CN119222071A - Mixed fuel preheating method, delivery method, preheating system and vehicle - Google Patents
Mixed fuel preheating method, delivery method, preheating system and vehicle Download PDFInfo
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- CN119222071A CN119222071A CN202411438642.XA CN202411438642A CN119222071A CN 119222071 A CN119222071 A CN 119222071A CN 202411438642 A CN202411438642 A CN 202411438642A CN 119222071 A CN119222071 A CN 119222071A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/125—Fuel
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0602—Control of components of the fuel supply system
- F02D19/0605—Control of components of the fuel supply system to adjust the fuel pressure or temperature
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0623—Failure diagnosis or prevention; Safety measures; Testing
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0626—Measuring or estimating parameters related to the fuel supply system
- F02D19/0628—Determining the fuel pressure, temperature or flow, the fuel tank fill level or a valve position
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0649—Liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers
- F02D19/0652—Biofuels, e.g. plant oils
- F02D19/0655—Biofuels, e.g. plant oils at least one fuel being an alcohol, e.g. ethanol
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- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
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- Fuel-Injection Apparatus (AREA)
Abstract
本申请涉及发动机控制技术领域，具体提供一种混合燃料的预热方法、输送方法、预热系统及汽车，以在保证输油管安全的基础上提高混合燃料的燃烧效率。混合燃料的预热方法包括：获取输油管内的混合燃料的当前温度T0；比较当前温度T0与预设温度t；若当前温度T0大于或等于预设温度t，则返回至获取输油管内的混合燃料的当前温度T0；若当前温度T0小于预设温度t，以一级电流I1加热输油管以使输油管内的混合燃料的温度升高；当输油管内的混合燃料的温度达到一级温度T1时，以二级电流I2加热输油管以使输油管内的混合燃料的温度再次升高；当输油管内的混合燃料的温度达到二级温度T2时，停止对输油管加热，T2＞T1，I2＜I1。
The present application relates to the field of engine control technology, and specifically provides a preheating method, a delivery method, a preheating system and a vehicle for a mixed fuel, so as to improve the combustion efficiency of the mixed fuel on the basis of ensuring the safety of the oil pipeline. The preheating method for the mixed fuel includes: obtaining the current temperature T 0 of the mixed fuel in the oil pipeline; comparing the current temperature T 0 with the preset temperature t; if the current temperature T 0 is greater than or equal to the preset temperature t, returning to obtaining the current temperature T 0 of the mixed fuel in the oil pipeline; if the current temperature T 0 is less than the preset temperature t, heating the oil pipeline with a primary current I 1 to increase the temperature of the mixed fuel in the oil pipeline; when the temperature of the mixed fuel in the oil pipeline reaches the primary temperature T 1 , heating the oil pipeline with a secondary current I 2 to increase the temperature of the mixed fuel in the oil pipeline again; when the temperature of the mixed fuel in the oil pipeline reaches the secondary temperature T 2 , stopping heating the oil pipeline, T 2 >T 1 , I 2 <I 1 .
Description
Technical Field
The application relates to the technical field of engine control, in particular to a mixed fuel preheating method, a mixed fuel conveying method, a mixed fuel preheating system and an automobile.
Background
In the great background of the global energy crisis, the search for sustainable, clean alternative fuels has become an urgent task at the moment. Among them, alcohol fuels are gradually coming into the field of view of people and are receiving a great deal of attention because of their unique advantages. The alcohol fuel as a simple organic compound can be prepared from various renewable resources such as wood, crop wastes and the like through a gasification process, so that the alcohol fuel has the advantage of wide sources. In addition, the alcohol production process is relatively environmentally friendly, and the amount of carbon dioxide produced by combustion is substantially equivalent to the amount of carbon dioxide consumed in the production process, and therefore is considered to be a relatively clean fuel.
However, the physical and chemical properties of alcohol fuels, such as higher evaporation latent heat, lower cetane number and viscosity, can cause problems of fire difficulty, larger pressure fluctuation of an injection system, high formaldehyde emission and the like during use. Thus, based on comprehensive consideration of energy utilization and power output, mixed fuels composed of alcohols and finished oils are gradually appeared in the market.
