A method of controlling a methanol injector and related apparatus

Abstract

The application discloses a methanol injector control method and related device, which can be applied to a computer device with methanol injector control capability, and the method comprises the following steps: acquiring a normal voltage parameter and a reverse pulling voltage parameter; according to the normal voltage parameter, a needle valve of the methanol injector is pulled up by applying a normal voltage indicated by the normal voltage parameter; in the process of falling of the needle valve, according to the reverse pulling voltage parameter, a reverse pulling voltage indicated by the reverse pulling voltage parameter is applied to the needle valve to exert an acting force corresponding to the reverse pulling voltage on the needle valve. Thus, by applying the reverse pulling voltage indicated by the reverse pulling voltage parameter, an acting force is exerted on the needle valve, so that the needle valve is subjected to an acting force opposite to the falling direction in the falling process, the speed of the needle valve falling to the valve seat is reduced, the impact degree on the valve seat is reduced, the wear problem of the valve seat caused by high-speed impact is reduced, the service life of the methanol injector is prolonged, and the reliability of the methanol injector is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engines, in particular to a methanol injector control method and related device. BACKGROUND

[0002] With the increasing requirements for environmental protection and energy efficiency, methanol as a clean energy not only has the advantage of less emissions after combustion, but also has a wide source, which can effectively alleviate the problem of fossil fuel shortage. The application of methanol in engines is increasingly valued, and the reliability of methanol injectors as the core component of methanol engines is very important.

[0003] In related technologies, the electromagnetic effect caused by the applied voltage is usually used to improve the needle valve control of fuel injection in the methanol injector. However, after the voltage is applied, the needle valve falling process will cause the valve seat reliability of the methanol injector to decrease. SUMMARY

[0004] To solve the above problems, the present application provides a methanol injector control method and related device to solve the problem that the needle valve falling process will cause the valve seat reliability of the methanol injector to decrease after the voltage is applied.

[0005] Based on this, the present application discloses the following technical solutions:

[0006] In a first aspect, the present application provides a methanol injector control method, which comprises:

[0007] obtaining a regular voltage parameter and a counter-pulling voltage parameter;

[0008] According to the regular voltage parameter, a regular voltage indicated by the regular voltage parameter is applied to pull up a needle valve of a methanol injector, the needle valve being a component for controlling fuel injection;

[0009] During the falling process of the needle valve, according to the counter-pulling voltage parameter, a counter-pulling voltage indicated by the counter-pulling voltage parameter is applied to exert an action force corresponding to the counter-pulling voltage on the needle valve, the direction of the action force being opposite to the falling direction of the needle valve.

[0010] Optionally, the counter-pulling voltage parameter comprises a first counter-pulling voltage parameter and a second counter-pulling voltage parameter, and the step of exerting an action force corresponding to the counter-pulling voltage on the needle valve according to the counter-pulling voltage parameter by applying a counter-pulling voltage indicated by the counter-pulling voltage parameter comprises:

[0011] According to the first counter-pulling voltage parameter, a first counter-pulling voltage indicated by the first counter-pulling voltage parameter is applied to exert an action force corresponding to the first counter-pulling voltage on the needle valve;

[0012] After the first pull-back voltage indicated by the first pull-back voltage parameter is applied to the needle valve, a second pull-back voltage corresponding to the second pull-back voltage parameter is applied to the needle valve.

[0013] Optionally, the step of applying the second pull-back voltage corresponding to the second pull-back voltage parameter to the needle valve after the first pull-back voltage indicated by the first pull-back voltage parameter is applied to the needle valve comprises:

[0014] After the first pull-back voltage indicated by the first pull-back voltage parameter is applied to the needle valve, a falling speed of the needle valve is obtained.

[0015] According to the falling speed, the second pull-back voltage parameter is adjusted to obtain a third pull-back voltage parameter.

[0016] A third pull-back voltage corresponding to the third pull-back voltage parameter is applied to the needle valve by applying the third pull-back voltage indicated by the third pull-back voltage parameter.

[0017] Optionally, the pull-back voltage parameter comprises a pull-back voltage value, and the pull-back voltage value is obtained by the following method:

[0018] A first corresponding relationship between a pressure difference value and the pull-back voltage value is obtained, and the pressure difference value is used to represent a difference between the fuel pressure and the intake pressure, the fuel pressure is a force acting on the needle valve in the falling direction, and the intake pressure is a force acting on the needle valve in the opposite direction of the falling direction.

[0019] According to the pressure difference value, the pull-back voltage value is determined based on the first corresponding relationship, and in the first corresponding relationship, the greater the pressure difference value is, the greater the pull-back voltage value is.

[0020] According to the pull-back voltage parameter, a pull-back voltage corresponding to the pull-back voltage parameter is applied to the needle valve by applying the pull-back voltage indicated by the pull-back voltage parameter.

[0021] According to the pull-back voltage value, a pull-back voltage corresponding to the pull-back voltage value is applied to the needle valve by applying the pull-back voltage according to the pull-back voltage value.

