Control method of engine air inlet system, engine air inlet system and vehicle

Abstract

The invention provides a control method of an engine air inlet system, the engine air inlet system and a vehicle, and relates to the technical field of vehicles. According to the operation environment information, the on-off state of a first air inlet pipeline connected with an air inlet of the air filter is controlled, and the on-off state of a second air inlet pipeline connected with the air inlet of the air filter is controlled; wherein the air filter is used for filtering air guided in by the first air inlet pipeline and / or the second air inlet pipeline and transmitting the filtered air to the engine; an air inlet of the first air inlet pipeline is formed in a first space in the vehicle body, and an air inlet of the second air inlet pipeline is located on the outer side of a cabin of the engine. The proper air inlet pipe is intelligently selected for air inlet according to the operation environment, and efficient operation of the engine in various environments is achieved.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and more particularly, to a control method for an engine intake system, an engine intake system, and a vehicle in the field of vehicles. Background Art

[0002] With economic development and the continuous improvement of people's living standards, cars have become commonplace in thousands of households. In the automotive industry, increasingly stringent environmental regulations and increasing consumer demands for fuel economy have led to a common problem with existing engine intake systems: the inability of intake designs to adapt to changing operating environments. This can lead to reduced or even damage to air filters and engines in harsh environments, reduced intake efficiency, and increased fuel consumption. Therefore, ensuring that engine intake systems can adapt to these changing operating environments and avoid these issues has become a critical issue for automakers. Summary of the Invention

[0003] In view of the above problems, the present disclosure provides a control method for an engine intake system, an engine intake system, and a vehicle that overcome or at least partially solve the above problems. The technical solutions are as follows:

[0004] In a first aspect, the present disclosure provides a method for controlling an engine intake system, the method comprising:

[0005] Obtain vehicle operating environment information;

[0006] Controlling the on-off state of a first air intake line connected to the air intake port of the air filter and controlling the on-off state of a second air intake line connected to the air intake port of the air filter according to the operating environment information;

[0007] In which, the air filter is used to filter the air introduced into the first air intake pipe and / or the second air intake pipe, and transmit the filtered air to the engine; the air inlet of the first air intake pipe is arranged in the first space in the vehicle body, and the air inlet of the second air intake pipe is located outside the engine compartment.

[0008] Optionally, the operating environment information includes at least one of ambient temperature, rainfall, air quality index, vehicle wading depth, and vehicle speed; and controlling the on-off state of a first air intake line connected to an air inlet of an air filter and controlling the on-off state of a second air intake line connected to an air inlet of an air filter according to the operating environment information includes:

[0009] According to the operating environment information, controlling one of a first air intake line connected to the air inlet of the air filter and a second air intake line connected to the air inlet of the air filter to be turned on and the other to be turned off;

[0010] Alternatively, according to the operating environment information, the first air intake line connected to the air intake port of the air filter and the second air intake line connected to the air intake port of the air filter are controlled to be connected.

[0011] Optionally, controlling one of a first air intake line connected to the air inlet of the air filter and a second air intake line connected to the air inlet of the air filter to be connected and the other to be closed according to the operating environment information includes:

[0012] Determining whether the ambient temperature is less than a first preset temperature, whether the rainfall is greater than a first preset rainfall, whether the air quality index is greater than a first preset value, whether the vehicle wading depth is greater than a first preset wading depth, and whether the vehicle speed is greater than a first preset speed;

[0013] If at least one condition is met, the first air intake line connected to the air inlet of the air filter is controlled to be open, and the second air intake line connected to the air inlet of the air filter is controlled to be closed;

[0014] Otherwise, the first air intake line connected to the air intake port of the air filter is controlled to be closed, and the second air intake line connected to the air intake port of the air filter is controlled to be connected.

[0015] Optionally, after controlling the first air intake line connected to the air inlet of the air filter to be closed and controlling the second air intake line connected to the air inlet of the air filter to be opened, the method further includes:

[0016] In response to the engine power being greater than a preset power, a first intake line connected to an intake port of an air filter is controlled to be open.

[0017] Optionally, the control method further includes: controlling the on / off state of a first transmission pipeline and a second transmission pipeline between the supercharger and the engine throttle according to the operating environment information, wherein the first transmission pipeline includes an intercooler.

[0018] Optionally, the operating environment includes an ambient temperature; and controlling the on / off state of a first transmission pipeline and a second transmission pipeline between the supercharger and the engine throttle according to the operating environment information includes:

[0019] At least one of a first transmission line and a second transmission line between the supercharger and the engine throttle is controlled to be conductive according to the operating environment information.

[0020] Optionally, controlling at least one of a first transmission line and a second transmission line between the supercharger and the engine throttle to be connected according to the operating environment information includes:

[0021] determining whether the ambient temperature is less than a second preset temperature;

[0022] When the ambient temperature is lower than a second preset temperature, the first transmission line between the supercharger and the engine throttle is controlled to be closed, and the second transmission line is controlled to be opened;

[0023] When the ambient temperature is greater than or equal to the second preset temperature, determining whether the ambient temperature is less than a third preset temperature, wherein the third preset temperature is higher than the second preset temperature;

[0024] When the ambient temperature is lower than a third preset temperature, the first transmission line and the second transmission line between the supercharger and the engine throttle are controlled to be connected;

[0025] When the ambient temperature is greater than or equal to a third preset temperature, the first transmission pipeline between the supercharger and the engine throttle is controlled to be connected, and the second transmission pipeline is controlled to be closed.

[0026] In a second aspect, based on the same inventive concept, the present disclosure further provides an engine intake system, comprising:

[0027] an air filter, which delivers filtered air to the engine;

[0028] a first air intake line connected to an air inlet of the air filter; the air inlet of the first air intake line being located in a first space within the vehicle body;

[0029] a second air intake line connected to an air inlet of the air filter; the air inlet of the second air intake line being located outside the engine compartment;

[0030] The controller is configured to control the on / off status of the first air intake line and the second air intake line.

[0031] Optionally, the engine intake system also includes a switching valve, which is electrically connected to the controller; the controller is used to control the conduction state of the switching valve; the switching valve is located between the first intake line and the intake pipe of the air filter, and between the second intake line and the intake pipe of the air filter.

[0032] Optionally, the engine air intake system further includes a supercharger, a first transmission line and a second transmission line, wherein the first transmission line and the second transmission line are connected in parallel between the supercharger and the engine throttle, and the supercharger is used to receive air filtered by an air filter and compress the air before transmitting it to the engine through the first transmission line and / or the second transmission line; wherein the first transmission line includes an intercooler.

[0033] In a third aspect, based on the same inventive concept, the present disclosure also provides a vehicle, comprising the engine intake system provided in the aforementioned second aspect.

[0034] The technical solution provided by the embodiments of the present disclosure has the following advantages over the prior art:

[0035] In the control method of the engine air intake system, the engine air intake system, and the vehicle provided by the embodiments of the present disclosure, the on-off state of the first air intake line and the second air intake line connected to the air intake port of the air filter can be controlled according to the operating environment information of the vehicle. For example, in a harsh environment such as heavy rain or a sandstorm, if only the second air intake line is provided, when the second air intake line is turned on, since the air intake port of the second air intake line is located outside the engine cabin and is directly exposed to the external environment, impurities such as rainwater and sand will directly enter the second air intake line and the air filter through the exposed air intake port, resulting in a shortened life of the air filter, a decrease in filtering capacity, a significant increase in air intake resistance, a decrease in air intake efficiency, and an increase in fuel consumption; it will also cause an increase in impurities entering the engine, which may cause engine wear and shorten its life. In addition, if rainwater enters the engine through the second air intake pipe and the air filter, it may also cause the engine to stall or the bearing to crack, damaging the engine. Therefore, the disclosed embodiment introduces two intake lines. In harsh environments such as heavy rain or sandstorms, only the first intake line can be opened, while the second intake line can be closed. Because the air inlet of the first intake line is relatively closed and not directly exposed to the external environment, it can effectively prevent impurities such as rainwater and sand from entering the first intake line. This significantly reduces the impact of impurities on the air filter and engine, preventing problems such as reduced air filter life and engine life or damage caused by impurities. Furthermore, when air is drawn through the first intake line in harsh environments, air filter clogging due to impurities or water is prevented. Therefore, even in harsh environments, the first intake line can maintain a relatively stable intake resistance, ensuring that the engine can inhale sufficient, relatively clean air for combustion. This avoids the problem of a sharp drop in intake efficiency and deterioration in fuel efficiency (increased fuel consumption) caused by severe air filter clogging. This improves intake efficiency and reduces fuel consumption in harsh environments, while simultaneously protecting the engine's intake system and improving fuel economy.

