Vehicle air intake system, control method and vehicle

Abstract

The present invention discloses a vehicle air intake system, a control method, and a vehicle. The vehicle air intake system includes a first air intake channel formed by a supercharger, an intercooler, a throttle body, and an intake manifold connected in sequence; a second air intake channel, one end of the second air intake channel connected between the supercharger and the intercooler, and the other end connected to the throttle body; a temperature acquisition module for acquiring temperature signals; and a control valve disposed between the first air intake channel and the second air intake channel for controlling the switching of the first air intake channel and the second air intake channel. The present invention provides a second air intake channel to bypass the intercooler, thereby preventing the intercooler from further cooling the intake air and increasing the gas temperature in the intake manifold. Furthermore, the present invention also provides a control valve to switch between the first air intake channel and the second air intake channel. This not only solves the problem of throttle body icing, but also effectively utilizes the heat of air compression from the supercharger, thereby improving vehicle economy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle air intake, in particular to a vehicle air intake system, a control method and a vehicle. BACKGROUND

[0002] The vehicle air intake system is an important component of a vehicle, and is used to introduce fresh air into the engine cylinder of the vehicle, so its design and configuration will have an important influence on the performance, efficiency and emissions of the engine. The vehicle air intake system generally includes an air intake pipe, a resonance cavity, an air filter, a throttle body, a supercharger, an intake manifold and connecting pipelines, etc. Among them, the throttle body is a controllable valve for controlling air entering the engine cylinder, generally in electronic control mode, and its main function is to regulate the air flow entering the engine, so as to control the power output of the engine. If the electronic throttle body (hereinafter referred to as throttle body) is frozen and stuck, the opening of the throttle body cannot be adjusted, and thus the engine intake cannot be controlled, and eventually the vehicle speed becomes uncontrollable, which may trigger abnormal performance such as high idle speed, weak acceleration, and limping, affecting the normal use of the vehicle.

[0003] According to the investigation and fault simulation of the throttle body freezing fault vehicle appeared in the market, the principle of throttle body freezing is determined. Combined with Figure 1 , the air intake path of the vehicle air intake system is: air filter (i.e. air filter element) → supercharger → intercooler → throttle body → intake manifold → combustion chamber. The water vapor generated in the engine combustion process enters the crankshaft system through the piston ring sealing gap. When the vehicle runs in extremely cold environment, the oil gas containing high water vapor enters the intake manifold through the crankcase ventilation system partial load pipeline, and intersects with the cold air of the throttle body after the intercooler, condenses to form loose frost and adheres to the inner wall of the intake manifold, the inner wall of the throttle body and the throttle body valve plate. When the engine stops, due to the high temperature radiation in the cylinder and the residual high temperature gas in the cylinder entering the intake manifold through the opened intake valve, the temperature in the intake manifold increases, and the frost on the inner wall of the intake manifold and the throttle body melts to form liquid water flow, which flows to the throttle body spindle and valve plate. Thereafter, it condenses into ice in a low temperature environment.

[0004] Currently, the existing technology mainly adds a ring of water blocking structure (commonly known as water blocking rib) inside the intake manifold for the solution of the icing of the throttle body. This measure mainly stores part of the back temperature condensate through the water blocking structure to reduce the amount of condensate flowing into the throttle body valve body, thereby reducing the risk of the throttle body failing to run due to the icing of the valve plate. In addition, in addition to the scheme of adding a water blocking rib structure, the existing technology also develops an ice breaking strategy software, for example, increasing the locked-rotor capacity of the throttle body motor is a commonly used solution. The principle is that during the start-up moment and the self-checking of the throttle body, according to the position reaching condition of the throttle body valve plate, the software strategy drives the valve plate of the throttle body to rotate back and forth for two to three times to break the ice layer attached to the throttle body valve body, thereby restoring the normal rotation of the throttle body valve.

