Preheating method, conveying method and preheating system of mixed fuel and automobile

Abstract

The invention relates to the technical field of engine control, in particular to a preheating method, a conveying method and a preheating system of mixed fuel and an automobile, and aims to improve the combustion efficiency of the mixed fuel on the basis of ensuring the safety of an oil conveying pipe. The preheating method for the mixed fuel comprises the steps that the current temperature T0 of the mixed fuel in an oil conveying pipe is obtained; comparing the current temperature T0 with a preset temperature t; if the current temperature T0 is greater than or equal to the preset temperature t, returning to obtain the current temperature T0 of the mixed fuel in the oil conveying pipe; if the current temperature T0 is smaller than the preset temperature t, the oil conveying pipe is heated with the first-level current I1 so that the temperature of the mixed fuel in the oil conveying pipe can rise; when the temperature of the mixed fuel in the oil conveying pipe reaches the first-level temperature T1, the oil conveying pipe is heated through second-level current I2 so that the temperature of the mixed fuel in the oil conveying pipe can rise again; and when the temperature of the mixed fuel in the oil conveying pipe reaches the second-level temperature T2, heating of the oil conveying pipe is stopped, T2 is larger than T1, and I2 is smaller than I1.

Description

Technical Field

[0001] The present application relates to the field of engine control technology, and in particular to a mixed fuel preheating method, a delivery method, a preheating system and a vehicle. Background Art

[0002] Under the background of global energy crisis, finding sustainable and clean alternative fuels has become an urgent task. Among them, alcohol fuels are gradually entering people's horizons and receiving widespread attention due to their unique advantages. As a simple organic compound, alcohol fuels can be produced from a variety of renewable resources such as wood and crop waste through gasification, so they have the advantage of a wide range of sources. In addition, the production process of alcohols is relatively environmentally friendly, and the amount of carbon dioxide produced by their combustion is basically equivalent to the amount of carbon dioxide consumed in their production process, so they are considered to be relatively clean fuels.

[0003] However, the physical and chemical properties of alcohol fuels, such as high latent heat of evaporation, low cetane number and viscosity, can lead to problems such as difficulty in ignition, large pressure fluctuations in the injection system and high formaldehyde emissions. Therefore, based on comprehensive considerations of energy utilization and power output, mixed fuels consisting of alcohol and refined oil products have gradually appeared on the market.

[0004] The mixed fuel of alcohol and refined oil will show some special physical properties at low temperature, such as: stratification of alcohol and refined oil at low temperature, the solubility of some components in the mixed fuel is reduced at low temperature to form solid particles causing turbidity of the mixed fuel, and the viscosity of alcohol increases at low temperature, resulting in poor fluidity. The stratification, turbidity and increased viscosity of the mixed fuel at low temperature make the combustion efficiency of the mixed fuel low. Summary of the invention

[0005] In view of the above, it is necessary to provide a mixed fuel preheating method, a transportation method, a preheating system and a vehicle to improve the combustion efficiency of the mixed fuel while ensuring the safety of the oil pipeline.

[0006] The present application provides a method for preheating a mixed fuel, comprising: Get the current temperature T0 of the mixed fuel in the oil pipeline; Comparing the current temperature T0 with a preset temperature t; If the current temperature T0 is greater than or equal to the preset temperature t, the step of obtaining the current temperature T0 of the mixed fuel in the oil pipeline is performed again; If the current temperature T0 is lower than the preset temperature t, the oil pipeline is heated with the primary current I1 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 T1, the oil pipeline is heated by the secondary current I2 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 T2, the heating of the oil pipeline is stopped; Among them, T2>T1, I2<I1.

[0007] In the above-mentioned preheating method for mixed fuel, when the current temperature T0 of the mixed fuel in the oil pipeline is less than the preset temperature t, the oil pipeline is first heated with the primary current I1 to achieve the temperature of the mixed fuel in the oil pipeline rising to the primary temperature T1 in a short time, and then the oil pipeline is heated with the secondary current I2 which is less than the primary current I1, so as to maintain the temperature of the mixed fuel between the primary temperature T1 and the secondary temperature T2, 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 above-mentioned preheating method for mixed fuel, a gradient method is used to heat the mixed fuel in the oil pipeline, and when the temperature of the mixed fuel in the oil pipeline reaches the secondary temperature T2, the heating of the oil pipeline is stopped, which can avoid damage to the oil pipeline caused by too fast temperature change or too high temperature, so as to ensure the safety of the oil pipeline.

