Turbocharger control method, device and equipment and storage medium

Abstract

The invention discloses a turbocharger control method, device and equipment and a storage medium, and relates to the technical field of superchargers, a turbocharger comprises a three-way valve, a turbocharger impeller, an air inlet intercooler, an air filter and a waste gas bypass valve, a first channel of the three-way valve is connected with the turbocharger impeller, and a second channel of the three-way valve is connected with the air inlet intercooler; the third channel is connected with the outlet end of the air filter through a pipeline, and the method comprises the steps that when the current operation state of the engine is the first operation state, the current rotating speed of the engine is determined; and when the current rotating speed of the engine is smaller than the intervention rotating speed of the supercharger, the waste gas bypass valve is controlled to be opened, the second channel and the third channel are controlled to be communicated, and the first channel is controlled to be disconnected. By means of the mode, when the turbocharger does not need to be involved, the turbocharger impeller cannot rotate due to air resistance, at the moment, a turbocharger bearing does not need to be lubricated, the displacement of an oil pump and oil consumption of an engine at the low rotating speed are reduced, cost is saved, and meanwhile the service life of the turbocharger bearing is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of superchargers, and in particular to a turbocharger control method, device, equipment and storage medium. Background Art

[0002] Turbochargers are widely used in high-efficiency gasoline engines to improve the power and torque of small-displacement engines. Turbochargers use engine exhaust gas to drive the turbine at the turbine end of the supercharger to rotate. The turbine drives the compressor blades to rotate through the intermediate body shaft, thereby increasing the engine intake pressure, increasing the engine intake volume, and increasing the engine power and torque. The speed at which the supercharger blades drive the intermediate body to rotate is very high (tens of thousands to hundreds of thousands of revolutions per minute), and a bearing is arranged between the intermediate body shaft and the supercharger housing. The engine oil pump is required to pump oil to lubricate the intermediate body bearing to ensure the reliability of the supercharger. However, when the engine speed is low, the traditional supercharger generally does not supercharge the intake air due to insufficient boost pressure. However, the supercharger still rotates at a speed of several thousand to tens of thousands of revolutions under the action of exhaust gas, and lubricating oil is also required to lubricate the supercharger, resulting in the engine oil pump displacement needing to be larger. At medium and high speeds, the oil pump capacity is even more excessive, wasting engine power and causing the engine fuel consumption to increase.

[0003] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present application is to provide a turbocharger control method, device, equipment and storage medium, aiming to solve the technical problem in the prior art that in order to meet the low-speed lubrication requirements of the turbocharger, the oil pump capacity is excessive and the engine fuel consumption increases.

[0005] To achieve the above object, the present application proposes a turbocharger control method, wherein the turbocharger includes a three-way valve, a turbocharger impeller, an intake intercooler, an air filter, and an exhaust gas bypass valve, wherein a first channel of the three-way valve is connected to the turbocharger impeller, a second channel of the three-way valve is connected to the intake intercooler, and a third channel of the three-way valve is connected to an outlet end of the air filter through a pipeline, and the turbocharger control method includes:

[0006] When the current operating state of the engine is a first operating state, determining a current engine speed;

[0007] When the current speed of the engine is less than the supercharger intervention speed, the wastegate valve is controlled to be opened, the second channel and the third channel are controlled to be connected, and the first channel is controlled to be disconnected.

[0008] In one embodiment, after the step of determining the current engine speed when the current operating state is the first operating state, the method further includes:

[0009] When the current speed of the engine is greater than or equal to the supercharger intervention speed, the wastegate valve is controlled to be closed, the first channel and the second channel are controlled to be connected, and the third channel is controlled to be disconnected.

[0010] In one embodiment, when the current operating state of the engine is the first operating state, before the step of determining the current engine speed, the step further includes:

[0011] Get the current operation information of the target vehicle;

[0012] determining a current engine speed and a throttle opening according to the current operating information;

[0013] The current operating state of the engine is determined according to the current engine speed and the throttle opening.

[0014] In one embodiment, after the step of determining the current operating state of the engine according to the current engine speed and the throttle opening, the method further includes:

[0015] When the current operating state of the engine is the second operating state, the valve opening of the three-way valve is adjusted, the first channel, the second channel and the third channel are controlled to be connected, the exhaust bypass valve is controlled to open, and the valve opening of the exhaust bypass valve is adjusted.

