CN113448306A - Vehicle diagnostic device and vehicle diagnostic system - Google Patents
Vehicle diagnostic device and vehicle diagnostic system Download PDFInfo
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- CN113448306A CN113448306A CN202110191268.8A CN202110191268A CN113448306A CN 113448306 A CN113448306 A CN 113448306A CN 202110191268 A CN202110191268 A CN 202110191268A CN 113448306 A CN113448306 A CN 113448306A
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- 230000002159 abnormal effect Effects 0.000 claims description 17
- 208000024891 symptom Diseases 0.000 claims description 7
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- 238000001514 detection method Methods 0.000 description 17
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
- G05B23/0275—Fault isolation and identification, e.g. classify fault; estimate cause or root of failure
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Abstract
The invention provides a vehicle diagnosis device and a vehicle diagnosis system, which can evaluate the load state of each vehicle device or component, and diagnose the vehicle by integrating the evaluation of each vehicle device or component, thereby determining the failure risk of the vehicle to be diagnosed with high precision. The present invention relates to a vehicle diagnostic device that acquires driving information of a vehicle including operation information of vehicle devices or constituent parts thereof detected while the vehicle is traveling, estimates a load state of each vehicle device or constituent part thereof based on the acquired driving information, and generates diagnostic information of the vehicle based on the estimated load state of each vehicle device or constituent part thereof, and a vehicle diagnostic system including the vehicle diagnostic device.
Description
Technical Field
The present invention relates to a vehicle diagnostic device and a vehicle diagnostic system.
Background
Among the vehicles are the following vehicles: as functions of a mounted Electronic Control Unit (Electronic Control Unit, ECU) or the like, there is a failure diagnosis function of detecting a failure of a vehicle and recording a location (component) where the failure occurs or contents thereof in the form of a failure code, in addition to a Control function of the vehicle (for example, patent document 1). When a vehicle failure occurs, a trouble code is read from an ECU of the failed vehicle using a dedicated terminal held by a repair shop or a vehicle sales shop to specify a failure location or failure content.
The failure diagnosis function of the ECU is very useful in that it can appropriately perform failure diagnosis of a highly sophisticated vehicle, but it is a function on the premise that it is used after a failure occurs. In contrast, a vehicle diagnostic technique that can appropriately determine the risk of failure (failure symptom) before a vehicle failure occurs is desired. As such a vehicle diagnosis technique, for example, a technique disclosed in patent document 2 below is cited.
[ Prior art documents ]
[ patent document ]
[ patent document 1] Japanese patent application laid-open No. 2019-156148
[ patent document 2] Japanese patent laid-open No. 2013-246011
Disclosure of Invention
[ problems to be solved by the invention ]
The technique of patent document 2 relates to a diagnostic device that compares a plurality of threshold values set for the degree of deterioration in accordance with the degree of aging of a diagnostic vehicle with sensor detection values acquired from the diagnostic vehicle for the same diagnostic object item, and determines the degree of deterioration of the diagnostic vehicle in relation to the diagnostic object item.
Further, an excessive load may be applied to vehicle parts due to sudden acceleration/deceleration of the vehicle, or traveling under severe conditions (for example, traveling on a snow road). Therefore, the risk of failure also becomes high due to factors other than the passage of years. However, since the technique of patent document 2 is a technique for setting a threshold value for diagnosis in accordance with the degree of age of the vehicle, there is a possibility that the risk of failure cannot be appropriately determined with respect to a vehicle that has not passed through a predetermined period even when a high load is generated in the vehicle component.
The vehicle components include a drive system such as an engine and a transmission, a brake system such as a brake, a steering system such as a steering system, and various systems (device systems) having greatly different operating mechanisms or component parts such as other electric components. Therefore, it is preferable to evaluate the risk of failure for each vehicle part, but this is neither disclosed nor suggested in patent document 2.
In view of the above-described problems, it is an object of the present invention to provide a vehicle diagnostic apparatus and a vehicle diagnostic system that can determine a risk of failure of a vehicle to be diagnosed with high accuracy by evaluating a load state for each vehicle device or component and diagnosing the vehicle by integrating the evaluation of the vehicle device or component.
