CN114109594B - Engine fire diagnosis method, engine fire diagnosis device, electronic equipment and storage medium - Google Patents
Engine fire diagnosis method, engine fire diagnosis device, electronic equipment and storage medium Download PDFInfo
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- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
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Abstract
The application discloses an engine misfire diagnosis method, an engine misfire diagnosis device, electronic equipment and a storage medium, wherein the engine misfire diagnosis method comprises the following steps: starting a fuel drive-associated engine of the hybrid vehicle when a drive mode of the hybrid vehicle is switched to a series drive mode of a fuel drive and an electric drive; detecting the generator torque fed back by a generator associated with the electric drive of the hybrid electric vehicle in real time; and diagnosing whether the engine has a misfire fault according to the generator torque. The method and the device solve the technical problem that the accuracy of misfire diagnosis of the hybrid electric vehicle is low in the prior art, and improve the accuracy of misfire diagnosis of the hybrid electric vehicle.
Description
Technical Field
The present disclosure relates to the field of engine technologies, and in particular, to a method and an apparatus for diagnosing engine misfire, an electronic device, and a storage medium.
Background
The engine fire refers to that one or more cylinders of an automobile engine cannot normally output power and generally appear on a real automobile, such as weak acceleration, idle speed jitter and the like, at present, an engine management system can automatically diagnose the body starting fire, if one or more cylinders in the engine fire, the cylinders on fire cannot do work, but the cylinders not on fire do work, unbalanced operation of engine cylinder blocks can appear, so that rotating speed fluctuation is caused, in the prior art, a rotating speed difference threshold value is calculated and set for each adjacent cylinder block of the engine, if the rotating speed fluctuation of the adjacent cylinder blocks of the engine exceeds a certain threshold value, the engine fire fault is diagnosed, however, in a series driving mode for a hybrid vehicle type, the engine does not participate in driving, the target rotating speed is maintained by a generator, so that the rotating speed fluctuation is very small, and the engine fire fault is difficult to be accurately detected.
Disclosure of Invention
The application mainly aims to provide an engine fire diagnosis method, an engine fire diagnosis device, electronic equipment and a storage medium, and aims to solve the technical problem that in the prior art, the accuracy of fire diagnosis of a hybrid electric vehicle is low.
In order to achieve the above object, the present application provides an engine misfire diagnostic method comprising:
starting a fuel drive-associated engine of the hybrid vehicle when a drive mode of the hybrid vehicle is switched to a series drive mode of a fuel drive and an electric drive;
detecting the generator torque fed back by a generator associated with the electric drive of the hybrid electric vehicle in real time;
and diagnosing whether the engine has a misfire fault according to the generator torque.
Preferably, the diagnosing whether the engine has a misfire fault based on the generator torque includes:
diagnosing a misfire fault with the engine when the generator torque is detected as a negative torque;
when it is detected that the generator torque is not negative torque, performing the steps of: and detecting the generator torque fed back by the generator of the hybrid electric vehicle in real time.
Preferably, the diagnosing the misfire malfunction of the engine when the generator torque is detected as a negative torque includes:
when the torque of the generator is detected to be negative torque, obtaining engine torque and engine target torque fed back by the engine;
and if the engine torque is matched with the engine target torque, diagnosing that the engine has a misfire fault.
Preferably, the diagnosing the misfire fault of the engine if the engine torque matches the engine target torque comprises:
if the engine torque is matched with the engine target torque, acquiring a current driving mode of the hybrid electric vehicle, an engine control mode of the engine and a generator control mode of the generator;
judging whether the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode simultaneously;
and if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, the engine is diagnosed to have the misfire fault.
Preferably, if the current driving mode is a series driving mode, the engine control mode is a torque control mode, and the generator control mode is a rotational speed control mode, the diagnosing the misfire failure of the engine includes:
if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, acquiring the running state of the engine;
and if the operation state is a normal operation state, diagnosing that the engine has a misfire fault.
Preferably, if the current driving mode is a series driving mode, the engine control mode is a torque control mode, and the generator control mode is a rotational speed control mode, the diagnosing the misfire failure of the engine includes:
if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, acquiring a rotating speed change rate of the engine;
and if the rotating speed change rate is smaller than the preset rotating speed change rate, diagnosing that the engine has the misfire fault.
