CN114112402A

CN114112402A - Fault identification method and device for vehicle transmission and vehicle

Info

Publication number: CN114112402A
Application number: CN202111423606.2A
Authority: CN
Inventors: 范少康; 耿亚雷
Original assignee: Honeycomb Transmission Technology Hebei Co Ltd
Current assignee: Honeycomb Transmission Technology Hebei Co Ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-03-01

Abstract

The invention relates to a fault identification method and a fault identification device for a vehicle transmission and a vehicle, wherein the transmission is integrated with an automatic Transmission Control Unit (TCU), and the method comprises the following steps: when a transmission fault is detected, TCU data at the fault occurrence moment are collected; the method comprises the steps of obtaining first TCU related data with a first preset time length before a fault occurrence time, and obtaining second TCU related data with a second preset time length after the fault occurrence time; and carrying out fault recurrence test on the TCU by utilizing the TCU data, the first TCU related data and the second TCU related data, and identifying the fault reason of the TCU and/or generating a fault report of the TCU by the fault recurrence data. The method solves the problem that the cause can be further detected and confirmed only by disassembling the transmission during troubleshooting and analysis, thereby greatly increasing the troubleshooting cost, being beneficial to rapidly analyzing the accidental faults, and reducing the analysis processes of fault recurrence, offline disassembly detection and the like.

Description

Fault identification method and device for vehicle transmission and vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to a fault identification method and device for a vehicle transmission and a vehicle.

Background

The 9AT automatic gearbox consists of a hydraulic torque converter, a planetary gear set and a hydraulic control system, and achieves speed and torque changing through a hydraulic transmission and gear combination mode. The electronic control system realizes 9 forward gears and 1 reverse gear by controlling 4 groups of clutches and 2 brakes.

In the related art, a 9AT automatic Transmission generally adopts a built-in integrated TCU (Transmission Control Unit), an electric Control system controls an electromagnetic valve and 6 sensors through four-way output drive, 11 hydraulic systems to complete the operation of an actuating mechanism of the whole Transmission, and the TCU, the hydraulic Control valves and the sensors are integrated and are arranged inside the Transmission, so that the simplification is realized on the whole structure, and the weight and the volume of the Transmission are reduced.

However, the transmission is a built-in integrated structure, and cannot directly detect the electric control system, and during later troubleshooting and analysis, the transmission is often disassembled to further detect and confirm the cause, so that the troubleshooting cost is greatly increased, and a solution is urgently needed.

Disclosure of Invention

In view of the above, the present invention is directed to a method for identifying a failure of a vehicle transmission, which solves the problems that in the related art, an electronic control system cannot be directly detected, and during later troubleshooting and analysis, the transmission often needs to be disassembled to further detect and confirm a cause, which greatly increases troubleshooting cost, and is beneficial to rapidly analyzing accidental failures, and reducing the failure recurrence, offline disassembly and detection and other problems.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a method of fault identification of a vehicle transmission, the transmission being integrally provided with an automatic transmission control unit, TCU, wherein the method comprises the steps of:

when a transmission fault is detected, TCU data at the fault occurrence moment are collected;

acquiring first TCU related data with a first preset time length before the fault occurrence time, and acquiring second TCU related data with a second preset time length after the fault occurrence time;

and carrying out fault online test on the TCU by utilizing the TCU data, the first TCU related data and the second TCU related data, and identifying a fault reason of the TCU and/or generating a fault report of the TCU by fault recurrence data.

Further, before the failure of the transmission is detected, the method comprises:

receiving a fault trigger sent by the transmission trigger fault condition;

judging whether the fault trigger mark meets a TCU fault condition or not;

if the TCU fault condition is satisfied, determining that the transmission is faulty.

Further, the collecting the TCU data at the time of the fault includes:

acquiring the TCU data from a fault data cache module;

and storing the data identifier of the TCU data to be frozen into a round-robin buffer area according to the preset continuous freezing data length.

Further, the acquiring, while acquiring the first TCU related data with a first preset duration before the fault occurrence time, the second TCU related data with a second preset duration after the fault occurrence time includes:

reading the TCU data to be frozen by using a UDS service;

and analyzing the freezing frame corresponding to the TCU data to be frozen to obtain the first TCU related data and the second TCU related data.

Further, the analyzing the frozen frame corresponding to the TCU data to be frozen to obtain the first TCU related data and the second TCU related data includes:

converting the hexadecimal TCU data into a physical value or an ASCII code value;

and acquiring transmission parameters in the first time period and transmission processing data in the second preset time period according to the physical values.

