A vehicle suspension control system

Abstract

The present invention provides a vehicle suspension control system, comprising: a controller for providing a control signal; a shock absorber including a hydraulic module and a solenoid valve, with some or all of the oil supply passages of the hydraulic module passing through the solenoid valve; the solenoid valve including an electrical signal transmission component and an oil passage opening control component, and the electrical signal transmission component of the solenoid valve adjusting the oil passage opening control component of the solenoid valve based on the control signal to control the oil supply amount of the hydraulic module; a solenoid valve control and temperature sensing circuit for controlling the operation of the solenoid valve, sensing the temperature of the electrical signal transmission component of the solenoid valve, and transmitting the temperature sensing parameter to the controller; the controller being configured to: when detecting that the temperature of the electrical signal transmission component of the solenoid valve exceeds a threshold value, issue a corresponding control signal to stop the operation of the solenoid valve. The present invention can achieve timely and accurate monitoring of the temperature of the solenoid valve while performing shock absorption control operations on the solenoid valve of the shock absorber.

Description

Technical Field

[0001] The present invention mainly relates to the field of automobiles, and particularly to a vehicle suspension control system. Background Art

[0002] With the development of automotive electrification and increasing intelligence, the vibration and noise of the whole vehicle are getting smaller and smaller. Vehicle users have more time to experience the driving and riding feelings. Therefore, the ride comfort and handling stability of the vehicle have become topics that need attention. The vehicle suspension is an important component for the vehicle to achieve the shock absorption function. How to improve the functional adaptability of the suspension is a problem that needs to be solved. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a vehicle suspension control system to achieve the stable and effective operation of the vehicle shock absorption system and ensure the shock absorption performance of the vehicle.

[0004] To solve the above technical problem, the present invention provides a vehicle suspension control system, including: a controller that provides a control signal; a shock absorber that includes a hydraulic module and a solenoid valve, and part or all of the oil supply passages of the hydraulic module pass through the solenoid valve; the solenoid valve includes an electrical signal transmission component and an oil passage opening control component, and the electrical signal transmission component of the solenoid valve adjusts the oil passage opening control component of the solenoid valve based on the control signal to control the oil supply amount of the hydraulic module; a solenoid valve control and temperature sensing circuit that controls the operation of the solenoid valve, senses the temperature of the electrical signal transmission component of the solenoid valve, and transmits the temperature sensing parameter to the controller; the controller is configured to: when it is detected that the temperature of the electrical signal transmission component of the solenoid valve exceeds a first temperature threshold, issue a corresponding control signal to stop the operation of the solenoid valve.

[0005] In an embodiment of the present invention, the solenoid valve control and temperature sensing circuit includes a switch circuit module, a current sensing module, and a voltage sensing module;

[0006] The switch circuit module includes a first transistor and a second transistor. The first end of the electrical signal transmission component is connected to the connection point of the first transistor and the second transistor. The current sensing module includes a first resistor connected in series with the electrical signal transmission component. The voltage sensing module includes a resistor string formed by a second resistor and a third resistor. The first end and the second end of the resistor string are respectively connected to the first end of the electrical signal transmission component and the second end of the first resistor;

[0007] The connection point of the first resistor and the electrical signal transmission component is connected to the controller as the current parameter sensing point of the electrical signal transmission component, and the connection point of the second resistor and the third resistor is connected to the controller as the voltage parameter sensing point of the electrical signal transmission component;

[0008] The controller is configured to: obtain an equivalent resistance value of the electrical signal transmission component based on measurement values at the current parameter sensing point and the voltage parameter sensing point when the first transistor and the second transistor are respectively turned on, and convert a temperature sensing value of the electrical signal transmission component based on the equivalent resistance value.

[0009] In an embodiment of the present invention, the switch circuit module performs turn-on and turn-off operations on the first transistor and the second transistor based on the received control signal to control the operation of the solenoid valve.

