Hybrid fuel ratio measuring sensor, measuring method, engine system, and vehicle

Abstract

The application provides a mixed fuel proportion measuring sensor, a measuring method, an engine system and a vehicle. The engine system comprises a power supply, a fuel pipe and a polar pipe capacitor connected with the fuel pipe. The polar pipe capacitor comprises an outer electrode, an inner electrode and an insulation structure connected with the outer electrode and the inner electrode, so that the mixed fuel flows through the inner side of the inner electrode and the gap between the outer electrode and the inner electrode. The polar pipe capacitor is connected between the power supply and the ground end. The measuring method comprises: obtaining the charging time of the voltage of the polar pipe capacitor when reaching a set trigger voltage and the saturation voltage of the polar pipe capacitor. The trigger voltage is less than the saturation voltage. According to the trigger voltage, the charging time and the saturation voltage, the measured capacitance value of the polar pipe capacitor is determined. According to the measured capacitance value of the polar pipe capacitor, the concentration proportion of the mixed fuel is determined. The measuring method is simple.

Description

Technical Field

[0001] This application relates to the field of engine technology, and in particular to a mixed fuel ratio measurement sensor, measurement method, engine system, and vehicle. Background Technology

[0002] With the increasing popularity of new energy vehicles, hybrid vehicles have attracted widespread attention due to their more flexible fuel supply methods, allowing them to adjust the fuel supply ratio according to demand. However, some new energy vehicles employ complex methods for measuring the hybrid fuel ratio. Summary of the Invention

[0003] This application provides a novel fuel blending ratio measurement sensor, measurement method, engine system, and vehicle.

[0004] This application provides a mixed fuel ratio measurement sensor, including:

[0005] A diode capacitor includes an outer electrode, an inner electrode, and an insulating structure connecting the outer electrode and the inner electrode, so that the mixed fuel flows through the inner side of the inner electrode and the gap between the outer electrode and the inner electrode; the diode capacitor is used to connect between a power source and a ground terminal;

[0006] A voltage detection unit, electrically connected to the transistor capacitor, is used to detect the saturation voltage of the transistor capacitor; and

[0007] A sensor controller is electrically connected to the voltage detection unit; the sensor controller is used to acquire the charging time of the diode capacitor when the voltage reaches a set trigger voltage, and the saturation voltage of the diode capacitor; and to determine the measured capacitance value of the diode capacitor based on the trigger voltage, the charging time, and the saturation voltage; so as to determine the concentration ratio of the mixed fuel based on the measured capacitance value of the diode capacitor.

[0008] This application provides a method for measuring the proportion of mixed fuels in a vehicle engine system. The engine system includes a power source, a fuel pipeline, and an electrode capacitor connected to the fuel pipeline. The electrode capacitor includes an outer electrode, an inner electrode, and an insulating structure connecting the outer electrode and the inner electrode, allowing the mixed fuel to flow through the inner side of the inner electrode and the gap between the outer electrode and the inner electrode. The electrode capacitor is connected between the power source and a ground terminal. The measurement method includes:

[0009] The charging time of the transistor capacitor when the voltage reaches a set trigger voltage, and the saturation voltage of the transistor capacitor are obtained; wherein the trigger voltage is less than the saturation voltage;

[0010] The measured capacitance value of the transistor capacitor is determined based on the trigger voltage, the charging time, and the saturation voltage.

[0011] The concentration ratio of the mixed fuel is determined based on the measured capacitance value of the electrode capacitor.

[0012] Further, the engine system includes a voltage divider resistor connected in series with the diode capacitor; determining the measured capacitance value of the diode capacitor based on the trigger voltage, the charging time, and the saturation voltage includes:

[0013] The measured capacitance value of the diode capacitor is calculated using the following formula:

[0014] Where E represents the voltage value of the power supply, t represents the charging time, and U t U0 represents the trigger voltage, U0 represents the saturation voltage, and R1 represents the resistance value of the voltage divider resistor.