[0016] In one embodiment, the step of adjusting the valve opening of the three-way valve comprises:

[0017] determining a gas distribution ratio according to a target boost pressure and high-pressure boost air;

[0018] determining a target valve opening according to the gas distribution ratio;

[0019] The valve opening of the three-way valve is adjusted to the target valve opening.

[0020] In one embodiment, after the step of determining the current operating state of the engine according to the current engine speed and the throttle opening, the method further includes:

[0021] When the current operating state is the shutdown state, the wastegate valve is controlled to be opened, the second channel and the third channel are controlled to be connected, the first channel is controlled to be disconnected, and the engine throttle is controlled to be closed.

[0022] In one embodiment, the step of determining the current operating state of the engine according to the current engine speed and the throttle opening comprises:

[0023] When the throttle opening is a preset opening and the current engine speed is a preset speed, determining that the current operating state of the engine is a shutdown state;

[0024] When the throttle opening is not a preset opening and the current engine speed is not a preset speed, acquiring throttle opening change information;

[0025] determining a throttle change state according to the throttle opening change information;

[0026] When the throttle valve change state is an opening degree reduction state, it is determined that the current operation state of the engine is a second operation state.

[0027] In addition, to achieve the above-mentioned purpose, the present application also proposes a turbocharger control device, the turbocharger control device comprising: a processing module, for determining a current engine speed when the current operating state of the engine is a first operating state;

[0028] The control module is used to control the exhaust bypass valve to open, control the second channel to be connected to the third channel, and control the first channel to be disconnected when the current speed of the engine is less than the supercharger intervention speed.

[0029] In addition, to achieve the above-mentioned purpose, the present application also proposes a turbocharger control device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the turbocharger control method as described above.

[0030] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the turbocharger control method described above are implemented.

[0031] The present application provides a turbocharger control method. The turbocharger of the present application includes a three-way valve, a supercharger impeller, an intake intercooler, an air filter and an exhaust gas bypass valve. The first channel of the three-way valve is connected to the supercharger impeller, the second channel of the three-way valve is connected to the intake intercooler, and the third channel of the three-way valve is connected to the outlet end of the air filter through a pipeline. The turbocharger control method includes: when the current operating state of the engine is the first operating state, determining the current speed of the engine; when the current speed of the engine is less than the supercharger intervention speed, controlling the exhaust gas bypass valve to open, controlling the second channel and the third channel to be connected, and controlling the first channel to be disconnected. Through the above method, the pressure relief valve in the traditional turbocharger is replaced with a three-way valve. When the current engine speed is less than the supercharger intervention speed, the exhaust bypass valve is controlled to open, the second channel and the third channel are controlled to be connected, and the first channel is controlled to be disconnected. When the turbocharger does not need to intervene, the supercharger impeller cannot rotate due to air resistance. At this time, there is no need to lubricate the supercharger bearing, which reduces the oil pump displacement and the fuel consumption at low engine speed, saves costs, and at the same time increases the life of the supercharger bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0034] Figure 1 A schematic diagram of a flow chart provided for the first embodiment of the turbocharger control method of the present application;

[0035] Figure 2 A schematic diagram of a conventional turbocharger structure of a turbocharger control method provided in Example 1 of the present application;

[0036] Figure 3 A schematic diagram of the structure of an improved turbocharger according to the turbocharger control method provided in Example 1 of the present application;

[0037] Figure 4 A schematic diagram of a flow chart provided for the second embodiment of the turbocharger control method of the present application;

[0038] Figure 5 This is a schematic diagram of the module structure of a turbocharger control device according to an embodiment of the present application;

[0039] Figure 6Schematic diagram of the device structure of the hardware operating environment involved in the turbocharger control method in the embodiment of the present application.

[0040] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0042] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0043] The main solution of the embodiment of the present application is: when the current operating state of the engine is the first operating state, determine the current speed of the engine; when the current speed of the engine is less than the supercharger intervention speed, control the exhaust bypass valve to open, control the second channel and the third channel to be connected, and control the first channel to be disconnected.