[0010] In an embodiment of the present invention, the controller obtaining the equivalent resistance value of the electrical signal transmission component based on measurement values at the current parameter sensing point and the voltage parameter sensing point when the first transistor and the second transistor are respectively turned on includes:

[0011] Obtaining a current value of the electrical signal transmission component based on a voltage measurement value at the current parameter sensing point and a resistance value of the first resistor;

[0012] Obtaining a sum of voltages of the electrical signal transmission component and the first resistor based on a voltage measurement value at the voltage parameter sensing point and a resistance value ratio of the second resistor and the third resistor;

[0013] Obtaining a voltage value of the electrical signal transmission component according to the sum of voltages and the voltage measurement value at the current parameter sensing point;

[0014] Obtaining the equivalent resistance value of the electrical signal transmission component according to the voltage value and the current value of the electrical signal transmission component.

[0015] In an embodiment of the present invention, the controller converting the temperature sensing value of the electrical signal transmission component based on the equivalent resistance value includes:

[0016] Converting to obtain the temperature sensing value of the electrical signal transmission component according to the equivalent resistance value and a resistance-temperature calibration curve of the electrical signal transmission component.

[0017] In an embodiment of the present invention, the solenoid valve control and temperature sensing circuit further includes a control signal driving module, and the control signal is transmitted to the switch circuit module through the control signal driving module.

[0018] In an embodiment of the present invention, the solenoid valve control and temperature sensing circuit further includes a signal amplification module, and measurement values at the current parameter sensing point and the voltage parameter sensing point when the first transistor and the second transistor are respectively turned on are transmitted to the controller through the signal amplification module.

[0019] In an embodiment of the present invention, the controller performs a filtering operation on the temperature sensing value.

[0020] In an embodiment of the present invention, the filtering method includes moving average filtering.

[0021] In an embodiment of the present invention, the shock absorber further includes an air spring module and a corresponding air pump and gas distribution valve, and the air pump and gas distribution valve control the air intake amount of the air spring module according to the control operation of the controller.

[0022] Compared with the prior art, the present invention has the following advantages: The technical solution of this application realizes shock control operation on the solenoid valve of the shock absorber while timely and accurately monitoring the temperature of the solenoid valve. When the working temperature of the solenoid valve exceeds the set threshold, the solenoid valve stops running to avoid damage and oil leakage caused by the solenoid valve running at high temperature for a long time, thereby playing a protective role for the shock absorber and realizing intelligent control of the vehicle suspension. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings are provided to further understand the present application, and they are incorporated and constitute a part of the present application. The drawings show embodiments of the present application and, together with this specification, serve to explain the principle of the present application.

[0024] In the drawings:

[0025] Figure 1 is a schematic diagram of the composition of a vehicle suspension system according to an embodiment of the present application.

[0026] Figure 2A is a schematic diagram of the structural composition of a solenoid valve according to an embodiment of the present application.

[0027] Figure 2B is a schematic diagram of the structural details of a solenoid valve according to an embodiment of the present application.

[0028] Figure 3 is a schematic diagram of the structure of a shock absorber according to an embodiment of the present application.

[0029] Figure 4A is a schematic diagram of the composition of a solenoid valve control and temperature sensing circuit according to an embodiment of the present application.

[0030] Figure 4B is a schematic diagram of the partial current direction of a solenoid valve control and temperature sensing circuit according to an embodiment of the present application.

[0031] Figure 4C is a schematic diagram of the partial current direction of a solenoid valve control and temperature sensing circuit according to an embodiment of the present application.

[0032] Figure 4DIt is a timing schematic diagram of the control signal of the solenoid valve control and temperature sensing circuit and the flowing current of the electrical signal transmission component of the solenoid valve in an embodiment of the present application.

[0033] Figure 5 It is a schematic diagram of the module composition of the controller in an embodiment of the present application.

[0034] Figure 6 It is a process schematic diagram of the controller obtaining the equivalent resistance value of the electrical signal transmission component based on the received temperature sensing parameters in an embodiment of the present application.

[0035] Figure 7 It is a schematic diagram of the resistance-temperature calibration curve in an embodiment of the present application. Detailed implementation manners

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following-described drawings are only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, the present application can also be applied to other similar scenarios based on these drawings. Unless obvious from the language context or otherwise stated, the same reference numerals in the figures represent the same structure or operation.

