Electromagnetic valve control circuit and vehicle

Abstract

The invention discloses an electromagnetic valve control circuit and a vehicle, and belongs to the technical field of circuits. The circuit comprises a control module, the output end of the control module is connected with the input end of a voltage conversion module, and the control module is used for outputting a control signal to the voltage conversion module based on driving current needed by an electromagnetic valve load; the output end of the voltage conversion module is connected with the first end of the electromagnetic valve load, and the voltage conversion module is used for outputting first linear voltage to the electromagnetic valve load based on the control signal so as to control the current flowing through the electromagnetic valve load based on the first linear voltage. Therefore, the EMC problem is avoided.

Description

Technical Field

[0001] The present application belongs to the field of circuit technology, and in particular, relates to a solenoid valve control circuit and a vehicle. Background Art

[0002] In order to have a more comfortable riding experience, the vehicle is equipped with a more intelligent air suspension system, which can control the air suspension system by controlling the current flowing through the solenoid valve in the air suspension system.

[0003] In the prior art, a pre-driver chip is usually used to control an N-type metal oxide semiconductor field effect transistor (N-MOSFET, NMOS) to output a pulse width modulation (Pulse Width Modulation, PWM) control current to the solenoid valve load. However, this method requires PWM high-frequency drive and high energy, so there will be electromagnetic compatibility (Electromagnetic Compatibility, EMC) problems. Summary of the invention

[0004] The embodiments of the present application provide a solenoid valve control circuit and a vehicle, which can at least solve the EMC problem that exists in the prior art when a pre-driver chip is used to control NMOS to output a PWM control current to a solenoid valve load.

[0005] In a first aspect, an embodiment of the present application provides a solenoid valve control circuit, the circuit comprising:

[0006] A control module, wherein an output terminal of the control module is connected to an input terminal of the voltage conversion module, and is used to output a control signal to the voltage conversion module based on a driving current required by a solenoid valve load;

[0007] A voltage conversion module, wherein an output end of the voltage conversion module is connected to a first end of the solenoid valve load, and is used to output a first linear voltage to the solenoid valve load based on a control signal, so as to control a current flowing through the solenoid valve load based on the first linear voltage.

[0008] The solenoid valve control circuit of the embodiment of the present application includes a control module and a voltage conversion module. The output end of the control module is connected to the input end of the voltage conversion module, and the output end of the voltage conversion module is connected to the first end of the solenoid valve load. The control module outputs a control signal to the voltage conversion module based on the driving current required by the solenoid valve load, and the voltage conversion module outputs a first linear voltage to the solenoid valve load based on the control signal to control the current flowing through the solenoid valve load based on the first linear voltage. In this way, the current flowing through the solenoid valve load can be controlled by the linear voltage output by the voltage conversion module without outputting a high-frequency and high-energy PWM control current to the solenoid valve load. Therefore, the current flowing through the solenoid valve load is not a PWM current, avoiding EMC problems.

[0009] In some embodiments, the control signal is a periodic pulse signal, and the circuit further includes:

[0010] The filter module has an input end connected to the output end of the control module, and an output end of the filter module connected to the input end of the voltage conversion module, and is used to filter the control signal to obtain a DC signal, and output the DC signal to the voltage conversion module.

[0011] In the embodiment of the present application, when the control signal is a periodic pulse signal, the control signal can be filtered into a stable DC signal through the filtering module, thereby providing a stable DC signal for the voltage conversion module.

[0012] In some embodiments, the filter module is a capacitor-resistance filter module.

[0013] The capacitor and resistor filtering module used in the embodiment of the present application can reduce the complexity of the circuit and simplify the circuit.

[0014] In some embodiments, the capacitor-resistor filter module includes at least one group of capacitor-resistor sub-filter modules, and the capacitor-resistor sub-filter module includes:

[0015] A resistor, wherein a first end of the resistor is connected to an output end of the control module, and a second end of the resistor is connected to an input end of the voltage conversion module;

[0016] A capacitor, a first end of the capacitor is connected to the second end of the resistor, and a second end of the capacitor is grounded.

