Device and method for correcting zero-position voltage of engine supercharger actuator

Abstract

The present invention relates to a device and method for correcting the zero-position voltage of an engine supercharger actuator, comprising the following steps: S1, installing a supercharger on an engine and connecting a cylinder to the swing arm linkage of the supercharger actuator; S2, in the cold engine state, recording the voltages corresponding to the wastegate valve being pushed to 0% and 100% opening positions; S3, using the cylinder piston to push the swing arm to push the wastegate valve to 0% and 100% opening positions, recording the voltages corresponding to the two positions, and collecting the exhaust temperature before and after the turbine; S4, adjusting the engine speed and torque, increasing the exhaust temperature before the turbine in steps of 100°C, and repeating step S3 at each temperature step; S5, obtaining a voltage correction formula; and importing the voltage correction formula into the control logic of the ECU for correction. The method for correcting the zero-position voltage of an engine supercharger actuator of the present application can avoid performance deficiencies caused by wastegate valve opening control errors.

Description

Technical Field

[0001] The present invention relates to the technical field of internal combustion engines, and in particular to a device and method for correcting the zero-position voltage of an engine supercharger actuator. Background Art

[0002] Turbocharged engines achieve the vehicle's power requirements by controlling the opening of the supercharger bypass valve, also known as the wastegate ("wastegate"), collectively referred to as the bypass valve. The basic principle is: the lower the bypass valve opening, the more exhaust gas pushes the turbine blades (less gas is bypassed), which in turn increases the turbine speed and the coaxial compressor wheel. This allows more air to enter the engine for combustion, resulting in greater power. Currently developed gasoline turbocharged engine bypass valves often use an actuator to control the bypass valve, which swings an arm and controls the bypass valve opening via a linkage mechanism. This actuator uses an actuator voltage signal output by the ECU (central control unit) to adjust the actuator arm's swing angle, thereby controlling the bypass valve's opening via the linkage. During engine startup, the ECU controls the actuator to fully open and close the bypass valve, reading the voltage as the learning value for the zero and fully open positions, respectively.

[0003] When the engine is cold and the ECU is powered on before starting, the voltage learning value learned by the supercharger bypass valve is the learning value at room temperature. After the engine runs for a period of time and the exhaust temperature rises (up to 900°C), the supercharger temperature rises accordingly. Due to thermal expansion, the position of the bypass valve in the supercharger will change, that is, the zero voltage at this time deviates, and the corresponding relationship between the opening of the supercharger exhaust gas bypass valve and the voltage deviates, resulting in the inability to accurately control the opening. If a small low-speed and high-load area is set in the supercharger opening itself, especially the area where 0% opening is used, the deviation will lead to insufficient engine performance. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a method for correcting the zero-position voltage of an engine supercharger actuator to solve the technical problem of insufficient performance caused by the exhaust gas bypass valve opening control error caused by the thermal expansion of the supercharger during heating. Another object of the present invention is to provide a device for correcting the zero-position voltage of an engine supercharger actuator.

[0005] The present invention provides a technical solution for a method for correcting the zero-position voltage of an engine supercharger actuator, comprising the following steps:

[0006] S1, install the supercharger on the engine and connect the cylinder to the swing arm linkage of the supercharger actuator;

[0007] S2: When the engine is cold, use the cylinder piston to push the swing arm to move the wastegate valve to the 0% and 100% opening positions, and record the voltages corresponding to the two positions.

[0008] S3: Start the engine and adjust the engine operating conditions to a turbine exhaust temperature of 400°C. Stabilize for 20 minutes to allow the turbocharger volute temperature to stabilize. Then shut down the engine and simultaneously turn off all cooling devices on the test bench. Use the cylinder piston to push the swing arm to move the wastegate valve to the 0% and 100% opening positions. Record the voltages corresponding to the two positions, and collect the exhaust temperatures before and after the turbine.

[0009] S4, adjusting the engine speed and torque, gradually increasing the exhaust temperature before the turbine in steps of 100°C to the maximum allowable temperature, and repeating step S3 at each temperature step;

[0010] S5, we get:

[0011] 0% voltage correction formula: y=0.0226x+1.4446

[0012] 100% voltage correction formula: y=0.0234x+3.5333

[0013] Wherein, X represents the exhaust temperature before the turbine when the supercharger is working, and y represents the voltage at the 0% position and 100% position corresponding to the exhaust temperature before the turbine.

