A driving and protection circuit for intelligent actuator, engine and vehicle

Abstract

The present invention relates to the field of circuit technology, and in particular to a driving and protection circuit, an engine and a vehicle for an intelligent actuator. The driving and protection circuit for an intelligent actuator described in the present invention comprises: a push-pull module, a first protection module and a second protection module; one end of the push-pull module is connected to one end of the first protection module, the other end is connected to one end of the second protection module, and the signal output end is connected to the intelligent actuator; the other end of the first protection module is connected to the input voltage end; the other end of the second protection module is connected to the ground end. The advantages of the present application are: through the push-pull module, it is possible to generate a PWM driving signal for driving the intelligent actuator through only one input control signal, with low cost and high stability; short-circuit protection to the ground is achieved through the first protection module, and short-circuit protection to the power supply end is achieved through the second protection module, thereby further improving stability and safety.

Description

Technical Field

[0001] The present application relates to the field of circuit technology, and in particular to a driving and protection circuit, an engine and a vehicle for an intelligent actuator. Background Art

[0002] With the current trend of intelligent engine electrical actuators, most of the current intelligent actuators draw power from the positive and negative poles of the battery. The controller is only responsible for providing a low-voltage PWM control signal to drive the intelligent actuator. However, the existing controller high-side drive and low-side drive cannot provide low-voltage PWM control signals. Therefore, the original high-side or low-side power drive of the current controller is difficult to drive this intelligent actuator.

[0003] like Figure 1 As shown, the existing controller technology route is mostly to use one power high-side drive pin and one power low-side drive pin. Although a resistor can be added to the wiring harness to achieve voltage PWM output, the input Figure 1 The circuit shown needs to control the NPN tube through the output signal of the power driver chip. However, the power driver chip is expensive and occupies a large PCB area. It is extremely wasteful of resources and pins to realize the signal-level PWM output. In addition, although the method of adding resistors to the wiring harness can realize the PWM function, the resistors will heat up when working, and there is no heat dissipation structure inside the wiring harness itself, which is a risk to the stability of the wiring harness and the stability of the resistors.

[0004] In summary, it is necessary to provide a driving and protection circuit, an engine and a vehicle for an intelligent actuator with low cost and high stability. Summary of the invention

[0005] To solve the above problems, the present application proposes a driving and protection circuit, an engine and a vehicle for an intelligent actuator.

[0006] On the one hand, the present application proposes a driving and protection circuit for a smart actuator, comprising: a push-pull module, a first protection module, and a second protection module;

[0007] One end of the push-pull module is connected to one end of the first protection module, and the other end is connected to one end of the second protection module, and the signal output end is connected to the intelligent actuator; the other end of the first protection module is connected to the input voltage end; the other end of the second protection module is connected to the ground end;

[0008] The push-pull module is used to pull up or down the driving signal for output according to the input signal;

[0009] The first protection module is used to reduce the voltage input from the input voltage terminal to the push-pull module when the signal output terminal of the push-pull module is connected to the ground terminal;

[0010] The second protection module is used to reduce the voltage input from the power supply end to the push-pull module when the output signal output end of the push-pull module is connected to the power supply end.

[0011] Further, in the driving and protection circuit as described above, the push-pull module includes an upper tube unit, a lower tube unit and a protection unit;

[0012] The signal input end of the upper tube unit is connected to one end of the protection unit, and the signal output end is connected to the signal output end of the lower tube unit;

[0013] The signal input end of the lower tube unit is connected to the other end of the protection unit;

[0014] The protection unit is also connected to the ground terminal.

[0015] Further, in the driving and protection circuit as described above, the protection unit comprises: a diode and a first resistor;

[0016] The anode of the diode is connected to the signal input end and the signal input end of the upper tube unit, and the cathode is connected to one end of the first resistor and the signal input end of the lower tube unit;

[0017] The other end of the first resistor is connected to the ground end.

[0018] Further, in the driving and protection circuit as described above, the upper tube unit comprises: a first triode and a second resistor;

[0019] The base of the first triode is connected to one end of the second resistor, the emitter is connected to the signal output end of the lower tube unit, and the collector is connected to one end of the first protection module;

[0020] The other end of the second resistor is connected to the anode of the diode.

