CN115949537A - Control method and device of fuel preheating system and vehicle - Google Patents
Control method and device of fuel preheating system and vehicle Download PDFInfo
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- CN115949537A CN115949537A CN202310024672.5A CN202310024672A CN115949537A CN 115949537 A CN115949537 A CN 115949537A CN 202310024672 A CN202310024672 A CN 202310024672A CN 115949537 A CN115949537 A CN 115949537A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 287
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000295 fuel oil Substances 0.000 claims 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 76
- 239000003502 gasoline Substances 0.000 abstract description 15
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
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- 239000004148 curcumin Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
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Abstract
The invention provides a control method and a control device of a fuel preheating system and a vehicle, wherein the method comprises the following steps: acquiring outdoor environment temperature and water temperature of an engine; when the outdoor environment temperature is lower than a preset outdoor temperature threshold and the water temperature of the engine is lower than a preset engine temperature threshold, controlling the fuel preheating system to start; determining actual heating power and actual heating time; and controlling the fuel preheating system to operate according to the preset heating target temperature, the actual heating power and the actual heating time so as to preheat the fuel. The invention solves the problem that the engine is difficult to cold start when the ethanol content of the gasoline is higher and the environmental temperature is lower, thereby ensuring that the engine can be suitable for oil products with various ethanol proportions and improving the success rate of cold start of the engine.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a control method and device of a fuel preheating system and a vehicle.
Background
With the advance of energy conservation and emission reduction, ethanol gasoline is adopted in some areas, because the chemical property and the physical property of ethanol fuel are different from those of the traditional gasoline fuel, the low-temperature evaporation capacity of ethanol is poor, and when the content of ethanol in the gasoline is gradually increased, the phenomenon that the engine is difficult to start at a low ambient temperature can occur.
At present, fuel types are divided into a plurality of types, engine benches and finished vehicles are needed to be verified aiming at different fuel types in the same region, oil products with different ethanol ratios such as E22, E27, E61 and E100 exist in partial regions such as Brazilian regions, and in order to reduce the types of the engines, the engines suitable for the oil products with the various ethanol ratios need to be developed, but the engines still have the problem of difficult starting aiming at outdoor low-temperature environments.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
Therefore, one objective of the present invention is to provide a control method for a fuel preheating system, which solves the problem that the engine is difficult to cold start when the ethanol content of gasoline is high and the ambient temperature is low, so as to ensure that the engine can be suitable for oil products with various ethanol ratios, and improve the success rate of cold start of the engine.
To this end, a second object of the present invention is to provide a control device for a fuel preheating system.
To this end, a third object of the invention is to propose a vehicle.
In order to achieve the above object, an embodiment of a first aspect of the present invention proposes a control method of a fuel preheating system, including: acquiring the outdoor ambient temperature and the water temperature of an engine; when the outdoor environment temperature is lower than a preset outdoor temperature threshold value and the water temperature of the engine is lower than a preset engine temperature threshold value, controlling the fuel preheating system to start; determining actual heating power and actual heating time; and controlling the fuel preheating system to operate according to a preset heating target temperature, an actual heating power and the actual heating time so as to preheat the fuel.
According to the control method of the fuel preheating system, the fuel preheating system is arranged on the engine, when the outdoor environment temperature is lower than the preset outdoor temperature threshold value and the water temperature of the engine is lower than the preset engine temperature threshold value, the fuel preheating system is controlled to be started to preheat the fuel in the oil way, so that the fuel temperature can reach the preset heating target temperature when the engine is normally started, the problem that the engine is difficult to cold start when the content of gasoline ethanol is high and the environment temperature is low is solved, the engine can be suitable for oil products with various ethanol ratios, and the success rate of cold start of the engine is improved.
In some embodiments, determining the actual heating power and the actual heating time comprises: acquiring a fuel signal and a voltage and electric quantity signal of a storage battery; and determining the actual heating power and the actual heating time according to the fuel signal and the voltage electric quantity signal.
In some embodiments, determining the actual heating power and the actual heating time from the fuel signal and the voltage charge signal comprises: determining a fuel base temperature and a fuel concentration from the fuel signal; determining heating heat according to the fuel basic temperature, the preset heating target temperature and the fuel concentration; and determining the actual heating power and the actual heating time according to the heating heat and the voltage electric quantity signal.