[0036] When the operating environment is favorable and road conditions are good, the second air intake line can be opened and the first air intake line closed. Since the second air intake line's air inlet is located outside the engine compartment, it can receive relatively low-temperature, low-density, and high-flow air from the outside during driving. This low-temperature, high-density, high-flow air helps improve engine combustion efficiency, thereby increasing power output and improving fuel economy. Furthermore, if the second air intake line is located farther from the cab, such as in front of the engine compartment, it can also help reduce the impact of intake noise on the user.

[0037] Therefore, the control method for the engine intake system provided in the disclosed embodiments can intelligently utilize intake air from different locations based on the vehicle's actual operating environment, providing higher-quality intake air to the engine under different operating conditions. This effectively improves the engine's intake efficiency under various operating conditions, reduces fuel consumption, increases energy utilization, effectively reduces exhaust emissions, enhances the user experience, and improves the vehicle's market competitiveness. This method demonstrates significant technical benefits in terms of improved performance, fuel economy, component life, and adaptability to harsh environments, thereby overcoming the shortcomings of traditional single-intake systems, which struggle to address diverse operating conditions.

[0038] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0040] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0041] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present disclosure. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0042] Figure 1 Shown is a flow chart of a control method for an engine intake system provided by an embodiment of the present disclosure;

[0043] Figure 2 Shown is a flow chart for controlling the working states of the first air intake line and the second air intake line;

[0044] Figure 3 Shown is a flow chart for controlling the working states of the first transmission pipeline and the second transmission pipeline;

[0045] Figure 4 Shown is a structural schematic diagram of an engine intake system provided by an embodiment of the present disclosure;

[0046] Figure 5 Shown is another structural schematic diagram of the engine intake system provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0047] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features therein can be combined with each other in the absence of conflict.

[0048] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0049] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0050] In the automotive industry, with increasingly stringent environmental regulations and rising consumer demands for fuel economy, improving engine intake efficiency, reducing fuel consumption, and reducing pollutant emissions have become critical issues for automakers. A common problem with existing engine intake systems is that the intake design cannot adapt to changing operating environments. This can lead to reduced or even damage to air filters and engines in harsh environments, reduced intake efficiency, and increased fuel consumption. Specifically, existing intake systems are insufficiently adaptable to environmental conditions. For example, in environments with high levels of impurities such as dust, water, and snow, intake air quality issues directly impact engine performance.

[0051] For example, on rainy days or in wading conditions, if the air intake of the engine intake system is arranged on the outside of the vehicle body, the large amount of water in the air can easily enter the engine, causing the engine to stall or the bearing to crack, thereby damaging the engine.

[0052] For another example, if there is too much dust or impurities in the environment (such as rural dirt roads or off-road environments), a large amount of dust and impurities will enter the air filter, resulting in a shortened air filter life and reduced filtering capacity, significantly increasing intake resistance, resulting in reduced intake efficiency and increased fuel consumption; it may also cause an increase in dust and impurities that eventually enter the engine, causing engine wear and shortening its life.

[0053] In view of the above problems, the present disclosure provides a control method for an engine intake system. Figure 1The figure shows a flow chart of a control method of an engine intake system provided by an embodiment of the present disclosure. Please refer to Figure 1 , the control method includes:

[0054] Step S1: Obtain vehicle operating environment information.

[0055] Among them, optionally, the vehicle's operating environment information refers to the sum of various external conditions and the vehicle's own status during driving, including at least ambient temperature, rainfall, air quality, vehicle wading depth, vehicle speed, etc. These factors will directly or indirectly affect the performance of the vehicle.

[0056] Step S2: Controlling the on-off state of the first air intake line connected to the air inlet of the air filter and the on-off state of the second air intake line connected to the air inlet of the air filter according to the operating environment information.

[0057] The air filter is used to filter air introduced into the first air intake line and / or the second air intake line and transmit the filtered air to the engine. The air inlet of the first air intake line is arranged in the first space within the vehicle body, and the air inlet of the second air intake line is located outside the engine compartment.

[0058] It should be noted that the first space in the vehicle body can be regarded as a relatively closed space set within the vehicle body shell. It is not directly exposed to the external environment of the vehicle and can at least block impurities directly splashed from the external environment. The first space in the vehicle body, for example, includes the inner side of the fender, wherein the fender is a body cover covering above the wheel, and the inner side of the fender refers to the internal space of the fender shell, which is a relatively closed space. For another example, the first space in the vehicle body can also be reflected as a space formed by a protective shell set inside the engine compartment. This space is relatively closed but not sealed, allowing air to enter, but can block impurities directly splashed from the external environment. The present disclosure does not limit the actual position of the air inlet of the first air intake duct.

[0059] The engine compartment refers to the area covered by the hood that houses the engine and its associated components. The exterior of the engine compartment refers to the area directly exposed to the vehicle's external environment, such as the exterior surface of the engine compartment, the front bumper, the sides of the vehicle, and the rear bumper.

[0060] The present disclosure introduces a first air intake line and a second air intake line into the engine air intake system. The air intake of the first air intake line is located in a first space in the vehicle body. The first space is relatively closed and can effectively prevent dust, rain, snow and other impurities in the external environment from directly entering the first air intake line, thereby protecting the air filter and the engine from pollution or reducing pollution, thereby avoiding or reducing damage to the air filter and the engine caused by impurities.

[0061] The air inlet of the second air intake duct is located outside the engine compartment. For example, when the engine compartment is a front-mounted structure (located in front of the cab), the air inlet of the second air intake duct can be set on the front side of the engine compartment. At this time, the air inlet of the second air intake duct can directly face the direction of the vehicle's movement, which is conducive to the introduction of air with lower external temperature and higher density, thereby helping to improve the engine's combustion efficiency and increase the engine's power output. When the engine compartment is a rear-mounted structure (located behind the cab), the air inlet of the second air intake duct can be set at the rear or side of the engine compartment, away from the position of the exhaust pipe. The air inlet of the second air intake duct can also be set at suitable positions such as on both sides of the rear bumper, so that the air flow of the vehicle body can be used for air intake. The present disclosure does not limit the actual position of the air inlet of the second air intake duct.

[0062] In the control method of the engine intake system disclosed in the embodiment of the present disclosure, the on-off state of the first intake duct and the second intake duct connected to the air inlet of the air filter can be controlled according to the operating environment information of the vehicle. For example, in a harsh environment such as heavy rain or sandstorm, if only the second intake duct is provided, when the second intake duct is connected, since the air inlet of the second intake duct is located outside the engine cabin and is directly exposed to the external environment, impurities such as rainwater and sand will directly enter the second intake duct and the air filter through the exposed air inlet, resulting in a shortened life of the air filter, a decrease in filtering capacity, a significant increase in intake resistance, a decrease in intake efficiency, and an increase in fuel consumption; it will also cause an increase in impurities entering the engine, which may cause engine wear and shorten its life. In addition, if rainwater enters the engine through the second intake duct and the air filter, it may also cause the engine to stall or the bearing to crack, damaging the engine. Therefore, in harsh environments such as heavy rain or sandstorms, only the first intake line can be opened while the second intake line is closed. Since the air inlet of the first intake line is relatively closed and not directly exposed to the external environment, it can largely prevent impurities such as rainwater, sand, and dust from entering the first intake line, effectively reducing the impact of impurities on the air filter and engine, avoiding problems such as impurities that can reduce air filter life and engine life or damage. Furthermore, when air is drawn through the first intake line in harsh environments, air filter clogging due to impurities or water is prevented. Therefore, even in harsh environments, the first intake line can maintain a relatively stable intake resistance, ensuring that the engine can inhale sufficient, relatively clean air for combustion, avoiding the sharp decline in intake efficiency and deterioration in fuel efficiency (increased fuel consumption) caused by severe air filter clogging. This improves intake efficiency and reduces fuel consumption in harsh environments, while simultaneously protecting the engine's intake system and improving fuel economy.

[0063] When the operating environment and road conditions are favorable, the second air intake line can be opened and the first air intake line closed. Since the second air intake is located outside the engine compartment, it can receive relatively low-temperature, low-density, and high-flow air from the outside during driving. This low-temperature, high-density, high-flow air helps improve engine combustion efficiency, thereby increasing engine power output and improving fuel economy. Furthermore, if the second air intake is located farther from the cab, such as in front of the engine compartment, it can help reduce the impact of intake noise on the user, thereby improving the user experience.