[0015] Further, determining the concentration ratio of the mixed fuel based on the measured capacitance value of the electrode capacitor includes:

[0016] Based on the obtained saturation voltage and the determined measured capacitance value, the measured capacitance value of the diode capacitance is corrected to obtain the corrected capacitance value;

[0017] The concentration ratio of the mixed fuel is determined based on the corrected capacitance value.

[0018] Further, the step of correcting the measured capacitance value of the transistor capacitor based on the acquired saturation voltage and the determined measured capacitance value to obtain a corrected capacitance value includes:

[0019] From the mapping relationship between the correction value, the saturation voltage reference value, and the capacitance value, determine the saturation voltage reference value that matches the acquired saturation voltage, and the correction value that matches the determined measured capacitance value;

[0020] The measured capacitance value of the diode capacitor is corrected using the correction value to obtain the corrected capacitance value.

[0021] Further, the measured capacitance value of the transistor capacitor is corrected using the correction value to obtain the corrected capacitance value, including: determining the corrected capacitance value based on the sum of the measured capacitance value of the transistor capacitor and the correction value.

[0022] Further, determining the concentration ratio of the mixed fuel based on the corrected capacitance value includes:

[0023] From the mapping relationship between the capacitance reference value and the concentration ratio reference value of the mixed fuel, the concentration ratio reference value of the mixed fuel corresponding to the capacitance reference value that matches the obtained corrected capacitance value is determined, and is used as the concentration ratio of the mixed fuel.

[0024] Further, obtaining the charging time of the transistor capacitor when the voltage reaches the set trigger voltage, and the saturation voltage of the transistor capacitor, includes:

[0025] Starting from the initial moment of charging the diode capacitor, the voltage of the diode capacitor is obtained after a set time is reached, and this voltage is used as the saturation voltage.

[0026] This application provides an engine system including a controller, a power supply, a fuel line, and a diode capacitor connected to the fuel line; the diode capacitor includes an outer electrode, an inner electrode, and an insulating structure connecting the outer electrode and the inner electrode to allow the mixed fuel to flow through the inner side of the inner electrode and the gap between the outer electrode and the inner electrode; the diode capacitor is connected between the power supply and a ground terminal; the controller is used to perform the mixed fuel ratio measurement method as described in any of the above claims.

[0027] Furthermore, it includes an engine and an engine controller, the controller being electrically connected to the engine controller, the engine controller being used to determine control parameters related to the operation of the engine based on the determined concentration ratio of the mixed fuel.

[0028] This application provides a vehicle including an engine system as described in any of the preceding claims, the engine system being used to provide the power required for the operation of the vehicle.

[0029] The mixed fuel ratio measurement method provided in this application allows the mixed fuel to flow through the inner electrode of a transistor capacitor and the gap between the outer electrode and the inner electrode. Therefore, different concentrations of the mixed fuel result in different dielectric constants and different capacitance values ​​for the transistor capacitor. This allows for the determination of the measured capacitance value based on the charging time when the voltage of the transistor capacitor reaches a set trigger voltage, as well as the saturation voltage of the transistor capacitor. The concentration ratio of the mixed fuel can then be determined based on the measured capacitance value of the transistor capacitor. This measurement method is simple.

[0030] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0032] Figure 1 The diagram shown is a schematic diagram of an engine system according to an embodiment of this application;

[0033] Figure 2 As shown Figure 1 The diagram shows a three-dimensional representation of the electrode capacitors and some fuel lines in the engine system.

[0034] Figure 3 As shown Figure 2 The diagram shows a cross-sectional view of a transistor capacitor.

[0035] Figure 4 As shown Figure 1 The circuit diagram of the engine system shown is shown.

[0036] Figure 5 The diagram shown is a schematic diagram of a fuel blending ratio measurement sensor according to an embodiment of this application;

[0037] Figure 6 The figure shown is a graph showing the voltage versus time relationship of a transistor capacitor according to an embodiment of this application.

[0038] Figure 7 The diagram shown is a flowchart of a method for measuring the proportion of blended fuels according to an embodiment of this application;

[0039] Figure 8 As shown Figure 7 The flowchart shown is a sub-flowchart of the method for measuring the proportion of blended fuels.