The mixed fuel of the alcohols and the finished oil may exhibit some special physical properties at low temperature, for example, delamination of the alcohols and the finished oil at low temperature, a decrease in solubility of a part of components in the mixed fuel at low temperature to form solid particles to cause turbidity of the mixed fuel, and an increase in viscosity of the alcohols at low temperature to cause poor fluidity. Delamination, cloudiness and increased viscosity of the blended fuel at low temperatures make the combustion of the blended fuel inefficient.
Disclosure of Invention
In view of the foregoing, it is necessary to provide a method for preheating a mixed fuel, a method for transporting the mixed fuel, a preheating system and an automobile, so as to improve the combustion efficiency of the mixed fuel while ensuring the safety of the delivery pipe.
The embodiment of the application provides a preheating method of mixed fuel, which comprises the following steps:
Acquiring the current temperature T 0 of the mixed fuel in the oil delivery pipe;
Comparing the current temperature T 0 with a preset temperature T;
If the current temperature T 0 is greater than or equal to the preset temperature T, executing the current temperature T 0 of the mixed fuel in the oil delivery pipe again;
If the current temperature T 0 is smaller than the preset temperature T, heating the oil delivery pipe by using a first-level current I 1 to raise the temperature of the mixed fuel in the oil delivery pipe;
When the temperature of the mixed fuel in the oil delivery pipe reaches the first-stage temperature T 1, heating the oil delivery pipe by using the second-stage current I 2 so as to increase the temperature of the mixed fuel in the oil delivery pipe again;
stopping heating the oil delivery pipe when the temperature of the mixed fuel in the oil delivery pipe reaches a second-stage temperature T 2;
Wherein T 2＞T1,I2＜I1.
In the preheating method of the mixed fuel, when the current temperature T 0 of the mixed fuel in the oil delivery pipe is smaller than the preset temperature T, the oil delivery pipe is heated by the first-stage current I 1 so as to realize that the temperature of the mixed fuel in the oil delivery pipe rises to the first-stage temperature T 1 in a short time, and then the oil delivery pipe is heated by the second-stage current I 2 smaller than the first-stage current I 1 so as to maintain the temperature of the mixed fuel between the first-stage temperature T 1 and the second-stage temperature T 2, thereby avoiding the special physical property of the mixed fuel due to low temperature and improving the combustion efficiency of the mixed fuel. In addition, in the method for preheating the mixed fuel, the mixed fuel in the oil delivery pipe is heated in a gradient mode, and when the temperature of the mixed fuel in the oil delivery pipe reaches the second-stage temperature T 2, the heating of the oil delivery pipe is stopped, so that the damage to the oil delivery pipe caused by too fast temperature change or too high temperature can be avoided, and the safety of the oil delivery pipe is ensured.
In some embodiments, before the obtaining the current temperature T 0 of the mixed fuel in the delivery pipe, the method further includes:
Determining the composition of the mixed fuel in the oil delivery pipe;
The preset temperature T, the primary temperature T 1, and the secondary temperature T 2 are determined based on the components of the mixed fuel.
Therefore, the preset temperature T, the primary temperature T 1 and the secondary temperature T 2 are determined by the components of the mixed fuel, so that the formed stepped temperature is matched with different components in the mixed fuel, and the heating efficiency of the mixed fuel is improved.
In some embodiments, the method of preheating the mixed fuel further comprises:
The primary current I 1 and the secondary current I 2 are determined based on the composition of the mixed fuel, the preset temperature T, the primary temperature T 1, and the secondary temperature T 2.
Therefore, through the arrangement, the primary current I 1 and the secondary current I 2 can be better matched with the heating requirement of the mixed fuel, and the heating efficiency is improved.
In some embodiments, the method of preheating the blended fuel satisfies the relationship:
0.25I1≤I2≤0.5I1。
Therefore, the heating efficiency of the oil delivery pipe can be improved on the basis of low cost by reasonably setting the magnitude relation between the primary current I 1 and the secondary current I 2. Specifically, if I 2＜0.2511 is longer than I 2≥0.2511, the period for the temperature of the mixed fuel in the delivery pipe to rise from the primary temperature T 1 to the secondary temperature T 2 is longer, resulting in low heating efficiency, and if I 2＞0.511 is higher than I 2≤0.511, the power of the heating device required is too high, resulting in an increase in cost for maintaining the temperature of the mixed fuel in the delivery pipe between the primary temperature T 1 and the secondary temperature T 2.