Preferably, if the current driving mode is a series driving mode, the engine control mode is a torque control mode, and the generator control mode is a rotational speed control mode, the diagnosing the misfire failure of the engine includes:
if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, acquiring the fuel oil quantity of the hybrid electric vehicle;
and if the fuel quantity is larger than the preset fuel quantity value, diagnosing that the engine has a fire fault.
The application also provides an engine diagnosis device that catches fire, the engine diagnosis device that catches fire is applied to hybrid vehicle, the engine diagnosis device that catches fire includes:
the engine starting module is used for starting an engine related to fuel driving of the hybrid electric vehicle when the driving mode of the hybrid electric vehicle is switched to a series driving mode of fuel driving and electric driving;
the torque detection module is used for detecting the generator torque fed back by the generator associated with the electric drive of the hybrid electric vehicle in real time;
and the misfire fault diagnosis module is used for diagnosing whether the engine has the misfire fault according to the torque of the generator.
The present application further provides an electronic device, the electronic device is applied to a hybrid electric vehicle, the electronic device is an entity device, the electronic device includes: the present invention relates to a method for diagnosing engine misfire, and more particularly, to a method for diagnosing engine misfire, which includes the steps of the method for diagnosing engine misfire as described above.
The present application also provides a storage medium applied to a hybrid vehicle, the storage medium being a computer-readable storage medium having stored thereon a program implementing an engine misfire diagnostic method, the program implementing the steps of the engine misfire diagnostic method as described above when executed by a processor.
The present application also provides a computer program product comprising a computer program for a hybrid vehicle, which when executed by a processor implements the steps of the engine misfire diagnostic method as described above.
The application provides an engine fire diagnosis method, device, electronic equipment and storage medium, is applied to hybrid electric vehicle, through working as when hybrid electric vehicle's drive mode switches to fuel drive and electric drive's series drive mode, starts hybrid electric vehicle's the associated engine of fuel drive has realized the start-up of engine when switching to series drive mode, has got rid of the start fault problem of engine, through real-time detection hybrid electric vehicle's the generator torque of the electric drive associated generator feedback of hybrid electric vehicle, according to the diagnosis of generator torque whether the engine takes place the fire fault, has realized the monitoring to engine drive generator electricity generation process through the real-time detection to the generator torque promptly, and then has realized the diagnosis whether the engine power output breaks down, and then has realized the accurate diagnosis of engine fire fault, has overcome prior art and has carried out the technical problem that the diagnosis accuracy is low to hybrid electric vehicle that fires, has improved the diagnosis accuracy of firing to hybrid electric vehicle.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application 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 for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic flow chart diagram illustrating an embodiment of an engine misfire diagnostic method of the present application;
FIG. 2 is a schematic diagram of an apparatus structure of a hardware operating environment related to an engine misfire diagnostic method in an embodiment of the present application.
The objectives, features, and advantages of the present application will be further described with reference to the accompanying drawings.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
The engine fire refers to that one or more cylinders of an automobile engine cannot normally output power and the engine fire is expressed on an actual automobile, generally acceleration weakness, idle speed jitter and the like occur, at present, an engine management system can automatically diagnose the body starting fire, if one or more cylinders in the engine fire, the cylinders on fire cannot do work, but the cylinders not on fire do work, imbalance of operation of engine cylinder bodies can occur, so that rotating speed fluctuation is caused, in the prior art, a rotating speed difference threshold value is calculated and set for each adjacent cylinder body of the engine, if the rotating speed fluctuation of the adjacent cylinder bodies of the engine exceeds a certain threshold value, a fire fault is diagnosed, however, for a hybrid automobile type in a series driving mode, the engine continuously works in a high-efficiency area after the engine is started, the generator is driven by the engine to generate electricity, and the driving motor is used as a power source of the entire automobile to drive the entire automobile, namely, the engine does not participate in driving in the series mode, the generator maintains the target rotating speed, even if the internal of the engine does not continuously maintain combustion, the situation occurs, the generator can maintain the target rotating speed fluctuation by consuming the electric quantity of the battery on fire to further cause the rotating speed fluctuation of the engine to be very small, therefore, the power consumption of the engine can be accurately detected, and the fault of the engine can be greatly increased, and the difficulty of the fault can be greatly increased.
