Exhaust treatment system, exhaust treatment method, controller, storage medium and vehicle

Abstract

The present invention discloses an exhaust treatment system, an exhaust treatment method, a controller, a storage medium, and a vehicle, comprising: an intake line for connecting to an engine's intake valve; an exhaust line for connecting to an engine's exhaust valve; an electronic supercharger disposed in the intake line; an electrically heated catalyst disposed in the exhaust line; an electrically variable valve timing system for being disposed in the engine's valve mechanism; and a control module connected to the electronic supercharger, the electrically heated catalyst, and the electrically variable valve timing system, respectively, for detecting the crankshaft phase of the engine when it is stopped; and controlling the electrically variable valve timing system based on the crankshaft phase to adjust the opening timing of the intake and exhaust valves to form a preset valve overlap angle. Under the action of the electronic supercharger, the valve overlap angle is utilized to increase the exhaust gas flow rate to the electrically heated catalyst, allowing the catalyst inside the electrically heated catalyst to reach the operating temperature, thereby reducing harmful gas emissions.

Description

Technical Field

[0001] The present invention relates to the field of exhaust gas treatment, and in particular to an exhaust gas treatment system, an exhaust gas treatment method, a controller, a storage medium and a vehicle. Background Art

[0002] In modern vehicles, catalysts are crucial for reducing exhaust emissions. However, during cold engine starts, the catalysts are too cold to effectively convert pollutants, leading to high emissions of harmful substances such as carbon monoxide, nitrogen oxides, and hydrocarbons.

[0003] Existing solutions rely primarily on catalyst light-off conditions established during engine performance development, utilizing exhaust heat to naturally heat the catalyst. However, this process is slow to respond and places high demands on engine exhaust heat flux, particularly at low speeds and low loads, which can lead to high noise, vibration, and harshness (NVH) levels.

[0004] Therefore, how to make the catalyst quickly reach the operating temperature after the vehicle is started and reduce harmful gas emissions has become a technical problem that needs to be solved urgently. Summary of the Invention

[0005] Embodiments of the present invention provide an exhaust gas treatment system, an exhaust gas treatment method, a controller, a storage medium, and a vehicle to solve the technical problem that after starting a conventional vehicle, the catalyst cannot quickly reach the operating temperature, resulting in high harmful gas emissions.

[0006] In a first aspect, an exhaust gas treatment system is provided, the exhaust gas treatment system comprising:

[0007] An intake pipe, used to connect to the intake valve of the engine;

[0008] an exhaust pipe, used to be connected to an exhaust valve of the engine;

[0009] an electronic supercharger, disposed in the intake pipe;

[0010] an electrically heated catalyst, disposed in the exhaust pipe;

[0011] an electrically variable valve timing system, for being provided in the valve train of the engine;

[0012] A control module is connected to the electronic supercharger, the electrically heated catalyst, and the electrically variable valve timing system, and is used to:

[0013] detecting a crankshaft phase of the engine in a stopped state;

[0014] According to the crankshaft phase, the electric variable valve timing system is controlled to adjust the opening timing of the intake valve and the exhaust valve to form a preset valve overlap angle. Under the action of the electronic supercharger, the valve overlap angle is utilized to increase the exhaust flow rate flowing to the electrically heated catalyst, so that the catalyst inside the electrically heated catalyst reaches the operating temperature.

[0015] In one embodiment, the electrically variable valve timing system includes an electrically variable intake valve timing system and an electrically variable exhaust valve timing system;

[0016] The electrically variable intake valve timing system and the electrically variable exhaust valve timing system are both provided in the valve mechanism.

[0017] In one embodiment, the exhaust gas treatment system further comprises:

[0018] a post-processing module, disposed in the exhaust pipe, for further purifying the exhaust gas after being treated by the electrically heated catalyst;

[0019] a muffler, disposed in the exhaust pipe;

[0020] Wherein, the electrically heated catalyst, the post-processing module and the muffler are arranged in sequence along the exhaust direction.

[0021] In one embodiment, the exhaust gas treatment system further comprises:

[0022] an exhaust bypass line connected to the exhaust line, with an inlet of the exhaust bypass line being arranged between the post-processing module and the muffler;

[0023] The electronic valve is arranged in the exhaust bypass pipeline.

[0024] In a second aspect, an exhaust gas treatment method is provided, which is applied to the exhaust gas treatment system described in the first aspect. The method includes:

[0025] Detect the crankshaft phase when the engine is stopped;

[0026] According to the crankshaft phase, the electric variable valve timing system is controlled to adjust the opening timing of the intake valve and the exhaust valve to form a preset valve overlap angle. Under the action of the electronic supercharger, the valve overlap angle is utilized to increase the exhaust flow rate flowing to the electrically heated catalyst, so that the catalyst inside the electrically heated catalyst reaches the operating temperature.