[0005] However, the above schemes have certain defects. For example, the height of the water blocking rib of the scheme of adding a water blocking rib structure inside the intake manifold directly affects the water storage amount in the intake manifold, and the height setting of the water blocking rib also affects the intake uniformity of each cylinder of the engine and cannot be adjusted at will. After the short-distance driving of the real vehicle is simulated, it is found that after a certain number of short-distance driving of the customer, the water storage amount in the intake manifold quickly reaches saturation, and the newly generated water amount will flow into the throttle body valve and remain thereafter. In the extremely cold environment, the ice is quickly cooled and frozen, that is, this scheme still cannot effectively avoid the risk of the icing and jamming of the throttle body.

[0006] For the scheme of developing an ice breaking strategy software, the scheme also has certain limitations, for example: (1) if the attached ice layer is too thick, the positive and negative beating of the throttle body valve plate cannot effectively break the ice; (2) the selection of the motor of the throttle body needs to be evaluated after the ice layer is broken, and if the ice layer cannot be broken, the motor of the intake valve will have the risk of locked-rotor erosion; (3) in extremely cold weather such as winter, the battery power of the vehicle is limited, and the limited power may cause the function limitation of the controller, and thus the ice breaking strategy of the throttle body cannot be effectively implemented. SUMMARY

[0007] The embodiments of the present application provide a vehicle intake system, a control method and a vehicle, aiming to solve the problem of the icing of the throttle body.

[0008] The embodiments of the present application provide a vehicle intake system, which comprises an engine control module, a supercharger, an intercooler, a throttle body and an intake manifold. The supercharger, the intercooler, the throttle body and the intake manifold are sequentially connected to form a first intake passage. The system further comprises:

[0009] A second intake passage, one end of the second intake passage is connected between the supercharger and the intercooler, and the other end of the second intake passage is connected to the throttle body.

[0010] A temperature acquisition module is connected with the engine control module and used to acquire a temperature signal, wherein the temperature signal comprises an intake air temperature signal and an ambient temperature signal.

[0011] A control valve is connected with the engine control module and arranged between the first intake passage and the second intake passage, and used to control opening and closing of the first intake passage and the second intake passage.

[0012] The engine control module is used to control switching of the first intake passage and the second intake passage through the control valve according to the temperature signal acquired by the temperature acquisition module.

[0013] Further, an auxiliary heating device is arranged in the intake manifold.

[0014] Further, the engine control module is connected with the auxiliary heating device, and the engine control module is further used to acquire an engine operating parameter and control opening and closing of the auxiliary heating device according to the engine operating parameter.

[0015] Further, a heating member is arranged on the throttle body.

[0016] Further, the engine control module is connected with the heating member, and the engine control module is further used to control opening and closing of the heating member according to the temperature signal acquired by the temperature acquisition module.

[0017] The embodiment of the application further provides a vehicle intake control method applied to the vehicle intake system as described in any one of the above.

[0018] After the vehicle is started, the vehicle intake is controlled through the first intake passage.

[0019] The temperature signal is acquired through the temperature acquisition module.

[0020] The temperature signal is compared with a first preset temperature threshold.

[0021] When the temperature signal does not reach the first preset temperature threshold, the second intake passage is switched to through the control valve, and the vehicle intake is controlled through the second intake passage.

[0022] Further, the method further comprises:

[0023] An engine operating parameter is acquired, wherein the engine operating parameter comprises a coolant temperature when the engine is stopped.

[0024] The coolant temperature is compared with a first preset coolant temperature threshold.

[0025] triggering a preset number of times of a risk count of water in the intake passage when the coolant temperature does not reach a first preset coolant temperature threshold value;

[0026] controlling a heating device to heat the intake manifold when the risk count of water in the intake passage reaches a preset number threshold value.

