CN116816925A

CN116816925A - Fault diagnosis method, device, equipment and medium for transmission gear shifting system

Info

Publication number: CN116816925A
Application number: CN202310786627.3A
Authority: CN
Inventors: 张涛; 刘国栋; 宁甲奎; 张荣辉; 马岩
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2023-09-29

Abstract

The embodiment of the invention discloses a fault diagnosis method, device, equipment and medium for a gear shifting system of a transmission. The fault diagnosis method of the transmission gear shifting system specifically can comprise the following steps: under the condition that a diagnosis activating instruction of a gear shifting system to be diagnosed is received, determining a current vehicle state corresponding to the gear shifting system to be diagnosed; under the condition that the current vehicle state meets the vehicle power-on state condition, performing first fault diagnosis on the gear shifting system to be diagnosed; and under the condition that the current vehicle state meets the vehicle start state condition, performing second fault diagnosis on the gear shifting system to be diagnosed. The technical scheme of the embodiment of the invention can accurately diagnose the fault of the transmission gear shifting system, thereby improving the stability of the transmission gear shifting system.

Description

Fault diagnosis method, device, equipment and medium for transmission gear shifting system

Technical Field

The embodiment of the invention relates to the technical field of automobiles, in particular to a fault diagnosis method, device, equipment and medium for a gear shifting system of a transmission.

Background

Existing vehicular transmission shift systems typically use DCT (Dual Clutch Transmission, dual clutch automatic transmission) shift systems. In the prior art, fault diagnosis can be automatically carried out on a transmission gear shifting system in the running process of a vehicle, and fault codes corresponding to faults can be recorded when the faults occur, so that the current state of the gear shifting system of a driver is effectively reminded.

However, when fault diagnosis is performed on the transmission gear shifting system in the running process of the vehicle, the detection range is overlarge, and the detection precision is low, so that the performance state of the transmission gear shifting system cannot be accurately diagnosed, and the stability of the transmission gear shifting system is reduced.

Disclosure of Invention

The embodiment of the invention provides a fault diagnosis method, device, equipment and medium for a transmission gear shifting system, which can accurately diagnose the fault of the transmission gear shifting system, thereby improving the stability of the transmission gear shifting system.

According to an aspect of the present invention, there is provided a fault diagnosis method of a transmission shift system, including:

under the condition that a diagnosis activating instruction of a gear shifting system to be diagnosed is received, determining a current vehicle state corresponding to the gear shifting system to be diagnosed;

Under the condition that the current vehicle state meets the vehicle power-on state condition, performing first fault diagnosis on the gear shifting system to be diagnosed;

and under the condition that the current vehicle state meets the vehicle start state condition, performing second fault diagnosis on the gear shifting system to be diagnosed.

According to another aspect of the present invention, there is provided a fault diagnosis apparatus of a transmission shift system, including:

the vehicle state determining module is used for determining the current vehicle state corresponding to the gear shifting system to be diagnosed under the condition that a diagnosis activating instruction of the gear shifting system to be diagnosed is received;

the first fault diagnosis module is used for carrying out first fault diagnosis on the gear shifting system to be diagnosed under the condition that the current vehicle state meets the condition of the vehicle power-on state;

and the second fault diagnosis module is used for carrying out second fault diagnosis on the gear shifting system to be diagnosed under the condition that the current vehicle state meets the condition of the vehicle starting state.

According to another aspect of the present invention, there is provided an electronic apparatus including:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein,,

The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the fault diagnosis method of the transmission shift system according to any one of the embodiments of the present invention.

According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to execute a fault diagnosis method of a transmission shift system according to any one of the embodiments of the present invention.

According to the technical scheme, the current vehicle state corresponding to the gear shifting system to be diagnosed is determined when the diagnosis activating instruction of the gear shifting system to be diagnosed is received, so that the first fault diagnosis is conducted on the gear shifting system to be diagnosed when the current vehicle state meets the condition of the power-on state of the vehicle, and the second fault diagnosis is conducted on the gear shifting system to be diagnosed when the current vehicle state meets the condition of the power-on state of the vehicle, the problem that the fault of the gear shifting system of the transmission cannot be accurately diagnosed in the prior art is solved, the fault diagnosis can be conducted on the gear shifting system of the transmission, and therefore the stability of the gear shifting system of the transmission is improved.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a method for fault diagnosis of a transmission shift system provided in accordance with an embodiment of the present invention;

FIG. 2 is a flow chart of a method for fault diagnosis of a transmission shift system provided in accordance with a second embodiment of the present invention;

FIG. 3 is an exemplary flowchart of a fault diagnosis method for a transmission shift system provided in accordance with a third embodiment of the present invention;

FIG. 4 is an exemplary flowchart of a fault diagnosis method for another transmission shift system provided by a third embodiment of the present invention;

FIG. 5 is a schematic illustration of a fault diagnosis apparatus for a transmission shift system provided in accordance with a fourth embodiment of the present invention;