[0044] When the engine is started and runs at idle speed and low speed, the engine exhaust volume is insufficient and the exhaust pressure is low, resulting in insufficient supercharger boost pressure, which cannot increase the engine intake volume, but increases the engine exhaust resistance. Therefore, when the engine runs at low speed, the turbine is generally not required to intervene, and the exhaust bypass valve is opened to reduce the engine exhaust resistance. However, at this time, the exhaust gas discharged from the engine exhaust manifold will still partially pass through the turbine to drive the supercharger turbine to rotate. The turbine rotation speed can reach thousands to tens of thousands of revolutions. At this time, in order to lubricate the supercharger intermediate bearing, it is still necessary to provide lubricating oil to the supercharger bearing. Therefore, the engine oil pump must have a large displacement to meet the low-speed lubrication requirements of the supercharger.

[0045] At present, since the engine oil pump is driven by the engine crankshaft, the crankshaft speed is proportional to the oil pump speed. The amount of oil pumped out by the oil pump = oil pump displacement x oil pump speed, so as the engine speed increases, the amount of oil pumped out by the oil pump increases in proportion to the speed. Generally, in order to meet the low-speed flow requirements of the engine, the oil pump displacement is made larger, resulting in excess oil pump capacity at medium and high engine speeds, wasting engine power and increasing fuel consumption. When the engine speed is low, the traditional supercharger generally does not supercharge the intake air due to insufficient boost pressure, but the supercharger still rotates at a speed of several thousand to tens of thousands of revolutions under the action of exhaust gas, and it is also necessary to provide lubricating oil to the supercharger, resulting in the engine oil pump displacement needs to be larger, and the oil pump capacity is even more excessive at medium and high speeds, wasting engine power and increasing engine fuel consumption.

[0046] The present application replaces the pressure relief valve in the traditional turbocharger with a three-way valve. When the current engine speed is less than the supercharger intervention speed, the exhaust bypass valve is controlled to open, the second channel and the third channel are controlled to be connected, and the first channel is controlled to be disconnected. When the turbocharger does not need to intervene, the supercharger impeller cannot rotate due to air resistance. At this time, there is no need to lubricate the supercharger bearing, which reduces the oil pump displacement and the fuel consumption at low engine speed, saves costs, and at the same time increases the life of the supercharger bearing.

[0047] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a turbocharger control device, etc. The turbocharger control device is taken as an example to illustrate this embodiment and the following embodiments.

[0048] Based on this, the embodiment of the present application provides a turbocharger control method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the turbocharger control method of the present application.

[0049] In this embodiment, the turbocharger includes a three-way valve, a turbocharger impeller, an intake intercooler, an air filter, and an exhaust bypass valve. The first channel of the three-way valve is connected to the turbocharger impeller, the second channel of the three-way valve is connected to the intake intercooler, and the third channel of the three-way valve is connected to the outlet end of the air filter through a pipeline. The turbocharger control method includes steps S10 to S20:

[0050] It should be noted that if Figure 2 As shown in the figure, the turbine end of the conventional turbocharger is connected to the exhaust manifold of the engine, and an exhaust bypass valve is set before and after the turbine. The exhaust gas discharged by the engine drives the turbocharger turbine to rotate, and the exhaust gas is then purified by the catalyst and discharged to the atmosphere through the exhaust pipe. The turbocharger has a turbine at one end and a compressor impeller at the other end. The compressor impeller and the turbine are connected by a shaft. When the exhaust gas drives the turbine to rotate, it also drives the compressor impeller to rotate synchronously. The fresh air filtered by the air filter is compressed and supercharged by the compressor impeller and then enters the intake intercooler to cool the compressed gas, and then enters the intake manifold through the throttle and enters the combustion chamber to be burned. A pressure relief valve is added after the supercharger (after the impeller), mainly to release part of the supercharged gas through the pressure relief valve when the supercharged pressure exceeds the target value (mainly when the engine reduces the load), and reduce the intake supercharged pressure to the target pressure. When the engine is shut down, the throttle will be closed. In order to protect the throttle and the supercharged pipeline, the pressure relief valve will also be opened to release the high-pressure gas.

[0051] It is understandable that when the engine of a traditional turbocharger is started, it takes a certain amount of time for the oil pump to pump oil to the supercharger to build up oil pressure (generally more than 4 seconds). Before the oil pressure is built up, the supercharger will also rotate at high speed under the push of exhaust gas, which will cause great wear on the supercharger bearing and reduce the life of the supercharger. After the engine is shut down, the supercharger still keeps rotating at high speed under the inertia of the turbine. At this time, the oil pump has stopped pumping oil. The high-speed rotation of the supercharger bearing without oil will also cause great wear on the supercharger bearing and reduce the life of the supercharger.

