CN118008567A - Method and system for detecting faults of air inlet heating grid - Google Patents
Method and system for detecting faults of air inlet heating grid Download PDFInfo
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- CN118008567A CN118008567A CN202410153740.2A CN202410153740A CN118008567A CN 118008567 A CN118008567 A CN 118008567A CN 202410153740 A CN202410153740 A CN 202410153740A CN 118008567 A CN118008567 A CN 118008567A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 149
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 230000007613 environmental effect Effects 0.000 claims abstract description 7
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000006870 function Effects 0.000 description 10
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
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Abstract
The invention belongs to the technical field of engine control, and provides a method and a system for detecting faults of an air inlet heating grid, wherein the method comprises the following steps: acquiring the environmental temperature of an engine, the set heating intervention temperature and the operation data of the engine; judging whether an air inlet heating condition is met according to the acquired data, if so, starting air inlet heating, and controlling an air inlet heating grid to heat the air inlet temperature within a preset heating time; calculating a change value of the air inlet temperature and the engine operation data in a preset heating time; and judging whether the air inlet heating grid is faulty or not according to the air inlet temperature change value and the engine operation data change value. The method for detecting the faults of the air inlet heating grids can periodically try air inlet heating under the condition that the normal operation of the whole vehicle is not affected, judge and determine whether the air inlet heating function is invalid, realize automatic detection only in the normal operation, and early warn in advance when the faults occur, thereby solving the problem that the air inlet heating function is invalid due to grid faults.
Description
Technical Field
The invention belongs to the technical field of engine control, and particularly relates to a method and a system for detecting faults of an air inlet heating grid.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
An intake air heating grid, also known as a "heater," is a device that provides auxiliary heating to intake air in a low temperature environment of an engine. At present, in order to ensure that an engine in a vehicle can be normally started in a low-temperature environment, an air inlet heating grid is usually arranged at the front section of an air inlet pipe of the engine, and air enters the engine through the air inlet heating grid, so that the air inlet temperature is improved at low temperature, and necessary conditions are provided for combustion of the engine.
As shown in fig. 1, the control system of the air inlet heating grid is generally powered by a storage battery and indirectly controlled by an ECU control relay, and generates a larger current with a smaller resistance so as to achieve the purpose of heating the air inlet. When the function of the air inlet heating grid is invalid, the engine has the condition that the engine cannot be started due to low air inlet temperature, and is one of the reasons of the low-temperature failure to start, and the failure has the following characteristics at present:
a) No early warning exists before the fault occurs: the air inlet heating grid does not work except in a low-temperature environment;
b) Failure is not apparent: the vehicle cannot be started, but the low-temperature failure cannot be started for a plurality of reasons, and the problem of heating of the air inlet cannot be directly determined;
c) The fault impact is greater: restarting after the fault occurs is not solved, and telephone recourse is needed to determine the cause of the fault.
The existing electric control strategy is to detect the high-side voltage of the low-voltage circuit of the air inlet heating relay and directly judge whether the air inlet heating relay is adhered or not; if adhesion occurs, a large current is introduced by adding an intelligent electronic fan to blow a fuse, and the power supply circuit of the air inlet heating grid, namely the high-voltage circuit, is disconnected.
However, the detection item of the scheme is the high-side voltage of the low-voltage circuit of the relay, and the purpose of detection is to judge whether the relay is adhered or not. From the realization perspective of the air inlet heating function, the scheme can only remove the adhesion fault of the relay, but in actual use, the reason for the failure of the air inlet heating function is not only the adhesion fault of the relay, but also the failure of the whole air inlet heating function caused by the grid fracture fault, but can not be identified through the scheme.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method and a system for detecting the faults of an air inlet heating grid, which are used for periodically attempting air inlet heating through strategies, judging and determining whether an air inlet heating function is invalid, and reminding a driver to maintain and check the air inlet heating function when the air inlet heating function is invalid so as to remove a series of air inlet heating function invalid faults such as grid fracture faults.
