A surge valve, a surge valve control method, and related devices

Abstract

The application discloses a surge valve, a surge valve control method and related devices, 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 piece. The electric control valve body is arranged in a cavity at the lower part of the surge valve shell, the bottom surface of the electric control valve body is in linear sealing with the surge valve shell, the electromagnetic coil is installed in a cavity at the top of the surge valve shell, the electric control valve body is driven to move axially by electromagnetic force, and the spring valve piece is arranged in the inside of the side gas outlet. The electromagnetic coil drives the electric control valve body to move upward according to a valve opening signal, opens the bottom gas inlet to make gas enter, and the spring valve piece automatically adjusts the opening angle to dynamically adjust the gas flow rate flowing out of the side gas outlet according to the pressure difference. The application realizes self-adaptive opening degree adjustment by the spring valve piece responding to the pressure difference change, makes the gas flow rate and the pressure difference form a matching relationship, improves the stability of the gas flow of the side gas outlet, and effectively suppresses the engine output torque fluctuation and abnormal pressure relief noise caused by the sudden change of the gas flow rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of surge valves, in particular to a surge valve, a surge valve control method and related devices. BACKGROUND

[0002] Under the condition of engine load reduction, if the electronic throttle valve is suddenly closed, the pressure before the throttle valve (i.e. the boost pressure) will suddenly increase, and the intake flow will suddenly decrease, which will cause the surge of the supercharger. At this time, the boost pressure is unstable and airflow noise is generated. To solve this problem, a surge valve is usually provided on a natural gas engine. When the throttle valve is suddenly closed, the surge valve is opened to avoid the sudden increase of the pressure before the throttle valve and the sudden decrease of the intake flow, thereby effectively avoiding the surge of the supercharger.

[0003] However, at the moment when the surge valve is opened, the pressure difference between the two sides of the valve plate will suddenly change, which will cause the sudden change of the gas flow, thereby inducing the air leakage noise and causing the sudden change of the engine output torque, and finally causing the vehicle to move suddenly. SUMMARY

[0004] Therefore, the present application 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 change of gas flow.

[0005] A surge valve comprises a surge valve housing, an electric control valve body, an electromagnetic coil and a spring valve plate.

[0006] The electric control valve body is arranged in the cavity at the lower part of the surge valve housing, and the bottom surface of the electric control valve body and the inner cavity sealing surface of the surge valve housing form a linear sealing structure, and the opening and closing of the bottom air inlet are controlled by axial movement.

[0007] The electromagnetic coil is installed in the cavity at the top of the surge valve housing, and the electric control valve body is driven to move axially by electromagnetic force.

[0008] The side air outlet is located on the side of the surge valve housing and close to the moving position of the electric control valve body, and the spring valve plate is arranged inside the side air outlet.

[0009] The electromagnetic coil drives the electric control valve body to move upward according to the valve opening signal sent by the engine controller, opens the bottom air inlet to make the gas enter the cavity of the surge valve housing, forms a pressure difference on both sides of the spring valve plate, and makes the spring valve plate automatically adjust the opening angle according to the pressure difference to dynamically adjust the gas flow from the side air outlet.

[0010] Optionally, it further comprises a valve body spring.

[0011] The valve body spring is sleeved on the outer wall of the electric control valve body and is installed in the annular gap between the electric control valve body and the surge valve shell cavity, thereby providing axial pre-tightening force for the electric control valve body and ensuring that the electric control valve body completely closes the bottom air inlet in a non-working state.

[0012] Optionally, the spring valve piece comprises a mechanical valve piece and a valve piece spring.

[0013] The mechanical valve piece forms a rotary pair with the surge valve shell through a hinge shaft, the valve piece spring is in the form of a torsion spring and is sleeved on the hinge shaft, one end of the valve piece spring is fixed to the surge valve shell, and the other end is pressed in the spring seat at the back of the mechanical valve piece, so that the mechanical valve piece can rotate around the hinge shaft and automatically adjust the opening angle according to the pressure difference on both sides of the valve piece.

[0014] A surge valve control method applied to an engine controller connected with the electromagnetic coil in the surge valve, the surge valve control method comprising:

[0015] Obtaining engine operating parameters at the current time;

[0016] Identifying whether the supercharger is in a surge working condition based on the engine operating parameters;

[0017] Generating a valve opening signal in the case of determining that the supercharger is in the surge working condition;

[0018] Sending the valve opening signal to the electromagnetic coil, so that the electromagnetic coil drives the electric control valve body to move upward according to the valve opening signal, opens the bottom air inlet, makes gas enter the chamber of the surge valve shell, forms a pressure difference on both sides of the spring valve piece, and makes the spring valve piece automatically adjust the opening angle according to the pressure difference, dynamically adjusts the gas flow rate flowing out of the side air outlet.

