CN112012841A - Water temperature correction method for engine - Google Patents
Water temperature correction method for engine Download PDFInfo
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- CN112012841A CN112012841A CN201910459376.1A CN201910459376A CN112012841A CN 112012841 A CN112012841 A CN 112012841A CN 201910459376 A CN201910459376 A CN 201910459376A CN 112012841 A CN112012841 A CN 112012841A
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- water temperature
- temperature value
- engine
- starting state
- current water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3005—Details not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
- F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
- F02D2200/501—Vehicle speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
Abstract
The invention provides a water temperature correction method for an engine, wherein the method comprises the following steps: acquiring a current water temperature value when an engine is started; identifying a starting state of the engine at present; and if the starting state is a cold starting state, correcting the current water temperature value according to the vehicle speed-load parameter and/or the environment temperature parameter of the vehicle, and taking the corrected water temperature value as the actual water temperature value of the engine. In the embodiment of the invention, because the problem that the water temperature value detected by the water temperature sensor is inaccurate exists in the cold starting state, the water temperature value detected by the water temperature sensor is corrected based on factors (vehicle speed-load parameters and/or environment temperature parameters) influencing the water temperature in the cold starting state to obtain a more accurate water temperature value, so that the fuel injection amount in the cold starting state can be accurately controlled, the phenomenon of multiple fuel injections can be avoided, the accurate fuel injection of an engine can be realized, and the fuel consumption and the emission in the starting and warming-up stages can be reduced.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a water temperature correction method and device for an engine and electronic equipment.
Background
With increasingly stringent regulations in China, a large number of advanced technologies aiming at improving the fuel economy of the engine and reducing the environmental pollution are widely applied, and the position of a thermal management system as a component part of the engine becomes more important. In the engine starting and warming-up stage, special requirements are provided for the water temperature representation accuracy of the engine.
As shown in figure 1, when the engine works, cooling water directly flows back to the water pump from the cylinder body, flows through the water inlet of the engine and the cylinder cover and then enters the water outlet of the engine. In fig. 1, in order to control the fuel injection amount, the thermal management system needs to calculate the fuel injection amount based on the water temperature detected by the water temperature sensor.
In general, the temperature at the cylinder head is increased by heat conduction. Because the water temperature sensor is installed in the middle of the cylinder cover, the cylinder cover is in a state of almost zero flow, namely the cooling water at the water temperature sensor is basically in a static state, the rising speed of the water temperature at the cylinder cover is slower than the actual water temperature, namely the actual water temperature is higher than the water temperature detected by the water temperature sensor, the actually detected water temperature data detected by the water temperature sensor is distorted, and the data is inaccurate.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first object of the present invention is to provide a water temperature correction method for an engine, so as to solve the problem of inaccurate water temperature detection of the existing water temperature correction method for the engine.
A second object of the present invention is to provide a water temperature correction device for an engine.
A third object of the invention is to propose an engine.
A fourth object of the invention is to propose an electronic device.
A fifth object of the present invention is to propose a computer-readable storage medium.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a water temperature correction method for an engine, including the steps of: acquiring a current water temperature value when an engine is started; identifying a starting state of the engine at present; and if the starting state is a cold starting state, correcting the current water temperature value according to the vehicle speed-load parameter and/or the environment temperature parameter of the vehicle, and taking the corrected water temperature value as the actual water temperature value of the engine.
According to an embodiment of the present invention, the correcting the current water temperature value according to a vehicle speed-load parameter and/or an ambient temperature parameter of a vehicle, and using the corrected water temperature value as an actual water temperature value of the engine, includes: acquiring a correction temperature for correcting the current water temperature value according to the vehicle speed-load parameter, accumulating the correction temperature and the current water temperature value to obtain a first target temperature, and taking the first target temperature as the actual water temperature value; or acquiring a temperature correction coefficient for correcting the current water temperature value according to the environment temperature parameter, multiplying the temperature correction coefficient and the current water temperature value to obtain a second target temperature, and taking the second target temperature as the actual water temperature value; or acquiring a correction temperature for correcting the current water temperature value according to the vehicle speed-load parameter, acquiring a temperature correction coefficient for correcting the current water temperature value according to the environment temperature parameter, correcting the current water temperature value according to the correction temperature and the temperature correction coefficient to obtain a third target temperature, and taking the third target as the actual water temperature value.
According to an embodiment of the present invention, further comprising: and if the starting state is a hot starting state, taking the current water temperature value as the actual water temperature value.
