Surge valve, surge valve control method and related device

Abstract

The invention discloses a surge valve, a surge valve control method and a related device, and relates to the field of surge valves.The surge valve comprises a surge valve shell, an electric control valve body, an electromagnetic coil and a spring valve plate, the electric control valve body is arranged in a cavity in the lower portion of the surge valve shell, and the bottom face of the electric control valve body and the surge valve shell are in linear sealing; the electromagnetic coil is installed in a cavity in the top of the surge valve shell and drives the electric control valve body to move axially through electromagnetic force, the spring valve plate is arranged in the side face air outlet, the electromagnetic coil drives the electric control valve body to move upwards according to a valve opening signal, and the bottom air inlet is opened to enable air to enter. The spring valve plate automatically adjusts the opening angle according to the pressure difference and dynamically adjusts the gas flow flowing out of the side face gas outlet. The spring valve plate responds to the pressure difference change to achieve self-adaptive opening adjustment, so that the gas flow and the pressure difference form a matching relation, the stability of gas flow of the side face gas outlet is improved, and engine output torque fluctuation and abnormal pressure relief noise caused by sudden change of the gas flow are effectively restrained.

Description

Technical Field

[0001] This invention relates to the field of surge valve technology, and more specifically, to a surge valve, a surge valve control method, and related devices. Background Technology

[0002] When the engine is operating under reduced load, if the electronic throttle suddenly closes, a sudden increase in the pressure before the throttle (i.e., boost pressure) and a sudden decrease in intake airflow will occur, leading to turbocharger surge. At this time, the boost pressure is unstable and airflow noise is generated. To solve this problem, a surge valve is typically installed on natural gas engines. When the throttle suddenly closes, opening the surge valve can prevent a sudden increase in pressure before the throttle and a sudden decrease in intake airflow, thus effectively preventing turbocharger surge.

[0003] However, at the moment the surge valve opens, the sudden change in pressure difference on both sides of the valve plate will cause a sudden change in gas flow, which will induce leakage noise and cause a sudden change in engine output torque, ultimately causing the vehicle to jerk. Summary of the Invention

[0004] In view of this, the present invention discloses a surge valve, a surge valve control method and related devices to solve the problems of engine output torque fluctuation and abnormal pressure relief noise caused by sudden changes in gas flow.

[0005] A surge valve includes: a surge valve housing, an electrically controlled valve body, a solenoid coil, and a spring valve plate; The electrically controlled valve body is disposed in the cavity at the lower part of the surge valve housing. The bottom surface of the electrically controlled valve body and the inner cavity sealing surface of the surge valve housing form a line sealing structure. The opening and closing of the bottom air inlet is controlled by axial movement. The electromagnetic coil is installed in the cavity at the top of the surge valve housing, and drives the electronically controlled valve body to move axially through electromagnetic force; The side air outlet is located on the side of the surge valve housing and near the moving position of the electronically controlled valve body. The spring valve plate is provided inside the side air outlet. The electromagnetic coil drives the electronically controlled valve body to move upward according to the valve opening signal sent by the engine controller, opening the bottom air inlet to allow gas to enter the chamber of the surge valve housing, creating a pressure difference on both sides of the spring valve plate, and the spring valve plate automatically adjusts the opening angle according to the pressure difference to dynamically regulate the gas flow rate from the side air outlet.

[0006] Optionally, it may also include: a valve body spring; The valve body spring is sleeved on the outer wall of the electrically controlled valve body and installed in the annular gap between the electrically controlled valve body and the inner cavity of the surge valve housing, providing axial preload to the electrically controlled valve body and ensuring that the electrically controlled valve body completely seals the bottom air inlet when not in operation.

[0007] Optionally, the spring valve plate includes: a mechanical valve plate and a valve plate spring; The mechanical valve plate forms a rotating pair with the surge valve housing via a hinge shaft. The valve plate spring is sleeved on the hinge shaft in the form of a torsion spring. One end of the valve plate spring is fixed to the surge valve housing, and the other end is pressed into the spring seat on the back of the mechanical valve plate, so that the mechanical valve plate can rotate around the hinge shaft and automatically adjust the opening angle according to the pressure difference on both sides of the valve plate.

[0008] A surge valve control method is applied to an engine controller, wherein the engine controller is connected to the electromagnetic coil in the surge valve described above, and the surge valve control method includes: Obtain the engine operating parameters at the current moment; Based on the engine operating parameters, it can be identified whether the turbocharger is in a surge condition; If the booster is determined to be in a surge condition, a valve opening signal is generated; The valve opening signal is sent to the electromagnetic coil, which drives the electronically controlled valve body to move upward according to the valve opening signal, opening the bottom air inlet to allow gas to enter the cavity of the surge valve housing, creating a pressure difference on both sides of the spring valve plate, and causing the spring valve plate to automatically adjust the opening angle according to the pressure difference, dynamically regulating the gas flow rate from the side air outlet.