[ means for solving problems ]
The vehicle diagnostic device of the present invention acquires driving information of the vehicle 10 including operation information of vehicle devices or constituent parts thereof detected while the vehicle is traveling, estimates a load state of each of the vehicle devices or constituent parts thereof based on the acquired driving information, and generates diagnostic information of the vehicle 10 based on the estimated load state of each of the vehicle devices or constituent parts thereof.
According to the vehicle diagnostic device of the present invention, at the time of vehicle diagnosis, the load state is evaluated for each vehicle component based on the driving information of the vehicle including the vehicle component operation information at the time of traveling, and therefore the risk of failure of the diagnosis target vehicle can be determined with high accuracy.
In the vehicle diagnosis device according to the present invention, the driving information may include the number of times of generation of a failure sign code generated when an operation command value transmitted from the electronic control unit 11 of the vehicle 10 to the vehicle device is different from an operation measured value of the vehicle device by a predetermined time, and the load state of at least one of the vehicle device or a component thereof may be evaluated based on the number of times of generation of the failure sign code.
According to the vehicle diagnostic device of the embodiment, the load state of at least one of the vehicle components is evaluated based on the number of times of generation of the failure sign code generated based on the deviation situation between the operation command value from the electronic control device and the operation actual measurement value of the vehicle component and the running accumulated distance of the vehicle, and therefore the failure sign that is not evaluated as a failure in the failure diagnostic function of the electronic control device can be accurately detected. As a result, the risk of failure of the diagnosis target vehicle can be determined with higher accuracy.
Further, in the vehicle diagnosis device according to the present invention, the driving information may include a number of abnormal sound occurrences extracted from sound information emitted from the vehicle device or a component thereof, and the load state of at least one of the vehicle device or the component thereof may be evaluated based on the number of abnormal sound occurrences.
According to the vehicular diagnostic apparatus of the embodiment, the load state of the vehicular part is evaluated based on the sound information emitted from the vehicular apparatus or the constituent parts thereof, and therefore, the symptom of the failure can be detected more accurately particularly with respect to the vehicular apparatus or the part in which the frequency of the sound emitted at the normal time and the frequency of the sound emitted at the abnormal time are determined to some extent, such as the bearing member provided at the transmission.
Further, in the vehicle diagnosis device of the present invention, the driving information may include at least one of an acceleration/deceleration rate or a frequency or number of acceleration/deceleration operations of the vehicle 10 and road surface information during the traveling, and the load state of at least one of the vehicle device and the component parts thereof may be estimated based on the at least one of the acceleration/deceleration rate or the frequency or number of acceleration/deceleration operations of the vehicle 10 and the road surface information.
According to the vehicle diagnosis device of the embodiment, the load state of the vehicle device or the component is evaluated by combining a plurality of events other than years in which a high load is applied to the vehicle device or the component, such as a sudden acceleration/deceleration operation of the vehicle or road surface information when the vehicle is traveling, and therefore, the symptom of a failure of the diagnosis target vehicle can be detected more accurately.
Further, in the vehicle diagnosis device of the present invention, at least one of the vehicle devices may be a transmission mounted on the vehicle 10.
According to the vehicle diagnostic device of the embodiment, regarding the transmission having a large degree of influence on the running of the vehicle, the risk of failure can be determined with high accuracy according to the load state thereof. Therefore, the safety of the diagnosis target vehicle can be ensured.
In the vehicle diagnosis system according to the present invention, the vehicle diagnosis device 20 may be communicably connected to an external information terminal 30, and the vehicle diagnosis device 20 may transmit the diagnosis information of the vehicle 10 to the external information terminal 30.
According to the vehicle diagnostic system of the embodiment, the diagnostic information that appropriately determines the risk of failure of the vehicle is supplied from the vehicle diagnostic device to the external information terminal, and therefore the diagnostic information is effectively used among various operators who have received the supply of the diagnostic information.
Further, in the vehicle diagnosis system of the present invention, the external information terminal 30 may be at least one of a user terminal, a manufacturer terminal, a repair shop terminal, a seller terminal, a rental shop terminal, and a rental shop terminal of the vehicle 10.
According to the vehicle diagnosis system of the embodiment, the diagnosis information generated by the vehicle diagnosis apparatus is provided to each information terminal held by the user, the manufacturer, the repair shop assistant, the sales shop assistant, the rental shop assistant, and the rental shop assistant of the vehicle, so that the provided diagnosis information is more effectively used.