The embodiment of the application provides an engine misfire diagnostic method, which is applied to a hybrid electric vehicle in one embodiment of the engine misfire diagnostic method, and with reference to fig. 1, the engine misfire diagnostic method includes:
step S10, when the driving mode of the hybrid electric vehicle is switched to a series driving mode of fuel driving and electric driving, starting an engine related to the fuel driving of the hybrid electric vehicle;
in this embodiment, it should be noted that the engine misfire diagnostic method is applied to a hybrid electric vehicle, where the hybrid electric vehicle adopts a series hybrid power structure, and power components of the hybrid electric vehicle include an engine, a generator, an inverter, and a battery, etc., where the generator and the engine are rigidly connected to connect the engine associated with fuel oil drive and the generator associated with electric drive in series, so that the engine drives the generator to generate electricity, electric energy thereof is directly transmitted to the motor through the inverter, and a driving torque is generated by the motor to drive the vehicle, and the battery is used to balance output power of the generator and input power of the motor, when the output power of the generator is greater than power required by the motor (such as operating conditions of vehicle deceleration and coasting, low-speed driving, or short-time parking), the inverter controls the generator to charge the battery, and when the output power of the generator is less than power required by the motor (such as operating conditions of vehicle starting, acceleration, high-speed driving, climbing, etc.), the battery provides additional electric energy to the motor.
Specifically, when the driving mode of the hybrid electric vehicle is switched from a pure electric driving mode to a series driving mode of fuel oil driving and electric driving, the battery of the hybrid electric vehicle provides electric energy for the generator of the hybrid electric vehicle to drive the generator to output torque, so that the rotating speed of the engine of the hybrid electric vehicle is increased to be higher than an idle rotating speed, and the vehicle control unit of the hybrid electric vehicle sends an ignition instruction to the engine to start the engine.
In an implementation manner, when the driving mode of the hybrid vehicle is switched from the pure electric driving mode to the series driving mode of the fuel driving and the electric driving, determining whether an engine start prohibition flag exists, if the engine start prohibition flag does not exist, starting the engine related to the fuel driving of the hybrid vehicle, if the engine start prohibition flag exists, not starting the engine related to the fuel driving of the hybrid vehicle, keeping the current driving mode, and not switching to the series driving mode, optionally, after the step of the engine start prohibition flag exists, the method may further include: mode failure fault information can also be generated to prompt users and vehicle maintenance personnel of the current vehicle fault conditions.
In one embodiment, after the step of sending an ignition command to the engine by the hybrid vehicle controller, whether the engine is started is detected, and if the engine is started successfully, the steps of: the method includes the steps of detecting the torque of a generator fed back by a generator associated with electric drive of the hybrid electric vehicle in real time, if the engine fails to start, maintaining a current drive mode without switching to a series drive mode, and optionally after the step of failing to start the engine, the method may further include: and generating an engine starting failure fault to prompt a user and a vehicle maintenance worker of the current fault condition of the vehicle.
Step S20, detecting the generator torque fed back by a generator related to the electric drive of the hybrid electric vehicle in real time;
in this embodiment, it should be noted that, in a series driving mode of fuel driving and electric driving, an engine associated with the fuel driving is in a torque control mode, a generator associated with the electric driving is in a rotation speed control mode, the generator generates power according to engine torque output by the engine, and when the engine is on fire, the engine torque output by the engine is smaller than an engine target torque corresponding to electric energy required by a motor of the hybrid electric vehicle to drive the vehicle, so that a rotation speed of the generator is smaller than a target rotation speed corresponding to the electric energy required by the motor to drive the vehicle, and in the rotation speed control mode, the generator obtains electric energy from a battery to pull up the rotation speed of the generator to the target rotation speed, so that the generator performs reverse work, so that the engine torque of the generator changes, where the reverse work refers to the generator performing work on the engine.
Specifically, whether the generator torque fed back by the generator associated with the electric drive of the hybrid electric vehicle is in the normal torque value range of the generator in the series mode is detected in real time.
And S30, diagnosing whether the engine has a misfire fault according to the generator torque.