[0027] Further, the vehicle intake system further comprises:

[0028] acquiring a duration that the coolant temperature reaches a second preset coolant temperature threshold value when the coolant temperature reaches the second preset coolant temperature threshold value; wherein the second preset coolant temperature threshold value is greater than or equal to the first preset coolant temperature threshold value;

[0029] clearing the risk count of water in the intake passage if the duration reaches a preset time threshold value.

[0030] Further, the vehicle intake system further comprises:

[0031] comparing the temperature signal with a second preset temperature threshold value; wherein the second preset temperature threshold value is lower than the first preset temperature threshold value;

[0032] switching to a second intake passage by controlling a valve and controlling the vehicle intake by the second intake passage and controlling the heating device to start heating when the temperature signal does not reach the second preset temperature threshold value.

[0033] The embodiment of the present application also provides a vehicle comprising the vehicle intake system as described above.

[0034] The embodiment of the present application provides a vehicle air intake system, a control method and a vehicle, the vehicle air intake system comprises an engine control module, a supercharger, an intercooler, a throttle body and an air intake manifold, the supercharger, the intercooler, the throttle body and the air intake manifold are sequentially communicated to form a first air intake channel, and the system further comprises: a second air intake channel, one end of the second air intake channel is connected between the supercharger and the intercooler, and the other end is connected to the throttle body; a temperature acquisition module for acquiring a temperature signal; a control valve arranged between the first air intake channel and the second air intake channel and used for controlling the opening and closing of the first air intake channel and the second air intake channel; wherein the engine control module is used for switching control of the first air intake channel and the second air intake channel through the control valve according to the temperature signal acquired by the temperature acquisition module. The embodiment of the present application is provided with the first air intake channel composed of the supercharger, the intercooler, the throttle body and the air intake manifold, and the second air intake channel is further provided, the second air intake channel is directly connected between the supercharger and the throttle body, so that the bypass short circuit of the intercooler can be realized, when the air intake of the second air intake channel is used, the further cooling of the air intake by the intercooler can be avoided, so that the compressed heat of the air intake by the supercharger can be fully utilized, and the temperature of the gas in the air intake manifold is improved. Meanwhile, the control valve is arranged at the intersection of the first air intake channel and the second air intake channel, and the control valve is controlled in combination with the engine control module and the temperature acquisition module, so that the orderly switching of the first air intake channel and the second air intake channel is realized, so that the icing problem of the throttle body can be effectively solved, and the effective utilization of the air compression heat of the supercharger can be realized, so that the economy of the vehicle is improved. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0036] Figure 1 The schematic diagram of the icing principle of the throttle body in the prior art;

[0037] Figure 2 The schematic block diagram of the vehicle air intake system provided by the embodiment of the present application;

[0038] Figure 3 The structural schematic diagram of the air intake manifold in the vehicle air intake system provided by the embodiment of the present application;

[0039] Figure 4 The structural schematic diagram of the throttle body in the vehicle air intake system provided by the embodiment of the present application;

[0040] Figure 5 Another schematic block diagram of a vehicle air intake system provided by an embodiment of the present application;

[0041] Figure 6 A flowchart of a vehicle air intake method provided by an embodiment of the present application;

[0042] Figure 7 Another flowchart of a vehicle air intake method provided by an embodiment of the present application. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0044] It should be understood that the terms "comprising" and "including" as used in the specification and the appended claims indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0045] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0046] It should be further understood that the term "and / or" as used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0047] Please see Figure 2 The embodiment of the present application provides a vehicle air intake system, which comprises an engine control module 1, a supercharger 2, an intercooler 3, a throttle body 4 and an intake manifold 5, the supercharger 2, the intercooler 3, the throttle body 4 and the intake manifold 5 are sequentially communicated to form a first air intake passage 10, and the system further comprises:

[0048] A second air intake passage 20, one end of the second air intake passage 20 is connected between the supercharger 2 and the intercooler 3, and the other end is connected to the throttle body 4;

[0049] The temperature collection module 6 is connected with the engine control module 1 and is used for collecting temperature signals; wherein the temperature signals include intake air temperature signals and ambient temperature signals;

[0050] The control valve 7 is connected with the engine control module 1 and is arranged between the first intake passage 10 and the second intake passage 20, and is used for controlling the opening and closing of the first intake passage 10 and the second intake passage 20;

[0051] The engine control module 1 is used for switching and controlling the first intake passage 10 and the second intake passage 20 through the control valve 7 according to the temperature signals collected by the temperature collection module 6.