[0064] Therefore, the control method for the engine intake system provided in the disclosed embodiments can intelligently utilize intake air from different locations based on the vehicle's actual operating environment, providing higher-quality intake air to the engine under different operating conditions. This effectively improves the engine's intake efficiency under various operating conditions, reduces fuel consumption, increases energy utilization, effectively reduces exhaust emissions, enhances the user experience, and improves the vehicle's market competitiveness. This method demonstrates significant technical benefits in terms of improved performance, fuel economy, component life, and adaptability to harsh environments, thereby overcoming the shortcomings of traditional single-intake systems, which struggle to address diverse operating conditions.

[0065] In an optional embodiment of the present disclosure, the operating environment information includes at least one of ambient temperature, rainfall, air quality index, vehicle wading depth, and vehicle speed. In the aforementioned step S2, controlling the on / off state of the first intake pipe connected to the air inlet of the air filter and the on / off state of the second intake pipe connected to the air inlet of the air filter according to the operating environment information includes: controlling one of the first intake pipe connected to the air inlet of the air filter and the second intake pipe connected to the air inlet of the air filter to be on and the other to be off according to the operating environment information; or controlling both the first intake pipe connected to the air inlet of the air filter and the second intake pipe connected to the air inlet of the air filter to be on according to the operating environment information.

[0066] This embodiment relates to three intake modes for the engine intake system. The first intake mode controls the first intake line to be open and the second intake line to be closed based on operating environment information. The second intake mode controls the first intake line to be closed and the second intake line to be open based on operating environment information. The third intake mode controls both the first and second intake lines to be open based on operating environment information.

[0067] Ambient temperature, rainfall, air quality index, vehicle wading depth, and vehicle speed all potentially affect the air intake of the engine's intake system. When the first intake mode is selected based on the operating environment, such as heavy rainfall, a high air quality index, or the possibility of wading at high speed, the first intake line's corresponding air inlet is located in a relatively enclosed space, reducing the direct entry of impurities such as dust, water, and snow into the intake system. This significantly reduces the impact of impurities on the air filter and engine, preventing issues such as reduced air filter life and engine life or damage caused by impurities. Even in harsh environments, the first intake line maintains a relatively stable intake resistance, ensuring the engine can draw sufficient, relatively clean air for combustion, avoiding a sharp drop in intake efficiency and deterioration in fuel efficiency (increased fuel consumption) due to severe air filter blockage. Therefore, in harsh environments or road conditions, the first intake mode can be selected to improve engine intake air quality and efficiency, protecting the air filter and engine.

[0068] When the aforementioned second intake mode is selected according to the operating environment, the air intake corresponding to the second intake line can inhale a large amount of relatively low-temperature, high-density air to meet the engine's combustion requirements, help the engine enter the optimal working state faster, increase power output and improve fuel economy, and reduce emissions and wear during cold start.

[0069] When the third intake mode is selected based on operating conditions, both the first and second intake lines are open. This is particularly useful when a larger intake volume is required, ensuring a more adequate air supply to the engine. Furthermore, when both the first and second intake lines are used simultaneously, the air in the two lines can be turbulent or mixed in the air filter, positively impacting engine combustion efficiency.

[0070] Therefore, in this implementation, a more suitable intake mode among the above three intake modes is flexibly selected based on the vehicle's operating environment information, providing the vehicle with more flexible intake options, so that the engine's intake meets the needs of different operating environments, thereby helping to improve intake quality, enhance engine performance, improve fuel economy, and extend the life of the air filter and engine under different operating environments.

[0071] The specific implementation method of controlling the connection state between the first intake line and the second intake line will be described below.

[0072] In practical applications, a switching valve can be introduced into the engine intake system to control the conduction state of the first intake line and the second intake line. The switching valve can, for example, be connected between the first intake line and the air inlet of the air filter, and between the second intake line and the air inlet of the air filter.

[0073] In an optional embodiment of the present disclosure, the aforementioned switching valve includes a first three-way valve. Based on the operating environment information, controlling one of the first intake line connected to the air inlet of the air filter and the second intake line connected to the air inlet of the air filter to be connected and the other to be closed includes: based on the operating environment information, controlling the passage between the first input port and the output port of the first three-way valve to be connected and the passage between the second input port and the output port of the first three-way valve to be disconnected; or, based on the operating environment information, controlling the passage between the first input port and the output port of the first three-way valve to be disconnected and the passage between the second input port and the output port of the first three-way valve to be connected. The first input port of the first three-way valve is connected to the first intake line, the second input port of the first three-way valve is connected to the second intake line, and the output port of the first three-way valve is connected to the air inlet of the air filter.

[0074] In this embodiment, a first three-way valve is introduced between the first and second intake lines, and the air inlet of the air filter. The two input ports of the first three-way valve are connected to the first and second intake lines, respectively, and the output port of the first three-way valve is connected to the air inlet of the air filter. In practical applications, when it is necessary to connect the first intake line to the air filter and disconnect the second intake line from the air filter, the position of the valve core in the first three-way valve can be controlled to connect the first input port and the output port and disconnect the second input port and the output port. When it is necessary to connect the second intake line to the air filter and disconnect the first intake line from the air filter, the position of the valve core in the first three-way valve can be controlled to connect the second input port and the output port and disconnect the first input port and the output port.

[0075] Similarly, controlling the connection of a first intake line connected to the air inlet of the air filter and a second intake line connected to the air inlet of the air filter based on the operating environment information includes: controlling the connection of a passage between a first input port and an output port of a first three-way valve, and a passage between a second input port and an output port of the first three-way valve based on the operating environment information; wherein the first input port of the first three-way valve is connected to the first intake line, the second input port of the first three-way valve is connected to the second intake line, and the output port of the first three-way valve is connected to the intake pipe of the air filter. In other words, by controlling the position of the valve core in the first three-way valve, the passage between the first input port and the output port and the passage between the second input port and the output port can be simultaneously connected.

[0076] By introducing a first three-way valve in this embodiment, the first and second intake lines can be flexibly switched and combined, allowing precise selection of only one intake line to deliver air to the air filter while completely shutting off the other. Furthermore, through control, both the first and second intake lines can be simultaneously opened, allowing air from both lines to mix. Compared to installing independent on / off valves on each intake line, a single three-way valve in this embodiment enables switching and combined control of both intake lines, simplifying the structure and control logic of the entire intake system.

[0077] It should be noted that, in addition to being embodied as the first three-way valve mentioned in the above embodiment, the switching valve can also be embodied as other structures. For example, the switching valve may include a first switch valve and a second switch valve, the first switch valve being arranged between the first intake pipe and the air inlet of the air filter, and the second switch valve being arranged between the second intake pipe and the air inlet of the air filter. At this time, according to the operating environment information, one of the first intake pipe connected to the air inlet of the air filter and the second intake pipe connected to the air inlet of the air filter is controlled to be connected and the other is closed, including: controlling the first switch valve in the first intake pipe to open, controlling the second switch valve in the second intake pipe to close, so as to connect the first intake pipe and cut off the second intake pipe; or controlling the first switch valve in the first intake pipe to close, and controlling the second switch valve in the second intake pipe to open, so as to connect the second intake pipe and cut off the first intake pipe. Similarly, according to the operating environment information, the first intake pipe connected to the air inlet of the air filter and the second intake pipe connected to the air inlet of the air filter are controlled to be connected, including: controlling the first switch valve in the first intake pipe to open, and controlling the second switch valve in the second intake pipe to open, so as to simultaneously connect the first intake pipe and the second intake pipe.

[0078] Therefore, when the first switching valve and the second switching valve are introduced into the first intake line and the second intake line respectively, the first intake line and the second intake line can also be flexibly switched and used in combination, which is not limited in the present disclosure.

[0079] The following will further illustrate the flexible switching and combined use of the first intake line and the second intake line in combination with specific vehicle operating environment information.

[0080] Figure 2 The figure shows a flow chart for controlling the working status of the first and second air intake pipes. Figure 2 In an optional embodiment of the present disclosure, controlling one of a first intake line connected to an air inlet of an air filter and a second intake line connected to an air inlet of the air filter to be turned on and the other to be turned off based on the operating environment information includes:

[0081] Step S11: Determine whether the ambient temperature is less than a first preset temperature, whether the rainfall is greater than a first preset rainfall, whether the air quality index is greater than a first preset value, whether the vehicle's wading depth is greater than a first preset wading depth, and whether the vehicle's speed is greater than a first preset speed. Determine whether at least one of the conditions is met; if so, proceed to step S12; otherwise, proceed to step S13.

