CN112710413B - Temperature sensor checking method and device, storage medium and electronic equipment - Google Patents
Temperature sensor checking method and device, storage medium and electronic equipment Download PDFInfo
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- CN112710413B CN112710413B CN202011437084.7A CN202011437084A CN112710413B CN 112710413 B CN112710413 B CN 112710413B CN 202011437084 A CN202011437084 A CN 202011437084A CN 112710413 B CN112710413 B CN 112710413B
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Abstract
The embodiment of the application provides a temperature sensor calibration method, a temperature sensor calibration device, a storage medium and electronic equipment, and relates to the technical field of engines. According to the temperature sensor calibration method provided by the embodiment of the application, the difference value between the temperature value acquired by the temperature sensor and the reference temperature value can be determined through the temperature value acquired by the temperature sensor and the reference temperature value determined according to the running parameters of the engine, when the absolute value of the difference value is smaller than or equal to the set threshold value, the temperature value acquired by the temperature sensor is adopted by the engine electronic control unit, and when the absolute value of the difference value is larger than the set threshold value, the reference temperature value is adopted by the engine electronic control unit. The engine electronic control unit can acquire the current temperature value of the engine at any time, so that the engine always has credible temperature, and the normal operation of the engine can be maintained.
Description
Technical Field
The present disclosure relates to the field of engine technologies, and in particular, to a method and an apparatus for calibrating a temperature sensor, a storage medium, and an electronic device.
Background
If the temperature of the cooling water and the engine oil in the engine is too high or too low, the engine cannot normally operate, and the temperature of the cooling water and the temperature of the engine oil in the engine can be respectively collected by a cooling water temperature sensor and an engine oil temperature sensor through an engine Electronic Control Unit (ECU), so that the water temperature and the oil temperature in the engine are monitored in real time.
Currently, if hardware or lines of a cooling water temperature sensor and an oil temperature sensor fail, there is no effective method to determine the current engine water temperature and oil temperature, thereby adversely affecting the control of the engine.
Disclosure of Invention
In order to solve the existing technical problems, embodiments of the present application provide a temperature sensor calibration method, device, storage medium, and electronic device, which can effectively calculate the water temperature and the oil temperature of an engine and maintain the normal operation of the engine.
In order to achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a temperature sensor verification method, where the method includes:
acquiring a temperature value acquired by a temperature sensor, and determining a reference temperature value according to an operating parameter of the engine;
determining a difference value between the temperature value acquired by the temperature sensor and the reference temperature value;
if the absolute value of the difference is smaller than or equal to a set threshold value, adopting a temperature value acquired by the temperature sensor;
and if the absolute value of the difference value is greater than a set threshold value, adopting the reference temperature value.
According to the temperature sensor calibration method provided by the embodiment of the application, the engine electronic control unit can determine the difference value between the temperature value acquired by the temperature sensor and the reference temperature value according to the temperature value acquired by the temperature sensor and the reference temperature value determined according to the running parameters of the engine, when the absolute value of the difference value is smaller than or equal to the set threshold value, the engine electronic control unit adopts the temperature value acquired by the temperature sensor, and when the absolute value of the difference value is larger than the set threshold value, the engine electronic control unit adopts the reference temperature value. The engine electronic control unit can acquire the current temperature value of the engine at any time, so that the engine always has credible temperature, and the normal operation of the engine can be maintained.
In an optional embodiment, if the absolute value of the difference is greater than the set threshold, using the reference temperature value includes:
if the absolute value of the difference value is larger than the set threshold value, acquiring the temperature value acquired by the temperature sensor and the reference temperature value at intervals of first set time, determining the difference value between the temperature value acquired by the temperature sensor and the reference temperature value, and adopting the reference temperature value if the absolute value of the difference value is larger than the set threshold value in second set time.
In this embodiment, after the engine electronic control unit determines the difference between the temperature value acquired by the temperature sensor and the reference temperature value, when the absolute value of the difference is greater than the set threshold, the engine electronic control unit may acquire the temperature value acquired by the temperature sensor and the reference temperature value at every first set time interval, determine the difference between the temperature value acquired by the temperature sensor and the reference temperature value, and if the absolute values of the difference are greater than the set threshold in the second set time, the engine electronic control unit uses the reference temperature value. Therefore, when the temperature value acquired by the temperature sensor is not credible, the engine electric control unit can adopt the reference temperature value as the substitute temperature value, so that the control of the engine is not influenced.
In an alternative embodiment, the step of using the reference temperature values when the absolute values of the difference values in the second set time are both greater than the set threshold includes:
the absolute values of the difference values are all larger than a set threshold value within a second set time, and if fault information of a first type of fault is received, the reference temperature value is adopted;
and the absolute values of the difference values are all larger than a set threshold value within a second set time, if the fault information of the first type of fault is not received, the second type of fault is determined to occur, and the reference temperature value is adopted.
In this embodiment, when the absolute value of the difference between the temperature value acquired by the temperature sensor and the reference temperature value is greater than the set threshold value within the second set time, if the engine electronic control unit receives the fault information of the first type of fault sent by the temperature sensor, the reference temperature value is adopted, and if the engine electronic control unit does not receive the fault information of the first type of fault sent by the temperature sensor, it is determined that the second type of fault occurs in the temperature sensor, and at this time, the engine electronic control unit adopts the reference temperature value. Therefore, when the temperature value acquired by the temperature sensor is not credible, the engine electronic control unit can judge which type of fault occurs to the temperature sensor, and the reference temperature value is adopted as the substitute temperature value, so that the control of the engine is not influenced.