[0040] Figure 9 As shown Figure 8 The flowchart shown is a sub-flowchart of the method for measuring the proportion of blended fuels. Detailed Implementation

[0041] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0042] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and / or "upper," etc., are for ease of description only and are not limited to a location or spatial orientation. The terms "comprising" or "including," etc., mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms "connected," "linked," etc., are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect.

[0043] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0044] This application provides a vehicle, which may be a new energy vehicle. The vehicle includes an engine system for providing the power required for vehicle operation.

[0045] See Figure 1 and Figure 2 As shown, this application provides an engine system 10. The engine system 10 includes a controller 11, a power supply 12, a fuel line 13, and a diode capacitor 15 connected to the fuel line 13.

[0046] The controller 11 can be electrically connected to the diode capacitor 15. The controller 11 is used to perform a method for measuring the proportion of blended fuels. The controller 11 can be a sensor controller 26 (such as...). Figure 5 (As shown). Blended fuel can refer to a mixture of methanol and gasoline. The blending ratio can refer to the mass concentration of methanol in a methanol-gasoline blend.

[0047] See Figure 2 and Figure 3As shown, the electrode capacitor 15 includes an outer electrode 16, an inner electrode 17, and an insulating structure 18 connecting the outer electrode 16 and the inner electrode 17, allowing the mixed fuel to flow through the inner side of the inner electrode 17 and the gap 19 between the outer electrode 16 and the inner electrode 17. The outer electrode 16 and the inner electrode 17 can be conductive materials, and the insulating structure 18 can be insulating materials. The cross-sections of the outer electrode 16 and the inner electrode 17 can be circular, so that the outer electrode 16 can be sleeved on the outside of the inner electrode 17 and concentrically arranged with the inner electrode 17, forming a pipe with a circular cross-section. The inner side of the inner electrode 17 and the gap 19 between the outer electrode 16 and the inner electrode 17 are all connected to the fuel pipe 13. The fuel pipe 13 can draw mixed fuel from the engine fuel tank, and after passing through the electrode capacitor 15, deliver the mixed fuel to the engine's fuel rail. This allows the mixed fuel passing through fuel pipe 13 to flow through the inner side of inner electrode 17 and the gap 19 between outer electrode 16 and inner electrode 17, and to fill the gap 19 between inner electrode 17 and outer electrode 16.

[0048] See Figure 3 and Figure 4 As shown, the transistor capacitor 15 is connected between the power supply 12 and the ground terminal GND. The power supply 12 can be a DC power supply that powers the transistor capacitor 15. In this embodiment, the inner electrode 17 of the transistor capacitor 15 is electrically connected to the power supply 12, and the inner electrode 17 of the transistor capacitor 15 is also electrically connected to the ground terminal GND. This makes the inner electrode 17 equivalent to the positive terminal of the transistor capacitor 15, and the outer electrode 16 equivalent to the negative terminal of the transistor capacitor 15.

[0049] See you again Figure 1 As shown, in some embodiments, the engine system 10 includes an engine 21 and an engine controller 20. The controller 11 is electrically connected to the engine controller 20. The controller 11 can be used to feed back the fuel mixture ratio to the engine controller 20. The engine controller 20 is used to determine control parameters related to the operation of the engine 21 based on the determined fuel mixture concentration ratio. These control parameters include at least one of the following: the fuel injection quantity of the engine 21's injectors, the fuel injection timing of the engine 21's injectors, and the ignition timing of the engine 21's igniter, to ensure that the engine 21 operates at its optimal state and to prevent engine damage and noise generation. Determining the fuel mixture concentration ratio in this way ensures smooth engine operation and improves engine performance.

[0050] See Figure 5 As shown, this application provides a mixed fuel ratio measurement sensor 24, which includes a diode capacitor 15, a voltage detection unit 25, and a sensor controller 26.

[0051] The voltage detection unit 25 is connected to the diode capacitor 15 and is used to detect the saturation voltage of the diode capacitor 15. The saturation voltage of the diode capacitor 15 can be detected by the voltage detection unit 25, and the charging time when the set trigger voltage is reached can be determined by the timer built into the sensor controller 26.