[0009] Optionally, obtaining the engine operating parameters at the current moment includes: Obtain the current throttle opening, throttle inlet pressure, engine speed, and throttle outlet pressure.

[0010] Optionally, identifying whether the turbocharger is in surge condition based on the engine operating parameters includes: Based on the throttle opening at the current moment, calculate the rate of change of the throttle opening at the current moment relative to the previous moment, and calculate the pressure difference before and after the throttle based on the pressure before and after the throttle. When the rate of change of the throttle opening is less than the rate of change limit, the pressure in front of the throttle is greater than the pressure limit, the engine speed is within the preset speed range, and the pressure difference across the throttle is less than the pressure difference limit, the turbocharger is determined to be in surge condition.

[0011] Optionally, generating a valve opening signal when it is determined that the booster is in a surge condition includes: Calculate the target pressure ratio between the throttle inlet pressure and the current ambient atmospheric pressure; The target offset compensation value corresponding to the target pressure ratio is determined from the preset correspondence between pressure ratio and offset compensation value; The reference throttle opening threshold is offset and compensated according to the target offset compensation value to obtain the target throttle opening threshold; When the throttle opening is not greater than the target throttle opening threshold, the current time is set as the valve opening time, and a corresponding valve opening signal is generated.

[0012] A surge valve control device is applied to an engine controller, the engine controller being connected to the solenoid coil in the surge valve described above, the surge valve control device comprising: The parameter acquisition unit is used to acquire the engine operating parameters at the current moment. The surge condition identification unit is used to identify whether the turbocharger is in a surge condition based on the engine operating parameters. The signal generation unit is used to generate a valve opening signal when it is determined that the booster is in a surge condition; The signal transmitting unit is used to send the valve opening signal to the electromagnetic coil, so that the electromagnetic coil drives the electronically controlled valve body to move upward according to the valve opening signal, opening the bottom air inlet to allow gas to enter the cavity of the surge valve housing, so that a pressure difference is formed on both sides of the spring valve plate, and the spring valve plate automatically adjusts the opening angle according to the pressure difference, dynamically regulating the gas flow rate from the side air outlet.

[0013] An engine controller includes: a memory and a processor; The memory is used to store at least one instruction; The processor is used to execute the at least one instruction to implement any surge valve control method.

[0014] An engine includes: the surge valve described above, and the engine controller described above; The engine controller is connected to the solenoid coil in the surge valve.

[0015] As can be seen from the above technical solution, the present invention discloses a surge valve, a surge valve control method, and related devices. The surge valve includes a surge valve housing, an electrically controlled valve body, an electromagnetic coil, and a spring valve plate. The electrically controlled valve body is disposed in the lower cavity of the surge valve housing. The bottom surface of the electrically controlled valve body and the inner cavity sealing surface of the surge valve housing form a line seal structure. The opening and closing of the bottom air inlet is controlled by axial movement. The electromagnetic coil is installed in the cavity at the top of the surge valve housing. The electromagnetic force drives the electrically controlled valve body to move axially. The side air outlet is located on the side of the surge valve housing and close to the position where the electrically controlled valve body moves. A spring valve plate is disposed inside the side air outlet. The electromagnetic coil drives the electrically controlled valve body to move upward according to the valve opening signal sent by the engine controller, opening the bottom air inlet to allow gas to enter the cavity of the surge valve housing, so that a pressure difference is formed on both sides of the spring valve plate. The spring valve plate automatically adjusts the opening angle according to the pressure difference to dynamically regulate the gas flow rate from the side air outlet. This invention adds a spring valve to the side air outlet. The spring valve responds to changes in pressure difference to achieve adaptive opening adjustment, creating a dynamic matching relationship between gas flow and pressure difference. This continuous flow regulation mechanism, while driving the surge valve to open gradually, improves the stability and uniformity of airflow at the side air outlet, effectively suppressing engine output torque fluctuations and abnormal pressure relief noise caused by sudden changes in gas flow, thereby ensuring the smooth operation of the vehicle's power system. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the published drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the surge valve in the existing design; Figure 2 This is a schematic diagram of the structure of a surge valve disclosed in an embodiment of the present invention; Figure 3 This is a flowchart of a surge valve control method disclosed in an embodiment of the present invention; Figure 4 This is a flowchart of a surge valve control method disclosed in a specific embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a surge valve control device disclosed in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of an engine controller disclosed in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of an engine disclosed in an embodiment of the present invention. Detailed Implementation

[0018] Surge valve: This refers to the valve in a natural gas engine that controls the return of boosted air to the compressor when the electronic throttle valve suddenly closes. Surge valves can be mechanically or electronically controlled. This application primarily focuses on improvements to electronically controlled surge valves.