[0037] As shown in the present application and the claims, unless the context clearly indicates an exceptional situation, words such as "a", "an", "one" and / or "the" do not specifically refer to the singular, but may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0038] Unless otherwise specifically stated, the relative arrangements, numerical expressions and values of the components and steps described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0039] In addition, it should be noted that the use of words such as "first" and "second" to limit the components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, the above words have no special meaning, so they cannot be understood as limiting the protection scope of the present application. In addition, although the terms used in the present application are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant according to his or her judgment, and their detailed meanings are described in the relevant parts of the present description. In addition, it is required to understand the present application not only through the actual terms used, but also through the meaning implied by each term.

[0040] It should be understood that when a component is referred to as being "on another component", "connected to another component", "coupled to another component", or "in contact with another component", it can be directly on, connected to, or coupled to, or in contact with the other component, or there can be intervening components. In contrast, when a component is referred to as being "directly on another component", "directly connected to", "directly coupled to", or "directly in contact with" another component, there are no intervening components. Similarly, when a first component is referred to as being "electrically in contact with" or "electrically coupled to" a second component, there is an electrical path that permits current flow between the first component and the second component. The electrical path can include capacitors, coupled inductors, and / or other components that permit current flow, even if there is no direct contact between the conductive components.

[0041] Flowcharts are used in the present application to illustrate the operations performed by a system according to embodiments of the present application. It should be understood that the operations above or below do not necessarily have to be performed precisely in order. Instead, the various steps can be processed in reverse order or simultaneously. Also, other operations can be added to these processes, or one or more steps can be removed from these processes.

[0042] Embodiments of the present application describe a vehicle suspension control system.

[0043] Figure 1 is a schematic diagram of the composition of a vehicle suspension system according to an embodiment of the present application. As Figure 1 shown, the vehicle suspension control system 100 includes a controller 101 and a shock absorber 111. The shock absorber (CDC, Continuous Damping Control) 111 includes a hydraulic module 121 and a solenoid valve 122. Figure 2A is a schematic diagram of the structural composition of a solenoid valve according to an embodiment of the present application. Figure 2B is a schematic diagram of the structural details of a solenoid valve according to an embodiment of the present application. Refer to Figure 1 Figure 2A and Figure 2B, the vehicle suspension control system 100 further includes a solenoid valve control and temperature sensing circuit 131. The controller 101 provides a control signal sg, and the solenoid valve control and temperature sensing circuit 131 controls the operation of the solenoid valve 122 based on the control signal sg. Part or all of the oil supply passages of the hydraulic module 121 pass through the solenoid valve 122. The solenoid valve 122 includes an electrical signal transmission component 151 and an oil passage opening control component 152. The electrical signal transmission component 151 of the solenoid valve 122 generates an electromagnetic force F based on the control signal sg to adjust the oil passage opening control component 152 of the solenoid valve 122, so as to control the oil supply amount of the hydraulic module 121. The oil supply amount of the hydraulic module 121 affects the magnitude of the damping force that the hydraulic module 121 can provide, thereby affecting the shock absorption performance of the vehicle suspension. Figure 2A The arrows 171 and 172 in it are the direction schematics of the inlet valve oil passage and the outlet valve oil passage, and the leads 161 and 162 schematically show the two connection terminals of the electrical signal transmission component 151 of the solenoid valve 122. Figure 2B In it, 221 is the primary spool, 224 is the main spool, 223 is the pilot spring, 227 is the main spring, 225 is the pilot throttle orifice, 226 is the proportional throttle orifice, 228 is the fixed throttle orifice, 172a is the main oil passage, and 172b is the control oil passage.

[0044] The solenoid valve control and temperature sensing circuit 131 also senses the temperature of the electrical signal transmission component 151 of the solenoid valve 122 and transmits the temperature sensing parameter to the controller 101. The controller 101 is configured to issue a corresponding control signal to stop the operation of the solenoid valve 122 when it detects that the temperature of the electrical signal transmission component 151 of the solenoid valve 122 exceeds the first temperature threshold.