To achieve the above object, one or more embodiments of the present invention provide the following technical solutions:
The first aspect of the invention provides an intake heating grid fault detection method, which comprises the following steps:
Acquiring the environmental temperature of an engine, the set heating intervention temperature and the operation data of the engine;
judging whether an air inlet heating condition is met according to the acquired data, if so, starting air inlet heating, and controlling an air inlet heating grid to heat the air inlet temperature within a preset heating time;
calculating the variation value of the air inlet temperature of the engine and the engine operation data in the preset heating time;
and judging whether the air inlet heating grid is faulty or not according to the air inlet temperature change value and the engine operation data change value.
A second aspect of the present invention provides an intake heating grid fault detection system comprising:
A data acquisition module configured to: acquiring the environmental temperature of an engine, the set heating intervention temperature and the operation data of the engine;
an intake air heating judgment module configured to: judging whether an air inlet heating condition is met, if so, starting air inlet heating, and controlling an air inlet heating grid to heat the air inlet temperature within a preset heating time;
A data calculation module configured to: calculating the variation value of the air inlet temperature of the engine and the engine operation data in the preset heating time;
A fault determination module configured to: and judging whether the air inlet heating grid is faulty or not according to the air inlet temperature change value and the engine operation data change value.
A third aspect of the present invention provides a computer-readable storage medium having stored thereon a program which, when executed by a processor, implements the steps in an intake heating grid fault detection method according to the first aspect of the present invention.
A fourth aspect of the invention provides an electronic device comprising a memory, a processor and a program stored on the memory and executable on the processor, the processor implementing the steps in a method for detecting a failure of an intake heating grid according to the first aspect of the invention when the program is executed.
The one or more of the above technical solutions have the following beneficial effects:
The method for detecting the faults of the air inlet heating grids can periodically try air inlet heating under the condition that the normal operation of the whole vehicle is not affected, judge and determine whether the air inlet heating function is invalid, realize automatic detection only in the normal operation, and early warn in advance when in faults, thereby solving the problem of invalid air inlet heating function caused by grid faults, reducing the low-temperature starting fault rate and improving the use experience of users.
Additional aspects of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic diagram of a control system for an intake heating grill.
Fig. 2 is a flowchart of a method for detecting a failure of an intake heating grid according to a first embodiment.
Detailed Description
Parameter interpretation:
T-Standard minimum intake temperature/. Degree.C. Noted on engine bench.
T+a-heating intervention temperature/. Degree.C.
T 1 -engine stability determination time/s.
T 2 -preset heating time/s.
T 3 -two detection intervals duration/s.
Example 1
As shown in fig. 2, the embodiment discloses a method for detecting faults of an intake heating grid, which includes:
step 1: acquiring the environmental temperature of an engine, the set heating intervention temperature and the operation data of the engine;
Step 2: judging whether an air inlet heating condition is met according to the acquired data, if so, starting air inlet heating, and controlling an air inlet heating grid to heat the air inlet temperature within a preset heating time;
step 3: calculating the variation value of the air inlet temperature of the engine and the engine operation data in the preset heating time;
Step 4: and judging whether the air inlet heating grid is faulty or not according to the air inlet temperature change value and the engine operation data change value.
In step 1, a heating intervention temperature (T+a, a is more than or equal to 0 ℃) is set according to a standard air inlet lowest temperature (T) marked on an engine bench, and the heating intervention temperature is larger than the standard air inlet lowest temperature.
The ambient temperature of the engine refers to the ambient temperature of the air prior to heating, and may be the temperature in the intake pipe of the engine (i.e., the intake air temperature) or the temperature of the environment in which the engine is located.
In step 2, judging whether an intake air heating condition is reached according to the acquired data, including:
when the ambient temperature of the engine is less than the set heating intervention temperature and the engine is in a stable operation condition, an intake air heating condition is reached.
Before starting intake air heating, judging whether the engine is in a stable operation condition or not, including:
collecting the rotating speed and torque of the engine at the time t 1;
judging whether the engine is in a stable operation condition according to the change values of the rotating speed and the torque of the engine;
After the engine is in a stable operation condition (such as the parameters of rotation speed, torque and the like are in a stable range), the air inlet heating condition is reached.