[0022] Optionally, the pull-back voltage parameter comprises the pull-back voltage value, a waiting time length and a maintaining time length, the waiting time length is a time interval between the end of the application of the normal voltage and the start of the application of the pull-back voltage, and the maintaining time length is a time length during which the pull-back voltage is continuously applied, and the waiting time length and the maintaining time length are obtained by the following method:

[0023] obtaining a second correspondence relationship between the pressure difference value and the waiting time length, a third correspondence relationship between the pressure difference value and the maintaining time length, and the pressure difference value;

[0024] determining the waiting time length according to the pressure difference value and based on the second correspondence relationship, in which the greater the pressure difference value is, the shorter the waiting time length is;

[0025] determining the maintaining time length according to the pressure difference value and based on the third correspondence relationship, in which the greater the pressure difference value is, the shorter the maintaining time length is;

[0026] applying, according to the pull-back voltage parameter, the pull-back voltage corresponding to the pull-back voltage indicated by the pull-back voltage parameter, includes:

[0027] waiting for the waiting time length after the end of applying the pull-back voltage indicated by the pull-back voltage parameter according to the waiting time length;

[0028] in response to the end of the waiting process, applying, according to the maintaining time length, the pull-back voltage corresponding to the pull-back voltage value by maintaining the maintaining time length to apply the pull-back voltage.

[0029] Optionally, the method further includes:

[0030] if the waiting time length is greater than or equal to a first preset time length, increasing the maintaining time length to obtain an updated maintaining time length, the first preset time length being used to represent that the waiting time length is too long;

[0031] if the waiting time length is less than or equal to a second preset time length, decreasing the initial maintaining time length to obtain the updated maintaining time length, the second preset time length being used to represent that the waiting time length is too short, and the second preset time length being less than the first preset time length;

[0032] if the waiting time length is greater than the second preset time length and less than the first preset time length, determining the maintaining time length as the updated maintaining time length;

[0033] the response to the end of the waiting process, the maintaining time length, according to the pull-back voltage value, by maintaining the maintaining time length to apply the pull-back voltage, includes:

[0034] in response to the end of the waiting process, according to the updated maintaining time length, by maintaining the updated maintaining time length, according to the pull-back voltage value, applying the pull-back voltage, applying the pull-back voltage corresponding to the pull-back voltage to the needle valve.

[0035] In a second aspect, the present application provides a methanol injector control device, the device comprising: an acquisition unit, a pull-up unit and a pull-down unit;

[0036] The acquisition unit is configured to acquire a normal voltage parameter and a pull-down voltage parameter.

[0037] The pull-up unit is configured to pull up a needle valve of the methanol injector by applying a normal voltage indicated by the normal voltage parameter according to the normal voltage parameter, the needle valve being a component for controlling fuel injection.

[0038] The pull-down unit is configured to apply an action force corresponding to a pull-down voltage to the needle valve by applying the pull-down voltage indicated by the pull-down voltage parameter according to the pull-down voltage parameter during a falling process of the needle valve, a direction of the action force being opposite to a falling direction of the needle valve.

[0039] In a third aspect, the present application provides a computer device, the computer device comprising a processor and a memory:

[0040] The memory is configured to store a computer program and transmit the computer program to the processor.

[0041] The processor is configured to execute the method according to any one of the first aspect according to the computer program.

[0042] In a fourth aspect, the present application provides a computer readable storage medium, the computer readable storage medium being configured to store a computer program, the computer program being configured to execute the method according to any one of the first aspect.

[0043] In a fifth aspect, the present application provides a computer program product comprising a computer program, characterized in that when the computer program is run on a computer device, the computer device is caused to execute the method according to any one of the first aspect.

[0044] From the above technical solutions, the present application has at least the following beneficial effects:

[0045] The present application does not allow the needle valve to freely fall and impact the valve seat after the voltage driving is completed, but applies an action force during the falling process to reduce the impact and wear of the valve seat, which will be described in detail below.

[0046] The acquisition of the normal voltage parameter and the anti-pulling voltage parameter can ensure that the control process of the methanol injector is accurately performed according to the voltage parameter indication. According to the normal voltage parameter, the needle valve of the methanol injector is pulled up by applying the normal voltage indicated by the normal voltage parameter, and the methanol is injected based on the pulling up of the needle valve, so as to ensure the fuel supply requirement of the methanol engine. During the falling of the needle valve, according to the anti-pulling voltage parameter, an acting force is applied to the needle valve by applying the anti-pulling voltage indicated by the anti-pulling voltage parameter, so that the needle valve receives an acting force in the opposite direction during the falling process, the speed of the needle valve falling to the valve seat is reduced, the impact degree on the valve seat is reduced, the wear problem of the valve seat caused by high-speed impact is reduced, thereby prolonging the service life of the methanol injector and improving the reliability of the methanol injector. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0048] Figure 1 A methanol injector cross-sectional view is provided for the present application;

[0049] Figure 2 A waveform diagram of a normal voltage is provided for the present application;

[0050] Figure 3 A method flowchart of a methanol injector control method is provided for the present application;

[0051] Figure 4 A waveform diagram of an anti-pulling voltage is provided for the present application;

[0052] Figure 5 A device structure diagram of a methanol injector control device is provided for the present application;

[0053] Figure 6 A structure diagram of a computer equipment is provided for the present application. DETAILED DESCRIPTION

[0054] The embodiments of the present application will be described in detail below with reference to the drawings. Although some embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms, and should not be interpreted as being limited to the embodiments described herein, on the contrary, these embodiments are provided for a more thorough and complete understanding of the present application. It should be understood that the drawings and embodiments of the present application are only for exemplary purposes, and are not intended to limit the protection scope of the present application.