[0014] S6, import the voltage correction formula in S5 into the control logic of the ECU for correction.

[0015] As a preferred solution, in step S1, the stroke of the piston of the cylinder can cover the maximum and minimum angular positions of the actuator swing arm.

[0016] As a preferred embodiment, in step S2, the piston of the cylinder is connected to a node of a swing arm connecting rod mechanism of the supercharger actuator, and the movement of the cylinder piston can drive the swing arm connecting rod mechanism to swing, so that the maximum position of the swing arm of the swing arm connecting rod mechanism corresponds to 0% of the wastegate valve, and the minimum position corresponds to 100% of the wastegate valve.

[0017] As a preferred solution, in step S3, the cooling devices of the rack that are shut down simultaneously include the fan, the coolant pump, the rack air intake and exhaust fan, and the exhaust fan.

[0018] As a preferred solution, in step S2 and step S3, the tools used to record the voltages corresponding to the two positions are both oscilloscopes connected to the booster actuator.

[0019] As a preferred solution, in step S6, the voltage correction formula is imported into the control logic of the ECU for correction, including:

[0020] A correction function module is added to the control logic of the ECU. That is, according to the pre-turbine exhaust temperature value estimated by the ECU, the 0% and 100% position voltages corresponding to the current pre-turbine exhaust temperature are revised in real time according to the voltage correction formula.

[0021] As a preferred solution, in step S2, cylinder pressure relief valves are provided on both sides of the piston of the cylinder, wherein F is the maximum thrust designed for the supercharger actuator, S is the piston area, and the pressure relief pressure value of the cylinder pressure relief valve is P, then P=FS.

[0022] A device for correcting the zero voltage of an engine supercharger actuator comprises a temperature setting module, an actuator voltage measuring module and a bypass valve opening adjustment module, wherein the temperature setting module, the actuator voltage measuring module and the bypass valve opening adjustment module are all connected to an ECU control electrical signal, and the ECU control is connected to an engine electrical signal;

[0023] The temperature setting module is used to control the temperature rise of the supercharger;

[0024] The actuator voltage measurement module is used to measure the voltage of the supercharger actuator;

[0025] The bypass valve opening adjustment module is used to move the swing arm of the swing arm linkage mechanism of the supercharger actuator to achieve 0% and 100% opening actions;

[0026] The temperature setting module is used to measure the turbine exhaust temperature X when the supercharger is working, and the actuator voltage measurement module is used to measure the voltage y at the 0% position and 100% position corresponding to the turbine exhaust temperature, and the following is obtained:

[0027] 0% voltage correction formula: y=0.0226x+1.4446

[0028] 100% voltage correction formula: y=0.0234x+3.5333;

[0029] The 0% voltage correction formula and the 100% voltage correction formula are introduced into the ECU control logic for correction.

[0030] As a preferred solution, the voltage correction formula is imported into the control logic of the ECU for correction, including: adding a correction function module to the control logic of the ECU, that is, based on the pre-turbine exhaust temperature value estimated by the ECU, the 0% and 100% position voltages corresponding to the current pre-turbine exhaust temperature are revised in real time according to the voltage correction formula.

[0031] As a preferred solution, the temperature setting module is used to control the temperature rise of the supercharger, including: the ECU controls the engine exhaust temperature or controls the temperature of the gas passing through the supercharger on the supercharger unit stand to achieve the heating of the supercharger.

[0032] The actuator voltage measurement module is used to measure the voltage of the supercharger actuator, including: measuring the voltage by connecting an oscilloscope in parallel to the pin of the bypass valve position sensor or by connecting a voltmeter in parallel;

[0033] The bypass valve opening adjustment module is used to move the swing arm of the swing arm linkage mechanism of the supercharger actuator to achieve 0% and 100% opening actions, including: a cylinder is connected to the swing arm linkage mechanism of the supercharger actuator, and compressed air is introduced into the cylinder to achieve movement of the cylinder push rod, thereby driving the swing arm of the supercharger actuator to move.

