Engine air supply system control method, device and system

Abstract

The application provides an engine air supply system control method, device and system. The method comprises the following steps: determining a current working condition of the engine; obtaining an exhaust gas recirculation (EGR) rate of the current working condition; if the EGR rate of the current working condition does not meet a preset EGR rate, obtaining a rotating speed of the engine, and controlling an air supply amount of an air supply pipeline and an opening degree of a double exhaust gas bypass valve according to the rotating speed of the engine, so as to adjust an air intake amount of the engine. The air intake amount of the engine can be adjusted, and the low fuel consumption performance of the engine can be realized while the high EGR rate is realized.

Description

Technical Field

[0001] This application relates to the field of engine control technology, and in particular to an engine air supply system control method, device and system. Background Technology

[0002] An internal combustion engine is a power machine that uses the heat energy released by burning fuel inside the machine to directly convert it into power. It has requirements for higher power density, lower fuel consumption and higher exhaust gas recirculation (EGR) rate.

[0003] Due to limitations in turbocharger matching and operating conditions, it is difficult for engines to achieve high EGR rates under certain operating conditions. Therefore, asymmetric turbocharging technology has been applied to balance the relationship between high EGR rate and high fuel consumption.

[0004] However, using an asymmetric turbocharging system to increase the EGR rate usually results in an increase in fuel consumption. Summary of the Invention

[0005] This application provides an engine air supply system control method, device, and system. By controlling and adjusting the air supply of the engine turbocharger system, it solves the problem of increased fuel consumption when the engine increases its EGR rate, which is common in the prior art.

[0006] In a first aspect, embodiments of this application provide an engine air supply system control method, wherein the engine air supply system includes an electronic control unit, a turbocharger, an air supply pipeline, and a dual exhaust gas bypass valve; the turbocharger is connected to the engine's intake pipeline through the air supply pipeline; and the turbocharger's outlet pipeline is connected to the dual exhaust gas bypass valve.

[0007] Under normal operating conditions, the electronic control unit controls the supercharger to adjust the compressed air supply, and controls the supercharger to send compressed air into the engine's intake manifold through the supply line, and controls the opening of the dual exhaust bypass valve; the method is applied to the electronic control unit, including:

[0008] Determine the current operating condition of the engine;

[0009] Obtain the exhaust gas recirculation (EGR) rate under the current operating conditions;

[0010] If the EGR rate under the current operating condition does not meet the preset EGR rate, the engine torque and speed are obtained, and the air supply volume of the air supply pipeline and the opening degree of the dual exhaust bypass valve are controlled according to the engine torque and speed to adjust the engine intake volume.

[0011] In one possible design, the supercharging device includes an asymmetric flow turbine, the turbine's vortex end comprising a small flow channel and a large flow channel; the engine air supply system includes: an EGR cooler, an EGR valve, and an intercooler; wherein the EGR cooler's inlet is connected to the engine's outlet pipe, and the EGR cooler's outlet is connected to the engine's inlet via the EGR valve; the intercooler's inlet is connected to the supercharging device's outlet, and the intercooler's outlet is connected to the engine's inlet pipe; the EGR valve's inlet is connected to the small flow channel's inlet; the EGR cooler and the EGR valve form a first air supply line; the intercooler forms a second air supply line; and the system further includes: a first bleed valve and a second bleed valve; wherein the first bleed valve's inlet is connected to the outlet pipe of the asymmetric flow turbine's small flow channel, the first bleed valve's inlet is connected to the engine's outlet pipe, the EGR valve's outlet ... The intake ports of the two bleed valves are connected to the exhaust pipe of the large flow channel of the asymmetric flow turbine; the first bleed valve and the second bleed valve form a dual exhaust gas bypass valve; the step of controlling the air supply volume of the air supply pipe and the opening degree of the dual exhaust gas bypass valve according to the engine speed to adjust the engine intake volume includes: if the engine speed is lower than the minimum speed corresponding to the engine's maximum torque, then controlling the EGR valve to open and controlling the dual exhaust gas bypass valve to close, so as to reduce the pumping loss pressure, thereby adjusting the engine's intake pressure and intake volume; if the engine speed is higher than the maximum speed corresponding to the engine's maximum torque, then determining whether the EGR valve is fully open; if the EGR valve is not fully open, then controlling the opening degree of the first bleed valve to increase and simultaneously controlling the opening degree of the second bleed valve to decrease, so as to reduce the pumping loss pressure, thereby adjusting the engine's intake pressure and intake volume.