[0019] See Figure 1 The existing surge valve diagram shows that when the valve plate of the surge valve opens, airflow flows from... Figure 1 Enter from the position indicated by the arrow on the lower side of the surge valve, from Figure 1 The airflow flows out at the location indicated by the arrow on the left side of the surge valve. At the moment the surge valve opens, due to the significant pressure difference on both sides of the valve plate, the transient release of high-pressure airflow will generate obvious release noise. At the same time, the sudden change in intake flow will cause a violent fluctuation in the engine output torque. This torque disturbance is transmitted through the transmission system, ultimately causing the vehicle to jerk.

[0020] To address the aforementioned problems with existing surge valves, this application improves the valve structure to create a dynamic matching relationship between the valve opening and the gas flow rate. Simultaneously, it integrates a closed-loop electronic control strategy, which can optimize control parameters in real time based on engine operating conditions. This effectively suppresses engine output torque fluctuations and abnormal pressure relief noise caused by sudden changes in gas flow rate, ensuring the smooth operation of the vehicle's powertrain.

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] See Figure 2 The present invention discloses a surge valve structure diagram, the surge valve includes: surge valve housing 10, electrically controlled valve body 20, electromagnetic coil 30 and spring valve plate 40.

[0023] Specifically, the surge valve housing 10 serves as the base of the entire surge valve and has a chamber inside.

[0024] The electrically controlled valve body 20 is located in the lower cavity of the surge valve housing 10. The bottom surface of the electrically controlled valve body 20 and the inner cavity sealing surface of the surge valve housing 10 form a line sealing structure. The opening and closing of the bottom air inlet 01 is controlled by axial movement.

[0025] Specifically, when the solenoid valve body 20 does not move upward, the line seal structure formed by the bottom surface of the solenoid valve body 20 and the inner cavity sealing surface of the surge valve housing 10 can block gas from entering the cavity of the surge valve housing 10 from the bottom air inlet 01; when the solenoid valve body 20 moves upward, the bottom air inlet 01 opens, allowing gas to enter the cavity of the surge valve housing 10 from the bottom air inlet 01.

[0026] The electromagnetic coil 30 is installed in the cavity at the top of the surge valve housing 10 and drives the electronically controlled valve body 20 to move axially through electromagnetic force.

[0027] In practical applications, the electromagnetic coil 30 can be installed in the cavity at the top of the surge valve housing 10 by bolts or clips. The iron core inside the electromagnetic coil 30 acts directly on the top of the electronically controlled valve body 20 through a push rod or magnetic force. The leads of the electromagnetic coil 30 are connected to the engine controller and can receive control signals sent by the engine controller, which can be valve opening signals or valve closing signals.

[0028] When the solenoid coil 30 receives a valve opening signal from the engine controller, it generates a magnetic field that overcomes the spring force and drives the electronically controlled valve body 20 to move upward. At this time, the line seal between the bottom surface of the electronically controlled valve body 20 and the surge valve housing 10 is opened. When the solenoid coil 30 receives a valve closing signal from the engine controller, the electromagnetic force of the solenoid coil 30 disappears, and the electronically controlled valve body 20 is pressed against the sealing surface of the surge valve housing 10 by the return spring. At this time, the line seal between the bottom surface of the electronically controlled valve body 20 and the surge valve housing 10 is closed.

[0029] The side outlet 02 of the surge valve is located on the side of the surge valve housing 10 and near the moving position of the electrically controlled valve body 20. A spring valve plate 40 is installed inside the side outlet 02. The spring valve plate 40, as... Figure 2 As shown in the dashed box.

[0030] In practical applications, the spring valve plate 40 is embedded in the air outlet on the side of the surge valve housing and can be fixed by a connecting rod, hinge, or elastic bracket. The spring valve plate 40 can rotate around the hinge, and the opening angle is determined by the pressure difference formed on both sides of the spring valve plate 40.

[0031] When the pressure difference is large, the gas impact force overcomes the spring force, and the opening angle of the spring valve plate 40 gradually increases, so that the gas flow rate from the side outlet 02 gradually increases from small to large within a preset time period (e.g., 1 second), thereby achieving the purpose of continuous change of gas flow rate while the surge valve opens, effectively avoiding torque change and leakage noise caused by sudden change in gas flow rate.

[0032] When the pressure difference is small, the opening angle of the spring valve plate 40 gradually decreases, thus reducing the gas flow rate from the side outlet 02. Therefore, the spring valve plate 40 achieves continuous regulation of the gas flow rate as the pressure difference changes.