[0034] Compared with the prior art, the beneficial effects of this application are:

[0035] The method for correcting the zero-position voltage of the engine supercharger actuator of the present application pushes the swing arm by the cylinder piston to push the exhaust bypass valve to the 0% and 100% opening positions, records the voltages corresponding to the two positions, and uses the temperature acquisition system to collect the exhaust temperature after the vortex and the exhaust temperature before the vortex to obtain the 0% voltage correction formula and the 100% voltage correction formula, and imports them into the control logic of the ECU for correction, thereby eliminating the opening error and avoiding performance problems caused by the exhaust bypass valve opening control error. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of a method for correcting the zero-position voltage of an engine supercharger actuator according to the present invention;

[0037] Figure 2 It is a correction diagram of the voltage correction formula;

[0038] Figure 3 This is a schematic diagram of the voltage correction formula obtained through the formula fitting function in the Excel table;

[0039] Figure 4 It is a schematic diagram of a device for correcting the zero-position voltage of an engine supercharger actuator according to the present invention;

[0040] Figure 5 It is a schematic diagram before and after correction;

[0041] Figure 6 is a schematic diagram of an embodiment driven by a stepper motor;

[0042] Figure 7 This is an embodiment of the device for correcting the zero-position voltage of an engine supercharger actuator according to the present invention.

[0043] Among them, 1. Supercharger actuator, 2. Swing arm multi-link mechanism, 3. Oscilloscope, 4. Temperature acquisition system, 5. Thermocouple, 6. Air valve, 7. Compressed air pipe, 8. Cylinder pressure relief valve, 9. Cylinder, 10. Piston, 11. Voltmeter, 12. Stepper motor, 13. Stepper motor driver. DETAILED DESCRIPTION

[0044] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0045] A preferred embodiment of a method for correcting the zero-position voltage of an engine supercharger actuator 1 according to the present invention is as follows: Figures 1 to 5 As shown, the following steps are included: S1, installing a supercharger on the engine, the engine is debugged on the engine bench and can operate under various speed and torque conditions, connecting the cylinder 9 to the swing arm connecting rod mechanism of the supercharger actuator 1, and the stroke of the piston 10 of the cylinder 9 can cover the maximum and minimum angular positions of the actuator swing arm, corresponding to 0% and 100% opening of the wastegate valve.

[0046] The push rod of cylinder 9 has a thrust requirement. Cylinder 9 is equipped with cylinder pressure relief valves 8 on both sides of piston 10. This requirement is achieved by adjusting the pressure of cylinder pressure relief valves 8. Specifically, let F be the maximum design thrust of booster actuator 1, S be the area of ​​piston 10, and the pressure relief value of cylinder pressure relief valve 8 be P. Then, P = FS, and the pressure relief valve pressure value P can be calculated.

[0047] In step S2, with the engine cold, use cylinder 9's piston 10 to push the swing arm to move the wastegate valve to its 0% and 100% open positions, and record the voltages corresponding to these two positions. Specifically, cylinder 9's piston 10 is connected to a node in the swing arm linkage of supercharger actuator 1. Movement of cylinder 9's piston 10 causes the swing arm linkage to swing, such that the maximum position of the swing arm corresponds to 0% of the wastegate valve's opening, and the minimum position corresponds to 100% of the wastegate valve's opening.

[0048] Furthermore, the booster actuator 1 is connected to an oscilloscope 3 , and the voltages corresponding to the two positions are recorded by the oscilloscope 3 .

[0049] S3: Start the engine and adjust the engine operating conditions to a turbine exhaust temperature of 400°C. Stabilize for 20 minutes to stabilize the turbocharger volute temperature. Shut down the engine and simultaneously turn off all cooling devices on the test bench. Use cylinder 9, piston 10 to push the swing arm to move the wastegate valve to the 0% and 100% opening positions. Record the voltages corresponding to the two positions, and collect the exhaust temperatures before and after the turbine.

[0050] Specifically, the cooling devices of the test bench that are shut down at the same time include fans, coolant pumps, test bench air intake and exhaust fans, exhaust fans, etc.

[0051] Furthermore, compressed air pipes 7 are connected to both sides of the piston 10 of the cylinder 9, and air valves 6 are connected to the two compressed air pipes 7. Thermocouples 5 are provided before and after the turbine of the engine. Each thermocouple 5 is electrically connected to the temperature acquisition system 4, and the temperature acquisition system 4 is electrically connected to the ECU; the air valves 6 are controlled to push the exhaust bypass valve to 0% and 100% opening positions respectively, and the voltages corresponding to the two positions are recorded by the oscilloscope 3 respectively, and the temperature values ​​of the thermocouples 5 are collected, which correspond to the exhaust temperature after the turbine and the exhaust temperature before the turbine respectively.