[0052] In the specific implementation, when using a traditional turbocharger, when the engine speed is lower than the supercharger intervention speed, the bypass valve will be opened, the pressure relief valve will be opened, and the supercharger will still rotate and need lubrication; when the speed is higher than the supercharger intervention speed, under different working conditions, such as: speed, load increase or decrease, to achieve the target boost pressure, the bypass valve is used to adjust, at this time the pressure relief valve is closed, and the bypass valve can be adjusted to different openings, which has a certain hysteresis, resulting in slow power response. At the same time, when the load drops rapidly, such as sudden braking, sudden deceleration or parking, the bypass valve and the pressure relief valve will be opened at the same time, and the supercharger will still rotate and need lubrication.

[0053] It should be noted that the turbocharger in this embodiment is Figure 3 As shown, this embodiment replaces the traditional pressure relief valve with a three-way valve, including a three-way valve, a supercharger impeller, an intake intercooler, an air filter, an exhaust bypass valve, an air flow meter, a throttle, a cylinder, a turbine, and an oxygen sensor. The first channel (i.e., channel 1) of the three-way valve is connected to the supercharger impeller, the second channel (i.e., channel 2) is connected to the intake intercooler, and the third channel (i.e., channel 3) is connected to the outlet end of the air filter (i.e., after the air filter) through a pipeline.

[0054] It is understandable that, when the turbocharger of this embodiment is used, the bypass valve will be opened when the engine speed is lower than the supercharger intervention speed, and the three-way valve will control the channel 2 and channel 3 to be connected and the channel 1 to be disconnected, and the supercharger will not rotate and does not need lubrication. When the speed is higher than the supercharger intervention speed, under different working conditions, such as: the speed and load increase or decrease, the bypass valve and the three-way valve are used to adjust the target boost pressure. The bypass valve can adjust different openings, and the three-way valve can be adjusted at the same time. For example: when the speed and load increase, the boost pressure is less than the target pressure. At this time, the three-way valve can be controlled to connect channel 1 and channel 2, and channel 3 can be disconnected; when the speed and load decrease, the intake boost pressure is greater than the target pressure. At this time, the three-way valve channel 1, channel 2, and channel 3 can be controlled to be connected, and channel 2 and channel 3 distribute the flow according to the preset ratio, so as to speed up the pressure regulation speed and achieve fast power response. At the same time, when the load drops rapidly, such as during sudden braking, sudden deceleration or parking, the bypass valve will be opened, connecting channel 2 and channel 3 of the three-way valve, and channel 1 will be disconnected. At this time, the supercharger will not rotate and does not require lubrication.

[0055] Step S10, when the current operating state of the engine is the first operating state, determining the current engine speed.

[0056] It should be noted that the first operating state refers to a state in which the engine is operating normally without reducing the load, and the current engine speed is obtained at this time.

[0057] In a feasible implementation manner, after step S10, step A11 may be included:

[0058] Step A11, when the current speed of the engine is greater than or equal to the supercharger intervention speed, the wastegate valve is controlled to be closed, the first channel and the second channel are controlled to be connected, and the third channel is controlled to be disconnected.

[0059] It should be noted that the supercharger intervention speed refers to the engine speed point at which the turbocharger begins to significantly affect the intake pressure, thereby increasing the engine output power, that is, a threshold of the engine speed. When the engine reaches or exceeds this speed, the supercharger begins to effectively increase the air pressure entering the engine. In this embodiment, the supercharger intervention speed can be set to 1400rpm, or it can be set to other values, which are not limited in this embodiment.

[0060] It can be understood that when the current engine speed is greater than or equal to the supercharger intervention speed, the wastegate valve is controlled to be closed, the first channel and the second channel are controlled to be connected, and the third channel is controlled to be disconnected. Under the above control conditions, the intake air is pressurized by the turbocharger, cooled by the intake intercooler, and then enters the engine combustion chamber through the throttle control to be burned.

[0061] Step S20, when the current speed of the engine is less than the supercharger intervention speed, the wastegate valve is controlled to be opened, the second channel and the third channel are controlled to be connected, and the first channel is controlled to be disconnected.