[0082] It should be noted that these operating environment information can be collected through sensors, for example, the ambient temperature signal can be obtained through the ambient temperature sensor, the rainfall signal can be obtained through the rain sensor, the air quality index can be obtained through the air quality sensor, the wading depth signal can be obtained through the wading depth sensor, the vehicle speed signal can be obtained through the wheel speed sensor, and so on.

[0083] Step S12: Control the first air intake line connected to the air inlet of the air filter to be turned on, and control the second air intake line connected to the air inlet of the air filter to be turned off.

[0084] Step S13: Control the first air intake line connected to the air inlet of the air filter to be closed, and control the second air intake line connected to the air inlet of the air filter to be connected.

[0085] During engine operation, the piston rings cannot achieve a complete seal, and a small amount of post-combustion gases (blow-by gases) leak into the crankcase. These gases contain water vapor, unburned hydrocarbons, and other substances. The crankcase ventilation system directs these harmful gases into the intake manifold for re-combustion, reducing emissions and maintaining crankcase pressure balance. In this embodiment, the first preset temperature corresponds to a relatively low temperature environment. For example, when the first preset temperature is 2°C or lower (e.g., 0°C or lower), the air entering the engine is relatively low in temperature. This relatively low-temperature air exchanges heat with the crankcase through components such as the cylinder walls and pistons, lowering the overall crankcase temperature. Water vapor in the crankcase is already at a critical freezing point due to the low ambient temperature. If the engine's intake air temperature is even lower, the water vapor in the crankcase is more likely to drop below freezing, causing condensation and ice. Ice can gradually clog the crankcase ventilation system, resulting in poor ventilation or even complete blockage. Abnormal crankcase pressure can affect normal engine operation, potentially leading to reduced power and increased fuel consumption.

[0086] Based on the above problems, in this embodiment, when it is determined that the ambient temperature is lower than the first preset temperature, the first intake pipe connected to the air inlet of the air filter is controlled to be connected. Since the air inlet of the first intake pipe is located in the first space in the vehicle body, the first space is relatively hidden and is less affected by the cold air than the air inlet of the second intake pipe arranged outside the engine compartment. That is to say, the air temperature at the air inlet of the first intake pipe is higher than the air temperature at the air inlet of the second intake pipe. At this time, the temperature of the air transmitted to the engine through the first intake pipe will also be higher than the temperature of the air entering the engine through the second intake pipe. Therefore, when the first intake pipe is used for intake when the ambient temperature is lower than the first preset temperature, the relatively high temperature air is conducive to avoiding the freezing of water vapor in the crankcase, thereby avoiding the problem of abnormal crankcase pressure caused by freezing, and further helping to avoid the problem of engine power reduction and increased fuel consumption due to abnormal crankcase pressure.

[0087] In addition to considering the impact of ambient temperature on the operation of the engine's intake system, rainfall also has an impact. If rainfall exceeds the first preset rainfall level, using the second intake line, the inlet of the second intake line is located outside the engine nacelle. This heavy rainfall may cause rainwater to enter the inlet of the second intake line, ultimately causing the engine to ingest a large amount of rainwater. Rainwater is an incompressible liquid. When the engine ingests a large amount of rainwater into the cylinder, the piston encounters the incompressible water during its upward movement during the compression stroke. Due to the limited strength of components such as the connecting rod and crankshaft, the strong resistance can cause catastrophic consequences such as connecting rod bending or fracture, piston crown bending, cylinder wall scratching, and even crankshaft fracture. Furthermore, water entering the cylinder can interfere with proper fuel injection and mixing, resulting in a mixture that is too lean (more water, less fuel) or too rich (less water, more fuel), causing incomplete combustion, reduced power, increased fuel consumption, and worsening emissions. Rainwater can also damage other components in the intake system. For example, rainwater can soak the air filter element, causing it to lose its filtering function, or even deform or block the intake duct, affecting air circulation. Another example is rainwater entering a supercharger, which can damage the high-speed impeller due to impact with water droplets, or wear the bearings due to poor lubrication caused by water ingress.

[0088] Based on the above problems, the embodiment of the present disclosure controls the first air intake pipe to be connected and controls the second air intake pipe to be closed when it is determined that the rainfall is greater than the first preset rainfall. Since the air intake of the first air intake pipe is located in the first space inside the vehicle body, the first space is a relatively hidden space. For example, the first space can be the space on the inner side of the fender, which is shielded by the fender. Therefore, even when the rainfall is greater than the first preset rainfall, the air intake of the first air intake pipe cannot conduct a large amount of rainwater to the engine intake system and the engine, thereby greatly reducing the risk of the engine inhaling rainwater and reducing the possibility of the air filter being soaked by rainwater, which is beneficial to maintaining the normal operation and performance of the engine, and at the same time is beneficial to extending the service life of the intake system components.

[0089] It should be noted that rainfall information can be obtained using a rain sensor. For example, a rain sensor can be installed on the inside of the windshield, near the rearview mirror. A suitable rain sensor is an optical type. This sensor contains a light-emitting diode (LED) that emits an infrared beam toward the outer surface of the windshield. When the windshield is dry, most of the light is reflected back to the sensor's photodiode receiver. When rain falls, raindrops alter the refraction and reflection paths of light, reducing the intensity of the light received by the sensor. The heavier the rainfall, the more water on the windshield, the greater the deflection of the light, and the weaker the light received by the receiver. The rain sensor determines the intensity and frequency of rainfall by detecting changes in the intensity of the received infrared light. The degree of light intensity reduction is proportional to the amount of rain. The sensor converts these optical signals into electrical signals and transmits them to the vehicle's control unit. At this time, the first preset rainfall amount may correspond to the intensity of infrared light received by the rain sensor. The rain sensor converts the received light intensity change into an electrical signal or digital signal, and then determines the current rainfall level using a pre-set algorithm and threshold value. Rainfall levels may include, for example, no rain, light rain, moderate rain, heavy rain, and rainstorm. The first preset rainfall amount mentioned in the embodiment of the present disclosure may correspond to at least one of light rain, moderate rain, and heavy rain. When corresponding to moderate rain, if the rainfall is greater than the moderate rain level, air intake is adopted through the first air inlet. Of course, the present disclosure is not limited to this, and the first preset rainfall amount may be set according to actual needs.

[0090] In addition to considering the effects of ambient temperature and rainfall on the engine's intake system, the air quality index (AQI) also affects the system. When the AQI is high, the air filter becomes clogged more quickly. A clogged air filter restricts air flow, leading to insufficient air intake, reduced combustion efficiency, decreased power, and increased fuel consumption. At this point, the engine requires greater suction force to draw in sufficient air, increasing the load on the engine.

[0091] Based on the above problems, the embodiment of the present disclosure controls the first air intake duct to be open and the second air intake duct to be closed when the air quality index is greater than a first preset value. Since the air inlet of the first air intake duct is located in the first space in the vehicle body, the first space is a relatively hidden space. For example, the first space can be the space on the inside of the fender, which is shielded by the fender. When particulate matter pollution is serious, especially when there is a lot of dust on the ground, the air inlet of the first air intake duct can avoid directly inhaling air with a high impurity concentration, thereby reducing the coarse particulate matter entering the intake system. When the vehicle is driving, airflow will flow over the surface of the vehicle body. The design of the air inlet in the first space in the vehicle body usually takes advantage of this airflow direction, so that some larger particulate matter is thrown away or settled under the action of the airflow, reducing the number of particulate matter that directly hits and enters the air filter, which is equivalent to a preliminary layer of "airflow filtration." Since the number of coarse particles entering the air intake of the first intake pipe is relatively reduced, the burden on the air filter is reduced and the clogging rate is relatively slowed down. This helps to extend the service life of the air filter, maintain the engine's intake efficiency, and avoid problems such as power loss and increased fuel consumption due to insufficient air intake.