In step 3, calculating the intake air temperature and the variation value of the engine operation data within the preset heating time includes:
collecting air inlet temperature and engine operation data at the heating initial time in a preset heating time interval t 2, and air inlet temperature and engine operation data at the heating end time;
and calculating an air inlet temperature change value and an engine operation data change value according to the data value at the heating initial time and the data value at the heating end time respectively.
In step 4, determining whether the intake heating grid is faulty according to the intake temperature variation value and the engine operation data variation value includes:
If the variation value of the air inlet temperature in the preset heating time is larger than a set value and the engine is in a stable operation condition, the air inlet heating grid is not failed;
if the air inlet temperature change value in the preset heating time is larger than the set value and the engine is not in the stable running condition, detecting again after reaching the set detection interval time;
If the variation value of the air inlet temperature in the preset heating time is smaller than the set value, the air inlet heating grid is in fault.
Judging whether the temperature change value of the air inlet in the preset heating time is larger than a set value, namely judging whether the temperature of the air inlet rises after the air inlet is heated, and if not, judging that the air inlet grille fails; judging whether the engine is in a stable operation condition within a preset heating time, namely judging whether operation data of the engine before and after starting intake heating is stable within a range; if the temperature of the air inlet rises and the engine is still in a stable operation condition, the air inlet grille is not failed; if the temperature of the air inlet rises, but the running condition of the engine changes and is not in the temperature running condition, the detection is invalid, and the next stable condition is repeatedly detected;
In addition, in consideration of the reliability of the heating grid, the detection frequency should be as low as possible under the condition of reliable data, so that the detection frequency should be triggered only at low temperature, and the set detection interval time t 3 needs to be reached between two times of fault detection, for example, more than 10 days when each two times of detection needs to be separated, so as to prevent frequent detection and accelerate the aging of the grid.
Further, after judging whether the intake heating grid is faulty or not according to the intake temperature variation value and the engine operation data variation value, the method further comprises:
And if the air inlet heating grid fails, carrying out alarm prompt.
Example two
The embodiment discloses an intake heating grid fault detection system, including:
A data acquisition module configured to: acquiring the environmental temperature of an engine, the set heating intervention temperature and the operation data of the engine;
an intake air heating judgment module configured to: judging whether an air inlet heating condition is met, if so, starting air inlet heating, and controlling an air inlet heating grid to heat the air inlet temperature within a preset heating time;
A data calculation module configured to: calculating a change value of the air inlet temperature and the engine operation data in a preset heating time;
A fault determination module configured to: and judging whether the air inlet heating grid is faulty or not according to the air inlet temperature change value and the engine operation data change value.
Further, the system also comprises a fault alarm module configured to: and if the air inlet heating grid fails, carrying out alarm prompt.
Example III
An object of the present embodiment is to provide a computer-readable storage medium.
A computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in an intake heating grid fault detection method as described in embodiment 1 of the present disclosure.
Example IV
An object of the present embodiment is to provide an electronic apparatus.
An electronic device comprising a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor, when executing the program, performs steps in an intake heating grid fault detection method as described in embodiment 1 of the present disclosure.
The steps involved in the devices of the second, third and fourth embodiments correspond to those of the first embodiment of the method, and the detailed description of the embodiments can be found in the related description section of the first embodiment. The term "computer-readable storage medium" should be taken to include a single medium or multiple media including one or more sets of instructions; it should also be understood to include any medium capable of storing, encoding or carrying a set of instructions for execution by a processor and that cause the processor to perform any one of the methods of the present invention.