In some embodiments, the method of preheating the blended fuel satisfies the relationship:
10°C≤t≤15°C,30°C≤T1≤35℃,55℃≤T2≤60°C。
Therefore, by reasonably configuring the ranges of the temperatures, various mixed fuel heating requirements can be satisfied on the basis of low cost.
In some embodiments, the blended fuel includes an alcohol including at least one of methanol and ethanol and a finished oil including one of gasoline and diesel.
Therefore, the components of the mixed fuel are appropriately arranged, so that the method can be suitably used for the above-described method for preheating the mixed fuel.
In some embodiments, the obtaining the current temperature T 0 of the mixed fuel in the delivery pipe includes:
Sequentially acquiring a plurality of detection temperatures T j on a conveying path of an oil conveying pipe;
Calculating to obtain a plurality of maximum detection temperature differences T c between the detection temperatures T j;
Comparing the maximum detection temperature difference T c with a preset temperature difference T y;
If the maximum detected temperature difference T c is larger than the preset temperature difference T y, returning to the step, and sequentially acquiring a plurality of detected temperatures T j on the conveying path of the oil conveying pipe;
If the maximum detected temperature difference T c is smaller than or equal to the preset temperature difference T y, calculating to obtain an average value T p of the detected temperatures T j, where T p=T0.
Therefore, the accuracy of the temperature collection samples can be improved by obtaining the plurality of detection temperatures T j at multiple points of the oil delivery pipe, the average value T p of the plurality of detection temperatures T j is obtained by calculating when the maximum detection temperature difference T c is smaller than or equal to the preset temperature difference T y, and the accuracy of the average value T p can be prevented from being influenced by the detection errors in the plurality of detection temperatures T j, so that the accuracy of the obtained current temperature T 0 is improved.
The embodiment of the application also provides a method for conveying the mixed fuel, which comprises the following steps:
The preheating method of the mixed fuel, wherein,
If the current temperature T 0 is smaller than the preset temperature T, controlling the oil injection pulse width of the oil injector to be PW 1;
If the current temperature T 0 is greater than or equal to the preset temperature T, controlling the oil injection pulse width of the oil injector to be PW 2,PW1＞PW2.
The mixed fuel preheating method can avoid the special physical property of the mixed fuel due to low temperature, improves the combustion efficiency of the mixed fuel, adopts a gradient mode to heat the mixed fuel in the oil delivery pipe, stops heating the oil delivery pipe when the temperature of the mixed fuel in the oil delivery pipe reaches the second-stage temperature T 2, and can avoid damage to the oil delivery pipe caused by too fast temperature change or too high temperature so as to ensure the safety of the oil delivery pipe. In addition, the method for conveying the mixed fuel controls the oil injection pulse width of the oil injector based on the current temperature T 0 and the preset temperature T, so that stable power output can be ensured.
The embodiment of the application also provides a preheating system, which comprises:
The temperature detection module is arranged in the oil delivery pipe and used for acquiring the current temperature T 0 of the mixed fuel in the oil delivery pipe;
the heating module is arranged on the oil delivery pipe and is used for heating the oil delivery pipe by electrifying;
The control module is electrically connected with the temperature detection module to obtain the current temperature T 0, is used for comparing the current temperature T 0 with a preset temperature T, is used for restarting the temperature detection module when the current temperature T 0 is greater than or equal to the preset temperature T, is also electrically connected with the heating module, is used for controlling the heating module to heat an oil delivery pipe through a first-stage current I 1 when the current temperature T 0 is less than the preset temperature T, is also used for controlling the heating module to heat the oil delivery pipe through a second-stage current I 2 when the temperature of the mixed fuel in the oil delivery pipe reaches the first-stage temperature T 1, and is also used for controlling the heating module to stop heating the oil delivery pipe when the temperature of the mixed fuel in the oil delivery pipe reaches the second-stage temperature T 2;
Wherein T 2＞T1,I2＜I1.