In this embodiment, specifically, it is determined whether the generator torque is in a normal torque value range of the generator in the series mode, that is, whether the engine provides all the torque to generate power, and then it is diagnosed whether the engine has a misfire fault, if the generator torque is in the normal torque value range of the generator in the series mode, it indicates that the engine can normally output an engine target torque corresponding to the electric energy required by the motor to drive the vehicle, that is, the engine does not have the misfire fault, and if the generator torque is not in the normal torque value range of the generator in the series mode, it indicates that the engine cannot normally output the engine target torque corresponding to the electric energy required by the motor to drive the vehicle, that is, the engine has the misfire fault.
In an implementable manner, the step of diagnosing whether the engine has a misfire fault based on the generator torque further includes:
and if the engine is diagnosed to have the fire fault according to the generator torque, generating a fault alarm to prompt a user and a vehicle maintenance worker about the current fault condition of the vehicle.
In an implementable manner, the step of diagnosing whether the engine has a misfire fault based on the generator torque further includes:
and switching the driving mode to a pure electric driving mode, and controlling the engine and the generator to stop so as to reduce hardware loss of the hybrid electric vehicle continuously working in a fault state and electric quantity waste caused by maintaining engine torque through battery electric quantity.
Preferably, the diagnosing whether the engine has a misfire fault based on the generator torque includes:
step A10, when the torque of the generator is detected to be negative torque, diagnosing that the engine has a misfire fault;
in this embodiment, specifically, when it is detected that the generator torque is a negative torque, it indicates that the generator applies work in a reverse direction to the engine to maintain a target rotation speed corresponding to the electric energy required by the motor-driven vehicle, and it indicates that the engine fails to normally output an engine target torque corresponding to the electric energy required by the motor-driven vehicle, that is, a misfire fault occurs in the engine, where an absolute value of the negative torque is a torque value output by the generator to the engine, and a negative value indicates that the generator torque output direction is a direction of the generator to the engine.
Preferably, the diagnosing the misfire malfunction of the engine when the generator torque is detected as a negative torque includes:
step B10, when the torque of the generator is detected to be negative torque, obtaining engine torque and engine target torque fed back by the engine;
and B20, if the engine torque is matched with the target engine torque, diagnosing that the engine has a misfire fault.
In this embodiment, specifically, when it is detected that the generator torque is a negative torque, an engine torque and an engine target torque fed back by the engine are obtained, if the engine torque matches the engine target torque, it is indicated that the engine target torque is maintained by both the engine torque and the negative torque, a misfire fault occurs in the engine, if the engine torque does not match the engine target torque, it is indicated that the engine torque output by the engine is smaller than the engine target torque, and the generator does not output a torque to the engine, a driving mode of the hybrid vehicle may change or other fault conditions may exist, the engine is not diagnosed to send the misfire fault, and optionally, it may be further examined whether another fault occurs in the hybrid vehicle, where the engine target torque is a torque corresponding to electric energy required by a motor of the hybrid vehicle to drive the vehicle.
Preferably, the diagnosing the misfire fault of the engine if the engine torque matches the engine target torque comprises:
step C10, if the engine torque is matched with the engine target torque, acquiring a current driving mode of the hybrid electric vehicle, an engine control mode of the engine and a generator control mode of the generator;
step C20, judging whether the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode simultaneously;
and C30, if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, diagnosing that the engine has the misfire fault.
In the present embodiment, it should be noted that the driving modes include an electric-only driving mode, a series driving mode, and the like, the engine control mode may be a torque control mode, a rotation speed control mode, a power control mode, and the like, and the generator control mode may be a torque control mode, a rotation speed control mode, a power control mode, and the like.
Specifically, if the engine torque matches the engine target torque, a current driving mode of the hybrid vehicle, an engine control mode of the engine, and a generator control mode of the generator are obtained, whether the current driving mode is a series driving mode, the engine control mode is a torque control mode, and the generator control mode is a rotational speed control mode is simultaneously established is determined, if any one or two of three conditions that the current driving mode is the series driving mode, the engine control mode is the torque control mode, and the generator control mode is the rotational speed control mode are simultaneously established, it is diagnosed that the engine has a misfire fault, if any one or two of the three conditions that the current driving mode is the series driving mode, the engine control mode is the torque control mode, and the generator control mode is the rotational speed control mode are not established, it is determined that the driving mode of the hybrid vehicle, the engine control mode, or the generator control mode has a change due to a working condition or a fault, and optionally, it may be further determined whether the hybrid vehicle has another fault.