[0017] In the embodiment of the present application, one or more groups of capacitor-resistor sub-filter modules can be set up for filtering processing according to requirements, so as to achieve a filtering effect that better meets the requirements, and the capacitor-resistor sub-filter module includes capacitors and resistors, which reduces the complexity of the circuit.

[0018] In some embodiments, the circuit further comprises:

[0019] A first operational amplifier, wherein the positive input terminal of the first operational amplifier is connected to the output terminal of the control module, the reverse input terminal of the first operational amplifier is connected to the output terminal of the first operational amplifier, and the output terminal of the first operational amplifier is connected to the input terminal of the voltage conversion module, is used to amplify the control signal and output the amplified control signal to the voltage conversion module.

[0020] The embodiment of the present application can amplify the control signal through the first operational amplifier, thereby improving the driving capability of the solenoid valve load.

[0021] In some embodiments, the circuit further comprises:

[0022] A sampling module, wherein the input end of the sampling module is connected to the output end of the voltage conversion module, and the output end of the sampling module is connected to the input end of the control module, and is used to collect the current flowing through the solenoid valve load and feed back the current flowing through the solenoid valve load to the control module;

[0023] The control module is also used to calculate the difference between the current flowing through the solenoid valve load and the driving current to obtain a target current difference, determine a target adjustment signal corresponding to the target current difference according to a preset corresponding relationship between the current difference and the adjustment signal, and output the target adjustment signal to the voltage conversion module;

[0024] The voltage conversion module is further configured to output a second linear voltage to the solenoid valve load based on the target adjustment signal, so as to control a current flowing through the solenoid valve load based on the second linear voltage.

[0025] In the embodiment of the present application, a sampling module is used to collect the current of the solenoid valve load and feed it back to the control module, so that the control module adjusts the current flowing through the solenoid valve load 300 based on the current fed back by the sampling module, thereby forming a closed-loop control, which can improve the control accuracy of the solenoid valve load.

[0026] In some embodiments, the sampling module includes:

[0027] A voltage dividing component, wherein a first end of the voltage dividing component is connected to an output end of the voltage conversion module, and a second end of the voltage dividing component is connected to a first end of the solenoid valve load;

[0028] A second operational amplifier, wherein the positive input terminal of the second operational amplifier is connected to the first end of the voltage divider component, the reverse input terminal of the second operational amplifier is connected to the second end of the voltage divider component, and the output terminal of the second operational amplifier is connected to the input terminal of the control module, and is used to collect the current flowing through the voltage divider component, obtain the current flowing through the solenoid valve load, and feed back the current flowing through the solenoid valve load to the control module.

[0029] In the embodiment of the present application, the current flowing through the solenoid valve load can be determined more accurately by connecting a voltage divider component in series with the solenoid valve load and collecting the current flowing through the voltage divider component through a second operational amplifier as the current flowing through the solenoid valve load.

[0030] In some embodiments, the control module is a microcontroller unit (MCU).

[0031] The embodiment of the present application adopts MCU as the control module, which can reduce the power consumption of the control module and increase flexibility.

[0032] In some embodiments, the voltage conversion module is a direct current to direct current converter (DCDC).

[0033] The embodiment of the present application uses a relatively low-cost DCDC output voltage to control the current flowing through the solenoid valve load, without using a relatively high-cost pre-driver chip and NMOS, thereby reducing costs.

[0034] In a second aspect, an embodiment of the present application further provides a vehicle, which includes a solenoid valve control circuit as in the first aspect.

[0035] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] Figure 1 This is one of the structural schematic diagrams of a solenoid valve control circuit provided by an embodiment of the present application;

[0038] Figure 2 This is the second structural schematic diagram of a solenoid valve control circuit provided by an embodiment of the present application;

[0039] Figure 3 This is the third structural schematic diagram of a solenoid valve control circuit provided by an embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0042] It should be noted that, in this article, relational 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 these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0043] The following is a detailed introduction to a solenoid valve control circuit provided in an embodiment of the present application.

[0044] Figure 1 A schematic structural diagram of a solenoid valve control circuit provided in one embodiment of the present application is shown.