Further, in the vehicle diagnosis system according to the present invention, the external information terminal 30 may be a rental shop terminal of the vehicle 10, the vehicle 10 may be a vehicle provided by a residual charge setting type credit service, and the rental shop terminal may determine whether or not the residual charge guarantee period of the vehicle 10 can be extended or the rating of the vehicle 10 at the time of completion of the residual charge setting type credit service based on the received diagnosis information of the vehicle 10.
According to the vehicle diagnosis system of the embodiment, the failure risk information of the vehicle appropriately determined by the vehicle diagnosis means is provided to the rental business proprietor, so the rental business proprietor can appropriately determine the extension of the guaranteed period of the residual price of the vehicle provided by the residual price setting type credit service, or the approval rating of the vehicle at the end of the residual price setting type credit service.
[ Effect of the invention ]
According to the present invention, it is possible to provide a vehicle diagnosis device and a vehicle diagnosis system that can highly accurately determine the risk of failure of a vehicle to be diagnosed by evaluating the load state of each vehicle device or component and diagnosing the vehicle by integrating the evaluation of each vehicle device or component.
Drawings
Fig. 1 is a diagram schematically showing the configuration of a vehicle diagnostic system according to the present embodiment.
Fig. 2 is a functional block diagram of the vehicle diagnostic device of the present embodiment.
Fig. 3 is a diagram showing an example of a vehicle evaluation method performed by the vehicle diagnostic device of the present embodiment.
Fig. 4 (a) and 4 (b) are diagrams showing transitions between an operation command value and an operation actual measurement value corresponding to a command signal for a transmission.
Fig. 5 is a diagram showing an example of a score chart for evaluating the load state of the transmission or its component parts.
Fig. 6 is a diagram showing an example of a vehicle evaluation method based on the load state of the transmission or its constituent parts.
Fig. 7 is a diagram showing an example of a score chart for evaluating a load state depending on abnormal noise of a transmission or its component parts.
Fig. 8 is a diagram showing an example of a vehicle evaluation method based on the load state of the transmission or its component parts, which depends on abnormal noise.
Fig. 9 is a diagram showing an example of a score table for evaluating the load state of a transmission or its component parts accompanying rapid deceleration or rapid acceleration of a vehicle.
Fig. 10 is a diagram showing an example of a vehicle evaluation method based on the load state of a transmission or its component parts accompanying rapid deceleration or rapid acceleration of a vehicle.
[ description of symbols ]
1: vehicle diagnostic system
10: vehicle with a steering wheel
11：ECU
12: details or arrangements of devices
20: vehicle diagnostic device
21: driving information acquisition component
22: load state evaluation unit
23: vehicle diagnostic information generating component
24: diagnostic information transmitting component
30: external information terminal
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in various different embodiments, and is not limited to the description of the embodiments described below.
A vehicle diagnostic system 1 according to an embodiment of the present invention will be described with reference to fig. 1 to 3. Fig. 1 is a diagram schematically showing the configuration of a vehicle diagnostic system 1 according to the present embodiment. Fig. 2 is a functional block diagram of the vehicle diagnostic device 20 included in the vehicle diagnostic system 1. Fig. 3 is a diagram showing an example of the evaluation method of the diagnosis target vehicle.
As shown in fig. 1, a vehicle diagnostic system 1 according to the present embodiment includes: the vehicle diagnostic apparatus 20 connected to the vehicle 10 to be diagnosed includes an external information terminal 30a, an external information terminal 30b, external information terminals 30c, and …, and an external information terminal 30n (hereinafter, simply referred to as "external information terminal 30"). The vehicle diagnosis device 20 and the external information terminal 30 are connected via a communication network 40.
The vehicle 10 includes an electronic control unit 11 (hereinafter, referred to as "ECU 11"). Here, an ECU11 as a controller for controlling a plurality of components or devices 12 constituting the vehicle 10, such as an engine, a transmission (transmission), a power steering device, and in-vehicle electrical components (e.g., a wiper, a direction indicator, and a tail lamp), is provided.