In the preheating system, when the current temperature T 0 of the mixed fuel in the oil delivery pipe is smaller than the preset temperature T, the control module controls the heating module to heat the oil delivery pipe by the first-stage current I 1 so as to achieve the effect that the temperature of the mixed fuel in the oil delivery pipe rises to the first-stage temperature T 1 in a short time, and then the oil delivery pipe is heated by the second-stage current I 2 smaller than the first-stage current I 1 so as to maintain the temperature of the mixed fuel between the first-stage temperature T 1 and the second-stage temperature T 2, thereby avoiding the special physical property of the mixed fuel due to low temperature and improving the combustion efficiency of the mixed fuel. In addition, in the preheating system, the mixed fuel in the oil delivery pipe is heated in a gradient mode, and when the temperature of the mixed fuel in the oil delivery pipe reaches the second-stage temperature T 2, the heating of the oil delivery pipe is stopped, so that the damage to the oil delivery pipe caused by too fast temperature change or too high temperature can be avoided, and the safety of the oil delivery pipe is ensured.
The embodiment of the application also provides an automobile, which comprises the preheating system, can improve the combustion efficiency of the mixed fuel applied to the automobile and ensures the safety of an oil delivery pipe for delivering the mixed fuel.
Drawings
Fig. 1 is a schematic flow chart of a method for preheating a mixed fuel according to an embodiment of the application.
Fig. 2 is a schematic flow chart of step S100 in the method for preheating the mixed fuel shown in fig. 1.
FIG. 3 is a schematic diagram of a preheating system according to an embodiment of the present application.
Fig. 4 is a schematic view of a part of an architecture of an automobile according to an embodiment of the application.
The main element symbols are as follows, an automobile 1000, a preheating system 100, a fuel analyzer 101, a parameter analyzer 102, a temperature detection module 110, a heating module 120, a control module 130, an oil tank 140, a low-pressure oil pump 150, an oil delivery pipe 160, a concentration detection module 170, a high-pressure oil pump 180 and an oil injection module 190.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, unless explicitly stated and limited otherwise, the term "connected" shall be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected or communicable with each other, directly connected, indirectly connected through an intermediary, or connected internally of two elements or an interaction relationship of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present application provides a method for preheating a mixed fuel in an oil delivery pipe, so as to ensure that the temperature of the mixed fuel in the oil delivery pipe is not lower than a preset temperature t. The oil delivery pipe can be an oil supply mechanism in vehicles such as automobiles, trains and the like, and the corresponding preheating method of the mixed fuel is applied to the vehicles such as the automobiles, the trains and the like. Preferably, the above-described method of preheating the mixed fuel is applied to an automobile.
Illustratively, the blended fuel includes alcohols including at least one of methanol and ethanol and a finished oil including one of gasoline and diesel. For example, the mixed fuel may be composed of methanol and gasoline, or ethanol and gasoline, or methanol and diesel, or ethanol and diesel, or methanol, ethanol and gasoline, or methanol, ethanol and diesel.
Therefore, the components of the mixed fuel are appropriately arranged, so that the method can be suitably used for the above-described method for preheating the mixed fuel.
It should be noted that, the special physical bodies of methanol and ethanol which are shown at low temperature are different in the mixed fuel, but the amount of carbon dioxide generated by the combustion of methanol and ethanol is basically equivalent to the amount of carbon dioxide consumed in the production process, so that the methanol and the ethanol are considered as relatively cleaner fuels.
The mixed fuel can show layering, turbidity, viscosity increase and the like when being lower than a certain temperature threshold, and the preset temperature t is higher than the temperature threshold so as to heat the mixed fuel before layering, turbidity, viscosity increase and the like of the mixed fuel.
Further, the difference between the preset temperature t and the temperature threshold ranges between 3 ℃ and 5 ℃, for example, 3 ℃,4 ℃ and 5 ℃. For example, when the temperature of the environment in which the oil delivery pipe is located is lower than a certain environmental temperature, the difference between the preset temperature t and the temperature threshold may be set to 5 ℃, and when the temperature of the environment in which the oil delivery pipe is located is greater than or equal to a certain environmental temperature, the difference between the preset temperature t and the temperature threshold may be set to 3 ℃.