[0033] The working principle of the surge valve is as follows: The electromagnetic coil 30 drives the electronically controlled valve body 20 to move upward according to the valve opening signal sent by the engine controller, opening the bottom air inlet 01 and allowing gas to enter the chamber of the surge valve housing 10, so that a pressure difference is formed on both sides of the spring valve plate 40, and the spring valve plate 40 automatically adjusts the opening angle according to the pressure difference to dynamically regulate the gas flow rate from the side air outlet 02.

[0034] Specifically, when the electromagnetic coil 30 receives the valve opening signal sent by the engine controller, the electromagnetic coil 30 generates a magnetic field, which overcomes the spring force and drives the electronically controlled valve body 20 to move upward. At this time, the line seal between the bottom surface of the electronically controlled valve body 20 and the surge valve housing 10 is opened, the bottom air inlet 01 is opened, and the gas passes through the cavity of the surge valve housing 10 through the bottom air inlet 01, which creates a pressure difference on both sides of the spring valve plate 40. When the pressure difference is large, the gas impact force overcomes the spring force, and the opening angle of the spring valve plate 40 gradually increases. The gas flow rate from the side air outlet 02 gradually increases from small to large, ensuring a smooth transition of the airflow channel, thereby effectively suppressing the engine output torque fluctuation and abnormal pressure relief noise caused by sudden changes in gas flow.

[0035] In summary, this invention discloses a surge valve, including a surge valve housing 10, an electrically controlled valve body 20, an electromagnetic coil 30, and a spring valve plate 40. The electrically controlled valve body 20 is disposed in the lower cavity of the surge valve housing 10, and the bottom surface of the electrically controlled valve body 20 forms a line seal structure with the inner cavity sealing surface of the surge valve housing 10. The opening and closing of the bottom air inlet 01 is controlled by axial movement. The electromagnetic coil 30 is installed in the top cavity of the surge valve housing 10, and drives the electrically controlled valve body 20 to move axially by electromagnetic force, thereby opening the side air outlet. The air outlet 02 is located on the side of the surge valve housing 10 and near the moving position of the electronically controlled valve body 20. A spring valve plate 40 is installed inside the side air outlet 02. The electromagnetic coil 30 drives the electronically controlled valve body 20 upwards according to the valve opening signal sent by the engine controller, opening the bottom air inlet 01 and allowing gas to enter the cavity of the surge valve housing 10. This creates a pressure difference on both sides of the spring valve plate 40, causing the spring valve plate 40 to automatically adjust its opening angle according to the pressure difference, dynamically regulating the gas flow rate from the side air outlet 02. This invention adds a spring valve plate to the side air outlet, achieving adaptive opening adjustment through the spring valve plate's response to pressure difference changes, thus creating a dynamic matching relationship between gas flow rate and pressure difference. This continuous flow regulation mechanism, while driving the surge valve to open gradually, improves the stability and uniformity of the airflow at the side air outlet, effectively suppressing engine output torque fluctuations and abnormal pressure relief noise caused by sudden changes in gas flow rate, thereby ensuring the smooth operation of the vehicle's power system.

[0036] In one embodiment, in Figure 2 Based on the embodiment shown, the surge valve may further include a valve body spring ( Figure 2 (Not shown in the image).

[0037] The valve body spring is sleeved on the outer wall of the electronically controlled valve body 20 and installed in the annular gap between the electronically controlled valve body 20 and the inner cavity of the surge valve housing 10, providing axial preload to the electronically controlled valve body 20 and ensuring that the electronically controlled valve body 20 completely seals the bottom air inlet 01 when not in operation.

[0038] In practical applications, the valve body spring can be a cylindrical helical compression spring, which is sleeved on the outer wall of the electrically controlled valve body 20.

[0039] When the electronically controlled valve body 20 is not in operation, the electromagnetic coil 30 is de-energized, and the valve body spring presses the electronically controlled valve body 20 against the sealing surface of the bottom air inlet 01 through axial preload, thereby completely sealing the bottom air inlet 01.

[0040] In one embodiment, such as Figure 2 As shown, the spring valve plate 40 includes: a mechanical valve plate 41 and a valve plate spring 42.

[0041] The mechanical valve plate 41 forms a rotating pair with the surge valve housing 10 through a hinge shaft. The valve plate spring 42 is sleeved on the hinge shaft in the form of a torsion spring. One end of the valve plate spring 42 is fixed to the surge valve housing 10, and the other end is pressed into the spring seat on the back of the mechanical valve plate 41, so that the mechanical valve plate 41 can rotate around the hinge shaft and automatically adjust the opening angle according to the pressure difference on both sides of the valve plate.

[0042] In practical applications, the mechanical valve plate 41 can be made of thin-walled metal (such as stainless steel) by stamping, and the surface is streamlined to reduce aerodynamic resistance.