[0027] In one embodiment, after controlling the electrically variable valve timing system according to the crankshaft phase to adjust the opening timings of the intake valve and the exhaust valve, the method further includes:

[0028] Get ambient temperature, exhaust back pressure and exhaust temperature;

[0029] dynamically adjusting the opening of the electronic valve according to the ambient temperature, the valve overlap angle, and the exhaust back pressure so as to maintain the exhaust back pressure within a target range;

[0030] dynamically adjusting the power of the electrically heated catalyst according to the ambient temperature, the valve overlap angle, the exhaust back pressure, and the exhaust temperature;

[0031] The valve overlap angle and / or the power of the electronic supercharger are dynamically adjusted according to the ambient temperature.

[0032] In one embodiment, dynamically adjusting the valve overlap angle and / or the power of the electronic supercharger according to the ambient temperature includes:

[0033] When the ambient temperature is within a first preset temperature range, adjusting the valve overlap angle according to a first preset overlap angle adjustment value, and / or adjusting the power of the electronic supercharger according to a first preset power adjustment value;

[0034] When the ambient temperature is within a second preset temperature range, adjusting the valve overlap angle according to a second preset overlap angle adjustment value, and / or adjusting the power of the electronic supercharger according to a second preset power adjustment value;

[0035] When the ambient temperature is within a third preset temperature range, the valve overlap angle is adjusted according to a third preset overlap angle adjustment value, and / or the power of the electronic supercharger is adjusted according to a third preset power adjustment value.

[0036] In a third aspect, a controller is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the exhaust treatment method described in the second aspect when executing the computer program.

[0037] In a fourth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the exhaust gas treatment method described in the second aspect is implemented.

[0038] In a fifth aspect, a vehicle is provided, wherein the vehicle includes the exhaust treatment system described in the first aspect, or the vehicle includes the controller described in the third aspect.

[0039] In one solution implemented by the above-mentioned exhaust treatment system, exhaust treatment method, controller, storage medium and vehicle, an electronic supercharger is provided in the intake duct and an electrically heated catalyst is provided in the exhaust duct, and the electric variable valve timing system and the control module are combined for coordinated control. The control module is able to control the electric variable valve timing system by detecting the crankshaft phase when the engine is stopped, adjust the opening timing of the intake valve and the exhaust valve, form a preset valve overlap angle, and under the action of the electronic supercharger, utilize the valve overlap angle to enable the exhaust gas to quickly and effectively enter the exhaust duct and the electrically heated catalyst, thereby enabling the electrically heated catalyst to quickly increase the temperature of the internal catalyst, shorten the lag time of exhaust purification, improve the catalyst working efficiency during the engine cold start phase, effectively reduce harmful gas emissions during the engine cold start phase, and improve noise, vibration and harshness (NVH) performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0041] Figure 1 is a system schematic diagram of an exhaust treatment system in one embodiment of the present application;

[0042] Figure 2 This is a flow chart of an exhaust treatment method according to an embodiment of the present application;

[0043] Figure 3 It is a structural diagram of a controller in one embodiment of the present application.

[0044] Among them, the reference numerals in the figures are:

[0045] 1-Intake pipe, 2-Electronic supercharger, 3-Electronic variable intake valve timing system, 4-Engine, 5-Electronic variable exhaust valve timing system, 6-Electrically heated catalyst, 7-After-treatment module, 8-Exhaust pipe, 9-Exhaust bypass pipe, 10-Electronic valve, 11-Control module, 12-Muffler. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0048] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0050] Please also refer to Figures 1 to 3 The exhaust gas treatment system, exhaust gas treatment method, controller, storage medium, and vehicle provided by the embodiments of the present invention are now described. For ease of understanding, the above aspects are described one by one below.

[0051] A. Exhaust treatment system

[0052] In one embodiment, if Figure 1 As shown, an exhaust treatment system is provided, comprising an intake pipe 1, an exhaust pipe 8, an electronic supercharger 2 (EHC), an electrically variable valve timing (VVT) system, and a control module 11. Specifically, one end of the intake pipe 1 is connected to the intake valve of the engine 4, and one end of the exhaust pipe 8 is connected to the exhaust valve of the engine 4. The electronic supercharger 2 is disposed within the intake pipe 1 to increase the intake pressure. The electrically heated catalyst 6 is disposed within the exhaust pipe 8 to heat the exhaust gas and thereby increase the catalyst's operating temperature. The electrically variable valve timing system is disposed within the valve structure of the engine 4 to control the opening and closing timing of the engine 4's intake and exhaust valves. The control module 11 is respectively connected to the electronic supercharger 2, the electrically heated catalyst 6, and the electrically variable valve timing system to coordinately control the electronic supercharger 2, the electrically heated catalyst 6, and the electrically variable valve timing system, so that the exhaust gas can flow into the combustion chamber of the engine 4 in a timely and smooth manner and enter the electrically heated catalyst 6 through the exhaust valve for heating treatment.