[0052] Sensor controller 26 is electrically connected to voltage detection unit 25. Sensor controller 26 acquires the charging time of the diode capacitor 15 when it reaches a set trigger voltage, as well as the saturation voltage of the diode capacitor 15. Based on the trigger voltage, charging time, and saturation voltage, it determines the measured capacitance value of the diode capacitor 15, and then determines the concentration ratio of the mixed fuel based on the measured capacitance value of the diode capacitor 15. Different concentrations of the mixed fuel result in different dielectric constants, and thus different capacitance values ​​for the diode capacitor 15. Therefore, sensor controller 26 can determine the measured capacitance value of the diode capacitor 15 based on the trigger voltage, charging time, and saturation voltage, and then determine the concentration ratio of the mixed fuel based on the measured capacitance value of the diode capacitor 15, making the measurement method simple.

[0053] See Figure 3 , Figure 4 and Figure 7 As shown, this application provides a method for measuring the proportion of mixed fuels for use in the engine system 10 of a vehicle. The method for measuring the proportion of mixed fuels includes steps S101 to S103.

[0054] In step S101, the charging time of the diode capacitor 15 when it reaches a set trigger voltage, and the saturation voltage of the diode capacitor 15 are obtained. The trigger voltage is less than the saturation voltage. The voltage of the diode capacitor 15 connected to the power supply 12 can be obtained using a voltage sensor. The charging time can be obtained using a timer. In some embodiments, the engine system 10 includes a voltage divider resistor 22 connected in series with the diode capacitor 15. The charging time of the diode capacitor 15 after voltage division by the voltage divider resistor 22 when it reaches the set trigger voltage can be obtained.

[0055] In some embodiments, the charging time is measured from the initial moment of charging the diode capacitor 15 until the voltage of the diode capacitor 15 reaches a set trigger voltage. The trigger voltage can be a fixed value, and the set trigger voltage is always less than the saturation voltage of the mixed fuel at any ratio after passing through the diode capacitor 15.

[0056] In some embodiments, step S101 includes: starting from the initial moment of charging the diode capacitor 15, and after reaching a set time, acquiring the voltage of the diode capacitor 15 as the saturation voltage. Since the diode capacitor 15 charges relatively quickly, the set time can be a fixed value. Starting from the initial moment of charging the diode capacitor 15, after reaching the set time, any proportion of the mixed fuel can reach the saturation voltage after passing through the diode capacitor 15.

[0057] See Figure 6 As shown, the voltage of transistor capacitor 15 can gradually increase over time until it reaches the saturation voltage. Timing can be started from the initial moment of charging transistor capacitor 15 to obtain the voltage at which the set trigger voltage U is reached. t The charging time is defined as time t1. Starting from the initial charging moment of transistor capacitor 15, the voltage of transistor capacitor 15 is obtained when the set time t2 is reached, and this voltage is taken as the saturation voltage U0. This facilitates the determination of when transistor capacitor 15 reaches the set trigger voltage U. t The time t1 and the saturation voltage U0 of the transistor capacitor 15.

[0058] In some embodiments, the engine system 10 includes a resistor 23 connected in parallel with the diode capacitor 15. One end of the resistor 23 is connected to the power supply 12, and the other end is connected to the ground terminal GND. The resistor 23 can quickly discharge the electrical energy stored across the diode capacitor 15 when the power supply is stopped.

[0059] In step S102, the measured capacitance value of transistor capacitor 15 is determined based on the trigger voltage, charging time, and saturation voltage. The measured capacitance value of transistor capacitor 15 can be calculated using a formula.

[0060] exist Figure 4 In the illustrated embodiment, the measured capacitance value of transistor capacitor 15 is determined based on the trigger voltage, charging time, and saturation voltage, including:

[0061] The measured capacitance value C of transistor capacitor 15 is calculated using the following formula:

[0062] Where E represents the voltage value of power supply 12, t represents the charging time, and U t U0 represents the trigger voltage, R1 represents the saturation voltage, and R1 represents the resistance of voltage divider resistor 22. Power supply 12 can supply power to the circuit with a fixed charging voltage E. The trigger voltage U0 can be determined based on the obtained voltage. t The measured capacitance C of transistor capacitor 15 is obtained by using the above formula, based on the charging time t, saturation voltage U0, and the known resistance value R1 of voltage divider resistor 22. The calculation method is simple and convenient for determining the measured capacitance value of transistor capacitor 15.

