CN112611578A - Function test method and system for vehicle diagnosis and diagnosis equipment - Google Patents
Function test method and system for vehicle diagnosis and diagnosis equipment Download PDFInfo
- Publication number
- CN112611578A CN112611578A CN202011534366.9A CN202011534366A CN112611578A CN 112611578 A CN112611578 A CN 112611578A CN 202011534366 A CN202011534366 A CN 202011534366A CN 112611578 A CN112611578 A CN 112611578A
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- Prior art keywords
- vehicle
- condition
- function test
- instruction
- ecu
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 23
- 238000010998 test method Methods 0.000 title abstract description 4
- 238000012360 testing method Methods 0.000 claims abstract description 33
- 238000012986 modification Methods 0.000 claims abstract description 18
- 230000004048 modification Effects 0.000 claims abstract description 18
- 230000006870 function Effects 0.000 claims description 28
- 238000011990 functional testing Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 8
- 230000008929 regeneration Effects 0.000 description 10
- 238000011069 regeneration method Methods 0.000 description 10
- 239000004071 soot Substances 0.000 description 8
- 239000000110 cooling liquid Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
Abstract
The invention provides a function test method, a system and a diagnostic device for vehicle diagnosis, which are characterized in that when the function test is carried out, a corresponding modification instruction is sent to a vehicle ECU firstly, so that the vehicle ECU can not be bound by a limiting condition any more by detecting the limiting condition corresponding to the current function test and then sending the function test instruction, thereby bringing convenience for the function test and improving the diagnostic efficiency.
Description
Technical Field
The invention belongs to the technical field of vehicle diagnosis, and particularly relates to a function test method and system for vehicle diagnosis and diagnosis equipment.
Background
In the automobile diagnosis, when the fault is not obvious, a functional test is required to compare and analyze, and generally, which part of a line, a control unit and an actuator has the fault can be compared and analyzed. For example: under the condition that the vehicle is not on fire, the working condition of the oil nozzle can be tested, and whether the oil nozzle works normally or not is judged by hearing the sound. The functional test needs to use the diagnostic apparatus to connect the vehicle, and then uses the diagnostic apparatus to output signals to an automobile control unit (ECU), and the ECU controls a corresponding actuator to perform the test.
However, when the diagnostic device communicates with the ECU for function testing, the diagnostic device is often limited by some limiting conditions so that the test cannot be started directly, which brings great inconvenience to the test.
Automobile DPF (Diesel particulate trap), it is the device that is arranged in filtering the solid particle (mainly for the soot) in the engine exhaust, and after air current and soot entering DPF, because the export is stifled, the air current flows from the inner wall to holding back soot inside DPF, playing the effect of collecting the soot, purification efficiency is up to more than 85%, plays the purpose that reduces PM and discharges. When the engine is in a normal operation mode, the DPF filters and collects the particulates in the exhaust gas, and after the soot in the DPF reaches a certain amount or meets some other condition (e.g., vehicle mileage, coolant temperature), the ECU is required to control the exhaust temperature of the engine to burn off the accumulated soot in the DPF so that the DPF can continuously collect the particulates in the exhaust gas.
When the DPF function test is carried out, a DPF forced regeneration command needs to be sent to the vehicle ECU, but the vehicle ECU executes the forced regeneration command only when one of the following limiting conditions is met:
1. the ECU monitors that the trapped soot parameters within the DPF have exceeded a limit that triggers regeneration or that the mileage reaches a regeneration limit.
2. The temperature (water temperature) parameter of the cooling liquid is more than 80 ℃.
3. The T4(DOC upstream temperature) temperature parameter was 230-350 ℃.
The forced regeneration command may be negatively responded to by the vehicle ECU when the ECU detects that the corresponding parameter is out of condition.
Disclosure of Invention
In view of the above, a functional test method, a system and a diagnostic device for vehicle diagnosis are provided.
In order to solve the technical problems, the invention adopts the following technical scheme:
in one aspect, a functional test method for vehicle diagnosis is provided, including:
sending a modification instruction corresponding to the current function test to a vehicle ECU (electronic control Unit), so that the vehicle ECU passes the detection of the limiting condition corresponding to the current function test;
and sending a function test instruction corresponding to the current function test to the vehicle ECU.
In another aspect, a functional test system for vehicle diagnosis is provided, comprising a memory module including instructions loaded and executed by a processor, the instructions, when executed, causing the processor to perform one of the above-described functional test methods for vehicle diagnosis.