[0053] It can be seen from this embodiment that after the vehicle is started, the control module 11 of the present application detects the crankshaft phase of the engine 4 in the shutdown state, and controls the electric variable valve timing system according to the detected crankshaft phase, adjusts the opening timing of the intake valve and the exhaust valve, and forms a preset valve overlap angle, ensuring that during the exhaust process, there is a certain overlapping period between the intake valve and the exhaust valve, that is, when the intake valve is open, the exhaust valve is not closed, and under the action of the electronic supercharger 2, the valve overlap angle is used to enable the exhaust gas to enter the electric heating catalyst 6 for heating treatment in time, and further enable the catalyst inside the electric heating catalyst 6 to reach the ignition temperature earlier, thereby promoting the efficient operation of the catalyst, thereby shortening the heating time of the catalyst, thereby improving the efficiency of exhaust after-treatment and reducing harmful emissions.

[0054] In one embodiment, the electronic supercharger 2 can be fixed in the intake pipe 1 by means of flanges, bolts or welding, and the electrically heated catalyst 6 can also be fixed in the exhaust pipe 8 by means of flanges, bolts or welding, which does not constitute a limitation of the present invention.

[0055] In one embodiment, a gear mechanism is externally disposed on the valve structure, which is configured to connect to a valve actuator. The valve actuator includes an actuator and a drive gear, with the actuator connected to the drive gear. As an example, the electric variable valve timing system can be directly assembled in the valve train of the engine 4 and located above the cylinder head. The electric variable valve timing system can control the actuator in the valve actuator via the gear mechanism external to the valve structure, thereby causing the actuator to drive the gear, thereby adjusting the opening and closing timing of the intake and exhaust valves.

[0056] In one embodiment, the electrically heated catalyst 6 includes an electric heating element and a catalyst material layer, which is disposed behind the electric heating element. The electric heating element uniformly heats the exhaust gas, raising its temperature to the temperature range required for the catalytic reaction. The catalyst material layer is coated with a precious metal catalyst, such as platinum, palladium, and rhodium. These precious metal catalysts can effectively promote the chemical reaction of harmful substances such as carbon monoxide, hydrocarbons, and nitrogen oxides, converting them into harmless carbon dioxide, water, and nitrogen, thereby reducing the pollutant content in exhaust emissions.

[0057] In one embodiment, the electrically variable valve timing system includes an electrically variable intake valve timing system 3 and an electrically variable exhaust valve timing system 5, both of which are disposed within the valve train. Specifically, the electrically variable intake valve timing system 3 controls the opening and closing timing of the intake valves, while the electrically variable exhaust valve timing system 5 controls the opening and closing timing of the exhaust valves.

[0058] Preferably, when the engine 4 is cold-started, the opening and closing timing of the intake valve and the exhaust valve can be adjusted through the coordinated action of the electric variable intake valve timing system 3 and the electric variable exhaust valve timing system 5, so that the intake valve and the exhaust valve are overlapped, the airflow management is optimized, and it is ensured that the heated exhaust gas can be quickly blown to the catalyst material layer of the electric heating catalyst 6, thereby shortening the heating time of the catalyst.

[0059] In one embodiment, the exhaust treatment system also includes a post-processing module 7 and a muffler 12, wherein the post-processing module 7 and the muffler 12 are both arranged in the exhaust pipe 8 and are arranged in sequence according to the exhaust direction, and the post-processing module 7 is installed after the electric heating catalyst 6, aiming to further purify the exhaust gas treated by the electric heating catalyst 6 to ensure compliance with emission standards, and the muffler 12 is installed after the post-processing module 7 to reduce the noise of the exhaust system and improve the quietness of the vehicle. Preferably, the post-processing module 7 and the muffler 12 can be fixed in the exhaust pipe 8 by flanges, bolts or welding, which does not constitute a limitation of the present invention.

[0060] Through this setting, the exhaust treatment system can effectively optimize exhaust treatment and noise control, further improving the vehicle's environmental performance and driving comfort.

[0061] In one embodiment, the post-treatment module 7 includes one or more other types of catalysts, such as a three-way catalyst, a selective catalytic reduction (SCR) catalyst, a urea injection device, and / or a particulate filter (DPF). Preferably, after the exhaust gas is initially treated by the catalyst material layer in the electrically heated catalyst 6, pollutants such as nitrogen oxides (NOx), hydrocarbons (HC), and carbon monoxide (CO) in the exhaust gas are initially removed. A particulate filter can be further selected to effectively remove solid particulate matter (PM) in the exhaust gas to meet more stringent emission standards. Alternatively, a three-way catalyst can be selected to further process and purify the exhaust gas to further remove harmful substances such as nitrogen oxides, hydrocarbons, and carbon monoxide. This is merely an example, and the specific selection can be based on actual needs and does not constitute a limitation of the present invention.