Referring to fig. 1, the method for preheating the mixed fuel includes:
S100, acquiring the current temperature T 0 of the mixed fuel in the oil pipeline.
Specifically, the current temperature T 0 may be obtained by a temperature sensor. Illustratively, the temperature sensor is mounted on the delivery pipe with the sensing end of the temperature sensor inserted into the mixed fuel located within the delivery pipe. Preferably, the detection end of the temperature sensor is positioned at the central part of the mixed fuel along the radial direction of the oil delivery pipe, so that the accuracy of the temperature of the mixed fuel obtained by the temperature sensor can be improved.
S200, comparing the current temperature T 0 with a preset temperature T.
Specifically, t is more than or equal to 10 ℃ and less than or equal to 15 ℃. Wherein t may be 10 ℃, 11 ℃, 12 ℃, 13 ℃, 14 ℃, 15 ℃.
Therefore, by reasonably configuring the range of the preset temperature t, the method for preheating the mixed fuel can be improved to match the types of the mixed fuel containing alcohols.
And S300, if the current temperature T 0 is greater than or equal to the preset temperature T, returning to the step S100 to acquire the current temperature T 0 of the mixed fuel in the oil pipeline.
Specifically, when the current temperature T 0 is greater than or equal to the preset temperature T, the phenomenon of layering, turbidity, viscosity increase and the like of the mixed fuel in the oil delivery pipe do not exist, and at this time, the mixed fuel in the oil delivery pipe is not required to be heated.
S400, if the current temperature T 0 is smaller than the preset temperature T, heating the oil delivery pipe by using the first-stage current I 1 to raise the temperature of the mixed fuel in the oil delivery pipe.
Specifically, the preheating method of the mixed fuel is applied to vehicles such as automobiles, trains and the like, and the heating of the oil delivery pipe by adopting an electric heating mode is more convenient to realize.
S500, when the temperature of the mixed fuel in the oil delivery pipe reaches the first-stage temperature T 1, the oil delivery pipe is heated by the second-stage current I 2 so that the temperature of the mixed fuel in the oil delivery pipe is increased again. Wherein, I 2＜I1.
Specifically, 30 ℃ less than or equal to T 1≤35℃,T1 can be 30 ℃, 31 ℃, 32 ℃, 33 ℃, 34 ℃ and 35 ℃. Therefore, the preheating method of the mixed fuel can be improved to match the types of the mixed fuel containing alcohols by reasonably configuring the range of the preset primary temperature T 1.
In some embodiments, the method of preheating the mixed fuel satisfies the relationship 0.25I 1≤I2≤0.5I1.
Illustratively, I 2 may be 0.25I 1、0.3I1、0.35I1、0.4I1、0.45I1、0.5I1.
Therefore, the heating efficiency of the oil delivery pipe can be improved on the basis of low cost by reasonably setting the magnitude relation between the primary current I 1 and the secondary current I 2. Specifically, if I 2＜0.2511 is longer than I 2≥0.2511, the period for the temperature of the mixed fuel in the delivery pipe to rise from the primary temperature T 1 to the secondary temperature T 2 is longer, resulting in low heating efficiency, and if I 2＞0.511 is too high, compared to I 2≤0.511, the power of the heating device required is too high, resulting in an increase in cost for maintaining the temperature of the mixed fuel in the delivery pipe between the primary temperature T 1 and the secondary temperature T 2.
And S600, stopping heating the oil delivery pipe when the temperature of the mixed fuel in the oil delivery pipe reaches the second-stage temperature T 2. Wherein T 2＞T1.
Specifically, 55 ℃ less than or equal to T 2≤60℃.T2 can be 55 ℃, 56 ℃, 57 ℃, 58 ℃, 59 ℃ and 60 ℃.
Therefore, by setting the range of the secondary temperature T 2, the above-described method for preheating the mixed fuel can be improved to match the type of the mixed fuel containing alcohols.
It should be noted that, there is no execution sequence of steps S300, S400, S500, and S600, and the execution sequences of the four steps belong to a parallel relationship.