Each ECU11 includes: an arithmetic Unit (for example, a processor such as a Central Processing Unit (CPU)), a storage Unit (for example, a main Memory such as a Read Only Memory (ROM) or a Random Access Memory (RAM), a storage device such as a Hard Disk Drive (HDD) or a Solid State Drive (SSD)), and a communication interface Unit. The calculation unit of the ECU11 performs a predetermined calculation based on the program or data stored in the storage unit, based on various signals (for example, signals from various sensors for detecting the driving state of the vehicle 10 or other ECUs 11) input via the communication interface unit. Further, the arithmetic section outputs a control signal generated based on the arithmetic result to the corresponding component or device 12.
The storage unit of the ECU11 stores therein driving information including vehicle component operation information such as an input signal record from a sensor or the like, a control signal record for the component or the device 12, and a failure code of the component or the device 12, in addition to its own identification information, control program, and data. The vehicle diagnosis device 20 described later acquires these pieces of information that have been stored in the ECU11 after communicably connecting with the ECU 11.
The vehicle 10 of the present embodiment is a four-wheel vehicle including a gasoline engine, but may be another four-wheel vehicle such as an electric vehicle, a hybrid vehicle, a fuel cell vehicle, or a diesel engine vehicle. The vehicle 10 is not limited to a four-wheel vehicle, and may be a motorcycle or the like.
The sensor that detects the driving state of the vehicle 10 is also not particularly limited. Examples of the sensor include: a position sensor, a speed sensor, an angle sensor, an angular velocity sensor, a rotational speed sensor, a torque sensor, a temperature sensor, a pressure sensor, a current sensor, a voltage sensor, a concentration sensor, an exhaust gas sensor, a knock sensor, an image sensor, a distance sensor, and the like included in each component or device 12.
Then, the vehicle diagnostic device 20 includes: an arithmetic unit (for example, a processor such as a CPU), a storage unit (for example, a main memory such as a ROM or a RAM, a storage device such as an HDD or an SSD), a communication interface unit, and the like. The arithmetic unit of the vehicle diagnostic device 20 performs a predetermined arithmetic operation based on the program or data stored in the storage unit, based on various signals input via the communication interface unit. Further, the arithmetic unit outputs various signals generated based on the arithmetic result to, for example, the external information terminal 30 or the like.
The vehicle diagnostic device 20 of the present embodiment functions as, for example, the following components shown in fig. 2 by processing in the arithmetic unit using a program or data. In more detail, the vehicle diagnostic device 20 includes: a driving information acquisition means 21, a load state evaluation means 22 of each component or device 12, a vehicle diagnostic information generation means 23, a diagnostic information transmission means 24.
The driving information acquiring means 21 is a means for accessing the ECU11 included in the vehicle 10 to be diagnosed and acquiring the driving information of the vehicle including the vehicle component operation information detected while the vehicle is traveling. As described above, the ECU11 stores therein the driving information including the input signal records from sensors and the like (the actual operation measurement values of components such as the engine and the transmission and the device 12, and the like), and the control signal records for the components or the device 12 (the operation command values for the components or the device 12 and the like that have been transmitted from the ECU 11). The driving information acquisition means 21 acquires these pieces of information from the ECUs 11 in order to evaluate the load state of each component or device 12.
For more accurate evaluation, the driving information acquiring unit 21 may acquire driving information such as a failure code of the component or the device 12, and a running total time (distance) of the vehicle. Further, the driving information acquiring unit 21 may acquire image (video) information, sound information, map information, and the like that have been stored in an image sensor (camera), a drive recorder, a car navigation system, and the like mounted on the vehicle 10. The driving information may be acquired from a device other than the ECU11, for example, image (video) information, audio information, or the like acquired from a camera, a microphone, or the like of a portable terminal (a smartphone, a tablet terminal, or the like) held by the occupant of the vehicle 10.
Then, the load state evaluating means 22 (hereinafter, "load state evaluating means 22") of each part or apparatus 12 is a means that evaluates the load state of each part or apparatus 12 based on the driving information acquired by the driving information acquiring means 21. The load state evaluation unit 22 in the present embodiment scores the load state of each part or device 12 by a predetermined method (the scoring method will be described in the following examples).