[0092] Optionally, the air quality index mentioned in the embodiment of the present disclosure is an index formed by converting the concentrations of various pollutants in the air. For example, the concentrations of PM2.5 (particles with a diameter of less than or equal to 2.5 microns in the air) and PM10 (particles with a diameter of less than or equal to 10 microns in the air) are converted into an air quality index. Different numerical ranges of the air quality index correspond to different control quality levels. For example, 0-50 represents excellent, 51-100 represents good, 101-150 represents light pollution, 151-200 represents moderate pollution, 201-300 represents heavy pollution, and 300 and above represents severe pollution. When the concentration of particulate matter such as PM2.5 and PM10 increases, excessive particulate matter will quickly clog the filter element of the air filter, reduce the intake efficiency, and shorten the life of the air filter. The first preset value mentioned in the embodiment of the present disclosure can be, for example, any value between 151-200. For example, when the air quality index is greater than 200, it represents heavy pollution, and the first intake pipe is selected for intake. Of course, the first preset value can be flexibly set according to actual conditions, and this disclosure does not specifically limit this.

[0093] Considering that the height of water splashes is directly related to the depth and speed of the water when the vehicle is driving on a flooded road, if the vehicle's wading depth is greater than the first preset wading depth and the vehicle's speed is greater than the first preset speed, the splashing water may directly enter the air intake of the second intake pipe, eventually causing the air filter to become wet. A wet filter element will seriously hinder air circulation, reducing the engine's intake efficiency, resulting in reduced power and increased fuel consumption. If water enters the engine cylinder, since water is an incompressible liquid, when the piston is compressed upward, it will encounter huge resistance, causing the connecting rod to bend, the piston to deform, the crankshaft to damage, and even the cylinder block to rupture. This is commonly known as "cylinder explosion." Therefore, when the vehicle's wading depth is greater than the first preset wading depth and the vehicle speed is greater than the first preset speed, the first air intake pipe is opened and the second air intake pipe is closed. Since the air intake of the first air intake pipe is located in the first space inside the vehicle body, the first space is a relatively hidden space. For example, the first space can be the space on the inside of the fender. The space is shielded by the fender, and the splashing water in the wading section is not easy to enter the first space, which is beneficial to reduce or block water from entering the first air intake pipe. This helps to extend the service life of the air filter, maintain the engine's intake efficiency, and avoid the problem of power reduction and fuel consumption increase due to insufficient air intake.

[0094] It should be noted that the first wading depth and the first preset vehicle speed can be set according to actual conditions. When the wading depth is large, a smaller vehicle speed may result in higher water splash height. For example, if the first wading depth is any one of 450 mm to 550 mm, and may further be 500 mm, and the first preset vehicle speed is any one of 8 km / h to 15 km / h, water splash may reach the air inlet of the second air intake duct. The first preset vehicle speed may further be 10 km / h. When the wading depth is small, a larger vehicle speed may also result in higher water splash height. For example, if the first wading depth is any one of 40 mm to 60 mm, and may further be 50 mm, and the first preset vehicle speed is any one of 30 km / h to 60 km / h, water splash may reach the air inlet of the second air intake duct. The first preset vehicle speed may further be 40 km / h.

[0095] The above embodiments describe several situations in which it is necessary to open the first air intake line and close the second air intake line. When the operating environment does not have the above situations, the second air intake line can be opened and the first air intake line can be closed to obtain a larger intake volume and air with a suitable temperature through the air intake on the front side of the engine compartment through the second air intake line, thereby increasing the intake density and improving combustion efficiency and fuel economy.

[0096] In an optional embodiment of the present disclosure, after controlling the closing of the first air intake line connected to the air intake port of the air filter and controlling the connection of the second air intake line connected to the air intake port of the air filter, it also includes: in response to the power of the engine being greater than a preset power, controlling the connection of the first air intake line connected to the air intake port of the air filter.

[0097] When the engine requires higher power output, such as during acceleration, overtaking, climbing a hill, high-speed driving, or towing a heavy object, the engine needs to deliver greater power in a short period of time, requiring a larger intake volume. While the second intake line is open, the first intake line can be further connected, allowing both the first and second intake lines to intake air simultaneously. This provides a greater intake flow rate, meeting the engine's air requirements at high power output and improving power performance. Given the correlation between engine speed and engine power, in practical applications, engine power can be determined by monitoring engine speed, but the present disclosure is not limited to this.

[0098] In an optional embodiment of the present disclosure, the control method of the engine intake system provided in the embodiment of the present disclosure further includes: controlling the on-off state of the first transmission pipeline and the second transmission pipeline between the supercharger and the engine throttle according to the operating environment information, wherein the first transmission pipeline includes an intercooler and the second transmission pipeline does not include an intercooler, that is, the air transmitted to the engine throttle through the first transmission pipeline is air cooled by the intercooler, and the air transmitted to the engine throttle through the second transmission pipeline is controlled to be uncooled air.

[0099] This embodiment introduces more refined control over the flow of charge air. A first transmission line connects the supercharger and the throttle valve and includes an intercooler. When the first transmission line is open, air from the air filter is supercharged by the supercharger, cooled by the intercooler, and then enters the engine. A second transmission line directly connects the supercharger and the throttle valve, bypassing the intercooler. When the second transmission line is open, air from the air filter is supercharged by the supercharger and enters the engine directly. By controlling the opening and closing of these two lines, the charge air can be flexibly controlled to determine whether to cool the charge air. For example, depending on the operating environment, the charge air can be cooled through the intercooler by opening the first transmission line and closing the second transmission line. The cooled air is then transferred to the engine through the first transmission line to increase intake air density. In low-temperature environments or when the engine is operating at low load, it may not be necessary or desirable to overcool the charge air. Opening the second transmission line and allowing air to enter through the second transmission line can reduce air flow resistance, improve boost response, and potentially reduce energy loss. Of course, in some cases, the first transmission line and the second transmission line can both be connected to mix the relatively low-temperature air in the first transmission line and the relatively high-temperature air in the second transmission line, so that the temperature of the air entering the engine reaches a better temperature, thereby increasing the intake density, improving combustion efficiency and fuel economy.

[0100] Several feasible operating scenarios of the first transmission pipeline and the second transmission are described below.

[0101] In an optional embodiment of the present disclosure, the operating environment includes ambient temperature; and controlling the on-off state of the first transmission line and the second transmission line between the supercharger and the engine throttle according to the operating environment information includes: controlling at least one of the first transmission line between the supercharger and the engine throttle and the second transmission line between the supercharger and the engine throttle to be conductive according to the operating environment information.

[0102] This embodiment further clarifies three working conditions for the first transmission line and the second transmission line. The first condition is to open the first transmission line and close the second transmission line, which is applicable, for example, to a solution where the external ambient temperature is high and the air output from the supercharger needs to be cooled. The second condition is to open the second transmission line and close the first transmission line, which is applicable, for example, to a solution where the external ambient temperature is low and the air output from the supercharger does not need to be cooled. The third condition is to open the first transmission line and the second transmission line at the same time, which is applicable to a situation where the air temperature needs to be adjusted and the air flow rate needs to be increased by mixing the cold air in the first transmission line with the relatively high temperature air in the second transmission line. The present disclosure can provide a wider range of control possibilities according to different driving scenarios and operating environment conditions, and can select the most appropriate charge air path according to specific operating requirements to achieve more precise control of the intake temperature and air flow, thereby optimizing engine performance, fuel economy and emissions.

[0103] Figure 3 The figure shows a flow chart for controlling the working status of the first transmission pipeline and the second transmission pipeline. Figure 3 In an optional embodiment of the present disclosure, controlling at least one of a first transmission line and a second transmission line between the supercharger and the engine throttle to be conductive according to the operating environment information includes:

[0104] Step S21: Determine whether the ambient temperature is lower than a second preset temperature.

[0105] Step S22: When the ambient temperature is lower than a second preset temperature, the first transmission line between the supercharger and the engine throttle is controlled to be closed, and the second transmission line between the supercharger and the engine throttle is controlled to be open.

[0106] Step S23: When the ambient temperature is greater than or equal to the second preset temperature, determine whether the ambient temperature is less than a third preset temperature, wherein the third preset temperature is higher than the second preset temperature.

[0107] Step S24: When the ambient temperature is lower than a third preset temperature, control the first transmission line between the supercharger and the engine throttle and the second transmission line between the supercharger and the engine throttle to be conductive.

[0108] Step S25: When the ambient temperature is greater than or equal to a third preset temperature, the first transmission line between the supercharger and the engine throttle is controlled to be connected, and the second transmission line between the supercharger and the engine throttle is controlled to be closed.