Compared with the prior art, the fault identification method of the vehicle transmission has the following advantages:

the fault identification method of the vehicle transmission can acquire TCU data at the fault occurrence time when the transmission is detected to have a fault, acquire first TCU related data with a first preset time length before the fault occurrence time, acquire second TCU related data with a second preset time length after the fault occurrence time, perform fault recurrence online test on the TCU by using the TCU data, the first TCU related data and the second TCU related data, and identify the fault reason of the TCU and/or generate a fault report of the TCU by the fault recurrence data. Therefore, the problem that the real cause can be further detected and confirmed by disassembling the transmission when the electronic control system cannot be directly detected and later troubleshooting and analysis are performed in the related technology is solved, the troubleshooting cost is greatly increased, the accidental faults can be rapidly analyzed, and the analysis processes of the problems of fault recurrence, offline disassembling and detection and the like are reduced.

The invention also aims to provide a fault recognition device for a vehicle transmission, which solves the problems that an electric control system cannot be directly detected in the related technology, the real cause can be further detected and confirmed by disassembling the transmission when the later fault is checked and analyzed, and the fault checking cost is greatly increased, is favorable for quickly analyzing accidental faults, and reduces the analysis processes of the problems of fault recurrence, offline disassembly and detection and the like

a malfunction recognition apparatus of a vehicle transmission integrally provided with an automatic transmission control unit TCU, wherein the apparatus comprises:

the acquisition module is used for acquiring TCU data at the moment of failure when the transmission is detected to be failed;

the acquisition module is used for acquiring first TCU related data with a first preset time length before the fault occurrence time and acquiring second TCU related data with a second preset time length after the fault occurrence time;

and the identification module is used for carrying out fault online test on the TCU by utilizing the TCU data, the first TCU related data and the second TCU related data, and identifying a fault reason of the TCU and/or generating a fault report of the TCU by fault recurrence data.

Further, before the transmission is detected to be faulty, the acquisition module is specifically configured to:

receiving a fault trigger sent by the transmission trigger fault condition;

judging whether the fault trigger mark meets a TCU fault condition or not;

Further, the acquisition module is specifically configured to:

acquiring the TCU data from a fault data cache module;

Further, the obtaining module is specifically configured to:

reading the TCU data to be frozen by using a UDS service;

Further, the obtaining module is further configured to:

converting the hexadecimal TCU data into physical values or ASCII codes;

The fault identification device of the vehicle transmission and the fault identification method of the vehicle transmission have the same advantages compared with the prior art, and are not repeated herein.

Another object of the present invention is to provide a vehicle, which solves the problems that the electronic control system cannot be directly detected in the related art, and the transmission needs to be disassembled to further detect and confirm the cause during the later troubleshooting and analysis, thereby greatly increasing the troubleshooting cost, facilitating the rapid analysis of the accidental failure, and reducing the failure recurrence, offline disassembly detection and other problem analysis processes.

a vehicle is provided with the failure recognition device of the vehicle transmission according to the above embodiment.

Compared with the prior art, the vehicle and the fault identification device of the vehicle transmission have the same advantages, and the detailed description is omitted.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a flow chart of a method of fault identification of a vehicle transmission in accordance with an embodiment of the present invention;

FIG. 2 is a schematic flow chart illustrating the fault handling of a fault identification system for a vehicle transmission according to one embodiment of the present invention;

FIG. 3 is a diagram illustrating a rotation cache according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating the conversion of fault data to physical values according to one embodiment of the present invention;

FIG. 5 is a schematic diagram of reading of faulty freeze frame data according to one embodiment of the present invention;

FIG. 6 is a diagram illustrating the conversion of data into physical values according to one embodiment of the present invention;

FIG. 7 is a flow diagram of a failed cache data freeze, according to one embodiment of the present invention;

fig. 8 is a block diagram schematically illustrating a failure recognition apparatus of a vehicle transmission according to an embodiment of the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Fig. 1 is a flowchart of a fault identification method of a vehicle transmission according to an embodiment of the invention. In this embodiment the transmission is integrated with an automatic gearbox control unit TCU.

As shown in fig. 1, a failure recognition method of a vehicle transmission according to an embodiment of the present invention includes the steps of:

and S101, when the transmission is detected to have a fault, acquiring TCU data at the moment of the fault.