After the load state of each component or device 12 is scored, the scoring results (scores) of a part or all of the vehicle component groups included in the vehicle 10 are summed up. Further, the load state evaluation means 22 refers to the storage unit of the vehicle diagnosis device 20, and evaluates the quality of the load state of the vehicle 10 to be diagnosed, based on the evaluation information specified by the predetermined score range.
Fig. 3 shows an example of a vehicle evaluation method performed by the vehicle diagnostic device. The total score of the results of scoring the respective parts or devices 12 of the vehicle 10a identified by the character string AAAA is 36 points. Here, 36 is included in the range of the evaluation a, and therefore the evaluation of the vehicle 10a is set to "a". On the other hand, the total score of the results of scoring each component or device 12 of the vehicle 10z identified by the character string ZZZZ is 32. Here, 32 points are included in the range of the evaluation B, and therefore the evaluation of the vehicle 10z is set to "B". According to the vehicle diagnosis device 20 of the present embodiment, the load state is scored for each component or device 12 mounted on the vehicle, and the state of the vehicle 10 is evaluated based on the total of the obtained scores, so that the risk of failure of the vehicle 10 can be determined with high accuracy.
In the present embodiment, the driving information acquiring means 21 and the load state evaluating means 22 are implemented by one device (the vehicle diagnosing device 20), but the driving information acquiring means 21 and the load state evaluating means 22 may be implemented by a plurality of devices. In this case, the plurality of devices will be collectively referred to as "vehicle diagnostic device 20".
Then, the vehicle diagnostic information generating means 23 is a means that generates diagnostic information of the vehicle 10 according to the load states of the evaluated parts or devices 12. The diagnostic information generated in the present embodiment includes scores indicating the load states of the respective parts or devices 12, a total score of the scores, and an evaluation, as shown in fig. 3. The information included in the diagnostic information is not limited to this, and may include other information useful for vehicle diagnosis.
Then, the diagnostic information transmitting unit 24 is a unit that transmits the generated diagnostic information to another terminal such as the external information terminal 30. The type of the external information terminal 30 is not particularly limited, and examples thereof include: a user terminal of a vehicle (a personal computer, a smartphone, a tablet terminal, etc., held by a user), a manufacturer terminal (a computer terminal held by a manufacturer of the vehicle, a parts manufacturer, etc.), a repairman terminal (a computer terminal held by a repairman of the vehicle), a seller terminal (a computer terminal held by a vehicle seller such as a dealer or a handcart seller), a rental dealer terminal (a computer terminal held by a rental dealer of the vehicle), and the like. In particular, when the diagnosis information is transmitted to the external information terminal 30 described below, the following operation can be performed by the dealer who has received the diagnosis information.
(1) Case where the diagnosis information is transmitted to the repair shop terminal or the seller terminal: the repair shop or the dealer of the vehicle can grasp the risk of failure of the diagnosis target vehicle 10 based on the received diagnosis information. This can prompt the owner of the vehicle 10 to perform maintenance on the vehicle 10. As a result, the life of the vehicle 10 can be increased.
(2) Case where the diagnostic information is sent to the rental business terminal: when the diagnosis target vehicle 10 is provided by the residual price setting type credit service, the rental business of the vehicle can accurately determine whether the residual price guarantee period of the vehicle can be extended or the rating of the vehicle 10 at the end of the residual price setting type credit service can be extended based on the received diagnosis information.
(3) Case where the diagnosis information is transmitted to the lessor terminal: the lessor of the vehicle can determine the priority of the lent vehicle based on the diagnostic information relating to each of the held vehicles 10. Specifically, the more highly evaluated vehicle 10 in the diagnostic information, the less risk of failure is considered to be, and the vehicle can be positioned as a prioritized lending vehicle. In this way, the vehicle with high safety is preferentially lent, and thus the safety of the rental service can be improved.
(4) Case where the diagnostic information is sent to the manufacturer's terminal: the frequency or content of the failure (symptom) of each part or device 12 can be grasped based on the received diagnostic information. As a result, the diagnostic information can be fed back to the next design and development.
[ examples ]
In the vehicle diagnostic system 1 (particularly, the vehicle diagnostic device 20) described above, specific embodiments are described below. However, the present invention is not limited to the following examples.