[0012] In one possible design, the step of controlling the air supply volume of the air supply line and the opening degree of the dual exhaust bypass valves according to the engine speed to adjust the engine intake volume further includes: if the engine speed is equal to the maximum speed corresponding to the engine's maximum torque, then controlling the EGR valve to open and controlling the opening degree of the first bleed valve and the second bleed valve to increase, so as to reduce the turbine inlet pressure, thereby adjusting the engine intake pressure and intake volume.

[0013] In one possible design, determining the current operating condition of the engine includes: acquiring the output power and torque of the transmitter; and determining the current operating condition of the transmitter based on the output power and torque.

[0014] Secondly, embodiments of this application provide an engine air supply system control device, the engine air supply system including an electronic control unit, a turbocharger, an air supply pipeline and a dual exhaust gas bypass valve; the turbocharger is connected to the engine intake pipeline through the air supply pipeline; the exhaust pipeline of the turbocharger is connected to the dual exhaust gas bypass valve;

[0015] Under normal operating conditions, the electronic control unit controls the supercharger to adjust the compressed air supply, and controls the supercharger to send compressed air into the engine's intake manifold through the supply line, and controls the opening of the dual exhaust bypass valves; the device is applied to the electronic control unit; and includes:

[0016] A determination module is used to determine the current operating condition of the engine;

[0017] The acquisition module is used to obtain the exhaust gas recirculation (EGR) rate under the current operating conditions.

[0018] The control module is used to obtain the engine torque and speed if the EGR rate under the current operating condition does not meet the preset EGR rate, and control the air supply volume of the air supply pipeline and the opening degree of the dual exhaust bypass valve according to the engine torque and speed, so as to adjust the intake volume of the engine.

[0019] Thirdly, embodiments of this application provide an electronic control unit, including: at least one processor and a memory;

[0020] The memory stores computer-executed instructions;

[0021] The at least one processor executes computer execution instructions stored in the memory, causing the at least one processor to perform the engine air supply system control method as described in the first aspect and various possible designs of the first aspect.

[0022] Fourthly, embodiments of this application provide an engine air supply system, including: an electronic control unit, a booster, a main air supply pipeline, and a gas storage and supply pipeline; the booster is connected to the engine's intake pipeline through the main air supply pipeline and the gas storage and supply pipeline; under normal operating conditions, the electronic control unit controls the booster to adjust the compressed air supply volume, controls the booster to send compressed air into the engine's intake pipeline through the main air supply pipeline, and controls the gas storage and supply pipeline to close; the electronic control unit is used to execute the engine air supply system control method described in the first aspect and various possible designs of the first aspect.

[0023] Fifthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the engine air supply system control method described in the first aspect and various possible designs of the first aspect.

[0024] In a sixth aspect, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the engine air supply system control method described in the first aspect and various possible designs of the first aspect.

[0025] The engine air supply system control method, device, and system provided in this application embodiment determine the current operating condition of the engine and obtain the exhaust gas recirculation (EGR) rate of the current operating condition. If the EGR rate of the current operating condition does not meet the preset EGR rate, the engine torque and speed are obtained, and the air supply volume of the air supply pipeline and the opening degree of the dual exhaust bypass valve are controlled according to the engine torque and speed to adjust the engine intake volume, thereby achieving a high EGR rate while achieving low fuel consumption performance of the engine. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A comparison diagram of the inlet pressure and intake pressure of a certain engine in the prior art, provided for the embodiments of this application;