In this embodiment, as shown in fig. 2, a fault identification system of a vehicle transmission according to a fault identification method of a vehicle transmission according to an embodiment of the present invention may include: the system comprises a fault diagnosis module, a fault management module, a fault data caching module, a fault data freezing storage module, a fault freezing frame data module and a freezing frame data analysis module. The embodiment of the invention can periodically (calibratable) detect whether the transmission has a fault through the fault diagnosis module, and when the transmission is detected to have the fault, the TCU data at the moment of the fault is acquired.

As a possible implementation manner, in some embodiments, collecting TCU data at the time of occurrence of a fault includes: acquiring TCU data from a fault data cache module; and storing the data identifier of the TCU data to be frozen into the round-robin buffer area according to the preset continuous freezing data length.

The preset continuous freezing data length may be a data length preset by a user, may be a data length obtained through a limited number of experiments, or may be a data length obtained through a limited number of computer simulations, which is not specifically limited herein.

It should be understood that the fault Data caching module periodically (calibratable) stores fault-related Data, so that when TCU Data at the time of fault occurrence is collected, the embodiment of the present invention may obtain the TCU Data from the fault Data caching module, and store the fault Data in a round-robin caching manner according to the DID (Data Identifiers) of the TCU Data to be frozen and the preset continuous frozen Data length.

As shown in fig. 3, the rotation cache area may be configured such that DID number 0 is a data identifier of the first failed cache data, DID number 1 is a data identifier of the second failed cache data, DID number 2 is a data identifier of the third failed cache data, … …, and DID number Dmax-1 are data identifiers of the Dmax-th failed cache data, Dmax is a maximum value of the data identifiers of the failed cache data, for example, the data identifier DID number 0 of the first failed cache data is 1234, the data identifier DID number 1 of the second failed cache data is 1243, the data identifier DID number 3 of the third failed cache data is 1324, … …, and the data identifier DID number 19 of the twentieth failed cache data is 4132; kmax is a preset continuous freeze data length.

Further, in some embodiments, before detecting the transmission failure, comprising: receiving a fault trigger sent by a transmission trigger fault condition; judging whether the fault trigger mark meets a TCU fault condition or not; if the TCU fault condition is satisfied, a transmission fault is determined.

It should be understood that, in the embodiment of the present invention, whether the transmission fails or not may be periodically (calibratable) detected by the fault diagnosis module, when the transmission triggers a fault condition, the fault trigger may be sent, after the fault management module receives the fault trigger, the fault management module may enter a fault processing stage, and after a calibrated debounce time, if the fault condition is still met, it is determined that the fault trigger meets the TCU fault condition, and it is determined that the transmission fails. Therefore, the accuracy of judging the fault of the transmission is effectively improved by setting whether the fault trigger mark meets the fault condition of the TCU, and the occurrence of misjudgment is avoided.

It should be noted that the fault cache data may first calibrate corresponding cache data DID according to different faults, and set a sampling period of each signal according to the precision and characteristics of the data signal, as shown in fig. 4, for example, the calibratable sampling period with the precision and characteristics of the data signal being 0 may be 20ms, the calibratable sampling period with the precision and characteristics of the data signal being 3 may be 100ms, the calibratable sampling period with the precision and characteristics of the data signal being 6 may be 40ms, and the like, and the fault data updates the cache data in a cyclic rotation manner according to the calibratable sampling period without specific limitation here. And after the fault occurs, triggering the flag bit to freeze data according to the data to be frozen, and defining the data freezing time by the flag bit triggered by the data to be frozen through a calibration value.

Step S102, while acquiring first TCU related data with a first preset duration before the fault occurrence time, acquiring second TCU related data with a second preset duration after the fault occurrence time.

Further, in some embodiments, acquiring the first TCU related data with a first preset duration before the fault occurrence time, and acquiring the second TCU related data with a second preset duration after the fault occurrence time includes: reading TCU data to be frozen by using a UDS service; and analyzing the freezing frame corresponding to the TCU data to be frozen to obtain first TCU related data and second TCU related data.

Further, in some embodiments, parsing the frozen frame corresponding to the TCU data to be frozen to obtain the first TCU related data and the second TCU related data includes: converting the hexadecimal TCU data into a physical value or an ASCII code value; and acquiring transmission parameters in a first time period and transmission processing data in a second preset time period according to the physical values.

The first preset duration and the second preset duration may be durations preset by a user, durations obtained through limited experiments, or durations obtained through limited computer simulation, and are not specifically limited herein.