In the preheating method of the mixed fuel, when the current temperature T 0 of the mixed fuel in the oil delivery pipe is smaller than the preset temperature T, the oil delivery pipe is heated by the first-stage current I 1 so as to realize that the temperature of the mixed fuel in the oil delivery pipe rises to the first-stage temperature T 1 in a short time, and then the oil delivery pipe is heated by the second-stage current I 2 smaller than the first-stage current I 1 so as to maintain the temperature of the mixed fuel between the first-stage temperature T 1 and the second-stage temperature T 2, thereby avoiding the special physical property of the mixed fuel due to low temperature and improving the combustion efficiency of the mixed fuel. In addition, in the method for preheating the mixed fuel, the mixed fuel in the oil delivery pipe is heated in a gradient mode, and when the temperature of the mixed fuel in the oil delivery pipe reaches the second-stage temperature T 2, the heating of the oil delivery pipe is stopped, so that the damage to the oil delivery pipe caused by too fast temperature change or too high temperature can be avoided, and the safety of the oil delivery pipe is ensured.
Referring to fig. 1, in some embodiments, before the step S100 of obtaining the current temperature T 0 of the mixed fuel in the delivery pipe further includes:
S010, determining the components of the mixed fuel in the oil delivery pipe.
In particular, the manner of determination described above may be known to the supplier of the injected mixed fuel or may be obtained by analysis by a component analyzer.
S020, determining a preset temperature T, a primary temperature T 1 and a secondary temperature T 2 based on the components of the mixed fuel.
Therefore, the preset temperature T, the primary temperature T 1 and the secondary temperature T 2 are determined by the components of the mixed fuel, so that the formed stepped temperature is matched with different components in the mixed fuel, and the heating efficiency of the mixed fuel is improved.
In some embodiments, the method of preheating the mixed fuel further comprises:
S030, the primary current I 1 and the secondary current I 2 are determined based on the composition of the mixed fuel and the preset temperature T, the primary temperature T 1, and the secondary temperature T 2.
Therefore, through the arrangement, the primary current I 1 and the secondary current I 2 can be better matched with the heating requirement of the mixed fuel, and the heating efficiency of the mixed fuel is improved.
Referring to fig. 2, in some embodiments, step S100 of obtaining the current temperature T 0 of the mixed fuel in the delivery pipe includes:
S110, sequentially acquiring a plurality of detection temperatures T j on a conveying path of the oil conveying pipe.
Specifically, a plurality of temperature sensors are arranged on a conveying path of an oil conveying pipe at intervals, and a plurality of detection temperatures T j are sequentially acquired through the plurality of temperature sensors. Wherein, the plurality means three or more.
S120, calculating to obtain the maximum detection temperature difference T c between the detection temperatures T j.
Specifically, the absolute values of the detected temperatures between every two detected temperatures T j are taken, so as to avoid misjudgment of the maximum detected temperature difference T c of the plurality of detected temperatures T j due to the calculation sequence.
S130, comparing the maximum detection temperature difference T c with a preset temperature difference T y.
And S140, if the maximum detection temperature difference T c is larger than the preset temperature difference T y, returning to the step S110, and sequentially acquiring a plurality of detection temperatures T j on the conveying path of the oil conveying pipe.
Specifically, if the maximum detected temperature difference T c is greater than the preset temperature difference T y, it indicates that there is erroneous detection data between the detected temperatures T j, and it is necessary to re-acquire the detected temperatures T j to ensure the accuracy of the detected temperatures T j.
S150, if the maximum detected temperature difference T c is smaller than or equal to the preset temperature difference T y, calculating to obtain an average value T p of a plurality of detected temperatures T j, wherein T p=T0.
Therefore, the accuracy of the temperature collection samples can be improved by obtaining the plurality of detection temperatures T j at multiple points of the oil delivery pipe, the average value T p of the plurality of detection temperatures T j is obtained by calculating when the maximum detection temperature difference T c is smaller than or equal to the preset temperature difference T y, and the accuracy of the average value T p can be prevented from being influenced by the detection errors in the plurality of detection temperatures T j, so that the accuracy of the obtained current temperature T 0 is improved.
The embodiment of the application also provides a method for conveying the mixed fuel, which comprises the method for preheating the mixed fuel. If the current temperature T 0 is less than the preset temperature T, the injection pulse width of the injector is controlled to be PW 1. If the current temperature T 0 is greater than or equal to the preset temperature T, controlling the oil injection pulse width of the oil injector to be PW 2,PW1＞PW2.