[0028] Figure 2 This is a schematic diagram of the system architecture of an engine air supply system provided in one embodiment of this application;

[0029] Figure 3 A schematic diagram of the system architecture of an engine air supply system provided in another embodiment of this application;

[0030] Figure 4 This is a schematic flowchart of an engine air supply system control method provided in one embodiment of this application;

[0031] Figure 5 A flowchart illustrating an engine air supply system control method provided in another embodiment of this application;

[0032] Figure 6 This is a schematic diagram of the structure of an engine air supply system control device provided in one embodiment of this application;

[0033] Figure 7 This is a schematic diagram of the hardware structure of an electronic control unit provided in one embodiment of this application. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] An internal combustion engine is a power machine that converts the heat energy released by burning fuel inside the machine into power. It demands higher power density, lower fuel consumption, and a higher exhaust gas recirculation (EGR) rate. However, due to turbocharger matching and operating condition limitations, it is difficult to achieve a high EGR rate under certain engine operating conditions. Therefore, asymmetric turbocharging technology is used to balance the relationship between high EGR rate and high fuel consumption. However, using an asymmetric turbocharging system to increase the EGR rate usually results in an increase in fuel consumption. Figure 1 A comparison diagram of the turbine inlet pressure and intake pressure of a certain engine in the prior art, provided for embodiments of this application, showing the external characteristics of a small / large flow channel engine. Figure 1 As can be seen from the comparison, when the engine speed is higher than 1700 r / min, the pressure in front of the large flow channel is higher than the intake pressure, resulting in large pumping losses and deteriorating fuel consumption.

[0036] To address the aforementioned technical problems, this application provides the following technical solution: by controlling the air supply volume of the air supply pipeline and the opening degree of the dual exhaust bypass valve, the intake volume of the engine can be adjusted to achieve a high EGR rate while simultaneously achieving low fuel consumption performance of the engine.

[0037] Figure 2 This is a schematic diagram of the system architecture of an engine air supply system provided in one embodiment of this application. Figure 2 As shown, the engine air supply system provided in this embodiment includes: an electronic control unit 10, a turbocharger 20, an air supply line 30, and a dual exhaust gas bypass valve 40. The turbocharger 20 is connected to the intake line 501 of the engine 50 through the air supply line 30. The exhaust line of the turbocharger 20 is connected to the dual exhaust gas bypass valve 40.

[0038] The electronic control unit 10 can be any type of controller, such as a microcontroller or a single-chip microcomputer.

[0039] Under normal operating conditions, the electronic control unit 10 controls the supercharger 20 to adjust the compressed air supply, and controls the supercharger 20 to send compressed air into the intake manifold 501 of the engine 50 through the air supply line 30, and controls the opening of the dual exhaust bypass valve 40. Here, the electronic control unit 10 can adjust the compressed air supply by controlling the valve opening of the supercharger 20 and the opening of the dual exhaust bypass valve 40 according to the collected engine torque and speed.

[0040] Among them, the booster device 20 can be an asymmetric flow channel booster. Figure 2 Taking the asymmetric flow channel turbocharger as an example: the turbocharger 20 includes an asymmetric flow channel turbine 201 and a compressor 202.

[0041] The air inlet of turbine 201 is connected to the first exhaust pipe 502 of engine 50, and the air outlet of turbine 201 is connected to the aftertreatment system. Turbine 201 is driven by the exhaust gas discharged from the first exhaust pipe 502 of engine 50, which drives compressor 202 to compress air and delivers the compressed air into the intake pipe 501 of engine 50 through the main air supply pipe 30.

[0042] The working principle of an asymmetric flow channel turbocharger is as follows: the turbocharger vortex end has one large and one small flow channel. The small flow channel is used to drive the EGR, while the large flow channel ensures the turbocharger efficiency and provides the engine with a sufficient air-fuel ratio.