[0045] Figure 3 is a schematic structural diagram of a shock absorber according to an embodiment of the present application. As Figure 3 shown, the first end 301 and the second end 302 of the shock absorber 111 are respectively installed on the corresponding interfaces at the bottom of the vehicle body structure and the vehicle axle, so as to form a shock absorption structure (which can also be referred to as a part of the vehicle suspension) between the vehicle body structure and the vehicle axle. The hydraulic module 121 is installed in the cylinder structure 212 of the shock absorber 111, and the specific structure of the hydraulic module 121 is not shown in Figure 3 In it. The structure 171 is a dust cover. An air spring module 181 is also provided on the outer periphery of the shock absorber 111, and the air spring module 181 is configured with a corresponding air pump and gas distribution valve. The air pump and the gas distribution valve control the air intake amount of the air spring module according to the control operation of the controller 101. The air spring module 181 is installed, for example, on the outer periphery of the cylinder structure 212. The cooperation between the air spring module 181 and the hydraulic module 121 of the shock absorber 111 achieves a better shock absorption effect.

[0046] Figure 4ASchematic diagram of the composition of the solenoid valve control and temperature sensing circuit of an embodiment of the present application. Figure 4A , the solenoid valve control and temperature sensing circuit 131 includes a switching circuit module, a current sensing module and a voltage sensing module. The switching circuit module includes a first transistor Q1 and a second transistor Q2. The connection point P0 (more specifically, the gate terminal HO and the gate terminal LO) of the first transistor Q1 and the second transistor Q2 receives a control signal sg. The first end of the electrical signal transmission component 151 is connected to the connection point P0 of the first transistor and the second transistor or the lead-out terminal P1 of the connection point P0. The switching circuit module turns on and off the first transistor Q1 and the second transistor Q2 based on the received control signal sg to control the operation of the solenoid valve 122. The current sensing module includes a first resistor R1 connected in series with the electrical signal transmission component 151. The voltage sensing module includes a resistor string formed by a second resistor R2 and a third resistor R3. The first end and the second end of the resistor string are respectively connected to the first end 161 of the electrical signal transmission component 151 and the second end of the first resistor R1. The connection point P2 between the first resistor R1 and the electric signal transmission component 151 is connected to the controller 101 as a current parameter sensing point of the electric signal transmission component 151, and the connection point between the second resistor R2 and the third resistor R3 is connected to the controller 101 as a voltage parameter sensing point P3 of the electric signal transmission component 151 to transmit the temperature sensing parameter to the controller 101. The switch module can also be connected in parallel with a capacitor C3 to filter the power supply Vcc1 to achieve voltage stabilization.

[0047] Figure 4B It is a partial current direction schematic diagram of a solenoid valve control and temperature sensing circuit according to an embodiment of the present application. Figure 4C Schematic diagram of partial current direction of a solenoid valve control and temperature sensing circuit according to an embodiment of the present application. Figure 4B When the control signal sg drives the first transistor Q1 to turn on, the current direction Pr1 of the switch circuit module and the current sensing module is, starting from Vcc1, flowing through the first transistor Q1, passing through the electrical signal transmission component 151 of the solenoid valve 122, the first resistor R1 to the ground terminal GND. The current flow direction in the resistor string composed of the second resistor R2 and the third resistor R3 is the same as that of the resistor R1. Figure 4C When the control signal sg drives the second transistor Q2 to turn on (when the first transistor Q1 is turned off), the current direction Pr2 of the switch circuit module and the current sensing module is, starting from the electrical signal transmission component 151 of the solenoid valve 122, and passing through the second transistor Q2 for freewheeling. When the first transistor Q1 is turned off, the freewheeling diode D1 takes over the freewheeling current. After the second transistor Q2 is turned on, the freewheeling current flows through the second transistor Q2. The freewheeling diode D1 can still accelerate the current release and improve the current response speed. Figure 4DIt is a timing diagram of the control signal sg of the solenoid valve control and temperature sensing circuit and the flowing current of the electrical signal transmission component of the solenoid valve in an embodiment of the present application. Refer to Figure 4D , as the high and low levels of the control signal sg change, the electrical signal transmission component 151 of the solenoid valve 122 also undergoes a charging and discharging process. The electrical signal transmission component 151 of the solenoid valve 122 includes, for example, an inductive element.