[0021] Further, in the driving and protection circuit as described above, the lower tube unit comprises: a second triode and a third resistor;

[0022] The emitter of the second triode is connected to the signal output end of the upper tube unit, the collector is connected to one end of the second protection module, and the base is connected to one end of the third resistor;

[0023] The other end of the third resistor is connected to the cathode of the diode.

[0024] Further, in the driving and protection circuit as described above, the first protection module includes: a third triode, a fourth resistor, a fifth resistor and a sixth resistor;

[0025] The emitter of the third triode is connected to one end of the fourth resistor, the collector is connected to one end of the push-pull module, and the base is connected to one end of the fifth resistor and one end of the sixth resistor;

[0026] The other end of the fourth resistor and the other end of the fifth resistor are both connected to the input voltage terminal;

[0027] The other end of the sixth resistor is connected to the ground end.

[0028] Further, in the driving and protection circuit as described above, the second protection module includes: a fourth transistor, a seventh resistor, an eighth resistor and a ninth resistor;

[0029] The collector of the fourth transistor is connected to the other end of the push-pull module, the emitter is connected to one end of the seventh resistor, and the base is connected to one end of the eighth resistor and one end of the ninth resistor;

[0030] The other end of the seventh resistor and the other end of the eighth resistor are both connected to the ground terminal;

[0031] The other end of the ninth resistor is connected to the input voltage end.

[0032] Furthermore, the driving and protection circuit as described above further includes a diagnostic voltage acquisition module;

[0033] One end of the diagnosis voltage acquisition module is connected to the output end of the push-pull module, and the other end is connected to the ground end.

[0034] In a second aspect, the present application proposes an engine, comprising: comprising: a driving and protection circuit for an intelligent actuator as described in any one of the first aspect.

[0035] In a third aspect, the present application proposes a vehicle, comprising: an engine as described in the second aspect.

[0036] The advantages of the present application are: through the push-pull module, it is possible to generate a PWM drive signal for driving the intelligent actuator through only one input control signal, which is low in cost and high in stability; short-circuit protection to the ground is achieved through the first protection module, and short-circuit protection to the power supply end is achieved through the second protection module, thereby further improving stability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present application. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0038] Figure 1 is a schematic diagram of an existing controller;

[0039] Figure 2 It is a schematic diagram of an existing push-pull drive circuit with clamp protection;

[0040] Figure 3 is a schematic diagram of a driving and protection circuit for an intelligent actuator provided by the present application;

[0041] Figure 4 is a schematic diagram of another driving and protection circuit for a smart actuator provided by the present application;

[0042] Figure 5 It is a schematic diagram of the high-level current flow direction of a driving and protection circuit for a smart actuator provided by the present application;

[0043] Figure 6 It is a schematic diagram of the low-level current flow direction of a driving and protection circuit for a smart actuator provided by the present application;

[0044] Figure 7 It is a schematic diagram of the current flow direction of a short circuit at the power supply end of a driving and protection circuit for an intelligent actuator provided by the present application;

[0045] Figure 8 It is a schematic diagram of the current flow direction of a short circuit to ground of a driving and protection circuit for an intelligent actuator provided by the present application;

[0046] Fig. 9 It is a schematic diagram of a simulation of a driving and protection circuit of an intelligent actuator under normal working conditions provided by the present application;

[0047] Fig.10 It is a schematic diagram of a simulation of a driving and protection circuit for an intelligent actuator provided by the present application when the circuit is short-circuited to a power supply terminal;

[0048] Fig.11 This is a schematic diagram of a simulation of a driving and protection circuit for an intelligent actuator provided in the present application when the circuit is short-circuited to the ground terminal. DETAILED DESCRIPTION

[0049] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0050] Since the existing controller high-side driver and low-side driver cannot provide low-voltage PWM control signals for the smart actuator, it is necessary to add a resistor to the wiring harness to achieve voltage PWM output. Although PWM drive signals can also be output through push-pull circuits, Figure 2 As shown, the existing push-pull circuit requires the driver chip to provide a driving high end and a driving low end, and to amplify the signals of the driving high end and the driving low end respectively.