Preferably, if the current driving mode is a series driving mode, the engine control mode is a torque control mode, and the generator control mode is a rotational speed control mode, the diagnosing the misfire failure of the engine includes:
step D10, if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, acquiring the running state of the engine;
and D20, if the operation state is a normal operation state, diagnosing that the engine has a misfire fault.
In the present embodiment, it should be noted that the operation state of the engine includes operation, failure, and/or deactivation.
Specifically, if the current drive mode is a series drive mode, the engine control mode is a torque control mode, and the generator control mode is a rotational speed control mode, the operating state of the engine is acquired, if the operating state is a normal operating state, the engine is diagnosed as having a misfire fault, if the operating state is an abnormal operating state, the engine is not diagnosed as having the misfire fault, and optionally, whether the hybrid electric vehicle has other faults or not may be further checked.
Preferably, if the current driving mode is a series driving mode, the engine control mode is a torque control mode, and the generator control mode is a rotational speed control mode, the diagnosing the misfire failure of the engine includes:
step E10, if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, acquiring a rotating speed change rate of the engine;
and E20, if the rotating speed change rate is smaller than a preset rotating speed change rate, diagnosing that the engine has a misfire fault.
In this embodiment, it should be noted that the rotation speed change rate of the engine is a change amount of the rotation speed of the engine in a unit time, the preset rotation speed change rate may be obtained in advance through calibration, and in an implementable manner, the preset rotation speed change rate is 50 revolutions.
Specifically, if the current driving mode is a series driving mode, the engine control mode is a torque control mode, and the generator control mode is a rotational speed control mode, the rotational speed change rate of the engine is acquired, if the rotational speed change rate is smaller than a preset rotational speed change rate, the engine is diagnosed as suffering from the misfire fault, if the rotational speed change rate is larger than the preset rotational speed change rate, the engine is not diagnosed as suffering from the misfire fault, and optionally, whether the hybrid electric vehicle suffers from other faults or not can be further checked.
Preferably, if the current driving mode is a series driving mode, the engine control mode is a torque control mode, and the generator control mode is a rotational speed control mode, the diagnosing the misfire failure of the engine includes:
step F10, if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, acquiring the fuel quantity of the hybrid electric vehicle;
and F20, if the fuel quantity is larger than a preset fuel quantity value, diagnosing that the engine has a misfire fault.
In this embodiment, it should be noted that the fuel quantity is a remaining fuel quantity available for the engine in the fuel tank of the hybrid electric vehicle, and the preset fuel quantity value may be obtained in advance through empirical data or real vehicle measurement.
Specifically, if the current driving mode is a series driving mode, the engine control mode is a torque control mode, and the generator control mode is a rotational speed control mode, the fuel quantity of the hybrid electric vehicle is acquired, if the fuel quantity is greater than a preset fuel quantity value, the engine is diagnosed to have a fire fault, if the fuel quantity is not greater than the preset fuel quantity value, the engine is not diagnosed to have the fire fault, and optionally, a fuel quantity too low prompt can be generated to remind a user of timely supplementing fuel.
In one embodiment, the diagnosing the misfire failure of the engine if the current driving mode is a series driving mode, the engine control mode is a torque control mode, and the generator control mode is a rotational speed control mode is simultaneously established includes:
if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, acquiring the running state of an engine, the rotating speed change rate of the engine and the fuel quantity of the hybrid electric vehicle;
if the operation state is a normal operation state, the rotation speed change rate is smaller than a preset rotation speed change rate, and the fuel quantity is larger than a preset fuel quantity value, the engine is diagnosed to have a fire fault;
if one or two of the three conditions that the running state is a normal running state, the rotating speed change rate is smaller than the preset rotating speed change rate and the fuel quantity is larger than the preset fuel quantity value are not satisfied, the engine is not diagnosed to have the misfire fault, and optionally, whether other faults occur in the hybrid electric vehicle can be further checked.