[0109] This embodiment provides a solution for controlling the charge air path based on ambient temperature. When the ambient temperature falls below a second preset temperature (e.g., 0°C or below, or optionally -5°C), the first transmission line is closed and the second transmission line is opened. This eliminates the need for intercooler cooling, allowing the warmer charge air to enter the engine directly through the second transmission line. This helps quickly raise engine temperature, improves cold start performance, and potentially reduces intake resistance. Furthermore, if the ambient temperature is below freezing and the air humidity is high, water vapor in the air may condense into water droplets on the intercooler's fins or internal channels as it passes through the intercooler. The pressurized air experiences a certain pressure drop as it passes through the intercooler. According to gas laws, this pressure drop further lowers the temperature, increasing the risk of ice formation. Ice can block the air passages within the intercooler, severely restricting air flow to the engine, resulting in a significant decrease in engine power or even malfunction. A clogged intercooler also increases the burden on the supercharging system and may adversely affect components such as the supercharger. Furthermore, if the ambient temperature is below freezing, condensed water vapor in the EGR (Exhaust Gas Recirculation) system downstream of the intercooler can also easily freeze, affecting normal engine air intake, resulting in reduced combustion efficiency and insufficient power. Therefore, when the ambient temperature is below a second preset temperature, the first transmission line is closed and the second transmission line is opened. This allows the supercharged, high-temperature air to enter the engine directly through the second transmission line without being cooled by the intercooler. This reduces the chance of wet, cold air remaining in the low-temperature intercooler for an extended period of time, thereby reducing the possibility of water vapor condensation, ensuring a smooth intake system, maintaining normal engine performance and reliability, and protecting the intercooler from damage.

[0110] When the ambient temperature is greater than or equal to a second preset temperature (e.g., 0°C or below, further optionally -5°C) and less than a third preset temperature (e.g., any temperature between 0°C and 10°C), transitional cooling of the charge air through the intercooler and transmission to the engine through the first transmission line may reduce the atomization effect of the fuel, affecting combustion efficiency. If the higher temperature air output by the supercharger is directly transmitted to the engine through the second transmission line without cooling through the intercooler, no cooling at all may result in excessively high intake air temperature, increasing the risk of knock. Therefore, in this case, the first transmission line and the second transmission line can be opened simultaneously, and the air cooled by the intercooler in the first transmission line is mixed with the higher temperature air in the second transmission line to form air of suitable temperature. The appropriate intake air temperature contributes to better fuel atomization and combustion, thereby improving combustion efficiency and reducing fuel consumption. In addition, by simultaneously conducting the first transmission line and the second transmission line, the charge air can be cooled to a certain extent without excessive cooling, thereby increasing the intake density and thus the amount of oxygen entering the cylinder, which helps to improve the engine's power output and torque performance, especially when a certain acceleration or load is required.

[0111] When the ambient temperature is greater than or equal to the third preset temperature, in this embodiment, the charge air is completely cooled by the intercooler, that is, the first intake line is opened and the second intake line is closed to reduce the intake temperature, increase the intake density, and prevent detonation, thereby ensuring the stability and power of the engine in a high-load and high-temperature environment.

[0112] This embodiment selects the operating status of the first and second transmission lines based on ambient temperature, dynamically adjusting intake air temperature and achieving more intelligent engine thermal management. In low-temperature environments, only the second transmission line is open, helping the engine reach optimal operating temperature more quickly and optimizing cold-start performance and warm-up speed. In medium- and low-temperature environments, both the first and second transmission lines are open simultaneously. By flexibly controlling the cooling level, unnecessary cooling losses can be reduced, improving fuel efficiency. In high-temperature environments, only the first transmission line is open, fully cooling the charge air and ensuring engine power output and reliability.

[0113] The following embodiments will illustrate the specific on-off control method of the first transmission pipeline and the second transmission pipeline.

[0114] In an optional embodiment of the present disclosure, according to the operating environment, one of the first transmission line between the intercooler and the engine throttle and the second transmission line between the supercharger and the engine throttle is controlled to be connected and the other is closed, including: according to the operating environment, controlling the first passage of the second three-way valve to be connected and the second passage to be closed; or controlling the first passage of the second three-way valve to be closed and the second passage to be connected.

[0115] According to the operating environment, controlling the first transmission line between the intercooler and the engine throttle and the second transmission line between the supercharger and the engine throttle to be conductive includes: controlling the first passage and the second passage of the second three-way valve to be conductive.

[0116] The first passage of the second three-way valve is communicated with the first transmission pipeline, and the second passage of the second three-way valve is communicated with the second transmission pipeline.

[0117] This embodiment specifically illustrates the use of a second three-way valve to achieve on-off control of the first and second transmission lines. This second three-way valve can be used to connect either or both of the first and second transmission lines. By controlling the states of the different pathways of the second three-way valve, the flow of pressurized air can be conveniently switched and mixed. This embodiment utilizes a single second three-way valve to achieve on-off control of the first and second transmission lines, simplifying the control mechanism. Compared to using multiple valves, this embodiment offers a more compact structure and higher reliability.

[0118] Based on the same inventive concept, the present disclosure provides an engine intake system, Figure 4 The figure shows a structural schematic diagram of the engine intake system provided by an embodiment of the present disclosure, wherein the intake system includes: an air filter 20, a first air intake pipe 31, a second air intake pipe 32 and a controller 30, wherein the air filter 20 is used to transmit filtered air to the engine; the first air intake pipe 31 is connected to the air intake port of the air filter 20; the air intake port K1 of the first air intake pipe 31 is located in the first space in the vehicle body; the second air intake pipe 32 is connected to the air intake port of the air filter 20; the air intake port K2 of the second air intake pipe 32 is located outside the engine cabin; the controller 30 is configured to control the on and off states of the first air intake pipe 31 and the second air intake pipe 32.

[0119] The engine air intake system provided by the present disclosure is provided with two independent air intake pipes, namely a first air intake pipe 31 and a second air intake pipe 32. The air intake port K1 of the first air intake pipe 31 is located in a first space within the vehicle body. This first space is relatively closed and can effectively prevent dust, rain, snow and other impurities in the external environment from directly entering the first air intake pipe 31, thereby protecting the air filter 20 and the engine from contamination and preventing impurities from damaging the air filter 20 and the engine. The air intake port K2 of the second air intake pipe 32 is located outside the engine compartment. For example, when the engine compartment is a front-mounted structure (located in front of the cab), the air intake port K2 of the second air intake pipe 32 can be located at the front side of the engine compartment. In this case, the air intake port K2 of the second air intake pipe 32 can directly face the direction of the vehicle's movement, which is conducive to the introduction of air with lower external temperature and higher density, thereby improving the engine combustion efficiency and increasing the engine power output. When the engine compartment is a rear-mounted structure (located behind the cab), the air intake K2 of the second air intake duct 32 can be set at the rear or side of the engine compartment, away from the exhaust pipe. The air intake K2 of the second air intake duct 32 can also be set at a suitable position such as on both sides of the rear bumper, so that the airflow of the vehicle body can be used for air intake.

[0120] The engine intake system provided in the disclosed embodiment has two independent intake lines. Therefore, the on / off states of the first intake line 31 and the second intake line 32 can be controlled by a controller 30 based on the vehicle's operating environment. For example, in harsh environments such as heavy rain or a sandstorm, if the second intake line 32 is opened, since the air inlet K2 of the second intake line 32 is located outside the engine compartment and is directly exposed to the external environment, impurities such as rainwater and dust will enter the second intake line 32 and the air filter 20 through the exposed air inlet K2. This will shorten the life of the air filter 20, reduce its filtering capacity, significantly increase intake resistance, reduce intake efficiency, and increase fuel consumption. Furthermore, it will increase the amount of impurities entering the engine, potentially causing engine wear and shortening its life. Furthermore, if rainwater enters the engine through the second intake line 32 and the air filter 20, it may cause the engine to stall or crack the bearings, damaging the engine. Therefore, in harsh environments such as heavy rain or sandstorms, only the first intake line 31 can be opened while the second intake line 32 is closed. Since the air inlet of the first intake line 31 is relatively closed and not directly exposed to the external environment, it can prevent impurities such as rainwater or sand from entering the first intake line 31. This can greatly reduce the impact of impurities on the air filter 20 and the engine, avoiding the problems of impurities causing reduced life of the air filter 20 and engine life or damage. At the same time, when air is drawn through the first intake line in harsh environments, the air filter is prevented from being clogged by impurities or water. Therefore, even in harsh environments, the first intake line can maintain a relatively stable intake resistance, ensuring that the engine can inhale sufficient, relatively clean air for combustion, avoiding the problems of a sharp drop in intake efficiency and deterioration in fuel efficiency (increased fuel consumption) caused by severe air filter clogging. This helps improve intake efficiency and reduce fuel consumption in harsh environments.