< example 1 >
Example 1 of the present invention will be described with reference to fig. 4 (a), 4 (b), and 5. Embodiment 1 is an example of evaluating a load state relating to a transmission (transmission) or a component thereof mounted on a vehicle as an example of a component or a device 12 mounted on a vehicle. Here, fig. 4 (a) and 4 (b) are diagrams showing transitions between a theoretical rotational speed (operation command value) and an actual rotational speed (operation measured value) corresponding to a case where a predetermined shift command signal is transmitted from the ECU11 to the transmission. Fig. 5 is a diagram showing an example of a scoring table for evaluating the load state of the transmission or its component parts in example 1.
First, as shown in fig. 4 (a), when a shift command signal is transmitted from the ECU11 to the transmission, the rotation speed is shifted. Here, when the operation actual measurement value of the output rotation speed is measured by the rotation speed sensor included in the vehicle 10 or the transmission, it is detected that a deviation occurs between the operation command value and the operation actual measurement value obtained at the time point a. Although the suspicion of failure is made at the time point a, no failure code has been generated yet. Thereafter, when the deviation continues even after a predetermined time (time B) has elapsed from the time a, the ECU11 determines that a failure has occurred in the transmission at the time B, and generates a failure code.
In contrast, as shown in fig. 4 (b), there are cases where: at time a, a discrepancy occurs between the operation command value and the operation actual measurement value of the output rotation speed, which leads to a suspected trouble, but after the discrepancy is slightly continued, the discrepancy is resolved at time B. In this case, the deviation is not generated at the time point B, and thus no fault code is finally generated.
Therefore, in the present embodiment, the failure symptom code is generated at the time point a at which the suspicion of failure is generated. The fault symptom code is a code generated due to suspicion of a fault at a point in time when a suspicion of a fault occurs, and is different from a conventional fault code generated due to determination of a fault.
In this case, the driving information acquiring means 21 of the vehicle diagnostic device 20 may be provided with a function of acquiring the operation command value and the operation actual measurement value of the rotational speed, which are already stored in the ECU11, and the load state estimating means 22 may be provided with a function of generating a fault sign code.
Further, the vehicle diagnosis device 20 evaluates the load state of the transmission based on the number of times of generation of the failure sign code (the number of times of suspected failure) in a predetermined period. The vehicle diagnosis device 20 of the present embodiment further refers to the running total time of the vehicle 10 to be diagnosed, and estimates the load state of the transmission based on the number of times of generation of the failure sign code and the running total time.
Specifically, as shown in fig. 5, the horizontal axis of the graph is the travel accumulated time, the vertical axis is the number of times of generation of the failure sign code, and the position in the graph corresponding to the actual detection value is referred to. Here, when the position in the graph obtained from the detection value is plotted in the area 51 in the graph of fig. 5, the score is 3. When the position in the graph obtained from the detection values is plotted in the area 52 in the graph of fig. 5, the score is 2. Further, when the position in the graph obtained from the detection value is plotted in the area 53 in the graph of fig. 5, the score is 1. Further, when the position in the graph obtained from the detection value is plotted in the area 54 in the graph of fig. 5, the score is 0. In the case of the present embodiment, the lower the score, the higher the risk of failure. According to the present embodiment of this aspect, it is possible to accurately detect the sign of failure in a case where the ECU11 is not evaluated as a failure (a case where a conventional failure code is not generated).
Fig. 6 is a table showing an example of vehicle evaluation based on the load states of the transmission or its constituent parts evaluated by the evaluation method of fig. 5. As shown in the table of this figure, the scores regarding the transmission or its constituent parts are summed up for each vehicle, thereby giving a comprehensive evaluation of the vehicle (A, B …).
< example 2 >
Next, embodiment 2 of the present invention will be explained. Embodiment 2 is an example of evaluating a load state depending on abnormal noise as a component or a transmission of the apparatus 12. Here, fig. 7 is a diagram showing an example of a score chart for evaluating the load state of the transmission in example 2.
Generally, a transmission is provided with a ball bearing that supports a rotating shaft and a rotating component such as a gear or a pulley. When the transmission is operated, the balls of the ball bearings slide and rotate with the rotation of the rotating parts, and the sliding sound from the balls has a specific frequency according to the number of abnormal balls. Therefore, the vehicle diagnosis device 20 in the present embodiment detects the presence or absence of a sound of a specific frequency corresponding to an abnormality, for example, from sound information received from a vehicle-mounted drive recorder or a smartphone of a passenger, and evaluates the load state of the transmission based on the detected number of times of occurrence of an abnormal sound.