[0062] It is understandable that through this two-stage purification method, the exhaust treatment system can provide a more efficient purification effect, significantly reduce the emission of harmful pollutants in the exhaust gas, further improve the environmental performance of the vehicle, and help protect the ambient air quality.

[0063] In one embodiment, the exhaust treatment system further includes an exhaust bypass line 9 and an electronic valve 10. The exhaust bypass line 9 is connected to the exhaust line 8, and the inlet of the exhaust bypass line 9 is located between the after-treatment module 7 and the muffler 12. The electronic valve 10 is disposed within the exhaust bypass line 9. Preferably, the electronic valve 10 can be fixed to the exhaust bypass line 9 by a flange, bolts, or welding, and is used to control the exhaust flow rate, allowing some exhaust to bypass the muffler 12 and be discharged directly through the exhaust bypass line 9, thereby effectively reducing exhaust back pressure and increasing the pressure difference between the intake and exhaust, further improving the scavenging effect of the engine 4. This is merely an example and does not constitute a limitation.

[0064] It can be understood that since the exhaust resistance of the muffler 12 is relatively large, by setting up an exhaust bypass pipe 9 and setting up an electronic valve 10 in the exhaust bypass pipe 9, it is possible to reduce the exhaust back pressure while ensuring emission control, so that the engine 4 can run more smoothly, improve the performance of the engine 4, and also help to reduce the burden on the exhaust treatment system, improve the responsiveness of the engine 4, and at the same time ensure that the vehicle optimizes power output while meeting emission standards and can reduce energy consumption.

[0065] In one embodiment, the electronic valve 10 includes a butterfly valve or a lift valve, and the specific valve can be selected according to actual needs and is not limited here.

[0066] In one embodiment, the electronic supercharger 2 includes an electric motor and a compressor, wherein the electric motor is connected to the compressor. Preferably, the electric motor can be connected to the compressor via a rigid coupling to ensure that the impeller of the compressor can rotate stably and at high speed, so that air can be smoothly sucked in and compressed.

[0067] It can be understood that connecting the electric motor and the compressor through a rigid coupling can reduce losses and fluctuations in the power transmission process, ensure that the electronic supercharger 2 maintains an efficient and stable working state during operation, and continuously and stably provides boosted intake air to the engine 4, effectively improving the reliability and boosting effect of the exhaust treatment system, especially under high load and dynamic conditions, and can maintain the stability of the boosting performance.

[0068] In one embodiment, the intake pipe 1, the exhaust pipe 8 and the exhaust bypass pipe 9 can all be set as long tubular structures or other shapes. Specifically, the shape and length of these pipes can be adjusted according to the overall design, spatial layout and performance requirements of the vehicle to achieve optimal fluid channels and exhaust paths, which does not constitute a limitation of the present invention.

[0069] It can be understood that the materials of the intake pipe 1, the exhaust pipe 8 and the exhaust bypass pipe 9 can be corrosion-resistant and high-temperature materials, such as stainless steel, high-temperature resistant alloys and coating materials, so as to ensure that during long-term use, they can effectively resist the erosion of corrosive components in the exhaust gas and high-temperature gases, thereby ensuring the reliable operation and durability of the exhaust treatment system and the entire vehicle.

[0070] In one embodiment, the control module 11 includes a first communication port, a second communication port, a third communication port, a fourth communication port, and a fifth communication port. Specifically, the first communication port is connected to the electronic supercharger 2 for controlling the electronic supercharger 2 to adjust the intake pressure; the second communication port is connected to the electrically heated catalyst 6 for adjusting the heating power of the electrically heated catalyst 6 to quickly increase the operating temperature of the catalyst; the third communication port is connected to the electrically variable intake valve timing system 3 and the electrically variable exhaust valve timing system 5, respectively, for controlling the opening sequence of the intake and exhaust valves to form a preset valve overlap angle; the fourth communication port is connected to the after-treatment module 7 for controlling the operating state of the after-treatment module 7; and the fifth communication port is connected to the electronic valve 10 for controlling the electronic valve 10 to adjust the flow rate of the exhaust bypass line 9.

[0071] It can be seen from this embodiment that, through the coordination of these communication ports, the control module 11 can achieve precise control of various components of the exhaust treatment system, ensuring efficient operation of the exhaust treatment system under different working conditions.

[0072] It should be understood that the control module 11 in the present invention may also be connected to the above modules in a wireless manner, which does not constitute a limitation of the present invention.