[0008] In some embodiments, before obtaining the current temperature T0 of the mixed fuel in the oil pipeline, the method further includes: Determine the composition of the fuel mixture in the pipeline; The preset temperature t, the primary temperature T1, and the secondary temperature T2 are determined based on the composition of the mixed fuel.

[0009] Therefore, by determining the preset temperature t, the primary temperature T1 and the secondary temperature T2 according to the components of the mixed fuel, the formed step temperature can match the different components in the mixed fuel, thereby improving the efficiency of heating the mixed fuel.

[0010] In some embodiments, the mixed fuel preheating method further comprises: The primary current I1 and the secondary current I2 are determined based on the composition of the mixed fuel, the preset temperature t, the primary temperature T1, and the secondary temperature T2.

[0011] Therefore, through the above settings, the primary current I1 and the secondary current I2 can better match the heating requirements of the mixed fuel, which is beneficial to improving the heating efficiency.

[0012] In some embodiments, the preheating method of the mixed fuel satisfies the relationship: 0.25I1≤I2≤0.5I1.

[0013] Therefore, by reasonably setting the magnitude relationship between the primary current I1 and the secondary current I2, the heating efficiency of the oil pipeline can be improved at a low cost. Specifically, if I2 < 0.2511, the period of the temperature of the mixed fuel in the oil pipeline rising from the primary temperature T1 to the secondary temperature T2 is too long compared to I2 ≥ 0.2511, resulting in low heating efficiency. If I2 > 0.511, the power of the required heating device is too high compared to I2 ≤ 0.511, resulting in an increase in the cost of maintaining the temperature of the mixed fuel in the oil pipeline between the primary temperature T1 and the secondary temperature T2.

[0014] In some embodiments, the preheating method of the mixed fuel satisfies the relationship: 10℃≤t≤15℃, 30℃≤T1≤35℃, 55℃≤T2≤60℃.

[0015] Therefore, by reasonably configuring the above temperature ranges, the heating needs of various mixed fuels can be met at a low cost.

[0016] In some embodiments, the mixed fuel includes alcohols and refined oils, the alcohols include at least one of methanol and ethanol, and the refined oils include one of gasoline and diesel.

[0017] Therefore, by rationally configuring the components of the mixed fuel, the above-mentioned preheating method of the mixed fuel can be better applied.

[0018] In some embodiments, obtaining the current temperature T0 of the mixed fuel in the oil pipeline includes: Multiple detected temperatures T are obtained in sequence along the oil pipeline transportation path. j ; Calculate and obtain multiple detection temperatures T j Maximum detection temperature difference between each other T c ; Compare the maximum detected temperature difference T c The temperature difference with the preset temperature T y ; If the maximum detected temperature difference T c Greater than the preset temperature difference T y , then return to the step of obtaining multiple detection temperatures T in sequence on the oil pipeline transportation path j ; If the maximum detected temperature difference T c Less than or equal to the preset temperature difference T y , then calculate and obtain multiple detection temperatures T j The average value T p , where T p =T0.

[0019] Therefore, multiple detection temperatures T are obtained at multiple points in the oil pipeline. j Can improve the accuracy of temperature collection samples, multiple detection temperatures T j The average value T p The maximum detection temperature difference T c Less than or equal to the preset temperature difference T y It can be calculated and obtained at the same time to avoid the problem of multiple detection temperatures T j The detection error affects the average value T p The accuracy of the current temperature T0 is improved.

[0020] The present application also provides a method for delivering a mixed fuel, including: The above-mentioned mixed fuel preheating method; wherein, If the current temperature T0 is less than the preset temperature t, the injection pulse width of the fuel injector is controlled to be PW1; If the current temperature T0 is greater than or equal to the preset temperature t, the injection pulse width of the injector is controlled to be PW2, PW1>PW2.