In an optional embodiment, the absolute values of the difference values in the second set time are all greater than a set threshold, if the fault information of the first type of fault is not received, it is determined that the second type of fault occurs, and after the reference temperature value is adopted, the method further includes:
respectively acquiring a temperature value and a reference temperature value acquired by a temperature sensor in real time, and determining a difference value between the temperature value acquired by the temperature sensor and the reference temperature value;
if the absolute value of the difference is smaller than or equal to the set threshold, respectively acquiring the temperature value acquired by the temperature sensor and the reference temperature value at intervals of first set time, determining the difference between the temperature value acquired by the temperature sensor and the reference temperature value, and adopting the temperature values acquired by the temperature sensor when the absolute values of the difference are smaller than or equal to the set threshold in third set time.
In this embodiment, after determining that the temperature sensor has the second type of fault and using the reference temperature value, the engine electronic control unit respectively obtains the temperature value acquired by the temperature sensor and the reference temperature value in real time, determines a difference between the temperature value acquired by the temperature sensor and the reference temperature value, and if the absolute value of the difference between the temperature value acquired by the temperature sensor and the reference temperature value is smaller than or equal to the set threshold, the engine electronic control unit respectively obtains the temperature value acquired by the temperature sensor and the reference temperature value at intervals of a first set time, determines a difference between the temperature value acquired by the temperature sensor and the reference temperature value, and when the absolute value of the difference between the temperature value acquired by the temperature sensor and the reference temperature value is smaller than or equal to the set threshold in a third set time, the engine electronic control unit uses the temperature value acquired by the temperature sensor. Therefore, when the engine electronic control unit judges that the temperature sensor has the second type of fault, if the second type of fault is cured, the engine electronic control unit can convert the adopted reference temperature value into the temperature value acquired by the temperature sensor, so that the engine can have more accurate temperature and cannot enter a degradation state.
In an alternative embodiment, the operating parameters of the engine include fuel injection amount, engine speed, ambient temperature, vehicle speed, and fan control signal; the determining a reference temperature value based on an operating parameter of the engine includes:
determining the power of the engine according to the fuel injection quantity and the rotating speed of the engine;
determining engine heat loss based on engine power and engine speed;
a reference temperature value is determined based on the ambient temperature, the engine heat loss, the vehicle speed, and the fan control signal.
In this embodiment, the operation parameters of the engine include an oil injection amount, an engine rotation speed, an ambient temperature, a vehicle speed, and a fan control signal, and the engine electronic control unit may determine an engine power according to the oil injection amount and the engine rotation speed, then determine an engine heat loss according to the engine power and the engine rotation speed, and then determine a reference temperature value according to the ambient temperature, the engine heat loss, the vehicle speed, and the fan control signal, so that the engine electronic control unit may use the calculated reference temperature value as a temperature substitute value after determining that the temperature sensor has a fault, thereby maintaining normal operation of the engine.
In a second aspect, an embodiment of the present application further provides a temperature sensor calibration apparatus, including:
the temperature acquisition module is used for acquiring a temperature value acquired by the temperature sensor and determining a reference temperature value according to the operating parameters of the engine;
the difference value determining module is used for determining the difference value between the temperature value acquired by the temperature sensor and the reference temperature value;
the temperature determining module is used for adopting the temperature value acquired by the temperature sensor if the absolute value of the difference value is less than or equal to a set threshold value; and if the absolute value of the difference is larger than a set threshold, adopting the reference temperature value.
In an optional embodiment, the temperature determining module is specifically configured to:
if the absolute value of the difference value is larger than the set threshold value, acquiring the temperature value acquired by the temperature sensor and the reference temperature value at intervals of first set time, determining the difference value between the temperature value acquired by the temperature sensor and the reference temperature value, and adopting the reference temperature value if the absolute value of the difference value is larger than the set threshold value in second set time.
In an optional embodiment, the temperature determination module is further configured to:
the absolute values of the difference values are all larger than a set threshold value within a second set time, and if fault information of a first type of fault is received, the reference temperature value is adopted;
and the absolute values of the difference values are all larger than a set threshold value within a second set time, if the fault information of the first type of fault is not received, the second type of fault is determined to occur, and the reference temperature value is adopted.
In an optional embodiment, the temperature determination module is further configured to:
respectively acquiring a temperature value and a reference temperature value acquired by a temperature sensor in real time, and determining a difference value between the temperature value acquired by the temperature sensor and the reference temperature value;
if the absolute value of the difference is smaller than or equal to the set threshold, the difference between the temperature value acquired by the temperature sensor and the reference temperature value is determined every first set time, and the absolute value of the difference is smaller than or equal to the set threshold in the third set time, so that the temperature value acquired by the temperature sensor is adopted.