[0052] S4, adjusting the engine speed and torque, gradually increasing the exhaust temperature before the turbine in steps of 100°C to the maximum allowable temperature, and repeating step S3 at each temperature step;

[0053] S5, we get:

[0054] 0% voltage correction formula: y=0.0226x+1.4446;

[0055] 100% voltage correction formula: y=0.0234x+3.5333;

[0056] Wherein, X represents the exhaust temperature before the turbine when the supercharger is working, and y represents the voltage at the 0% position and 100% position corresponding to the exhaust temperature before the turbine.

[0057] Specifically, since the relationship between thermal expansion coefficient and temperature is a linear relationship (according to the textbook, expansion amount = α*L*T, α: expansion coefficient, L: total length of the pipe section, T: maximum temperature; the thermal expansion coefficient formula is α=ΔV / (V*ΔT)), the linear relationship fitting formula is selected as the correction formula, such as Figure 2 Then the linear relationship fitting is completed through the formula fitting function in the Excel table, as shown in Figure 3 As shown above, the linear fitting formula is obtained: 0% voltage correction formula: y=0.0226x+1.4446, 100% voltage correction formula: y=0.0234x+3.5333.

[0058] S6, import the voltage correction formula in S5 into the control logic of the ECU for correction.

[0059] The existing ECU system only detects the 0% and 100% positions of the wastegate valve during shutdown and power-up, learning the corresponding voltages. In subsequent operation, this voltage is used as a reference for the zero and fully open positions to control the bypass valve opening, which can cause errors due to thermal expansion. This application adds a correction function module to the ECU's control logic. Based on the ECU's estimated pre-turbine exhaust temperature, the voltage correction formula is used to adjust the 0% and 100% position voltages corresponding to the current pre-turbine exhaust temperature in real time.

[0060] Specifically, such as Figure 4 As shown, first, the control logic of the supercharger bypass valve is: the target value of the voltage input to the supercharger actuator 1 is derived from the user's demand for engine torque. The deeper the accelerator pedal is pressed, the greater the torque demand, the lower the required opening of the supercharger bypass valve, and the corresponding smaller the voltage value given by the supercharger actuator 1. Figure 5 As shown, the correction formula is introduced: the correction formula is introduced at the voltage requirement of the supercharger actuator 1. The logic description is that after the correction is introduced, the bypass valve opening corresponding to the same supercharger actuator 1 voltage will change. The basis of the correction is the correction formula obtained in step 2. The voltage values ​​at the 0% and 100% opening positions are changed according to the corresponding pre-turbocharger exhaust temperature at this time, thereby Figure 5 The solid line relationship shown in the figure is changed to a dotted line relationship, thereby achieving more accurate control of the opening.

[0061] In other embodiments of the present application, a stepper motor 12 and a driver can be used to replace the cylinder 9 assembly in Example 1. By adjusting the current of the stepper motor 12, the torque control of the stepper motor 12 can be achieved, thereby controlling the force that pushes the actuator swing arm. The thrust limit is calculated by the radius of the gear that engages the drive motor and the actuator push rod, M=FR, M is the torque, and R is the gear radius.

[0062] In addition, the supercharger can be installed on a dedicated single-unit test bench (in the above example, it is installed on the engine). By burning natural gas, the engine exhaust is simulated to drive the supercharger to work and achieve engine turbine housing temperature increase.

[0063] Existing engine supercharger bypass valves complete zero-position learning when the engine is cold. After the engine heats up, thermal expansion of the supercharger causes errors in the control of the wastegate valve's opening. The present invention overcomes these shortcomings. This application, for the first time, implements correction of the bypass valve opening to the pre-turbocharger exhaust temperature within the engine ECU and summarizes a correction formula. Furthermore, the swing arm of the supercharger's electronic actuator is remotely controlled via cylinder 9 or stepper motor 12, and the actuator's allowable thrust is simulated to avoid damage caused by excessive thrust or loose closure caused by insufficient thrust.