[0073] In summary, in one solution provided by an embodiment of the present invention, an electronic supercharger 2 is provided in the intake pipe 1, an electrically heated catalyst 6, a post-treatment module 7 and a muffler 12 are provided in the exhaust pipe 8, an electronic valve 10 is provided in the exhaust bypass pipe 9, and the electronic variable valve timing system and the control module 11 are combined for coordinated control. The control module 11 can control the electrically variable valve timing system by detecting the crankshaft phase of the engine 4 when it is stopped, adjust the opening timing of the intake valve and the exhaust valve, form a preset valve overlap angle, and enable the exhaust gas to quickly and effectively enter the exhaust pipe 8 and the electrically heated catalyst 6 under the action of the electronic supercharger 2. In turn, the electrically heated catalyst 6 can quickly increase the temperature of the internal catalyst, shorten the lag time of exhaust purification, improve the catalyst working efficiency during the cold start phase of the engine 4, effectively reduce the harmful gas emissions during the cold start phase of the engine 4, and improve the noise, vibration and harshness (NVH) performance. And under the action of the electronic valve 10, a large amount of exhaust gas is discharged through the exhaust bypass pipe 9 instead of the muffler 12, the exhaust back pressure is reduced, the intake and exhaust pressure difference is increased, the purging effect is enhanced, the fuel consumption is effectively reduced, and the emission control effect and fuel economy are comprehensively improved.

[0074] B. Exhaust treatment method

[0075] As described in Part A above, an embodiment of the present application provides an exhaust gas treatment system. Based on the exhaust gas treatment system, a corresponding exhaust gas treatment method is provided, which is described in detail below.

[0076] In one embodiment, if Figure 2 As shown, an exhaust gas treatment method is provided, comprising the following steps:

[0077] S10: Detecting the crankshaft phase of the engine in a stopped state.

[0078] It can be understood that the crankshaft phase refers to the specific position and corresponding angle information of the engine crankshaft during its rotation process, reflecting the stroke state of the piston in the cylinder.

[0079] As an example, after the vehicle is started, the crankshaft phase of the engine 4 in the stopped state can be detected by a sensor. For example, a high-precision Hall effect sensor is used to accurately capture the rotation angle of the crankshaft, thereby determining the crankshaft phase in the engine stopped state.

[0080] S20. Control the electrically variable valve timing system according to the crankshaft phase to adjust the opening timings of the intake valve and the exhaust valve to form a preset valve overlap angle, so as to increase the exhaust flow rate to the electrically heated catalyst by utilizing the valve overlap angle under the action of the electronic supercharger, so that the catalyst inside the electrically heated catalyst reaches the operating temperature.

[0081] As an example, after obtaining the crankshaft phase of engine 4, the current operating condition of engine 4 can be inferred based on the close correlation between the crankshaft phase and the operating condition of engine 4. Subsequently, control module 11 sends a control instruction to the electrically variable valve timing system based on the obtained crankshaft phase. Upon receiving the instruction, the electrically variable valve timing system adjusts the opening timing of the intake and exhaust valves to achieve a preset valve overlap angle. Furthermore, under the action of electronic supercharger 2, the valve overlap angle is used to increase the exhaust flow rate to electrically heated catalyst 6, allowing the catalyst inside electrically heated catalyst 6 to quickly reach operating temperature.

[0082] This embodiment demonstrates that adjusting the valve overlap angle effectively optimizes exhaust flow characteristics. This adjustment ensures that exhaust gas quickly and efficiently enters the electrically heated catalyst 6 for subsequent processing, thereby reducing harmful emissions. Furthermore, this adjustment improves the efficiency of residual gas discharge within the cylinders of engine 4 and the efficiency of fresh air intake, thereby enhancing the combustion performance of engine 4.

[0083] It should be understood that by detecting the crankshaft phase when the engine 4 is stopped and then adjusting the valve overlap angle according to the crankshaft phase, compared with traditional general intake or exhaust optimization methods, it is more targeted and dynamically adaptable, so that the fuel and air are mixed more fully and the combustion is more efficient, which not only improves power output but also effectively reduces pollutant emissions.

[0084] For example, assuming that the control module 11 detects that the crankshaft phase is 20°, based on this crankshaft phase, the control module 11 sends an adjustment instruction to the electric variable valve timing system. For example, the instruction is to open the intake valve when the crankshaft phase reaches 25°, and the exhaust valve is delayed to close when the crankshaft phase reaches 30°, thereby forming a valve overlap angle of 5°.

[0085] It should be understood that the valve overlap angle can be dynamically adjusted according to environmental conditions and the performance requirements of the engine 4. For example, during low-temperature starting, a larger valve overlap angle can be set to improve the gas flow performance of the combustion chamber of the engine 4 and accelerate the increase in exhaust temperature, thereby effectively reducing the emission of pollutants during the cold start process. This does not constitute a limitation of the present invention.

