CN114776437A - Water temperature correction method, device, equipment and medium for engine - Google Patents
Water temperature correction method, device, equipment and medium for engine Download PDFInfo
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- CN114776437A CN114776437A CN202210586558.7A CN202210586558A CN114776437A CN 114776437 A CN114776437 A CN 114776437A CN 202210586558 A CN202210586558 A CN 202210586558A CN 114776437 A CN114776437 A CN 114776437A
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- water temperature
- temperature value
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/14—Indicating devices; Other safety devices
- F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a water temperature correction method, a water temperature correction device, water temperature correction equipment and a water temperature correction medium for an engine. The correction method comprises the following steps: acquiring a current water temperature value read for the first time after the engine is powered on; identifying the current working state of the engine; if the working state is normal, calculating an average water temperature value in a fixed period T, and taking the corrected water temperature value as an actual water temperature value; and if the working state is a fault, correcting the current water temperature value according to different conditions of the fault, and taking the corrected water temperature value as an actual water temperature value. The method can reasonably and effectively select the current water temperature substitute value under the condition of the fault of the engine water temperature sensor or other special conditions, ensure that the automatic air-conditioning control strategy using the water temperature can normally operate, does not influence the driving safety and the comfort of passengers, and improves the user satisfaction.
Description
Technical Field
The invention is applied to the technical field of engine thermal management, and particularly relates to a water temperature value correction method and device for an engine, electronic equipment and a medium.
Background
The automobile engine is a device for providing power for an automobile, is the heart of the automobile and determines the dynamic property, the economical efficiency, the stability and the environmental protection property of the automobile. When the automobile engine runs normally, a certain working temperature is needed, and when the working temperature is too high or too low, the normal running and the performance exertion of the engine are not facilitated. At present, the engine heat management strategy is to control the operation of a fan and an engine according to the water temperature of the engine, and the requirement on the water temperature representation accuracy of the engine is high.
In the prior art, a current read value is only directly obtained from an engine water temperature sensor, but some special condition sensors cannot normally output or water temperature calculation conditions are insufficient, so that abnormal conditions such as automatic air conditioning and warm air output or fan control can be caused, and the driving safety and comfort are influenced, for example: the average value cannot be calculated when the whole vehicle is just powered on; and the sensor fails and has no signal output. The invention can solve the problems, and writes how to reasonably define the water temperature value of the engine under various special conditions in the algorithm in advance, thereby avoiding the occurrence of the condition that the normal control of other modules is influenced when the water temperature is invalid, and improving the safety of the whole vehicle and the comfort of passengers to a certain extent.
Disclosure of Invention
The present invention is directed to solving, at least in part, one of the problems of the related art.
Therefore, a first object of the present invention is to provide a water temperature correction method for an invention machine, so as to solve the problem that the water temperature cannot be normally detected in the existing water temperature correction method for an invention machine.
A second object of the present invention is to propose a water temperature correction device for the inventor.
A third object of the invention is to propose an electronic device.
A fourth object of the invention is to propose a computer-readable storage medium.
In order to achieve the above object, a first aspect of the present invention provides a water temperature correction method for an engine, including: the method comprises the following steps: acquiring a current water temperature value read for the first time after the engine is powered on; step two: identifying the current working state of the engine; step three: if the working state is normal, calculating an average water temperature value in a fixed period T, and taking the corrected water temperature value as an actual water temperature value; step four: and if the working state is a fault, correcting the current water temperature value according to different conditions of the fault, and taking the corrected water temperature value as an actual water temperature value.
According to an embodiment of the present invention, the step three: calculating the average water temperature value in a fixed period, and taking the corrected water temperature value as an actual water temperature value, further comprising:
when the calculated average water temperature value is lower than a low-temperature threshold value, taking the low-temperature threshold value as an actual water temperature value; and when the temperature is higher than the high temperature threshold, taking the high temperature threshold as the actual water temperature value.
When the engine works, the water temperature fluctuates severely, and stable control cannot be realized. In practical use, the average value of a period of time is required to be used as the calculation basis of the controller. The above values are empirical values and the range is the range of temperatures that may actually occur in a vehicle.
Further, as shown in FIG. 2, the high temperature threshold is 130 deg.C and the low temperature threshold is-40 deg.C.