In a further aspect, a diagnostic device is provided having a functional test system for vehicle diagnostics as described above.
When the function test is carried out, the invention firstly sends the corresponding modification instruction to the vehicle ECU, so that the vehicle ECU can pass the detection of the restriction condition corresponding to the current function test and then sends the function test instruction, and the restriction of the restriction condition is avoided, thereby bringing convenience for the function test and improving the diagnosis efficiency.
Drawings
The invention is described in detail below with reference to the following figures and detailed description:
FIG. 1 is a flow chart of the present invention.
Detailed Description
As shown in fig. 1, an embodiment of the present specification provides a functional test method for vehicle diagnosis, including:
s101, sending a modification instruction corresponding to the current function test to the vehicle ECU, and enabling the vehicle ECU to pass the detection of the limiting condition corresponding to the current function test.
The restriction conditions corresponding to different function tests are different, so that the sent modification instruction needs to correspond to the current function test, the corresponding relation between the function test and the modification instruction can be preset, and after a user selects a certain function test in the diagnostic interface, the corresponding modification instruction can be matched through the corresponding relation.
In one embodiment, the modification instruction is a parameter reading value calibration instruction, and after receiving the parameter reading value calibration instruction, the vehicle calibrates a value at a reading address corresponding to a parameter of the limitation condition, so that the vehicle ECU detects the limitation condition.
When the DPF function test is carried out, a DPF forced regeneration command needs to be sent to the vehicle ECU, but the vehicle ECU executes the forced regeneration command only when one of the following limiting conditions is met:
1. the ECU monitors that the trapped soot parameters within the DPF have exceeded a limit that triggers regeneration or that the mileage reaches a regeneration limit.
2. The temperature (water temperature) parameter of the cooling liquid is more than 80 ℃.
3. The T4(DOC upstream temperature) temperature parameter was 230-350 ℃.
The parameters are collected by different sensors, and the collected values are respectively stored in different addresses for the ECU to read, so that the ECU can firstly calibrate the values on the corresponding addresses through parameter reading value calibration instructions before sending a DPF forced regeneration command, for example, the value of the address corresponding to the temperature of the cooling liquid is calibrated to be 85, and then the ECU can determine that the temperature of the cooling liquid is 85 ℃ at present, so that the ECU of the vehicle can detect the limit conditions.
In another embodiment, the modification instruction is a condition modification instruction, and the vehicle modifies the restriction condition after receiving the condition modification instruction, so that the vehicle ECU passes the detection of the restriction condition.
In this embodiment, the condition modifying instruction can be divided into two types: delete conditional instructions and lower conditional instructions.
The deleting condition instruction is used for enabling the vehicle ECU to delete the limiting condition; the lowering condition command is for causing the vehicle ECU to modify the threshold value in the limiting condition to lower the limiting condition, such as modifying the threshold value 80 in the above-described coolant temperature (water temperature) parameter > 80 ℃ to a value that is easily satisfied, such as 10, so that the detection of the limiting condition can be passed.
And S102, sending a function test instruction corresponding to the current function test to the vehicle ECU.
And S103, after the current function test is finished, sending an ECU restart instruction to the vehicle ECU (1101), and restoring the default limiting condition.
Based on the same inventive concept, the present specification also provides a functional test system for vehicle diagnosis, which includes a storage module including instructions loaded and executed by a processor, wherein the instructions, when executed, cause the processor to execute the steps according to the various exemplary embodiments of the present invention described in the above section of the functional test method for vehicle diagnosis.
The memory module may include a readable medium in the form of a volatile memory unit, such as a random access memory unit (RAM) and/or a cache memory unit, and may further include a read only memory unit (ROM).
Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
Based on the same inventive concept, the embodiment of the present specification further provides a diagnostic device, which has the above function testing system for vehicle diagnosis, and details are not repeated herein.
However, those skilled in the art should realize that the above embodiments are illustrative only and not limiting to the present invention, and that changes and modifications to the above described embodiments are intended to fall within the scope of the appended claims, provided they fall within the true spirit of the present invention.
Claims (8)
1. A functional test method for vehicle diagnostics, comprising:
sending a modification instruction corresponding to the current function test to a vehicle ECU (electronic control Unit), so that the vehicle ECU passes the detection of the limiting condition corresponding to the current function test;
and sending a function test instruction corresponding to the current function test to the vehicle ECU.