[0052] In the embodiment, the vehicle intake system is provided with two engine intake passages, i.e. the first intake passage 10 and the second intake passage 20. The first intake passage 10 is the original intake passage through the intercooler 3, and the second intake passage 20 is a bypass passage arranged at both ends of the intercooler 3. The second intake passage 20 is directly connected between the supercharger 2 and the throttle body 4, so that the bypass short connection of the intercooler 3 can be realized. When the intake air is taken through the second intake passage 20, the further cooling of the intake air by the intercooler 3 can be avoided, so that the compressed heat of the intake air by the supercharger 2 can be fully utilized to improve the temperature of the gas in the intake manifold 5. Meanwhile, the control valve 7 is arranged at the intersection of the first intake passage 10 and the second intake passage 20, and the control valve 7 is controlled by the engine control module 1 (ECM) and the temperature collection module 6 to realize the orderly switching of the first intake passage 10 and the second intake passage 20. In this way, not only can the icing problem of the throttle body 4 be effectively solved, but also the air compression heat of the supercharger 2 can be effectively utilized to improve the economy of the vehicle.

[0053] In some optional embodiments, the control valve 7 can be a three-way electromagnetic valve. The three-way electromagnetic valve is connected with the supercharger 2, the first intake passage 10 and the second intake passage 20 respectively, so that the intake air of the supercharger 2 flows into the first intake passage 10 or the second intake passage 20 according to the selection of the three-way electromagnetic valve. In other optional embodiments, the control valve 7 can also be a two-way electromagnetic valve, and two two-way electromagnetic valves are arranged. One two-way electromagnetic valve is arranged on the first intake passage 10 and is used for controlling the opening and closing of the first intake passage 10, and the other two-way electromagnetic valve is arranged on the second intake passage 20 and is used for controlling the opening and closing of the second intake passage 20. When the first intake passage 10 needs to be opened or closed, the engine control module 1 can send corresponding instructions to the two-way electromagnetic valve arranged on the first intake passage 10; when the second intake passage 20 needs to be opened or closed, the engine control module 1 can send corresponding instructions to the two-way electromagnetic valve arranged on the second intake passage 20.

[0054] In addition, the temperature acquisition module 6 can specifically include a whole vehicle ambient temperature sensor and an intake temperature pressure sensor (TMAP) arranged on the engine intake manifold 5. Thus, when acquiring the temperature signal through the temperature acquisition module 6, the whole vehicle ambient temperature signal and the intake temperature signal are specifically acquired (here, when not specifically described as the whole vehicle ambient temperature signal or the intake temperature signal, the temperature signal refers to the signal containing the whole vehicle ambient temperature signal and the intake temperature signal, and the same applies below). In an actual application scenario, after the vehicle is started, the first intake passage 10 normally intakes, the engine control module 1 acquires the whole vehicle ambient temperature signal and the intake temperature signal through the whole vehicle ambient temperature sensor and the intake temperature pressure sensor, respectively, then compares the whole vehicle ambient temperature signal and the intake temperature signal with a preset temperature threshold (for example, 0°C), and controls the control valve 7 according to the comparison result, for example, when the whole vehicle ambient temperature signal and the intake temperature signal are both greater than or equal to the preset temperature threshold, or any one is greater than or equal to the preset temperature threshold, the intake through the first intake passage 10 can be continued, and when the whole vehicle ambient temperature signal and the intake temperature signal are both less than the preset temperature threshold, the first intake passage 10 is switched to the second intake passage 20 through the control valve 7 to improve the gas temperature in the intake manifold 5. Further, the temperature signal is continuously acquired through the temperature acquisition module 6, for example, the intake temperature signal is acquired, and whether the intake temperature signal reaches another preset temperature threshold (for example, 10°C) is judged through the engine control module 1. When it is judged that the intake temperature signal reaches another preset temperature threshold, the second intake passage 20 can be closed through the control valve 7, and the first intake passage 10 is re-opened.