[0019] Optionally, the obtaining of the engine operating parameters at the current time comprises:

[0020] Obtaining the throttle opening degree, the pressure before the throttle, the engine speed and the pressure after the throttle at the current time.

[0021] Optionally, the identifying of whether the supercharger is in the surge working condition based on the engine operating parameters comprises:

[0022] Calculating the throttle opening degree change rate at the current time relative to the throttle opening degree at the last time based on the throttle opening degree at the current time, and calculating the pressure difference before and after the throttle based on the pressure before the throttle and the pressure after the throttle;

[0023] When the throttle opening rate is less than the rate limit, the throttle front pressure is greater than the pressure limit, the engine speed is within the preset speed range, and the throttle front-rear pressure difference is less than the pressure difference limit, it is determined that the supercharger is in a surge condition.

[0024] Optionally, the generating a valve opening signal in the case where it is determined that the supercharger is in a surge condition comprises:

[0025] calculating a target pressure ratio of the throttle front pressure and a current ambient atmospheric pressure;

[0026] determining a target offset compensation value corresponding to the target pressure ratio from a preset corresponding relationship between pressure ratios and offset compensation values;

[0027] offset compensating a reference throttle opening threshold value by the target offset compensation value to obtain a target throttle opening threshold value;

[0028] when the throttle opening is not greater than the target throttle opening threshold value, setting a current time as a valve opening time and generating a corresponding valve opening signal.

[0029] A surge valve control device applied to an engine controller, the engine controller being connected with an electromagnetic coil in the surge valve, the surge valve control device comprising:

[0030] a parameter acquisition unit configured to acquire engine operating parameters at a current time;

[0031] a surge condition identification unit configured to identify whether a supercharger is in a surge condition based on the engine operating parameters;

[0032] a signal generation unit configured to generate a valve opening signal in the case where it is determined that the supercharger is in a surge condition;

[0033] a signal sending unit configured to send the valve opening signal to the electromagnetic coil, so that the electromagnetic coil drives an electric control valve body to move upwards according to the valve opening signal, opens a bottom air inlet to make gas enter a chamber in a surge valve housing, forms a pressure difference between two sides of a spring valve plate, and makes the spring valve plate automatically adjust an opening angle according to the pressure difference to dynamically adjust a gas flow rate from a side air outlet.

[0034] An engine controller comprising a memory and a processor;

[0035] the memory is configured to store at least one instruction;

[0036] the processor is configured to execute the at least one instruction to implement any one of the surge valve control methods.

[0037] An engine comprising the surge valve and the engine controller described above.

[0038] The engine controller is connected with the electromagnetic coil in the surge valve.

[0039] From the above technical solution, the present application discloses a kind of surge valve, surge valve control method and related device, surge valve includes surge valve shell, electric control valve body, electromagnetic coil and spring valve piece, electric control valve body is arranged in the cavity of lower part of surge valve shell, the bottom surface of electric control valve body and the inner cavity sealing surface of surge valve shell form line seal structure, the opening and closing of bottom air inlet is controlled by axial movement, electromagnetic coil is installed in the cavity of top of surge valve shell, electric control valve body is driven to move axially by electromagnetic force, side air outlet is located in the side of surge valve shell and close to the position of electric control valve body movement, spring valve piece is arranged in the inside of side air outlet, electromagnetic coil drives electric control valve body to move up according to the valve opening signal sent by engine controller, opens bottom air inlet to make gas enter the cavity of surge valve shell, so that the pressure difference is formed on both sides of spring valve piece, spring valve piece is automatically adjusted opening angle according to pressure difference Dynamic regulation gas flow from side air outlet.The spring valve piece is added in the side air outlet of the present application, and the opening degree is adjusted by the spring valve piece responding to the pressure difference change, so that the gas flow and the pressure difference form dynamic matching relationship.This continuous flow regulation mechanism improves the stability and uniformity of side air outlet gas flow while driving surge valve to gradually open, effectively suppresses the engine output torque fluctuation and abnormal pressure relief noise caused by gas flow mutation, so as to ensure the smooth operation of vehicle power system. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by the disclosed drawings without creative labor for those skilled in the art.