[0043] The valve spring 42 can be made of high-elasticity alloy wire, with its mean diameter matching that of the hinge shaft.

[0044] This application achieves continuous adjustment of gas flow rate with pressure difference by balancing the rotational motion of mechanical valve plate 41 with the torque of valve plate spring 42, while ensuring the reliability of sealing and response speed, meeting the stringent performance requirements of automotive turbocharger systems for surge valves.

[0045] Based on the above discussion, it can be seen that the surge valve performs opening and closing operations according to the control signal sent by the engine controller. This control signal can be a valve opening signal or a valve closing signal.

[0046] based on Figure 2 The surge valve structure shown in the figure is further disclosed in this application, which provides a closed-loop dynamic control method for optimizing the surge valve. The technical implementation process and principle are explained below: See Figure 3The present invention discloses a flowchart of a surge valve control method. This method is applied to an engine controller, which is connected to an electromagnetic coil in the surge valve. The surge valve control method includes: Step S101: Obtain the engine operating parameters at the current moment.

[0047] Engine operating parameters include, but are not limited to, throttle opening, throttle inlet pressure, engine speed, and throttle outlet pressure.

[0048] Step S102: Identify whether the turbocharger is in surge condition based on the engine operating parameters.

[0049] In practical applications, the turbocharger can be judged to be in a surge condition based on the throttle opening change rate, throttle front pressure, engine speed, and pressure difference across the throttle.

[0050] Specifically, (1) based on the throttle opening at the current moment, calculate the rate of change of the throttle opening at the current moment relative to the previous moment, and calculate the pressure difference before and after the throttle based on the pressure before and after the throttle.

[0051] The formula for calculating the throttle opening change rate is as follows: Throttle opening change rate = (throttle opening at time t2 - throttle opening at time t1) / (t2 - t1); The current time is represented by time t2, and the time before the current time is represented by time t1.

[0052] The formula for calculating the pressure difference Δb before and after the throttle body is as follows: △b=bd; In the formula, b represents the pressure before the throttle valve, and d represents the pressure after the throttle valve.

[0053] (2) When the rate of change of the throttle opening is less than the rate of change limit, the pressure in front of the throttle is greater than the pressure limit, the engine speed is within the preset speed range, and the pressure difference across the throttle is less than the pressure difference limit, the turbocharger is determined to be in surge condition.

[0054] The values ​​of the change rate limit a0, pressure limit b0, preset speed range (c0, c1), and differential pressure limit Δb0 are determined according to actual needs, and are not limited in this invention.

[0055] Step S103: If it is determined that the booster is in a surge condition, a valve opening signal is generated.

[0056] Step S104: Send the valve opening signal to the electromagnetic coil, so that the electromagnetic coil drives the electronically controlled valve body to move upward according to the valve opening signal, opening the bottom air inlet to allow gas to enter the cavity of the surge valve housing, so that a pressure difference is formed on both sides of the spring valve plate, and the spring valve plate automatically adjusts the opening angle according to the pressure difference, dynamically regulating the gas flow rate from the side air outlet.

[0057] When the engine controller determines that the turbocharger is in surge condition based on the engine operating parameters, this application immediately generates a valve opening signal. This signal is sent to the solenoid coil of the surge valve, causing the solenoid coil to generate a magnetic field that overcomes the spring force and drives the electronically controlled valve body to move upward. At this time, the line seal between the bottom surface of the electronically controlled valve body and the surge valve housing opens, and the bottom air inlet opens. Gas flows through the chamber of the surge valve housing through the bottom air inlet, creating a pressure difference on both sides of the spring valve plate. When the pressure difference is large, the gas impact force overcomes the spring force, and the opening angle of the spring valve plate gradually increases. The gas flow rate from the side outlet gradually increases from small to large, ensuring a smooth transition in the airflow channel. This effectively suppresses engine output torque fluctuations and abnormal pressure relief noise caused by sudden changes in gas flow.

[0058] In summary, this invention discloses a surge valve control method. The engine controller acquires the engine operating parameters at the current moment and identifies whether the turbocharger is in a surge condition based on the engine operating parameters. If the turbocharger is determined to be in a surge condition, a valve opening signal is generated and sent to the electromagnetic coil. The electromagnetic coil drives the electronically controlled valve body to move upward according to the valve opening signal, opening the bottom air inlet to allow gas to enter the chamber of the surge valve housing. This creates a pressure difference on both sides of the spring valve plate, causing the spring valve plate to automatically adjust the opening angle according to the pressure difference, and dynamically regulate the gas flow rate from the side outlet.