[0055] As used herein, the term "including" and its variations are open-ended, i.e., "including but not limited to." The term "based on" means "based, at least in part, on." The term "one embodiment" means "at least one embodiment," the term "another embodiment" means "at least one additional embodiment," and the term "some embodiments" means "at least some embodiments." Other terms are defined in the following description.

[0056] The methanol injector control method provided in this application can be applied to computer devices capable of controlling methanol injectors, such as terminal devices and servers. Specifically, the terminal device can be an electronic control unit, a desktop computer, or the like; the server can be a standalone physical server, a server cluster composed of multiple physical servers, or a distributed system. The terminal device and server can be connected directly or indirectly via wired or wireless communication, which is not a limitation of this application.

[0057] See also Figure 1 , Figure 1 This is a cross-sectional diagram of a methanol injector provided in this application. An elastic member 101 is connected to a needle valve 102. Applying a voltage lifts the needle valve (the voltage acts on the elastic member, thereby lifting the needle valve), initiating fuel injection. When the voltage application ends, the needle valve falls onto the valve seat 103. During fuel injection, in addition to the force corresponding to the voltage, the needle valve is also subject to environmental factors such as the fuel pressure in the same direction as its downward movement and the intake pressure in the opposite direction.

[0058] See also Figure 2 , Figure 2 A waveform diagram of a conventional voltage provided for this application. The conventional voltage may include a high-potential voltage and a low-potential voltage. The high-potential voltage is used to quickly pull up the needle valve, and the low-potential voltage is used to maintain the pulled-up state of the needle valve. It can be seen that after the conventional voltage is applied, the conventional voltage value quickly drops to 0 volts (V), so the force corresponding to the conventional voltage will quickly disappear, and the needle valve will fall freely, and will fall towards the valve seat at a very high speed, causing great wear on the valve seat, thereby affecting the service life of the valve seat and causing a decrease in the reliability of the methanol injector.

[0059] Therefore, the present application provides a methanol injector control method and related devices. The present application no longer allows the needle valve to fall freely and impact the valve seat after the voltage drive ends, but applies force during the falling process to reduce the impact and wear on the valve seat and improve the reliability of the methanol injector. The details are explained below.

[0060] The conventional voltage parameter and the anti-pulling voltage parameter are acquired, so that the control process of the methanol injector can be accurately performed according to the voltage parameters. According to the conventional voltage parameter, a conventional voltage indicated by the conventional voltage parameter is applied to pull up the needle valve of the methanol injector, so that the methanol is injected based on the pulling up of the needle valve, and the fuel supply requirement of the methanol engine is ensured. During the falling of the needle valve, according to the anti-pulling voltage parameter, an anti-pulling voltage indicated by the anti-pulling voltage parameter is applied to the needle valve, so that the needle valve is subjected to a force opposite to the falling direction during the falling, the speed of the needle valve falling to the valve seat is reduced, the impact on the valve seat is reduced, the wear problem of the valve seat caused by high-speed impact is reduced, the service life of the methanol injector is prolonged, and the reliability of the methanol injector is improved.

[0061] Referring to Figure 3 , Figure 3 A method flowchart of a methanol injector control method provided in the application can include S301-S303.

[0062] S301: acquiring a conventional voltage parameter and an anti-pulling voltage parameter.

[0063] The conventional voltage parameter is a parameter set for indicating a conventional voltage application process, and the anti-pulling voltage parameter is a parameter set for indicating an anti-pulling voltage application process.

[0064] S302: according to the conventional voltage parameter, a conventional voltage indicated by the conventional voltage parameter is applied to pull up the needle valve of the methanol injector.

[0065] The needle valve is a component for controlling fuel injection.

[0066] According to the conventional voltage parameter, an instruction is sent to the methanol injector to generate a force for pulling up the needle valve through electromagnetic action. The conventional voltage can generally include a high-voltage for quickly pulling up the needle valve and a low-voltage for maintaining the pulled-up state of the needle valve. For example, according to the conventional voltage parameter, a high-voltage of 50V is applied to quickly pull up the needle valve, and then a low-voltage of 25V is applied to maintain the pulled-up state of the needle valve. In response to the pulling up of the needle valve, the fuel starts to be injected.

[0067] When the conventional voltage application ends, the voltage value generally returns to 0V, the needle valve is no longer subjected to the force for pulling up corresponding to the conventional voltage, and starts to fall under the action of gravity. Thus, by applying the conventional voltage indicated by the conventional voltage parameter, the needle valve of the methanol injector is pulled up, and the methanol is injected based on the pulling up of the needle valve, so that the fuel supply requirement of the methanol engine is ensured.

[0068] S303: during the falling of the needle valve, according to the anti-pulling voltage parameter, an anti-pulling voltage indicated by the anti-pulling voltage parameter is applied to the needle valve to apply a force corresponding to the anti-pulling voltage to the needle valve.

[0069] In response to the end of the application of the regular voltage, the needle valve begins to fall under the action of gravity. During the falling of the needle valve, according to the anti-pulling voltage parameter, an instruction is sent to the methanol injector to generate a force for delaying the falling speed of the needle valve through electromagnetic action. The direction of the force is opposite to the falling direction of the needle valve.