[0048] In some embodiments, refer to Figure 4A , the solenoid valve control and temperature sensing circuit 131 further includes a control signal driving module M1 and a signal amplifying module M2. The control signal driving module M1 processes the control signal sg through the driving chip U2 and then transmits it to the switching circuit module. The output terminal Pout of the controller 101 outputs the control signal sg. The control signal sg includes, for example, a PWM (pulse width modulation) signal. By adjusting the duty cycle of the PWM signal transmitted to the electrical signal transmission component 151 of the solenoid valve 122, the oil passage opening degree of the oil passage opening degree control component 152 of the solenoid valve 122 is controlled. The control signal driving module M1 further includes peripheral components connected to the driving chip U2, including a diode D1, a capacitor C1, and a capacitor C2. When the controller 101 detects that the temperature of the electrical signal transmission component 151 of the solenoid valve 22 exceeds the first temperature threshold, a corresponding control signal is issued, such as a low-level signal or a PWM signal with a duty cycle reduced to zero to stop the operation of the solenoid valve.

[0049] The signal amplifying module M2 includes, for example, a first amplifier module Amp1 and a second amplifier module Amp2. The first amplifier module Amp1 and the second amplifier module Amp2 respectively amplify the voltage measurement values Test_V1 at the current parameter measurement point P2 and the voltage measurement values Test_V2 at the voltage parameter measurement point P3 to form amplified signals Mcu_V1 and Mcu_V2, and transmit them to the first input terminal Pin1 and the second input terminal Pin2 of the controller 101. The amplification factors of the first amplifier module Amp1 and the second amplifier module Amp2 can be set as needed, such as 2 times, 5 times, or 10 times, or unity gain (i.e., the amplification factor is 1 time) to serve as a buffer stage circuit. The connection methods of the components at the positive input terminal, negative input terminal, and output terminal of the first amplifier module Amp1 and the second amplifier module Amp2 also vary according to the different amplification factors.

[0050] The controller 101 is configured to obtain the equivalent resistance value of the electrical signal transmission component 151 based on the measurement values at the current parameter measurement point P2 and the voltage parameter measurement point P3 when the first transistor Q1 and the second transistor Q2 are respectively turned on, and convert the temperature sensing value of the electrical signal transmission component 151 based on the equivalent resistance value.

[0051] Figure 6 This is a schematic diagram of the process by which a controller according to an embodiment of the present application obtains the equivalent resistance value of an electrical signal transmission component based on received temperature sensing parameters. Refer to Figure 6 , the controller 101 obtaining the equivalent resistance value Re of the electrical signal transmission component 151 based on the measured values at the current parameter sensing point and the voltage parameter sensing point when the first transistor Q1 and the second transistor Q2 are respectively turned on includes the following steps: Step 601, obtaining the current value Ie of the electrical signal transmission component 151 based on the voltage measurement value Test_V1 at the current parameter sensing point P2 and the resistance value of the first resistor R1. For example, Ie = Test_V1 / R1. Step 602, obtaining the sum of voltages V0 of the electrical signal transmission component 151 and the first resistor R1 based on the voltage measurement value Test_V2 at the voltage parameter sensing point P3 and the resistance value ratio of the second resistor R2 and the third resistor R3. For example, V0 = Test_V2 / [R3 / (R2 + R3)]. Step 603, obtaining the voltage value Ve of the electrical signal transmission component 151 according to the sum of voltages V0 and the voltage measurement value Test_V1 at the current parameter sensing point P2. For example, Ve = V0 - Test_V1; Step 604, obtaining the equivalent resistance value Re of the electrical signal transmission component 151 according to the voltage value Ve of the electrical signal transmission component 151 and the current value Ie of the electrical signal transmission component 151. For example, Re = Ve / Ie. When performing parameter calculation, the current value Ie can be calculated, for example, by sampling the periodic waveform value and then calculating the average value of the sampled values within the period T to obtain Ie-eq. The sampling times are, for example, sampled when the first transistor Q1 and the second transistor Q2 are respectively turned on. The sampling times are, for example, sampled 2 times, 3 times, 4 times,... etc. when the first transistor Q1 and the second transistor Q2 are respectively turned on, and then the average value is calculated to obtain the equivalent value Ie-eq. The numerical value corresponding to the equivalent value Ie-eq can be depicted to form Figure 4D the straight line or curve 431 in Figure 5 This is a schematic diagram of the module composition of a controller according to an embodiment of the present application. Refer to Figure 5 and Figure 6 , Step 601 is executed, for example, by the solenoid valve current detection module 501 in the controller 101. Step 602 and Step 603 are executed, for example, by the solenoid valve voltage detection module 502 in the controller 101. Step 604 is executed, for example, by the solenoid valve equivalent resistance value acquisition module 503 in the controller 101. Data and instructions can be transmitted between the respective component modules of the controller 101. When performing parameter calculation, the controller 101 can also perform corresponding parameter value analog-to-digital conversion or digital-to-analog conversion processes.