Step A20, when detecting that the generator torque is not negative torque, executing the steps of: and detecting the generator torque fed back by the generator of the hybrid electric vehicle in real time.
In this embodiment, specifically, when it is detected that the generator torque is not negative torque, it indicates that the engine can normally output the engine target torque corresponding to the electric energy required by the motor-driven vehicle, that is, the engine does not have a misfire fault, the steps of: and detecting the generator torque fed back by the generator of the hybrid electric vehicle in real time so as to continuously monitor the generator torque condition, thereby realizing the cyclic process of detecting the engine torque and judging the fire fault.
In the embodiment, when the driving mode of the hybrid electric vehicle is switched to the series driving mode, the engine of the hybrid electric vehicle is started, the starting of the engine in the series state is realized, the starting fault problem of the engine is solved, the generator torque fed back by the generator of the hybrid electric vehicle is detected in real time, and according to the generator torque, whether the engine has the fire fault or not is diagnosed, the monitoring of the power generation process of the engine driving generator according to the generator torque is realized, the diagnosis of whether the power output of the engine has the fault or not is realized, the accurate diagnosis of the engine fire fault is further realized, the technical problem that the accuracy of the fire diagnosis of the hybrid electric vehicle is low in the prior art is overcome, the accuracy of the fire diagnosis of the hybrid electric vehicle is improved, and the hardware loss of the hybrid electric vehicle continuously working in the fault state and the electric quantity waste caused by maintaining the engine torque through the electric quantity of the battery are further reduced.
The embodiment of the present application further provides an engine misfire diagnostic apparatus, which is applied to a hybrid electric vehicle, and includes:
the engine starting module is used for starting a fuel drive related engine of the hybrid electric vehicle when the drive mode of the hybrid electric vehicle is switched to a series drive mode of fuel drive and electric drive;
the torque detection module is used for detecting the generator torque fed back by the generator associated with the electric drive of the hybrid electric vehicle in real time;
and the misfire fault diagnosis module is used for diagnosing whether the engine has a misfire fault according to the torque of the generator.
Optionally, the misfire fault diagnostic module is further configured to:
diagnosing a misfire fault with the engine when the generator torque is detected as a negative torque;
when it is detected that the generator torque is not negative torque, performing the steps of: and detecting the generator torque fed back by the generator of the hybrid electric vehicle in real time.
Optionally, the misfire fault diagnostic module is further configured to:
when the torque of the generator is detected to be negative torque, obtaining engine torque and engine target torque fed back by the engine;
and if the engine torque is matched with the engine target torque, diagnosing that the engine has a misfire fault.
Optionally, the misfire fault diagnostic module is further operable to:
if the engine torque is matched with the engine target torque, acquiring a current driving mode of the hybrid electric vehicle, an engine control mode of the engine and a generator control mode of the generator;
judging whether the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode simultaneously;
if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, the engine is diagnosed to have a misfire fault.
Optionally, the misfire fault diagnostic module is further configured to:
if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, acquiring the running state of the engine;
and if the operation state is a normal operation state, diagnosing that the engine has a misfire fault.
Optionally, the misfire fault diagnostic module is further configured to:
if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, acquiring a rotating speed change rate of the engine;
and if the rotating speed change rate is smaller than the preset rotating speed change rate, diagnosing that the engine has the misfire fault.
Optionally, the misfire fault diagnostic module is further configured to:
if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, acquiring the fuel quantity of the hybrid electric vehicle;
and if the fuel quantity is larger than the preset fuel quantity value, diagnosing that the engine has a fire fault.
The engine fire diagnosis device provided by the invention adopts the engine fire diagnosis method, and solves the technical problem of low accuracy in fire diagnosis of a hybrid electric vehicle in the prior art. Compared with the prior art, the beneficial effects of the engine misfire diagnostic device provided by the embodiment of the invention are the same as those of the engine misfire diagnostic method provided by the embodiment, and other technical features of the engine misfire diagnostic device are the same as those disclosed by the method of the previous embodiment, which are not repeated herein.
An embodiment of the present invention provides an electronic device, where the electronic device is applied to a hybrid vehicle, and the electronic device includes: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the engine misfire diagnostic method in the above-described embodiments.