[0041] Figure 1 It is a structural schematic diagram of surge valve in prior art scheme;

[0042] Figure 2 It is a structural schematic diagram of surge valve disclosed in an embodiment of the present application;

[0043] Figure 3 It is a flow chart of surge valve control method disclosed in an embodiment of the present application;

[0044] Figure 4 It is a flow chart of surge valve control method disclosed in an embodiment of the present application;

[0045] Figure 5 A structure schematic view of a surge valve control device disclosed by the embodiment of the present application;

[0046] Figure 6 A structure schematic view of an engine controller disclosed by the embodiment of the present application;

[0047] Figure 7 A structure schematic view of an engine disclosed by the embodiment of the present application. DETAILED DESCRIPTION

[0048] Surge valve: refers to the valve for controlling the backflow of the pressurized air to the front of the compressor when the electronic throttle valve of the natural gas engine is suddenly closed, and the surge valve can be in mechanical control mode or in electronic control mode. The present application mainly improves the electronic control mode surge valve.

[0049] Referring to Figure 1 , the structure schematic view of the surge valve in the prior art, when the valve plate of the surge valve is opened, the air flow enters from the position shown by the arrow on the lower side of the surge valve in Figure 1 , and flows out from the position shown by the arrow on the left side of the surge valve in Figure 1 , and during the instant of opening of the surge valve, due to the significant pressure difference on both sides of the valve plate, the transient air leakage process of the high-pressure air flow will generate obvious air leakage noise, at the same time, the sudden change of the air flow will cause the dramatic fluctuation of the engine output torque, and this torque disturbance is transmitted through the transmission system, and finally leads to the sudden movement of the vehicle.

[0050] To solve the above problems existing in the prior art surge valve, the present application improves the structure of the surge valve, so that the valve plate opening degree and the gas flow form a dynamic matching relationship, and at the same time, the closed-loop electronic control strategy is integrated, so that the control parameters can be optimized in real time according to the engine working condition, the engine output torque fluctuation and abnormal pressure relief noise caused by the sudden change of the gas flow are effectively inhibited, and the stable operation of the vehicle power system is ensured.

[0051] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0052] Referring to Figure 2 , the structure schematic view of the surge valve disclosed by the embodiment of the present application, the surge valve comprises a surge valve housing 10, an electrically controlled valve body 20, an electromagnetic coil 30 and a spring valve plate 40.

[0053] Specifically, the surge valve housing 10 is the base body of the entire surge valve, and has a cavity in the inside.

[0054] The electric control valve body 20 is arranged in the chamber of the lower part of the surge valve shell 10, and the bottom surface of the electric control valve body 20 forms a linear sealing structure with the inner chamber sealing surface of the surge valve shell 10, and the opening and closing of the bottom air inlet 01 is controlled by axial movement.

[0055] Specifically, when the electric control valve body 20 is not moved upward, the linear sealing structure formed by the bottom surface of the electric control valve body 20 and the inner chamber sealing surface of the surge valve shell 10 can block the gas from entering the chamber of the surge valve shell 10 from the bottom air inlet 01; when the electric control valve body 20 is moved upward, the bottom air inlet 01 is opened, so that the gas enters the chamber of the surge valve shell 10 from the bottom air inlet 01.

[0056] The electromagnetic coil 30 is installed in the chamber of the top part of the surge valve shell 10, and drives the electric control valve body 20 to move axially by electromagnetic force.

[0057] In actual application, the electromagnetic coil 30 can be installed in the chamber of the top part of the surge valve shell 10 by bolts or buckles, and the inner core of the electromagnetic coil 30 directly acts on the top part of the electric control valve body 20 by a push rod or magnetic force. The lead of the electromagnetic coil 30 is connected to the engine controller, and can receive the control signal sent by the engine controller, which can be a valve opening signal or a valve closing signal.

[0058] When the electromagnetic coil 30 receives the valve opening signal sent by the engine controller, the electromagnetic coil 30 generates a magnetic field, overcomes the spring force, and drives the electric control valve body 20 to move upward, at this time the linear sealing between the bottom surface of the electric control valve body 20 and the surge valve shell 10 is opened. When the electromagnetic coil 30 receives the valve closing signal sent by the engine controller, the electromagnetic force of the electromagnetic coil 30 disappears, and the electric control valve body 20 is pressed tightly on the sealing surface of the surge valve shell 10 by the reset spring, at this time the linear sealing between the bottom surface of the electric control valve body 20 and the surge valve shell 10 is closed.

[0059] The side air outlet 02 of the surge valve is located on the side of the surge valve shell 10 and close to the moving position of the electric control valve body 20, and the spring valve plate 40 is arranged in the inside of the side air outlet 02. Figure 2 As shown in the dashed box.

[0060] In actual application, the spring valve plate 40 is embedded in the side air outlet of the surge valve shell, and can be fixed by a connecting rod, a hinge or an elastic support. 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.