[0063] In step S103, the concentration ratio of the mixed fuel is determined based on the measured capacitance value of the electrode capacitor 15. The mixed fuel can flow through the inner side of the inner electrode 17 and the gap 19 between the outer electrode 16 and the inner electrode 17, filling the gap 19. Thus, the mixed fuel can serve as the internal dielectric of the electrode capacitor 15. Since the measured capacitance value of the electrode capacitor 15 is determined by the electrode structure and the dielectric constant of the internal dielectric, under the condition of a fixed electrode structure, the measured capacitance value of the electrode capacitor 15 is related to the dielectric constant of the mixed fuel. Different concentration ratios of mixed fuel have different dielectric constants, thus the concentration ratio of the mixed fuel can be determined based on the measured capacitance value of the electrode capacitor 15.

[0064] The mixed fuel ratio measurement method provided in this application allows the mixed fuel to flow through the inner side of the inner electrode 17 of the electrode capacitor 15 and the gap 19 between the outer electrode 16 and the inner electrode 17. Therefore, different concentrations of the mixed fuel result in different dielectric constants and different capacitance values ​​for the electrode capacitor 15. This allows for the determination of the measured capacitance value of the electrode capacitor 15 based on the charging time when the voltage of the electrode capacitor 15 reaches a set trigger voltage, as well as the saturation voltage of the electrode capacitor 15. The concentration ratio of the mixed fuel can then be determined based on the measured capacitance value of the electrode capacitor 15. This measurement method is simple. Furthermore, because the electrode capacitor 15 charges quickly and in a short time, using this measurement method to determine the concentration ratio of the mixed fuel can effectively reduce the electrochemical corrosion of the electrode structure, making the electrode capacitor more durable.

[0065] See Figure 8 As shown, in some embodiments, the concentration ratio of the mixed fuel is determined based on the measured capacitance value of the diode capacitor 15, including steps S201 to S202.

[0066] In step S201, based on the acquired saturation voltage and the determined measured capacitance value, the measured capacitance value of the electrode capacitor 15 is corrected to obtain a corrected capacitance value. Taking a mixture of methanol solution and gasoline solution as an example, since methanol solution can dissolve salts and ions, the dissolved salts and ions will increase the conductivity of the mixed fuel, thus lowering the acquired saturation voltage of the electrode capacitor 15. The measured capacitance value determined in this way will be higher than the actual capacitance value, leading to inaccurate determination of the mixed fuel concentration ratio. This results in poor engine operating stability and a risk of damage. The measured capacitance value of the electrode capacitor 15 can be corrected based on the acquired saturation voltage and the determined measured capacitance value, allowing for a secondary correction to ensure a more accurate corrected capacitance value. This allows for the acquisition of different saturation voltages and determination of different measurement capacitance values ​​for mixed fuels with different conductivity, thereby correcting the measurement capacitance value of the diode capacitor 15. This provides a higher tolerance for uncontrollable impurities in the mixed fuel. Furthermore, in mixed fuels of methanol solution and gasoline solution, the application of methanol fuel additives will not have a significant impact on the measurement accuracy.

[0067] In step S202, the concentration ratio of the mixed fuel is determined based on the correction capacitor value. This allows for the determination of the mixed fuel concentration ratio using the correction capacitor value obtained after measuring the capacitance value of the correction diode capacitor 15, resulting in a more accurate determination of the mixed fuel concentration ratio and thus ensuring the reliability of engine operation.

[0068] See Figure 9 As shown, in some embodiments, based on the acquired saturation voltage and the determined measured capacitance value, the measured capacitance value of the transistor capacitor 15 is corrected to obtain the corrected capacitance value, including steps S301 to S302.