The water temperature of the engine is higher than a high-temperature threshold value, and the overheating can cause great influence on the engine. For example, after the temperature of the engine cooling system is too high, the cooling system pipeline may burst, or the warm air small water tank may burst, which may cause water inlet damage of the electric components in the cab. The cylinder gasket of the engine can be damaged, cooling liquid can enter a combustion chamber to participate in combustion after the cylinder gasket is damaged, and the connecting rod can be bent at a certain probability. Even, the engine oil is too thin, and internal parts of the engine cannot be effectively lubricated, so that the abrasion of a bearing bush of the engine is aggravated, a crankshaft is pulled, and a cylinder wall is adhered to a piston.
In contrast, too low an engine temperature is detrimental: 1. the combustible mixture (or air) entering the cylinder is difficult to ignite or slow to burn due to low temperature, so that the power of the engine is reduced and the fuel consumption is increased; 2. the viscosity of the engine oil is increased, poor lubrication is caused, abrasion of parts is increased, and power consumption is increased; 3. the fuel (liquid fuel) which is not gasified due to the low temperature flushes the surface layer of the cylinder, the lubricating oil film is damaged, and the abrasion of the machine parts is accelerated.
According to an embodiment of the present invention, the fixed period T has a value range of 4S.
Here, 4S is an empirical value obtained in an actual operation test of the present invention, and a too short period causes severe numerical value fluctuation, and a too long period causes inaccurate data. The fixed period T is different in value according to different vehicle types and different engines.
According to one embodiment of the invention, the method further comprises the following step four: correcting the current water temperature value under different fault conditions, and taking the corrected water temperature value as an actual water temperature value, wherein the steps of:
if the temperature is in the fault judgment, continuing to use the average water temperature value calculated in the previous fixed period T;
in the fault treatment, adopting a default water temperature value of the system as an actual water temperature value;
and after the fault is removed, the working state is changed to be normal.
The default water temperature value of the system is a common normal water temperature value which is written and determined in software in advance, when a fault occurs, accurate water temperature cannot be provided, and the default water temperature value of the system is called as an actual water temperature value. The normal water temperature of a general automobile engine is about 90 ℃, and the temperature of a turbo-charging automobile model may be slightly higher.
The method can reasonably and effectively select the current water temperature substitute value under the condition of the fault of the engine water temperature sensor or other special conditions, ensure that the automatic air-conditioning control strategy using the water temperature can normally operate, does not influence the driving safety and the comfort of passengers, and improve the satisfaction degree of users.
In order to achieve the above object, a second aspect of the present invention provides a water temperature correction device for an engine, including:
the acquisition module is used for acquiring a current water temperature value which is originally obtained after the engine is electrified;
the identification module is used for identifying the current working state of the engine;
the normal processing module is used for calculating an average water temperature value in a fixed period when the engine is in a normal state, and taking the corrected water temperature value as an actual water temperature value;
and the fault processing module is used for correcting the current water temperature value according to different fault conditions when the engine is in a fault state, and taking the corrected water temperature value as an actual water temperature value.
To achieve the above object, a third embodiment of the present invention provides an electronic device, including a memory, a processor; wherein the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to implement the water temperature correction method for the engine provided by the embodiment of the first aspect of the invention.
To achieve the above object, a fourth aspect of the present invention provides a non-transitory computer readable storage medium, on which a computer program is stored, wherein the program is executed by a processor to implement the water temperature correction method for an engine provided by the embodiment of the first aspect of the present invention.
Drawings
FIG. 1 is a flow chart of a method for correcting an engine water temperature value.
Fig. 2 is a water temperature correction map when the engine operating state is normal.
The current water temperature value calculated in the engine fixed period is defined as TWE, and the actual water temperature value finally corrected by the engine is defined as TW.
Fig. 3 is a flow chart of water temperature correction when the engine operating state is a failure.
Fig. 4 is a schematic diagram showing a configuration of a water temperature correction device for an engine.
Fig. 5 is a schematic structural diagram of an electronic device.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements of specific same or similar functionality throughout, and which are described below with reference to the accompanying drawings, for the purpose of illustrating the invention and are not to be construed as limiting the same.
The following describes a water temperature correction method for an inventive machine according to an embodiment of the present invention with reference to the drawings.