[0061] When the pressure difference is large, the gas impact force overcomes the spring force, the opening angle of the spring valve plate 40 gradually increases, so that the gas flow from the side gas outlet 02 gradually increases from small to large within a preset time period (for example, 1 second), thereby achieving the purpose of opening the surge valve while continuously changing the gas flow, effectively avoiding the torque mutation and air leakage noise caused by the sudden change of gas flow.

[0062] When the pressure difference is small, the opening angle of the spring valve plate 40 gradually decreases, so that the gas flow from the side gas outlet 02 decreases accordingly. Therefore, the spring valve plate 40 realizes continuous adjustment of the gas flow with the change of the pressure difference.

[0063] The working principle of the surge valve is:

[0064] The electromagnetic coil 30 drives the electric control valve body 20 to move up according to the valve opening signal sent by the engine controller, opens the bottom air inlet 01, makes the gas enter the chamber of the surge valve housing 10, and makes the spring valve plate 40 form a pressure difference on both sides, so that the spring valve plate 40 automatically adjusts the opening angle to dynamically adjust the gas flow from the side gas outlet 02.

[0065] Specifically, when the electromagnetic coil 30 receives the valve opening signal sent by the engine controller, the electromagnetic coil 30 generates a magnetic field, overcomes the spring force, and drives the electric control valve body 20 to move up. At this time, the line seal between the bottom surface of the electric control valve body 20 and the surge valve housing 10 is opened, the bottom air inlet 01 is opened, the gas enters the chamber of the surge valve housing 10 through the bottom air inlet 01, so that the spring valve plate 40 forms a pressure difference on both sides. When the pressure difference is large, the gas impact force overcomes the spring force, the opening angle of the spring valve plate 40 gradually increases, the gas flow from the side gas outlet 02 gradually increases from small to large, and the smooth transition of the gas flow passage is ensured, thereby effectively suppressing the engine output torque fluctuation and abnormal pressure relief noise caused by the sudden change of gas flow.

[0066] In summary, the present application discloses a surge valve, which comprises a surge valve shell 10, an electric control valve body 20, an electromagnetic coil 30 and a spring valve plate 40, the electric control valve body 20 is arranged in the cavity at the lower part of the surge valve shell 10, the bottom surface of the electric control valve body 20 and the inner cavity sealing surface of the surge valve shell 10 form a linear sealing structure, the opening and closing of the bottom air inlet 01 are controlled through axial movement, the electromagnetic coil 30 is installed in the cavity at the top of the surge valve shell 10, the electric control valve body 20 is driven to move axially through electromagnetic force, the side air outlet 02 is located on the side of the surge valve shell 10 and close to the moving position of the electric control valve body 20, the spring valve plate 40 is arranged in the inside of the side air outlet 02, the electromagnetic coil 30 drives the electric control valve body 20 to move upward according to the valve opening signal sent by the engine controller, the bottom air inlet 01 is opened, the gas enters the cavity of the surge valve shell 10, the pressure difference is formed on both sides of the spring valve plate 40, the spring valve plate 40 automatically adjusts the opening angle according to the pressure difference to dynamically adjust the gas flow from the side air outlet 02. The spring valve plate is added to the side air outlet in the present application, the self-adaptive opening degree adjustment is realized through the spring valve plate responding to the pressure difference change, and the dynamic matching relationship between the gas flow and the pressure difference is formed. The continuous flow adjustment mechanism improves the stability and uniformity of the gas flow of the side air outlet while driving the surge valve to gradually open, effectively suppresses the engine output torque fluctuation and abnormal pressure relief noise caused by the sudden change of the gas flow, and thus the smooth operation of the vehicle power system is ensured.

[0067] In one embodiment, in Figure 2 the embodiment shown, the surge valve can further comprise a valve body spring (not shown in the figure). Figure 2

[0068] The valve body spring is sleeved on the outer wall of the electric control valve body 20 and is installed in the annular gap between the electric control valve body 20 and the inner cavity of the surge valve shell 10, so as to provide axial pre-tightening force for the electric control valve body 20 and ensure that the electric control valve body 20 completely closes the bottom air inlet 01 in the non-working state.

[0069] In actual application, the valve body spring can be a cylindrical helical compression spring and is sleeved on the outer wall of the electric control valve body 20.

[0070] When the electric control valve body 20 is in the non-working state, the electromagnetic coil 30 is de-energized, and the valve body spring presses the electric control valve body 20 against the sealing surface of the bottom air inlet 01 through the axial pre-tightening force, so as to completely close the bottom air inlet 01.

[0071] In one embodiment, as Figure 2 shown, the spring valve plate 40 comprises a mechanical valve plate 41 and a valve plate spring 42.