[0021] The above-mentioned mixed fuel delivery method adopts the above-mentioned mixed fuel preheating method, which can avoid the special physical properties of the mixed fuel due to low temperature, improve the combustion efficiency of the mixed fuel, and in the above-mentioned mixed fuel preheating method, a gradient method is used to heat the mixed fuel in the oil pipeline, and when the temperature of the mixed fuel in the oil pipeline reaches the secondary temperature T2, the heating of the oil pipeline is stopped, which can avoid damage to the oil pipeline caused by too fast temperature change or too high temperature, so as to ensure the safety of the oil pipeline. In addition, the above-mentioned mixed fuel delivery method controls the injection pulse width of the injector based on the current temperature T0 and the preset temperature t, which can ensure stable power output.

[0022] The present application also provides a preheating system, including: A temperature detection module is provided in the oil pipeline and is used to obtain the current temperature T0 of the mixed fuel in the oil pipeline; A heating module, disposed on the oil pipeline, for electrically heating the oil pipeline; a control module, electrically connected to the temperature detection module to obtain the current temperature T0, the control module is used to compare the current temperature T0 with a preset temperature t, the control module is used to restart the temperature detection module when the current temperature T0 is greater than or equal to the preset temperature t, the control module is also electrically connected to the heating module, and is used to control the heating module to heat the oil pipeline with a primary current I1 when the current temperature T0 is less than the preset temperature t, the control module is also used to control the heating module to heat the oil pipeline with a secondary current I2 when the temperature of the mixed fuel in the oil pipeline reaches the primary temperature T1, and the control module is also used to control the heating module to stop heating the oil pipeline when the temperature of the mixed fuel in the oil pipeline reaches the secondary temperature T2; Among them, T2>T1, I2<I1.

[0023] In the above-mentioned preheating system, when the current temperature T0 of the mixed fuel in the oil pipeline is less than the preset temperature t, the control module controls the heating module to first heat the oil pipeline with the primary current I1, so as to achieve the temperature of the mixed fuel in the oil pipeline rising to the primary temperature T1 in a short time, and then heat the oil pipeline with the secondary current I2 which is less than the primary current I1, so as to maintain the temperature of the mixed fuel between the primary temperature T1 and the secondary temperature T2, 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 above-mentioned preheating system, the heating of the mixed fuel in the oil pipeline is realized in a gradient manner, and when the temperature of the mixed fuel in the oil pipeline reaches the secondary temperature T2, the heating of the oil pipeline is stopped, which can avoid damage to the oil pipeline caused by too fast temperature changes or too high temperature, so as to ensure the safety of the oil pipeline.

[0024] An embodiment of the present application also provides an automobile, including the above-mentioned preheating system, which can improve the combustion efficiency of the mixed fuel used in the automobile and ensure the safety of the oil pipeline that transports the mixed fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the process of preheating the mixed fuel according to an embodiment of the present application.

[0026] Figure 2 for Figure 1 The flowchart of step S100 in the mixed fuel preheating method is shown.

[0027] Figure 3 Schematic diagram of the architecture of the preheating system according to an embodiment of the present application.

[0028] Figure 4 This is a schematic diagram of a portion of the structure of a car according to an embodiment of the present application.

[0029] Description of main component symbols: automobile 1000, preheating system 100, fuel analyzer 101, parameter analyzer 102, temperature detection module 110, heating module 120, control module 130, fuel tank 140, low-pressure oil pump 150, oil pipeline 160, concentration detection module 170, high-pressure oil pump 180, fuel injection module 190. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] The following is a detailed description of various embodiments of the present invention in conjunction with the accompanying drawings.

[0033] See also Figure 1 The embodiment of the present application provides a mixed fuel preheating method for heating the mixed fuel in the oil pipeline to ensure that the temperature of the mixed fuel in the oil pipeline is not lower than a preset temperature t. The oil pipeline may be a fuel supply mechanism in a vehicle such as a car or a train, and correspondingly, the mixed fuel preheating method is applied to vehicles such as a car or a train. Preferably, the mixed fuel preheating method is applied to a car.

[0034] Exemplarily, the mixed fuel includes alcohols and refined oils, the alcohols include at least one of methanol and ethanol, and the refined oils include 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.

[0035] Therefore, by rationally configuring the components of the mixed fuel, the above-mentioned preheating method of the mixed fuel can be better applied.

