Learning-type fuel injection solenoid valve control method

Abstract

The present application discloses a control method for a learning-type refueling solenoid valve. By collecting the valve body closing data of the main and auxiliary valves during each refueling process and calculating the mean value of multiple groups of collected data, the closing advance amounts of the main and auxiliary valves are continuously corrected and adjusted, avoiding interference of the valve bodies of the main and auxiliary valves by the external electromagnetic environment or the pressure of the submerged pump, solving the technical problem of errors in the control of the refueling amount in the prior art. While reducing the metering error, by optimizing and adjusting the closing advance amounts of the main and auxiliary valves, it is avoided that the closing advance amount of the main valve is too large, thereby improving the refueling efficiency.

Description

Technical Field

[0001] This application relates to the technical field of fuel filling equipment, and particularly relates to a learning-based fueling solenoid valve control method. Background Art

[0002] The solenoid valve plays a very important role in fuel filling equipment, and the control accuracy of the solenoid valve directly affects the accuracy of the measured fuel volume. The controlled solenoid valve installed in the pipeline of the fuel filling equipment receives the instruction of the controller and controls the fuel filling volume through opening and closing. Since the controlled solenoid valve cannot be immediately closed after receiving the control instruction and sudden closing is likely to cause impact on the pipeline, it will affect the filling accuracy and the service life of the fuel filling equipment.

[0003] A method for realizing fuel filling volume control known to the inventors is: setting a main solenoid valve with a large flow rate and a sub-solenoid valve with a small flow rate in the fuel filling pipeline, and realizing rough control of the filling volume through the main solenoid valve, supplemented by the sub-solenoid valve to realize further accurate control of the filling volume. During filling, all solenoid valves are energized and opened, that is, the large flow valve (main valve) and the small flow valve (sub-valve) are both opened. However, since there is still a certain time difference in the process from the coil control circuit of the large flow valve (main valve) and the small flow valve (sub-valve) receiving the valve closing signal to the actual valve body closing, in order to eliminate the influence of this time difference on the filling volume accuracy, a valve body closing advance amount is set. When the preset fuel filling volume reaches the advance amount for closing the large flow valve (main valve), the meter control main board sends a signal to close the large flow valve (main valve), closes the large flow valve (main valve), and the small flow valve (sub-valve) continues to fill until the preset amount, then closes the small flow valve (sub-valve), and the fuel filling ends.

[0004] However, during the process of implementing the technical solution in the embodiment of this application, the inventors of this application found that the above technology has at least the following technical problems:

[0005] To reduce the overshoot of fuel filling, although the method of closing the valve in advance by a certain time is adopted to improve the accuracy of fuel filling, due to the relatively complex use environment of the fuel dispenser, the solenoid valve spool will be affected by factors such as magnetic field intensity and submersible pump pressure, resulting in a distribution error in the closing time of the main and sub-valves under the influence of the individual differences of the solenoid valves and the pressure of the valve closing spring, which will in turn affect the efficiency of the fuel dispenser and the accuracy of metering.

[0006] The information disclosed in this background art section is only used to deepen the understanding of the background art of this disclosure, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0007] The inventor found through research that the reason for the inaccurate measurement of the fuel dispenser is that the solenoid valve spool is affected by factors such as the ambient magnetic field and the pressure of the submerged pump, resulting in inconsistent response times of the main / auxiliary solenoid valves and fluctuations. Therefore, the constant early closing amounts of the main and auxiliary valves cannot adapt to the changes in the surrounding electromagnetic environment or the influence of the submerged pump pressure on the closing times of the main and auxiliary valves, leading to inaccurate filling measurement. Moreover, due to the inability to accurately control the closing time of the main valve, in order to ensure the accuracy of filling measurement, the main valve will be closed earlier. After the main valve is closed for a period of time, the auxiliary valve will be closed. By using the time margin between the closing of the main valve and the start of the closing of the auxiliary valve, a certain degree of interference from the external environment can be offset. However, the early closing of the main valve will result in a reduction in filling efficiency.