According to one embodiment of the invention, the identifying the current starting state of the engine comprises: comparing the current water temperature value with a preset temperature threshold value, and if the current water temperature value is lower than the temperature threshold value, identifying the starting state as a cold starting state; and if the current water temperature value is greater than or equal to the temperature threshold value, identifying the starting state as a hot starting state.
According to an embodiment of the invention, after obtaining the actual water temperature value of the engine, the method further comprises: and acquiring the oil quantity required to be sprayed by an oil sprayer in the vehicle according to the actual water temperature value, and controlling the oil sprayer to spray fuel oil outwards according to the oil quantity required to be sprayed.
In an embodiment of the first aspect of the present invention, a water temperature correction method for an engine is provided, which may obtain a current water temperature value when the engine is started, identify whether a current starting state of the engine is a cold starting state, correct the current water temperature value according to a vehicle speed-load parameter and/or an ambient temperature parameter of a vehicle if the engine is in the cold starting state, and use the corrected water temperature value as an actual water temperature value of the engine. In the embodiment of the invention, because the water temperature value detected by the water temperature sensor is inaccurate in the cold starting state, the water temperature value detected by the water temperature sensor is corrected based on factors (vehicle speed-load parameters and/or environment temperature parameters) influencing the water temperature in the cold starting state, so that a more accurate water temperature value is obtained.
Furthermore, the fuel injection quantity of the fuel injector is controlled according to the corrected actual water temperature value, so that the fuel injection quantity in a cold starting state can be accurately controlled, the phenomenon of multiple fuel injections can be avoided, the accurate fuel injection of the engine can be realized, and the fuel consumption and the emission in the starting and warming-up stage can be reduced.
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 water temperature acquisition module is used for acquiring a current water temperature value when the engine is started; the state identification module is used for identifying the starting state of the engine at present; and the water temperature correction module is used for correcting the current water temperature value according to the vehicle speed-load parameter and/or the environment temperature parameter of the vehicle and taking the corrected water temperature value as the actual water temperature value of the engine if the starting state is a cold starting state.
According to an embodiment of the invention, the water temperature correction module is further configured to: acquiring a correction temperature for correcting the current water temperature value according to the vehicle speed-load parameter, accumulating the correction temperature and the current water temperature value to obtain a first target temperature, and taking the first target temperature as the actual water temperature value; or acquiring a temperature correction coefficient for correcting the current water temperature value according to the environment temperature parameter, multiplying the temperature correction coefficient and the current water temperature value to obtain a second target temperature, and compiling the second target temperature into the actual water temperature value; or acquiring a correction temperature for correcting the current water temperature value according to the vehicle speed-load parameter, acquiring a temperature correction coefficient for correcting the current water temperature value according to the environment temperature parameter, correcting the current water temperature value according to the correction temperature and the temperature correction coefficient to obtain a third target temperature, and taking the third target as the actual water temperature value.
According to an embodiment of the present invention, the state identification module is further configured to: comparing the current water temperature value with a preset temperature threshold value, and if the current water temperature value is lower than the temperature threshold value, identifying the starting state as a cold starting state; and if the current water temperature value is greater than or equal to the temperature threshold value, identifying the starting state as a hot starting state.
According to an embodiment of the present invention, further comprising: an oil amount control module for: after the actual water temperature value of the engine is obtained, the oil quantity required to be sprayed by an oil sprayer in the vehicle is obtained according to the actual water temperature value, and the oil sprayer is controlled to spray fuel oil outwards according to the oil quantity required to be sprayed.
In a second aspect of the present invention, a water temperature correction apparatus for an engine is provided, which may obtain a current water temperature value when the engine is started, identify whether a current starting state of the engine is a cold starting state, and if the current starting state is the cold starting state, correct the current water temperature value according to a vehicle speed-load parameter and/or an ambient temperature parameter of a vehicle to obtain an actual water temperature value of the engine. In the embodiment of the invention, because the problem that the water temperature value detected by the water temperature sensor is inaccurate exists in the cold starting state, the water temperature value detected by the water temperature sensor is corrected based on factors (vehicle speed-load parameters and/or environment temperature parameters) influencing the water temperature in the cold starting state to obtain a more accurate water temperature value, so that the fuel injection amount in the cold starting state can be accurately controlled, the phenomenon of multiple fuel injections can be avoided, the accurate fuel injection of an engine can be realized, and the fuel consumption and the emission in the starting and warming-up stages can be reduced.