It will be appreciated by those skilled in the art that the modules or steps of the invention described above may be implemented by general-purpose computer means, alternatively they may be implemented by program code executable by computing means, whereby they may be stored in storage means for execution by computing means, or they may be made into individual integrated circuit modules separately, or a plurality of modules or steps in them may be made into a single integrated circuit module. The present invention is not limited to any specific combination of hardware and software.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (10)
1. A method of detecting a failure of an intake heating grid, comprising:
Acquiring the environmental temperature of an engine, the set heating intervention temperature and the operation data of the engine;
judging whether an air inlet heating condition is met according to the acquired data, if so, starting air inlet heating, and controlling an air inlet heating grid to heat the air inlet temperature within a preset heating time;
calculating the variation value of the air inlet temperature of the engine and the engine operation data in the preset heating time;
and judging whether the air inlet heating grid is faulty or not according to the air inlet temperature change value and the engine operation data change value.
2. A method for detecting a failure of an intake heating grid according to claim 1,
The heating intervention temperature is set according to the standard air inlet lowest temperature marked on the engine frame, and the heating intervention temperature is larger than the standard air inlet lowest temperature.
3. The intake air heating grid fault detection method according to claim 1, wherein the determining whether the intake air heating condition is reached based on the acquired data includes:
when the ambient temperature of the engine is less than the set heating intervention temperature and the engine is in a stable operation condition, an intake air heating condition is reached.
4. A method of detecting a failure of an intake air heating grid as set forth in claim 3, wherein determining whether the engine is in a steady operation condition before the intake air heating is started, comprises:
Collecting the rotating speed and torque of an engine;
and judging whether the engine is in a stable operation condition according to the change values of the rotating speed and the torque of the engine.
5. The intake heating grid fault detection method as set forth in claim 1, wherein the determining whether the intake heating grid is faulty based on the intake temperature variation value and the engine operation data variation value includes:
If the variation value of the air inlet temperature in the preset heating time is larger than a set value and the engine is in a stable operation condition, the air inlet heating grid is not failed;
if the air inlet temperature change value in the preset heating time is larger than the set value and the engine is not in the stable running condition, detecting again after reaching the set detection interval time;
If the variation value of the air inlet temperature in the preset heating time is smaller than the set value, the air inlet heating grid is in fault.
6. The intake heating grid fault detection method according to claim 1, further comprising, after determining whether the intake heating grid is faulty based on the intake temperature variation value and the engine operation data variation value:
And if the air inlet heating grid fails, carrying out alarm prompt.
7. An intake heating grid fault detection system, comprising:
A data acquisition module configured to: acquiring the environmental temperature of an engine, the set heating intervention temperature and the operation data of the engine;
an intake air heating judgment module configured to: judging whether an air inlet heating condition is met, if so, starting air inlet heating, and controlling an air inlet heating grid to heat the air inlet temperature within a preset heating time;
A data calculation module configured to: calculating the variation value of the air inlet temperature of the engine and the engine operation data in the preset heating time;
A fault determination module configured to: and judging whether the air inlet heating grid is faulty or not according to the air inlet temperature change value and the engine operation data change value.
8. The intake heating grid fault detection system of claim 7, further comprising a fault alert module configured to: and if the air inlet heating grid fails, carrying out alarm prompt.
9. A computer-readable storage medium, on which a program is stored, characterized in that the program, when executed by a processor, realizes the steps in an intake heating grid fault detection method as claimed in any one of claims 1 to 6.
10. An electronic device comprising a memory, a processor and a program stored on the memory and executable on the processor, wherein the processor performs the steps of a method for detecting a failure of an intake heating grid as claimed in any one of claims 1 to 6 when the program is executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410153740.2A CN118008567A (en) | 2024-02-01 | 2024-02-01 | Method and system for detecting faults of air inlet heating grid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410153740.2A CN118008567A (en) | 2024-02-01 | 2024-02-01 | Method and system for detecting faults of air inlet heating grid |
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| CN118008567A true CN118008567A (en) | 2024-05-10 |
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| CN202410153740.2A Pending CN118008567A (en) | 2024-02-01 | 2024-02-01 | Method and system for detecting faults of air inlet heating grid |
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- 2024-02-01 CN CN202410153740.2A patent/CN118008567A/en active Pending
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