[0086] In one embodiment, after step S20, that is, after controlling the electric variable valve timing system according to the crankshaft phase to adjust the opening timing of the intake valve and the exhaust valve, the following steps are included:

[0087] S30, obtaining ambient temperature, exhaust back pressure, and exhaust temperature;

[0088] S40, dynamically adjusting the opening of the electronic valve according to the ambient temperature, the valve overlap angle, and the exhaust back pressure, so as to maintain the exhaust back pressure within a target range;

[0089] S50, dynamically adjusting the power of the electrically heated catalyst according to the ambient temperature, the valve overlap angle, the exhaust back pressure, and the exhaust temperature;

[0090] S70: Dynamically adjust the valve overlap angle and / or the power of the electronic supercharger according to the ambient temperature.

[0091] In this embodiment, the ambient temperature refers to the temperature of the atmosphere surrounding the vehicle, which can be collected by an external temperature sensor on the vehicle;

[0092] Exhaust back pressure refers to the reverse pressure generated by the resistance encountered by exhaust gas during the discharge process, which can be collected by a preset pressure sensor, wherein the pressure sensor can be set before the muffler 12 or at other locations;

[0093] The exhaust temperature refers to the temperature when it is discharged from the exhaust port of the exhaust pipe 8 or the exhaust bypass pipe 9, which can be collected by a preset temperature sensor, wherein the temperature sensor can be set at the exhaust port of the exhaust pipe 8 or the exhaust bypass pipe 9, which does not constitute a limitation here.

[0094] As an example, after acquiring the data in step S10, the control module 11 dynamically calculates the current ambient temperature, valve overlap, and exhaust back pressure using a preset algorithm, and then adjusts the opening of the electronic valve 10 in real time to maintain the exhaust back pressure within a target range, for example, between 0.8 bar and 1.2 bar. This optimizes exhaust flow characteristics and prevents excessively high or low exhaust back pressure from adversely affecting engine 4 performance and the operating efficiency of the electrically heated catalyst 6. For example, when the exhaust back pressure exceeds 1.2 bar, the control module 11 controls the opening angle of the electronic valve 10 to increase, thereby increasing the exhaust bypass volume and reducing the back pressure.

[0095] Furthermore, the power of the electrically heated catalyst 6 is dynamically adjusted based on the ambient temperature, valve overlap, exhaust back pressure, and exhaust temperature. For example, when the ambient temperature is low (e.g., below 0°C) and the exhaust temperature is insufficient to meet the catalyst's operating temperature, the control module 11 will increase the power of the electrically heated catalyst 6, for example, from 500W to 1000W, to quickly raise the temperature to the catalyst's light-off temperature (e.g., 250°C), thereby ensuring the exhaust treatment system's emissions performance under cold-start conditions. If the ambient temperature is high or the exhaust temperature has reached the catalyst's operating temperature range, the power of the electrically heated catalyst 6 can be reduced to save energy.

[0096] Furthermore, the valve overlap angle and / or the power of the electronic supercharger 2 can be dynamically adjusted based on the ambient temperature. For example, when the ambient temperature is low, the valve overlap angle and / or the power of the electronic supercharger 2 can be increased to increase the exhaust flow rate, thereby improving the efficiency of the exhaust gas heated by the electric heating element to quickly purge the catalyst material layer, so that the catalyst can reach the operating temperature more quickly. Conversely, when the ambient temperature is high, for example, exceeding 30°C, the control module 11 can reduce the valve overlap angle to prevent excessive exhaust gas backflow from negatively affecting the performance of the engine 4. At the same time, the power of the electronic supercharger 2 can be reduced to save energy.

[0097] This embodiment realizes dynamic optimization control of the opening of the electronic valve 10, the power of the electrically heated catalyst 6, the valve overlap angle, and the power of the electronic supercharger 2 by combining real-time operating parameters such as ambient temperature, exhaust back pressure, valve overlap angle, and exhaust temperature. This not only improves the efficiency of the exhaust treatment system and reduces harmful emissions, but also strikes a balance between energy consumption and emission performance, which is a significant improvement.

[0098] For example, assuming the vehicle is started in an environment with a temperature of 20°C, the control module 11 first detects that the ambient temperature is low, while the exhaust temperature is only 100°C and the back pressure is 1.3 bar. At this point, the control module 11, based on a preset algorithm, first adjusts the valve overlap angle to 20° to enhance exhaust efficiency and appropriately opens the electronic valve 10 to reduce the exhaust back pressure to the target range of 1.0 bar. Subsequently, the power of the electrically heated catalyst 6 can be increased from the default 600W to 1200W, allowing it to quickly heat up to 300°C, thereby ensuring that the catalyst can reach operating temperature as quickly as possible. Simultaneously, the power of the electronic supercharger 2 is increased from 60% to 80% of the rated power, increasing the intake pressure to improve purge efficiency and further facilitating the catalyst to reach operating temperature as quickly as possible. Through the above dynamic adjustments, the vehicle meets power requirements and reduces harmful emissions during a cold start. It should be understood that the above is merely an example and does not constitute a limitation.