[0055] In an embodiment, as shown in Figure 3 The intake manifold 5 is provided with an auxiliary heating device 51.

[0056] Correspondingly, the engine control module 1 is connected with the auxiliary heating device 51, and the engine control module 1 is further used for acquiring an engine operating parameter, and performing on-off control on the auxiliary heating device 51 according to the engine operating parameter.

[0057] In this embodiment, the auxiliary heating device 51 is built in the intake manifold 5, and the engine control module 1 controls the auxiliary heating device 51, which can effectively improve the temperature in the intake manifold 5 as a whole, reduce the probability of the high water vapor oil gas entering the intake manifold 5 through the crankcase ventilation system part of the load pipeline and freezing and staying, and reduce the probability of the high-temperature radiation in the cylinder when the engine is stopped, the ice and snow in the intake manifold 5 is melted to form liquid water flow, thereby further reducing the possibility of the throttle body 4 rotating pin and valve plate freezing into ice.

[0058] In some alternative embodiments, the auxiliary heating device 51 can be a ceramic heating element (such as a PTC heating element) arranged in the closed cavity at the bottom of the intake manifold 5, or a metal heating element arranged in the intake cavity of the intake manifold 5. In combination with the above-mentioned auxiliary heating device 51, the intake manifold 5 can further comprise a temperature sensor 55 arranged in the closed cavity. Figure 3 In some alternative embodiments, the auxiliary heating device 51 can be a ceramic heating element (such as a PTC heating element) arranged in the closed cavity at the bottom of the intake manifold 5, or a metal heating element arranged in the intake cavity of the intake manifold 5. In combination with the above-mentioned auxiliary heating device 51, the intake manifold 5 can further comprise a temperature sensor 55 arranged in the closed cavity.

[0059] In actual application scenarios, after the vehicle starts, the engine control module 1 (ECM) collects engine operating parameters and vehicle modes, and monitors the temperature collected by the engine water temperature sensor in real time after the engine starts to work, so as to determine the coolant temperature value when the engine stops running. That is, when the engine stops, if the coolant temperature of the engine is higher than the calibrated threshold value (hereinafter referred to as the first preset coolant temperature threshold value, for example, 40°C), no other measures need to be taken. Otherwise, if the coolant temperature of the engine is lower than the calibrated threshold value (for example, ≤40°C), a one-time risk count of water in the intake port is triggered. Correspondingly, if the coolant temperature of the engine is lower than the calibrated threshold value for multiple times, a multiple-time risk count of water in the intake port is triggered. Further, if the risk count of water in the intake port reaches a certain number threshold, a risk determination of water in the intake port is triggered, at which time the engine control module 1 (ECM) controls the auxiliary heating device 51 of the intake manifold 5, that is, starts the auxiliary heating device 51 to increase the temperature of the intake manifold 5. If the risk count of water in the intake port does not reach the number threshold, during this period, if the coolant temperature of the engine is higher than another calibrated threshold value (hereinafter referred to as the second preset coolant temperature threshold value, for example, ≥70°C) and lasts for a certain time (for example, 600s) when the engine stops, the risk count of water in the intake port at this time is reset to zero, and the counting is restarted when the coolant temperature of the engine is lower than the calibrated threshold value next time.