2. The functional test method for vehicle diagnosis according to claim 1, further comprising:
and after the current function test is finished, sending an ECU restart instruction to the vehicle ECU.
3. The functional test method for vehicle diagnosis according to claim 1 or 2, wherein the modification instruction is a parameter read value calibration instruction for causing the vehicle ECU to calibrate a value at a read address corresponding to a parameter of the limitation condition, so that the vehicle ECU passes the detection of the limitation condition.
4. The functional test method for vehicle diagnosis according to claim 1 or 2, characterized in that the modification instruction is a condition modification instruction for causing the vehicle ECU to modify the restriction condition so that the vehicle ECU passes detection of the restriction condition.
5. The functional test method for vehicle diagnosis according to claim 4, wherein the condition modification instruction is a delete condition instruction for causing the vehicle ECU to delete the restriction condition.
6. The functional test method for vehicle diagnosis according to claim 4, wherein the condition modification instruction is a lower condition instruction for causing the vehicle ECU to modify a threshold value in the restriction condition to lower the restriction condition.
7. A functional test system for vehicle diagnostics, comprising a memory module comprising instructions loaded and executed by a processor, which when executed cause the processor to perform a functional test method for vehicle diagnostics according to any one of claims 1-6.
8. A diagnostic device, characterized by a functional test system for vehicle diagnostics according to claim 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011534366.9A CN112611578A (en) | 2020-12-23 | 2020-12-23 | Function test method and system for vehicle diagnosis and diagnosis equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011534366.9A CN112611578A (en) | 2020-12-23 | 2020-12-23 | Function test method and system for vehicle diagnosis and diagnosis equipment |
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| CN112611578A true CN112611578A (en) | 2021-04-06 |
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| CN202011534366.9A Pending CN112611578A (en) | 2020-12-23 | 2020-12-23 | Function test method and system for vehicle diagnosis and diagnosis equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960394A (en) * | 2021-10-15 | 2022-01-21 | 北京聚利科技有限公司 | Detection method and device for vehicle-mounted unit, detection equipment and readable storage medium |
| CN113960394B (en) * | 2021-10-15 | 2024-05-14 | 北京聚利科技有限公司 | Detection method and device for vehicle-mounted unit, detection equipment and readable storage medium |
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| EP2717232A1 (en) * | 2012-10-05 | 2014-04-09 | SysTech International, LLC | Fraud detection in an OBD inspection system |
| US20150243109A1 (en) * | 2014-02-25 | 2015-08-27 | Ford Global Technologies, Llc | Method for triggering a vehicle system monitor |
| CN106627579A (en) * | 2015-11-04 | 2017-05-10 | 福特全球技术公司 | Coordination test in vehicle queue |
| US20180315257A1 (en) * | 2015-10-26 | 2018-11-01 | Continental Automotive France | Method for automatically adapting the conditions for establishing a diagnostic by an on-board diagnostic system |
| CN109882275A (en) * | 2019-03-20 | 2019-06-14 | 苏州国方汽车电子有限公司 | A kind of vehicle motor dpf regeneration control method and device |
-
2020
- 2020-12-23 CN CN202011534366.9A patent/CN112611578A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2717232A1 (en) * | 2012-10-05 | 2014-04-09 | SysTech International, LLC | Fraud detection in an OBD inspection system |
| US20150243109A1 (en) * | 2014-02-25 | 2015-08-27 | Ford Global Technologies, Llc | Method for triggering a vehicle system monitor |
| US20180315257A1 (en) * | 2015-10-26 | 2018-11-01 | Continental Automotive France | Method for automatically adapting the conditions for establishing a diagnostic by an on-board diagnostic system |
| CN106627579A (en) * | 2015-11-04 | 2017-05-10 | 福特全球技术公司 | Coordination test in vehicle queue |
| CN109882275A (en) * | 2019-03-20 | 2019-06-14 | 苏州国方汽车电子有限公司 | A kind of vehicle motor dpf regeneration control method and device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960394A (en) * | 2021-10-15 | 2022-01-21 | 北京聚利科技有限公司 | Detection method and device for vehicle-mounted unit, detection equipment and readable storage medium |
| CN113960394B (en) * | 2021-10-15 | 2024-05-14 | 北京聚利科技有限公司 | Detection method and device for vehicle-mounted unit, detection equipment and readable storage medium |
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Application publication date: 20210406 |