It should be understood that the fault data freezing storage module may be configured to store fault cache data, and when it is detected that a new fault enters into a fault memory, store the fault cache data into an EEP (Electrically Erasable and Programmable) memory, that is, a fault freeze frame data module, and read fault freeze frame data (i.e., TCU data to be frozen) through a UDS service (Unified Diagnostic service) by using a Diagnostic device, where the read result may be as shown in fig. 5.

Further, as shown in fig. 6, in the embodiment of the present invention, the hexadecimal TCU data is converted into the physical value or the ASCII code value through data analysis, so that the actual value of the relevant parameter 2s (i.e., the first preset time duration) before the occurrence of the fault and the fault post-processing after the occurrence of the fault can be obtained, which is equivalent to the data acquired through the fault on-line detection, and the cause of the problem can be analyzed conveniently, quickly, and accurately.

And S103, carrying out fault recurrence test on the TCU by using the TCU data, the first TCU related data and the second TCU related data, and identifying the fault reason of the TCU and/or generating a fault report of the TCU by the fault recurrence data.

That is to say, the embodiment of the present invention can record and store the relevant diagnostic data (i.e., TCU data) at the time of the occurrence of the fault, and implement the fault reproduction test function by adopting a mode in which the relevant data (i.e., the first TCU relevant data and the second TCU relevant data) is continuously collected within a certain time before and after the occurrence of the fault, and display the cause, state, electrical element characteristics and diagnostic logic of the fault trigger in a linear data manner, thereby truly and effectively analyzing the problem, locking the fault cause, saving the problem troubleshooting cost, and providing a fast and efficient after-sales service.

Therefore, the process and the state change triggered by the fault are visually and accurately displayed through continuous frame data analysis before and after the fault occurs, which is equal to the fault on-line recurrence data

In order to further understand the method for identifying a fault in a vehicle transmission according to an embodiment of the present invention, a fault buffer data freezing process will be described in detail with reference to fig. 2 and 7.

As shown in fig. 7, the failed cache data freeze includes the following steps:

and S701, starting.

S702, judging whether the power-on diagnosis condition of the TCU is met, if so, executing the step S704, otherwise, executing the step S703.

The power supply range is required to be ensured when the TCU is powered on, the diagnosis condition can be understood as a fault starting diagnosis condition, and the fault triggering condition is a corresponding condition to be set when different faults are diagnosed.

While step S704 is executed, the round-robin buffer area of the faulty data buffer module periodically buffers the calibrated frozen frame data, and skips to execute step S710.

S703, waiting for the diagnosis condition to be satisfied, and skipping to execute the step S701.

S704, the fault diagnosis module periodically diagnoses the fault state, and when the fault trigger condition is satisfied, executes step S705.

S705, receiving the fault trigger, confirming the fault of the fault management module, and judging whether the fault trigger meets the TCU fault condition, if so, executing step S707, otherwise, executing step S706.

S706, if the failure is not established, the step S704 is executed by jumping.

S707, storing EEP fault in memory

And S708, the fault data freezing storage module is used for freezing and storing the fault data.

Before the fault data freezing storage module freezes and stores the fault data, the calibration quantity of the cache data freezing moment is required to be met, the cache data freezing zone bit is established, then the fault data is obtained from the freezing frame data periodically cached and calibrated in the rotating cache area of the fault data cache module, and the fault data is stored

And S709, ending.

According to the fault identification method of the vehicle transmission, provided by the embodiment of the invention, when the transmission is detected to have a fault, TCU data at the fault occurrence time are acquired, first TCU related data with a first preset time length before the fault occurrence time are acquired, second TCU related data with a second preset time length after the fault occurrence time are acquired, the TCU data, the first TCU related data and the second TCU related data are used for carrying out fault recurrence test on the TCU, and the fault reason of the TCU is identified and/or a fault report of the TCU is generated through the fault recurrence data. Therefore, the problem that the real cause can be further detected and confirmed by disassembling the transmission when the electronic control system cannot be directly detected and later troubleshooting and analysis are performed in the related technology is solved, the troubleshooting cost is greatly increased, the accidental faults can be rapidly analyzed, and the analysis processes of the problems of fault recurrence, offline disassembling and detection and the like are reduced.

Further, as shown in fig. 8, an embodiment of the present invention also discloses a malfunction recognition apparatus 10 for a vehicle transmission, the transmission being integrally provided with an automatic transmission control unit TCU, the malfunction recognition apparatus 10 for a vehicle transmission comprising: acquisition module 100, acquisition module 200, and identification module 300.

