the computer program performs the method for diagnosing the open-circuit fault of the secondary coil of the engine according to any of the embodiments.
It should be noted that examples of the computer-readable storage medium may also include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory, or other optical and magnetic storage media, which are not described in detail herein.
The computer-readable storage medium provided by the above-mentioned embodiment of the present application and the method for diagnosing an open-circuit fault of a secondary coil of an engine provided by the embodiment of the present application have the same advantages as the method adopted, operated or implemented by the application program stored in the computer-readable storage medium.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. A method of diagnosing an open circuit fault in a secondary coil of an engine, comprising:
judging whether the system voltage is greater than or equal to a preset fault detection threshold value or not;
if the system voltage is larger than or equal to the fault detection threshold value, judging whether the engine is in a dynamic fuel cut-off state;
if the engine is not in the dynamic fuel cut-off state, determining that the engine meets an enabling condition of fault detection;
acquiring voltage at a pin of a primary coil of the engine;
when the voltage is greater than or equal to a preset voltage threshold value, the voltage is high voltage, and the total duration of the high voltage in one ignition cycle is counted; the method comprises the following steps: after entering detection, starting timing by a fault detection timer; when the voltage is greater than or equal to a preset voltage threshold, starting timing by a high level detection timer, and when the voltage is less than the preset voltage threshold, stopping timing by the high level detection timer; if the time in the current fault detection timer does not reach an ignition period, continuing to detect, and if the time reaches an ignition period, counting the total high-voltage occurrence time recorded by the high-level detection timer in the ignition period;
when the total time length is greater than or equal to a preset time length threshold value, determining that the secondary coil of the engine is in an open-circuit fault;
transmitting the failure information to an electronic control unit of the vehicle, and limiting an engine torque output, and voice-broadcasting the failure information.
2. The method of claim 1, further comprising:
and if the system voltage is less than the fault detection threshold value or the engine is in a dynamic fuel cut-off state, determining that the engine does not meet the enabling condition of fault detection.
3. The method of claim 1, wherein it is determined that there is no open circuit fault with the secondary winding of the engine when the total time period is less than a preset time period threshold.
4. An apparatus for diagnosing an open-circuit fault in a secondary coil of an engine, comprising:
the enabling detection module is used for judging whether the system voltage is greater than or equal to a preset fault detection threshold value; if the system voltage is larger than or equal to the fault detection threshold value, judging whether the engine is in a dynamic fuel cut-off state; if the engine is not in the dynamic fuel cut-off state, determining that the engine meets the enabling condition of fault detection;
the voltage detection module is used for acquiring the voltage at a pin of a primary coil of the engine;
the timing module is used for counting the total time length of the high voltage in an ignition period when the voltage is higher than or equal to a preset voltage threshold value and is a high voltage; the method comprises the following steps: after entering detection, starting timing by a fault detection timer; when the voltage is greater than or equal to a preset voltage threshold value, starting timing by a high level detection timer, and when the voltage is less than the preset voltage threshold value, stopping timing by the high level detection timer; if the time in the current fault detection timer does not reach an ignition period, continuing to detect, and if the time reaches an ignition period, counting the total high-voltage occurrence time recorded by the high-level detection timer in the ignition period;
the diagnosis module is used for determining the open-circuit fault of the secondary coil of the engine when the total time length is greater than or equal to a preset time length threshold;
and the control module is used for sending the fault information to an electronic control unit of the vehicle, limiting the torque output of the engine and broadcasting the fault information in voice.
5. An engine secondary coil open-circuit fault diagnosis apparatus comprising a processor and a memory storing program instructions, the processor being configured to perform the engine secondary coil open-circuit fault diagnosis method according to any one of claims 1 to 3 when executing the program instructions.
6. A computer readable medium having computer readable instructions stored thereon which are executable by a processor to implement a method of diagnosing an open circuit fault in a secondary coil of an engine as claimed in any one of claims 1 to 3.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8387598B2 (en) * | 2009-08-04 | 2013-03-05 | Fairchild Semiconductor Corporation | Ignition system open secondary detection |
| CN102852692B (en) * | 2011-07-01 | 2017-03-01 | 伍德沃德公司 | For having the multiplex drive circuit of the AC ignition system of Controlled in Current Mode and Based and fault tolerance detection |
| CN103941720B (en) * | 2014-03-24 | 2017-01-25 | 联合汽车电子有限公司 | Fault diagnosis circuit and method of internal-drive electrically-controlled ignition system |
| CN204827765U (en) * | 2015-07-17 | 2015-12-02 | 上海海洧汽车电子有限公司 | Ignition coil open circuit test platform |
| CN208106635U (en) * | 2018-03-26 | 2018-11-16 | 上海华依科技集团股份有限公司 | The cold pilot fire testboard bay of engine embedded drive ignition coil |
| CN109298281A (en) * | 2018-12-19 | 2019-02-01 | 重庆奇甫机械有限责任公司 | Ignition coil fault diagnosis system and method |
| CN109633509B (en) * | 2018-12-26 | 2021-02-02 | 北京经纬恒润科技股份有限公司 | Motor fault diagnosis system, method and readable storage medium |
| CN111123031B (en) * | 2019-12-18 | 2022-04-29 | 国网湖北省电力有限公司宜昌供电公司 | Fault detection method, low-voltage energy storage pre-operation set device, controller and system |
| CN111751654B (en) * | 2020-05-18 | 2022-06-03 | 深圳供电局有限公司 | Power system fault processing method and device, computer equipment and medium |
| CN112485664B (en) * | 2020-11-27 | 2022-08-09 | 国网宁夏电力有限公司电力科学研究院 | High-voltage circuit breaker diagnosis system and method, electronic terminal and storage medium |
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