[0051] like Figure 2 As shown, a push-pull drive circuit with clamp protection includes a drive chip, the drive high end (HVG) of the drive chip is connected to a first push-pull drive circuit, the first push-pull drive circuit is connected to an isolation drive circuit through a secondary inductor and a primary inductor, and the isolation drive circuit includes a triode, a resistor, a clamping diode, a voltage regulator, a filter inductor and a MOS tube. The drive low end (LVG) of the drive chip is also connected to a second push-pull drive circuit, and the second push-pull drive circuit is connected to a non-isolated drive circuit, and the non-isolated drive circuit includes a triode, a resistor, a clamping diode, a voltage regulator, a filter inductor and a MOS tube.

[0052] However, using a driver chip not only increases costs, but also takes up PCB area. In addition, since diodes are prone to overheating and are easily affected by temperature changes, using diodes for overcurrent protection also poses stability risks.

[0053] To solve the above problems, in the first aspect, according to the implementation of the present application, a driving and protection circuit for an intelligent actuator is proposed, such as Figure 3As shown, it includes: a push-pull module 300, a first protection module 100 and a second protection module 200. One end of the push-pull module 300 is connected to one end of the first protection module 100, the other end is connected to one end of the second protection module 200, and the signal output end is connected to the intelligent actuator; the other end of the first protection module 100 is connected to the input voltage end; the other end of the second protection module 200 is connected to the ground end GND. The push-pull module 300 is used to pull up or down the drive signal for output according to the input signal. The first protection module 100 is used to reduce the voltage input from the input voltage end to the push-pull module 300 when the signal output end of the push-pull module 300 is connected to the ground end GND. The second protection module 200 is used to reduce the voltage input from the power supply end to the push-pull module 300 when the signal output end of the push-pull module 300 is connected to the power supply end.

[0054] The input voltage terminal outputs a 6.3V voltage to the first protection module 100 and the second protection module 200. The signal output terminal is connected to the intelligent actuator through an output signal line. Figure 3 As shown, the signal input end of the push-pull module 300 receives the input signal, and the signal input end can be connected to a processing module, such as a single-chip microcomputer, through an input signal line to receive the control signal output by the processing module as an input signal. Since the output PWM control signal is used to drive the intelligent actuator, in the embodiment of the present application, the output PWM control signal is a drive signal.

[0055] like Figure 4 As shown, the push-pull module 300 includes an upper tube unit 301, a lower tube unit 302 and a protection unit 303. The signal input end of the upper tube unit 301 is connected to one end of the protection unit 303, and the signal output end is connected to the signal output end of the lower tube unit 302. The signal input end of the lower tube unit 302 is connected to the other end of the protection unit 303. The protection unit 303 is also connected to the ground terminal GND.

[0056] like Figure 4 As shown, the protection unit 303 includes: a diode D1 and a first resistor R1. The anode of the diode D1 is connected to the signal input terminal and the signal input terminal of the upper tube unit 301, and the cathode is connected to one end of the first resistor R1 and the signal input terminal of the lower tube unit 302. The other end of the first resistor R1 is connected to the ground terminal GND.

[0057] like Figure 4 As shown, the upper tube unit 301 includes: a first triode Q1 and a second resistor R2. The base of the first triode Q1 is connected to one end of the second resistor R2, the emitter is connected to the signal output end of the lower tube unit 302, and the collector is connected to one end of the first protection module 100. The other end of the second resistor R2 is connected to the positive electrode of the diode D1.

[0058] like Figure 4 As shown, the lower tube unit 302 includes: a second triode Q2 and a third resistor R3. The emitter of the second triode Q2 is connected to the signal output end of the upper tube unit 301, the collector is connected to one end of the second protection module 200, and the base is connected to one end of the third resistor R3. The other end of the third resistor R3 is connected to the cathode of the diode D1.

[0059] like Figure 4 As shown, the first protection module 100 includes: a third triode Q3, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6. The emitter of the third triode Q3 is connected to one end of the fourth resistor R4, the collector is connected to one end of the push-pull module 300, and the base is connected to one end of the fifth resistor R5 and one end of the sixth resistor R6. The other end of the fourth resistor R4 and the other end of the fifth resistor R5 are both connected to the input voltage terminal. The other end of the sixth resistor R6 is connected to the ground terminal GND.