[0070] For example, according to the anti-pulling voltage parameter, 10 milliseconds (ms) after the end of the application of the regular voltage, the application of the anti-pulling voltage begins. The falling speed of the needle valve is 5 meters per second (m / s). The anti-pulling voltage of 20V is applied. The application of the anti-pulling voltage of 20V to the needle valve corresponds to a force. The falling speed of the needle valve is 3 m / s. Thus, the speed of the needle valve falling into the valve seat is smaller than the speed of the needle valve falling into the valve seat without the application of the anti-pulling voltage.

[0071] Referring to Figure 4 , Figure 4 A waveform diagram of the application of the anti-pulling voltage is provided. After the end of the application of the regular voltage, the anti-pulling voltage is applied for a waiting time. The maintained time is a maintained time. By applying the anti-pulling voltage, a force opposite to the falling direction of the needle valve is applied to the needle valve. The speed of the needle valve falling into the valve seat is reduced. The impact on the valve seat is reduced. The degree of wear of the valve seat is reduced. The reliability of the methanol injector is improved.

[0072] Therefore, the application provides a methanol injector control method. Instead of allowing the needle valve to freely fall and impact the valve seat after the end of the voltage driving, a force is applied during the falling to reduce the impact and wear on the valve seat. The reliability of the methanol injector is improved. The following is a specific description.

[0073] The regular voltage parameter and the anti-pulling voltage parameter are obtained. The control process of the methanol injector can be accurately performed according to the voltage parameters. According to the regular voltage parameter, the needle valve of the methanol injector is pulled up by applying the regular voltage indicated by the regular voltage parameter. Methanol is injected based on the pulling up of the needle valve. The fuel supply demand of the methanol engine is ensured. During the falling of the needle valve, according to the anti-pulling voltage parameter, a force is applied to the needle valve by applying the anti-pulling voltage indicated by the anti-pulling voltage parameter. The needle valve receives a force opposite to the falling direction during the falling. The speed of the needle valve falling into the valve seat is reduced. The impact on the valve seat is reduced. The wear problem of the valve seat caused by high-speed impact is reduced. Thus, the service life of the methanol injector is prolonged. The reliability of the methanol injector is improved.

[0074] The application provides a way of applying a multi-section anti-pulling voltage. Referring to A1-A2:

[0075] A1: According to the first anti-pulling voltage parameter, a first anti-pulling voltage corresponding to the first anti-pulling voltage is applied to the needle valve by applying the first anti-pulling voltage indicated by the first anti-pulling voltage parameter.

[0076] The first pull-back voltage parameter is a parameter set indicating a first pull-back voltage application process.

[0077] A2: After the first pull-back voltage indicated by the first pull-back voltage parameter is applied, a second pull-back voltage corresponding to an action force is applied to the needle valve by applying a second pull-back voltage indicated by a second pull-back voltage parameter.

[0078] The second pull-back voltage parameter is a parameter set indicating a second pull-back voltage application process. The second pull-back voltage application process is later than the first pull-back voltage application process.

[0079] For example, according to the first pull-back voltage parameter and the second pull-back voltage parameter, in the process of falling of the needle valve, a first pull-back voltage of 6V is applied first, and maintained for 5ms, and 2ms after the first pull-back voltage application ends, a second pull-back voltage of 4V is applied, and maintained for 2ms, and the falling speed of the needle valve is continuously slowed down.

[0080] By applying a plurality of pull-back voltages, the falling speed of the needle valve can be slowed down more accurately and multiple times, so that the process of falling of the needle valve can be slowed down more smoothly, thereby reducing the impact on the valve seat.

[0081] In a possible implementation, the application also provides a specific implementation of applying a plurality of pull-back voltages, see B1-B3:

[0082] B1: After the first pull-back voltage indicated by the first pull-back voltage parameter is applied, the falling speed of the needle valve is obtained.

[0083] The falling speed is the speed of the needle valve in the falling process, which can be obtained by a sensor or other monitoring device. For example, immediately after the first pull-back voltage is applied, the falling speed of the needle valve is obtained as 2m / s.

[0084] B2: The second pull-back voltage parameter is adjusted according to the falling speed to obtain a third pull-back voltage parameter.

[0085] By adjusting the second pull-back voltage parameter, a third pull-back voltage parameter suitable for the current working condition can be obtained. For example, when the falling speed is too large, the voltage value of the second pull-back voltage can be increased, and when the falling speed is too small, the voltage value of the second pull-back voltage can be reduced to prevent the second pull-back voltage value from being too large to produce a pull-up effect and instead increase the impact on the valve seat.

[0086] The application does not limit the waveform of the pull-back voltage. The waveform of the third pull-back voltage can include a straight line descending waveform, a stepped descending waveform, an oblique line descending waveform, etc. The stepped descending waveform and the stepped descending waveform more stably slow down the falling speed of the needle valve.

[0087] B3: applying a third counter-pulling voltage corresponding to the third counter-pulling voltage to the needle valve by applying a third counter-pulling voltage indicated by a third counter-pulling voltage parameter.

[0088] By obtaining the falling speed of the needle valve after the first counter-pulling voltage is applied and adjusting the second counter-pulling voltage parameter according to the falling speed, different working conditions and changes can be dynamically adapted, and the flexibility of applying the counter-pulling voltage is improved.

[0089] The counter-pulling voltage parameter can include a counter-pulling voltage value, a waiting time length, and a maintaining time length. The present application provides a determination and application method for the counter-pulling voltage value, see C1-C3:

[0090] C1: obtaining a first corresponding relationship between a pressure difference value and a counter-pulling voltage value, and the pressure difference value.