Fig. 6 is a schematic structural view of an electronic device implementing a failure diagnosis method of a transmission shift system according to an embodiment of the present invention.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example 1

Fig. 1 is a flowchart of a fault diagnosis method for a transmission gear shift system according to a first embodiment of the present invention, where the method may be applied to a case of accurately performing fault diagnosis on a transmission gear shift system, and the method may be performed by a fault diagnosis device for a transmission gear shift system, where the device may be implemented by software and/or hardware, and may be generally directly integrated into an electronic device that performs the method, where the electronic device may be a terminal device or a server device, and the embodiment of the present invention does not limit the type of electronic device that performs the fault diagnosis method for a transmission gear shift system. Specifically, as shown in fig. 1, the fault diagnosis method of the transmission gear shifting system specifically may include the following steps:

s110, under the condition that a diagnosis activating instruction of a gear shifting system to be diagnosed is received, determining a current vehicle state corresponding to the gear shifting system to be diagnosed.

The gear shifting system to be diagnosed can be any double-clutch transmission gear shifting system needing fault diagnosis. The diagnosis activation instruction may be an instruction to activate a fault diagnosis of the shift system to be diagnosed. It will be appreciated that the diagnostic activation instructions may be automatically sent by the instrument (e.g., by the diagnostic instrument), may be sent by an engineer via a command line, etc., and that embodiments of the present invention are not limited in this regard. The current vehicle state may be a current state of a vehicle in which the shift system is to be diagnosed. Alternatively, the current vehicle state may be one or more of a current vehicle ignition switch state, a current vehicle engine state, a current vehicle motion state, a current vehicle electronic hand brake state, a current vehicle shift handle position, and a current vehicle battery voltage.

In the embodiment of the invention, when a diagnosis activating instruction of the gear shifting system to be diagnosed is received, the current vehicle state corresponding to the gear shifting system to be diagnosed is determined. It will be appreciated that if a diagnostic activation instruction for the shift system to be diagnosed is not received, indicating that the shift system to be diagnosed is not to be fault diagnosed, the diagnostic activation instruction may be waited for until the diagnostic activation instruction is received.

And S120, performing first fault diagnosis on the gear shifting system to be diagnosed under the condition that the current vehicle state meets the vehicle power-on state condition.

The vehicle power-on state condition may be a condition corresponding to a current vehicle state when the vehicle is in a power-on state. For example, the vehicle power-up state conditions may include a current vehicle ignition switch state being on, a current vehicle engine state being inactive, a current vehicle motion state being stationary, a current vehicle electronic hand brake state being active, a current vehicle shift lever position being a P-range (park) position, and a current vehicle battery voltage not less than 11V (volts). The first fault diagnosis may be a fault diagnosis of the shift system to be diagnosed when the current vehicle state satisfies the vehicle power-on state condition.

In the embodiment of the invention, after the current vehicle state corresponding to the gear shifting system to be diagnosed is determined, whether the current vehicle state meets the condition of the vehicle power-on state can be further determined, and the first fault diagnosis is performed on the gear shifting system to be diagnosed when the current vehicle state meets the condition of the vehicle power-on state. It can be appreciated that in the process of performing the first fault diagnosis on the gear shift system to be diagnosed, if the current vehicle state changes and the vehicle power-on state condition is no longer satisfied, the first fault diagnosis can be exited, and the fault diagnosis on the gear shift system to be diagnosed is ended.

And S130, performing second fault diagnosis on the gear shifting system to be diagnosed under the condition that the current vehicle state meets the vehicle start state condition.

The vehicle start state condition may be a condition corresponding to a current vehicle state when the vehicle engine is in a start state. For example, the vehicle power-on state conditions may include the current vehicle ignition switch state being on, the current vehicle engine state being idle, the current vehicle motion state being stationary, the current vehicle electronic hand brake state being active, and the current vehicle shift lever position being a P range position. The second fault diagnosis may be a fault diagnosis of the shift system to be diagnosed when the current vehicle state satisfies the vehicle start state condition.

In the embodiment of the invention, after the current vehicle state corresponding to the gear shifting system to be diagnosed is determined, whether the current vehicle state meets the condition of the vehicle starting state can be further determined, and the gear shifting system to be diagnosed is subjected to second fault diagnosis when the current vehicle state meets the condition of the vehicle starting state. It can be understood that in the process of performing the second fault diagnosis on the gear shifting system to be diagnosed, if the current vehicle state changes and the condition of the vehicle start state is no longer satisfied, the second fault diagnosis can be exited, and the fault diagnosis on the gear shifting system to be diagnosed is ended.

According to the technical scheme, the current vehicle state corresponding to the gear shifting system to be diagnosed is determined when the diagnosis activating instruction of the gear shifting system to be diagnosed is received, so that the first fault diagnosis is conducted on the gear shifting system to be diagnosed when the current vehicle state meets the condition of the power-on state of the vehicle, and the second fault diagnosis is conducted on the gear shifting system to be diagnosed when the current vehicle state meets the condition of the power-on state of the vehicle, the problem that the fault of the gear shifting system of the transmission cannot be accurately diagnosed in the prior art is solved, the fault diagnosis can be conducted on the gear shifting system of the transmission accurately, and therefore stability of the gear shifting system of the transmission is improved.