[0036] It should be noted that the special physical properties of methanol and ethanol at low temperatures will be reflected differently in the mixed fuel, but the amount of carbon dioxide produced by the combustion of methanol and ethanol is basically equivalent to the amount of carbon dioxide consumed in their production process. Therefore, methanol and ethanol are both considered to be relatively clean fuels.

[0037] When the temperature of the mixed fuel is lower than a certain threshold, the mixed fuel will show stratification, turbidity, increased viscosity and other phenomena. In order to avoid the above phenomena in the mixed fuel, the above-mentioned preset temperature t is greater than the above-mentioned temperature threshold, so that the mixed fuel can be heated before stratification, turbidity, increased viscosity and other phenomena occur.

[0038] Further, the difference between the preset temperature t and the temperature threshold ranges between 3°C and 5°C, for example: 3°C, 4°C, 5°C. For example, when the temperature of the environment in which the oil pipeline is located is lower than a certain ambient temperature, the difference between the preset temperature t and the temperature threshold can be set to 5°C, and when the temperature of the environment in which the oil pipeline is located is greater than or equal to a certain ambient temperature, the difference between the preset temperature t and the temperature threshold can be set to 3°C.

[0039] See also Figure 1 , the preheating method of the mixed fuel includes: S100, obtaining the current temperature T0 of the mixed fuel in the oil pipeline.

[0040] Specifically, the current temperature T0 can be obtained by a temperature sensor. For example, the temperature sensor is installed on the oil pipeline and the detection end of the temperature sensor is inserted into the mixed fuel in the oil pipeline. Preferably, the detection end of the temperature sensor is located at the center of the mixed fuel along the radial direction of the oil pipeline, which can improve the accuracy of the temperature of the mixed fuel obtained by the temperature sensor.

[0041] S200, comparing the current temperature T0 with the preset temperature t.

[0042] Specifically, 10°C ≤ t ≤ 15°C, wherein t may be 10°C, 11°C, 12°C, 13°C, 14°C, or 15°C.

[0043] Therefore, by reasonably configuring the range of the preset temperature t, the preheating method of the mixed fuel can be improved to match the type of mixed fuel containing alcohol.

[0044] S300: If the current temperature T0 is greater than or equal to the preset temperature t, return to step S100 to obtain the current temperature T0 of the mixed fuel in the oil pipeline.

[0045] Specifically, when the current temperature T0 is greater than or equal to the preset temperature t, it indicates that the mixed fuel in the oil pipeline does not have stratification, turbidity, increased viscosity, etc. At this time, there is no need to heat the mixed fuel in the oil pipeline.

[0046] S400: If the current temperature T0 is lower than the preset temperature t, the oil pipeline is heated with the primary current I1 to increase the temperature of the mixed fuel in the oil pipeline.

[0047] Specifically, since the above-mentioned preheating method of the mixed fuel is applied to vehicles such as automobiles and trains, it is more convenient to heat the oil pipeline by electric heating.

[0048] S500, when the temperature of the mixed fuel in the oil pipeline reaches the primary temperature T1, the oil pipeline is heated with the secondary current I2 to increase the temperature of the mixed fuel in the oil pipeline again, wherein I2<I1.

[0049] Specifically, 30° C.≤T1≤35° C., and T1 may be 30° C., 31° C., 32° C., 33° C., 34° C., or 35° C. Therefore, by reasonably configuring the range of the preset temperature and the first temperature T1, the preheating method of the mixed fuel can be improved to match the type of the mixed fuel containing alcohol.

[0050] In some embodiments, the preheating method of the mixed fuel satisfies the relationship: 0.25I1≤I2≤0.5I1.

[0051] Exemplarily, I2 may be 0.25I1, 0.3I1, 0.35I1, 0.4I1, 0.45I1, or 0.5I1.

[0052] Therefore, by reasonably setting the magnitude relationship between the primary current I1 and the secondary current I2, the heating efficiency of the oil pipeline can be improved at a low cost. Specifically, if I2 < 0.2511, the period of the temperature of the mixed fuel in the oil pipeline rising from the primary temperature T1 to the secondary temperature T2 is too long compared to I2 ≥ 0.2511, resulting in low heating efficiency. If I2 > 0.511, the power of the required heating device is too high compared to I2 ≤ 0.511, resulting in an increase in the cost of maintaining the temperature of the mixed fuel in the oil pipeline between the primary temperature T1 and the secondary temperature T2.