[0064] An embodiment of a correction device for the zero-position voltage of an engine supercharger actuator 1, such as Figure 7 As shown, it includes a temperature setting module, an actuator voltage measurement module and a bypass valve opening adjustment module. The temperature setting module, the actuator voltage measurement module and the bypass valve opening adjustment module are all connected to the ECU control electrical signal, and the ECU control is connected to the engine electrical signal; the temperature setting module is used to control the temperature rise of the supercharger; the actuator voltage measurement module is used to measure the voltage of the supercharger actuator 1; the bypass valve opening adjustment module is used to move the swing arm of the swing arm linkage mechanism of the supercharger actuator 1 to achieve 0% and 100% opening action;

[0065] Specifically, the temperature setting module is used to realize supercharger temperature increase, the actuator voltage measurement module is used to test the voltage corresponding to different openings at different temperatures, the bypass valve opening adjustment module is used to realize the actual maximum and minimum openings of the bypass valve, and the pressure correction fits the relationship between the actuator voltage obtained from the test and the actual opening and exhaust temperature into a formula, which is used for the ECU to dynamically correct the zero-position voltage to eliminate the opening error.

[0066] In a specific embodiment of the present application, the temperature setting module is used to measure the turbine exhaust temperature X when the supercharger is working, and the actuator voltage measurement module is used to measure the corresponding 0% position and 100% position voltage y under the turbine exhaust temperature, and the following is obtained:

[0067] 0% voltage correction formula: y=0.0226x+1.4446

[0068] 100% voltage correction formula: y=0.0234x+3.5333;

[0069] Import the 0% voltage correction formula and the 100% voltage correction formula into the ECU control logic for correction.

[0070] In a specific embodiment of the present application, the voltage correction formula is imported into the control logic of the ECU for correction, including: adding a correction function module to the control logic of the ECU, that is, based on the pre-turbulence exhaust temperature value estimated by the ECU, the 0% and 100% position voltages corresponding to the current pre-turbulence exhaust temperature are revised in real time according to the voltage correction formula.

[0071] In the specific implementation of this application, the temperature setting module is used to control the temperature rise of the supercharger, including: the ECU controls the engine exhaust temperature or controls the temperature of the gas passing through the supercharger on the supercharger unit stand to achieve the heating of the supercharger. The supercharger exhaust temperature setting and the heating of the supercharger can also be achieved by other means, collectively referred to as the temperature control setting module.

[0072] The actuator voltage measurement module is used to measure the voltage of the booster actuator 1, including: measuring the voltage by connecting an oscilloscope 3 in parallel to the bypass valve position sensor pin or measuring by connecting a voltmeter 11 in parallel; or measuring by connecting a voltmeter 11 in parallel; measurement can also be achieved by other methods, collectively referred to as voltage measurement modules.

[0073] The bypass valve opening adjustment module is used to move the swing arm of the swing arm connecting rod mechanism of the supercharger actuator 1 to achieve 0% and 100% opening actions, including: connecting the cylinder 9 to the swing arm connecting rod mechanism of the supercharger actuator 1, and moving the cylinder 9 push rod by passing compressed air into the cylinder 9, thereby driving the swing arm movement of the supercharger actuator 1; or it can be achieved by the stepper motor 12; it can also be achieved by other methods, collectively referred to as the bypass valve opening adjustment module.

[0074] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0075] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

[0076] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A method for correcting the zero voltage of an engine supercharger actuator, characterized in that: The following steps are involved: S1, install the supercharger on the engine and connect the cylinder to the swing arm linkage of the supercharger actuator; S2, when the engine is cold, use the cylinder piston to push the swing arm to push the wastegate valve to the 0% and 100% opening positions, and record the voltage corresponding to the two positions; S3: Start the engine and adjust the engine operating conditions to a turbine exhaust temperature of 400°C. Stabilize for 20 minutes to allow the turbocharger volute temperature to stabilize. Then shut down the engine and simultaneously turn off all cooling devices on the test bench. Use the cylinder piston to push the swing arm to move the wastegate valve to the 0% and 100% opening positions. Record the voltages corresponding to the two positions, and collect the exhaust temperatures before and after the turbine. S4, adjusting the engine speed and torque, gradually increasing the exhaust temperature before the turbine in steps of 100°C to the maximum allowable temperature, and repeating step S3 at each temperature step; S5, we get: 0% voltage correction formula: y = 0.0226x + 1.4446; 100% voltage correction formula: y = 0.0234x + 3.5333; Wherein, x represents the turbine exhaust temperature when the supercharger is working, and y represents the voltage at the 0% position and 100% position corresponding to the turbine exhaust temperature; S6, import the voltage correction formula in S5 into the control logic of the ECU for correction.