Example two

Fig. 2 is a flowchart of a fault diagnosis method for a transmission gear shifting system according to a second embodiment of the present invention, where the technical solutions described above are further refined, and various specific alternative implementations of performing a first fault diagnosis on the gear shifting system to be diagnosed when it is determined that the current vehicle state meets a vehicle power-on state condition, and performing a second fault diagnosis on the gear shifting system to be diagnosed when it is determined that the current vehicle state meets a vehicle power-on state condition are provided. The technical solution in this embodiment may be combined with each of the alternatives in one or more embodiments described above. As shown in fig. 2, the method may include the steps of:

s210, under the condition that a diagnosis activating instruction of a gear shifting system to be diagnosed is received, determining a current vehicle state corresponding to the gear shifting system to be diagnosed.

S220, under the condition that the current vehicle state meets the vehicle power-on state condition, performing first electrical fault diagnosis on a shifting fork position sensor of the gear shifting system to be diagnosed.

Wherein, the fork position sensor may be a sensor capable of detecting fork position information. The first electrical fault diagnosis may be diagnosis of an electrical fault of the fork position sensor when the current vehicle state satisfies a vehicle power-on state condition.

In the embodiment of the invention, after the current vehicle state corresponding to the gear shifting system to be diagnosed is determined, whether the current vehicle state meets the vehicle power-on state condition or not can be further determined, and when the current vehicle state meets the vehicle power-on state condition, the first electric fault diagnosis is performed on the shifting fork position sensor of the gear shifting system to be diagnosed.

And S230, under the condition that the shifting fork position sensor is determined to have no first electrical fault, determining first voltage change data of the shifting fork position sensor.

Wherein the first electrical fault may be an electrical fault of the fork position sensor when the current vehicle state satisfies the vehicle power-on state condition. The first voltage variation data may be voltage variation data of the fork position sensor when the current vehicle state satisfies the vehicle power-on state condition.

In the embodiment of the invention, after the first electrical fault diagnosis is performed on the shifting fork position sensor of the gear shifting system to be diagnosed, whether the first electrical fault exists in the shifting fork position sensor or not can be further determined, and the first voltage change data of the shifting fork position sensor is determined when the first electrical fault does not exist in the shifting fork position sensor. It will be appreciated that if there is a first electrical fault in the fork position sensor, corresponding fault data may be generated according to the first electrical fault, and the fault diagnosis of the shift system to be diagnosed may be ended. Alternatively, the fault data may be a multi-dimensional array, such as a 100-dimensional 16-ary array.

S240, performing first voltage fault diagnosis on the shifting fork position sensor according to the first voltage change data.

The first voltage fault diagnosis may be to diagnose a voltage fault of the shift fork position sensor when the current vehicle state satisfies a vehicle power-on state condition.

In the embodiment of the invention, after the first voltage change data of the shifting fork position sensor is determined, the first voltage fault diagnosis can be further performed on the shifting fork position sensor according to the first voltage change data.

Optionally, performing the first voltage fault diagnosis on the shift fork position sensor according to the first voltage change data may include determining that the shift fork position sensor has the first voltage fault when the first voltage change data exceeds the voltage change threshold value, and determining that the shift fork position sensor does not have the first voltage fault when the first voltage change data does not exceed the voltage change threshold value. The first voltage fault may be a voltage fault of the fork position sensor when the current vehicle state satisfies a vehicle power-on state condition. For example, the voltage change threshold may be 0.1V, that is, it may be determined that the shift fork position sensor has the first voltage fault when the first voltage change data exceeds 0.1V, and it may be determined that the shift fork position sensor does not have the first voltage fault when the first voltage change data does not exceed 0.1V, thereby improving the diagnosis accuracy of the first voltage fault diagnosis.

It is understood that if the shift fork position sensor has the first voltage fault, corresponding fault data can be generated according to the first voltage fault, and fault diagnosis of the gear shifting system to be diagnosed is finished.

S250, judging whether a first fault diagnosis result of the gear shifting system to be diagnosed meets a first fault diagnosis passing condition or not.

The first fault diagnosis result may be a result of performing a first fault diagnosis of the shift system to be diagnosed. The first failure diagnosis passing condition may be a condition that the shift system to be diagnosed passes the first failure diagnosis.

In the embodiment of the invention, after the first fault diagnosis is performed on the gear shifting system to be diagnosed, whether the first fault diagnosis result of the gear shifting system to be diagnosed meets the first fault diagnosis passing condition can be further judged.