[0062] It should be noted that when the current engine speed is less than the supercharger intervention speed, the exhaust bypass valve is controlled to open, the second channel and the third channel of the three-way valve are controlled to be connected, and the first channel is controlled to be disconnected. Under the above control conditions, the gas after the air filter is directly bypassed to the intake intercooler, and because the first channel is disconnected, the supercharger impeller cannot rotate due to air resistance, so the supercharger bearing does not need to be lubricated at this stage. When designing the oil pump, the lubrication requirements below the supercharger intervention speed do not need to be considered. The oil pump displacement can be reduced a lot, saving costs and reducing the fuel consumption of the engine at low speed. At the same time, it also avoids high-speed rotation without oil lubrication when the engine starts, and improves the life of the supercharger bearing.

[0063] The present embodiment provides a turbocharger control method. The turbocharger of the present embodiment includes a three-way valve, a supercharger impeller, an intake intercooler, an air filter and an exhaust gas bypass valve. The first channel of the three-way valve is connected to the supercharger impeller, the second channel of the three-way valve is connected to the intake intercooler, and the third channel of the three-way valve is connected to the outlet end of the air filter through a pipeline. The turbocharger control method includes: when the current operating state of the engine is the first operating state, determining the current speed of the engine; when the current speed of the engine is less than the supercharger intervention speed, controlling the exhaust gas bypass valve to open, controlling the second channel and the third channel to be connected, and controlling the first channel to be disconnected. Through the above method, the pressure relief valve in the traditional turbocharger is replaced with a three-way valve. When the current engine speed is less than the supercharger intervention speed, the exhaust bypass valve is controlled to open, the second channel and the third channel are controlled to be connected, and the first channel is controlled to be disconnected. When the turbocharger does not need to intervene, the supercharger impeller cannot rotate due to air resistance. At this time, there is no need to lubricate the supercharger bearing, which reduces the oil pump displacement and the fuel consumption at low engine speed, saves costs, and at the same time increases the life of the supercharger bearing.

[0064] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 4 Before step S10, the turbocharger control method further includes steps S01 to S03:

[0065] Step S01, obtaining the current operation information of the target vehicle.

[0066] It should be noted that the current operating information includes but is not limited to the current engine speed, throttle opening, fuel injection amount, ignition timing, intake pressure and other operating information.

[0067] Step S02, determining the current engine speed and throttle opening according to the current operating information.

[0068] Step S03, determining the current operating state of the engine according to the current engine speed and the throttle opening.

[0069] It should be noted that when the engine is running normally and the load is not reduced, the engine speed will stabilize within a range according to driving conditions and gear; the throttle opening will change accordingly according to the accelerator pedal input to match the required power output. When the engine is reduced in load, the throttle opening will decrease to accommodate the smaller power demand; if the throttle position is fixed, the load reduction may cause the speed to increase temporarily until the ECU makes adjustments. When the engine is stopped, the engine speed drops to zero and the throttle is closed to prevent air from entering the stopped engine.

[0070] It is understood that the operating state of the engine includes a first operating state, a second operating state and a shutdown state, wherein the first operating state refers to a state in which the engine is operating normally without reducing the load, and the second operating state refers to a state in which the engine is reducing the load. The current operating state of the engine can be determined based on the current engine speed and the throttle opening.

[0071] In a feasible implementation manner, after step S03, step B11 may be included:

[0072] Step B11, when the current operating state of the engine is the second operating state, the valve opening of the three-way valve is adjusted, the first channel, the second channel and the third channel are controlled to be connected, the exhaust bypass valve is controlled to open, and the valve opening of the exhaust bypass valve is adjusted.

[0073] It should be noted that when the current operating state of the engine is the second operating state, the engine reduces the load, but the intake boost pressure is greater than the target boost pressure. At this time, the wastegate valve is opened and the valve opening of the wastegate valve is increased, so that the gas entering the wastegate valve increases and the gas entering the turbine decreases, thereby reducing the intake boost pressure, and the first channel, the second channel and the third channel are controlled to be connected, and the valve opening of the three-way valve is adjusted to reduce the intake pressure to the target boost pressure. Through the above control method, the pressure regulation speed can be accelerated.