Specifically, the method for conveying the mixed fuel is applied to vehicles such as automobiles, trains and the like. Preferably, the above method for transporting the mixed fuel is applied to an automobile.
It should be noted that the concentrations of the mixed fuel at different temperatures may be different, that is, the active components of the mixed fuel in the same volume at different temperatures may be different, specifically, based on the self characteristics of the mixed fuel, it is known that the concentration of the mixed fuel at the current temperature T 0 is smaller than the concentration of the mixed fuel at the current temperature T 0 which is greater than or equal to the preset temperature T, so, in order to ensure stable power output, that is, the total mass of the active components of the mixed fuel output in the same time period is the same, the injection pulse width PW 1 when the current temperature T 0 is smaller than the preset temperature T needs to be greater than the injection pulse width PW 2 when the current temperature T 0 is greater than or equal to the preset temperature T.
The magnitudes of the injection pulse width PW 1 and the injection pulse width PW 2 can be obtained through multiple experimental tests of power output, or can be set in a preset manner and continuously adjusted based on a subsequent power output result. In addition, the current temperature T 0 of the mixed fuel, the preset temperature T of the mixed fuel, the injection pulse width PW 1 and the injection pulse width PW 2 are all pre-stored in a control system for controlling the fuel injector, and the control system is used for controlling the injection pulse width of the fuel injector to be PW 1 if the current temperature T 0 is smaller than the preset temperature T and controlling the injection pulse width of the fuel injector to be PW 2 if the current temperature T 0 is larger than or equal to the preset temperature T.
The mixed fuel preheating method can avoid the special physical property of the mixed fuel due to low temperature, improves the combustion efficiency of the mixed fuel, adopts a gradient mode to heat the mixed fuel in the oil delivery pipe, stops heating the oil delivery pipe when the temperature of the mixed fuel in the oil delivery pipe reaches the second-stage temperature T 2, and can avoid damage to the oil delivery pipe caused by too fast temperature change or too high temperature so as to ensure the safety of the oil delivery pipe. In addition, the method for conveying the mixed fuel controls the oil injection pulse width of the oil injector based on the magnitude relation between the current temperature T 0 and the preset temperature T, so that stable power output can be ensured.
Referring to fig. 3, the embodiment of the application further provides a preheating system 100, which includes a temperature detecting module 110, a heating module 120, and a control module 130. The preheating system 100 is applied to vehicles such as automobiles, trains and the like. Preferably, the above-described preheating system 100 is applied to an automobile.
Specifically, the temperature detection module 110 is disposed in the oil delivery pipe, and is configured to obtain the current temperature T 0 of the mixed fuel in the oil delivery pipe, so as to implement step S100 in the above-mentioned method for preheating the mixed fuel. The temperature detection module 110 may include a plurality of temperature sensors, so as to cooperate with the control module 130 to implement steps S110 to S150 in the above-mentioned method for preheating the mixed fuel, and the heating module 120 is disposed on the oil pipe and is used for electrically heating the oil pipe. The control module 130 is electrically connected with the temperature detection module 110 to obtain a current temperature T 0 for facilitating the subsequent comparison, the control module 130 is used for comparing the current temperature T 0 with a preset temperature T to realize a step S200 in the above-mentioned mixed fuel preheating method, the control module 130 is used for restarting the temperature detection module 110 when the current temperature T 0 is greater than or equal to the preset temperature T to realize a step S200 in the above-mentioned mixed fuel preheating method, the control module 130 is further electrically connected with the heating module 120, and is used for controlling the heating module 120 to heat the oil delivery pipe with a primary current I 1 when the current temperature T 0 is less than the preset temperature T to realize a step S400 in the above-mentioned mixed fuel preheating method, the control module 130 is further used for controlling the heating module 120 to heat the oil delivery pipe with a secondary current I 2 when the temperature of the mixed fuel in the oil delivery pipe reaches the primary temperature T 1 to realize a step S500 in the above-mentioned mixed fuel preheating method, and the control module 130 is further used for controlling the heating module 120 to stop heating the oil delivery pipe to heat the mixed fuel when the temperature in the pipe reaches the secondary temperature T 2 to realize a step S600 in the above-mentioned mixed fuel preheating method. Wherein T 2＞T1,I2＜I1.