[0099] In one embodiment, step S70, i.e., dynamically adjusting the valve overlap angle and / or the power of the electronic supercharger 2 according to the ambient temperature, includes the following steps:

[0100] S71. When the ambient temperature is within a first preset temperature range, adjusting the valve overlap angle according to a first preset overlap angle adjustment value, and / or adjusting the power of the electronic supercharger according to a first preset power adjustment value;

[0101] S72: When the ambient temperature is within a second preset temperature range, adjusting the valve overlap angle according to a second preset overlap angle adjustment value, and / or adjusting the power of the electronic supercharger according to a second preset power adjustment value;

[0102] S73: When the ambient temperature is within a third preset temperature range, adjust the valve overlap angle according to a third preset overlap angle adjustment value, and / or adjust the power of the electronic supercharger according to a third preset power adjustment value.

[0103] As an example, when it is detected that the ambient temperature is in a first preset temperature range (for example, below 0°C), the control module 11 will adjust the valve overlap angle according to the first preset overlap angle adjustment value, for example, increase the valve overlap angle according to the 10° overlap angle adjustment value to maintain the valve overlap angle within the first target valve overlap angle range (for example, 15°C to 25°C); at the same time, the control module 11 increases the power of the electronic supercharger 2 according to the first preset power adjustment value, increases the intake volume to compensate for the decrease in intake efficiency due to the increase in the valve overlap angle, and ensures that the output power of the engine 4 meets the demand.

[0104] When the ambient temperature is within a second preset temperature range (e.g., 0°C to 23°C), the control module 11 adjusts the valve overlap angle according to a second preset overlap angle adjustment value. For example, the valve overlap angle is increased by a 5° overlap angle adjustment value to maintain the valve overlap angle within a second target valve overlap angle range (e.g., 5°C to 10°C). At the same time, the power of the electronic supercharger 2 is appropriately adjusted according to a second preset power adjustment value to maintain the fuel economy and smooth operation of the engine 4.

[0105] When the ambient temperature is within a third preset temperature range (e.g., above 23°C), the control module 11 adjusts the valve overlap angle according to the third preset overlap angle adjustment value, reducing the valve overlap angle by 5°C to maintain the valve overlap angle within a third target valve overlap angle range (e.g., 5°C to 10°C), thereby reducing the amount of residual exhaust gas in the cylinders of the engine 4 and preventing excessive combustion temperature from causing a heat load on the engine 4. At the same time, the power of the electronic supercharger 2 is adjusted according to the third preset power adjustment value to reduce power consumption and optimize the economic efficiency of the engine 4.

[0106] Through this temperature range-based dynamic adjustment strategy, the control module 11 achieves coordinated optimization of the valve overlap angle and the power of the electronic supercharger 2, so that the engine 4 can maintain optimal emission treatment effects and operating performance under different temperature environments. The above is only one adjustment scheme and does not constitute a limitation of the present invention.

[0107] In summary, the following is a complete example based on steps S10-S70:

[0108] The control module 11 first detects the crankshaft phase of the engine 4 when it is stopped. Based on this phase, it controls the electrically variable valve timing system, adjusting the opening sequence of the intake and exhaust valves to achieve a preset valve overlap angle and optimize exhaust airflow. Subsequently, based on changes in ambient temperature, the control module 11 adjusts the valve overlap angle and controls the power of the electronic supercharger 2. Simultaneously, the control module 11 monitors exhaust back pressure and exhaust temperature in real time. By adjusting the opening of the electronic valve 10 and the power of the electrically heated catalyst 6, the control module 11 coordinates the operating states of the electrically variable valve timing system, the electronic supercharger 2, the electrically heated catalyst 6, the aftertreatment module 7, and the electronic valve 10 to optimize exhaust treatment and ensure efficient operation of the exhaust treatment system under various operating conditions. In particular, during cold starts, the control module 11 can rapidly increase exhaust temperature and optimize the operation of the catalyst.

[0109] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0110] C. Controller

[0111] In one embodiment, a controller is provided. The controller may be a server, and its internal structure diagram may be as follows: Figure 3 As shown. The controller includes a processor, a memory, and a network interface connected via a system bus. The processor of the controller is used to provide computing and control capabilities. The memory of the controller includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The network interface of the controller is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, an exhaust treatment method is implemented.

[0112] In one embodiment, a controller is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the following steps are implemented:

[0113] Detect the crankshaft phase when the engine is stopped;

[0114] According to the crankshaft phase, the electric variable valve timing system is controlled to adjust the opening timing of the intake valve and the exhaust valve to form a preset valve overlap angle. Under the action of the electronic supercharger, the valve overlap angle is utilized to increase the exhaust flow rate flowing to the electrically heated catalyst, so that the catalyst inside the electrically heated catalyst reaches the operating temperature.