[0060] Here, the threshold value of the risk count of water in the intake port system needs to be verified by a special test. The special test can be selected in a winter low-temperature environment, a user single-trip short-distance driving cycle (such as 1-1.5km), for example, a near-life scene from home to supermarket or unit, etc. After each cycle is completed, the water content is determined by detecting the oil amount, and the change of the oil water content with the increase of the cycle is recorded, so as to evaluate and determine the threshold value of the risk count of water in the vehicle model (for example, according to the water content of 6%, the risk count can be inversely calculated as 20 times, etc.).

[0061] In some preferred embodiments, the second intake passage 20 and the auxiliary heating device 51 can be combined to control the engine intake, or the second intake passage 20 or the auxiliary heating device 51 can be used alone to control the engine intake, so that the effect of reducing the high water vapor oil gas entering the intake manifold 5 through the crankcase ventilation system part load pipeline and freezing and staying can be achieved in steps and in different scenes, and the risk of ice condensation in the throttle body 4 rotating pin and valve plate can be reduced. For example, when the second intake passage 20 and the auxiliary heating device 51 are combined to control the engine intake, after the vehicle starts, the engine control module 1 collects temperature signals and compares the temperature signals with a preset temperature threshold to determine whether to switch the first intake passage 10 to the second intake passage 20, that is, when the temperature signal does not reach the preset temperature threshold, the first intake passage 10 is switched to the second intake passage 20 to increase the gas temperature in the intake manifold 5; on the other hand, the engine operating parameters and vehicle mode are collected, and the coolant temperature of the engine is obtained, and then the coolant temperature is compared with the calibration threshold, if the coolant temperature is lower than the calibration threshold, the crankshaft water risk count is triggered, after the count is triggered, it is judged whether the current number reaches the number threshold, if it reaches, the auxiliary heating device is started to increase the gas temperature in the intake manifold 5.

[0062] In an embodiment, as shown in FIG. 4, the throttle body 4 is provided with a heating element 41. Figure 4

[0063] Correspondingly, the engine control module 1 is connected with the heating element 41, and the engine control module 1 is further used to switch control the heating element 41 according to the temperature signal collected by the temperature acquisition module 6.

[0064] In this embodiment, the heating element 41 is arranged on the throttle body 4, so that the intake flowing through the throttle body 4 can be heated to avoid supercooled air condensing into frost here. Specifically, a heating rod can be added on the rotating shaft 42 of the valve 43 of the throttle body 4. In combination with Figure 5 , the engine control module 1 obtains the temperature signal through the temperature acquisition module 6, and then determines whether the heating element 41 needs to be turned on for heating according to the temperature signal, for example, when the corresponding temperature threshold is reached, the heating element 41 is turned on, and when the corresponding temperature threshold is not reached, the heating element 41 does not need to be turned on.

[0065] ​Further, the heating element 41 is combined with the second air inlet passage 20 to control the air inlet, for example, when the temperature signal reaches the first preset temperature threshold, neither the second air inlet passage 20 nor the heating element 41 is opened; when the temperature signal does not reach the first preset temperature threshold but reaches the second preset temperature threshold (i.e. the second preset temperature threshold is lower than the first preset temperature threshold), the second air inlet passage 20 is opened but the heating element 41 is not opened; when the temperature signal does not reach the second preset temperature threshold, the second air inlet passage 20 and the heating element 41 are both opened. It can be understood that the temperature signal in the embodiment includes the whole vehicle environment temperature signal and the air inlet temperature signal, and when the temperature signal is compared with the first preset temperature threshold and the second preset temperature threshold, the whole vehicle environment temperature signal and the air inlet temperature signal are compared with the first preset temperature threshold and the second preset temperature threshold. For example, when the whole vehicle environment temperature signal and the air inlet temperature signal both reach the first preset temperature threshold, it is determined that the temperature signal reaches the first preset temperature threshold. For another example, when the whole vehicle environment temperature signal reaches the first preset temperature threshold and the air inlet temperature only reaches the second preset temperature threshold but does not reach the first preset temperature threshold, it is also determined that the temperature signal reaches the first preset temperature threshold, and neither the second air inlet passage 20 nor the heating element 41 is opened. Of course, in other embodiments, the whole vehicle environment temperature signal and the air inlet temperature signal can be compared with different temperature thresholds, and at this time, the different temperature thresholds are collectively referred to as the first preset temperature threshold or the second preset temperature threshold, for example, the whole vehicle environment temperature signal is compared with the whole vehicle environment sub-temperature threshold under the first preset temperature threshold, and the air inlet temperature signal is compared with the air inlet sub-temperature threshold under the first preset temperature threshold.