In an alternative embodiment, the operating parameters of the engine include fuel injection amount, engine speed, ambient temperature, vehicle speed, and fan control signal; the temperature acquisition module is specifically configured to:
determining the power of the engine according to the fuel injection quantity and the rotating speed of the engine;
determining engine heat loss based on engine power and engine speed;
a reference temperature value is determined based on the ambient temperature, the engine heat loss, the vehicle speed, and the fan control signal.
In a third aspect, an embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the temperature sensor verification method of the first aspect is implemented.
In a fourth aspect, this application embodiment further provides an electronic device, including a memory and a processor, where the memory stores a computer program executable on the processor, and when the computer program is executed by the processor, the processor is enabled to implement the temperature sensor verification method of the first aspect.
For technical effects brought by any one implementation manner in the second aspect to the fourth aspect, reference may be made to technical effects brought by a corresponding implementation manner in the first aspect, and details are not described here.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a flowchart of a method for verifying a temperature sensor according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a temperature calculation module according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of another temperature calculation module according to an embodiment of the present disclosure;
fig. 4 is a flowchart of an overall scheme of a temperature sensor verification method according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a temperature sensor calibration apparatus according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that references in the specification of the present application to the terms "comprises" and "comprising," and variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The embodiment of the application provides a temperature sensor calibration method, as shown in fig. 1, comprising the following steps:
and step S101, acquiring a temperature value acquired by a temperature sensor, and determining a reference temperature value according to the operating parameters of the engine.
An Electronic Control Unit (ECU) of the engine can acquire a temperature value acquired by a temperature sensor, determine engine power according to an injection quantity and an engine speed in operation parameters of the engine, determine engine heat loss according to the engine power and the engine speed, and determine a reference temperature value according to an ambient temperature, a vehicle speed, a fan Control signal and the engine heat loss in the operation parameters of the engine.
Step S102, determining a difference value between the temperature value acquired by the temperature sensor and a reference temperature value.
The ECU can determine the difference value between the temperature value acquired by the temperature sensor and the reference temperature value according to the acquired temperature value acquired by the temperature sensor and the reference temperature value.
Step S103, determining whether the absolute value of the difference is greater than a set threshold value; if not, executing step S104; if so, step S105 is performed.
And step S104, adopting the temperature value collected by the temperature sensor.
Step S105, a reference temperature value is adopted.
The ECU may employ the temperature value collected by the temperature sensor when an absolute value of a difference between the temperature value collected by the temperature sensor and the reference temperature value is less than or equal to a set threshold value. And when the absolute value of the difference is greater than the set threshold, respectively acquiring the temperature value acquired by the temperature sensor and the reference temperature value every first set time, and determining the difference between the temperature value acquired by the temperature sensor and the reference temperature value, wherein if the absolute value of the difference between the temperature value acquired by the temperature sensor and the reference temperature value is greater than the set threshold in the second set time, the ECU can adopt the reference temperature value.
In one embodiment, when the absolute values of the difference values between the temperature value collected by the temperature sensor and the reference temperature value in the second set time are both greater than the set threshold value, if the temperature sensor sends the fault information of the first type fault to the ECU, the ECU may report that the first type fault occurs in the temperature sensor, and use the reference temperature value. If the temperature sensor does not send fault information for the first type of fault to the ECU, the ECU may determine that the temperature sensor has a second type of fault and also use the reference temperature value.
If the ECU determines that the temperature sensor has the second type of fault, the temperature value and the reference temperature value acquired by the temperature sensor can be respectively acquired in real time, and the difference value between the temperature value acquired by the temperature sensor and the reference temperature value is determined. When the absolute value of the difference between the two values is smaller than or equal to the set threshold, the ECU may respectively obtain the temperature value and the reference temperature value acquired by the temperature sensor every first set time, and determine the difference between the temperature value acquired by the temperature sensor and the reference temperature value. If the absolute value of the difference between the two values is less than or equal to the set threshold value within the third set time, the temperature value can convert the adopted reference temperature value into the temperature value collected by the temperature sensor.
According to the temperature sensor calibration method provided by the embodiment of the application, the engine electronic control unit can determine the difference value between the temperature value acquired by the temperature sensor and the reference temperature value according to the temperature value acquired by the temperature sensor and the reference temperature value determined according to the running parameters of the engine, when the absolute value of the difference value is smaller than or equal to the set threshold value, the engine electronic control unit adopts the temperature value acquired by the temperature sensor, and when the absolute value of the difference value is larger than the set threshold value, the engine electronic control unit adopts the reference temperature value. The engine electronic control unit can acquire the current temperature value of the engine at any time, so that the engine always has credible temperature, and the normal operation of the engine can be maintained.
In an alternative embodiment, the reference temperature values may include a cooling water reference temperature value and an oil reference temperature value. After acquiring the fuel injection quantity, the engine speed, the ambient temperature, the vehicle speed and the fan control signal, the ECU may obtain a reference temperature value by using a temperature calculation module as shown in fig. 2. The temperature calculation module may output a cooling water reference temperature, an oil reference temperature, and a fan speed.