[0053] S600, when the temperature of the mixed fuel in the oil pipeline reaches the secondary temperature T2, the heating of the oil pipeline is stopped, wherein T2>T1.

[0054] Specifically, 55°C ≤ T2 ≤ 60°C. T2 may be 55°C, 56°C, 57°C, 58°C, 59°C, or 60°C.

[0055] Therefore, by configuring the range of the secondary temperature T2, the preheating method of the mixed fuel can be improved to match the type of mixed fuel containing alcohol.

[0056] It should be noted that there is no sequential execution order among step S300 , step S400 , step S500 and step S600 , and the execution order of the four steps is in a parallel relationship.

[0057] In the above-mentioned preheating method for mixed fuel, when the current temperature T0 of the mixed fuel in the oil pipeline is less than the preset temperature t, the oil pipeline is first heated with the primary current I1 to achieve the temperature of the mixed fuel in the oil pipeline rising to the primary temperature T1 in a short time, and then the oil pipeline is heated with the secondary current I2 which is less than the primary current I1, so as to maintain the temperature of the mixed fuel between the primary temperature T1 and the secondary temperature T2, 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 above-mentioned preheating method for mixed fuel, a gradient method is used to heat the mixed fuel in the oil pipeline, and when the temperature of the mixed fuel in the oil pipeline reaches the secondary temperature T2, the heating of the oil pipeline is stopped, which can avoid damage to the oil pipeline caused by too fast temperature change or too high temperature, so as to ensure the safety of the oil pipeline.

[0058] See also Figure 1 In some embodiments, before obtaining the current temperature T0 of the mixed fuel in the oil pipeline in step S100, the method further includes: S010, determining the composition of the mixed fuel in the oil pipeline.

[0059] Specifically, the above determination method may be known by the supplier who fills the mixed fuel, or may be obtained through analysis by a component analyzer.

[0060] S020, determining a preset temperature t, a primary temperature T1, and a secondary temperature T2 based on the components of the mixed fuel.

[0061] Therefore, by determining the preset temperature t, the primary temperature T1 and the secondary temperature T2 according to the components of the mixed fuel, the formed step temperature can match the different components in the mixed fuel, thereby improving the heating efficiency of the mixed fuel.

[0062] In some embodiments, the method for preheating the mixed fuel further comprises: S030 , determining the primary current I1 and the secondary current I2 based on the composition of the mixed fuel and the preset temperature t, the primary temperature T1 and the secondary temperature T2 .

[0063] Therefore, through the above configuration, the primary current I1 and the secondary current I2 can better match the heating requirements of the mixed fuel, which is beneficial to improving the heating efficiency of the mixed fuel.

[0064] See also Figure 2 In some embodiments, step S100 of obtaining the current temperature T0 of the mixed fuel in the oil pipeline includes: S110, sequentially obtaining a plurality of detected temperatures T on the oil pipeline transportation path j .

[0065] Specifically, multiple temperature sensors are arranged at intervals on the transportation path of the oil pipeline, and multiple detection temperatures T are obtained in sequence through the multiple temperature sensors. j . Herein, multiple refers to three or more.

[0066] S120, calculate and obtain multiple detection temperatures T j Maximum detection temperature difference between each other T c .

[0067] Specifically, every two detected temperatures T j The detection temperatures between the two are taken as their absolute values ​​to avoid multiple detection temperatures T j The calculation order affects the maximum detection temperature difference T c Misjudgment occurred.

[0068] S130, compare the maximum detected temperature difference T c The temperature difference with the preset temperature T y .

[0069] S140, if the maximum detected temperature difference T c Greater than the preset temperature difference T y , then return to step S110 to sequentially obtain multiple detection temperatures T on the transportation path of the oil pipeline j .

[0070] Specifically, if the maximum detected temperature difference T c Greater than the preset temperature difference T y , it indicates that multiple detection temperatures T j If there is misdetected data between them, it is necessary to re-acquire multiple detection temperatures T j To ensure multiple detection temperatures T j accuracy.