The water temperature correction method for the invention machine provided by the application is suitable for the engine with the heat management function, and the invention machine with the heat management function is taken as an example in the following embodiment.
Fig. 1 is a flowchart of a water temperature correction method for an engine according to an embodiment of the present invention, which includes the following steps:
the method comprises the following steps: acquiring a current water temperature value read for the first time after the engine is powered on;
initial power-up mode: when the whole vehicle is just powered ON (IG:0FF-ON), but the power-ON time is less than a period, the average value cannot be calculated according to the normal working mode, at the moment, the air-conditioning controller uses the current water temperature value TWE of the engine read for the first time after the power-ON as the actual water temperature value TW,
specifically, the current water temperature value read for the first time after the engine is powered on can be obtained through a water temperature sensor arranged at the middle position of the cylinder cover according to the prior art. For example, an Electronic Control Unit (ECU) is used to Control the water temperature sensor to obtain the current water temperature value.
Step two: the current operating state of the engine is identified.
Wherein, the current working state of the engine comprises the following steps: a normal state and a fault state.
Step three: and if the working state is normal, calculating the average water temperature value in a fixed period, and taking the corrected water temperature value as the actual water temperature value.
In the normal operation mode, that is, when the entire vehicle normally operates (not in the initial stage of vehicle power-on, and no fault occurs), the air conditioner controller normally receives "engine water temperature engine temperature is 0x 0-0 xFE" and "EMS _ engine temperature error is 0x 0", then the current system normally operates without abnormality, and the current TW is defined according to the relationship between TW and TWE shown in fig. 2.
Specifically, two temperature thresholds, a low temperature threshold and a high temperature threshold, which are upper and lower line temperature ranges in which the engine is in a normal operating state, may be set for the engine in advance. When the calculated average water temperature value is lower than a low-temperature threshold value, taking the low-temperature threshold value as an actual water temperature value; and when the temperature is higher than the high temperature threshold, taking the high temperature threshold as the actual water temperature value.
As shown in FIG. 2, the low temperature threshold is-40 deg.C and the high temperature threshold is 130 deg.C.
Further, the air conditioner controller samples the engine water temperature EngineCoolanTemperature at a 200ms period, and takes the average value of the samples in the fixed period 4S as TWE, so that the deviation of automatic air conditioner calculation caused by abnormal fluctuation of the water temperature can be prevented, and the condition that passengers are uncomfortable due to fluctuation of the air outlet temperature is avoided. The content of the above mentioned signals is defined in the following table:
step four: and if the working state is a fault, correcting the current water temperature value according to different conditions of the fault, and taking the corrected water temperature value as an actual water temperature value.
Failure mode: the fault can be subdivided into the following four phases according to the period of time, and TW is defined as follows:
(1) processing in failure determination: TW maintains the average water temperature data for the previous fixed period when any one of the following three conditions is established.
(a) The engine water temperature signal EMS _ enginecooltemperature is not received.
(b) The engine water temperature signal EMS _ engine coolant temperature is received 0xFF Invalid.
(c) The engine water temperature fault signal EMS _ coolantemperature Error is received, and 0x1 is received.
(2) And (3) processing after fault determination: when any one of the following three conditions is established, it is determined as a fault, and the system default water temperature value is used instead of TW.
(a) The engine water temperature signal EMS _ enginecoolattemperature is not received for 5 seconds and more continuously.
(b) The engine water temperature signal EMS _ engine coolant temperature is received 0xFF ═ Invalid for 5 seconds and more continuously.
(c) The engine water temperature EMS _ coolantemperametureerror is 0x1 Error for 5 seconds and more continuously.
(3) Processing in failure processing: during the fault resolution determination, TW holds the previous data, and the system default water temperature value, when the following two conditions are simultaneously met.
(a) Receiving an engine water temperature signal EMS _ EngineCoolanTemperature of 0x 0-0 xFE of-48-142.5 ℃.
(b) Receiving an engine water temperature fault signal EMS _ CoolanTemperatureError which is 0x0 Noerror
(4) And (3) processing after fault removal: when the following two conditions are satisfied at the same time in determining the failure resolution, TW is calculated in the normal operation mode.
(a) The engine water temperature signal EMS _ EnginCoolanTemperature is continuously received for 5 seconds or more, wherein the EMS _ EnginCoolanTemperature is 0x 0-0 xFE-48-142.5 ℃.