To achieve the above object, an embodiment of a third aspect of the present invention provides an engine, including: the embodiment of the second aspect of the invention provides a water temperature correction device for an engine.
To achieve the above object, a fourth aspect 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 fifth embodiment of the present invention provides a non-transitory computer readable storage medium, having a computer program stored thereon, wherein the computer program is executed by a processor to implement the water temperature correction method for an engine provided by the first embodiment of the present invention.
Additional aspects and advantages 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 foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a control flow diagram of a prior art thermal management system for an engine;
FIG. 2 is a flow chart of a water temperature correction method for an engine according to an embodiment of the present invention;
FIG. 3 is a flow chart of another method for water temperature correction for an engine according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a water temperature correction device for an engine according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an engine according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A water temperature correction method and apparatus for an engine according to an embodiment of the present invention will be described with reference to the accompanying drawings.
The water temperature correction method for the engine provided by the application is suitable for the engine with the heat management function, and in the following embodiment, the engine with the heat management function is taken as an example for description.
Fig. 2 is a flowchart of a water temperature correction method for an engine according to an embodiment of the present invention. As shown in fig. 2, the water temperature correction method for an engine according to the embodiment of the present invention includes the steps of:
s101: and acquiring the current water temperature value when the engine is started.
In order to solve the problem that the water temperature value of the engine collected at present is inaccurate, in the embodiment of the invention, the current water temperature value when the engine is started needs to be obtained firstly. Specifically, it is possible to refer to the prior art, and obtain the current water temperature value at the time of engine start by a water temperature sensor provided at a middle position of a cylinder head. When the vehicle engine is started, the water temperature sensor shown in figure 1 can be controlled to acquire the current water temperature value when the engine is started. For example, the engine ECU controls the water temperature sensor to acquire the current water temperature value.
S102: the current starting state of the engine is identified.
Wherein the starting state of the engine includes: a cold start state and a hot start state.
Specifically, in the embodiment of the present invention, a temperature threshold value, which is a critical temperature value for identifying whether the engine is in a cold start state or a hot start state, may be set for the engine in advance. It should be noted that the temperature threshold may be set according to the model of the engine. For example, in the starting and warming-up stage of the initial use of the engine, the engine model information may be sent to a background server, and the temperature threshold value may be acquired from the background server.
Further, comparing the acquired current water temperature value when the engine is started with a preset temperature threshold, and if the current water temperature value is lower than the temperature threshold, identifying that the starting state of the engine is a cold starting state; and if the current water temperature value is greater than or equal to the temperature threshold value, identifying the starting state of the engine as a hot starting state.
S103: and if the starting state is a cold starting state, correcting the current water temperature value according to the vehicle speed-load parameter and/or the environment temperature parameter of the vehicle, and taking the corrected water temperature value as the actual water temperature value of the engine.
Specifically, the vehicle speed-load parameter may include a vehicle speed and an engine load, and the ambient temperature parameter may include an ambient temperature value.
When the engine works in a cold starting state, cooling water directly flows back to the water pump from the cylinder body, the water temperature sensor is located in the middle of the cylinder cover where the cooling water is static, the temperature of the cylinder cover side rises to the sensor through heat conduction, and the rising speed of the measured temperature is slow. In fact, the engine operates with a fast temperature rise of the operating water around the combustion chamber due to the thermal management system. The value of the water temperature sensor cannot represent the actual water temperature value, is lower than the actual water temperature value, and needs to be corrected to fit the actual water temperature value.
From the above, the factors affecting the engine water temperature include: vehicle speed, load parameters, and ambient temperature parameters. The vehicle speed and the environmental temperature parameters influence the heat dissipation of the cooling water, and the load parameters influence the temperature rise of the cooling water. The load parameter may be determined from engine speed and torque, among other things. Therefore, the water temperature correction strategy of the engine provided by the application can correct the measured value according to the vehicle speed and the load parameter on the basis of the measured value of the water temperature sensor, and further obtains the environment temperature correction coefficient according to the environment temperature parameter to further correct the corrected measured value so as to obtain the actual water temperature value of the engine.