[0059] This invention adds a spring valve to the side air outlet. The spring valve responds to changes in pressure difference to achieve adaptive opening adjustment, creating a dynamic matching relationship between gas flow and pressure difference. This continuous flow regulation mechanism, while driving the surge valve to open gradually, improves the stability and uniformity of airflow at the side air outlet, effectively suppressing engine output torque fluctuations and abnormal pressure relief noise caused by sudden changes in gas flow, thereby ensuring the smooth operation of the vehicle's power system.

[0060] In one embodiment, step S103 may specifically include: (1) Calculate the target pressure ratio between the pressure before the throttle valve and the current ambient atmospheric pressure.

[0061] The formula for calculating the pressure ratio r is as follows: r = b / e; b represents the throttle body pressure signal, and e represents atmospheric pressure.

[0062] This application sets the ratio of the throttle inlet pressure collected at the current moment to the current ambient atmospheric pressure as the target pressure ratio.

[0063] (2) Determine the target offset compensation value corresponding to the target pressure ratio from the pre-set correspondence between the pressure ratio and the offset compensation value.

[0064] The relationship between the pressure ratio and the offset compensation value can be determined through bench calibration tests.

[0065] The target pressure ratio is compared with each pressure ratio in the corresponding relationship, and the offset compensation value of the matching item is determined as the target offset compensation value.

[0066] (3) The reference throttle opening threshold is offset compensated according to the target offset compensation value to obtain the target throttle opening threshold.

[0067] Offset compensation refers to compensation for the reference throttle opening threshold that serves as the valve opening moment. For example, if the reference throttle opening threshold is 20%, the target offset compensation value corresponding to a pressure ratio of 2.0 is 5%, and the corresponding target throttle opening threshold is 25%.

[0068] This application introduces a target offset compensation value based on real-time pressure ratio calculation to dynamically correct the reference throttle opening threshold, thereby achieving precise control of the opening time of the electronically controlled valve body.

[0069] (4) When the throttle opening is not greater than the target throttle opening threshold, the current time is set as the valve opening time, and a corresponding valve opening signal is generated.

[0070] Under rapid deceleration conditions (such as when the throttle opening suddenly drops from 100% full throttle to 10% idle speed), the control system uses the throttle opening as the core parameter to dynamically determine the valve opening time of the surge valve.

[0071] See Figure 4 The present invention discloses a flowchart of a surge valve control method in a specific embodiment. This method is applied to an engine controller, and the specific process is as follows: (1) The input parameters of the engine controller include: valve opening signal a, throttle pressure signal b, engine speed signal c, throttle pressure signal d, and atmospheric pressure e.

[0072] (2) When it is necessary to identify surge condition A, the surge condition is specifically identified based on valve opening signal a, throttle pressure signal b, engine speed signal c, and throttle pressure signal d.

[0073] Specifically: Calculate the throttle opening change rate. When the throttle opening change rate is less than the change rate limit a0, the pressure signal b before the throttle is greater than the limit b0, and the engine speed is within a certain range (c0, c1), calculate the pressure difference Δb=bd before and after the throttle. When Δb is less than the pressure difference limit Δb0, it is determined that the turbocharger is in a surge condition, and the pressure ratio r=b / e is calculated.

[0074] (3) Valve opening time control: Based on the pressure ratio r=b / e, the target offset compensation value corresponding to the current pressure ratio is determined from the pre-set correspondence between the pressure ratio and the offset compensation value. The reference throttle opening threshold is offset compensated according to the target offset compensation value to obtain the target throttle opening threshold. When the throttle opening is not greater than the target throttle opening threshold, the current time is set as the valve opening time, and the corresponding valve opening signal is generated.

[0075] Corresponding to the above method embodiments, the present invention also discloses a surge valve control device.

[0076] See Figure 5 The present invention discloses a schematic diagram of a surge valve control device, which is applied to an engine controller. The engine controller is connected to... Figure 2 The surge valve shown has an electromagnetic coil connection, and the surge valve control device includes: The parameter acquisition unit 201 is used to acquire the engine operating parameters at the current moment.

[0077] Engine operating parameters include, but are not limited to, throttle opening, throttle inlet pressure, engine speed, and throttle outlet pressure.

[0078] The surge condition identification unit 202 is used to identify whether the turbocharger is in a surge condition based on the engine operating parameters.

[0079] The surge condition identification unit 202 can be specifically used for: Based on the throttle opening at the current moment, calculate the rate of change of the throttle opening at the current moment relative to the previous moment, and calculate the pressure difference before and after the throttle based on the pressure before and after the throttle. When the rate of change of the throttle opening is less than the rate of change limit, the pressure in front of the throttle is greater than the pressure limit, the engine speed is within the preset speed range, and the pressure difference across the throttle is less than the pressure difference limit, the turbocharger is determined to be in surge condition.

[0080] The signal generation unit 203 is used to generate a valve opening signal when it is determined that the booster is in a surge condition.