[0091] The pressure difference value is used to represent the difference between the fuel pressure and the intake pressure. The fuel pressure is the force acting on the needle valve in the same direction as the falling direction, and the intake pressure is the force acting on the needle valve in the opposite direction of the falling direction. The first corresponding relationship is a pre-established corresponding relationship, which describes that different pressure difference values correspond to different counter-pulling voltage values.

[0092] The pressure difference value has multiple forms, including a difference value, a ratio value, etc. For example, the pressure difference value can be equal to the fuel pressure minus the intake pressure.

[0093] C2: determining the counter-pulling voltage value based on the first corresponding relationship according to the pressure difference value. In the first corresponding relationship, the greater the pressure difference value, the greater the counter-pulling voltage value.

[0094] The greater the counter-pulling voltage value, the greater the force corresponding to the counter-pulling voltage, and the greater the force, the better the deceleration effect.

[0095] C3: applying a counter-pulling voltage to the needle valve by applying a counter-pulling voltage according to the counter-pulling voltage value.

[0096] The greater the pressure difference value, the greater the acceleration of the needle valve, and the greater the potential falling speed of the needle valve. Based on the first corresponding relationship, the counter-pulling voltage value can be increased to increase the force acting on the needle valve and improve the deceleration effect of the needle valve, thereby reducing the impact and wear on the valve seat.

[0097] By obtaining the pressure difference value in real time and adjusting the counter-pulling voltage according to the pressure difference value, the deceleration effect of the needle valve can be dynamically adjusted according to environmental factors that affect the speed of the needle valve, thereby increasing the flexibility and adaptability of the needle valve deceleration.

[0098] The waiting time length is the time interval between the end of the conventional voltage application and the start of the counter-pulling voltage application, and the maintaining time length is the time length of the continuous application of the counter-pulling voltage. The present application provides a determination and application method for the waiting time length and the maintaining time length, see D1-D5:

[0099] D1: obtaining a second correspondence relationship between the pressure difference value and the waiting time length, a third correspondence relationship between the pressure difference value and the maintaining time length, and the pressure difference value.

[0100] The second correspondence relationship is a pre-established correspondence relationship, which describes that different pressure difference values correspond to different waiting time lengths, and the third correspondence relationship is a pre-established correspondence relationship, which describes that different pressure difference values correspond to different maintaining time lengths.

[0101] D2: determining the waiting time length according to the pressure difference value based on the second correspondence relationship, wherein the greater the pressure difference value, the shorter the waiting time length in the second correspondence relationship.

[0102] The greater the pressure difference value indicates that the acceleration of the needle valve is greater, the potential falling speed of the needle valve is greater, and the time left for the response of the pull-back voltage is shorter. If the waiting time length is too long, it may cause the needle valve to fall into the valve seat again to apply the pull-back voltage, thereby not achieving the effect of decelerating the needle valve. In the second correspondence relationship, the greater the pressure difference value, the shorter the waiting time length, so that the pull-back voltage can be applied in time.

[0103] D3: determining the maintaining time length according to the pressure difference value based on the third correspondence relationship, wherein the greater the pressure difference value, the longer the maintaining time length in the third correspondence relationship.

[0104] The greater the pressure difference value indicates that the acceleration of the needle valve is greater, and the potential falling speed of the needle valve is greater. If the maintaining time length is too short, it may cause the deceleration effect to be not good enough, and the falling speed into the valve seat still has a large impact. In the third correspondence relationship, the greater the pressure difference value, the longer the maintaining time length, so that the time of applying the pull-back voltage can be extended to provide a better deceleration effect.

[0105] D4: waiting for the waiting time length after the end of the pull-back voltage indicated by the pull-back voltage parameter according to the waiting time length.

[0106] D5: in response to the end of the waiting process, applying the pull-back voltage according to the maintaining time length by maintaining the maintaining time length according to the pull-back voltage value, and applying the pull-back voltage corresponding to the force on the needle valve.

[0107] By adjusting the waiting time length and the maintaining time length according to the pressure difference value, the second correspondence relationship and the third correspondence relationship, the effectiveness of applying the pull-back voltage is ensured, the deceleration effect on the needle valve is improved, the impact on the valve seat is further reduced, and the wear of the valve seat is reduced.

[0108] The application also provides an implementation manner for updating the maintaining time length according to the waiting time length, see E1-E4:

[0109] E1: if the waiting duration is greater than or equal to the first preset duration, increase the maintenance duration to obtain an updated maintenance duration.

[0110] The first preset duration is used to represent that the waiting duration is too long.

[0111] If the waiting duration is greater than or equal to the first preset duration, it means that the waiting duration is too long, and the needle valve falls too fast. At this time, the maintenance duration needs to be increased to obtain an updated maintenance duration, so as to prolong the time of maintaining the reverse pulling voltage and prolong the deceleration duration of the needle valve, thereby improving the deceleration effect of the needle valve.

[0112] E2: if the waiting duration is less than or equal to the second preset duration, decrease the maintenance duration to obtain an updated maintenance duration.

[0113] The second preset duration is used to represent that the waiting duration is too short, and the second preset duration is less than the first preset duration.

[0114] If the waiting duration is less than or equal to the first preset duration, it means that the waiting duration is too short, and the needle valve just starts to fall, and the falling speed is small. At this time, the maintenance duration needs to be reduced to obtain an updated maintenance duration, so as to prevent the needle valve from being pulled up without achieving the effect of deceleration.