Optionally, determining whether the first fault diagnosis result of the gear shift system to be diagnosed meets the first fault diagnosis passing condition may include: under the condition that the shifting fork position sensor is determined to have a first electrical fault or the shifting fork position sensor is determined to have a first voltage fault, determining that a first fault diagnosis result does not meet a first fault diagnosis passing condition; and under the condition that the shifting fork position sensor is determined to have no first voltage fault, determining that the first fault diagnosis result meets the first fault diagnosis passing condition. It is understood that if the shift fork position sensor does not have the first voltage fault, it is indicated that the shift fork position sensor does not have the first electrical fault, that is, the shift fork position sensor does not have the first electrical fault nor the first voltage fault, it may be determined that the first fault diagnosis result satisfies the first fault diagnosis passing condition.

S260, performing second fault diagnosis on the gear shifting system to be diagnosed under the condition that the first fault diagnosis result meets the first fault diagnosis passing condition and the current vehicle state meets the vehicle start-up state condition.

In the embodiment of the invention, when the first fault diagnosis result meets the first fault diagnosis passing condition and the current vehicle state meets the vehicle start state condition, the second fault diagnosis is carried out on the gear shifting system to be diagnosed.

Optionally, performing the second fault diagnosis on the gear shift system to be diagnosed may include: performing gear shift fault diagnosis on a gear shift system to be diagnosed; and under the condition that the gear shifting system to be diagnosed does not have gear shifting faults, performing sensor fault diagnosis on the gear shifting system to be diagnosed.

The gear shift fault diagnosis can be to diagnose the gear shift fault of the gear shift system to be diagnosed when the current vehicle state meets the condition of the vehicle start state. The sensor fault diagnosis may be to diagnose a sensor fault of the shift system to be diagnosed when the current vehicle state satisfies the vehicle start state condition.

Specifically, when the first fault diagnosis result meets the first fault diagnosis passing condition and the current vehicle state meets the vehicle start state condition, gear shift fault diagnosis can be performed on the gear shift system to be diagnosed, and sensor fault diagnosis is performed on the gear shift system to be diagnosed when no gear shift fault exists in the gear shift system to be diagnosed.

Optionally, performing shift fault diagnosis on the to-be-diagnosed shift system may include: determining shaft gear position data of a gear shifting system to be diagnosed, and performing position fault diagnosis on the shaft gear of the gear shifting system to be diagnosed according to the shaft gear position data; generating a shaft off-hook instruction of a gear shifting system to be diagnosed under the condition that the position failure of the shaft gear is not determined; performing action fault diagnosis on a shifting fork of a gear shifting system to be diagnosed according to a shaft off-hook instruction; generating a gear closed loop picking instruction of a gear shifting system to be diagnosed under the condition that no action fault exists on the shifting fork; and performing the off-hook fault diagnosis on the shaft gear of the gear shifting system to be diagnosed according to the gear closed-loop off-hook instruction.

The shaft position data may be position data of a shaft position. The positional failure diagnosis may be a diagnosis of positional failure of the shaft shift position. The shaft off-hook command may be a command to off-hook the shaft gear to neutral. The operation failure diagnosis may be a diagnosis of an operation failure of the fork. The gear closed-loop picking and hanging instruction can be an instruction of closing and hanging the gear of the shaft. Alternatively, the gear closed loop off command may be a gear 1-7 and a gear R off command. The off-hook fault diagnosis may be a diagnosis of an off-hook fault for the shaft gear.

Specifically, when the first fault diagnosis result meets the first fault diagnosis passing condition and the current vehicle state meets the vehicle start-up condition, the shaft position data of the gear shifting system to be diagnosed can be determined, the position fault diagnosis is carried out on the shaft position of the gear shifting system to be diagnosed according to the shaft position data, so that a shaft off-hook instruction of the gear shifting system to be diagnosed is generated when the position fault does not exist in the shaft position, the action fault diagnosis is carried out on the shifting fork of the gear shifting system to be diagnosed according to the shaft off-hook instruction, and therefore a gear closed loop off-hook instruction of the gear shifting system to be diagnosed is generated when the action fault does not exist in the shifting fork, and the off-hook fault diagnosis is carried out on the shaft position of the gear shifting system to be diagnosed according to the gear closed loop off-hook instruction.

It is understood that performing the position fault diagnosis of the shaft gear of the gear shift system to be diagnosed according to the shaft gear position data may include determining that the shaft gear of the gear shift system to be diagnosed has no position fault when the shaft gear position data is neutral position data, and determining that the shaft gear of the gear shift system to be diagnosed has a position fault when the shaft gear position data is not neutral position data.

It will be appreciated that performing the action fault diagnosis of the fork of the gear shifting system to be diagnosed according to the shaft-off command may include determining command action data according to the shaft-off command and determining actual action data of the shaft gear, if the command action data and the actual action data match, determining that the fork has no action fault, and if the command action data and the actual action data do not match, determining that the fork has an action fault. That is, after the shaft off-hook instruction is received, the shift fork needs to execute instruction action data according to the shaft off-hook instruction, and if the instruction action data is not executed or the instruction action data is not matched with the actual action data, the shift fork can be determined to have action faults.