[0074] In a feasible implementation manner, the valve opening of the three-way valve is adjusted in step B11, which may include steps C11 to C13:

[0075] Step C11, determining the gas distribution ratio according to the target boost pressure and the high-pressure boost air.

[0076] Step C12, determining the target valve opening according to the gas distribution ratio.

[0077] Step C13, adjusting the valve opening of the three-way valve to the target valve opening.

[0078] It should be noted that when the current operating state of the engine is the second operating state, the boost pressure of the intake air needs to be reduced. At this time, the high-pressure boost air and the target boost pressure of the first channel are obtained, the target valve opening is determined by the high-pressure boost air and the target boost pressure, and the valve opening of the three-way valve is adjusted to the target valve opening. Under the above control conditions, the gas in the first channel is distributed to the second channel and the third channel according to a certain ratio, and the opening of the three-way valve is controlled to reduce the intake pressure to the target boost pressure.

[0079] In a feasible implementation manner, after step S03, step D11 may be included:

[0080] Step D11, when the current operating state is the shutdown state, control the exhaust bypass valve to open, control the second channel and the third channel to be connected, control the first channel to be disconnected, and control the engine throttle to be closed.

[0081] It should be noted that when the current operating state is the shutdown state, the engine throttle is controlled to be closed, the wastegate valve is opened, the three-way valve is controlled to close the first channel, the second channel is connected to the third channel, and the supercharger impeller stops rotating under air resistance, thereby avoiding the traditional turbocharger still maintaining high-speed rotation due to inertia after the engine is shut down, and there is no abnormal wear caused by oil lubrication. The pressurized gas in the pipeline is also discharged to the air filter through the second channel and the third channel, protecting the throttle and the supercharged pipeline. In this embodiment, in addition to the engine being in the shutdown state, when there is a rapid drop in engine load, such as sudden braking or sudden deceleration, the wastegate valve is also controlled to be opened, the second channel and the third channel are controlled to be connected, and the first channel is controlled to be disconnected.

[0082] In a feasible implementation, step S03 may include steps E11 to E14:

[0083] Step E11, when the throttle opening is a preset opening and the current engine speed is a preset speed, determining that the current operating state of the engine is a shutdown state.

[0084] It should be noted that the preset opening refers to zero in this embodiment, and the preset speed refers to zero in this embodiment. When the throttle opening is the preset opening and the current engine speed is the preset speed, or when any one of the conditions of the throttle opening being the preset opening and the current engine speed being the preset speed is met, the current operating state of the engine is determined to be the shutdown state. At the same time, the current operating state of the engine can also be determined to be the shutdown state under any of the following conditions: fuel injection stops, the ignition system is turned off, the oil pressure drops, and the coolant temperature gradually decreases. The shutdown state of the engine can also be determined by other means, and this embodiment does not limit this.

[0085] Step E12, when the throttle opening is not a preset opening and the current engine speed is not a preset speed, obtaining throttle opening change information.

[0086] It should be noted that when the throttle opening is not the preset opening and the current engine speed is not the preset speed, the throttle opening change sequence within the preset time period is obtained. In this embodiment, the throttle opening change sequence within the preset time period is the throttle opening change information.

[0087] Step E13, determining the throttle change state according to the throttle opening change information.

[0088] It should be noted that the change state of the throttle opening within a preset time period can be determined according to the throttle opening change information. In this embodiment, the throttle change state refers to the change state of the throttle opening within a preset time period, and the throttle change state includes an opening increase state and an opening decrease state.

[0089] Step E14, when the throttle valve change state is the opening degree reduction state, determining that the current operating state of the engine is the second operating state.

[0090] It should be noted that when the throttle valve change state is a state of decreasing opening, it means that the throttle valve opening decreases within a preset time period, and at this time, the current operating state of the engine is determined to be the second operating state. At the same time, the current operating state of the engine can also be determined to be the second operating state under any of the following conditions: a decrease in the amount of fuel injection, delayed ignition timing, or other methods to determine that the engine is in the second operating state, which is not limited in this embodiment.

[0091] This embodiment provides a turbocharger control method, which obtains the current operating information of the target vehicle; determines the current engine speed and throttle opening according to the current operating information; and determines the current operating state of the engine according to the current engine speed and throttle opening. In this way, the current operating state of the engine can be accurately identified, laying a foundation for the subsequent control of the turbocharger.