[0045] like Figure 1 As shown, the solenoid valve control circuit may include: a control module 100 and a voltage conversion module 200 .

[0046] Among them, the output end of the control module 100 can be connected to the input end of the voltage conversion module 200, and can be used to output a control signal to the voltage conversion module 200 based on the driving current required by the solenoid valve load 300; the output end of the voltage conversion module 200 can be connected to the first end of the solenoid valve load 300, and can be used to output a first linear voltage to the solenoid valve load 300 based on the control signal, so as to control the current flowing through the solenoid valve load 300 based on the first linear voltage.

[0047] Here, the driving current required by the solenoid valve load 300 may be pre-stored in the control module 100 .

[0048] Specifically, the control module 100 can generate a control signal based on the driving current required by the solenoid valve load 300, and output the control signal to the voltage conversion module 200. After receiving the control signal, the voltage conversion module 200 can output a first linear voltage to the solenoid valve load 300 based on the control signal to control the current flowing through the solenoid valve load 300 based on the first linear voltage.

[0049] The solenoid valve control circuit and vehicle of the embodiment of the present application include a control module and a voltage conversion module. The output end of the control module is connected to the input end of the voltage conversion module, and the output end of the voltage conversion module is connected to the first end of the solenoid valve load. The control module outputs a control signal to the voltage conversion module based on the driving current required by the solenoid valve load, and the voltage conversion module outputs a first linear voltage to the solenoid valve load based on the control signal to control the current flowing through the solenoid valve load based on the first linear voltage. In this way, the current flowing through the solenoid valve load can be controlled by the linear voltage output by the voltage conversion module without outputting a high-frequency and high-energy PWM control current to the solenoid valve load. Therefore, the current flowing through the solenoid valve load is not a PWM current, avoiding EMC problems.

[0050] Figure 2 A schematic diagram of the structure of a solenoid valve control circuit provided by an embodiment of the present application is shown below. Figure 2 The solenoid valve control circuit provided in the embodiment of the present application is introduced.

[0051] In some implementations, the control signal may be a periodic pulse signal. In order to enable the voltage conversion module to receive a stable signal, the circuit may further include a filtering module 400 .

[0052] The input end of the filter module 400 can be connected to the output end of the control module 100, and the output end of the filter module 400 can be connected to the input end of the voltage conversion module 200, which can be used to filter the control signal to obtain a DC signal and output the DC signal to the voltage conversion module 200.

[0053] Here, the filtering module 400 can filter the periodic pulse signal to obtain a stable DC signal.

[0054] Exemplarily, the control signal may be a PWM signal.

[0055] Specifically, the filter module 400 may filter the PWM signal output by the control module 100 to obtain a stable DC signal, and then output the DC signal to the voltage conversion module 200 .

[0056] In this way, when the control signal is a periodic pulse signal, the control signal can be filtered into a stable DC signal through the filtering module, thereby providing a stable DC signal for the voltage conversion module.

[0057] In some implementations, in order to improve the driving capability of the solenoid valve load, the circuit may further include a first operational amplifier 500 .

[0058] Among them, the positive input terminal of the first operational amplifier 500 can be connected to the output terminal of the control module 100, the reverse input terminal of the first operational amplifier 500 can be connected to the output terminal of the first operational amplifier 500, and the output terminal of the first operational amplifier 500 can be connected to the input terminal of the voltage conversion module 200, which can be used to amplify the control signal and output the amplified control signal to the voltage conversion module 200.

[0059] Specifically, the first operational amplifier 500 may amplify the control signal output by the control module 100 , and then output the amplified control signal to the voltage conversion module 200 .

[0060] In some embodiments, the positive input terminal of the first operational amplifier 500 can be connected to the output terminal of the filtering module 400, the reverse input terminal of the first operational amplifier 500 can be connected to the output terminal of the first operational amplifier 500, and the output terminal of the first operational amplifier 500 can be connected to the input terminal of the voltage conversion module 200, which can be used to amplify the DC signal and output the amplified DC signal to the voltage conversion module 200.

[0061] Specifically, the first operational amplifier 500 can amplify the DC signal output by the filtering module 400 , and then output the amplified DC signal to the voltage conversion module 200 .