In some embodiments, after controlling the fuel preheating system to preheat the fuel, the method further includes: judging whether the engine can be started normally; if so, determining that the heating temperature of the fuel preheating system meets the preset heating target temperature, otherwise, correcting the preset heating target temperature.
In some embodiments, the correcting the preset heating target temperature includes: and correcting the preset heating target temperature according to a preset temperature threshold until the engine can be normally started.
In some embodiments, the engine failing to start normally comprises: the engine runs and the starting rotating speed of the engine is lower than a preset rotating speed, and/or the emission of the engine after the engine is started is lower than a preset emission threshold.
In some embodiments, controlling the fuel preheating system to operate according to the preset heating target temperature, the actual heating power and the actual heating time to preheat the fuel comprises: determining target heating power according to the preset heating target temperature; calculating a difference value between the actual heating power and the target heating power; and adjusting the actual heating power and the actual heating time according to the difference value, and controlling the fuel preheating system to operate according to the adjusted actual heating power and the adjusted actual heating time so as to preheat the fuel.
In some embodiments, after controlling the operation of the fuel preheating system according to the adjusted actual heating power and the adjusted actual heating time, the method further includes: after the fuel preheating time reaches the adjusted actual heating time and the fuel preheating power reaches the adjusted actual heating power, controlling the fuel preheating system to stop preheating the fuel, determining that the preheating is completed, and sending a preheating completion reminding message after determining that the preheating is completed.
In order to achieve the above object, an embodiment of a second aspect of the present invention proposes a control device of a fuel preheating system, including: the acquisition module is used for acquiring the outdoor environment temperature and the water temperature of the engine; the control module is used for controlling the fuel preheating system to start when the outdoor environment temperature is lower than a preset outdoor temperature threshold and the water temperature of the engine is lower than a preset engine temperature threshold; the determining module is used for determining the actual heating power and the actual heating time; and the heating module is used for controlling the fuel preheating system to operate according to a preset heating target temperature, actual heating power and actual heating time so as to preheat the fuel.
According to the control device of the fuel preheating system, the fuel preheating system is arranged on the engine, when the outdoor environment temperature is lower than the preset outdoor temperature threshold value and the water temperature of the engine is lower than the preset engine temperature threshold value, the fuel preheating system is controlled to be started to preheat the fuel in the oil way, so that the fuel temperature can reach the preset heating target temperature when the engine is normally started, the problem that the engine is difficult to cold start when the content of gasoline ethanol is high and the environment temperature is low is solved, the engine can be suitable for oil products with various ethanol ratios, and the success rate of cold start of the engine is improved.
In order to achieve the above object, an embodiment of a third aspect of the invention proposes a vehicle including: an engine; the heating fuel rail is connected with the engine, and a heating assembly is arranged on the heating fuel rail and used for preheating the fuel. The high-pressure nozzle is connected with the heating fuel guide rail and used for supplying air to the engine; the control device of the fuel preheating system according to the above embodiment is used for controlling the fuel preheating system to operate according to a preset heating target temperature, an actual heating power and an actual heating time so as to preheat the fuel.
According to the vehicle provided by the embodiment of the invention, the fuel preheating system is arranged on the engine, when the outdoor environment temperature is lower than the preset outdoor temperature threshold and the water temperature of the engine is lower than the preset engine temperature threshold, the fuel preheating system is controlled to be started to preheat the fuel in the oil way, so that the fuel temperature can reach the preset heating target temperature when the engine is normally started, the problem that the engine is difficult to cold start when the content of gasoline and ethanol is higher and the environment temperature is lower is solved, the engine can be ensured to be suitable for oil products with various ethanol ratios, and the success rate of cold start of the engine is improved.
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 above 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 schematic diagram of the operation of a fuel preheating system according to one embodiment of the invention;
FIG. 2 is a flow chart of a control method of the fuel preheating system according to an embodiment of the invention;
FIG. 3 is a hardware block diagram of a heated fuel rail according to one embodiment of the present invention;
FIG. 4 is a flowchart of a control method of a fuel preheating system according to another embodiment of the invention;
FIG. 5 is a block diagram of a control arrangement of the fuel preheating system according to an embodiment of the present invention;
FIG. 6 is a block diagram of a vehicle with a fuel preheating system according to one embodiment of the present invention.