[0071] S150, if the maximum detected temperature difference T c Less than or equal to the preset temperature difference T y , then calculate and obtain multiple detection temperatures T j The average value T p , where T p =T0.

[0072] Therefore, multiple detection temperatures T are obtained at multiple points in the oil pipeline. j Can improve the accuracy of temperature collection samples, multiple detection temperatures T j The average value T p The maximum detection temperature difference T c Less than or equal to the preset temperature difference T yIt can be calculated and obtained at the same time to avoid the problem of multiple detection temperatures T j The detection error affects the average value T p The accuracy of the current temperature T0 is improved.

[0073] The embodiment of the present application also provides a mixed fuel delivery method, including the mixed fuel preheating method as described in the above embodiment. If the current temperature T0 is less than the preset temperature t, the fuel injection pulse width of the fuel injector is controlled to be PW1. If the current temperature T0 is greater than or equal to the preset temperature t, the fuel injection pulse width of the fuel injector is controlled to be PW2, PW1>PW2.

[0074] Specifically, the mixed fuel delivery method is applied to vehicles such as cars and trains. Preferably, the mixed fuel delivery method is applied to cars.

[0075] It should be noted that the concentration of the mixed fuel will be different at different temperatures, that is, the effective components in the same volume of the mixed fuel are different at different temperatures. Specifically, based on the characteristics of the mixed fuel itself, it can be seen that the concentration of the mixed fuel when the current temperature T0 is less than the preset temperature t is less than the concentration of the mixed fuel when the current temperature T0 is greater than or equal to the preset temperature t. Therefore, in order to ensure stable power output, that is, the total mass of effective components of the mixed fuel output in the same time period is the same, the injection pulse width PW1 when the current temperature T0 is less than the preset temperature t needs to be greater than the injection pulse width PW2 when the current temperature T0 is greater than or equal to the preset temperature t.

[0076] Among them, the size of the injection pulse width PW1 and the injection pulse width PW2 can be obtained through multiple experimental tests of power output, and can also be set in a pre-set manner and continuously adjusted based on subsequent power output results. In addition, the current temperature T0 of the mixed fuel, the preset temperature t of the mixed fuel, the size of the injection pulse width PW1 and the injection pulse width PW2 and the control relationship are all pre-stored in the control system that controls the injector, and the control system is used to achieve: if the current temperature T0 is less than the preset temperature t, the injection pulse width of the injector is controlled to be PW1, and if the current temperature T0 is greater than or equal to the preset temperature t, the injection pulse width of the injector is controlled to be PW2.

[0077] The above-mentioned mixed fuel delivery method adopts the above-mentioned mixed fuel preheating method, which can avoid the special physical properties of the mixed fuel due to low temperature, improve the combustion efficiency of the mixed fuel, and in the above-mentioned mixed fuel preheating method, a gradient method is used to heat the mixed fuel in the oil pipeline, and when the temperature of the mixed fuel in the oil pipeline reaches the secondary temperature T2, the heating of the oil pipeline is stopped, which can avoid damage to the oil pipeline caused by too fast temperature changes or too high temperature, so as to ensure the safety of the oil pipeline. In addition, the above-mentioned mixed fuel delivery method controls the injection pulse width of the injector based on the relationship between the current temperature T0 and the preset temperature t, which can ensure stable power output.

[0078] See also Figure 3 The embodiment of the present application further provides a preheating system 100, including a temperature detection module 110, a heating module 120 and a control module 130. The preheating system 100 is applied to vehicles such as automobiles and trains. Preferably, the preheating system 100 is applied to automobiles.