(b) And continuously receiving the engine water temperature fault signal for 5 seconds or more to effectively determine that the EMS _ CoolanTemperatureError is 0x0 to No error.
The default water temperature value of the system related to the strategy is determined according to the specific water temperature condition of each vehicle type, and can be obtained through heating calibration without a uniform fixed value.
In order to implement the above embodiment, the present invention further provides a water temperature correction apparatus 100 for an engine, as shown in fig. 4, including:
the acquisition module 11 is used for acquiring a current water temperature value which is originally obtained after the engine is powered on;
the identification module 12 is used for identifying the current working state of the engine;
a normal processing module 13, configured to calculate an average water temperature value in a fixed period when the engine is in a normal state, and use the corrected water temperature value as an actual water temperature value;
and the fault processing module 14 is configured to, when the engine is in a fault state, correct the current water temperature value according to different conditions of the fault, and use the corrected water temperature value as an actual water temperature value.
To achieve the above object, an embodiment of the third aspect of the present invention provides an electronic device 200, as shown in fig. 5, including a memory 21, a processor 22; wherein the processor 22 executes a program corresponding to the executable program code by reading the executable program code stored in the memory 21, so as to implement the water temperature correction method for an engine provided by the embodiment of the first aspect of the present invention.
To achieve the above object, a fourth aspect of the present invention provides a non-transitory computer readable storage medium, on which a computer program is stored, wherein the program is executed by a processor to implement the water temperature correction method for an engine provided by the embodiment of the first aspect of the present invention.
Claims (8)
1. A water temperature correction method for an engine, characterized by comprising:
the method comprises the following steps: acquiring a current water temperature value read for the first time after the engine is powered on;
step two: identifying the current working state of the engine;
step three: if the working state is normal, calculating an average water temperature value in a fixed period T, and taking the corrected water temperature value as an actual water temperature value;
step four: and if the working state is a fault, correcting the current water temperature value according to different conditions of the fault, and taking the corrected water temperature value as an actual water temperature value.
2. The water temperature correction method for an engine according to claim 1, characterized in that in the third step: when the calculated average water temperature value is lower than a low-temperature threshold value, taking the low-temperature threshold value as an actual water temperature value; and when the average water temperature value is higher than the high-temperature threshold value, taking the high-temperature threshold value as the actual water temperature value.
3. The water temperature correction method for an engine according to claim 1, characterized in that in the third step: the fixed period T is 4S.
4. The water temperature correction method for an engine according to claim 2, characterized in that in the third step: the high temperature threshold is 130 ℃ and the low temperature threshold is-40 ℃.
5. The water temperature correction method for an engine according to claim 1, characterized in that in the fourth step, it includes:
if the water temperature is in the fault judgment, the average water temperature value calculated in the previous fixed period T is used;
in the fault treatment, adopting a default water temperature value of the system as an actual water temperature value;
and after the fault is removed, the working state is changed to be normal.
6. A water temperature correction device for an engine, characterized by comprising:
the acquisition module is used for acquiring a current water temperature value which is originally obtained after the engine is electrified;
the identification module is used for identifying the current working state of the engine;
the normal processing module is used for calculating an average water temperature value in a fixed period in a normal state and taking the corrected water temperature value as an actual water temperature value;
and the fault processing module is used for correcting the current water temperature value according to different fault conditions in a fault state, and taking the corrected water temperature value as an actual water temperature value.
7. An electronic device, comprising:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute to implement a water temperature correction method for an engine as claimed in any one of claims 1 to 5.
8. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that when the program is executed by a processor, it implements a water temperature correction method for an engine according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210586558.7A CN114776437A (en) | 2022-05-27 | 2022-05-27 | Water temperature correction method, device, equipment and medium for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210586558.7A CN114776437A (en) | 2022-05-27 | 2022-05-27 | Water temperature correction method, device, equipment and medium for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114776437A true CN114776437A (en) | 2022-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210586558.7A Withdrawn CN114776437A (en) | 2022-05-27 | 2022-05-27 | Water temperature correction method, device, equipment and medium for engine |
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| Country | Link |
|---|---|
| CN (1) | CN114776437A (en) |
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- 2022-05-27 CN CN202210586558.7A patent/CN114776437A/en not_active Withdrawn
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Application publication date: 20220722 |
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