[0052] The temperature sensing value of the electrical signal transmission component 151 converted by the controller 101 based on the equivalent resistance value Re includes: according to the equivalent resistance value Re and the resistance-temperature calibration curve of the electrical signal transmission component 151 of the solenoid valve 122, the temperature sensing value of the electrical signal transmission component 151 is converted. This operation is performed, for example, by Figure 5 the temperature value acquisition and filtering module 504 in Figure 7 FIG. 4 is a schematic diagram of the resistance-temperature calibration curve of an embodiment of the present application. As Figure 7 shown, the horizontal axis of the coordinate system where the resistance-temperature calibration curve is located is resistance (unit: ohm / Ω), and the vertical axis is temperature (unit: degree Celsius / °C). The process of obtaining the resistance-temperature calibration curve is, for example, by placing the solenoid valve 122 in an adjustable temperature chamber, adjusting the internal temperature of the temperature chamber to different temperature values, and after the thermal equilibrium process, measuring the equivalent resistance value of the electrical signal transmission component 151 of the solenoid valve 122. After setting multiple different temperature values and measuring the corresponding different equivalent resistance values, a temperature-resistance calibration table is formed. Based on the temperature-resistance calibration table, the corresponding coordinate points are marked in the coordinate system, and then the corresponding resistance-temperature calibration curve can be fitted and drawn. Specifically, for example Figure 7 curve 701 in FIG. 5. It is assumed that curve 701 can be fitted to form a linear curve that can be approximately characterized by the equation y = kx + b. Curve 701 can also be in other forms, such as a quadratic curve. The controller 101 can also perform a filtering operation on the temperature sensing value to improve the numerical representation accuracy. The filtering method is, for example, moving average filtering. The filtering operation is performed, for example, by Figure 5 the temperature value acquisition and filtering module 504 of the controller 101 in

[0053] The vehicle suspension control system of the present application realizes timely and accurate monitoring of the temperature of the solenoid valve while performing shock absorption control operations on the solenoid valve of the shock absorber. When the working temperature of the solenoid valve exceeds the set threshold due to the vehicle driving on a bad road surface for a long time, the solenoid valve is stopped from operating to avoid damage and oil leakage failure caused by the solenoid valve operating at high temperature for a long time, thereby playing a protective role for the shock absorber, avoiding affecting the overall performance of the shock absorber, and realizing intelligent control of the vehicle suspension.

[0054] The technical solution of the present application takes the solenoid valve as both a load of the vehicle suspension control system and a temperature sensing device, realizing monitoring of the temperature of the solenoid valve while performing shock absorption control operations on the solenoid valve, without the need to additionally set a temperature sensor, saving the corresponding device cost, wiring process, and additional system integration operations.

[0055] The basic concepts have been described above. Obviously, for those skilled in the art, the above invention disclosure is only an example and does not constitute a limitation to this application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, so such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of this application.

[0056] Meanwhile, this application uses specific terms to describe the embodiments of this application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0057] Some aspects of this application can be executed entirely by hardware, can be executed entirely by software (including firmware, resident software, microcode, etc.), or can be executed by a combination of hardware and software. The above hardware or software can all be referred to as "data blocks", "modules", "engines", "units", "components", or "systems". The processor can be one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DAPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, or combinations thereof. In addition, aspects of this application may be embodied as a computer product located in one or more computer-readable media, which includes computer-readable program code. For example, the computer-readable media may include, but is not limited to, magnetic storage devices, optical discs, smart cards, and flash memory devices.

[0058] Similarly, it should be noted that, in order to simplify the expression of this application disclosure and thus help the understanding of one or more invention embodiments, in the previous description of the embodiments of this application, sometimes multiple features are merged into one embodiment, drawing, or the description thereof. However, this disclosure method does not mean that the features required by the subject matter of this application are more than those mentioned in the claims. In fact, the features of the embodiments are fewer than all the features of the individual embodiments disclosed above.