[0072] ​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.

[0073] 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.

[0074] The valve spring 42 can be made of high-elasticity alloy wire, with its mean diameter matching that of the hinge shaft.

[0075] 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.

[0076] 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.

[0077] 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:

[0078] See Figure 3 The 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:

[0079] Step S101: Obtain the engine operating parameters at the current moment.

[0080] Engine operating parameters include, but are not limited to, throttle opening, throttle inlet pressure, engine speed, and throttle outlet pressure.

[0081] Step S102: Identify whether the turbocharger is in surge condition based on the engine operating parameters.

[0082] 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.

[0083] 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.

[0084] The calculation formula of the throttle opening rate of change is as follows:

[0085] Throttle opening rate of change = (throttle opening at t2 moment - throttle opening at t1 moment) / (t2 - t1);

[0086] Wherein, the current moment is represented by t2 moment, and the previous moment of the current moment is represented by t1.

[0087] The calculation formula of the throttle pressure difference △b is as follows:

[0088] △b = b - d;

[0089] In the formula, b represents the throttle pressure, and d represents the throttle pressure.

[0090] (2) When the throttle opening rate of change is less than the rate limit value, the throttle pressure is greater than the pressure limit value, the engine speed is in the preset speed range, and the throttle pressure difference is less than the pressure difference limit value, it is determined that the supercharger is in the surge condition.

[0091] Wherein, the rate limit value a0, the pressure limit value b0, the preset speed range (c0, c1) and the pressure difference limit value △b0 are determined according to actual needs, which are not limited in the application.

[0092] Step S103, in the case of determining that the supercharger is in the surge condition, a valve opening signal is generated.

[0093] Step S104, the valve opening signal is sent to the electromagnetic coil, so that the electromagnetic coil drives the electric control valve body to move up according to the valve opening signal, opens the bottom air inlet to make the gas enter the chamber of the surge valve shell, so that the pressure difference is formed on both sides of the spring valve piece, and the spring valve piece automatically adjusts the opening angle according to the pressure difference, and dynamically adjusts the gas flow from the side air outlet.

[0094] When the engine controller determines that the supercharger is in the surge condition according to the engine operating parameters, the valve opening signal is immediately generated, the valve opening signal is sent to the electromagnetic coil of the surge valve, so that the electromagnetic coil generates a magnetic field, overcomes the spring force, drives the electric control valve body to move up, at this time, the line seal between the bottom surface of the electric control valve body and the surge valve shell is opened, the bottom air inlet is opened, the gas enters the chamber of the surge valve shell through the bottom air inlet, so that the pressure difference is formed on both sides of the spring valve piece, when the pressure difference is large, the gas impact force overcomes the spring force, the opening angle of the spring valve piece gradually increases, and the gas flow from the side air outlet gradually increases from small to large, which ensures the smooth transition of the gas flow passage, thereby effectively inhibiting the engine output torque fluctuation and abnormal pressure relief noise caused by the sudden change of the gas flow.

[0095] In conclusion, the present application discloses a kind of surge valve control method, engine controller obtains the engine operating parameter of current time, and based on engine operating parameter identification supercharger whether in surge condition, in the case where determining that supercharger is in surge condition generates valve opening signal, valve opening signal is sent to electromagnetic coil, and the electromagnetic coil is driven according to valve opening signal and moves up in electric control valve body, opens bottom air inlet to make gas enter the chamber in surge valve shell, so that the pressure difference is formed on the both sides of spring valve piece, and spring valve piece is automatically adjusted opening angle according to pressure difference, and dynamic regulation gas flow from side air outlet.

[0096] The present application increases spring valve piece in side air outlet, and realizes self-adapting opening degree regulation by spring valve piece responding pressure difference change, so that dynamic matching relationship is formed between gas flow and pressure difference.This continuous flow regulation mechanism improves the stability and uniformity of side air outlet gas flow while driving surge valve to gradually open, effectively suppresses the engine output torque fluctuation and abnormal pressure relief noise caused by gas flow mutation, so as to guarantee the smooth operation of vehicle power system.

[0097] In one embodiment, step S103 can specifically include:

[0098] (1) calculate the target pressure ratio of throttle inlet pressure and current ambient atmospheric pressure.

[0099] The calculation formula of pressure ratio r is as follows:

[0100] r=b / e;

[0101] b represents throttle inlet pressure signal, and e represents atmospheric pressure.

[0102] The present application sets the ratio of throttle inlet pressure collected at current time and current ambient atmospheric pressure as target pressure ratio.