[0121] When the operating environment is favorable and road conditions are good, the second air intake line 32 can be opened and the first air intake line 31 closed. Because the air inlet K2 of the second air intake line 32 is located outside the engine compartment, it can receive relatively low-temperature, low-density, and high-flow air from the outside during vehicle operation. This low-temperature, high-density, high-flow air helps improve engine combustion efficiency, thereby increasing engine power output and improving fuel economy. Furthermore, if the air inlet K2 of the second air intake line 32 is located farther from the cab, such as in front of the engine compartment, it can also help reduce the impact of intake noise on the user.

[0122] Therefore, the engine air intake system provided by the embodiment of the present disclosure can intelligently utilize the intake air from different positions according to the actual operating environment of the vehicle, and can provide the engine with better quality intake air under different operating environments, thereby showing significant technical effects in improving performance, improving fuel economy, extending component life and improving adaptability to harsh environments, thereby overcoming the shortcomings of traditional single air intake systems that are difficult to take into account under various working conditions.

[0123] It should be noted that in the engine intake system provided in the embodiment of the present disclosure, the controller 30 can be embodied as the vehicle's ECU (Electronic Control Unit), for example. The ECU plays a vital role in the structure of a vehicle and can be considered the "brain" of the vehicle. It is an embedded system that receives data from various sensors throughout the vehicle and processes it using preset software and algorithms, thereby controlling and managing one or more electronic systems of the vehicle in real time. In some other embodiments of the present disclosure, other structures provided with preset programs can also be used as the controller of the present disclosure, and the present disclosure does not specifically limit this.

[0124] In an optional embodiment of the present disclosure, the engine intake system includes a switching valve, and a controller is used to control the conduction state of the switching valve. The switching valve is located between a first intake line and the intake pipe of the air filter, and between a second intake line and the intake pipe of the air filter. By controlling the switching valve by the controller, the conduction state of the first intake line and the second intake line can be controlled.

[0125] Please continue to refer to Figure 4 In an optional embodiment of the present disclosure, the switching valve includes a first three-way valve 81, a first input port of the first three-way valve 81 is connected to the first intake pipe 31, a second input port of the first three-way valve 81 is connected to the second intake pipe 32, and an output port of the first three-way valve 81 is connected to the intake pipe of the air filter 20.

[0126] By introducing the first three-way valve 81 in this embodiment, flexible switching and combined use of the first and second intake lines 31, 32 can be achieved. This allows precise selection of only one intake line to deliver air to the air filter 20, while completely shutting off the other. Furthermore, through control, both the first and second intake lines 31, 32 can be simultaneously opened, allowing air from both lines to mix. Compared to the method of providing independent on / off valves on each intake line, a single three-way valve in this embodiment enables switching and combined control of both intake lines, simplifying the structure and control logic of the entire intake system.

[0127] In addition to being embodied as the first three-way valve mentioned in the above embodiment, the switching valve can also be embodied as other structures. For example, the switching valve may include a first switching valve and a second switching valve. The first switching valve is arranged between the first intake pipe and the air inlet of the air filter, and the second switching valve is arranged between the second intake pipe and the air inlet of the air filter. By controlling the first switching valve and the second switching valve, flexible switching and combined use of the first intake pipe and the second intake pipe can also be achieved. The present disclosure does not limit this.

[0128] Please continue to refer to Figure 4 In an optional embodiment of the present disclosure, the engine air intake system further includes a supercharger 40, a first transmission line 61, and a second transmission line 62. The air intake end of the supercharger 40 is connected to the air outlet of the air filter 20, and is used to compress the air output by the air filter 20. The first transmission line 61 and the second transmission line 62 are connected in parallel between the supercharger 40 and the engine throttle. The supercharger 40 is used to receive air filtered by the air filter and transmit the compressed air to the engine through the first transmission line 61 and / or the second transmission line 62. The first transmission line 61 includes the intercooler 50.

[0129] Specifically, the outlet of the supercharger 40 is connected to the inlet of the intercooler 50 in the first transmission line 61 and the inlet of the second transmission line 62, respectively. The outlet of the intercooler 50 and the outlet of the second transmission line 62 are connected to the engine throttle 70. Optionally, a second three-way valve 82 is further included, connected between the first transmission line 61, the second transmission line 62, and the engine throttle 70. For example, a first input port of the second three-way valve 82 is connected to the first transmission line 61, a second input port of the second three-way valve 82 is connected to the second transmission line 62, and an output port of the second three-way valve 82 is connected to the engine throttle 70.

[0130] In some other embodiments of the present disclosure, the position of the second three-way valve 82 can also be adjusted, for example, please refer to Figure 5 The second three-way valve 82 is connected between the outlet of the supercharger 40, the inlet of the intercooler 50 in the first transmission pipeline 61, and the inlet of the second transmission pipeline 62. The outlet of the intercooler 50 is connected to the throttle valve 70 of the engine, and the outlet of the second transmission pipeline 62 is connected to the throttle valve 70 of the engine. Figure 5FIG2 shows another schematic diagram of the structure of an engine intake system according to an embodiment of the present disclosure. In this embodiment, the input port of the second three-way valve 82 is connected to the outlet port of the supercharger 40, the first output port of the second three-way valve 82 is connected to the intake port of the intercooler 50 in the first transmission pipeline 61, and the second output port of the second three-way valve 82 is connected to the intake port of the second transmission pipeline 62, thereby similarly achieving intake control for the first transmission pipeline 61 and the second transmission pipeline 62.

[0131] This embodiment introduces more refined control over the flow of supercharged air. When the first transmission line 61 is turned on, it means that the air output from the air filter 20 is supercharged by the supercharger 40 and then cooled by the intercooler 50 before entering the engine. The second transmission line 62 directly connects the supercharger 40 and the throttle valve 70, bypassing the intercooler 50. When the second transmission line 62 is turned on, it means that the air output from the air filter 20 is supercharged by the supercharger 40 and then directly enters the engine without being cooled by the intercooler 50. By controlling the on and off of these two lines, it is possible to flexibly choose whether to cool the supercharged air. For example, depending on different operating environments, the supercharged air can be cooled by passing through the intercooler 50, that is, the first transmission line 61 is turned on and the second transmission line 62 is closed, and the cooled air is transmitted to the engine through the first transmission line 61 to increase the intake density. In low-temperature environments or when the engine is operating at low load, overcooling of the charge air may be unnecessary or unnecessary. The bypass intercooler 50 can reduce air flow resistance, improve boost response speed, and potentially reduce energy loss. Of course, in some cases, both the first and second transmission lines 61 and 62 can be connected to allow the relatively cooler air in the first transmission line 61 to mix with the relatively warmer air in the second transmission line 62. This allows the air entering the engine to reach an optimal temperature, thereby increasing intake air density and improving combustion efficiency and fuel economy.

[0132] It should be noted that the present disclosure does not limit the structure of the first three-way valve 81 and the second three-way valve 82. Various feasible three-way valve structures, such as electronic three-way valves and mechanical three-way valves, may be used. The air filter medium can be made of various materials, such as paper, metal mesh, etc., and this disclosure does not specifically limit this.

[0133] The engine intake system and control method thereof provided by the present disclosure will be further described below.

[0134] Considering that conventional engine air intake systems are located inside the cabin, the air intake cannot absorb cooler air from the outside, resulting in poor engine intake efficiency. Rainy days or water-crossing conditions can easily damage the engine. For example, if the air intake is located outside during driving in rainy or water-crossing conditions, large amounts of water can easily enter the engine, causing engine stall or bearing cracking, resulting in damage. Furthermore, high levels of dust and other impurities in the ambient air can easily cause engine wear and reduce engine life. Excessive dust and impurities in the environment (such as on rural dirt roads or in off-road conditions) can cause a large amount of dust and impurities to enter the air filter, but since dust is not completely filtered, more dust and impurities ultimately enter the engine, causing wear and shortening engine life. Furthermore, the supercharged air is cooled by the intercooler before being transferred to the throttle valve, resulting in a long transfer path, low engine intake efficiency, high fuel consumption, and high pollutant emissions. This is because high intake resistance in the engine results in insufficient air intake, incomplete combustion, and high fuel consumption and increased pollutant emissions. Moreover, the pressurized gas is cooled by the intercooler and then transferred to the throttle valve. However, the ambient temperature is already very low in winter, and cooling by the intercooler will cause engine icing problems. For example, the water generated by the engine's own low-pressure EGR system can easily form ice behind the intercooler, causing engine failure.