[0066] As shown in Figure 6 The embodiment of the application further provides a vehicle air inlet control method, which is applied to the vehicle air inlet system as described in any one of the above embodiments, and the method comprises steps S101-S104.

[0067] In step S101, the vehicle air inlet is controlled through the first air inlet passage 10 after the vehicle is started.

[0068] In step S102, the temperature signal is collected through the temperature collection module 6.

[0069] In step S103, the temperature signal is compared with the first preset temperature threshold.

[0070] In step S104, when the temperature signal does not reach the first preset temperature threshold, the second air inlet passage 20 is switched to through the control valve 7, and the vehicle air inlet is controlled by the second air inlet passage 20.

[0071] In this embodiment, after the vehicle is started, the first intake passage 10 is normally used for air intake, the temperature signal is collected by the temperature collection module 6, then the temperature signal is compared with the preset temperature threshold, if the temperature signal reaches the preset temperature threshold, the first intake passage 10 continues to be used for air intake, and if the temperature signal does not reach the preset temperature threshold, the first intake passage 10 is closed by the control valve 7, and the second intake passage 20 is opened, so that the vehicle air intake is controlled by the second intake passage 20.

[0072] In addition to the first intake passage 10 composed of the supercharger 2, the intercooler 3, the throttle body 4 and the intake manifold 5, the second intake passage 20 is also provided in this embodiment, which is directly connected between the supercharger 2 and the throttle body 4, so that the bypass short circuit of the intercooler 3 can be realized. When the second intake passage 20 is used for air intake, the further cooling of the air intake by the intercooler 3 can be avoided, so that the compressed heat of the air intake by the supercharger 2 can be fully utilized, and the gas temperature in the intake manifold 5 is improved. At the same time, the control valve 7 is provided at the intersection of the first intake passage 10 and the second intake passage 20, and the control valve 7 is controlled by the engine control module 1 and the temperature collection module 6, so that the orderly switching of the first intake passage 10 and the second intake passage 20 is realized. In this way, not only can the icing problem of the throttle body 4 be effectively solved, but also the effective utilization of the air compression heat of the supercharger 2 can be realized, so as to improve the economy of the vehicle. It can be understood that the implementation subject of the vehicle air intake control method provided in this embodiment is the engine control module 1. Of course, in other embodiments, other control units can also be considered as the implementation subject of the vehicle air intake control method.

[0073] In a specific embodiment, the temperature acquisition module 6 includes a vehicle ambient temperature sensor and an intake air temperature and pressure sensor (TMAP) arranged on the engine intake manifold 5. In this way, when the temperature acquisition module 6 collects the temperature signal, the vehicle ambient temperature signal and the intake air temperature signal are respectively collected by the vehicle ambient temperature sensor and the intake air temperature and pressure sensor, and then the vehicle ambient temperature signal and the intake air temperature signal are compared with a preset temperature threshold (for example, 0°C), and the control valve 7 is controlled according to the comparison result. For example, when the vehicle ambient temperature signal and the intake air temperature signal are both greater than or equal to the preset temperature threshold or any one of them is greater than or equal to the preset temperature, air can continue to be taken in through the first intake channel 10, and when the vehicle ambient temperature signal and the intake air temperature signal are both less than the preset temperature threshold, the control valve 7 is used to switch from the first intake channel 10 to the second intake channel 20 to increase the gas temperature in the intake manifold 5. Furthermore, the temperature signal is continued to be collected through the temperature acquisition module 6, and the engine control module 1 determines whether the intake temperature signal reaches another preset temperature threshold (for example, 10°C). When it is determined that the intake temperature signal reaches another preset temperature threshold, the second intake channel 20 can be closed by the control valve 7, and the first intake channel 10 can be reopened.