Referring now to FIG. 2, shown is a schematic diagram of an electronic device suitable for use in implementing embodiments of the present disclosure. The electronic devices in the embodiments of the present disclosure may include, but are not limited to, mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., car navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like. The electronic device shown in fig. 2 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present disclosure.
As shown in fig. 2, the electronic device may include a processing apparatus (e.g., a central processing unit, a graphic processor, etc.) that may perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM) or a program loaded from a storage apparatus into a Random Access Memory (RAM). In the RAM, various programs and data necessary for the operation of the electronic apparatus are also stored. The processing device, the ROM, and the RAM are connected to each other by a bus. An input/output (I/O) interface is also connected to the bus.
Generally, the following systems may be connected to the I/O interface: input devices including, for example, touch screens, touch pads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, and the like; output devices including, for example, liquid Crystal Displays (LCDs), speakers, vibrators, and the like; storage devices including, for example, magnetic tape, hard disk, etc.; and a communication device. The communication means may allow the electronic device to communicate wirelessly or by wire with other devices to exchange data. While the figures illustrate an electronic device with various systems, it is to be understood that not all illustrated systems are required to be implemented or provided. More or fewer systems may alternatively be implemented or provided.
In particular, the processes described above with reference to the flow diagrams may be implemented as computer software programs, according to embodiments of the present disclosure. For example, embodiments of the present disclosure 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 illustrated in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network via the communication means, or installed from a storage means, or installed from a ROM. The computer program, when executed by a processing device, performs the above-described functions defined in the methods of the embodiments of the present disclosure.
The electronic equipment provided by the invention adopts the engine fire diagnosis method in the embodiment, and solves the technical problem of low accuracy in fire diagnosis of the hybrid electric vehicle in the prior art. Compared with the prior art, the beneficial effects of the electronic device provided by the embodiment of the invention are the same as the beneficial effects of the engine misfire diagnosis method provided by the embodiment, and other technical features of the electronic device are the same as those disclosed in the method of the previous embodiment, which are not described herein again.
It should be understood that portions of the present disclosure may be implemented in hardware, software, firmware, or a combination thereof. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
The present embodiment provides a computer-readable storage medium, applied to a hybrid vehicle, having computer-readable program instructions stored thereon for executing the engine misfire diagnostic method in the above-described embodiment.
The computer readable storage medium provided by the embodiments of the present invention may be, for example, a USB flash disk, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, or device, or any combination thereof. 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 present embodiment, 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, or device. Program code embodied on a computer readable storage medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, optical cables, RF (radio frequency), etc., or any suitable combination of the foregoing.
The computer-readable storage medium may be embodied in an electronic device; or may be present alone without being incorporated into the electronic device.
The computer readable storage medium carries one or more programs which, when executed by the electronic device, cause the electronic device to: starting a fuel drive-associated engine of the hybrid vehicle when a drive mode of the hybrid vehicle is switched to a series drive mode of a fuel drive and an electric drive; detecting the generator torque fed back by a generator associated with the electric drive of the hybrid electric vehicle in real time; and diagnosing whether the engine has a misfire fault according to the generator torque.
Computer program code for carrying out operations for aspects of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C + +, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
The flowchart 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 and/or flowchart illustration, and combinations of blocks in the block diagrams and/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 modules described in the embodiments of the present disclosure may be implemented by software or hardware. Wherein the names of the modules do not in some cases constitute a limitation of the unit itself.
The computer readable storage medium provided by the invention stores computer readable program instructions for executing the engine misfire diagnosis method, and solves the technical problem of low accuracy of misfire diagnosis of a hybrid electric vehicle in the prior art. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the embodiment of the invention are the same as the beneficial effects of the engine misfire diagnosis method provided by the embodiment, and are not repeated herein.
The present application also provides a computer program product comprising a computer program for a hybrid vehicle, which computer program, when being executed by a processor, carries out the steps of the engine misfire diagnostic method as described above.