As a possible implementation manner, the faster the vehicle speed is, the stronger the gas flow is, the greater the heat dissipation loss is, the adverse effect on the water temperature rise is, and the larger the load parameter is, the correspondingly higher the cooling water temperature is, so a three-dimensional correction model between the vehicle speed and the load parameter and the temperature can be constructed in advance, a correction temperature for correcting the current water temperature value is obtained based on the vehicle speed, the correction temperature and the current water temperature value are accumulated to obtain a first target temperature, and the first target temperature is taken as an actual water temperature value.
Specifically, when the engine works in a cold starting state, the speed of the vehicle is high, the air flow in an engine cabin is strong, the heat dissipation loss is large, and the water temperature is not favorably increased; at the time of starting, the larger the vehicle load is, the faster the cooling water temperature rises correspondingly, the higher the temperature is, and the vehicle load can be determined according to the engine speed and the torque. However, whether the water temperature is increased or not is facilitated, the water temperature has strong correlation with the vehicle speed-load parameter, and a three-dimensional correction model between the vehicle speed-load parameter and the water temperature is established, so that the current water temperature value measured by the water temperature sensor can be corrected based on the three-dimensional correction model, and the actual water temperature value of the engine is obtained. The established three-dimensional correction model of the vehicle speed, the load parameters and the temperature can adopt a mode of improving the accuracy of the model according to the actual situation. For example, the accuracy of the model can be improved by real vehicle calibration.
As another possible implementation manner, the lower the ambient temperature is, the more the heat of the engine is dissipated into the environment, the lower the water temperature should be accordingly, so that an ambient temperature parameter-temperature two-dimensional correction model may be pre-constructed, a temperature correction coefficient for correcting the current water temperature value is obtained, the temperature correction coefficient is multiplied by the current water temperature value to obtain a second target temperature, and the second target temperature is used as the actual water temperature value.
Specifically, when the engine is operated in the cold start state, the lower the ambient temperature is, the more heat is radiated to the environment, the slower the cooling water temperature rises, and conversely, the faster the cooling water temperature rises. Therefore, the current water temperature value measured by the water temperature sensor can be corrected based on the two-dimensional model, and the actual water temperature value of the engine can be obtained. The temperature correction coefficient can adopt a mode of improving the accuracy thereof according to the actual situation. The accuracy of this coefficient can be refined, for example, by actual ambient temperature testing.
It should be noted that an ambient temperature sensor is disposed on the vehicle, and the ambient temperature sensor converts the ambient temperature into an electrical signal and inputs the electrical signal to an Electronic Control Unit (ECU) to provide the ambient temperature outside the vehicle.
As another possible implementation manner, the current water temperature value may be corrected based on the vehicle speed-load parameter and the ambient temperature parameter, specifically, the current water temperature value may be corrected once according to the vehicle speed-load parameter, that is, a corrected temperature is obtained according to the vehicle speed-load parameter, then a temperature correction coefficient for correcting the current water temperature value is obtained according to the ambient temperature parameter, then secondary correction is performed based on the ambient temperature, specifically, the temperature correction coefficient is obtained, and finally, the correction coefficient and the corrected temperature are multiplied to obtain a third target temperature, and the third target temperature is used as the actual water temperature value.
Further, the oil quantity required to be injected by the matched oil injector can be selected according to the actual water temperature value of the engine, and the oil injector is controlled to inject fuel outwards according to the oil quantity required to be injected.
The above-described strategy for correcting the water temperature of the engine is applied only to the case where the current state of the engine is the cold start state, and when the engine is in the hot start state, the current water temperature value of the engine may be directly used as the actual water temperature value of the engine without correcting the water temperature.
Further, the oil quantity required to be injected by the matched oil injector can be selected according to the current water temperature value of the engine, and the oil injector is controlled to inject fuel outwards according to the oil quantity required to be injected.
In order to implement the above embodiment, as shown in fig. 3, the present invention provides a flowchart of another water temperature correction method for an engine, including the steps of:
s201: warm-up is started.
S202: and acquiring a current water temperature value.
S203: and judging whether the current water temperature value is smaller than the temperature threshold value.
If the current water temperature value is greater than or equal to the temperature threshold, S204 and S206 are performed. If the current water temperature value is less than the temperature threshold, S205 and S207 are performed.
S204: a warm start condition is identified.
S206: and taking the current water temperature value as an actual water temperature value.
S205: a cold start condition is identified.
S207: and correcting the current water temperature value, and taking the corrected water temperature value as a corrected actual water temperature value.
Specifically, after the current temperature value at the time of engine starting is acquired, it is determined whether the current water temperature value is smaller than the temperature threshold value by executing S203 to identify the starting state of the engine at present.