[0008] In view of at least one of the above technical problems, the present disclosure provides a learning-type fuel dispenser solenoid valve control method. By recording and processing the response data of the main and auxiliary valves during each filling, and continuously correcting the early closing amount accordingly, the technical problem in the prior art that the spools of the main and auxiliary solenoid valves are affected by the surrounding environment and have errors, thereby affecting the accuracy of fuel filling measurement, is solved.

[0009] According to one aspect of the present disclosure, a learning-type fuel dispenser solenoid valve control method is provided, including the following steps:

[0010] (1) Set the early closing amounts TF1 and TF2 of the main and auxiliary valves respectively;

[0011] (2) Set the filling amount L1, and the main and auxiliary valves are opened simultaneously for fuel filling; at the same time, the metering system starts to calculate the fuel filling amount L2 and the fuel filling flow rate V in real time;

[0012] (3) Determine whether the set early closing amount TF1 of the main valve is reached. Until the set early closing amount TF1 of the main valve is reached, close the main valve, and record the current time TC1n, n = 1, 2...;

[0013] (4) Determine whether the fuel flow rate is constant after closing the main valve. Until a constant flow rate is reached, record the current time TS1n, calculate and record the main valve closing time T1n = TS1n - TC1n, n = 1, 2...;

[0014] (5) Calculate the average value TA1 of the main valve closing times recorded for each filling;

[0015] (6) Determine whether the set early closing amount TF2 of the auxiliary valve is reached. Until the set early closing amount TF2 of the auxiliary valve is reached, close the auxiliary valve, and record the current time TC2n, n = 1, 2...;

[0016] (7) Determine whether the auxiliary valve is completely closed. Until the auxiliary valve is completely closed, record the current time TS2n, calculate and record the closing time of the auxiliary valve T2n = TS2n - TC2n, where n = 1, 2...;

[0017] (8) According to the data of the closing time of the auxiliary valve recorded each time of refueling, calculate the average value TA2 of the closing time of the main valve;

[0018] (9) After refueling ends, correct the closing advance amounts of the main and auxiliary valves. Let the closing advance amount of the main valve TF1 = TA1 + TA2, and let the closing advance amount of the auxiliary valve TF2 = TA2.

[0019] In some embodiments of the present disclosure, in the step (1), the closing advance amount TF1 of the main valve is greater than the closing advance amount TF2 of the auxiliary valve.

[0020] In some embodiments of the present disclosure, in the step (3), based on the fueling amount L2 and the flow rate V calculated in real time by the metering system in step (2), calculate the time T required for the remaining fuel to be refueled L1 - L2 in real time, T = (L1 - L2) / V. Compare whether T is equal to the closing advance amount TF1 of the main valve, and thereby determine whether the set closing advance amount TF1 of the main valve is reached.

[0021] In some embodiments of the present disclosure, in the step (5), take the most recent 100 data including the current closing time data of the main valve to calculate the average value TA1.

[0022] In some embodiments of the present disclosure, in the step (6), based on the fueling amount L2 and the flow rate V calculated in real time by the metering system, calculate the time T required for the remaining fuel to be refueled L1 - L2 in real time, T = (L1 - L2) / V. Compare whether T is equal to the closing advance amount TF2 of the auxiliary valve, and thereby determine whether the set closing advance amount TF2 of the auxiliary valve is reached.

[0023] In some embodiments of the present disclosure, in the step (8), take the most recent 100 data including the current closing time data of the auxiliary valve to calculate the average value TA2.

[0024] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0025] By collecting the valve body closing data of the main and auxiliary valves during each refueling process and calculating the mean value of multiple groups of collected data, continuously correct and adjust the closing advance amounts of the main and auxiliary valves, avoiding interference of the main and auxiliary valve bodies by the external electromagnetic environment or the pressure of the submersible pump, solving the technical problem of errors in fueling amount control in the prior art. While reducing the metering error, by optimizing and adjusting the closing advance amounts of the main and auxiliary valves, avoiding excessive closing advance amount of the main valve, and thus improving the refueling efficiency. Brief Description of the Drawings

[0026] Figure 1 This is a flowchart of the control method for a learning type refueling solenoid valve in an embodiment of the present application.