It is understood that performing the shift fault diagnosis on the shaft gear of the gear shifting system to be diagnosed according to the gear closed loop shift instruction may include determining instruction shift data according to the shaft gear closed loop shift instruction and determining actual shift data, if the instruction shift data matches with the actual shift data, determining that the shaft gear has no shift fault, and if the instruction shift data does not match with the actual shift data, determining that the shaft gear has a shift fault.

It is further understood that if there is a position failure in the shaft gear, or an action failure in the fork, or an extraction failure in the shaft gear, corresponding failure data may be generated, and the failure diagnosis of the shift system to be diagnosed is ended.

Optionally, performing sensor fault diagnosis on the gear shift system to be diagnosed may include: performing a second electrical fault diagnosis on a shift fork position sensor of the gear shifting system to be diagnosed; determining second voltage change data of the shifting fork position sensor under the condition that the shifting fork position sensor is determined to have no second electrical fault and a shifting fork control instruction is not received by a to-be-diagnosed shifting system; performing a second voltage fault diagnosis on the shift fork position sensor according to the second voltage change data; under the condition that the shifting fork position sensor is determined to have no second voltage fault, performing third electrical fault diagnosis on the rotating speed sensor of the gear shifting system to be diagnosed; determining the corresponding engine speed of the gear shifting system to be diagnosed under the condition that the speed sensor is determined to have no third electric fault and the gear shifting system to be diagnosed does not receive the shifting fork control command and the clutch control command; determining rotational speed change data of a rotational speed sensor under the condition that the rotational speed of the engine meets a preset rotational speed condition; and diagnosing the rotating speed fault of the rotating speed sensor according to the rotating speed change data.

The second electrical fault diagnosis may be to diagnose an electrical fault of the fork position sensor when the current vehicle state satisfies a vehicle start state condition. The second electrical fault may be an electrical fault of the fork position sensor when the current vehicle state satisfies a vehicle start-up state condition. The fork control command may be a command to control the fork. The second voltage variation data may be voltage variation data of the fork position sensor when the current vehicle state satisfies the vehicle start state condition. The second voltage fault diagnosis may be diagnosis of a voltage fault of the fork position sensor when the current vehicle state satisfies a vehicle start-up state condition. The second voltage fault may be a voltage fault of the fork position sensor when the current vehicle state satisfies a vehicle start-up state condition. The third electrical fault diagnosis may be to diagnose an electrical fault with the rotational speed sensor when the current vehicle state satisfies the vehicle start-up state condition. The third electrical fault may be an electrical fault of the rotational speed sensor when the current vehicle state satisfies a vehicle start state condition. The clutch control command may be a command to control the clutch. The preset rotation speed condition may be a preset rotation speed condition, for example, a rotation speed stabilizing condition, which is not limited in the embodiment of the present invention. The rotational speed change data may be data of rotational speed change of the rotational speed sensor. The diagnosis of the rotation speed fault may be to diagnose the rotation speed fault of the rotation speed sensor when the current vehicle state satisfies the vehicle start state condition.

Specifically, when the first fault diagnosis result meets the first fault diagnosis passing condition and the current vehicle state meets the vehicle start-up condition, the gear shift fault diagnosis can be performed on the gear shift system to be diagnosed, the second electrical fault diagnosis is performed on the shift fork position sensor of the gear shift system to be diagnosed when the gear shift system to be diagnosed does not have the gear shift fault, the second voltage change data of the shift fork position sensor is determined when the shift fork position sensor does not have the second electrical fault and the gear shift system to be diagnosed does not receive the shift fork control instruction, the second voltage fault diagnosis is performed on the shift fork position sensor according to the second voltage change data, the third electrical fault diagnosis is performed on the rotation speed sensor of the gear shift system to be diagnosed when the shift fork position sensor does not have the second voltage fault, the engine rotation speed corresponding to the gear shift system to be diagnosed is determined when the gear shift fork position sensor does not have the gear shift fault, the rotation speed change data of the rotation speed sensor is determined when the engine rotation speed meets the preset condition, and the rotation speed fault diagnosis is performed on the rotation speed sensor according to the rotation speed change data.

Optionally, performing the second voltage fault diagnosis on the shift fork position sensor according to the second voltage variation data may include determining that the shift fork position sensor has the second voltage fault when the second voltage variation data exceeds the voltage variation threshold, and determining that the shift fork position sensor does not have the second voltage fault when the second voltage variation data does not exceed the voltage variation threshold. For example, the voltage change threshold may be 0.1V, that is, it may be determined that the shift fork position sensor has the second voltage fault when the second voltage change data exceeds 0.1V, and it may be determined that the shift fork position sensor does not have the second voltage fault when the second voltage change data does not exceed 0.1V, thereby improving the diagnosis accuracy of the second voltage fault diagnosis.