When it is recognized that the starting state of the engine is the hot start state, S206 is executed to take the current water temperature value as the actual water temperature value. And further, the oil quantity required to be injected by the oil injector is matched based on the current water temperature value.
And when the current starting state of the engine is a cold starting state, S207 is executed to correct the current water temperature value, and the corrected water temperature value is used as the actual water temperature value. And further, the oil quantity required to be injected by the oil injector is matched based on the corrected water temperature value.
In the embodiment of the invention, the starting state of the engine can be determined based on the preset temperature threshold, and the water temperature value is corrected by a software algorithm in the cold starting state, so that the hardware configuration of the engine is not required to be increased, the cost of the engine is reduced, and the resource waste is greatly reduced.
In order to realize the embodiment, the invention also provides a water temperature correction device for the engine.
Fig. 4 is a schematic structural view of a water temperature correction device for an engine according to an embodiment of the present invention. As shown in fig. 4, a water temperature correction device 100 for an engine according to an embodiment of the present invention includes: the system comprises a water temperature acquisition module 11, a state identification module 12 and a water temperature correction module 13.
The water temperature acquisition module 11 is used for acquiring a current water temperature value when the engine is started; the state identification module 12 is used for identifying the starting state of the engine at present; and the water temperature correction module 13 is used for correcting the current water temperature value according to the vehicle speed-load parameter and/or the environment temperature parameter of the vehicle and taking the corrected water temperature value as the actual water temperature value of the engine if the starting state is the cold starting state.
Further, the water temperature correction module 13 is further configured to: acquiring a correction temperature for correcting the current water temperature value according to the vehicle speed-load parameter, accumulating the correction temperature and the current water temperature value to obtain a first target temperature, and taking the first target temperature as an actual water temperature value; or acquiring a temperature correction coefficient for correcting the current water temperature value according to the environment temperature parameter, multiplying the temperature correction coefficient and the current water temperature value to obtain a second target temperature, and taking the second target temperature as the actual water temperature value; or acquiring a correction temperature for correcting the current water temperature value according to the vehicle speed-load parameter, acquiring a temperature correction coefficient for correcting the current water temperature value according to the environment temperature parameter, correcting the current water temperature value according to the correction temperature and the temperature correction coefficient to obtain a third target temperature, and taking the third target as the actual water temperature value.
Further, the state identification module 12 is further configured to: comparing the current water temperature value with a preset temperature threshold, and identifying the starting state as a cold starting state if the current water temperature value is lower than the temperature threshold; and if the current water temperature value is greater than or equal to the temperature threshold value, identifying the starting state as a hot starting state.
Further, an oil amount control module 14 for: after the actual water temperature value of the engine is obtained, the oil quantity required to be sprayed by an oil sprayer in the vehicle is obtained according to the actual water temperature value, and the oil sprayer is controlled to spray fuel outwards according to the oil quantity required to be sprayed.
It should be noted that the foregoing explanation of the embodiment of the water temperature correction method for an engine is also applicable to the water temperature correction device for an engine of the present embodiment, and will not be described herein again.
The water temperature correction device for the engine provided by the embodiment of the invention can acquire the current water temperature value when the engine is started, identify whether the current starting state of the engine is a cold starting state or not, correct the current water temperature value according to the vehicle speed-load parameter and/or the environment temperature parameter of the vehicle if the engine is in the cold starting state, and take the corrected water temperature value as the actual water temperature value of the engine. In the embodiment of the invention, because the water temperature detected by the water temperature sensor is inaccurate in the cold starting state, the water temperature value detected by the water temperature sensor is corrected based on factors (vehicle speed-load parameters and/or environment temperature parameters) influencing the water temperature in the cold starting state to obtain a more accurate water temperature value, so that the fuel injection amount in the cold starting state can be accurately controlled, the phenomenon of multiple fuel injections can be avoided, the accurate fuel injection of an engine can be realized, and the fuel consumption and the emission in the starting and warming-up stage can be reduced.
In order to implement the above embodiment, the present invention further provides an engine 200, as shown in fig. 5, including a water temperature correction device 100 for an engine, implementing the water temperature correction method for an engine.
In order to implement the above embodiment, the present invention further provides an electronic device 300, as shown in fig. 6, including a memory 31, a processor 32 and a computer program stored in the memory and running on the processor, wherein when the processor executes the computer program, the method for correcting the water temperature of the engine is implemented.