[0043] Figure 3 This is a schematic diagram of the system architecture of an engine air supply system provided for another embodiment of this application. (See diagram below.) Figure 3 As shown, in Figure 2 Based on the embodiments, it is known that the supercharging device 20 includes an asymmetric flow turbine 201 and a compressor 202, and the turbine end of the asymmetric flow turbine 201 includes a small flow channel and a large flow channel. The engine air supply system provided in this embodiment includes: an EGR cooler 304, an EGR valve 305, and an intercooler 306; wherein the air inlet of the EGR cooler 304 is connected to the second exhaust pipe 503 of the engine, and the air outlet of the EGR cooler 304 is connected to the air inlet 501 of the engine through the EGR valve 305; the air inlet of the intercooler 306 is connected to the exhaust port of the supercharging device 20, and the air outlet of the intercooler 306 is connected to the exhaust pipe 501 of the engine; the air inlet of the EGR valve 305 is connected to the air inlet of the small flow channel; the EGR cooler and the EGR valve 305 form the first air supply pipe 301; the intercooler 306 forms the second air supply pipe 302.

[0044] The engine air supply system also includes: a first bleed valve 401 and a second bleed valve 402; wherein the inlet of the first bleed valve 401 is connected to the outlet pipe of the small flow channel of the asymmetric flow turbine 201, and the inlet of the second bleed valve 402 is connected to the outlet pipe of the large flow channel of the asymmetric flow turbine 201; the first bleed valve 401 and the second bleed valve 402 form a dual exhaust bypass valve 40.

[0045] Figure 4 This is a flowchart illustrating an engine air supply system control method according to an embodiment of this application. The execution entity in this embodiment can be... Figure 2 or Figure 3 The electronic control unit (ECU) in the illustrated embodiment. Under normal operating conditions, the ECU controls the supercharger to adjust the compressed air supply, and controls the supercharger to deliver compressed air into the engine's intake manifold through the supply line, and controls the opening degree of the dual exhaust bypass valves. In this embodiment, the method includes:

[0046] S201: Determine the current operating condition of the engine.

[0047] In this example, determining the current operating condition of the engine includes: acquiring the output power and torque of the transmitter; and determining the current operating condition of the transmitter based on the output power and torque.

[0048] Specifically, the output power and torque of an engine at different speeds can reflect its performance, and therefore the current operating condition of the engine can be determined based on the output power and torque.

[0049] S202: Obtain the EGR rate for the current operating condition.

[0050] In this embodiment, EGR refers to the process of reintroducing exhaust gas from the engine into the intake manifold to mix with fresh air before entering the combustion chamber for combustion. This effectively reduces NOx emissions from the engine. The EGR rate is defined as the ratio of the amount of recirculated exhaust gas to the total amount of intake air drawn into the cylinder. Proper control of the EGR rate is crucial for the purification effect of nitrogen oxides and overall engine emissions. Quantifying the EGR rate allows for the assessment of the impact of exhaust gas recirculation on engine performance. In this embodiment, the EGR rate of the engine under the current operating conditions is obtained, given that the engine's current operating conditions are determined.

[0051] S203: Determine whether the EGR rate of the current operating condition meets the preset EGR rate. If not, proceed to step S204.

[0052] S204: Obtains the engine's torque and speed, and controls the air supply volume of the air supply line and the opening of the dual exhaust bypass valves based on the engine's torque and speed to adjust the engine's intake air volume.

[0053] In this embodiment, the gas supply pipeline includes a first gas supply pipeline and a second gas supply pipeline, and the dual waste gas bypass valve includes a first vent valve and a second vent valve.

[0054] Specifically, the gas supply volume of the gas supply pipeline is controlled by controlling the gas supply volume of the first gas supply pipeline and the second gas supply pipeline, and the opening degree of the dual waste gas bypass valve is controlled by controlling the opening degree of the first vent valve and the second vent valve.

[0055] In summary, this embodiment determines the current operating condition of the engine and obtains the exhaust gas recirculation (EGR) rate under the current operating condition. If the EGR rate under the current operating condition does not meet the preset EGR rate, the engine torque and speed are obtained, and the air supply volume of the air supply pipeline and the opening of the dual exhaust bypass valves are controlled according to the engine torque and speed to adjust the engine intake volume, thereby achieving a high EGR rate while achieving low fuel consumption performance of the engine.