The computer program product solves the technical problem that the fire diagnosis accuracy of the hybrid electric vehicle is low in the prior art. Compared with the prior art, the beneficial effects of the computer program product provided by the embodiment of the invention are the same as the beneficial effects of the engine misfire diagnosis method provided by the embodiment, and details are not repeated herein.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (8)
1. An engine misfire diagnostic method characterized by being applied to a hybrid vehicle, the engine misfire diagnostic method comprising:
starting a fuel drive-associated engine of the hybrid vehicle when a drive mode of the hybrid vehicle is switched to a series drive mode of a fuel drive and an electric drive;
detecting the generator torque fed back by a generator associated with the electric drive of the hybrid electric vehicle in real time;
diagnosing whether a misfire fault occurs to the engine according to the generator torque;
wherein the diagnosing whether a misfire fault occurs in the engine according to the generator torque comprises:
when the torque of the generator is detected to be negative torque, obtaining engine torque and engine target torque fed back by the engine;
if the engine torque is matched with the engine target torque, acquiring a current driving mode of the hybrid electric vehicle, an engine control mode of the engine and a generator control mode of the generator;
judging whether the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode simultaneously;
and if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, the engine is diagnosed to have the misfire fault.
2. The engine misfire diagnostic method as recited in claim 1, wherein the diagnosing whether the engine misfire malfunction occurs based on the generator torque comprises:
when it is detected that the generator torque is not negative torque, performing the steps of: and detecting the generator torque fed back by the generator of the hybrid electric vehicle in real time.
3. The engine misfire diagnostic method as recited in claim 1, wherein the diagnosing the engine misfire failure if the current driving mode is a series driving mode, the engine control mode is a torque control mode, and the generator control mode is a rotational speed control mode is simultaneously established comprises:
if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, acquiring the running state of the engine;
and if the operation state is a normal operation state, diagnosing that the engine has a misfire fault.
4. The engine misfire diagnostic method as recited in claim 1, wherein the diagnosing the engine misfire failure if the current driving mode is a series driving mode, the engine control mode is a torque control mode, and the generator control mode is a rotational speed control mode is simultaneously established comprises:
if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, acquiring a rotating speed change rate of the engine;
and if the rotating speed change rate is smaller than the preset rotating speed change rate, diagnosing that the engine has the misfire fault.
5. The engine misfire diagnostic method as recited in claim 1, wherein the diagnosing the engine misfire failure if the current driving mode is a series driving mode, the engine control mode is a torque control mode, and the generator control mode is a rotational speed control mode is simultaneously established comprises:
if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, acquiring the fuel quantity of the hybrid electric vehicle;
and if the fuel quantity is larger than the preset fuel quantity value, diagnosing that the engine has a fire fault.
6. An engine misfire diagnostic apparatus that is applied to a hybrid vehicle, comprising:
the engine starting module is used for starting a fuel drive related engine of the hybrid electric vehicle when the drive mode of the hybrid electric vehicle is switched to a series drive mode of fuel drive and electric drive;
the torque detection module is used for detecting the generator torque fed back by the generator associated with the electric drive of the hybrid electric vehicle in real time;
the misfire fault diagnosis module is used for diagnosing whether the engine has a misfire fault according to the torque of the generator;
the misfire fault diagnosis module is further used for acquiring engine torque and engine target torque fed back by the engine when the generator torque is detected to be negative torque;
if the engine torque is matched with the engine target torque, acquiring a current driving mode of the hybrid electric vehicle, an engine control mode of the engine and a generator control mode of the generator;
judging whether the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode simultaneously;
and if the current driving mode is a series driving mode, the engine control mode is a torque control mode and the generator control mode is a rotating speed control mode, the engine is diagnosed to have the misfire fault.
7. An electronic apparatus, characterized in that the electronic apparatus is applied to a hybrid vehicle, the electronic apparatus comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein, the first and the second end of the pipe are connected with each other,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the steps of the engine misfire diagnostic method as recited in any of claims 1 to 5.
8. A storage medium applied to a hybrid vehicle, the storage medium being a computer-readable storage medium having stored thereon a program implementing an engine misfire diagnostic method, the program implementing the engine misfire diagnostic method being executed by a processor to implement the steps of the engine misfire diagnostic method as recited in any one of claims 1 to 5.
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| CN116220903B (en) * | 2023-02-02 | 2024-04-19 | 重庆赛力斯新能源汽车设计院有限公司 | Engine fire fault diagnosis method, device, server side and storage medium |
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