Reference numerals are as follows: a heating assembly 41; a control device 2 of the fuel preheating system; an acquisition module 21; a control module 22; a determination module 23; a heating module 24; a vehicle 3; an engine 31; heating fuel rail 32; a high pressure nozzle 33.
Detailed Description
Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.
When facing to an engine suitable for oil products with various ethanol ratios, namely an elastic fuel engine, the engine has the difficulties of corrosion resistance and low-temperature cold start, the corrosion resistance of the engine is improved by changing materials or adding a coating, but the low-temperature evaporation capacity of the ethanol is poor, so that the low-temperature cold start of the engine is difficult.
Therefore, the invention solves the problem of difficult low-temperature cold start of the engine by arranging the fuel preheating system to heat the fuel in the ethanol gasoline engine.
The operation of the fuel preheating system according to the embodiment of the present invention will be described first, and as shown in fig. 1, the present invention mainly uses an engine control unit, a heating controller, a fuel sensor, a heating fuel rail, an ambient temperature sensor, a water temperature sensor, a relay, and a battery to heat fuel, wherein,
the engine Control Unit is, for example, written as an ECU (Electronic Control Unit), and after the entire vehicle is powered on, obtains parameter information such as an outdoor ambient temperature, an engine water temperature, a fuel sensor signal, and an electric quantity of the battery, calculates an actual heating power and an actual heating time required when the engine is started according to the parameter information, and sends the actual heating power and the actual heating time to the heating controller, and the heating controller feeds back the actual heating power to the engine Control Unit, which performs closed-loop Control on the actual heating power.
The heating controller is connected with the heating fuel guide rail, and controls the heating fuel guide rail to heat the fuel when the outdoor environment temperature and the water temperature of the engine meet the starting requirement of the fuel preheating system.
The relay is connected with the storage battery, the opening and closing state of the relay is controlled by the engine control unit, when the engine control unit controls the relay to be switched on, the heating controller controls high current to drive the heating plug on the fuel rail to heat fuel until actual heating power and actual heating time are reached, the engine control unit controls the relay to be switched off, and at the moment, fuel heating is considered to be completed.
Based on the operation of the fuel preheating system, the control method of the fuel preheating system according to the embodiment of the present invention is illustrated with reference to fig. 1 to 4.
As shown in fig. 2, the control method of the fuel preheating system of the embodiment of the invention includes at least steps S1 to S4.
And S1, acquiring the outdoor environment temperature and the water temperature of the engine.
The outdoor environment temperature is obtained through real-time measurement of an environment temperature sensor, signals of the environment temperature sensor are transmitted to the engine control unit after the outdoor environment temperature is obtained, water temperature of the engine is obtained through real-time measurement of a water temperature sensor, and signals of the water temperature of the engine are transmitted to the engine control unit after the water temperature of the engine is obtained.
In an embodiment, after the whole vehicle is powered on, the engine control unit acquires an ambient temperature sensor signal sent by an ambient temperature sensor in real time through the whole vehicle CAN (Controller Area Network) communication, and simultaneously acquires an engine water temperature signal sent by a water temperature sensor in real time, and by acquiring the outdoor ambient temperature and the water temperature of the engine, whether the fuel preheating system needs to be started to heat the fuel is conveniently judged.
And S2, controlling the fuel preheating system to start when the outdoor environment temperature is lower than a preset outdoor temperature threshold and the water temperature of the engine is lower than a preset engine temperature threshold.
In an embodiment, after the outdoor environment temperature and the water temperature of the engine are obtained, the outdoor environment temperature and the water temperature of the engine are analyzed, and when the outdoor environment temperature is lower than a preset outdoor temperature threshold, for example, lower than 15 ℃, and at the same time, the water temperature of the engine is lower than a preset engine temperature threshold, the outdoor environment temperature and the water temperature of the engine are considered to meet the preheating condition, the fuel preheating system is controlled to be started, and the fuel in the engine, for example, ethanol fuel, is heated.