[0056] refer to Figure 5 , Figure 5 This is a flowchart illustrating an engine air supply system control method according to another embodiment of this application. The execution entity in this embodiment can be... Figure 2 or Figure 3 The electronic control unit in the illustrated embodiment. The supercharging device includes an asymmetric flow turbine, the turbine's vortex end including a small flow channel and a large flow channel. The engine air supply system includes: an EGR cooler, an EGR valve, and an intercooler; wherein the EGR cooler's inlet is connected to the engine's outlet pipe, and the EGR cooler's outlet is connected to the engine's inlet via the EGR valve; the intercooler's inlet is connected to the supercharging device's outlet, and the intercooler's outlet is connected to the engine's inlet pipe; the EGR valve's inlet is connected to the small flow channel's inlet; the EGR cooler and EGR valve form a first air supply line; the intercooler forms a second air supply line. The engine air supply system also includes: a first bleed valve and a second bleed valve; wherein the first bleed valve's inlet is connected to the outlet pipe of the small flow channel of the asymmetric flow turbine, and the second bleed valve's inlet is connected to the outlet pipe of the large flow channel of the asymmetric flow turbine; the first bleed valve and the second bleed valve form a dual exhaust bypass valve. Figure 5 As shown, the method includes:

[0057] S401: Obtain the engine speed.

[0058] S402: Determine whether the engine speed is lower than the minimum speed corresponding to the engine's maximum torque. If so, proceed to step S403.

[0059] In this embodiment, the maximum torque of the engine corresponds to a series of engine speeds at that torque. For example, when the maximum torque of the engine is 200, the engine speed range at that torque is 1200 to 1600. That is, the maximum engine speed corresponding to the maximum torque of 200 is 1600, and the minimum engine speed corresponding to the maximum torque of 200 is 1200.

[0060] S403: Controls the opening of the EGR valve and the closing of the dual exhaust bypass valve to reduce pumping pressure loss, thereby adjusting the engine's intake pressure and intake volume.

[0061] S404: Determine whether the engine speed is higher than the maximum speed corresponding to the engine's maximum torque. If yes, proceed to step S405; otherwise, proceed to step S407.

[0062] S405: Determine whether the EGR valve is fully open. If not, proceed to step S406.

[0063] In this embodiment, the opening degree of the EGR valve is divided into fully open and partially open states. If it is not fully open, it means that the opening degree of the EGR valve is not partially open.

[0064] S406: Controls the opening of the first bleed valve to increase, while simultaneously controlling the opening of the second bleed valve to decrease, in order to reduce pumping pressure loss and thereby adjust the engine's intake pressure and intake volume.

[0065] S407: Determine whether the engine speed is equal to the maximum speed corresponding to the engine's maximum torque. If so, proceed to step S408.

[0066] S408: The EGR valve opens, controlling the opening degree of the first and second bleed valves to increase, thereby reducing the turbine inlet pressure and adjusting the engine's intake pressure and intake volume.

[0067] In summary, this embodiment regulates the engine's intake air volume by coordinating the adjustment of the EGR valve, the first bleed valve, the second bleed valve, and the bleed valve, thereby achieving the goal of controlling the EGR rate while ensuring the engine's low fuel consumption performance.

[0068] Figure 6 This is a schematic diagram of the structure of an engine air supply system control device provided in one embodiment of this application. The engine air supply system includes an electronic control unit (ECU), a turbocharger, an air supply pipeline, and a dual exhaust gas bypass valve. The turbocharger is connected to the engine's intake pipeline via the air supply pipeline; the turbocharger's outlet pipeline is connected to the dual exhaust gas bypass valve. Under normal operating conditions, the ECU controls the turbocharger to adjust the compressed air supply volume, controls the turbocharger to deliver compressed air to the engine's intake pipeline via the air supply pipeline, and controls the opening degree of the dual exhaust gas bypass valve. The method is applied to the ECU; for example... Figure 6 As shown, the engine air supply system control device 70 includes:

[0069] The determination module 701 is used to determine the current operating condition of the engine;

[0070] The acquisition module 702 is used to acquire the exhaust gas recirculation (EGR) rate under the current operating conditions.