[0062] In this way, the control signal can be amplified by the first operational amplifier, thereby improving the driving capability of the solenoid valve load.

[0063] In some implementations, in order to improve the control accuracy of the solenoid valve load, the circuit may further include a sampling module 600 .

[0064] The input end of the sampling module 600 can be connected to the output end of the voltage conversion module 200, and the output end of the sampling module 600 can be connected to the input end of the control module 100, and can be used to collect the current flowing through the solenoid valve load 300 and feed back the current flowing through the solenoid valve load 300 to the control module 100;

[0065] The control module 100 can also be used to calculate the difference between the current flowing through the solenoid valve load 300 and the driving current to obtain a target current difference, determine a target adjustment signal corresponding to the target current difference according to a preset correspondence between the current difference and the adjustment signal, and output the target adjustment signal to the voltage conversion module 200;

[0066] The voltage conversion module 200 may also be configured to output a second linear voltage to the solenoid valve load 300 based on the target adjustment signal, so as to control the current flowing through the solenoid valve load 300 based on the second linear voltage.

[0067] "The voltage conversion module 200 can also be used to output a second linear voltage to the solenoid valve load 300 based on the target adjustment signal, so as to control the current flowing through the solenoid valve load 300 based on the second linear voltage" can be a sub-step of "the voltage conversion module is used to output a first linear voltage to the solenoid valve load based on the control signal, so as to control the current flowing through the solenoid valve load based on the first linear voltage", and can also be executed after controlling the current flowing through the solenoid valve load based on the first linear voltage.

[0068] Specifically, the sampling module 600 can collect the current flowing through the solenoid valve load 300, and then feed back the current flowing through the solenoid valve load 300 to the control module 100. Then, the control module 100 can calculate the difference between the current flowing through the solenoid valve load 300 and the driving current required by the solenoid valve load 300 to obtain the target current difference. According to the correspondence between the preset current difference and the adjustment signal, the target adjustment signal corresponding to the target current difference is determined, and the target adjustment signal is output to the voltage conversion module 200. Then, the voltage conversion module 200 can output a second linear voltage to the solenoid valve load 300 based on the target adjustment signal to control the current flowing through the solenoid valve load 300 based on the second linear voltage.

[0069] In addition, in some embodiments, the filter module 400 can filter the target adjustment signal, and the first operational amplifier 500 can amplify the target adjustment signal. The specific processing process of the target adjustment signal by the filter module 400 and the first operational amplifier 500 is the same as the specific processing process of the control signal by the filter module 400 and the first operational amplifier 500, which will not be repeated here.

[0070] For example, if the current driving current required by the solenoid valve load 300 is I. The control module 100 may first output a control signal to the filter module 400, and the filter module 400 obtains a stable DC signal after filtering the control signal, and then outputs the stable DC signal to the voltage conversion module 200. The voltage conversion module 200 may output a first linear voltage V to the solenoid valve load 300 based on the stable DC signal, so that the current I1 flowing through the solenoid valve load 300 is equal to V / R, where R is the internal resistance of the solenoid valve load 300. The sampling module 600 may collect the I1, and then feed back the I1 to the control module 100. The control module 100 may compare I1 with I. If I1 is not equal to I, the control module 100 may output a target adjustment signal to control the voltage conversion module 200 to adjust the output voltage to a second linear voltage, so as to adjust the current flowing through the solenoid valve load 300 based on the second linear voltage.

[0071] In this way, the current of the solenoid valve load is collected based on the sampling module and fed back to the control module, so that the control module adjusts the current flowing through the solenoid valve load 300 based on the current fed back by the sampling module, thus forming a closed-loop control, which can improve the control accuracy of the solenoid valve load.

[0072] Figure 3 A schematic diagram of the structure of a solenoid valve control circuit provided by an embodiment of the present application is shown below. Figure 3 The solenoid valve control circuit provided in the embodiment of the present application is introduced.

[0073] In some implementations, the filter module 400 may be a capacitor-resistance filter module.

[0074] Here, the use of capacitor and resistor filtering modules can reduce the complexity of the circuit and simplify the circuit.