[0115] E3: if the waiting duration is greater than the second preset duration and less than the first preset duration, the maintenance duration is determined as the updated maintenance duration.

[0116] If the waiting duration is greater than the second preset duration and less than the first preset duration, it means that the waiting duration is moderate, and no adjustment is needed. Therefore, the maintenance duration is determined as the updated maintenance duration.

[0117] E4: in response to the end of the waiting process, according to the updated maintenance duration, the updated maintenance duration is maintained, and the reverse pulling voltage is applied according to the reverse pulling voltage value, so as to apply the force corresponding to the reverse pulling voltage to the needle valve.

[0118] By updating the maintenance duration according to the waiting duration, it is ensured that the needle valve can fall into the valve seat at a more appropriate speed under different waiting durations. This way of dynamically updating the maintenance duration is more flexible and adaptive, and the deceleration effect is better.

[0119] Referring to Figure 5 , Figure 5 A device structure diagram of a methanol injector control device provided by the present application is provided, and the device comprises an acquisition unit 501, a pulling unit 502 and a reverse pulling unit 503.

[0120] The acquisition unit is used to acquire a normal voltage parameter and a reverse pulling voltage parameter.

[0121] The lifting unit is configured to lift the needle valve of the methanol injector by applying a normal voltage indicated by the normal voltage parameter according to the normal voltage parameter, the needle valve being a component for controlling fuel injection.

[0122] The anti-lifting unit is configured to apply an action force corresponding to an anti-lifting voltage to the needle valve by applying the anti-lifting voltage indicated by the anti-lifting voltage parameter according to the anti-lifting voltage parameter during the falling of the needle valve, the action force being opposite to the falling direction of the needle valve.

[0123] Therefore, the methanol injector control device provided by the application can reduce the impact on the valve seat and the wear of the valve seat by applying an action force during the falling of the needle valve, and the application will be specifically described below.

[0124] The acquisition unit acquires the normal voltage parameter and the anti-lifting voltage parameter, which can ensure that the control process of the methanol injector is accurately performed according to the voltage parameters. The lifting unit lifts the needle valve of the methanol injector by applying a normal voltage indicated by the normal voltage parameter according to the normal voltage parameter, which ensures the fuel supply requirement of the methanol engine by lifting the needle valve to inject methanol. During the falling of the needle valve, the anti-lifting unit applies an action force to the needle valve by applying an anti-lifting voltage indicated by the anti-lifting voltage parameter according to the anti-lifting voltage parameter, so that the needle valve receives an action force opposite to the falling direction during the falling, which reduces the speed of the needle valve when falling to the valve seat, reduces the impact on the valve seat, reduces the wear of the valve seat caused by high-speed impact, prolongs the service life of the methanol injector, and improves the reliability of the methanol injector.

[0125] As a possible implementation manner, the anti-lifting voltage parameter includes a first anti-lifting voltage parameter and a second anti-lifting voltage parameter, and the anti-lifting unit is specifically configured to:

[0126] apply an action force corresponding to a first anti-lifting voltage to the needle valve by applying the first anti-lifting voltage indicated by the first anti-lifting voltage parameter according to the first anti-lifting voltage parameter;

[0127] after the end of applying the first anti-lifting voltage indicated by the first anti-lifting voltage parameter, apply an action force corresponding to a second anti-lifting voltage to the needle valve by applying the second anti-lifting voltage indicated by the second anti-lifting voltage parameter.

[0128] As a possible implementation manner, the anti-lifting unit is specifically configured to:

[0129] after the end of applying the first anti-lifting voltage indicated by the first anti-lifting voltage parameter, acquire the falling speed of the needle valve;

[0130] adjust the second pull-back voltage parameter according to the falling speed to obtain a third pull-back voltage parameter;

[0131] apply the third pull-back voltage corresponding to the third pull-back voltage to the needle valve by applying a third pull-back voltage indicated by the third pull-back voltage parameter.

[0132] As a possible implementation manner, the pull-back voltage parameter comprises a pull-back voltage value, and the pull-back voltage value is obtained by:

[0133] obtain a first corresponding relationship between a pressure difference value and the pull-back voltage value, and the pressure difference value is used to represent a difference between the fuel pressure and the intake pressure, the fuel pressure is a force in the falling direction received by the needle valve, and the intake pressure is a force in the opposite direction received by the needle valve;

[0134] determine the pull-back voltage value according to the pressure difference value and based on the first corresponding relationship, in which the pressure difference value is greater, the pull-back voltage value is greater;

[0135] the applying the force corresponding to the pull-back voltage to the needle valve by applying the pull-back voltage indicated by the pull-back voltage parameter according to the pull-back voltage parameter comprises:

[0136] applying the force corresponding to the pull-back voltage to the needle valve according to the pull-back voltage value by applying the pull-back voltage according to the pull-back voltage value according to the pull-back voltage value.