[0071] The control module 703 is used to obtain the engine torque and speed if the current EGR rate does not meet the preset EGR rate, and control the air supply volume of the air supply pipeline and the opening degree of the dual exhaust bypass valve according to the engine torque and speed, so as to adjust the engine intake volume.

[0072] In one possible design, the supercharging device includes an asymmetric flow turbine, the turbine's vortex end comprising a small flow channel and a large flow channel. The engine air supply system includes: an EGR cooler, an EGR valve, and an intercooler; wherein the EGR cooler's inlet is connected to the engine's outlet pipe, and the EGR cooler's outlet is connected to the engine's inlet via the EGR valve; the intercooler's inlet is connected to the supercharging device's outlet, and the intercooler's outlet is connected to the engine's inlet pipe; the EGR valve's inlet is connected to the small flow channel's inlet; the EGR cooler and the EGR valve form a first air supply line; and the intercooler forms a second air supply line. The engine air supply system further includes: a first bleed valve and a second bleed valve; wherein the inlet of the first bleed valve is connected to the outlet pipe of the small flow channel of the asymmetric flow turbine, and the inlet of the second bleed valve is connected to the outlet pipe of the large flow channel of the asymmetric flow turbine; the first bleed valve and the second bleed valve form a dual exhaust gas bypass valve. The control module 703 is specifically used to control the EGR valve to open and the dual exhaust gas bypass valve to close if the engine speed is lower than the minimum speed corresponding to the engine's maximum torque, thereby reducing pumping loss pressure and adjusting the engine's intake pressure and intake volume; if the engine speed is higher than the maximum speed corresponding to the engine's maximum torque, it determines whether the EGR valve is fully open; if the EGR valve is not fully open, it controls the opening of the first bleed valve to increase and simultaneously controls the opening of the second bleed valve to decrease, thereby reducing pumping loss pressure and adjusting the engine's intake pressure and intake volume.

[0073] In one possible design, the control module 703 is also specifically used to control the EGR valve to open and increase the opening degree of the first and second bleed valves if the engine speed is equal to the maximum speed corresponding to the engine's maximum torque, thereby reducing the turbine inlet pressure and adjusting the engine's intake pressure and intake volume.

[0074] In one possible design, module 701 is specifically used to acquire the output power and torque of the transmitter; and to determine the current operating condition of the transmitter based on the output power and torque.

[0075] The apparatus provided in this embodiment can be used to execute the technical solutions of the above method embodiments. Its implementation principle and technical effects are similar, and will not be described again here.

[0076] Figure 7 This is a schematic diagram of the hardware structure of an electronic control unit provided in one embodiment of this application. Figure 7 As shown, the electronic control unit 60 of this embodiment includes: at least one processor 601 and a memory 602; wherein

[0077] Memory 602 is used to store instructions executed by the computer;

[0078] The processor 601 is used to execute computer execution instructions stored in the memory to implement the various steps performed by the electronic control unit in the above embodiments. For details, please refer to the relevant descriptions in the foregoing method embodiments.

[0079] Alternatively, the memory 602 can be either standalone or integrated with the processor 601.

[0080] When the memory 602 is set up independently, the electronic control unit also includes a bus 603 for connecting the memory 602 and the processor 601.

[0081] This application also provides a computer-readable storage medium storing computer-executable instructions. When a processor executes the computer-executable instructions, the above-described engine air supply system control method is implemented.

[0082] The electronic control unit can be any type of controller, such as an electronic control unit (ECU).

[0083] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described engine air supply system control method.

[0084] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or modules, and may be electrical, mechanical, or other forms.