[0103] (2) determine the target offset compensation value corresponding to the target pressure ratio from the corresponding relationship between preset pressure ratio and offset compensation value.

[0104] Wherein, the corresponding relationship between pressure ratio and offset compensation value can be determined by bench test.

[0105] Compare target pressure ratio with each pressure ratio in corresponding relationship, and determine the offset compensation value of matching item as target offset compensation value.

[0106] (3) offset compensate reference throttle opening threshold according to the target offset compensation value, to obtain target throttle opening threshold.

[0107] The offset compensation refers to the compensation of the reference throttle opening threshold as the valve opening time, for example, the reference throttle opening threshold is 20%, the target offset compensation value corresponding to the pressure ratio 2.0 is 5%, and the corresponding target throttle opening threshold is 25%.

[0108] The present application implements dynamic correction on the reference throttle opening threshold by introducing the target offset compensation value based on real-time pressure ratio calculation, so as to realize accurate regulation and control on the opening time of the electric control valve body.

[0109] (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 the corresponding valve opening signal is generated.

[0110] In the sudden deceleration working condition (for example, the throttle opening suddenly drops from full throttle 100% to idle 10%), the control system dynamically determines the valve opening time of the surge valve taking the throttle opening as the core parameter.

[0111] Referring to Figure 4 , a specific embodiment of the present application discloses a surge valve control method flow chart, the method is applied to an engine controller, and the specific process is as follows:

[0112] (1) The input parameters of the engine controller include: a throttle opening signal a, a throttle front pressure signal b, an engine speed signal c, a throttle rear pressure signal d, and an atmospheric pressure e.

[0113] (2) When it is necessary to identify the surge working condition A, the surge working condition is identified according to the throttle opening signal a, the throttle front pressure signal b, the engine speed signal c, and the throttle rear pressure signal d.

[0114] Specifically, the throttle opening change rate is calculated, when it is determined that the throttle opening change rate is less than the change rate limit value a0, the throttle front pressure signal b is greater than the limit value b0, and the engine speed is in a certain range (c0, c1), the pressure difference △b = b-d between the throttle front and rear is calculated, when the pressure difference △b is less than the pressure difference limit value △b0, it is determined that the supercharger is in the surge working condition, and the pressure ratio r = b / e is calculated.

[0115] (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 corresponding relationship between the pre-set pressure ratio and the offset compensation value, the reference throttle opening threshold is offset compensated according to the target offset compensation value, and the target throttle opening threshold is obtained. 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.

[0116] Corresponding to the above method embodiment, the present application further discloses a surge valve control device.

[0117] Referring toFigure 5 The structure diagram of the surge valve control device is disclosed in the embodiment of the application, which is applied to an engine controller, the engine controller is connected with the electromagnetic coil in the surge valve, and the surge valve control device comprises: Figure 2

[0118] A parameter acquisition unit 201 is configured to acquire engine operation parameters at a current time.

[0119] The engine operation parameters include, but are not limited to, a throttle opening degree, a pressure before the throttle, an engine speed and a pressure after the throttle.

[0120] A surge condition recognition unit 202 is configured to recognize whether a supercharger is in a surge condition based on the engine operation parameters.

[0121] The surge condition recognition unit 202 can be specifically configured to:

[0122] calculate a throttle opening degree change rate of the current time relative to a previous time based on the throttle opening degree at the current time, and calculate a pressure difference before and after the throttle based on the pressure before the throttle and the pressure after the throttle.

[0123] When the throttle opening degree change rate is less than a change rate limit value, the pressure before the throttle is greater than a pressure limit value, the engine speed is within a preset speed range, and the pressure difference before and after the throttle is less than a pressure difference limit value, it is determined that the supercharger is in the surge condition.

[0124] A signal generation unit 203 is configured to generate a valve opening signal when it is determined that the supercharger is in the surge condition.

[0125] A signal sending unit 204 is configured to send the valve opening signal to the electromagnetic coil, so that the electromagnetic coil drives an electric control valve body to move upward according to the valve opening signal, opens a bottom air inlet to make gas enter a chamber in a surge valve housing, forms a pressure difference on both sides of a spring valve piece, and makes the spring valve piece automatically adjust an opening angle according to the pressure difference, so as to dynamically adjust a gas flow rate from a side air outlet.