And if the outdoor ambient temperature is higher than a preset outdoor threshold value, such as higher than 15 ℃, or the water temperature of the engine is higher than a preset engine temperature threshold value, or the outdoor ambient temperature is higher than the preset outdoor threshold value and the water temperature of the engine is higher than the preset engine temperature threshold value, controlling the fuel preheating system not to be started. It should be noted that the engine control unit may adjust the preset outdoor temperature threshold according to the actual usage scenario of the vehicle, and the adjustment range is generally between-10 ℃ and 30 ℃. By comparing the magnitude relations between the outdoor environment temperature and the preset outdoor temperature threshold value and between the water temperature of the engine and the preset engine temperature threshold value, the fuel preheating system is controlled to be started conveniently when the outdoor environment temperature and the water temperature of the engine meet the preheating condition, so that the problem that the engine is difficult to start when the ethanol content is increased and the outdoor environment temperature is low is solved.
And S3, determining the actual heating power and the actual heating time.
In the embodiment, the actual heating power and the actual heating time of the storage battery are different according to the using scenes, and also have difference, when the fuel preheating system is started, the engine control unit acquires a fuel signal such as an ethanol fuel sensor signal and a voltage and electricity signal of the storage battery through the vehicle CAN communication, determines the actual heating power and the actual heating time according to the fuel signal and the voltage and electricity signal, and controls the heating controller to work according to the actual heating power and the actual heating time by determining the actual heating power and the actual heating time, so that the heating controller CAN feed the actual heating power back to the engine control unit in the working process to realize the closed-loop control inside the engine, and the heating control of the heating controller is more accurate.
And S4, controlling the fuel preheating system to operate according to the preset heating target temperature, the actual heating power and the actual heating time so as to preheat the fuel.
Wherein, preheat the fuel through the fuel system of preheating, can preheat the fuel in the oil circuit to when avoiding ethanol content in the fuel higher, the engine start difficulty's that outdoor ambient temperature is lower to lead to problem, thereby make the engine can be suitable for multiple ethanol content oil.
For example, as shown in fig. 3, a hardware structure diagram of a heated fuel rail according to an embodiment of the present invention is shown. Be provided with heating element 41 on the heating fuel rail, heat fuel through heating element 41 to inject and participate in the burning with air mixture in air flue or the cylinder body, realize the heating to fuel, can effectively reduce the calorific loss of fuel supply in-process, thereby realize that the engine can start fast when ambient temperature is lower.
In an embodiment, the preset heating target temperature may be determined according to a usage scenario, where the current usage scenario is different, and the corresponding preset heating target temperature is different, for example, set to 25 ℃.
After the preset heating target temperature, the actual heating power and the actual heating time are obtained, the actual heating power and the actual heating time are adjusted by taking the preset heating target temperature as a reference, so that the fuel is preheated, and the success rate of starting the engine at a low outdoor temperature is improved.
According to the control method of the fuel preheating system, the fuel preheating system is arranged on the engine, when the outdoor environment temperature is lower than the preset outdoor temperature threshold value and the water temperature of the engine is lower than the preset engine temperature threshold value, the fuel preheating system is controlled to be started to preheat the fuel in the oil way, so that the fuel temperature can reach the preset heating target temperature when the engine is normally started, the problem that the engine is difficult to cold start when the content of gasoline ethanol is high and the environment temperature is low is solved, the engine can be suitable for oil products with various ethanol ratios, and the success rate of cold start of the engine is improved.
In some embodiments, when the actual heating power and the actual heating time are determined according to the fuel signal and the voltage electric quantity signal, the fuel base temperature and the fuel concentration are determined according to the fuel signal; determining heating heat according to the basic fuel temperature, the preset heating target temperature and the fuel concentration; and determining the actual heating power and the actual heating time according to the heating heat and the voltage electric quantity signals.
In an embodiment, the fuel sensor may be disposed near an oil inlet pipe of the oil rail, and if the disposition space is insufficient, the fuel sensor may be disposed near an oil outlet on the fuel tank. The fuel sensor is used for monitoring the ethanol content of the fuel in the low-pressure oil way and feeding back the ethanol content to the engine control unit.