[0075] In some embodiments, in order to achieve a filtering effect that better meets the requirements, the capacitor-resistor filtering module may include at least one group of capacitor-resistor sub-filtering modules 410 , and the capacitor-resistor sub-filtering module 410 may include a resistor 411 and a capacitor 412 .

[0076] Among them, the first end of the resistor 411 can be connected to the output end of the control module 100, and the second end of the resistor 411 can be connected to the input end of the voltage conversion module 200; the first end of the capacitor 412 can be connected to the second end of the resistor 411, and the second end of the capacitor 412 can be grounded.

[0077] Here, one or more groups of capacitor and resistor sub-filter modules 410 can be set according to requirements to perform filtering processing.

[0078] For example, Figure 3 The capacitor-resistance filtering module may include three groups of capacitor-resistance sub-filtering modules 410 .

[0079] In this way, one or more groups of capacitor-resistor sub-filter modules can be set up according to requirements for filtering processing, so as to achieve a filtering effect that better meets the requirements, and the capacitor-resistor sub-filter module includes capacitors and resistors, reducing the complexity of the circuit.

[0080] In some implementations, in order to more accurately collect the current flowing through the solenoid valve load, the sampling module 600 may include a voltage divider component 610 and a second operational amplifier 620 .

[0081] Among them, the first end of the voltage divider component 610 can be connected to the output end of the voltage conversion module 200, and the second end of the voltage divider component 610 can be connected to the first end of the solenoid valve load 300; the positive input end of the second operational amplifier 620 can be connected to the first end of the voltage divider component 610, the reverse input end of the second operational amplifier 620 can be connected to the second end of the voltage divider component 610, and the output end of the second operational amplifier 620 can be connected to the input end of the control module 100, which can be used to collect the current flowing through the voltage divider component 610, obtain the current flowing through the solenoid valve load 300, and feedback the current flowing through the solenoid valve load 300 to the control module 100.

[0082] Here, the voltage dividing component 610 may be a resistor.

[0083] Specifically, the second operational amplifier 620 can collect the current flowing through the voltage divider component 610. Since the voltage divider component 610 is connected in series with the solenoid valve load 300, the current flowing through the voltage divider component 610 is equal to the current flowing through the solenoid valve load 300. The current flowing through the voltage divider component 610 can be used as the current flowing through the solenoid valve load 300. Then, the second operational amplifier 620 can feed back the current flowing through the solenoid valve load 300 to the control module 100.

[0084] In this way, by connecting the voltage divider component in series with the solenoid valve load and collecting the current flowing through the voltage divider component as the current flowing through the solenoid valve load through the second operational amplifier, the current flowing through the solenoid valve load can be determined more accurately.

[0085] In some implementations, the voltage conversion module 200 may be a DCDC.

[0086] Here, the DCDC may output a first linear voltage and a second linear voltage to control the current flowing through the solenoid valve load 300. The solenoid valve load 300 may be an inductive load.

[0087] If you need to control multiple solenoid valve loads, you can use a separate circuit solution to set up multiple DCDCs to control the current flowing through multiple solenoid valve loads respectively. This is more flexible to use and has a wider range of material choices.

[0088] Furthermore, a relatively low-cost DCDC output voltage is used to control the current flowing through the solenoid valve load, eliminating the need for a relatively high-cost pre-driver chip and NMOS, thereby reducing costs.

[0089] In some implementations, the control module 100 may be an MCU.

[0090] Here, using MCU as the control module can reduce the power consumption of the control module and make it more flexible.

[0091] An embodiment of the present application also provides a vehicle, which may include the solenoid valve control circuit in the above embodiment.

[0092] It can be understood that the vehicle provided in this embodiment has the beneficial effects of the solenoid valve control circuit provided in the embodiment of the present application. For details, please refer to the specific description of the solenoid valve control circuit in the above embodiments, and the embodiments of the present application will not be repeated here.