In order to achieve the above embodiments, the present invention also proposes a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the aforementioned water temperature correction method for an engine.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A water temperature correction method for an engine, characterized by comprising:
acquiring a current water temperature value when an engine is started;
identifying a starting state of the engine at present; and if the starting state is a cold starting state, correcting the current water temperature value according to the vehicle speed-load parameter and/or the environment temperature parameter of the vehicle, and taking the corrected water temperature value as the actual water temperature value of the engine.
2. The method according to claim 1, wherein the correcting the current water temperature value according to a vehicle speed-load parameter and/or an ambient temperature parameter of a vehicle and taking the corrected water temperature value as an actual water temperature value of the engine comprises:
acquiring a correction temperature for correcting the current water temperature value according to the vehicle speed-load parameter, accumulating the correction temperature and the current water temperature value to obtain a first target temperature, and taking the first target temperature as the actual water temperature value; or the like, or, alternatively,
acquiring a temperature correction coefficient for correcting the current water temperature value according to the environment temperature parameter, multiplying the temperature correction coefficient and the current water temperature value to obtain a second target temperature, and taking the second target temperature as the actual water temperature value; or the like, or, alternatively,
and acquiring a correction temperature for correcting the current water temperature value according to the vehicle speed-load parameter, acquiring a temperature correction coefficient for correcting the current water temperature value according to the environment temperature parameter, correcting the current water temperature value according to the correction temperature and the temperature correction coefficient to obtain a third target temperature, and taking the third target as the actual water temperature value.
3. The method of claim 1, further comprising:
and if the starting state is a hot starting state, taking the current water temperature value as the actual water temperature value.
4. The method of claim 3, wherein said identifying a starting state in which the engine is currently located comprises:
comparing the current water temperature value with a preset temperature threshold value, and if the current water temperature value is lower than the temperature threshold value, identifying the starting state as a cold starting state;
and if the current water temperature value is greater than or equal to the temperature threshold value, identifying the starting state as a hot starting state.
5. The method according to any one of claims 1-4, wherein after said obtaining an actual water temperature value for said engine, further comprising:
and acquiring the oil quantity required to be sprayed by an oil sprayer in the vehicle according to the actual water temperature value, and controlling the oil sprayer to spray fuel oil outwards according to the oil quantity required to be sprayed.
6. A water temperature correction device for an engine, characterized by comprising:
the water temperature acquisition module is used for acquiring a current water temperature value when the engine is started;
the state identification module is used for identifying the starting state of the engine at present;
and the water temperature correction module is used for correcting the current water temperature value according to the vehicle speed-load parameter and/or the environment temperature parameter of the vehicle and taking the corrected water temperature value as the actual water temperature value of the engine if the starting state is a cold starting state.
7. The apparatus of claim 6, wherein the water temperature modification module is further configured to:
acquiring a correction temperature for correcting the current water temperature value according to the vehicle speed-load parameter, accumulating the correction temperature and the current water temperature value to obtain a first target temperature, and taking the first target temperature as the actual water temperature value; or the like, or, alternatively,
acquiring a temperature correction coefficient for correcting the current water temperature value according to the environment temperature parameter, multiplying the temperature correction coefficient and the current water temperature value to obtain a second target temperature, and taking the second target temperature as the actual water temperature value; or the like, or, alternatively,
and acquiring a correction temperature for correcting the current water temperature value according to the vehicle speed-load parameter, acquiring a temperature correction coefficient for correcting the current water temperature value according to the environment temperature parameter, correcting the current water temperature value according to the correction temperature and the temperature correction coefficient to obtain a third target temperature, and taking the third target as the actual water temperature value.
8. The apparatus of claim 6, wherein the status identification module is further configured to:
comparing the current water temperature value with a preset temperature threshold value, and if the current water temperature value is lower than the temperature threshold value, identifying the starting state as a cold starting state;
and if the current water temperature value is greater than or equal to the temperature threshold value, identifying the starting state as a hot starting state.
9. The apparatus of any of claims 6-8, further comprising:
an oil amount control module for:
after the actual water temperature value of the engine is obtained, the oil quantity required to be sprayed by an oil sprayer in the vehicle is obtained according to the actual water temperature value, and the oil sprayer is controlled to spray fuel oil outwards according to the oil quantity required to be sprayed.
10. An electronic device comprising 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 for implementing the water temperature correction method for an engine according to any one of claims 1 to 4.
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