In another alternative embodiment, the temperature calculation module may specifically include an engine power calculation module, an engine heat loss calculation module, an oil temperature calculation module, a fan speed calculation module, and a cooling water temperature calculation module. The initial cooling water temperature and the initial oil temperature may be previously set before the reference temperature value is calculated by the temperature calculation module. As shown in fig. 3, the injected fuel quantity and the engine speed may be input into an engine power calculation module, which may calculate engine power based on the injected fuel quantity, the engine speed, and the initial cooling water temperature. Specifically, the engine power calculation module may search the indicated engine torque in a preset engine operation parameter table according to the fuel injection amount and the engine rotation speed, search the friction torque in the engine operation parameter table according to the engine rotation speed and the initial cooling water temperature, superimpose the indicated engine torque and the friction torque, multiply the superimposed indicated engine torque and friction torque with the engine rotation speed, and divide the obtained value by 9550 to obtain the engine power.
After obtaining the engine power, the engine power and the engine speed may be input into the engine heat loss calculation module, and the engine heat loss calculation module may find the heat loss coefficient in the engine operation parameter table according to the engine power, and then multiply the heat loss coefficient by the engine power to obtain the heat transferred from the engine to the cooling system. According to the heat quantity transferred to the cooling system by the engine and the rotating speed of the engine, the heat quantity proportion transferred to the engine oil by the engine is searched in the engine operation parameter table, and the heat quantity transferred to the engine oil by the engine can be determined according to the heat quantity proportion transferred to the engine oil by the engine. After the heat proportion transmitted to the engine oil by the engine is obtained, the heat proportion transmitted to the cooling water by the engine can be calculated according to the heat transmitted to the cooling system by the engine and the heat proportion transmitted to the engine oil by the engine, and then the heat transmitted to the cooling water by the engine is determined. Therefore, the heat quantity transferred to the engine oil by the engine per unit time and the heat quantity transferred to the cooling water by the engine per unit time can be output by the engine heat loss calculation module.
The ECU may acquire the ambient temperature through an ambient temperature sensor in the engine and may then input the ambient temperature into the oil temperature calculation module. The oil temperature calculation module may calculate the amount of heat transferred to the environment per unit time and the amount of heat transferred to the cooling water per unit time. The heat quantity transferred to the environment by the engine oil per unit time = (initial engine oil temperature-environment temperature) × engine oil and environment heat transfer coefficient, and the heat quantity transferred to the cooling water by the engine oil per unit time = (initial engine oil temperature-initial cooling water temperature) × engine oil and cooling water heat transfer coefficient. According to the heat quantity A transferred to the environment by the engine oil per unit time, the heat quantity B transferred to the cooling water by the engine oil per unit time and the heat quantity C transferred to the engine oil by the engine per unit time, the engine oil temperature change rate can be calculated:
and obtaining an oil reference temperature according to the obtained oil temperature change rate, wherein the oil reference temperature is obtained by integrating the oil temperature change rate.
The fan control signal and the vehicle speed may be input to the fan speed calculation module, and the fan speed and the heat dissipation amount of the radiator may be output. In the cooling water temperature calculation module, the amount of heat transferred to the environment by the cooling water per unit time and the amount of heat dissipated by the cooling water through the radiator per unit time can be calculated. The heat dissipation amount of the cooling water passing through the radiator in unit time can be determined according to the temperature of the initial cooling water and the heat dissipation amount of the radiator, and the heat quantity transferred to the environment by the cooling water in unit time is = (the temperature of the initial cooling water-the temperature of the environment) × the heat transfer coefficient between the cooling water and the environment. From the heat quantity D of the engine transferred to the cooling water per unit time, the heat quantity E of the cooling water transferred to the environment per unit time, and the heat radiation quantity F of the cooling water through the radiator per unit time, the cooling water temperature change rate can be calculated:
from the obtained cooling water temperature change rate, a cooling water reference temperature that is an integral of the cooling water temperature change rate can be obtained.
Fig. 4 is a flowchart of an overall scheme of a temperature sensor calibration method according to an embodiment of the present disclosure, where the temperature sensor may be a cooling water temperature sensor or an oil temperature sensor, and in the present embodiment, a calibration process of the ECU on the cooling water temperature sensor is taken as an example for detailed description, and the calibration process of the ECU on the oil temperature sensor is the same as this.
As shown in fig. 4, the following steps may be included:
step S401, a cooling water reference temperature value output by the temperature calculation module and a cooling water temperature value collected by the cooling water temperature sensor are respectively obtained.
The ECU can respectively acquire a cooling water reference temperature value output by the temperature calculation module and a cooling water temperature value acquired by the cooling water temperature sensor.
And step S402, determining the difference value between the cooling water temperature value collected by the cooling water temperature sensor and the cooling water reference temperature value.
The ECU can determine the difference value of the reference temperature value of the cooling water output by the temperature calculation module and the temperature value of the cooling water collected by the cooling water temperature sensor according to the obtained reference temperature value of the cooling water and the obtained temperature value of the cooling water.
Step S403, determining whether the absolute value of the difference is greater than a set threshold; if not, executing step S404; if so, step S405 is performed.
And S404, adopting the cooling water temperature value collected by the cooling water temperature sensor.
Step S405, determining whether the fault of the cooling water temperature sensor is a first type fault; if yes, go to step S406; if not, step S407 is performed.
In step S406, a reference temperature value of cooling water is adopted.
And step S407, determining that the fault of the cooling water temperature sensor is a second type of fault, and adopting a reference temperature value of the cooling water.