[0081] The signal transmitting unit 204 is used to send the valve opening signal to the electromagnetic coil, so that the electromagnetic coil drives the electronically controlled valve body to move upward according to the valve opening signal, opening the bottom air inlet to allow gas to enter the cavity of the surge valve housing, so that a pressure difference is formed on both sides of the spring valve plate, and the spring valve plate automatically adjusts the opening angle according to the pressure difference, dynamically regulating the gas flow rate from the side air outlet.

[0082] When the engine controller determines that the turbocharger is in surge condition based on the engine operating parameters, this application immediately generates a valve opening signal. This signal is sent to the solenoid coil of the surge valve, causing the solenoid coil to generate a magnetic field that overcomes the spring force and drives the electronically controlled valve body to move upward. At this time, the line seal between the bottom surface of the electronically controlled valve body and the surge valve housing opens, and the bottom air inlet opens. Gas flows through the chamber of the surge valve housing through the bottom air inlet, creating a pressure difference on both sides of the spring valve plate. When the pressure difference is large, the gas impact force overcomes the spring force, and the opening angle of the spring valve plate gradually increases. The gas flow rate from the side outlet gradually increases from small to large, ensuring a smooth transition in the airflow channel. This effectively suppresses engine output torque fluctuations and abnormal pressure relief noise caused by sudden changes in gas flow.

[0083] In summary, this invention discloses a surge valve control device. The engine controller acquires the engine operating parameters at the current moment and identifies whether the turbocharger is in a surge condition based on the engine operating parameters. When it is determined that the turbocharger is in a surge condition, a valve opening signal is generated and sent to the electromagnetic coil. The electromagnetic coil drives the electronically controlled valve body to move upward according to the valve opening signal, opening the bottom air inlet to allow gas to enter the chamber of the surge valve housing. This creates a pressure difference on both sides of the spring valve plate, causing the spring valve plate to automatically adjust the opening angle according to the pressure difference, and dynamically regulate the gas flow rate from the side outlet.

[0084] This invention adds a spring valve to the side air outlet. The spring valve responds to changes in pressure difference to achieve adaptive opening adjustment, creating a dynamic matching relationship between gas flow and pressure difference. This continuous flow regulation mechanism, while driving the surge valve to open gradually, improves the stability and uniformity of airflow at the side air outlet, effectively suppressing engine output torque fluctuations and abnormal pressure relief noise caused by sudden changes in gas flow, thereby ensuring the smooth operation of the vehicle's power system.

[0085] In one embodiment, the signal generation unit 203 can specifically be used for: Calculate the target pressure ratio between the throttle inlet pressure and the current ambient atmospheric pressure; The target offset compensation value corresponding to the target pressure ratio is determined from the preset correspondence between pressure ratio and offset compensation value; The reference throttle opening threshold is offset and compensated according to the target offset compensation value to obtain the target throttle opening threshold; When the throttle opening is not greater than the target throttle opening threshold, the current time is set as the valve opening time, and a corresponding valve opening signal is generated.

[0086] It should be noted that for the specific working principles of each component in the device embodiment, please refer to the corresponding section of the method embodiment, which will not be repeated here.

[0087] Corresponding to the above embodiments, such as Figure 6 As shown, the present invention also provides a schematic diagram of the structure of an engine controller, which may include: a processor 1 and a memory 2; The processor 1 and memory 2 communicate with each other via communication bus 3. Processor 1, for executing at least one instruction; Memory 2 is used to store at least one instruction; Processor 1 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.

[0088] Memory 2 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0089] The processor executes at least one instruction to implement the steps shown in the embodiment of the surge valve control method.

[0090] Corresponding to the above embodiments, see [link to relevant documentation]. Figure 7 The present invention discloses a schematic diagram of the structure of an engine, the engine comprising: Figure 2 The surge valve 301 shown in the embodiment, and Figure 6 In the illustrated embodiment, the engine controller 302 is connected to the electromagnetic coil in the surge valve 301.

[0091] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0092] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0093] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A surge valve, characterized in that, include: Surge valve housing, electrically controlled valve body, solenoid coil, and spring valve plate; The electrically controlled valve body is disposed in the cavity at the lower part of the surge valve housing. The bottom surface of the electrically controlled valve body and the inner cavity sealing surface of the surge valve housing form a line sealing structure. The opening and closing of the bottom air inlet is controlled by axial movement. The electromagnetic coil is installed in the cavity at the top of the surge valve housing, and drives the electronically controlled valve body to move axially through electromagnetic force; The side air outlet is located on the side of the surge valve housing and near the moving position of the electronically controlled valve body. The spring valve plate is provided inside the side air outlet. The electromagnetic coil drives the electronically controlled valve body to move upward according to the valve opening signal sent by the engine controller, opening the bottom air inlet to allow gas to enter the chamber of the surge valve housing, creating a pressure difference on both sides of the spring valve plate, and the spring valve plate automatically adjusts the opening angle according to the pressure difference to dynamically regulate the gas flow rate from the side air outlet.