[0069] In step S301, from the mapping relationship between the correction value, the saturation voltage reference value, and the capacitance value, a saturation voltage reference value that matches the acquired saturation voltage and a correction value that matches the determined measured capacitance value are determined.

[0070] In some embodiments, from a set of data containing saturation voltage reference values ​​and capacitance values, a saturation voltage reference value matching the acquired saturation voltage and a capacitance value matching the determined measured capacitance value are determined. Based on the determined saturation voltage reference value and capacitance value, a matching data set is determined. Then, in the mapping relationship between data sets and correction values, a correction value corresponding to the matching data set is determined.

[0071] In some other embodiments, a saturation voltage reference value matching the acquired saturation voltage and a capacitance value matching the determined measured capacitance value are determined from a data table of correction values, saturation voltage reference values, and capacitance values. Then, a corresponding correction value is determined based on the determined saturation voltage reference value and capacitance value.

[0072] The matching mentioned above can refer to equality or approximation. From the mapping relationship between the correction value, the saturation voltage reference value, and the capacitance value, a saturation voltage reference value that is equal to or approximates the acquired saturation voltage, and a correction value corresponding to a capacitance value that is equal to or approximates the determined measured capacitance value, can be determined. Specifically, the difference method can be used to determine the saturation voltage reference value approximating the acquired saturation voltage, and the capacitance value approximating the determined measured capacitance value; other methods can also be used, and this application does not impose any limitations.

[0073] In step S302, the measured capacitance value of the diode capacitor 15 is corrected using a correction value to obtain a corrected capacitance value. In some embodiments, correcting the measured capacitance value of the diode capacitor 15 using a correction value to obtain a corrected capacitance value includes: determining the corrected capacitance value based on the sum of the measured capacitance value of the diode capacitor 15 and the correction value. The corresponding correction value can be positive or negative. Taking a mixed fuel consisting of methanol solution and gasoline solution as an example, when the methanol solution is a very pure solution, the correction value can be positive; when the methanol solution contains dissolved salts and ions, the correction value can be negative. The measured capacitance value can be corrected based on the sum of the measured capacitance value of the diode capacitor 15 and the correction value, making the obtained corrected capacitance value more accurate.

[0074] In some embodiments, determining the concentration ratio of the mixed fuel based on the corrected capacitance value includes: determining a reference value for the concentration ratio of the mixed fuel corresponding to the capacitance reference value that matches the obtained corrected capacitance value from a mapping relationship between capacitance reference values ​​and mixed fuel concentration ratio reference values, and using this value as the concentration ratio of the mixed fuel. The capacitance reference value matching the corrected capacitance value can be determined from a data table of capacitance reference values ​​and mixed fuel concentration ratio reference values; based on the matching capacitance reference value, the concentration ratio reference value of the mixed fuel corresponding to the matching capacitance reference value is determined, and used as the concentration ratio of the mixed fuel. Different corrected capacitance values ​​correspond to different proportions of the mixed fuel. Taking a mixed fuel consisting of methanol solution and gasoline solution as an example, a higher corrected capacitance value corresponds to a higher mass concentration of methanol solution in the mixed fuel. This allows for rapid determination of the concentration ratio of the mixed fuel based on the corrected capacitance value; the method is simple and easy to implement.

[0075] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0076] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A mixed fuel ratio measurement sensor, characterized in that, include: A diode capacitor includes an outer electrode, an inner electrode, and an insulating structure connecting the outer electrode and the inner electrode, so that the mixed fuel flows through the inner side of the inner electrode and the gap between the outer electrode and the inner electrode; the diode capacitor is used to connect between a power source and a ground terminal; A voltage detection unit, which is electrically connected to the diode capacitor, is used to detect the saturation voltage of the diode capacitor; and A sensor controller is electrically connected to the voltage detection unit; the sensor controller is used to acquire the charging time of the diode capacitor when the voltage reaches a set trigger voltage, and the saturation voltage of the diode capacitor; and to determine the measured capacitance value of the diode capacitor based on the trigger voltage, the charging time, and the saturation voltage; and to determine the concentration ratio of the mixed fuel based on the measured capacitance value of the diode capacitor. Based on the obtained saturation voltage and the determined measured capacitance value, the measured capacitance value of the diode capacitance is corrected to obtain the corrected capacitance value; The concentration ratio of the mixed fuel is determined based on the corrected capacitance value.