[0137] As a possible implementation manner, the pull-back voltage parameter comprises the pull-back voltage value, a waiting time length and a maintaining time length, and the waiting time length and the maintaining time length are obtained by:

[0138] obtain a second corresponding relationship between the pressure difference value and the waiting time length, a third corresponding relationship between the pressure difference value and the maintaining time length, and the pressure difference value;

[0139] determine the waiting time length according to the pressure difference value and based on the second corresponding relationship, in which the pressure difference value is greater, the waiting time length is shorter;

[0140] determine the maintaining time length according to the pressure difference value and based on the third corresponding relationship, in which the pressure difference value is greater, the maintaining time length is shorter;

[0141] the applying the force corresponding to the pull-back voltage to the needle valve by applying the pull-back voltage indicated by the pull-back voltage parameter according to the pull-back voltage parameter comprises:

[0142] according to the waiting duration, waiting for the waiting duration after the end of the application of the pull-back voltage indicated by the pull-back voltage parameter;

[0143] in response to the end of the waiting process, according to the maintenance duration, applying the pull-back voltage to the needle valve by maintaining the maintenance duration and at the pull-back voltage value.

[0144] As a possible implementation manner, the apparatus further includes an updating unit, configured to:

[0145] if the waiting duration is greater than or equal to a first preset duration, increasing the maintenance duration to obtain an updated maintenance duration, the first preset duration being used to represent that the waiting duration is too long;

[0146] if the waiting duration is less than or equal to a second preset duration, decreasing the initial maintenance duration to obtain the updated maintenance duration, the second preset duration being used to represent that the waiting duration is too short, and the second preset duration being less than the first preset duration;

[0147] if the waiting duration is greater than the second preset duration and less than the first preset duration, determining the maintenance duration as the updated maintenance duration;

[0148] the response to the end of the waiting process, according to the maintenance duration, applying the pull-back voltage to the needle valve by maintaining the maintenance duration and at the pull-back voltage value, includes:

[0149] in response to the end of the waiting process, according to the updated maintenance duration, applying the pull-back voltage to the needle valve by maintaining the updated maintenance duration and at the pull-back voltage value.

[0150] Referring to Figure 6 The present application also provides a computer device, including a memory 601 and a processor 602:

[0151] the memory is configured to store a computer program and transmit the computer program to the processor;

[0152] the processor is configured to execute the method of the above-mentioned method embodiments according to the computer program.

[0153] The present application also provides a computer readable storage medium, characterized in that the computer readable storage medium is used to store a computer program, and the computer program is used to execute the method of the above-mentioned method embodiments.

[0154] The application also provides a computer program product comprising a computer program which, when executed on a computer device, causes the computer device to perform the method in the above method embodiments.

[0155] It should be noted that the various embodiments described in the specification are presented in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between embodiments can be mutually referred to. For the system or device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant part can be referred to the method part.

[0156] It should be understood that in the present application, “at least one” means one or more, and “multiple” means two or more. “And / or” is used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, “A and / or B” can mean: only A, only B, and A and B exist at the same time, where A and B can be singular or plural. The character “ / ” generally represents an “or” relationship between the front and rear associated objects. “At least one of the following” or similar expressions means any combination of these items, including single item or any combination of multiple items. For example, at least one of a, b or c, can mean: a, b, c, “a and b”, “a and c”, “b and c”, or “a and b and c”, where a, b, and c can be single or multiple.

[0157] It should also be noted that in this paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms “include”, “contain” or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement “including a…” does not exclude the presence of another identical element in the process, method, article or device including the element.

[0158] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein can be implemented directly with hardware, a software module executed by a processor, or a combination of the two. The software module can be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0159] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and, while certain embodiments according to the principles set forth herein are shown and described, it is to be understood that the same are not limiting of the scope of the application as it is set forth in the appended claims, and that various modifications are made within the scope of the appended claims. Therefore, it is contemplated to cover the application in its broadest scope, including all features that can be made or used in the embodiments described herein.

Claims

1. A control method of a methanol injector, characterized by, The method comprises: obtaining a normal voltage parameter and a counter-pulling voltage parameter; according to the normal voltage parameter, pulling up a needle valve of a methanol injector by applying a normal voltage indicated by the normal voltage parameter, the needle valve being a component for controlling fuel injection; in the process of falling of the needle valve, according to the counter-pulling voltage parameter, applying an action force corresponding to the counter-pulling voltage to the needle valve by applying a counter-pulling voltage indicated by the counter-pulling voltage parameter, the direction of the action force being opposite to the falling direction of the needle valve; the counter-pulling voltage parameter comprises a counter-pulling voltage value, and the counter-pulling voltage value is obtained by the following way: obtaining a first corresponding relationship between a pressure difference value and the counter-pulling voltage value, and the pressure difference value, the pressure difference value being used for representing the difference between a fuel pressure and an intake pressure, the fuel pressure being an action force in the same direction as the falling direction of the needle valve, and the intake pressure being an action force in the opposite direction to the falling direction of the needle valve; determining the counter-pulling voltage value based on the first corresponding relationship according to the pressure difference value, in the first corresponding relationship, the greater the pressure difference value is, the greater the counter-pulling voltage value is; the step of applying the action force corresponding to the counter-pulling voltage to the needle valve according to the counter-pulling voltage parameter by applying the counter-pulling voltage indicated by the counter-pulling voltage parameter comprises: applying the action force corresponding to the counter-pulling voltage to the needle valve by applying the counter-pulling voltage according to the counter-pulling voltage value; the counter-pulling voltage parameter comprises a counter-pulling voltage value, a waiting time length and a maintaining time length, the waiting time length being a time interval from the end of applying the normal voltage to the start of applying the counter-pulling voltage, and the maintaining time length being a time length during which the counter-pulling voltage is continuously applied, and the waiting time length and the maintaining time length are obtained by the following way: obtaining a second corresponding relationship between a pressure difference value and the waiting time length, a third corresponding relationship between the pressure difference value and the maintaining time length, and the pressure difference value; determining the waiting time length based on the second corresponding relationship according to the pressure difference value, in the second corresponding relationship, the greater the pressure difference value is, the shorter the waiting time length is; determining the maintaining time length based on the third corresponding relationship according to the pressure difference value, in the third corresponding relationship, the greater the pressure difference value is, the longer the maintaining time length is.