[0079] Specifically, the temperature detection module 110 is arranged in the oil pipeline, and is used to obtain the current temperature T0 of the mixed fuel in the oil pipeline, so as to implement step S100 in the above-mentioned preheating method of the mixed fuel. Among them, the temperature detection module 110 may include a plurality of temperature sensors to cooperate with the control module 130 to implement steps S110 to S150 in the above-mentioned preheating method of the mixed fuel. The heating module 120 is arranged in the oil pipeline, and is used to energize and heat the oil pipeline. The control module 130 is electrically connected to the temperature detection module 110 to obtain the current temperature T0, so as to facilitate subsequent comparison. The control module 130 is used to compare the current temperature T0 with the preset temperature t, so as to implement step S200 in the above-mentioned preheating method of the mixed fuel. The control module 130 is used to restart the temperature detection module 110 when the current temperature T0 is greater than or equal to the preset temperature t, so as to implement step S200 in the above-mentioned preheating method of the mixed fuel. The control module 130 is also electrically connected to the heating module 120, and is used to control the heating module 120 to restart the temperature detection module 110 when the current temperature T0 is less than the preset temperature t. The control module 130 is further used to control the heating module 120 to heat the oil pipeline with the primary current I1 to implement step S400 in the above-mentioned preheating method of the mixed fuel. The control module 130 is further used to control the heating module 120 to heat the oil pipeline with the secondary current I2 when the temperature of the mixed fuel in the oil pipeline reaches the primary temperature T1 to implement step S500 in the above-mentioned preheating method of the mixed fuel. The control module 130 is further used to control the heating module 120 to stop heating the oil pipeline when the temperature of the mixed fuel in the oil pipeline reaches the secondary temperature T2 to implement step S600 in the above-mentioned preheating method of the mixed fuel. Wherein, T2>T1, I2<I1.

[0080] For further information, see Figure 3The 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 to analyze and determine the composition of the mixed fuel in the oil pipeline to implement step S010 in the preheating method of the mixed fuel. The parameter analyzer 102 is electrically connected to the control module 130 and is used to determine the preset temperature t, the primary temperature T1 and the secondary temperature T2 based on the composition of the mixed fuel to implement step S020 in the preheating method of the mixed fuel. The parameter analyzer 102 is also used to determine the primary current I1 and the secondary current I2 based on the composition of the mixed fuel, the preset temperature t, the primary temperature T1 and the secondary temperature T2 to implement step S030 in the preheating method of the mixed fuel.

[0081] In the above-mentioned preheating system 100, when the current temperature T0 of the mixed fuel in the oil pipeline is less than the preset temperature t, the control module 130 controls the heating module 120 to first heat the oil pipeline with the primary current I1, so as to achieve the temperature of the mixed fuel in the oil pipeline rising to T1 in a short time, and then heat the oil pipeline with the secondary current I2 which is less than the primary current I1, so as to maintain the temperature of the mixed fuel between the primary temperature T1 and the secondary temperature T2, 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 above-mentioned preheating system 100, the heating of the mixed fuel in the oil pipeline is realized in a gradient manner, and when the temperature of the mixed fuel in the oil pipeline reaches the secondary temperature T2, the heating of the oil pipeline is stopped, which can avoid damage to the oil pipeline caused by too fast temperature change or too high temperature, so as to ensure the safety of the oil pipeline.

[0082] See also Figure 4 The embodiment of the present application further provides a car 1000, comprising the above-mentioned preheating system 100. To further illustrate the state of the above-mentioned preheating system 100 when applied to the car 1000, a partial structural diagram of the car 1000 is used as an example for illustration.

[0083] Please continue to see Figure 4The automobile 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 fuel tank 140 is used to load the mixed fuel, the low-pressure fuel pump 150 extends into the mixed fuel in the fuel tank 140, the two ends of the fuel pipe 160 are respectively connected to the low-pressure fuel pump 150 and the fuel injection module 190, the heating module 120 in the preheating system 100 is installed on the fuel pipe 160, the temperature detection module 110 in the preheating system 100 is installed on the fuel pipe 160 and the detection end of the temperature detection module 110 extends into the fuel pipe 160, the control module 130 is a driving computer, and is electrically connected to the low-pressure fuel pump 150, the high-pressure fuel pump 180, and the fuel injection module 190 respectively, and the concentration detection module 170 is used to detect the concentration of the mixed fuel in the fuel pipe 160, so that the control module 130 controls the injection pulse width of the fuel injection module 190 based on the current concentration of the mixed fuel.

[0084] The preset system 100 in the above automobile can avoid the special physical properties 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 above automobile, a gradient method is used to heat the mixed fuel in the oil pipeline 160, and when the temperature of the mixed fuel in the oil pipeline 160 reaches the secondary temperature T2, the heating of the oil pipeline is stopped, which can avoid damage to the oil pipeline 160 caused by too fast temperature change or too high temperature, so as to ensure the safety of the oil pipeline 160 of the automobile 1000.