When the absolute value of the difference between the cooling water temperature value and the cooling water reference temperature value is less than or equal to the set threshold value of 5 degrees, the ECU may adopt the cooling water temperature value collected by the cooling water temperature sensor.
When the absolute value of the difference between the cooling water temperature value and the cooling water reference temperature value is greater than 5 degrees, the ECU can respectively acquire the cooling water temperature value and the cooling water reference temperature value acquired by the cooling water temperature sensor every 100ms at intervals of the first set time, and the difference between the two values is determined. If the absolute value of the difference between the two is always greater than 5 degrees within 1 minute of the second set time, secondary analysis is carried out, if the cooling water temperature sensor sends fault information of line faults to the ECU, the fault information can be short circuit, open circuit and the like, and the ECU can report alarm prompt information of the line faults of the cooling water temperature sensor after receiving the fault information and adopt the reference temperature value of the cooling water to replace the temperature value of the cooling water. If the ECU does not receive fault information of line faults sent by the cooling water temperature sensor, a fault code can be triggered, the fault code means that the cooling water temperature value collected by the cooling water temperature sensor is not credible, at the moment, the ECU does not adopt the temperature value collected by the cooling water temperature sensor any more, but adopts a reference temperature value, and adopts a fixed change rate during switching, and the temperature value collected by the cooling water temperature sensor gradually changes into the reference temperature value within 20 s.
And step S408, determining that the absolute values of the difference values in the third set time are all smaller than or equal to a set threshold value, and adopting the cooling water temperature value collected by the cooling water temperature sensor.
When the ECU determines that the fault of the cooling water temperature sensor is a second type of fault, and the reference temperature value of the cooling water is adopted, the cooling water temperature value and the reference temperature value of the cooling water, which are acquired by the cooling water temperature sensor, can be respectively obtained in real time, and the difference value between the two values is determined. When the absolute value of the difference is less than or equal to 5 degrees, the ECU still adopts the cooling water reference temperature value, and obtains the cooling water temperature value and the cooling water reference temperature value acquired by the cooling water temperature sensor at intervals of 100ms respectively to determine the difference between the two values. If the absolute value of the difference value is always less than or equal to 5 degrees within 5 minutes of the third set time, the ECU can convert the adopted reference cooling water temperature value into the cooling water temperature value, meanwhile, the unreliable fault code of the cooling water temperature sensor is cured, a fixed change rate is adopted in the process of converting the reference cooling water temperature value into the cooling water temperature value, and the reference temperature value is gradually changed into the temperature value collected by the cooling water temperature sensor within 20 s.
The temperature sensor calibration method shown in fig. 1 is based on the same inventive concept, and a temperature sensor calibration device is further provided in the embodiment of the present application. Because the device is a device corresponding to the temperature sensor verification method, and the principle of solving the problems of the device is similar to that of the method, the implementation of the device can refer to the implementation of the method, and repeated details are not repeated.
Fig. 5 shows a schematic structural diagram of a temperature sensor verification apparatus provided in an embodiment of the present application, and as shown in fig. 5, the temperature sensor verification apparatus includes a temperature obtaining module 501, a difference determining module 502, and a temperature determining module 503.
The temperature acquisition module 501 is configured to acquire a temperature value acquired by a temperature sensor, and determine a reference temperature value according to an operating parameter of an engine;
a difference value determining module 502, configured to determine a difference value between the temperature value acquired by the temperature sensor and a reference temperature value;
a temperature determining module 503, configured to use a temperature value acquired by a temperature sensor if the absolute value of the difference is smaller than or equal to a set threshold; and if the absolute value of the difference is larger than the set threshold, adopting a reference temperature value.
In an alternative embodiment, the temperature determining module 503 is specifically configured to:
if the absolute value of the difference is larger than the set threshold, respectively acquiring the temperature value acquired by the temperature sensor and the reference temperature value every first set time, determining the difference between the temperature value acquired by the temperature sensor and the reference temperature value, and adopting the reference temperature value when the absolute values of the difference are larger than the set threshold in the second set time.
In an alternative embodiment, the temperature determination module 503 is further configured to:
the absolute values of the difference values within the second set time are all larger than the set threshold value, and if the fault information of the first type of fault is received, a reference temperature value is adopted;
and if the fault information of the first type of fault is not received, determining that the second type of fault occurs, and adopting a reference temperature value.
In an alternative embodiment, the temperature determination module 503 is further configured to:
respectively acquiring a temperature value and a reference temperature value acquired by a temperature sensor in real time, and determining a difference value between the temperature value acquired by the temperature sensor and the reference temperature value;
if the absolute value of the difference is smaller than or equal to the set threshold, the difference between the temperature value acquired by the temperature sensor and the reference temperature value is determined every first set time, and the absolute value of the difference is smaller than or equal to the set threshold in the third set time, and the temperature value acquired by the temperature sensor is adopted.
In an alternative embodiment, the engine operating parameters include fuel injection quantity, engine speed, ambient temperature, vehicle speed, and fan control signals; the temperature obtaining module 501 is specifically configured to:
determining the power of the engine according to the fuel injection quantity and the rotating speed of the engine;
determining engine heat loss based on engine power and engine speed;
a reference temperature value is determined based on the ambient temperature, the engine heat loss, the vehicle speed, and the fan control signal.