[0092] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the turbocharger control method of the present application. More simple transformations based on this technical concept are all within the protection scope of the present application.

[0093] This application also provides a turbocharger control device, please refer to Figure 5 , the turbocharger control device comprises:

[0094] The processing module 10 is used to determine the current engine speed when the current operating state of the engine is the first operating state.

[0095] The control module 20 is used to control the exhaust bypass valve to open, control the second channel to be connected to the third channel, and control the first channel to be disconnected when the current speed of the engine is less than the supercharger intervention speed.

[0096] Optionally, the processing module 10 is further used for:

[0097] When the current speed of the engine is greater than or equal to the supercharger intervention speed, the wastegate valve is controlled to be closed, the first channel and the second channel are controlled to be connected, and the third channel is controlled to be disconnected.

[0098] Optionally, the processing module 10 is further used for:

[0099] Acquire current operating information of the target vehicle; determine the current engine speed and throttle opening according to the current operating information; and determine the current operating state of the engine according to the current engine speed and throttle opening.

[0100] Optionally, the processing module 10 is further used for:

[0101] When the current operating state of the engine is the second operating state, the valve opening of the three-way valve is adjusted, the first channel, the second channel and the third channel are controlled to be connected, the exhaust bypass valve is controlled to open, and the valve opening of the exhaust bypass valve is adjusted.

[0102] Optionally, the processing module 10 is further used for:

[0103] Determine a gas distribution ratio according to a target boost pressure and high-pressure boost air; determine a target valve opening according to the gas distribution ratio; and adjust the valve opening of the three-way valve to the target valve opening.

[0104] Optionally, the processing module 10 is further used for:

[0105] When the current operating state is the shutdown state, the wastegate valve is controlled to be opened, the second channel and the third channel are controlled to be connected, the first channel is controlled to be disconnected, and the engine throttle is controlled to be closed.

[0106] Optionally, the processing module 10 is further used for:

[0107] When the throttle opening is a preset opening and the current engine speed is a preset speed, determine that the current operating state of the engine is a shutdown state; when the throttle opening is not a preset opening and the current engine speed is not a preset speed, obtain throttle opening change information; determine the throttle change state based on the throttle opening change information; when the throttle change state is an opening reduction state, determine that the current operating state of the engine is a second operating state.

[0108] The turbocharger control device provided by the present application adopts the turbocharger control method in the above embodiment, which can solve the technical problem in the prior art that in order to meet the low-speed lubrication requirements of the supercharger, the oil pump capacity is excessive and the engine fuel consumption increases. Compared with the prior art, the beneficial effects of the turbocharger control device provided by the present application are the same as the beneficial effects of the turbocharger control method provided by the above embodiment, and the other technical features in the turbocharger control device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0109] The present application provides a turbocharger control device, the turbocharger control device comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the turbocharger control method in the above-mentioned embodiment one.

[0110] Reference below Figure 6 , which shows a schematic diagram of the structure of a turbocharger control device suitable for implementing the embodiment of the present application. The turbocharger control device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 6 The turbocharger control device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0111] like Figure 6As shown, the turbocharger control device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In the RAM 1004, various programs and data required for the operation of the turbocharger control device are also stored. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems may be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 may allow the turbocharger control device to communicate wirelessly or wired with other devices to exchange data. Although the turbocharger control device with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have alternatively.

[0112] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0113] The turbocharger control device provided by the present application adopts the turbocharger control method in the above embodiment, which can solve the technical problem in the prior art that in order to meet the low-speed lubrication requirements of the supercharger, the oil pump capacity is excessive and the engine fuel consumption increases. Compared with the prior art, the beneficial effects of the turbocharger control device provided by the present application are the same as the beneficial effects of the turbocharger control method provided by the above embodiment, and the other technical features in the turbocharger control device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0114] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0115] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0116] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, wherein the computer-readable program instructions are used to execute the turbocharger control method in the above-mentioned embodiment.

[0117] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0118] The computer-readable storage medium may be included in the turbocharger control device; or may exist independently without being assembled into the turbocharger control device.

[0119] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the turbocharger control device, the turbocharger control device: determines the current engine speed when the current operating state of the engine is the first operating state; controls the exhaust bypass valve to open, controls the second channel and the third channel to be connected, and controls the first channel to be disconnected when the current engine speed is less than the supercharger intervention speed.