2. A method for measuring the proportion of blended fuels, characterized in that, An engine system for a vehicle includes a power source, a fuel line, and a diode capacitor connected to the fuel line; the diode capacitor includes an outer electrode, an inner electrode, and an insulating structure connecting the outer electrode and the inner electrode to allow the mixed fuel to flow through the inside of the inner electrode and the gap between the outer electrode and the inner electrode. The diode capacitor is connected between the power supply and the ground terminal; the measurement method includes: The charging time of the transistor capacitor when the voltage reaches a set trigger voltage, and the saturation voltage of the transistor capacitor are obtained; wherein the trigger voltage is less than the saturation voltage; The measured capacitance value of the transistor capacitor is determined based on the trigger voltage, the charging time, and the saturation voltage. The concentration ratio of the mixed fuel is determined based on the measured capacitance value of the electrode capacitor. Based on the obtained saturation voltage and the determined measured capacitance value, the measured capacitance value of the diode capacitance is corrected to obtain the corrected capacitance value; The concentration ratio of the mixed fuel is determined based on the corrected capacitance value.

3. The method according to claim 2, characterized in that, The engine system includes a voltage divider resistor connected in series with the diode capacitor; determining the measured capacitance value of the diode capacitor based on the trigger voltage, the charging time, and the saturation voltage includes: The measured capacitance value of the diode capacitor is calculated using the following formula: C = ; Where E represents the voltage value of the power supply. This indicates the charging time. This refers to the trigger voltage. This represents the saturation voltage. This indicates the resistance value of the voltage divider resistor.

4. The method according to claim 2, characterized in that, The step of correcting the measured capacitance value of the transistor based on the acquired saturation voltage and the determined measured capacitance value to obtain a corrected capacitance value includes: From the mapping relationship between the correction value, the saturation voltage reference value, and the capacitance value, determine the saturation voltage reference value that matches the acquired saturation voltage, and the correction value that matches the determined measured capacitance value; The measured capacitance value of the diode capacitor is corrected using the correction value to obtain the corrected capacitance value.

5. The method according to claim 4, characterized in that, Using the correction value, the measured capacitance value of the transistor capacitor is corrected to obtain the corrected capacitance value, including: determining the corrected capacitance value based on the sum of the measured capacitance value of the transistor capacitor and the correction value.

6. The method according to claim 2, characterized in that, Determining the concentration ratio of the mixed fuel based on the corrected capacitance value includes: From the mapping relationship between the capacitance reference value and the concentration ratio reference value of the mixed fuel, determine the concentration ratio reference value of the mixed fuel that matches the obtained corrected capacitance value, and use it as the concentration ratio of the mixed fuel.

7. The method according to claim 2, characterized in that, Obtaining the charging time of the transistor capacitor when the voltage reaches the set trigger voltage, and the saturation voltage of the transistor capacitor, includes: Starting from the initial moment of charging the diode capacitor, the voltage of the diode capacitor is obtained after a set time is reached, and this voltage is used as the saturation voltage.

8. An engine system, characterized in that, The device includes a controller, a power supply, a fuel pipeline, and a diode capacitor connected to the fuel pipeline; the diode capacitor includes an outer electrode, an inner electrode, and an insulating structure connecting the outer electrode and the inner electrode to allow the mixed fuel to flow through the inner side of the inner electrode and the gap between the outer electrode and the inner electrode; the diode capacitor is connected between the power supply and a ground terminal; the controller is used to perform the mixed fuel ratio measurement method as described in any one of claims 4 to 7.

9. The engine system according to claim 8, characterized in that, It includes an engine and an engine controller, the controller being electrically connected to the engine controller, the engine controller being used to determine control parameters related to the operation of the engine based on a determined concentration ratio of the mixed fuel.

10. A vehicle, characterized in that, Includes the engine system as described in any one of claims 8 to 9, the engine system being used to provide the power required for the operation of the vehicle.

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