[0060] like Figure 4 As shown, the second protection module 200 includes: a fourth triode Q4, a seventh resistor R7, an eighth resistor R8 and a ninth resistor R9. The collector of the fourth triode Q4 is connected to the other end of the push-pull module 300, the emitter is connected to one end of the seventh resistor R7, and the base is connected to one end of the eighth resistor R8 and one end of the ninth resistor R9. The other end of the seventh resistor R7 and the other end of the eighth resistor R8 are both connected to the ground terminal GND. The other end of the ninth resistor R9 is connected to the input voltage terminal.

[0061] like Figure 4 As shown, it also includes a diagnosis voltage acquisition module 400. One end of the diagnosis voltage acquisition module 400 is connected to the output end of the push-pull module 300, and the other end is connected to the ground end GND.

[0062] like Figure 4 As shown, the diagnostic voltage acquisition module 400 includes: an eleventh resistor R11 and a twelfth resistor R12. One end of the eleventh resistor R11 is connected to the output end of the push-pull module 300, and the other end is connected to the twelfth resistor R12 for outputting the diagnostic voltage. The other end of the twelfth resistor R12 is connected to the ground terminal GND.

[0063] The following is a further description of the implementation of the embodiments of the present application.

[0064] like Figure 4As shown, the implementation of the embodiment of the present application includes: a push-pull module 300, a first protection module 100, a second protection module 200 and a diagnostic voltage acquisition module 400. Among them, the push-pull module 300 includes an upper tube unit 301, a lower tube unit 302 and a protection unit 303. Since the PWM input signal (drive signal) of the smart actuator is mostly a high-impedance input, the smart actuator is embodied in the circuit in the form of an equivalent load, wherein the equivalent load is simulated using a tenth resistor R10 of 1MΩ.

[0065] The diode D1 in the protection unit 303 is an anti-backflow diode. The anti-backflow diode is used to prevent the voltage at the power supply end from flowing back to the input signal line through the forward biased diode of the transistor when the output signal line is short-circuited to the power supply end. The upper tube unit 301 is used to pull the output signal high. The lower tube unit 302 is used to pull the output signal low. The first protection module 100 is used to prevent the first transistor Q1 and the third transistor Q3 from flowing through a large current to damage the device when the output signal line is short-circuited to the ground (ground terminal GND).

[0066] The first protection module 100 is used to prevent the second transistor Q2 and the fourth transistor Q4 from flowing through a large current to damage the device when the output signal line is short-circuited to the power supply terminal. The diagnostic voltage acquisition module 400 is used to collect the voltage of the output drive signal. If a short-circuit to the power supply terminal or a short-circuit to the ground terminal GND occurs, the collected voltage is reported to a processing module, such as a single-chip microcomputer. The processing module can separate and report the fault by judging the received voltage.

[0067] like Figure 5 As shown, when the input signal is high, the first transistor Q1, the third transistor Q3 and the fourth transistor Q4 are turned on, and the second transistor Q2 is turned off (disconnected). At this time, the level of the output drive signal is the input signal minus 0.4V, and the output is also high. At this time, the current flows as follows Figure 5 As shown, the input signal is transmitted to the upper tube unit 301, so that the upper tube unit 301 outputs a part of the current generated by the input voltage terminal to the ground terminal GND, and outputs the other part to the intelligent actuator through the output signal line.

[0068] like Figure 6 As shown in the figure, when the input signal is low, the second transistor Q2, the third transistor Q3 and the fourth transistor Q4 are turned on, and the first transistor Q1 is turned off. At this time, for the smart actuator without a reserved pull-up resistor interface, that is, if there is no pull-up resistor on the output signal line, the output level is 0, and the output is also low; for the smart actuator with a reserved pull-up resistor interface, that is, if there is a pull-up resistor on the output signal line, the output voltage is 0.4V, and the output is also low. The current flows as shown in the figure. Figure 6As shown, the current on the output signal line flows to the ground terminal GND through the lower tube unit 302 and the push-pull module 300, and the lower tube unit 302 also outputs the current generated by the input voltage terminal to the ground terminal GND.