Further, referring to fig. 3, the preheating system 100 further includes a fuel analyzer 101 and a parameter analyzer 102. The fuel analyzer 101 is electrically connected to the control module 130 and is used for analyzing and determining the composition of the mixed fuel in the oil delivery pipe so as to realize step S010 in the above-mentioned mixed fuel preheating method, the parameter analyzer 102 is electrically connected to the control module 130 and is used for determining the preset temperature T, the first-stage temperature T 1 and the second-stage temperature T 2 based on the composition of the mixed fuel so as to realize step S020 in the above-mentioned mixed fuel preheating method, and the parameter analyzer 102 is also used for determining the first-stage current I 1 and the second-stage current I 2 based on the composition of the mixed fuel, the preset temperature T, the first-stage temperature T 1 and the second-stage temperature T 2 so as to realize step S030 in the above-mentioned mixed fuel preheating method.
In the preheating system 100, when the current temperature T 0 of the mixed fuel in the fuel delivery pipe is less than the preset temperature T, the control module 130 controls the heating module 120 to heat the fuel delivery pipe with the first-stage current I 1 to raise the temperature of the mixed fuel in the fuel delivery pipe to T 1 in a short time, and then heats the fuel delivery pipe with the second-stage current I 2 less than the first-stage current I 1, so as to maintain the temperature of the mixed fuel between the first-stage temperature T 1 and the second-stage temperature T 2, thereby avoiding the special physical properties of the mixed fuel due to low temperature and improving the combustion efficiency of the mixed fuel. In addition, in the preheating system 100, the heating of the mixed fuel in the oil delivery pipe is realized in a gradient manner, and when the temperature of the mixed fuel in the oil delivery pipe reaches the second-stage temperature T 2, the heating of the oil delivery pipe is stopped, so that the damage to the oil delivery pipe caused by too fast temperature change or too high temperature can be avoided, and the safety of the oil delivery pipe is ensured.
Referring to fig. 4, an embodiment of the present application further provides an automobile 1000 including the above-mentioned preheating system 100. To further illustrate the state of the default system 100 when it is applied to the automobile 1000, a partial architectural diagram of the automobile 1000 will be described herein as an example.
With continued reference to fig. 4, the vehicle 1000 includes a fuel tank 140, a low pressure fuel pump 150, a fuel delivery pipe 160, a concentration detection module 170, a high pressure fuel pump 180, and a fuel injection module 190. The oil tank 140 is used for loading mixed fuel, the low-pressure oil pump 150 stretches into the mixed fuel in the oil tank 140, two ends of the oil delivery pipe 160 are respectively communicated with the low-pressure oil pump 150 and the oil injection module 190, the heating module 120 in the preheating system 100 is installed on the oil delivery pipe 160, the temperature detection module 110 in the preheating system 100 is installed on the oil delivery pipe 160, the detection end of the temperature detection module 110 extends into the oil delivery pipe 160, the control module 130 is a driving computer and is respectively electrically connected with the low-pressure oil pump 150, the high-pressure oil pump 180 and the oil injection module 190, and the concentration detection module 170 is used for detecting the concentration of the mixed fuel in the oil delivery pipe 160, so that the control module 130 controls the oil injection pulse width of the oil injection module 190 based on the current concentration of the mixed fuel.
The preset system 100 in the automobile can avoid the special physical property of the mixed fuel due to low temperature, and improve the combustion efficiency of the mixed fuel in the automobile. In addition, in the preheating system 100 of the automobile, the gradient mode is adopted to heat the mixed fuel in the oil delivery pipe 160, and when the temperature of the mixed fuel in the oil delivery pipe 160 reaches the second-stage temperature T 2, the heating of the oil delivery pipe is stopped, so that the damage to the oil delivery pipe 160 caused by too fast temperature change or too high temperature can be avoided, and the safety of the oil delivery pipe 160 of the automobile 1000 is ensured.
It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present application without departing from the spirit and scope of the technical solution of the present application.
Claims (10)
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