[0027] Figure 2 This is the ideal response curve of the solenoid valve in an embodiment of the present application.

[0028] Figure 3 This is the actual response curve of the learning type refueling solenoid valve in an embodiment of the present application. Detailed Description of the Embodiment

[0029] The programs involved or relied on in the following embodiments are all conventional programs or simple programs in this technical field, and those skilled in the art can make conventional selections or adaptive adjustments according to specific application scenarios.

[0030] To better understand the technical solution of the present application, the above technical solution will be described in detail below in conjunction with the drawings of the specification and specific embodiments.

[0031] This example discloses a control method for a learning type refueling solenoid valve, see Figure 1 , which includes the following steps:

[0032] (1) Set the closing advance amounts TF1 and TF2 of the main valve and the auxiliary valve respectively.

[0033] Set the closing advance amounts TF1 and TF2 of the main valve and the auxiliary valve in the control system respectively according to experience. Among them, since the oil flow rate through the main valve is larger and the oil flow rate through the auxiliary valve is relatively smaller, in order to achieve precise control of the filling volume, when the filling volume is about to reach the set oil filling volume, the fuel dispenser controller first closes the large-flow main valve in advance according to the set advance amount TF1. At this time, the large-flow filling pipeline where the main valve is located has been closed, and the remaining oil to be filled is controlled by the small-flow auxiliary valve to avoid overshoot caused by excessive flow. Therefore, it is necessary to ensure that TF1 > TF2, that is, the auxiliary valve is closed after the main valve. In addition, in some other embodiments, the first filling is a test filling, and the closing advance amounts TF1 and TF2 of the main valve and the auxiliary valve are set arbitrarily, and the closing advance amount is adjusted according to the action data of the main valve and the auxiliary valve in this filling through the subsequent steps.

[0034] (2) Set the filling volume L1, and the main valve and the auxiliary valve are opened simultaneously for oil filling; at the same time, the metering system starts to calculate the refueling volume L2 and the refueling flow rate V in real time.

[0035] After setting the closing advance amounts TF1 and TF2 of the main valve and the auxiliary valve, when the fuel filling volume is input into the fuel dispenser control panel, after the fuel dispenser controller receives the filling instruction, it controls the main valve and the auxiliary valve to open simultaneously for fuel filling. Meanwhile, the sensors installed on the oil pipeline perform real-time measurement and monitoring on the flow rate and velocity of the oil in the pipeline.

[0036] (3) Determine whether the set closing advance amount TF1 of the main valve is reached. Until the set closing advance amount TF1 of the main valve is reached, close the main valve and record the current time TC1n, where n = 1, 2...

[0037] To determine whether the set closing advance amount TF1 of the main valve is reached, it is necessary to estimate the end time of refueling. In this embodiment, the end time of refueling is estimated based on the fuel filling volume and flow velocity obtained in real time by the sensor in step (2). The fuel dispenser controller calculates the remaining fuel to be filled as L1 - L2 according to the initially set fuel filling volume L1 and the fuel volume L2 that has been filled and sensed in real time by the sensor. At this time, according to the real-time flow velocity V obtained by the sensor, the time T required to fill the remaining fuel to be filled at the current fuel filling speed is estimated as T = (L1 - L2) / V. Compare this time T with the closing advance amount TF1 of the main valve to determine whether they are equal. Until the time T continuously decreases to be equal to the closing advance amount TF1 of the main valve during the filling process, it indicates that the closing advance amount of the main valve is reached. The controller controls the main valve to act and close the valve. And at this time, record the time TC1n when the valve closing instruction is issued, where n = 1, 2..., and n represents the nth fuel filling operation.