The engine control unit obtains a fuel signal sent by a fuel sensor through vehicle CAN communication, determines a fuel base temperature, such as the base temperature of ethanol gasoline, and a fuel concentration, such as the ethanol content, and determines the heating heat according to the fuel base temperature, the fuel concentration and a preset heating target temperature after determining the fuel base temperature and the fuel concentration.
The formula for calculating the heating heat quantity is Q = cm Δ T, where Q is the heat quantity required for heating, c is the specific heat capacity, m is the mass, Δ T = preset heating target temperature — fuel base temperature, and the heating heat quantity can be obtained by substituting the fuel base temperature, the fuel concentration, and the preset heating target temperature into the above formula.
After the heating quantity is determined, the actual heating power and the actual heating time are calculated according to the heating quantity and the voltage electric quantity signal of the storage battery, for example, when the actual heating power is determined to be 200w, the actual heating time under the voltage electric quantity of 10V is 120s, heating is completed according to the actual heating power and the actual heating time, and the engine is started after heating is completed. The fuel is heated by acquiring the fuel signal, the voltage and electric quantity signal of the storage battery and the preset heating target temperature and calculating the actual heating power and the actual heating time, so that the temperature of the fuel can reach the preset heating target temperature, and the success rate of starting the engine is improved.
In some embodiments, after controlling the fuel preheating system to preheat the fuel, judging whether the engine can be started normally; if so, determining that the heating temperature of the fuel preheating system meets the preset heating target temperature, and otherwise, correcting the preset heating target temperature.
In the embodiment, after the fuel preheating system is controlled to preheat the fuel, whether the engine can be normally started is judged, if the engine can be normally started, the heating temperature of the fuel preheating system is considered to reach the preset heating target temperature, and the preset heating target temperature does not need to be adjusted; if the engine cannot be normally started, the heating temperature of the fuel system is considered to be incapable of reaching the preset heating target temperature, the preset heating target temperature cannot meet the temperature required by normal starting of the engine, and the engine cannot be normally started.
In some embodiments, when the preset heating target temperature is corrected, the preset heating target temperature is corrected according to a preset temperature threshold until the engine can be normally started.
In an embodiment, when the engine cannot be normally started, the preset heating target temperature is corrected, for example, a preset temperature threshold is added to the preset heating target temperature to correct the preset heating target temperature, and after the preset heating target temperature is corrected, whether the engine can be normally started is judged again, if the engine can be normally started, it is determined that the heating temperature of the fuel preheating system can meet the preset heating target temperature, and if the engine cannot be normally started, the preset heating target temperature is continuously corrected until the engine can be started.
In some embodiments, when the engine cannot be normally started, if the engine is running and the starting speed of the engine is lower than the preset speed, and/or the emission amount of the engine after running and starting the engine is lower than the preset emission amount threshold.
In the embodiment, if the transmitter runs but the starting rotating speed of the engine is lower than the preset rotating speed, the engine cannot be normally started; if the transmitter operates but the emission after the engine is started is lower than the preset emission threshold, the engine cannot be normally started, or if the transmitter operates but the starting rotating speed of the engine is lower than the preset rotating speed and the emission after the engine is started is lower than the preset emission threshold, the engine cannot be normally started.
In some embodiments, the fuel preheating system is controlled to operate according to a preset heating target temperature, an actual heating power and an actual heating time, so that when the fuel is preheated, the target heating power is determined according to the preset heating target temperature; calculating the difference value between the actual heating power and the target heating power; and adjusting the actual heating power and the actual heating time according to the difference value, and controlling the fuel preheating system to operate according to the adjusted actual heating power and the adjusted actual heating time so as to preheat the fuel.
In the embodiment, after the preset heating target temperature, the actual heating power and the actual heating time are determined, the target heating power is determined according to the preset heating target temperature, the actual heating power is adjusted by taking the target heating power as a reference, so that the closed-loop control of the actual heating power is realized, and the accuracy of the heating control of the heating controller can be improved by performing the closed-loop control on the actual heating power.