Optionally, the diagnosing of the rotation speed fault of the rotation speed sensor according to the rotation speed change data may include determining that the rotation speed sensor has the rotation speed fault when the rotation speed change data exceeds the rotation speed change threshold value, and determining that the rotation speed sensor has no rotation speed fault when the rotation speed change data does not exceed the rotation speed change threshold value. For example, the rotational speed change threshold may be 2rpm (revolutions per minute), that is, it may be determined that the rotational speed sensor has a rotational speed failure when the rotational speed change data exceeds 2rpm, and it may be determined that the rotational speed sensor does not have a rotational speed failure when the rotational speed change data does not exceed 2rpm, thereby improving the diagnostic accuracy of the rotational speed failure diagnosis.

It will be appreciated that if there is a second electrical fault in the shift fork position sensor, or a second voltage fault in the shift fork position sensor, or a third electrical fault in the rotation speed sensor, or a rotation speed fault in the rotation speed sensor, corresponding fault data may be generated, and the fault diagnosis of the gear shift system to be diagnosed is ended.

According to the technical scheme, the current vehicle state corresponding to the to-be-diagnosed shifting system is determined when the diagnosis activating instruction of the to-be-diagnosed shifting system is received, and when the current vehicle state meets the vehicle power-on state condition, the shifting fork position sensor of the to-be-diagnosed shifting system performs first electric fault diagnosis, so that first voltage change data of the shifting fork position sensor are determined when the shifting fork position sensor does not have first electric faults, the shifting fork position sensor is subjected to first voltage fault diagnosis according to the first voltage change data, whether a first fault diagnosis result of the to-be-diagnosed shifting system meets the first fault diagnosis passing condition is judged, and when the first fault diagnosis result meets the first fault diagnosis passing condition, the to-be-diagnosed shifting system performs second fault diagnosis, the problem that the transmission shifting system cannot be accurately diagnosed in the prior art is solved, and the transmission shifting system can be accurately subjected to fault diagnosis, so that the stability of the transmission shifting system is improved.

Example III

In order to better understand the fault diagnosis method of the transmission shift system according to the present embodiment by those skilled in the art, a specific example will be described below, and fig. 3 is an exemplary flowchart of a fault diagnosis method of a transmission shift system according to the third embodiment of the present invention, and fig. 4 is an exemplary flowchart of a fault diagnosis method of another transmission shift system according to the third embodiment of the present invention, and as shown in fig. 3 and 4, the method may specifically include:

(1) And (5) powering on to prepare for self-diagnosis. Specifically, first, a tested controller (i.e., a gear shifting system of a tested transmission) is powered on, an ignition switch is turned on, an engine is kept in an unactuated state, a gear shifting handle is placed in a P gear, a vehicle is kept stationary, EPB (Electrical Park Brake, electronic parking brake system) is activated in an electronic parking manner, and a storage battery voltage is not lower than 11V. And secondly, reading the comprehensive data of the controller and checking the version data state of the controller. It will be appreciated that the controller complex data may be read by the diagnostic apparatus or by the simulation platform using a command line.

(2) Triggering a power-on self-diagnosis function to perform power-on self-diagnosis on the tested controller. It can be understood that the power-on self-diagnosis function can be triggered by the diagnostic apparatus, or can be triggered by the simulation platform by using a command line.

Specifically, performing power-on self-diagnosis on the tested controller may include: judging whether the shifting fork position sensor has an electrical fault, recording a corresponding fault (namely, a self-diagnosis result) if the shifting fork position sensor has the fault, judging whether the voltage change of the shifting fork position sensor exceeds 0.1V during the power-on self-diagnosis period if the voltage change exceeds 0.1V, and recording the fault if the voltage change exceeds 0.1V.

(3) And (5) starting up to prepare for self-diagnosis. Specifically, an ignition switch is turned on, an engine is started, a gear shifting handle is placed in a P gear, a vehicle is kept stationary, and EPB electronic parking is activated.

(4) Triggering a start-up self-diagnosis function and performing start-up self-diagnosis on the tested controller. It can be understood that the start-up self-diagnosis function can be triggered by the diagnostic apparatus, or can be triggered by the simulation platform by using a command line.

Specifically, the method for performing start-up self-diagnosis on the tested controller comprises the following steps: judging whether the shaft gear is empty; judging the action condition of the shifting fork after the shaft is in a hollow off command; the gear closed loop is picked and hung, and the gear closed loop is sequentially picked and hung according to 1-7 and R gears for testing; if the fork position sensor is in electrical fault, corresponding faults are recorded if the fork position sensor is in fault, judging whether the voltage change of the fork position sensor exceeds 0.1V when no fork control command is given during the self-diagnosis of the starting machine, and if the voltage change exceeds 0.1V, the faults are recorded; judging whether the rotation speed sensor has an electrical fault, recording the corresponding fault if the rotation speed sensor has the fault, judging whether the rotation speed sensor has the electrical fault or not when no shifting fork control command and no clutch control command exist in the self-diagnosis period of starting the engine and the rotation speed of the engine is stable, and recording the fault if the rotation speed variation of the rotation speed sensor exceeds 2 rpm.