[0038] (4) After closing the main valve, determine whether the oil flow velocity is constant. Until a constant flow velocity is reached, record the current time TS1n, calculate and record the main valve closing time T1n = TS1n - TC1n, where n = 1, 2...

[0039] After receiving the valve closing control instruction sent by the fuel dispenser, the main valve without closing lead will gradually close. Since there are mechanical actions during the closing of the valve body, it takes a certain amount of time for it to close. During the process of the valve body closing from fully open to fully closed, the oil will flow out of the main valve that is not fully closed under the pressure of the oil pump, resulting in overshoot of the oil, making the filling measurement inaccurate. Therefore, a closing lead needs to be set to offset the impact on the filling volume caused by the certain process of the valve body closing through early closing of the valve body. In addition, on the one hand, if the early closing amount is too large, the main valve with a large flow rate will close in advance, and all the remaining oil to be filled will be filled through the auxiliary valve with a small flow rate. Since the flow rate of the auxiliary valve is small, that is, the filling is slow, it will further cause the delay of the end of filling and reduce the filling efficiency of the fuel dispenser; on the other hand, if the early closing amount is too small, the main valve with a large flow rate cannot be fully closed within the set early closing time, resulting in oil that should not be output flowing out of the valve body of the main valve that is not fully closed, ultimately leading to overshoot of the oil and inaccurate filling measurement.

[0040] Therefore, the setting of the early closing amount of the valve body is related to the valve body closing time, and it is necessary to ensure that the early closing amount of the valve body is consistent with the valve body closing time to avoid the reduction of filling efficiency caused by the premature closing of the main valve or overshoot caused by the too late closing. To obtain the time required for the valve body to close, the moment TS1n when the main valve is fully closed needs to be recorded. During the closing process of the main valve, the flow rate in the fuel pipeline behind the main valve will change. After the main valve is fully closed, the flow rate in the pipeline is no longer affected by the main valve. Therefore, the moment when the oil flow rate is constant is used as the moment TS1n when the main valve closes. And in step (3), the moment TC1n when the valve closing instruction is sent has been recorded. Therefore, the time T1n consumed for the main valve to close can be calculated as T1n = TS1n - TC1n, n = 1, 2...; where n represents the nth fuel filling operation. Because during each filling operation, the electromagnetic environment around the fuel dispenser and the working state of the submerged oil pump are different. If affected by factors such as surrounding electromagnetic interference or changes in the pressure of the submerged oil pump, the closing time of the solenoid valve will not be constant. Therefore, the time T1n consumed for the main valve to close during each filling is recorded.

[0041] (5) Calculate the average value TA1 of the main valve closing time based on the data of the main valve closing time recorded for each filling.

[0042] Since the solenoid valve may be interfered by different factors each time refueling is carried out, in order to eliminate the influence of special factors on the time consumed for the main solenoid valve to close in individual cases and make the time consumed for the main valve to close representative and adaptable, a method of averaging the main valve closing times T1n recorded for each refueling is adopted, that is, making the main valve closing time TA1 = (T11 + T12 + ······ + T1n) / n, and using this main valve closing time TA1 as a reference for the main valve closing time during the next refueling, so as to correct and adjust the lead amount.

[0043] In this embodiment, in order to better reflect the working state of the fuel dispenser in the recent period, further improve the reliability of the data, and avoid the interference of early data, the most recent 100 data including the current main valve closing time data are taken for the calculation of the average value TA1, making the data more representative, capable of reflecting the latest working state of the solenoid valve, and reducing the corresponding calculation amount.