2. The method for correcting the zero-position voltage of an engine supercharger actuator according to claim 1, characterized in that: In step S1 , the stroke of the piston of the cylinder can cover the maximum and minimum angular positions of the actuator swing arm.

3. The method for correcting the zero-position voltage of an engine supercharger actuator according to claim 1, characterized in that: In step S2, the piston of the cylinder is connected to a node of a swing arm connecting rod mechanism of the supercharger actuator. The movement of the cylinder piston can drive the swing arm connecting rod mechanism to swing, so that the maximum position of the swing arm of the swing arm connecting rod mechanism corresponds to 0% of the wastegate valve and the minimum position corresponds to 100% of the wastegate valve.

4. The method for correcting the zero-position voltage of an engine supercharger actuator according to claim 1, characterized in that: In step S3, the cooling devices of the rack that are shut down simultaneously include the fan, the coolant pump, the rack air intake and exhaust fan, and the exhaust fan.

5. The method for correcting the zero-position voltage of an engine supercharger actuator according to claim 1, characterized in that: In step S2 and step S3, the tools used to record the voltages corresponding to the two positions are both oscilloscopes connected to the booster actuator.

6. The method for correcting the zero-position voltage of an engine supercharger actuator according to claim 1, characterized in that: In step S6, the voltage correction formula is imported into the control logic of the ECU for correction, including: A correction function module is added to the control logic of the ECU. That is, according to the pre-turbine exhaust temperature value estimated by the ECU, the 0% and 100% position voltages corresponding to the current pre-turbine exhaust temperature are revised in real time according to the voltage correction formula.

7. The method for correcting the zero-position voltage of an engine supercharger actuator according to claim 1, characterized in that: In step S2, cylinder pressure relief valves are provided on both sides of the piston of the cylinder, wherein, assuming F is the maximum thrust designed for the supercharger actuator, S is the piston area, and the pressure relief value of the cylinder pressure relief valve is P, then P=FS.

8. A device for correcting the zero voltage of an engine supercharger actuator, characterized by: It includes a temperature setting module, an actuator voltage measurement module and a bypass valve opening adjustment module, wherein the temperature setting module, the actuator voltage measurement module and the bypass valve opening adjustment module are all connected to the ECU control electrical signal, and the ECU control is connected to the engine electrical signal; The temperature setting module is used to control the temperature rise of the supercharger; The actuator voltage measurement module is used to measure the voltage of the supercharger actuator; The bypass valve opening adjustment module is used to move the swing arm of the swing arm linkage mechanism of the supercharger actuator to achieve 0% and 100% opening actions; The temperature setting module is used to measure the turbine exhaust temperature x when the supercharger is working, and the actuator voltage measurement module is used to measure the corresponding 0% position and 100% position voltage y under the turbine exhaust temperature, and the following is obtained: 0% voltage correction formula: y = 0.0226x + 1.4446 100% voltage correction formula: y = 0.0234x + 3.5333; The 0% voltage correction formula and the 100% voltage correction formula are introduced into the ECU control logic for correction.

9. The engine supercharger actuator zero voltage correction device according to claim 8, characterized in that: Importing the voltage correction formula into the control logic of the ECU for correction includes: adding a correction function module to the control logic of the ECU, that is, based on the pre-turbulence exhaust temperature value estimated by the ECU, revising the 0% and 100% position voltages corresponding to the current pre-turbulence exhaust temperature in real time according to the voltage correction formula.

10. The engine supercharger actuator zero voltage correction device according to claim 8, characterized in that: The temperature setting module is used to control the temperature rise of the supercharger, including: the ECU controls the engine exhaust temperature or controls the temperature of the gas passing through the supercharger on the supercharger single test bench to achieve the heating of the supercharger; The actuator voltage measurement module is used to measure the voltage of the supercharger actuator, including: measuring the voltage by connecting an oscilloscope in parallel to the pin of the bypass valve position sensor or by connecting a voltmeter in parallel; The bypass valve opening adjustment module is used to move the swing arm of the swing arm connecting rod mechanism of the supercharger actuator to achieve 0% and 100% opening actions, including: a cylinder is connected to the swing arm connecting rod mechanism of the supercharger actuator, and compressed air is introduced into the cylinder to achieve the movement of the cylinder push rod, thereby driving the swing arm of the supercharger actuator to move.

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