[0135] To address the above challenges, the engine air intake system provided by the present disclosure incorporates a first and second air intake line. For example, the air intake of the first air intake line can be introduced from within the fender, effectively preventing contamination from impurities such as dust, water, and snow. The air intake line automatically selects the appropriate air intake path based on road conditions, ensuring air quality. The air intake of the second air intake line fully utilizes the front end of the engine compartment to achieve low-temperature air intake. This allows the vehicle to automatically select the optimal air intake path based on demand under varying road conditions and operating conditions, improving air intake efficiency, reducing energy consumption and emissions, and achieving more environmentally friendly and efficient engine operation. Furthermore, a first and second air transfer line are provided at the outlet of the supercharger. The first air transfer line is connected between the intercooler and the engine's throttle to cool the pressurized air when the temperature is too high. The second air transfer line is connected between the supercharger and the engine's throttle to reduce air flow resistance. When the air temperature is below a specified value, the air enters the system directly, improving air intake efficiency. The intake control in the embodiment of the present disclosure is performed by the ECU based on real-time monitoring of ambient temperature and pressure, intelligently controlling the intake efficiency of the vehicle under different operating conditions, thereby reducing fuel consumption and pollutant emissions.

[0136] This disclosed embodiment utilizes a dual-path intake design, balancing low-temperature air intake and impurity filtration, automatically selecting the intake path based on the vehicle's operating environment. The intercooler's dual channels are flexibly utilized to adapt to varying boost gas temperatures, reducing unnecessary cooling energy consumption and improving intake efficiency. Real-time ECU monitoring and control ensures maximum intake efficiency and optimizes engine performance under all operating conditions.

[0137] In the control method of the engine intake system provided by the present disclosure, intelligent intake route selection and gas cooling control are adopted to achieve efficient operation of the engine in various environments. The precise monitoring and intelligent adjustment of the ECU greatly improve the adaptability and efficiency of the intake strategy. The dual transmission pipeline design of the dual-path intake pipe and the supercharger outlet effectively solves the problems existing in the existing engine intake system. It can avoid the EGR condensed water vapor after the intercooler freezing due to excessively low intake temperature in low temperature environments in winter, resulting in engine operation failure. Through the dual-path intake pipe design, since the air intake is arranged in front of the cabin and away from the cab, the impact of intake noise on the driver is reduced. The present disclosure can significantly improve the engine intake efficiency, directly reduce fuel consumption, and improve energy utilization. It effectively reduces automobile exhaust emissions and meets increasingly stringent environmental protection standards. The optimized intake strategy improves the overall performance of the engine, enhances user experience, and improves the market competitiveness of the car.

[0138] Based on the same inventive concept, the present disclosure further provides a vehicle including the engine intake system provided by the embodiment of the present disclosure. It should be noted that the vehicle provided by the embodiment of the present disclosure has all the beneficial effects of the above-mentioned engine intake system, which will not be repeated here.

[0139] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0140] Through the description of the above implementation methods, technical personnel in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0141] In the 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 schematic. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0142] In the description of the present disclosure, it should be understood that if the terms "up", "down", "front", "back", "left" and "right" are used to indicate directions or positional relationships, they are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the positions or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limitations of the present disclosure.

[0143] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. It should also be noted that the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, commodity, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, commodity, or device comprising the element.

[0144] The above are merely examples of the present disclosure and are not intended to limit the present disclosure. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure are intended to be included within the scope of the claims of the present disclosure.

Claims

1. A method for controlling an engine intake system, characterized in that: The control method includes: Obtain vehicle operating environment information; Controlling the on-off state of a first air intake line connected to the air intake port of the air filter and controlling the on-off state of a second air intake line connected to the air intake port of the air filter according to the operating environment information; In which, the air filter is used to filter the air introduced into the first air intake pipe and / or the second air intake pipe, and transmit the filtered air to the engine; the air inlet of the first air intake pipe is arranged in the first space in the vehicle body, and the air inlet of the second air intake pipe is located outside the engine compartment.

2. The control method of the engine intake system according to claim 1, characterized in that: The operating environment information includes at least one of ambient temperature, rainfall, air quality index, vehicle wading depth, and vehicle speed; and controlling the on-off state of a first air intake pipe connected to an air inlet of an air filter and the on-off state of a second air intake pipe connected to an air inlet of an air filter according to the operating environment information includes: According to the operating environment information, controlling one of a first air intake line connected to the air inlet of the air filter and a second air intake line connected to the air inlet of the air filter to be turned on and the other to be turned off; Alternatively, according to the operating environment information, the first air intake line connected to the air intake port of the air filter and the second air intake line connected to the air intake port of the air filter are controlled to be connected.

3. The control method of the engine intake system according to claim 2, characterized in that: The controlling, based on the operating environment information, one of a first air intake line connected to the air inlet of the air filter and a second air intake line connected to the air inlet of the air filter to be turned on and the other to be turned off includes: Determining whether the ambient temperature is less than a first preset temperature, whether the rainfall is greater than a first preset rainfall, whether the air quality index is greater than a first preset value, whether the vehicle wading depth is greater than a first preset wading depth, and whether the vehicle speed is greater than a first preset speed; If at least one condition is met, the first air intake line connected to the air inlet of the air filter is controlled to be open, and the second air intake line connected to the air inlet of the air filter is controlled to be closed; Otherwise, the first air intake line connected to the air intake port of the air filter is controlled to be closed, and the second air intake line connected to the air intake port of the air filter is controlled to be connected.

4. The control method of the engine intake system according to claim 3, characterized in that: After controlling the first air intake line connected to the air intake port of the air filter to be closed and controlling the second air intake line connected to the air intake port of the air filter to be opened, the method further includes: In response to the engine power being greater than a preset power, a first intake line connected to an intake port of an air filter is controlled to be open.

5. The control method of the engine intake system according to claim 1, characterized in that: Also includes: According to the operating environment information, the on-off states of a first transmission pipeline and a second transmission pipeline between the supercharger and the engine throttle are controlled, wherein the first transmission pipeline includes an intercooler.

6. The control method of the engine intake system according to claim 5, characterized in that: The operating environment includes an ambient temperature; and controlling the on / off state of a first transmission pipeline and a second transmission pipeline between the supercharger and the engine throttle according to the operating environment information includes: At least one of a first transmission line and a second transmission line between the supercharger and the engine throttle is controlled to be conductive according to the operating environment information.

7. The control method of the engine intake system according to claim 6, characterized in that: Controlling at least one of a first transmission line and a second transmission line between the supercharger and the engine throttle to be conductive according to the operating environment information includes: determining whether the ambient temperature is less than a second preset temperature; When the ambient temperature is lower than a second preset temperature, the first transmission line between the supercharger and the engine throttle is controlled to be closed, and the second transmission line is controlled to be opened; When the ambient temperature is greater than or equal to the second preset temperature, determining whether the ambient temperature is less than a third preset temperature, wherein the third preset temperature is higher than the second preset temperature; When the ambient temperature is lower than a third preset temperature, the first transmission line and the second transmission line between the supercharger and the engine throttle are controlled to be connected; When the ambient temperature is greater than or equal to a third preset temperature, the first transmission pipeline between the supercharger and the engine throttle is controlled to be connected, and the second transmission pipeline is controlled to be closed.

8. An engine air intake system, characterized in that: include: an air filter, which delivers filtered air to the engine; a first air intake line connected to an air inlet of the air filter; the air inlet of the first air intake line being located in a first space within the vehicle body; a second air intake line connected to an air inlet of the air filter; the air inlet of the second air intake line being located outside the engine compartment; The controller is configured to control the on / off status of the first air intake line and the second air intake line.

9. The engine air intake system according to claim 8, characterized in that: It also includes a switching valve, and the controller is used to control the conduction state of the switching valve; the switching valve is located between the first intake line and the intake pipe of the air filter, and between the second intake line and the intake pipe of the air filter.

10. The engine air intake system according to claim 8, characterized in that: The system further includes a supercharger, a first transmission line, and a second transmission line. The first transmission line and the second transmission line are connected in parallel between the supercharger and the engine throttle. The supercharger is used to receive air filtered by an air filter and compress the air before transmitting it to the engine through the first transmission line and / or the second transmission line. The first transmission line includes an intercooler.

11. A vehicle, characterized in that: The engine air intake system comprises any one of claims 8 to 10.

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