The acquisition module 100 is configured to acquire TCU data at a fault occurrence time when detecting that a transmission has a fault;

the obtaining module 200 is configured to obtain first TCU related data with a first preset duration before a fault occurrence time, and obtain second TCU related data with a second preset duration after the fault occurrence time;

the identification module 300 is configured to perform online fault testing on the TCU using the TCU data, the first TCU-related data, and the second TCU-related data, and identify a fault cause of the TCU and/or generate a fault report of the TCU from the fault recurrence data.

Further, before detecting that the transmission is faulty, the acquisition module 100 is specifically configured to:

receiving a fault trigger sent by a transmission trigger fault condition;

judging whether the fault trigger mark meets a TCU fault condition or not;

if the TCU fault condition is satisfied, a transmission fault is determined.

Further, the acquisition module 100 is specifically configured to:

acquiring TCU data from a fault data cache module;

and storing the data identifier of the TCU data to be frozen into the round-robin buffer area according to the preset continuous freezing data length.

Further, the obtaining module 200 is specifically configured to:

reading TCU data to be frozen by using a UDS service;

and analyzing the freezing frame corresponding to the TCU data to be frozen to obtain first TCU related data and second TCU related data.

Further, the obtaining module 200 is further configured to:

converting the hexadecimal TCU data into a physical value;

and acquiring transmission parameters in a first time period and transmission processing data in a second preset time period according to the physical values.

It should be noted that the specific implementation manner of the fault identification device of the vehicle transmission according to the embodiment of the present invention is similar to the specific implementation manner of the fault identification method of the vehicle transmission, and in order to reduce redundancy, details are not described here.

According to the fault recognition device of the vehicle transmission, when the transmission is detected to be in fault, TCU data at the fault occurrence time are collected, first TCU related data with a first preset time length before the fault occurrence time are obtained, second TCU related data with a second preset time length after the fault occurrence time are obtained, fault recurrence testing is conducted on the TCU through the TCU data, the first TCU related data and the second TCU related data, and the fault recurrence data are used for recognizing the fault reason of the TCU and/or generating a fault report of the TCU. Therefore, the problem that the real cause can be further detected and confirmed by disassembling the transmission when the electronic control system cannot be directly detected and later troubleshooting and analysis are performed in the related technology is solved, the troubleshooting cost is greatly increased, the accidental faults can be rapidly analyzed, and the analysis processes of the problems of fault recurrence, offline disassembling and detection and the like are reduced.

Further, an embodiment of the invention discloses a vehicle provided with the failure recognition device of the vehicle transmission of the above-described embodiment. The vehicle is provided with the device, so that the problem that the electronic control system cannot be directly detected in the related technology is solved, the real cause can be further detected and confirmed by disassembling the transmission during later troubleshooting and analysis, the troubleshooting cost is greatly increased, the vehicle is favorable for rapidly analyzing accidental faults, and the analysis processes of the problems such as fault recurrence, offline disassembly detection and the like are reduced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A method for fault identification of a vehicle transmission, characterized in that the transmission is integrated with an automatic transmission control unit TCU, wherein the method comprises the steps of:

2. The method of claim 1, prior to detecting the transmission failure, comprising:

receiving a fault trigger sent by the transmission trigger fault condition;

judging whether the fault trigger mark meets a TCU fault condition or not;

3. The method of claim 1, wherein collecting TCU data at a time of failure comprises:

acquiring the TCU data from a fault data cache module;

4. The method according to claim 3, wherein the obtaining of the first TCU-related data with a first preset duration before the fault occurrence time and the second TCU-related data with a second preset duration after the fault occurrence time comprises:

reading the TCU data to be frozen by using a UDS service;

5. The method according to claim 4, wherein the parsing the first TCU-related data and the second TCU-related data based on the freeze frame corresponding to the TCU data to be frozen comprises:

6. A failure recognition device of a vehicle transmission, characterized in that the transmission is integrally provided with an automatic Transmission Control Unit (TCU), wherein the device comprises:

7. The device according to claim 6, characterized in that, before detecting the transmission failure, the acquisition module is particularly adapted to:

receiving a fault trigger sent by the transmission trigger fault condition;

judging whether the fault trigger mark meets a TCU fault condition or not;

8. The device according to claim 6, wherein the acquisition module is specifically configured to:

acquiring the TCU data from a fault data cache module;

9. The apparatus of claim 6, wherein the obtaining module is specifically configured to:

reading the TCU data to be frozen by using a UDS service;

10. A vehicle, characterized by comprising: a failure recognition apparatus of a vehicle transmission as claimed in any one of claims 6 to 9.