[0059] Although the present application has been described with reference to current specific embodiments, those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions can be made without departing from the spirit of the present application. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. A vehicle suspension control system, comprising: A controller that provides a control signal; A shock absorber, including a hydraulic module and a solenoid valve, and part or all of the oil supply passages of the hydraulic module pass through the solenoid valve; The solenoid valve includes an electrical signal transmission component and an oil passage opening control component. The electrical signal transmission component of the solenoid valve adjusts the oil passage opening control component of the solenoid valve based on the control signal to control the oil supply amount of the hydraulic module; A solenoid valve control and temperature sensing circuit that controls the operation of the solenoid valve, senses the temperature of the electrical signal transmission component of the solenoid valve, and transmits the temperature sensing parameter to the controller; The controller is configured to: when it is detected that the temperature of the electrical signal transmission component of the solenoid valve exceeds a first temperature threshold, issue a corresponding control signal to stop the operation of the solenoid valve; The solenoid valve control and temperature sensing circuit includes a switch circuit module, a current sensing module, and a voltage sensing module; The switch circuit module includes a first transistor and a second transistor. A first end of the electrical signal transmission component is connected to the connection point of the first transistor and the second transistor. The current sensing module includes a first resistor connected in series with the electrical signal transmission component. The voltage sensing module includes a resistor string formed by a second resistor and a third resistor. A first end and a second end of the resistor string are respectively connected to the first end of the electrical signal transmission component and a second end of the first resistor; A connection point of the first resistor and the electrical signal transmission component is connected to the controller as a current parameter sensing point of the electrical signal transmission component, and a connection point of the second resistor and the third resistor is connected to the controller as a voltage parameter sensing point of the electrical signal transmission component; The controller is configured to: obtain an equivalent resistance value of the electrical signal transmission component based on measurement values at the current parameter sensing point and the voltage parameter sensing point when the first transistor and the second transistor are respectively turned on, and convert the equivalent resistance value to obtain a temperature sensing value of the electrical signal transmission component.

2. The vehicle suspension control system according to claim 1, wherein, The switch circuit module performs an on and off operation on the first transistor and the second transistor based on the received control signal to control the operation of the solenoid valve.

3. The vehicle suspension control system according to claim 1, wherein, The controller obtaining the equivalent resistance value of the electrical signal transmission component based on measurement values at the current parameter sensing point and the voltage parameter sensing point when the first transistor and the second transistor are respectively turned on includes: Obtaining a current value of the electrical signal transmission component based on a voltage measurement value at the current parameter sensing point and a resistance value of the first resistor; Obtaining a sum of voltages of the electrical signal transmission component and the first resistor based on a voltage measurement value at the voltage parameter sensing point and a resistance value ratio of the second resistor and the third resistor; Obtaining a voltage value of the electrical signal transmission component according to the sum of voltages and a voltage measurement value at the current parameter sensing point; Obtaining an equivalent resistance value of the electrical signal transmission component according to the voltage value and the current value of the electrical signal transmission component.

4. The vehicle suspension control system according to claim 1, wherein, The controller converting the equivalent resistance value to obtain a temperature sensing value of the electrical signal transmission component includes: According to the equivalent resistance value and the resistance-temperature calibration curve of the electrical signal transmission component, the temperature sensing value of the electrical signal transmission component is obtained through conversion.

5. The vehicle suspension control system according to claim 1, wherein, The solenoid valve control and temperature sensing circuit further includes a control signal driving module, and the control signal is transmitted to the switch circuit module through the control signal driving module.

6. The vehicle suspension control system according to claim 1, wherein, The solenoid valve control and temperature sensing circuit further includes a signal amplification module, and the measured values of the current parameter sensing point and the voltage parameter sensing point when the first transistor and the second transistor are respectively turned on are transmitted to the controller through the signal amplification module.

7. The vehicle suspension control system according to claim 1, wherein, The controller performs a filtering operation on the temperature sensing value.

8. The vehicle suspension control system according to claim 7, wherein, The filtering method includes moving average filtering.

9. The vehicle suspension control system according to claim 1, wherein, An air spring module is further provided on the outer periphery of the shock absorber. The air spring module is configured with a corresponding air pump and a gas distribution valve, and the air pump and the gas distribution valve control the air intake amount of the air spring module according to the control operation of the controller.

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