In some embodiments, after the fuel preheating system is controlled to operate according to the adjusted actual heating power and the adjusted actual heating time, after the fuel preheating time reaches the adjusted actual heating time and the fuel preheating power reaches the adjusted actual heating power, the fuel preheating system is controlled to stop preheating the fuel, preheating completion is determined, and after it is determined that preheating is completed, a warning message of preheating completion is sent.
In the embodiment, after the fuel preheating system is controlled to operate according to the adjusted actual heating power and the adjusted actual heating time, if the fuel preheating time reaches the actual heating time and the fuel preheating power reaches the actual heating power, the engine control unit controls the relay to disconnect the high current, the fuel preheating is controlled to be completed, after the preheating of the engine is determined to be completed, the reminding information of the completion of the preheating is sent, the engine is controlled not to be preheated, the reminding information of starting the vehicle when the preheating is completed is displayed on the instrument, and the user can be reminded of the completion of the fuel heating by sending the reminding information of the completion of the preheating so as to perform subsequent operations.
A control method of the fuel preheating system of the embodiment of the invention is exemplified below with reference to fig. 4.
Fig. 4 is a flowchart of a control method of the fuel preheating system according to another embodiment of the present invention.
And step S11, acquiring the outdoor environment temperature and the water temperature of the engine.
Step S12, judging whether the outdoor environment temperature and the engine water temperature meet the preheating condition, if so, executing step S13; if not, go to step S14.
Step S13, the fuel preheating system operates. In step S14, the fuel preheating system is not operated.
Step S15, determining the basic temperature and the concentration of the fuel according to the fuel signal; determining heating heat according to the basic fuel temperature, the preset heating target temperature and the fuel concentration; and determining the actual heating power and the actual heating time according to the heating heat and the voltage electric quantity signals.
And S16, controlling the fuel preheating system to run according to the preset heating target temperature, the actual heating power and the actual heating time to realize the preheating of the fuel.
Step S17, judging whether the engine is started successfully, if so, executing step S18; if not, go to step S19.
In step S18, the engine control unit does not need to adjust the preset heating target temperature.
In step S19, the engine control unit corrects the preset heating target temperature for the next engine cold start.
According to the control method of the fuel preheating system, the fuel preheating system is arranged on the engine, when the outdoor environment temperature is lower than the preset outdoor temperature threshold value and the water temperature of the engine is lower than the preset engine temperature threshold value, the fuel preheating system is controlled to be started to preheat the fuel in the oil way, so that the fuel temperature can reach the preset heating target temperature when the engine is normally started, the problem that the engine is difficult to cold start when the content of gasoline ethanol is high and the environment temperature is low is solved, the engine can be suitable for oil products with various ethanol ratios, and the success rate of cold start of the engine is improved.
The control device 2 of the fuel preheating system of the embodiment of the invention is described below with reference to fig. 5.
As shown in fig. 5, the control device 2 of the fuel preheating system of the embodiment of the invention includes: an acquisition module 21, a control module 22, a determination module 23 and a heating module 24, wherein,
the acquisition module 21 is used for acquiring the outdoor environment temperature and the water temperature of the engine; the control module 22 is used for controlling the starting of the fuel preheating system when the outdoor environment temperature is less than a preset outdoor temperature threshold and the water temperature of the engine is less than a preset engine temperature threshold; the determining module 23 is used for determining the actual heating power and the actual heating time; the heating module 24 is configured to control the fuel preheating system to operate according to a preset heating target temperature, an actual heating power and an actual heating time, so as to preheat the fuel.
According to the control device 2 of the fuel preheating system, the fuel preheating system is arranged on the engine, when the outdoor environment temperature is lower than the preset outdoor temperature threshold and the water temperature of the engine is lower than the preset engine temperature threshold, the fuel preheating system is controlled to be started to preheat the fuel in the oil way, so that the fuel temperature can reach the preset heating target temperature when the engine is normally started, the problem that the engine is difficult to cold start when the content of gasoline ethanol is high and the environment temperature is low is solved, the engine can be suitable for oil products with various ethanol ratios, and the success rate of cold start of the engine is improved.
In some embodiments, the determining module 23 is specifically configured to: acquiring a fuel signal and a voltage and electric quantity signal of a storage battery; and determining the actual heating power and the actual heating time according to the fuel signal and the voltage electric quantity signal.