The electronic equipment is based on the same inventive concept as the method embodiment, and the embodiment of the application also provides the electronic equipment. The electronic device may be an engine ECU for temperature sensor verification. In this embodiment, the structure of the electronic device may be as shown in fig. 6, including a memory 601 and one or more processors 602.
A memory 601 for storing computer programs executed by the processor 602. The memory 601 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, a program required for running an instant messaging function, and the like; the storage data area can store various instant messaging information, operation instruction sets and the like.
The memory 601 may be a volatile memory (volatile memory), such as a random-access memory (RAM); the memory 601 may also be a non-volatile memory (non-volatile memory) such as, but not limited to, a read-only memory (rom), a flash memory (flash memory), a Hard Disk Drive (HDD) or a solid-state drive (SSD), or the memory 601 may be any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 601 may be a combination of the above memories.
The processor 602 may include one or more Central Processing Units (CPUs), a digital processing unit, and the like. The processor 602 is configured to implement the temperature sensor verification method when the computer program stored in the memory 501 is called.
The specific connection medium between the memory 601 and the processor 602 is not limited in the embodiments of the present application. In fig. 6, the memory 601 and the processor 602 are connected by a bus 603, the bus 603 is represented by a thick line in fig. 6, and the connection manner between other components is merely illustrative and not limited. The bus 603 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 6, but this is not intended to represent only one bus or type of bus.
According to an aspect of the application, a computer program product or computer program is provided, comprising computer instructions, the computer instructions being stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and executes the computer instructions, so that the computer device executes the license plate classification method in the above embodiment. The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.
Claims (6)
1. A method of determining an engine water temperature, characterized by comprising:
according to the fuel injection quantity and the engine rotating speed, the indicated torque of the engine is searched in an engine operating parameter table, and according to the rotating speed of the engine and the initial cooling water temperature, the friction torque is searched in the engine operating parameter table;
superposing the engine indicated torque and the friction torque, multiplying the superposed torque by the engine rotating speed, and dividing an obtained value by 9550 to obtain engine power; according to the engine power, finding a heat loss coefficient in the engine operation parameter table, and multiplying the heat loss coefficient by the engine power to obtain the heat transferred to a cooling system by the engine;
according to the heat quantity transferred to a cooling system by the engine and the rotating speed of the engine, the heat quantity proportion transferred to the engine oil by the engine is searched in the engine operation parameter table, and according to the heat quantity transferred to the cooling system by the engine and the heat quantity proportion transferred to the engine oil by the engine, the heat quantity proportion transferred to the cooling water by the engine is determined; determining the heat quantity transferred to the cooling water by the engine according to the heat quantity proportion transferred to the cooling water by the engine;
acquiring the ambient temperature through an ambient temperature sensor in an engine, and determining the heat quantity transferred to the environment by the cooling water in unit time according to the initial cooling water temperature, the ambient temperature and the heat transfer coefficient between the cooling water and the environment; determining the heat dissipation capacity of cooling water passing through the radiator in unit time according to the initial cooling water temperature and the heat dissipation capacity of the radiator;
determining the change rate of the temperature of the cooling water according to the heat quantity transferred to the environment by the cooling water in unit time, the heat dissipation quantity of the cooling water passing through a radiator in unit time and the heat quantity transferred to the cooling water by the engine in unit time, and integrating the change rate of the temperature of the cooling water to determine a reference temperature value of the cooling water;
determining the difference value between the cooling water temperature value acquired by the cooling water temperature sensor and the cooling water reference temperature value;
if the absolute value of the difference is smaller than or equal to a set threshold value, adopting a cooling water temperature value acquired by a cooling water temperature sensor;
if the absolute value of the difference is larger than a set threshold, respectively acquiring a cooling water temperature value and a cooling water reference temperature value acquired by a cooling water temperature sensor at intervals of a first set time, and determining the difference between the cooling water temperature value acquired by the cooling water temperature sensor and the cooling water reference temperature value; the absolute values of the difference values are all larger than a set threshold value within a second set time, and if fault information of a first type of fault is received, the reference temperature value of the cooling water is adopted; the absolute values of the difference values are all larger than a set threshold value within a second set time, if the fault information of the first type of fault is not received, the occurrence of the second type of fault is determined, and the reference temperature value of the cooling water is adopted; the absolute values of the difference values are all larger than a set threshold value within a second set time, if the fault information of the first type of fault is not received, the occurrence of the second type of fault is determined, after the cooling water reference temperature value is adopted, the cooling water temperature value and the cooling water reference temperature value which are acquired by a cooling water temperature sensor are respectively acquired in real time, and the difference value of the cooling water temperature value and the cooling water reference temperature value which are acquired by the cooling water temperature sensor is determined; if the absolute value of the difference is smaller than or equal to a set threshold, respectively obtaining a cooling water temperature value and a cooling water reference temperature value acquired by a cooling water temperature sensor at intervals of a first set time, determining the difference between the cooling water temperature value acquired by the cooling water temperature sensor and the cooling water reference temperature value, and adopting the cooling water temperature value acquired by the cooling water temperature sensor when the absolute value of the difference is smaller than or equal to the set threshold in a third set time.