[0069] like Figure 7 As shown, when the signal output terminal is short-circuited to the power supply terminal, the first transistor Q1 (upper tube) is closed, the upper tube is risk-free, the second transistor Q2 and the fourth transistor Q4 are turned on, and the current at the power supply terminal flows through the seventh resistor R7. When the current continues to increase, the emitter voltage of the fourth transistor Q4 increases, limiting the opening of the fourth transistor Q4, thereby maintaining the current flowing from the power supply terminal to the lower tube unit 302 at about 20mA to protect the entire circuit. At this time, the diagnostic voltage acquisition module 400 collects the voltage short-circuited to the power supply terminal, and then can output it to the processing module, and the processing module will report the fault. The current flows as shown in the figure. Figure 7 As shown, the current input to the push-pull module 300 by the short circuit at the power supply end flows to the ground terminal GND through the lower tube unit 302 and the second protection module 200. The second protection module 200 limits the opening of the fourth transistor Q4, thereby maintaining the current flowing from the power supply end to the lower tube unit 302 at about 20mA to protect the entire loop. The current at the input voltage end also flows to the ground terminal GND through the lower tube unit 302.

[0070] like Figure 8 As shown, when the signal output terminal is short-circuited to the ground, the second transistor Q2 is turned off, the lower tube unit 302 is safe, the first transistor Q1 and the third transistor Q3 are turned on, and the current at the input voltage terminal flows through the fourth resistor R4. When the current at the input voltage terminal continues to increase, the emitter voltage of the third transistor Q3 decreases, limiting the opening of the third transistor Q3, maintaining the current at about 15mA or 20mA, and protecting the entire circuit. At this time, the diagnostic voltage acquisition module 400 collects the voltage short-circuited to the ground back to the single-chip microcomputer and reports the fault. The current flows as shown in the figure. Figure 8 As shown, the current at the signal output end is transmitted to the ground end GND through the upper tube unit 301 , and the current at the input voltage end is transmitted to the ground end GND through the first protection module 100 and / or the upper tube unit 301 .

[0071] like Fig. 9 , which is a schematic diagram of simulation results of an embodiment of the present application under normal working conditions, wherein the voltage of the drive signal (output signal) jumps at the same time as the voltage of the input signal.

[0072] like Fig.10As shown, it is a schematic diagram of the simulation results of the embodiment of the present application when short-circuited to the power supply, wherein, due to the short-circuit to the power supply terminal (the power supply terminal voltage is 24V), the voltage of the drive signal (output signal) is the power supply terminal voltage 24V, but the current I (measured from the seventh resistor R7) is always stable below 17.6814mA when the input signal is high level (5V) and low level (0V), and does not exceed 17.685mA even when the input signal changes from 5V to 0V. The voltage of the output signal is always stable at about 24V.

[0073] like Fig.11 As shown, it is a schematic diagram of the simulation results of the embodiment of the present application when short-circuited to ground, wherein no matter whether the input signal is high level or low level, there is no overcurrent, that is, the current I (measured from the fourth resistor R4) is always less than 100mA.

[0074] The first protection module 100 and the second protection module 200 use a low-current overcurrent protection solution that uses a transistor in combination with a current-limiting resistor, which has low cost, good protection effect, and fast response speed. There is an anti-backflow diode (diode D1) at the connection with the signal input terminal in the push-pull module 300, and the pull-down resistor (first resistor R1) can effectively prevent misdriving and improve stability. There is a dead zone protection for the upper and lower bridges in the push-pull module, so that they will not be turned on at the same time, improving stability. The implementation method of the present application is constructed using discrete devices, the circuit is flexible and stable, the cost is low, and it has high economic value for material substitution.

[0075] In a second aspect, according to an embodiment of the present application, an engine is further proposed, comprising: a driving and protection circuit for an intelligent actuator as described in any one of the first aspect.

[0076] In a third aspect, according to an embodiment of the present application, a vehicle is also proposed, comprising: an engine as described in the second aspect.