[0120] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0121] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0122] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0123] The readable storage medium provided by the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned turbocharger control method, and can solve the technical problem in the prior art that in order to meet the low-speed lubrication requirements of the supercharger, the oil pump capacity is excessive and the engine fuel consumption increases. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as the beneficial effects of the turbocharger control method provided by the above-mentioned embodiment, and will not be repeated here.

[0124] The present application also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the turbocharger control method as described above are implemented.

[0125] The computer program product provided by the present application can solve the technical problem in the prior art that in order to meet the low-speed lubrication requirements of the supercharger, the oil pump capacity is excessive and the engine fuel consumption increases. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the turbocharger control method provided by the above embodiment, and will not be repeated here.

[0126] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A turbocharger control method, characterized in that: The turbocharger includes a three-way valve, a turbocharger impeller, an intake intercooler, an air filter and an exhaust bypass valve, wherein a first channel of the three-way valve is connected to the turbocharger impeller, a second channel of the three-way valve is connected to the intake intercooler, and a third channel of the three-way valve is connected to an outlet end of the air filter through a pipeline. The turbocharger control method includes: When the current operating state of the engine is a first operating state, determining a current engine speed; When the current speed of the engine is less than the supercharger intervention speed, the wastegate valve is controlled to be opened, the second channel and the third channel are controlled to be connected, and the first channel is controlled to be disconnected.

2. The method according to claim 1, characterized in that After the step of determining the current speed of the engine when the current operating state is the first operating state, the method further includes: When the current speed of the engine is greater than or equal to the supercharger intervention speed, the wastegate valve is controlled to be closed, the first channel and the second channel are controlled to be connected, and the third channel is controlled to be disconnected.

3. The method according to claim 1, characterized in that When the current operating state of the engine is the first operating state, before the step of determining the current engine speed, the method further includes: Get the current operation information of the target vehicle; determining a current engine speed and a throttle opening according to the current operating information; The current operating state of the engine is determined according to the current engine speed and the throttle opening.

4. The method according to claim 3, characterized in that After the step of determining the current operating state of the engine according to the current engine speed and the throttle opening, the method further includes: When the current operating state of the engine is the second operating state, the valve opening of the three-way valve is adjusted, the first channel, the second channel and the third channel are controlled to be connected, the exhaust bypass valve is controlled to open, and the valve opening of the exhaust bypass valve is adjusted.

5. The method according to claim 4, characterized in that The step of adjusting the valve opening of the three-way valve comprises: determining a gas distribution ratio according to a target boost pressure and high-pressure boost air; determining a target valve opening according to the gas distribution ratio; The valve opening of the three-way valve is adjusted to the target valve opening.

6. The method according to claim 3, characterized in that After the step of determining the current operating state of the engine according to the current engine speed and the throttle opening, the method further includes: When the current operating state is the shutdown state, the wastegate valve is controlled to be opened, the second channel and the third channel are controlled to be connected, the first channel is controlled to be disconnected, and the engine throttle is controlled to be closed.

7. The method according to claim 3, characterized in that The step of determining the current operating state of the engine according to the current engine speed and the throttle opening comprises: When the throttle opening is a preset opening and the current engine speed is a preset speed, determining that the current operating state of the engine is a shutdown state; When the throttle opening is not a preset opening and the current engine speed is not a preset speed, acquiring throttle opening change information; determining a throttle change state according to the throttle opening change information; When the throttle valve change state is an opening degree reduction state, it is determined that the current operation state of the engine is a second operation state.

8. A turbocharger control device, characterized in that: The turbocharger control device comprises: a processing module, configured to determine a current engine speed when the current operating state of the engine is a first operating state; The control module is used to control the exhaust bypass valve to open, control the second channel to be connected to the third channel, and control the first channel to be disconnected when the current speed of the engine is less than the supercharger intervention speed.

9. A turbocharger control device, characterized in that: The turbocharger control device comprises: a memory, a processor, and a turbocharger control program stored in the memory and executable on the processor, wherein the turbocharger control program is configured to implement the turbocharger control method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores a turbocharger control program, and when the turbocharger control program is executed by the processor, the turbocharger control method according to any one of claims 1 to 7 is implemented.

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