[0115] D. Computer readable storage medium

[0116] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0117] Detect the crankshaft phase when the engine is stopped;

[0118] According to the crankshaft phase, the electric variable valve timing system is controlled to adjust the opening timing of the intake valve and the exhaust valve to form a preset valve overlap angle. Under the action of the electronic supercharger, the valve overlap angle is utilized to increase the exhaust flow rate flowing to the electrically heated catalyst, so that the catalyst inside the electrically heated catalyst reaches the operating temperature.

[0119] It should be noted that for more functions or steps implemented by the controller in the aforementioned part C and the computer storage medium in the aforementioned part D, as well as the technical effects brought about, please refer to the description of the aforementioned method embodiment. In order to avoid repetition, they will not be repeated here.

[0120] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0121] Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0122] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. An exhaust gas treatment system, characterized in that: The exhaust gas treatment system comprises: An intake pipe, used to connect to the intake valve of the engine; an exhaust pipe, used to be connected to an exhaust valve of the engine; an electronic supercharger, disposed in the intake pipe; an electrically heated catalyst, disposed in the exhaust pipe; an electrically variable valve timing system, for being provided in the valve train of the engine; A control module is connected to the electronic supercharger, the electrically heated catalyst, and the electrically variable valve timing system, and is used to: detecting a crankshaft phase of the engine in a stopped state; According to the crankshaft phase, the electric variable valve timing system is controlled to adjust the opening timing of the intake valve and the exhaust valve to form a preset valve overlap angle. Under the action of the electronic supercharger, the valve overlap angle is utilized to increase the exhaust flow rate flowing to the electrically heated catalyst, so that the catalyst inside the electrically heated catalyst reaches the operating temperature.

2. The exhaust gas treatment system according to claim 1, wherein: The electric variable valve timing system includes an electric variable intake valve timing system and an electric variable exhaust valve timing system; The electrically variable intake valve timing system and the electrically variable exhaust valve timing system are both provided in the valve mechanism.

3. The exhaust gas treatment system according to claim 2, wherein: The exhaust gas treatment system further comprises: a post-processing module, disposed in the exhaust pipe, for further purifying the exhaust gas after being treated by the electrically heated catalyst; a muffler, disposed in the exhaust pipe; Wherein, the electrically heated catalyst, the post-processing module and the muffler are arranged in sequence along the exhaust direction.

4. The exhaust gas treatment system according to claim 3, wherein: The exhaust gas treatment system further comprises: an exhaust bypass line connected to the exhaust line, with an inlet of the exhaust bypass line being arranged between the post-processing module and the muffler; The electronic valve is arranged in the exhaust bypass pipeline.

5. An exhaust gas treatment method, characterized in that: Applied to the exhaust gas treatment system of claim 4, the method comprises: Detect the crankshaft phase when the engine is stopped; According to the crankshaft phase, the electric variable valve timing system is controlled to adjust the opening timing of the intake valve and the exhaust valve to form a preset valve overlap angle. Under the action of the electronic supercharger, the valve overlap angle is utilized to increase the exhaust flow rate flowing to the electrically heated catalyst, so that the catalyst inside the electrically heated catalyst reaches the operating temperature.

6. The exhaust gas treatment method according to claim 5, wherein: After controlling the electric variable valve timing system according to the crankshaft phase to adjust the opening timing of the intake valve and the exhaust valve, the method includes: Get ambient temperature, exhaust back pressure and exhaust temperature; dynamically adjusting the opening of the electronic valve according to the ambient temperature, the valve overlap angle, and the exhaust back pressure so as to maintain the exhaust back pressure within a target range; dynamically adjusting the power of the electrically heated catalyst according to the ambient temperature, the valve overlap angle, the exhaust back pressure, and the exhaust temperature; The valve overlap angle and / or the power of the electronic supercharger are dynamically adjusted according to the ambient temperature.

7. The exhaust gas treatment method according to claim 6, wherein: The dynamically adjusting the valve overlap angle and / or the power of the electronic supercharger according to the ambient temperature includes: When the ambient temperature is within a first preset temperature range, adjusting the valve overlap angle according to a first preset overlap angle adjustment value, and / or adjusting the power of the electronic supercharger according to a first preset power adjustment value; When the ambient temperature is within a second preset temperature range, adjusting the valve overlap angle according to a second preset overlap angle adjustment value, and / or adjusting the power of the electronic supercharger according to a second preset power adjustment value; When the ambient temperature is within a third preset temperature range, the valve overlap angle is adjusted according to a third preset overlap angle adjustment value, and / or the power of the electronic supercharger is adjusted according to a third preset power adjustment value.

8. A controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the exhaust gas treatment method according to any one of claims 5 to 7 is implemented.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the exhaust gas treatment method according to any one of claims 5 to 7 is implemented.

10. A vehicle, characterized in that: The vehicle comprises the exhaust gas treatment system according to any one of claims 1 to 4 , or the vehicle comprises the controller according to claim 8 .

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