[0085] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A method for preheating a mixed fuel, characterized in that: include: Get the current temperature T0 of the mixed fuel in the oil pipeline; Comparing the current temperature T0 with a preset temperature t; If the current temperature T0 is greater than or equal to the preset temperature t, the step of obtaining the current temperature T0 of the mixed fuel in the oil pipeline is performed again; If the current temperature T0 is lower than the preset temperature t, the oil pipeline is heated with the primary current I1 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 T1, the oil pipeline is heated by the secondary current I2 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 T2, the heating of the oil pipeline is stopped; Among them, T2>T1, I2<I1.

2. The method for preheating a mixed fuel as claimed in claim 1, characterized in that: Before obtaining the current temperature T0 of the mixed fuel in the oil pipeline, the method further includes: Determine the composition of the fuel mixture in the pipeline; The preset temperature t, the primary temperature T1, and the secondary temperature T2 are determined based on the composition of the mixed fuel.

3. The method for preheating a mixed fuel as claimed in claim 2, characterized in that: The preheating method of the mixed fuel also includes: The primary current I1 and the secondary current I2 are determined based on the composition of the mixed fuel, the preset temperature t, the primary temperature T1, and the secondary temperature T2.

4. The method for preheating a mixed fuel according to claim 1, characterized in that: The preheating method of the mixed fuel satisfies the relationship: 0.25I1≤I2≤0.5I1.

5. The method for preheating a mixed fuel according to claim 1, characterized in that: The preheating method of the mixed fuel satisfies the relationship: 10℃≤t≤15℃, 30℃≤T1≤35℃, 55℃≤T2≤60℃.

6. The method for preheating a mixed fuel according to claim 1, characterized in that: The mixed fuel includes alcohols and refined oils, the alcohols include at least one of methanol and ethanol, and the refined oils include one of gasoline and diesel.

7. The method for preheating a mixed fuel according to claim 1, characterized in that: The step of obtaining the current temperature T0 of the mixed fuel in the oil pipeline includes: Multiple detected temperatures T are obtained in sequence along the oil pipeline transportation path. j ; Calculate and obtain multiple detection temperatures T j Maximum detection temperature difference between each other T c ; Compare the maximum detected temperature difference T c The temperature difference with the preset temperature T y ; If the maximum detected temperature difference T c Greater than the preset temperature difference T y , then return to the step of obtaining multiple detected temperatures T in sequence on the oil pipeline transportation path j ; If the maximum detected temperature difference T c Less than or equal to the preset temperature difference T y , then calculate and obtain multiple detection temperatures T j The average value T p , where T p =T0.

8. A method for delivering a mixed fuel, characterized in that: include: The method for preheating a mixed fuel as claimed in any one of claims 1 to 7; wherein: If the current temperature T0 is less than the preset temperature t, the injection pulse width of the fuel injector is controlled to be PW1; If the current temperature T0 is greater than or equal to the preset temperature t, the injection pulse width of the injector is controlled to be PW2, PW1>PW2.

9. A preheating system, characterized in that: include: A temperature detection module is provided in the oil pipeline and is used to obtain the current temperature T0 of the mixed fuel in the oil pipeline; A heating module, disposed on the oil pipeline, for electrically heating the oil pipeline; a control module, electrically connected to the temperature detection module to obtain the current temperature T0, the control module is used to compare the current temperature T0 with a preset temperature t, the control module is used to restart the temperature detection module when the current temperature T0 is greater than or equal to the preset temperature t, the control module is also electrically connected to the heating module, and is used to control the heating module to heat the oil pipeline with a primary current I1 when the current temperature T0 is less than the preset temperature t, the control module is also used to control the heating module to heat the oil pipeline with a secondary current I2 when the temperature of the mixed fuel in the oil pipeline reaches the primary temperature T1, and the control module is also used to control the heating module to stop heating the oil pipeline when the temperature of the mixed fuel in the oil pipeline reaches the secondary temperature T2; Among them, T2>T1, I2<I1.

10. An automobile, characterized in that: Comprising the preheating system as claimed in claim 9.

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