2. The method of claim 1, wherein, the counter-pulling voltage parameter comprises a first counter-pulling voltage parameter and a second counter-pulling voltage parameter, and the step of applying the action force corresponding to the counter-pulling voltage to the needle valve according to the counter-pulling voltage parameter by applying the counter-pulling voltage indicated by the counter-pulling voltage parameter comprises: applying the action force corresponding to the first counter-pulling voltage to the needle valve by applying a first counter-pulling voltage indicated by the first counter-pulling voltage parameter according to the first counter-pulling voltage parameter; after the end of applying the first counter-pulling voltage indicated by the first counter-pulling voltage parameter, applying the action force corresponding to the second counter-pulling voltage to the needle valve by applying a second counter-pulling voltage indicated by the second counter-pulling voltage parameter according to the second counter-pulling voltage parameter.

3. The method of claim 2, wherein, The applying, after the first pull voltage indicated by the first pull voltage parameter is applied, a second pull voltage corresponding to an acting force to the needle valve by applying a second pull voltage indicated by a second pull voltage parameter, comprises: After the first pull voltage indicated by the first pull voltage parameter is applied, a falling speed of the needle valve is obtained; According to the falling speed, the second pull voltage parameter is adjusted to obtain a third pull voltage parameter; The third pull voltage corresponding to an acting force to the needle valve is applied by applying a third pull voltage indicated by the third pull voltage parameter.

4. The method of claim 1, wherein, The method further comprises: If the waiting time length is greater than or equal to a first preset time length, the maintaining time length is increased to obtain an updated maintaining time length, the first preset time length is used to represent that the waiting time length is too long; If the waiting time length is less than or equal to a second preset time length, the maintaining time length is reduced to obtain the updated maintaining time length, the second preset time length is used to represent that the waiting time length is too short, and the second preset time length is less than the first preset time length; If the waiting time length is greater than the second preset time length and less than the first preset time length, the maintaining time length is determined as the updated maintaining time length; In response to the end of the waiting process, the acting force to the needle valve is applied according to the updated maintaining time length by maintaining the updated maintaining time length and applying the pull voltage according to the pull voltage value.

5. A methanol injector control device characterized by comprising: The device comprises an obtaining unit, a pull unit and a pullback unit. The obtaining unit is configured to obtain a regular voltage parameter and a pullback voltage parameter. The pull unit is configured to pull up a needle valve of a methanol injector according to the regular voltage parameter by applying a regular voltage indicated by the regular voltage parameter, the needle valve being a component for controlling fuel injection. The pullback unit is configured to apply an acting force to the needle valve in a process of falling of the needle valve according to the pullback voltage parameter by applying a pullback voltage indicated by the pullback voltage parameter, a direction of the acting force being opposite to a falling direction of the needle valve. The pullback voltage parameter comprises a pullback voltage value, the pullback voltage value being obtained by the following way: A first corresponding relationship between a pressure difference value and the pullback voltage value is obtained, the pressure difference value being used to represent a difference between a fuel pressure and an intake pressure, the fuel pressure being an acting force on the needle valve in the same direction as the falling direction, and the intake pressure being an acting force on the needle valve in the opposite direction as the falling direction; The pullback voltage value is determined based on the first corresponding relationship according to the pressure difference value, in the first corresponding relationship, the greater the pressure difference value is, the greater the pullback voltage value is. The applying, according to the pullback voltage parameter, an acting force to the needle valve by applying a pullback voltage indicated by the pullback voltage parameter, comprises: The acting force to the needle valve is applied by applying the pullback voltage according to the pullback voltage value. The pull-down voltage parameter comprises a pull-down voltage value, a waiting time length and a maintaining time length, the waiting time length is a time interval from the end of the application of the normal voltage to the start of the application of the pull-down voltage, the maintaining time length is a time length during which the pull-down voltage is continuously applied, and the waiting time length and the maintaining time length are obtained in the following manner: obtaining a second correspondence relationship between a pressure difference value and the waiting time length, a third correspondence relationship between the pressure difference value and the maintaining time length, and the pressure difference value; determining the waiting time length according to the pressure difference value and based on the second correspondence relationship, in which the greater the pressure difference value is, the shorter the waiting time length is in the second correspondence relationship; determining the maintaining time length according to the pressure difference value and based on the third correspondence relationship, in which the greater the pressure difference value is, the longer the maintaining time length is in the third correspondence relationship.

6. A computer device, comprising: The computer device comprises a processor and a memory: the memory is configured to store a computer program and transmit the computer program to the processor; the processor is configured to execute the method according to any one of claims 1-4 according to the computer program.

7. A computer-readable storage medium, characterized in that, The computer readable storage medium is configured to store a computer program, and the computer program is configured to execute the method according to any one of claims 1-4.

8. A computer program product comprising a computer program, characterised in that, When it runs on the computer device, it enables the computer device to execute the method according to any one of claims 1-4.

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