[0085] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to implement the solution of this embodiment according to actual needs.

[0086] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing unit, or each module can exist physically separately, or two or more modules can be integrated into one unit. The unit composed of the above modules can be implemented in hardware or in the form of hardware plus software functional units.

[0087] The integrated modules described above, implemented as software functional modules, can be stored in a computer-readable storage medium. These software functional modules, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods of the various embodiments of this application.

[0088] It should be understood that the aforementioned processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly manifested as execution by a hardware processor, or execution by a combination of hardware and software modules within the processor.

[0089] The memory may include high-speed RAM, and may also include non-volatile storage (NVM), such as at least one disk storage device, and may also be a USB flash drive, external hard drive, read-only memory, disk or optical disc, etc.

[0090] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0091] The aforementioned storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0092] An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. Alternatively, the storage medium can be an integral part of the processor. The processor and storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and storage medium can exist as discrete components in an electronic control unit or main control device.

[0093] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A control method for an engine air supply system, characterized in that, The engine air supply system includes an electronic control unit, a turbocharger, an air supply line, an EGR valve, and a dual exhaust gas bypass valve; the turbocharger is connected to the engine's intake line through the air supply line; the turbocharger's exhaust line is connected to the dual exhaust gas bypass valve; the dual exhaust gas bypass valve consists of a first vent valve and a second vent valve. Under normal operating conditions, the electronic control unit controls the supercharger to adjust the compressed air supply, and controls the supercharger to send compressed air into the engine's intake pipe through the air supply line, and controls the opening of the dual exhaust bypass valve. The method is applied to an electronic control unit, including: Determine the current operating condition of the engine; Obtain the exhaust gas recirculation (EGR) rate under the current operating conditions; If the EGR rate under the current operating condition does not meet the preset EGR rate, the engine speed is obtained, and the air supply volume of the air supply pipeline and the opening of the dual exhaust bypass valve are controlled according to the engine speed to adjust the intake volume of the engine. The step of controlling the air supply volume of the air supply pipeline and the opening degree of the dual exhaust bypass valves according to the engine speed to adjust the engine's intake air volume includes: If the engine speed is lower than the minimum speed corresponding to the engine's maximum torque, the EGR valve is opened and the dual exhaust bypass valve is closed to reduce pumping pressure loss, thereby adjusting the engine's intake pressure and intake volume. If the engine speed is higher than the maximum speed corresponding to the engine's maximum torque, then determine whether the EGR valve is fully open. If the EGR valve is not fully open, the opening of the first vent valve is increased while the opening of the second vent valve is decreased to reduce pumping pressure loss, thereby adjusting the engine's intake pressure and intake volume. If the engine speed is equal to the maximum speed corresponding to the engine's maximum torque, the EGR valve is opened, and the opening of the first and second bleed valves is increased to reduce the turbine inlet pressure, thereby adjusting the engine's intake pressure and intake volume.

2. The method according to claim 1, characterized in that, The pressurization device includes an asymmetric flow channel turbine, wherein the turbine tip includes a small flow channel and a large flow channel. The engine air supply system includes: The engine air supply system includes an EGR cooler and an intercooler; wherein the inlet of the EGR cooler is connected to the engine's outlet pipe, and the outlet of the EGR cooler is connected to the engine's inlet via the EGR valve; the inlet of the intercooler is connected to the outlet of the turbocharger, and the outlet of the intercooler is connected to the engine's inlet pipe; the inlet of the EGR valve is connected to the inlet of the small flow channel; the EGR cooler and the EGR valve form a first air supply line; the intercooler forms a second air supply line. The inlet of the first vent valve is connected to the outlet pipe of the small flow channel of the asymmetric flow channel turbine, and the inlet of the second vent valve is connected to the outlet pipe of the large flow channel of the asymmetric flow channel turbine.

3. The method according to claim 1 or 2, characterized in that, Determining the current operating condition of the engine includes: Obtain the output power and torque of the transmitter; The current operating condition of the transmitter is determined based on the output power and torque.