2. The surge valve according to claim 1, characterized in that, Also includes: Valve body spring; The valve body spring is sleeved on the outer wall of the electrically controlled valve body and installed in the annular gap between the electrically controlled valve body and the inner cavity of the surge valve housing, providing axial preload to the electrically controlled valve body and ensuring that the electrically controlled valve body completely seals the bottom air inlet when not in operation.

3. The surge valve according to claim 1 or 2, characterized in that, The spring valve plate includes: a mechanical valve plate and a valve plate spring; The mechanical valve plate forms a rotating pair with the surge valve housing via a hinge shaft. The valve plate spring is sleeved on the hinge shaft in the form of a torsion spring. One end of the valve plate spring is fixed to the surge valve housing, and the other end is pressed into the spring seat on the back of the mechanical valve plate, so that the mechanical valve plate can rotate around the hinge shaft and automatically adjust the opening angle according to the pressure difference on both sides of the valve plate.

4. A surge valve control method, characterized in that, The surge valve is applied to an engine controller, wherein the engine controller is connected to the electromagnetic coil in the surge valve according to any one of claims 1 to 3, and the surge valve control method includes: Obtain the engine operating parameters at the current moment; Based on the engine operating parameters, it can be identified whether the turbocharger is in a surge condition; If the booster is determined to be in a surge condition, a valve opening signal is generated; The valve opening signal is sent to the electromagnetic coil, which drives the electronically controlled valve body to move upward according to the valve opening signal, opening the bottom air inlet to allow gas to enter the cavity of the surge valve housing, creating a pressure difference on both sides of the spring valve plate, and causing the spring valve plate to automatically adjust the opening angle according to the pressure difference, dynamically regulating the gas flow rate from the side air outlet.

5. The surge valve control method according to claim 4, characterized in that, The acquisition of the engine operating parameters at the current moment includes: Obtain the current throttle opening, throttle inlet pressure, engine speed, and throttle outlet pressure.

6. The surge valve control method according to claim 5, characterized in that, The step of identifying whether the turbocharger is in surge condition based on the engine operating parameters includes: Based on the throttle opening at the current moment, calculate the rate of change of the throttle opening at the current moment relative to the previous moment, and calculate the pressure difference before and after the throttle based on the pressure before and after the throttle. When the rate of change of the throttle opening is less than the rate of change limit, the pressure in front of the throttle is greater than the pressure limit, the engine speed is within the preset speed range, and the pressure difference across the throttle is less than the pressure difference limit, the turbocharger is determined to be in surge condition.

7. The surge valve control method according to claim 5 or 6, characterized in that, The step of generating a valve opening signal when it is determined that the booster is in a surge condition includes: Calculate the target pressure ratio between the throttle inlet pressure and the current ambient atmospheric pressure; The target offset compensation value corresponding to the target pressure ratio is determined from the preset correspondence between pressure ratio and offset compensation value; The reference throttle opening threshold is offset and compensated according to the target offset compensation value to obtain the target throttle opening threshold; When the throttle opening is not greater than the target throttle opening threshold, the current time is set as the valve opening time, and a corresponding valve opening signal is generated.

8. A surge valve control device, characterized in that, The surge valve control device is applied to an engine controller, wherein the engine controller is connected to the electromagnetic coil in the surge valve according to any one of claims 1 to 3, and the surge valve control device comprises: The parameter acquisition unit is used to acquire the engine operating parameters at the current moment. The surge condition identification unit is used to identify whether the turbocharger is in a surge condition based on the engine operating parameters. The signal generation unit is used to generate a valve opening signal when it is determined that the booster is in a surge condition; The signal transmitting unit is used to send the valve opening signal to the electromagnetic coil, so that the electromagnetic coil drives the electronically controlled valve body to move upward according to the valve opening signal, opening the bottom air inlet to allow gas to enter the cavity of the surge valve housing, so that a pressure difference is formed on both sides of the spring valve plate, and the spring valve plate automatically adjusts the opening angle according to the pressure difference, dynamically regulating the gas flow rate from the side air outlet.

9. An engine controller, characterized in that, include: Memory and processor; The memory is used to store at least one instruction; The processor is used to execute the at least one instruction to implement the surge valve control method as described in any one of claims 4 to 7.

10. An engine, characterized in that, include: The surge valve according to any one of claims 1 to 3, and the engine controller according to claim 9; The engine controller is connected to the solenoid coil in the surge valve.

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