In this case, the driving information acquiring unit 21 of the vehicle diagnosis device 20 may be provided with a function of acquiring sound information from a drive recorder or a smartphone, and the load state estimating unit 22 may be provided with a function of counting the number of times of abnormal sound generation. Further, the vehicle diagnosis device 20 of the present embodiment refers to the occurrence time of the abnormal sound, and estimates the load state of the transmission based on the number of occurrences of the abnormal sound and the occurrence time.
Specifically, as shown in fig. 7, the horizontal axis of the graph is the abnormal sound occurrence time, and the vertical axis is the abnormal sound occurrence frequency, and the position in the graph corresponding to the actual detection value is referred to. Here, when the position in the graph obtained from the detection value is plotted in the area 61 in the graph of fig. 7, the score is 3. When the position in the graph obtained from the detection values is plotted in the area 62 in the graph of fig. 7, the score is 2. Further, when the position in the graph obtained from the detection value is plotted in the area 63 in the graph of fig. 7, the score is 1. Further, when the positions in the graph obtained from the detection values are plotted in the region 64 and the region 65 in the graph of fig. 7, the score is 0. In the case of the present embodiment, the lower the score, the higher the risk of failure. According to the present embodiment of this aspect, the vehicle component including the member in which the sound frequency emitted at the time of the normal operation and the sound frequency emitted at the time of the abnormal operation are determined to some extent can accurately detect the sign of the failure.
Fig. 8 is a table showing an example of evaluation of the load state depending on the abnormal sound of the transmission or its constituent parts (ball bearings or other parts) evaluated by the evaluation method of fig. 7. As shown in the table of the figure, the scores for the ball bearings of the transmission or other constituent parts are summed up for each vehicle, thereby giving a comprehensive evaluation of the vehicle (A, B …).
< example 3 >
Next, embodiment 3 of the present invention will be explained. Embodiment 3 is an example of evaluating the load state relating to the transmission or its constituent parts accompanying sudden deceleration or sudden acceleration of the vehicle. Here, fig. 9 is a diagram showing an example of a scoring table for evaluating the load state of a transmission or its component parts associated with sudden deceleration or sudden acceleration of the vehicle in embodiment 3.
The vehicle diagnosis device 20 in the present embodiment estimates the load state of the transmission based on the acceleration/deceleration value of the vehicle calculated based on the detection information from the angular velocity sensor, the rotational speed sensor, and the like of the wheels and the road surface information (specifically, the friction coefficient μ of the road surface calculated based on the road surface information) when the vehicle is traveling based on the image information recorded by the image sensor or the vehicle-mounted drive recorder. In addition, although the present embodiment refers to the acceleration value of the vehicle, the frequency or the number of times of acceleration and deceleration may be referred to in addition to (or instead of) the acceleration value.
In this case, the load state estimating unit 22 may be configured to estimate the friction coefficient μ of the road surface as long as the driving information acquiring unit 21 of the vehicle diagnostic device 20 is provided with the function of acquiring the acceleration/deceleration value of the vehicle stored in the ECU11 or the image information of the road surface stored in the image sensor, the drive recorder, or the like.
Specifically, as shown in fig. 9, the horizontal axis of the graph is the acceleration/deceleration (the positive side of the horizontal axis is the acceleration, and the negative side is the deceleration), and the vertical axis is the friction coefficient μ of the road surface, and the position in the graph corresponding to the actual detection value is referred to. Here, when the positions in the graph obtained from the detection values are plotted in the regions 71a and 71b in the graph of fig. 9, the score is 3. When the positions in the graph obtained from the detection values are plotted in the regions 72a and 72b in the graph of fig. 9, the score is 2. When the positions in the graph obtained from the detection values are plotted in the regions 73a and 73b in the graph of fig. 9, the score is 1. When the positions in the graph obtained from the detection values are plotted in the regions 74a and 74b in the graph of fig. 9, the score is 0. In the case of the present embodiment, the lower the score, the higher the risk of failure.