[0044] (6) Judge whether the set closing lead amount TF2 of the sub-valve is reached. Until the set closing lead amount TF2 of the sub-valve is reached, close the sub-valve, and record the current moment TC2n, n = 1, 2...;

[0045] After the main valve is completely closed, at this time the sub-valve is still in the fully open state until the set fuel quantity is refueled. Since the closing of the sub-valve is not instantaneous and also requires a certain closing time, therefore, the closing lead amount TF2 of the sub-valve needs to be set. Among them, if the closing lead amount of the sub-valve is too large, it will cause the sub-valve to be completely closed before the refueling is completed, resulting in the refueling quantity not reaching the set value and affecting the accuracy of refueling measurement; if the closing lead amount of the sub-valve is too small, it will cause the sub-valve not to be completely closed when the refueling quantity has reached the set refueling quantity, and there will still be oil flowing out of the sub-valve, resulting in overshoot. Therefore, the determination of the closing lead amount TF2 of the sub-valve is related to the valve closing time of the sub-valve, so that when the sub-valve is completely closed, the refueling of the corresponding set fuel quantity is accurately completed. For this reason, the time consumed for the sub-valve to close is statistically calculated.

[0046] To judge whether the set closing lead amount TF2 of the sub-valve is reached, the remaining fuel quantity to be refueled L1 - L2 can be calculated in real time through the fuel quantity L2 and flow rate V statistically calculated by the metering system, then the refueling time T required for the remaining fuel quantity to be refueled is T = (L1 - L2) / V, and compare whether T is equal to the closing lead amount TF2 of the sub-valve, so as to judge whether the set closing lead amount TF2 of the sub-valve is reached. When T is equal to the closing lead amount TF2 of the sub-valve, the fuel dispenser controller issues a control command to control the sub-valve to close, and record the moment TC2n when the valve closing command is issued, n = 1, 2..., where n represents the nth fuel product refueling operation.

[0047] (7) Determine whether the auxiliary valve is fully closed. Until the auxiliary valve is fully closed, record the current time TS2n, calculate and record the closing time T2n of the auxiliary valve, where T2n = TS2n - TC2n, and n = 1, 2,....

[0048] After the closing control instruction of the auxiliary valve is issued, the auxiliary valve will gradually close within a period of time. At this time, it is judged whether the auxiliary valve is fully closed by the flow rate of the oil in the pipeline. When the auxiliary valve is fully closed, record the current time TS2n. Through the time TC2n when the valve closing instruction is issued recorded in step (6), the closing time T2n of the auxiliary valve can be calculated as T2n = TS2n - TC2n, where n = 1, 2,..., and n represents the nth oil filling operation.

[0049] (8) According to the data of the closing time of the auxiliary valve recorded each time, calculate the average value TA2 of the closing time of the main valve.

[0050] Similarly, the operation of the auxiliary valve is also affected by factors such as the surrounding electromagnetic environment and the pressure of the submersible pump. Therefore, in order to eliminate the influence of the valve body closing time in the interference environment on the overall valve body closing data, the recorded closing times of each auxiliary valve are averaged, that is, let the closing time of the auxiliary valve TA2 = (T21 + T22 + ······ + T2n) / n, and use this closing time TA2 of the auxiliary valve as a reference for the closing time of the auxiliary valve during the next filling, so as to correct and adjust the lead.

[0051] In this embodiment, in order to better reflect the working state of the fuel dispenser in the recent period of time, the average value TA2 is calculated by taking the latest 100 data including the current closing time data of the auxiliary valve, making the data more representative, reflecting the latest working state of the solenoid valve, and reducing the corresponding calculation amount.

[0052] (9) When refueling is completed, correct the closing lead of the main and auxiliary valves. Let the closing lead of the main valve TF1 = TA1 + TA2, and let the closing lead of the auxiliary valve TF2 = TA2.

[0053] Through the calculation of the average closing time of the main valve and the auxiliary valve in steps (5) and (8) respectively, the representative valve body closing times TA1 and TA2 can be obtained. Since the main valve closes earlier than the auxiliary valve, and in order to improve the filling efficiency, let the closing lead of the main valve TF1 = TA1 + TA2, and let the closing lead of the auxiliary valve TF2 = TA2, that is, the auxiliary valve closes immediately after the main valve closes, avoiding the time margin between the full closing of the main valve and the start of closing of the auxiliary valve in the prior art, achieving precise control of the valve body and improving the filling efficiency; and because TA1 and TA2 contain the past valve body closing data, that is, by learning the valve body closing data, the time required for valve closing is obtained, and based on this, the closing leads of the main and auxiliary valve bodies for the next refueling are set, achieving the effects of improving the filling efficiency and metering accuracy.