2. A method of determining engine oil temperature, comprising:
according to the fuel injection quantity and the engine rotating speed, the indicated torque of the engine is searched in an engine operating parameter table, and according to the rotating speed of the engine and the initial cooling water temperature, the friction torque is searched in the engine operating parameter table;
superposing the engine indicated torque and the friction torque, multiplying the superposed torque by the engine rotating speed, and dividing an obtained value by 9550 to obtain engine power; according to the engine power, finding a heat loss coefficient in the engine operation parameter table, and multiplying the heat loss coefficient by the engine power to obtain the heat transferred to a cooling system by the engine;
according to the heat quantity transferred to a cooling system by the engine and the rotating speed of the engine, the heat quantity proportion transferred to the engine oil by the engine is searched in the engine operation parameter table, and the heat quantity transferred to the engine oil by the engine is determined according to the heat quantity proportion transferred to the engine oil by the engine;
acquiring an ambient temperature through an ambient temperature sensor in an engine, and determining heat transferred to the environment by engine oil in unit time according to the initial engine oil temperature, the ambient temperature and an engine oil and ambient heat transfer coefficient; determining the heat quantity transferred to the cooling water by the engine oil in unit time according to the initial engine oil temperature, the initial cooling water temperature and the heat transfer coefficient of the engine oil and the cooling water;
determining the change rate of the engine oil temperature according to the heat transferred to the environment by the engine oil in unit time, the heat transferred to the cooling water by the engine oil in unit time and the heat transferred to the engine oil by the engine in unit time, and integrating the change rate of the engine oil temperature to determine an engine oil reference temperature value;
determining a difference value between an engine oil temperature value acquired by an engine oil temperature sensor and the engine oil reference temperature value;
if the absolute value of the difference is smaller than or equal to a set threshold, adopting an engine oil temperature value acquired by the engine oil temperature sensor;
if the absolute value of the difference is larger than a set threshold, respectively acquiring an engine oil temperature value and an engine oil reference temperature value acquired by an engine oil temperature sensor at intervals of a first set time, and determining the difference between the engine oil temperature value acquired by the engine oil temperature sensor and the engine oil reference temperature value; the absolute values of the difference values are all larger than a set threshold value within a second set time, and if fault information of a first type of fault is received, the engine oil reference temperature value is adopted; the absolute values of the difference values are all larger than a set threshold value within a second set time, if the fault information of the first type of fault is not received, the second type of fault is determined to occur, and the engine oil reference temperature value is adopted; the absolute values of the difference values are all larger than a set threshold value within a second set time, if the fault information of the first type of fault is not received, the second type of fault is determined to occur, after the engine oil reference temperature value is adopted, an engine oil temperature value and an engine oil reference temperature value which are acquired by an engine oil temperature sensor are respectively acquired in real time, and the difference value of the engine oil temperature value and the engine oil reference temperature value which are acquired by the engine oil temperature sensor is determined; if the absolute value of the difference is smaller than or equal to a set threshold, respectively acquiring an engine oil temperature value and an engine oil reference temperature value acquired by an engine oil temperature sensor at intervals of a first set time, determining the difference between the engine oil temperature value acquired by the engine oil temperature sensor and the engine oil reference temperature value, and adopting the engine oil temperature value acquired by the engine oil temperature sensor when the absolute value of the difference is smaller than or equal to the set threshold in a third set time.
3. An apparatus for determining a temperature of water in an engine, comprising:
the temperature acquisition module is used for searching engine indicated torque in an engine operation parameter table according to the fuel injection quantity and the engine rotating speed, and searching friction torque in the engine operation parameter table according to the engine rotating speed and the initial cooling water temperature; superposing the engine indicated torque and the friction torque, multiplying the superposed torque by the engine rotating speed, and dividing an obtained value by 9550 to obtain engine power; according to the engine power, finding a heat loss coefficient in the engine operation parameter table, and multiplying the heat loss coefficient by the engine power to obtain the heat transferred to a cooling system by the engine; according to the heat quantity transferred to a cooling system by the engine and the rotating speed of the engine, the heat quantity proportion transferred to the engine oil by the engine is searched in the engine operation parameter table, and according to the heat quantity transferred to the cooling system by the engine and the heat quantity proportion transferred to the engine oil by the engine, the heat quantity proportion transferred to the cooling water by the engine is determined; determining the heat quantity transferred to the cooling water by the engine according to the heat quantity proportion transferred to the cooling water by the engine; acquiring the ambient temperature through an ambient temperature sensor in an engine, and determining the heat quantity transferred to the environment by the cooling water in unit time according to the initial cooling water temperature, the ambient temperature and the heat transfer coefficient between the cooling water and the environment; determining the heat dissipation capacity of cooling water passing through the radiator in unit time according to the initial cooling water temperature and the heat dissipation capacity of the radiator; determining the change rate of the temperature of the cooling water according to the heat quantity transferred to the environment by the cooling water in unit time, the heat dissipation quantity of the cooling water passing through a radiator in unit time and the heat quantity transferred to the cooling water by the engine in unit time, and integrating the change rate of the temperature of the cooling water to determine a reference temperature value of the cooling water;
the difference value determining module is used for determining the difference value between the cooling water temperature value acquired by the cooling water temperature sensor and the cooling water reference temperature value;