Fig. 10 is a table showing an example of evaluation of the load states of the transmission and its constituent parts associated with rapid deceleration or rapid acceleration of the vehicle, which is evaluated by the evaluation method of fig. 9. As shown in the table of this figure, the scores regarding the transmission or its constituent parts are summed up for each vehicle, thereby giving a comprehensive evaluation of the vehicle (A, B …).
According to the present embodiment of this form, the load state of the component or device 12 is evaluated by combining a plurality of events in which a higher load is applied to the component or device 12, such as a sudden acceleration/deceleration operation of the vehicle 10 or road surface information during vehicle running. Therefore, the sign of failure of the diagnosis target vehicle can be detected with higher accuracy.
Although embodiments 1 to 3 each evaluate the load state of the transmission or the constituent parts thereof, according to the present invention, other parts or devices mounted on the vehicle can be evaluated by the same method. In addition, as shown in examples 1 to 3, the load state can be evaluated from a plurality of points of view with respect to the same parts or devices. For example, the evaluations in examples 1 to 3 may be individually applied, but the load state of the part or the device may be more appropriately evaluated by an appropriate combination. In this case, the score of the component or the device may be obtained by adding only the scores obtained in the respective evaluation forms, or may be obtained by taking the average of the scores obtained in the respective evaluation forms or the weighted average using a predetermined weighting coefficient.
Claims (8)
1. A vehicle diagnostic apparatus characterized in that,
drive information of a vehicle including information on the operation of a vehicular device or its constituent parts detected while the vehicle is running is acquired,
estimating a load state of each of the vehicular devices or its constituent parts based on the acquired driving information,
generating diagnostic information of the vehicle based on the load status of each of the vehicle devices or its constituent parts evaluated.
2. The vehicle diagnostic apparatus according to claim 1,
the driving information includes the number of times of generation of a failure sign code generated when an operation command value transmitted from an electronic control device of the vehicle to the vehicle device deviates from an actual measured value of the operation of the vehicle device by a predetermined time,
evaluating a load status of at least one of the vehicular apparatus or its constituent parts based on the number of times of generation of the fault symptom code.
3. The vehicle diagnostic apparatus of an electric vehicle according to claim 1,
the driving information includes the number of times of generation of abnormal sounds extracted from sound information emitted from the vehicular apparatus or its constituent parts,
evaluating a load state of at least one of the vehicular apparatus or its constituent parts based on the number of times of abnormal sound generation.
4. The vehicle diagnostic apparatus according to claim 1,
the driving information includes at least one of acceleration/deceleration of the vehicle, or frequency or number of acceleration/deceleration operations, and road surface information during the traveling,
the load state of at least one of the vehicle device and the component parts thereof is evaluated based on the acceleration/deceleration of the vehicle, or at least one of the frequency and the number of times of the acceleration/deceleration operation, and the road surface information.
5. The vehicle diagnostic apparatus according to claim 1,
at least one of the vehicle devices is a transmission mounted on the vehicle.
6. A vehicle diagnostic system characterized by,
communicatively connecting the vehicle diagnostic device according to any one of claims 1 to 5 with an external information terminal,
the vehicle diagnosis device transmits the diagnosis information of the vehicle to the external information terminal.
7. The vehicle diagnostic system of claim 6,
the external information terminal is at least one of a user terminal, a manufacturer terminal, a repair shop terminal, a seller terminal, a rental shop terminal, and a rental shop terminal of the vehicle.
8. The vehicle diagnostic system of claim 6,
the external information terminal is a rental business terminal of the vehicle,
the vehicle is a vehicle provided by a residual rate setting type credit service,
the rental business terminal determines whether the remaining price guarantee period of the vehicle can be extended or the rating of the vehicle at the time of ending the remaining price setting type credit service based on the received diagnosis information of the vehicle.
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| JP2020056739A JP2021156715A (en) | 2020-03-26 | 2020-03-26 | Vehicle diagnosis device and vehicle diagnosis system |
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| CN116609092A (en) * | 2023-07-20 | 2023-08-18 | 北京阿帕科蓝科技有限公司 | Fault detection method, device, computer equipment and storage medium |
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| JP2021156715A (en) | 2021-10-07 |
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