[0126] ​When the engine controller determines that the supercharger is in a surge working condition according to the engine operating parameters, the valve opening signal is immediately generated, the electromagnetic coil is driven to generate a magnetic field by sending the valve opening signal to the electromagnetic coil of the surge valve, the spring force is overcome, the electric control valve body is driven to move upward, at this time, the line seal between the bottom surface of the electric control valve body and the surge valve shell is opened, the bottom air inlet is opened, the gas enters the cavity of the surge valve shell through the bottom air inlet, and a pressure difference is formed on both sides of the spring valve piece, when the pressure difference is large, the gas impact force overcomes the spring force, the opening angle of the spring valve piece gradually increases, and the gas flow from the side air outlet gradually increases from small to large, so that the smooth transition of the gas flow channel is ensured, and the engine output torque fluctuation and abnormal pressure relief noise caused by the sudden change of the gas flow are effectively inhibited.

[0127] In conclusion, the application discloses a kind of surge valve control device, engine controller obtains the engine operating parameters of current time, and based on engine operating parameters identification supercharger whether in surge working condition, in the case where determining that the supercharger is in surge working condition, valve opening signal is generated, valve opening signal is sent to electromagnetic coil, and the electromagnetic coil is driven to move upward according to valve opening signal electric control valve body, open bottom air inlet to make gas enter the cavity of surge valve shell, so that pressure difference is formed on both sides of spring valve piece, and spring valve piece is automatically adjusted opening angle according to pressure difference, and dynamic regulation gas flow from side air outlet.

[0128] The application increases spring valve piece in side air outlet, realizes self-adapting opening degree regulation by spring valve piece responding pressure difference change, so that dynamic matching relationship is formed between gas flow and pressure difference.This continuous flow regulation mechanism improves the stability and uniformity of side air outlet gas flow while driving surge valve to gradually open, effectively inhibits the engine output torque fluctuation and abnormal pressure relief noise caused by the sudden change of gas flow, so as to ensure the smooth operation of vehicle power system.

[0129] In one embodiment, the signal generation unit 203 can be specifically used for:

[0130] Calculate the target pressure ratio of the pre-throttle pressure and the current ambient atmospheric pressure;

[0131] From the pre-set corresponding relationship between the pressure ratio and the offset compensation value, determine the target offset compensation value corresponding to the target pressure ratio;

[0132] Offset compensate the reference throttle opening threshold value according to the target offset compensation value to obtain a target throttle opening threshold value;

[0133] When the throttle opening is not greater than the target throttle opening threshold value, the current time is set as the valve opening time, and the corresponding valve opening signal is generated.

[0134] It should be noted that the specific working principles of the components in the device embodiment are described in the corresponding part of the method embodiment, which will not be repeated here.

[0135] Corresponding to the above-mentioned embodiments, as shown in Figure 6 The present application also provides a structural diagram of an engine controller, which can include a processor 1 and a memory 2.

[0136] The processor 1 and the memory 2 complete mutual communication through a communication bus 3.

[0137] The processor 1 is configured to execute at least one instruction.

[0138] The memory 2 is configured to store at least one instruction.

[0139] The processor 1 can be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0140] The memory 2 can include a high-speed RAM memory, and can also include a non-volatile memory, such as at least one disk memory.

[0141] The processor executes at least one instruction to implement the steps shown in the surge valve control method embodiment.

[0142] Corresponding to the above-mentioned embodiments, referring to Figure 7 The present application discloses a structural diagram of an engine, which includes Figure 2 The surge valve 301 in the embodiment shown in Figure 6 The engine controller 302 in the embodiment shown in

[0143] Finally, it should be noted that the terms "first", "second", and the like, herein do not denote any order, quantity, combination, or importance, but rather are used to distinguish one element from another, and are not intended to denote the presence of any such actual relationship or order. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0144] The various embodiments in the specification are described in progressive order with reference to each embodiment, each embodiment highlighting differences from other embodiments, and the same or similar elements in the various embodiments are referred to each other where applicable in the respective embodiments.