[0077] In the method of the present application, a push-pull module can be used to generate a PWM drive signal for driving the intelligent actuator through only one input control signal, which has low cost and high stability; short-circuit protection to the ground is achieved through the first protection module, and short-circuit protection to the power supply end is achieved through the second protection module, thereby further improving stability and safety. The implementation method of the present application does not require the use of a driver chip for driving, and has a small area and low cost. Overcurrent protection is achieved by using the saturation region of the transistor, which has low cost, good protection effect and fast response speed. The implementation method of the present application is composed of pure discrete devices and passive devices. In addition to being cheap and reliable, it also has the advantage of good component substitutability. The upper and lower tubes in the push-pull module are turned on and off by cooperating with various transistors, thereby solving the technical problems of driving and protecting the intelligent actuator, and realizing the output and diagnosis of low-voltage PWM drive signals with protection.

[0078] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A driving and protection circuit for an intelligent actuator, characterized in that: include: A push-pull module, a first protection module and a second protection module; One end of the push-pull module is connected to one end of the first protection module, and the other end is connected to one end of the second protection module, and the signal output end is connected to the intelligent actuator; the other end of the first protection module is connected to the input voltage end; the other end of the second protection module is connected to the ground end; The push-pull module is used to pull up or down the driving signal for output according to the input signal; The first protection module is used to reduce the voltage input from the input voltage terminal to the push-pull module when the signal output terminal of the push-pull module is connected to the ground terminal; The second protection module is used to reduce the voltage input from the power supply end to the push-pull module when the output signal output end of the push-pull module is connected to the power supply end.

2. The driving and protection circuit according to claim 1, characterized in that: The push-pull module includes an upper tube unit, a lower tube unit and a protection unit; The signal input end of the upper tube unit is connected to one end of the protection unit, and the signal output end is connected to the signal output end of the lower tube unit; The signal input end of the lower tube unit is connected to the other end of the protection unit; The protection unit is also connected to the ground terminal.

3. The driving and protection circuit according to claim 2, characterized in that: The protection unit comprises: a diode and a first resistor; The anode of the diode is connected to the signal input end and the signal input end of the upper tube unit, and the cathode is connected to one end of the first resistor and the signal input end of the lower tube unit; The other end of the first resistor is connected to the ground end.

4. The driving and protection circuit according to claim 3, characterized in that: The upper tube unit comprises: a first triode and a second resistor; The base of the first triode is connected to one end of the second resistor, the emitter is connected to the signal output end of the lower tube unit, and the collector is connected to one end of the first protection module; The other end of the second resistor is connected to the anode of the diode.

5. The driving and protection circuit according to claim 3, characterized in that: The lower tube unit comprises: a second triode and a third resistor; The emitter of the second triode is connected to the signal output end of the upper tube unit, the collector is connected to one end of the second protection module, and the base is connected to one end of the third resistor; The other end of the third resistor is connected to the cathode of the diode.

6. The driving and protection circuit according to claim 1, characterized in that: The first protection module includes: a third triode, a fourth resistor, a fifth resistor and a sixth resistor; The emitter of the third triode is connected to one end of the fourth resistor, the collector is connected to one end of the push-pull module, and the base is connected to one end of the fifth resistor and one end of the sixth resistor; The other end of the fourth resistor and the other end of the fifth resistor are both connected to the input voltage terminal; The other end of the sixth resistor is connected to the ground end.

7. The driving and protection circuit according to claim 1, characterized in that: The second protection module includes: a fourth transistor, a seventh resistor, an eighth resistor and a ninth resistor; The collector of the fourth transistor is connected to the other end of the push-pull module, the emitter is connected to one end of the seventh resistor, and the base is connected to one end of the eighth resistor and one end of the ninth resistor; The other end of the seventh resistor and the other end of the eighth resistor are both connected to the ground terminal; The other end of the ninth resistor is connected to the input voltage end.

8. The driving and protection circuit according to claim 1, characterized in that: Also included is a diagnostic voltage acquisition module; One end of the diagnosis voltage acquisition module is connected to the output end of the push-pull module, and the other end is connected to the ground end.

9. An engine, characterized in that: include: A driving and protection circuit for an intelligent actuator as claimed in any one of claims 1 to 8.

10. A vehicle, characterized in that: include: The engine as claimed in claim 9.

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