In some embodiments, the determining module 23 is further specifically configured to: determining a fuel base temperature and a fuel concentration according to the fuel signal; determining heating heat according to the basic fuel temperature, the preset heating target temperature and the fuel concentration; and determining the actual heating power and the actual heating time according to the heating heat and the voltage electric quantity signals.
In some embodiments, the control module 22 is specifically configured to: judging whether the engine can be normally started or not; if so, determining that the heating temperature of the fuel preheating system meets the preset heating target temperature, and otherwise, correcting the preset heating target temperature.
In some embodiments, the control module 22 is further specifically configured to: and/or when the transmitter operates and the emission of the engine after the engine is started is lower than a preset emission threshold, the engine cannot be started normally.
In some embodiments, the heating module 24 is specifically configured to: determining target heating power according to a preset heating target temperature; calculating the difference value between the actual heating power and the target heating power; and adjusting the actual heating power and the actual heating time according to the difference value, and controlling the fuel preheating system to operate according to the adjusted actual heating power and the adjusted actual heating time so as to preheat the fuel.
In some embodiments, the heating module 24 is specifically configured to: and after the fuel preheating time reaches the adjusted actual heating time and the fuel preheating power reaches the adjusted actual heating power, controlling the fuel preheating system to stop preheating the fuel, and determining that the preheating is finished.
In some embodiments, the heating module 24 is also specifically configured to: and sending out a preheating completion reminding message after the preheating completion is determined.
According to the control device 2 of the fuel preheating system, the fuel preheating system is arranged on the engine, when the outdoor environment temperature is lower than the preset outdoor temperature threshold and the water temperature of the engine is lower than the preset engine temperature threshold, the fuel preheating system is controlled to be started to preheat the fuel in the oil way, so that the fuel temperature can reach the preset heating target temperature when the engine is normally started, the problem that the engine is difficult to cold start when the content of gasoline ethanol is high and the environment temperature is low is solved, the engine can be suitable for oil products with various ethanol ratios, and the success rate of cold start of the engine is improved.
A vehicle 3 of an embodiment of the invention is described below with reference to fig. 6.
As shown in fig. 6, the vehicle 3 of the embodiment of the invention includes: an engine 31, a heating fuel rail 32, a high-pressure nozzle 33 and a control device 2 of a fuel preheating system, wherein,
the heating fuel rail 32 is connected with the engine 31, a heating assembly 41 is arranged on the heating fuel rail 32, and the heating assembly 41 is used for preheating fuel; the high pressure nozzle 33 is connected to the heated fuel rail 32 for supplying air to the engine; the control device 2 of the fuel preheating system is used for controlling the fuel preheating system to operate according to the preset heating target temperature, the actual heating power and the actual heating time so as to preheat the fuel.
According to the vehicle 3 provided by the embodiment of the invention, the fuel preheating system is arranged on the engine, when the outdoor environment temperature is lower than the preset outdoor temperature threshold and the water temperature of the engine is lower than the preset engine temperature threshold, the fuel preheating system is controlled to be started to preheat the fuel in the oil way, so that the fuel temperature can reach the preset heating target temperature when the engine is normally started, the problem that the engine is difficult to cold start when the gasoline and ethanol content is higher and the environment temperature is lower is solved, the engine can be ensured to be suitable for oil products with various ethanol ratios, and the success rate of cold start of the engine is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A control method of a fuel preheating system, characterized by comprising:
acquiring the outdoor ambient temperature and the water temperature of an engine;
when the outdoor environment temperature is lower than a preset outdoor temperature threshold value and the water temperature of the engine is lower than a preset engine temperature threshold value, controlling the fuel preheating system to start;
determining actual heating power and actual heating time;
and controlling the fuel preheating system to operate according to a preset heating target temperature, an actual heating power and the actual heating time so as to preheat the fuel.
2. The control method of the fuel preheating system according to claim 1, wherein determining the actual heating power and the actual heating time includes:
acquiring a fuel signal and a voltage and electric quantity signal of a storage battery;
and determining the actual heating power and the actual heating time according to the fuel signal and the voltage electric quantity signal.