[0145] The above description of disclosed embodiments provides enabling disclosure sufficient for one of ordinary skill in the art to practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present 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 control method characterized by, The application is applied to an engine controller connected with an electromagnetic coil in a surge valve. The surge valve comprises a surge valve shell, an electric control valve body, an electromagnetic coil and a spring valve piece; the electric control valve body is arranged in a cavity at the lower part of the surge valve shell; the bottom surface of the electric control valve body forms a linear sealing structure with the inner cavity sealing surface of the surge valve shell; the electric control valve body controls the opening and closing of the bottom air inlet through axial movement. The electromagnetic coil is installed in a cavity at the top of the surge valve shell and drives the electric control valve body to move axially through electromagnetic force; the side air outlet is located at the side of the surge valve shell and close to the moving position of the electric control valve body; the spring valve piece is arranged inside the side air outlet. The surge valve control method comprises: obtaining engine operating parameters at the current time; identifying whether the supercharger is in a surge working condition based on the engine operating parameters; generating a valve opening signal when it is determined that the supercharger is in a surge working condition; sending the valve opening signal to the electromagnetic coil so that the electromagnetic coil drives the electric control valve body to move upward according to the valve opening signal, opens the bottom air inlet to make gas enter the cavity of the surge valve shell, forms a pressure difference on both sides of the spring valve piece, and makes the spring valve piece automatically adjust the opening angle according to the pressure difference to dynamically adjust the gas flow rate from the side air outlet; the obtaining of the engine operating parameters at the current time comprises: obtaining the throttle opening degree, the pressure before the throttle, the engine speed and the pressure after the throttle at the current time; the identification of whether the supercharger is in a surge working condition based on the engine operating parameters comprises: calculating the throttle opening degree change rate at the current time relative to the throttle opening degree at the previous time based on the throttle opening degree at the current time, and calculating the pressure difference before and after the throttle based on the pressure before the throttle and the pressure after the throttle; determining that the supercharger is in a surge working condition when the throttle opening degree change rate is less than the change rate limit value, the pressure before the throttle is greater than the pressure limit value, the engine speed is within the preset speed range, and the pressure difference before and after the throttle is less than the pressure difference limit value; the generation of the valve opening signal when it is determined that the supercharger is in a surge working condition comprises: calculating the target pressure ratio of the pressure before the throttle and the current ambient atmospheric pressure; determining the target offset compensation value corresponding to the target pressure ratio from the corresponding relationship between the preset pressure ratio and the offset compensation value; offset compensating the reference throttle opening degree threshold value by the target offset compensation value to obtain a target throttle opening degree threshold value; setting the time when the throttle opening degree is not greater than the target throttle opening degree threshold value as the valve opening time and generating the corresponding valve opening signal.

2. A surge valve for performing the method of claim 1, characterized by It comprises: a surge valve shell, an electric control valve body, an electromagnetic coil and a spring valve piece; the electric control valve body is arranged in a cavity at the lower part of the surge valve shell; the bottom surface of the electric control valve body forms a linear sealing structure with the inner cavity sealing surface of the surge valve shell; the electric control valve body controls the opening and closing of the bottom air inlet through axial movement. the electromagnetic coil is installed in a cavity at the top of the surge valve shell and drives the electric control valve body to move axially through electromagnetic force; The side gas outlet is located on the side of the surge valve shell and close to the position where the electric control valve body moves, and the spring valve plate is arranged inside the side gas outlet; The electromagnetic coil drives the electric control valve body to move upward according to the valve opening signal sent by the engine controller, opens the bottom gas inlet, and makes gas enter the cavity of the surge valve shell, 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 to dynamically adjust the gas flow rate flowing out of the side gas outlet.

3. The surge valve of claim 2, wherein Further comprising: A valve body spring; The valve body spring is sleeved on the outer wall of the electric control valve body and is installed in the annular gap between the electric control valve body and the inner cavity of the surge valve shell, providing axial pre-tightening force for the electric control valve body, and ensuring that the electric control valve body completely closes the bottom gas inlet in a non-working state.

4. The anti-surge valve according to claim 2 or 3, characterized in that The spring valve plate comprises a mechanical valve plate and a valve plate spring; The mechanical valve plate forms a rotary pair with the surge valve shell through a hinge shaft, the valve plate spring is in the form of a torsional spring and is sleeved on the hinge shaft, one end of the valve plate spring is fixed to the surge valve shell, and the other end is pressed in 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.

5. A surge valve control device for performing the method of claim 1, characterized by The engine controller is connected with the electromagnetic coil in the surge valve of any one of claims 2-4, and the surge valve control device comprises: A parameter acquisition unit is configured to acquire engine operating parameters at the current time; A surge working condition recognition unit is configured to recognize whether the supercharger is in a surge working condition based on the engine operating parameters; A signal generation unit is configured to generate a valve opening signal when it is determined that the supercharger is in a surge working condition; A signal sending unit is configured to send the valve opening signal to the electromagnetic coil, so that the electromagnetic coil drives the electric control valve body to move upward according to the valve opening signal, opens the bottom gas inlet, and makes gas enter the cavity of the surge valve shell, 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 to dynamically adjust the gas flow rate flowing out of the side gas outlet.

6. An engine controller characterized by, Comprise: A memory and a processor; The memory is configured to store at least one instruction; The processor is configured to execute the at least one instruction to implement the surge valve control method of claim 1.

7. An engine characterized by, Comprise: The surge valve of any one of claims 2-4 and the engine controller of claim 6; The engine controller is connected with the electromagnetic coil in the surge valve.

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