4. A control device for an engine air supply system, characterized in that, The engine air supply system includes an electronic control unit, a turbocharger, an air supply line, an EGR valve, and a dual exhaust gas bypass valve; the turbocharger is connected to the engine's intake line through the air supply line; the turbocharger's exhaust line is connected to the dual exhaust gas bypass valve; the dual exhaust gas bypass valve consists of a first vent valve and a second vent valve. Under normal operating conditions, the electronic control unit controls the supercharger to adjust the compressed air supply, and controls the supercharger to send compressed air into the engine's intake pipe through the air supply line, and controls the opening of the dual exhaust bypass valve. The device is applied to an electronic control unit; it includes: A determination module is used to determine the current operating condition of the engine; The acquisition module is used to obtain the exhaust gas recirculation (EGR) rate under the current operating conditions. The control module is used to obtain the engine torque and speed if the EGR rate under the current operating condition does not meet the preset EGR rate, and control the air supply volume of the air supply pipeline and the opening degree of the dual exhaust bypass valve according to the engine torque and speed, so as to adjust the intake volume of the engine. The control module is specifically configured to: if the engine speed is lower than the minimum speed corresponding to the engine's maximum torque, control the EGR valve to open and control the dual exhaust bypass valve to close, thereby reducing pumping pressure loss and adjusting the engine's intake pressure and intake volume; if the engine speed is higher than the maximum speed corresponding to the engine's maximum torque, determine whether the EGR valve is fully open; if the EGR valve is not fully open, control the opening of the first bleed valve to increase and simultaneously control the opening of the second bleed valve to decrease, thereby reducing pumping pressure loss and adjusting the engine's intake pressure and intake volume; if the engine speed is equal to the maximum speed corresponding to the engine's maximum torque, control the EGR valve to open and control the opening of the first and second bleed valves to increase, thereby reducing turbine inlet pressure and adjusting the engine's intake pressure and intake volume.

5. An electronic control unit, characterized in that, include: At least one processor and memory; The memory stores computer-executed instructions; The at least one processor executes computer execution instructions stored in the memory, causing the at least one processor to perform the engine air supply system control method as described in any one of claims 1 to 3.

6. An engine air supply system, characterized in that, include: The system includes an electronic control unit, a turbocharger, an air supply line, an EGR valve, and a dual exhaust gas bypass valve; the turbocharger is connected to the engine's intake line via the air supply line; the turbocharger's exhaust line is connected to the dual exhaust gas bypass valve; the dual exhaust gas bypass valve consists of a first vent valve and a second vent valve. Under normal operating conditions, the electronic control unit controls the supercharger to adjust the compressed air supply, and controls the supercharger to send compressed air into the engine intake pipe through the air supply pipeline, and controls the opening of the dual exhaust bypass valve; the electronic control unit is used to execute the engine air supply system control method as described in any one of claims 1 to 3.

7. The engine air supply system according to claim 6, characterized in that, The supercharging device includes an asymmetric flow turbine, the turbine's vortex end comprising a small flow channel and a large flow channel; the engine air supply system includes: an EGR cooler, an EGR valve, and an intercooler; wherein the EGR cooler's inlet is connected to the engine's outlet pipe, and the EGR cooler's outlet is connected to the engine's inlet via the EGR valve; the intercooler's inlet is connected to the supercharging device's outlet, and the intercooler's outlet is connected to the engine's inlet pipe; the EGR valve's inlet is connected to the small flow channel's inlet; the EGR cooler and the EGR valve form a first air supply line; the intercooler forms a second air supply line; The inlet of the first vent valve is connected to the outlet pipe of the small flow channel of the asymmetric flow channel turbine, and the inlet of the second vent valve is connected to the outlet pipe of the large flow channel of the asymmetric flow channel turbine; the first vent valve and the second vent valve form a dual waste gas bypass valve.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, implement the engine air supply system control method as described in any one of claims 1 to 3.

9. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the engine air supply system control method according to any one of claims 1 to 3.

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