the temperature determining module is used for adopting the cooling water temperature value acquired by the cooling water temperature sensor if the absolute value of the difference value is smaller than or equal to a set threshold value; if the absolute value of the difference is larger than a set threshold, respectively acquiring a cooling water temperature value and a cooling water reference temperature value acquired by a cooling water temperature sensor at intervals of a first set time, and determining the difference between the cooling water temperature value acquired by the cooling water temperature sensor and the cooling water reference temperature value; the absolute values of the difference values are all larger than a set threshold value within a second set time, and if fault information of a first type of fault is received, the reference temperature value of the cooling water is adopted; the absolute values of the difference values are all larger than a set threshold value within a second set time, if the fault information of the first type of fault is not received, the occurrence of the second type of fault is determined, and the reference temperature value of the cooling water is adopted; the absolute values of the difference values are all larger than a set threshold value within a second set time, if the fault information of the first type of fault is not received, the occurrence of the second type of fault is determined, after the cooling water reference temperature value is adopted, the cooling water temperature value and the cooling water reference temperature value which are acquired by a cooling water temperature sensor are respectively acquired in real time, and the difference value of the cooling water temperature value and the cooling water reference temperature value which are acquired by the cooling water temperature sensor is determined; if the absolute value of the difference is smaller than or equal to a set threshold, respectively obtaining a cooling water temperature value and a cooling water reference temperature value acquired by a cooling water temperature sensor at intervals of a first set time, determining the difference between the cooling water temperature value acquired by the cooling water temperature sensor and the cooling water reference temperature value, and adopting the cooling water temperature value acquired by the cooling water temperature sensor when the absolute value of the difference is smaller than or equal to the set threshold in a third set time.
4. An engine oil temperature determination device, comprising:
the temperature acquisition module is used for searching engine indicated torque in an engine operation parameter table according to the fuel injection quantity and the engine rotating speed, and searching friction torque in the engine operation parameter table according to the engine rotating speed and the initial cooling water temperature; superposing the engine indicated torque and the friction torque, multiplying the superposed torque by the engine rotating speed, and dividing an obtained value by 9550 to obtain engine power; according to the engine power, finding a heat loss coefficient in the engine operation parameter table, and multiplying the heat loss coefficient by the engine power to obtain the heat transferred to a cooling system by the engine; according to the heat quantity transferred to a cooling system by the engine and the rotating speed of the engine, the heat quantity proportion transferred to the engine oil by the engine is searched in the engine operation parameter table, and the heat quantity transferred to the engine oil by the engine is determined according to the heat quantity proportion transferred to the engine oil by the engine; acquiring an ambient temperature through an ambient temperature sensor in an engine, and determining heat transferred to the environment by the engine oil in unit time according to the initial engine oil temperature, the ambient temperature and the heat transfer coefficient between the engine oil and the environment; determining the heat quantity transmitted to the cooling water by the engine oil in unit time according to the initial engine oil temperature, the initial cooling water temperature and the heat transfer coefficient of the engine oil and the cooling water; determining the change rate of the engine oil temperature according to the heat transferred to the environment by the engine oil in unit time, the heat transferred to the cooling water by the engine oil in unit time and the heat transferred to the engine oil by the engine in unit time, and integrating the change rate of the engine oil temperature to determine an engine oil reference temperature value;
the difference value determining module is used for determining the difference value between the engine oil temperature value acquired by the engine oil temperature sensor and the engine oil reference temperature value;
the temperature determining module is used for adopting the engine oil temperature value acquired by the engine oil temperature sensor if the absolute value of the difference value is less than or equal to a set threshold value; if the absolute value of the difference value is larger than a set threshold value, respectively acquiring an engine oil temperature value and an engine oil reference temperature value acquired by an engine oil temperature sensor at intervals of a first set time, and determining the difference value between the engine oil temperature value acquired by the engine oil temperature sensor and the engine oil reference temperature value; the absolute values of the difference values are all larger than a set threshold value within a second set time, and if fault information of a first type of fault is received, the engine oil reference temperature value is adopted; the absolute values of the difference values are all larger than a set threshold value within a second set time, if the fault information of the first type of fault is not received, the second type of fault is determined to occur, and the engine oil reference temperature value is adopted; the absolute values of the difference values are all larger than a set threshold value within a second set time, if the fault information of the first type of fault is not received, the second type of fault is determined to occur, after the engine oil reference temperature value is adopted, an engine oil temperature value and an engine oil reference temperature value which are acquired by an engine oil temperature sensor are respectively acquired in real time, and the difference value of the engine oil temperature value and the engine oil reference temperature value which are acquired by the engine oil temperature sensor is determined; if the absolute value of the difference is smaller than or equal to a set threshold, respectively acquiring an engine oil temperature value and an engine oil reference temperature value acquired by an engine oil temperature sensor at intervals of a first set time, determining the difference between the engine oil temperature value acquired by the engine oil temperature sensor and the engine oil reference temperature value, and adopting the engine oil temperature value acquired by the engine oil temperature sensor when the absolute value of the difference is smaller than or equal to the set threshold in a third set time.
5. A computer-readable storage medium having a computer program stored therein, the computer program characterized by: which computer program, when being executed by a processor, carries out the method of claim 1 or 2.
6. An electronic device, comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, the computer program, when executed by the processor, implementing the method of claim 1 or 2.
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