It will be appreciated that the fault log will not be cleared after the fault has disappeared. It is further understood that the self-diagnostic process may be exited when any of the vehicle condition conditions is not met, or the self-diagnostic process may be exited when a fault is diagnosed.

According to the technical scheme, the fault diagnosis is carried out on the transmission gear shifting system in the vehicle stationary state, so that the stability of the DCT transmission gear shifting system can be better ensured, and the fault diagnosis can be carried out on the transmission gear shifting system before the vehicle leaves the factory, so that the quality requirement of the DCT transmission gear shifting system before the vehicle leaves the factory is ensured, the quality standard condition of the DCT transmission gear shifting system before the vehicle leaves the factory is effectively ensured, and the performance of the DCT transmission gear shifting system is more in accordance with the design requirement; the diagnosis accuracy is higher, and the problem in the aspect of performance is easier to find.

Example IV

Fig. 5 is a schematic diagram of a fault diagnosis apparatus for a transmission shift system according to a fourth embodiment of the present invention, as shown in fig. 5, the apparatus includes: a vehicle state determination module 510, a first fault diagnosis module 520, and a second fault diagnosis module 530, wherein:

the vehicle state determining module 510 is configured to determine a current vehicle state corresponding to a shift system to be diagnosed when a diagnosis activation instruction of the shift system to be diagnosed is received;

A first fault diagnosis module 520, configured to perform a first fault diagnosis on the shift system to be diagnosed if it is determined that the current vehicle state meets a vehicle power-on state condition;

and a second fault diagnosis module 530, configured to perform a second fault diagnosis on the gear shift system to be diagnosed if it is determined that the current vehicle state meets a vehicle start state condition.

Optionally, the first fault diagnosis module 520 may be specifically configured to: performing a first electrical fault diagnosis on a shift fork position sensor of a gear shifting system to be diagnosed; determining first voltage variation data of the shift fork position sensor under the condition that the shift fork position sensor is determined to have no first electrical fault; and performing first voltage fault diagnosis on the shifting fork position sensor according to the first voltage change data.

Optionally, the second fault diagnosis module 530 may be specifically configured to: before performing second fault diagnosis on the gear shifting system to be diagnosed, judging whether a first fault diagnosis result of the gear shifting system to be diagnosed meets a first fault diagnosis passing condition or not; and under the condition that the first fault diagnosis result meets the first fault diagnosis passing condition and the current vehicle state meets the vehicle start state condition, performing second fault diagnosis on the gear shifting system to be diagnosed.

Optionally, the second fault diagnosis module 530 may be further configured to: under the condition that the shifting fork position sensor is determined to have a first electrical fault or the shifting fork position sensor is determined to have a first voltage fault, determining that a first fault diagnosis result does not meet a first fault diagnosis passing condition; and under the condition that the shifting fork position sensor is determined to have no first voltage fault, determining that the first fault diagnosis result meets the first fault diagnosis passing condition.

Optionally, the second fault diagnosis module 530 may be specifically configured to: performing gear shift fault diagnosis on a gear shift system to be diagnosed; and under the condition that the gear shifting system to be diagnosed does not have gear shifting faults, performing sensor fault diagnosis on the gear shifting system to be diagnosed.

Optionally, the second fault diagnosis module 530 may be further configured to: determining shaft gear position data of a gear shifting system to be diagnosed, and performing position fault diagnosis on the shaft gear of the gear shifting system to be diagnosed according to the shaft gear position data; generating a shaft off-hook instruction of a gear shifting system to be diagnosed under the condition that the position failure of the shaft gear is not determined; performing action fault diagnosis on a shifting fork of a gear shifting system to be diagnosed according to a shaft off-hook instruction; generating a gear closed loop picking instruction of a gear shifting system to be diagnosed under the condition that no action fault exists on the shifting fork; and performing the off-hook fault diagnosis on the shaft gear of the gear shifting system to be diagnosed according to the gear closed-loop off-hook instruction.

Optionally, the second fault diagnosis module 530 may be further configured to: performing a second electrical fault diagnosis on a shift fork position sensor of the gear shifting system to be diagnosed; determining second voltage change data of the shifting fork position sensor under the condition that the shifting fork position sensor is determined to have no second electrical fault and a shifting fork control instruction is not received by a to-be-diagnosed shifting system; performing a second voltage fault diagnosis on the shift fork position sensor according to the second voltage change data; under the condition that the shifting fork position sensor is determined to have no second voltage fault, performing third electrical fault diagnosis on the rotating speed sensor of the gear shifting system to be diagnosed; determining the corresponding engine speed of the gear shifting system to be diagnosed under the condition that the speed sensor is determined to have no third electric fault and the gear shifting system to be diagnosed does not receive the shifting fork control command and the clutch control command; determining rotational speed change data of a rotational speed sensor under the condition that the rotational speed of the engine meets a preset rotational speed condition; and diagnosing the rotating speed fault of the rotating speed sensor according to the rotating speed change data.