[0054] It has been verified that, referring to Figures 2 - 3 , after the solenoid valve is corrected and regulated by this method, on the premise of ensuring the accuracy of the filling volume, the time required to close the valve basically meets the requirements of the ideal closing advance, achieving the effect of improving the filling efficiency.

[0055] Although some preferred embodiments of the present invention application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present invention application.

[0056] Obviously, those skilled in the art can make various changes and modifications to the present invention application without departing from the spirit and scope of the present invention. Thus, if these modifications and variations to the present invention application fall within the scope of the claims of this application and their equivalent technologies, the present invention application is also intended to include these modifications and variations.

Claims

1. A learning type fuel injection solenoid valve control method, characterized in that, It includes the following steps: (1) Set the closing advance amounts TF1 and TF2 of the main valve and the auxiliary valve respectively; (2) Set the filling amount L1, and the main valve and the auxiliary valve are opened simultaneously for oil product filling; meanwhile, the metering system starts to calculate the refueling amount L2 and the refueling flow rate V in real time; (3) Judge whether the set closing advance amount TF1 of the main valve is reached. Until the set closing advance amount TF1 of the main valve is reached, close the main valve, and record the current time TC1n, where n = 1, 2...; (4) Judge whether the oil product flow rate is constant after the main valve is closed. Until a constant flow rate is reached, record the current time TS1n, and calculate and record the main valve closing time T1n = TS1n - TC1n, where n = 1, 2...; (5) Calculate the average value TA1 of the main valve closing time according to the main valve closing time data recorded for each filling; (6) Judge whether the set closing advance amount TF2 of the auxiliary valve is reached. Until the set closing advance amount TF2 of the auxiliary valve is reached, close the auxiliary valve, and record the current time TC2n, where n = 1, 2...; (7) Judge whether the auxiliary valve is completely closed. Until the auxiliary valve is completely closed, record the current time TS2n, and calculate and record the auxiliary valve closing time T2n = TS2n - TC2n, where n = 1, 2...; (8) Calculate the average value TA2 of the main valve closing time according to the auxiliary valve closing time data recorded for each filling; (9) When the refueling ends, correct the closing advance amounts of the main valve and the auxiliary valve. Let the closing advance amount TF1 of the main valve = TA1 + TA2, and let the closing advance amount TF2 of the auxiliary valve = TA2.

2. The learning type fuel injection solenoid valve control method according to claim 1, characterized in that In the step (1), the closing advance amount TF1 of the main valve is greater than the closing advance amount TF2 of the auxiliary valve.

3. The learning type fuel injection solenoid valve control method according to claim 1, characterized in that In the step (3), calculate the time T = (L1 - L2) / V required for the remaining oil to be filled in real time through the refueling amount L2 and the flow rate V statistically calculated by the metering system in real time in the step (2), and compare whether T is equal to the closing advance amount TF1 of the main valve, so as to judge whether the set closing advance amount TF1 of the main valve is reached.

4. The learning type fuel injection solenoid valve control method according to claim 1, wherein In the step (5), take the latest 100 data including the current main valve closing time data for calculating the average value TA1.

5. The learning type refueling solenoid valve control method according to claim 1, characterized in that, In the step (6), calculate the time T = (L1 - L2) / V required for the remaining oil to be filled in real time through the refueling amount L2 and the flow rate V statistically calculated by the metering system in real time, and compare whether T is equal to the closing advance amount TF2 of the auxiliary valve, so as to judge whether the set closing advance amount TF2 of the auxiliary valve is reached.

6. The learning type fuel injection solenoid valve control method according to claim 1, characterized in that In the step (8), take the latest 100 data including the current auxiliary valve closing time data for calculating the average value TA2.

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