[0093] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0094] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0095] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0096] The above reference is according to the method of the embodiment of the present application, the flow chart of the device (system) and the computer program product and / or the block diagram described various aspects of the present application.It should be understood that each square box in the flow chart and / or the block diagram and the combination of each square box in the flow chart and / or the block diagram can be realized by computer program instructions.These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the realization of the function / action specified in one or more square boxes of the flow chart and / or the block diagram.Such a processor can be but is not limited to a general-purpose processor, a special-purpose processor, a special application processor or a field programmable logic circuit.It can also be understood that each square box in the block diagram and / or the flow chart and the combination of the square boxes in the block diagram and / or the flow chart can also be realized by the dedicated hardware that performs the specified function or action, or can be realized by the combination of dedicated hardware and computer instructions.

[0097] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A solenoid valve control circuit, characterized in that: The circuit comprises: A control module, wherein an output end of the control module is connected to an input end of the voltage conversion module, and is used to output a control signal to the voltage conversion module based on a driving current required by a solenoid valve load; The voltage conversion module, whose output end is connected to the first end of the solenoid valve load, is used to output a first linear voltage to the solenoid valve load based on the control signal, so as to control the current flowing through the solenoid valve load based on the first linear voltage.

2. The circuit according to claim 1, characterized in that The control signal is a periodic pulse signal, and the circuit further includes: A filter module, wherein the input end of the filter module is connected to the output end of the control module, and the output end of the filter module is connected to the input end of the voltage conversion module, for filtering the control signal to obtain a DC signal, and outputting the DC signal to the voltage conversion module.

3. The circuit according to claim 2, characterized in that The filter module is a capacitor and resistor filter module.

4. The circuit according to claim 3, characterized in that The capacitor-resistor filter module includes at least one group of capacitor-resistor sub-filter modules, and the capacitor-resistor sub-filter module includes: A resistor, a first end of the resistor is connected to the output end of the control module, and a second end of the resistor is connected to the input end of the voltage conversion module; A capacitor, a first end of the capacitor is connected to the second end of the resistor, and a second end of the capacitor is grounded.

5. The circuit according to claim 1, characterized in that The circuit further comprises: A first operational amplifier, wherein the positive input terminal of the first operational amplifier is connected to the output terminal of the control module, the reverse input terminal of the first operational amplifier is connected to the output terminal of the first operational amplifier, and the output terminal of the first operational amplifier is connected to the input terminal of the voltage conversion module, is used to amplify the control signal and output the amplified control signal to the voltage conversion module.

6. The circuit according to claim 1, characterized in that The circuit further comprises: A sampling module, wherein the input end of the sampling module is connected to the output end of the voltage conversion module, and the output end of the sampling module is connected to the input end of the control module, and is used to collect the current flowing through the solenoid valve load and feed back the current flowing through the solenoid valve load to the control module; The control module is also used to calculate the difference between the current flowing through the solenoid valve load and the driving current to obtain a target current difference, match the target current difference with a preset corresponding relationship between the current difference and the adjustment signal to determine a target adjustment signal corresponding to the target current difference, and output the target adjustment signal to the voltage conversion module; The voltage conversion module is further configured to output a second linear voltage to the solenoid valve load based on the target adjustment signal, so as to control a current flowing through the solenoid valve load based on the second linear voltage.

7. The circuit according to claim 6, characterized in that The sampling module comprises: A voltage dividing component, wherein a first end of the voltage dividing component is connected to the output end of the voltage conversion module, and a second end of the voltage dividing component is connected to the first end of the solenoid valve load; A second operational amplifier, wherein the positive input terminal of the second operational amplifier is connected to the first end of the voltage divider component, the reverse input terminal of the second operational amplifier is connected to the second end of the voltage divider component, and the output terminal of the second operational amplifier is connected to the input terminal of the control module, and is used to collect the current flowing through the voltage divider component, obtain the current flowing through the solenoid valve load, and feed back the current flowing through the solenoid valve load to the control module.

8. The circuit according to claim 1, characterized in that The control module is a micro control unit MCU.

9. The circuit according to claim 1, characterized in that The voltage conversion module is a direct current to direct current converter DCDC.

10. A vehicle, characterized in that: The vehicle comprises the solenoid valve control circuit according to any one of claims 1-9.

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