The fault diagnosis device of the transmission gear shifting system provided by the embodiment of the invention can execute the fault diagnosis method of the transmission gear shifting system provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.

Example five

Fig. 6 shows a schematic diagram of the structure of an electronic device 10 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.

As shown in fig. 6, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.

Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.

The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as a fault diagnosis method for a transmission shift system.

In some embodiments, the fault diagnosis method of the transmission shift system may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the fault diagnosis method of the transmission shift system described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the fault diagnosis method of the transmission shift system in any other suitable manner (e.g., by means of firmware).

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.

A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on 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.

To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.

The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.

It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.

The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. A fault diagnosis method of a transmission shift system, characterized by comprising:

2. The method of claim 1, wherein said first fault diagnosing the shift system to be diagnosed comprises:

performing a first electrical fault diagnosis on a fork position sensor of the gear shifting system to be diagnosed;

determining first voltage variation data of the shift fork position sensor under the condition that the shift fork position sensor is determined to have no first electrical fault;

and performing first voltage fault diagnosis on the shifting fork position sensor according to the first voltage change data.

3. The method of claim 2, further comprising, prior to said second fault diagnosing the shift system to be diagnosed:

judging whether a first fault diagnosis result of the gear shifting system to be diagnosed meets a first fault diagnosis passing condition or not;

and under the condition that the current vehicle state meets the vehicle start state condition, performing second fault diagnosis on the gear shifting system to be diagnosed, wherein the second fault diagnosis comprises the following steps:

and under the condition that the first fault diagnosis result meets the first fault diagnosis passing condition and the current vehicle state meets the vehicle start state condition, performing second fault diagnosis on the gear shifting system to be diagnosed.

4. A method according to claim 3, wherein said determining whether the first failure diagnosis result of the shift system to be diagnosed satisfies a first failure diagnosis passing condition comprises:

determining that the first fault diagnosis result does not meet the first fault diagnosis passing condition under the condition that the shifting fork position sensor has a first electrical fault or the shifting fork position sensor has a first voltage fault;

and under the condition that the shifting fork position sensor is determined to have no first voltage fault, determining that the first fault diagnosis result meets the first fault diagnosis passing condition.

5. A method according to claim 1 or 3, wherein said performing a second fault diagnosis of said shift system to be diagnosed comprises:

performing gear shifting fault diagnosis on the gear shifting system to be diagnosed;

and under the condition that the gear shifting system to be diagnosed does not have gear shifting faults, performing sensor fault diagnosis on the gear shifting system to be diagnosed.

6. The method of claim 5, wherein said diagnosing shift failure of said shift system to be diagnosed comprises:

determining the shaft gear position data of the gear shifting system to be diagnosed, and performing position fault diagnosis on the shaft gear of the gear shifting system to be diagnosed according to the shaft gear position data;

Generating a shaft off-hook instruction of the gear shifting system to be diagnosed under the condition that the position failure of the shaft gear is determined to be absent;

performing action fault diagnosis on a shifting fork of the gear shifting system to be diagnosed according to the shaft off-hook instruction;

generating a gear closed-loop picking instruction of the gear shifting system to be diagnosed under the condition that the shifting fork is determined to have no action fault;

and performing the off-hook fault diagnosis on the shaft gear of the gear shifting system to be diagnosed according to the gear closed-loop off-hook instruction.

7. The method of claim 5, wherein said diagnosing the shift system for diagnosis of sensor faults comprises:

performing a second electrical fault diagnosis on a fork position sensor of the gear shifting system to be diagnosed;

determining second voltage change data of the shifting fork position sensor under the condition that the shifting fork position sensor is determined to have no second electrical fault and the shifting fork control instruction is not received by the to-be-diagnosed shifting system;

performing a second voltage fault diagnosis on the shift fork position sensor according to the second voltage variation data;

under the condition that the shifting fork position sensor does not have a second voltage fault, performing third electrical fault diagnosis on the rotating speed sensor of the gear shifting system to be diagnosed;

Determining the corresponding engine speed of the gear shifting system to be diagnosed under the condition that the speed sensor is determined to have no third electrical fault and the gear shifting system to be diagnosed does not receive the shifting fork control instruction and the clutch control instruction;

determining rotational speed variation data of the rotational speed sensor under the condition that the rotational speed of the engine meets a preset rotational speed condition;

and diagnosing the rotating speed fault of the rotating speed sensor according to the rotating speed change data.

8. A fault diagnosis apparatus of a transmission shift system, characterized by comprising:

9. An electronic device, the electronic device comprising:

At least one processor; and

a memory communicatively coupled to the at least one processor; wherein,,

the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the fault diagnosis method of the transmission shift system of any one of claims 1-7.

10. A computer readable storage medium storing computer instructions for causing a processor to execute the fault diagnosis method of the transmission shift system according to any one of claims 1 to 7.