3. The method of claim 2, wherein determining the actual heating power and the actual heating time based on the fuel signal and the voltage charge signal comprises:
determining a fuel base temperature and a fuel concentration from the fuel signal;
determining heating heat according to the fuel basic temperature, the preset heating target temperature and the fuel concentration;
and determining the actual heating power and the actual heating time according to the heating heat and the voltage electric quantity signal.
4. The control method of the fuel preheating system according to claim 1, characterized by further comprising, after controlling the fuel preheating system to preheat the fuel:
judging whether the engine can be normally started or not;
if so, determining that the heating temperature of the fuel preheating system meets the preset heating target temperature, otherwise, correcting the preset heating target temperature.
5. The control method of the fuel preheating system according to claim 4, characterized in that correcting the preset heating target temperature includes:
and correcting the preset heating target temperature according to a preset temperature threshold until the engine can be normally started.
6. The control method of the fuel preheating system according to claim 4, wherein the engine being unable to start normally includes:
the engine is operated and the starting speed of the engine is lower than a preset speed, and/or
The engine is operated and the emission after the engine is started is lower than a preset emission threshold.
7. The control method of the fuel preheating system according to claim 1, wherein controlling the fuel preheating system to operate according to the preset heating target temperature, the actual heating power, and the actual heating time to preheat the fuel comprises:
determining target heating power according to the preset heating target temperature;
calculating a difference value between the actual heating power and the target heating power;
and adjusting the actual heating power and the actual heating time according to the difference value, and controlling the fuel preheating system to operate according to the adjusted actual heating power and the adjusted actual heating time so as to preheat the fuel.
8. The control method of the fuel preheating system according to claim 7, further comprising, after controlling the operation of the fuel preheating system according to the adjusted actual heating power and the adjusted actual heating time:
after the fuel preheating time reaches the adjusted actual heating time and the fuel preheating power reaches the adjusted actual heating power, controlling the fuel preheating system to stop preheating the fuel, determining that the preheating is completed, and sending a preheating completion reminding message after determining that the preheating is completed.
9. A control device of a fuel preheating system, characterized by comprising:
the acquisition module is used for acquiring the outdoor environment temperature and the water temperature of the engine;
the control module is used for controlling the fuel oil preheating system to be started when the outdoor environment temperature is smaller than a preset outdoor temperature threshold value and the water temperature of the engine is smaller than a preset engine temperature threshold value;
the determining module is used for determining the actual heating power and the actual heating time;
and the heating module is used for controlling the fuel preheating system to operate according to a preset heating target temperature, actual heating power and actual heating time so as to preheat the fuel.
10. A vehicle, characterized by comprising:
an engine;
the heating fuel rail is connected with the engine, and a heating assembly is arranged on the heating fuel rail and used for preheating the fuel.
The high-pressure nozzle is connected with the heating fuel guide rail and used for supplying air to the engine;
the control device of the fuel preheating system according to claim 9, configured to control the operation of the fuel preheating system to preheat the fuel according to a preset heating target temperature, an actual heating power, and an actual heating time.
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| CN202310024672.5A CN115949537A (en) | 2023-01-09 | 2023-01-09 | Control method and device of fuel preheating system and vehicle |
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| CN202310024672.5A CN115949537A (en) | 2023-01-09 | 2023-01-09 | Control method and device of fuel preheating system and vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117108419A (en) * | 2023-10-19 | 2023-11-24 | 潍柴动力股份有限公司 | Methanol heating control method, device and system of methanol engine |
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| CN102852691A (en) * | 2012-09-05 | 2013-01-02 | 安徽江淮汽车股份有限公司 | Cold start method and system for flexible fuel vehicle |
| CN112727657A (en) * | 2020-12-31 | 2021-04-30 | 东风越野车有限公司 | Vehicle low-temperature auxiliary starting system and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102852691A (en) * | 2012-09-05 | 2013-01-02 | 安徽江淮汽车股份有限公司 | Cold start method and system for flexible fuel vehicle |
| CN112727657A (en) * | 2020-12-31 | 2021-04-30 | 东风越野车有限公司 | Vehicle low-temperature auxiliary starting system and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117108419A (en) * | 2023-10-19 | 2023-11-24 | 潍柴动力股份有限公司 | Methanol heating control method, device and system of methanol engine |
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