[0074] Combine Figure 7 In one embodiment, the vehicle intake control method further includes: steps S201 to S204.

[0075] Step S201: collecting engine operating parameters; wherein the engine operating parameters include the coolant temperature when the engine is stopped;

[0076] Step S202: comparing the coolant temperature with a first preset coolant temperature threshold;

[0077] Step S203: When the coolant temperature does not reach the first preset coolant temperature threshold, triggering a preset Qutong water risk count;

[0078] Step S204 : When the Qutong water risk count reaches a preset threshold, the auxiliary heating device 51 is controlled to heat the intake manifold 5 .

[0079] Furthermore, the vehicle intake control method further includes steps S205 to S206.

[0080] Step S205: When the coolant temperature reaches a second preset coolant temperature threshold, obtaining a duration for the coolant temperature to reach the second preset coolant temperature threshold; wherein the second preset coolant temperature threshold is greater than or equal to the first preset coolant temperature threshold;

[0081] Step S206, if the duration reaches a preset time threshold, the risk of water in the crankshaft passage is cleared.

[0082] The present embodiment controls the auxiliary heating device 51 according to engine operating parameters, which can effectively increase the temperature in the intake manifold 5 as a whole, reduce the probability of high water vapor in the oil gas passing through the crankcase ventilation system pipeline into the intake manifold 5 and freezing and staying, and reduce the probability of high temperature radiation in the cylinder and the melting of ice in the intake manifold 5 when the engine is stopped, thereby further reducing the possibility of the throttle body 4 rotating and the valve plate freezing into ice.

[0083] Specifically, after the vehicle starts, the engine operating parameters and vehicle mode can be collected by the engine control module 1 (ECM), and after the engine starts to work, the temperature collected by the engine water temperature sensor is monitored in real time to determine the coolant temperature value when the engine stops. That is, when the engine stops, if the coolant temperature of the engine is higher than the calibrated threshold (hereinafter referred to as the first preset coolant temperature threshold, for example, 40°C), no other measures need to be taken. On the contrary, if the coolant temperature of the engine is lower than the calibrated threshold (for example, ≤40°C), the risk of water in the crankshaft passage is triggered once, and correspondingly, if the coolant temperature of the engine is lower than the calibrated threshold for multiple times, the risk of water in the crankshaft passage is triggered multiple times. Further, if the risk of water in the crankshaft passage reaches a certain number threshold, the risk of water in the crankshaft passage is determined, at which time the engine control module 1 (ECM) controls the auxiliary heating device 51 of the intake manifold 5, that is, starts the auxiliary heating device 51 to increase the temperature of the intake manifold 5. If the risk of water in the crankshaft passage does not reach the number threshold, during this period, when the engine stops, if the coolant temperature of the engine is higher than another calibrated threshold (hereinafter referred to as the second preset coolant temperature threshold, for example, ≥70°C) and lasts for a certain time (for example, 600s), the risk of water in the crankshaft passage at this time is cleared, and the counting is restarted when the coolant temperature of the engine is lower than the calibrated threshold next time.

[0084] Here, the threshold of the risk of water in the crankshaft passage needs to be verified by a special test. The special test verification can be selected in winter low temperature environment, user single trip short distance driving cycle (such as 1-1.5km), for example, from home to supermarket or unit and other near life scenes, the water content is determined by detecting the oil quantity after each cycle, and the change of the water content of the oil with the increase of the cycle is recorded, so as to evaluate and determine the threshold of the risk of water in the crankshaft passage of the vehicle (for example, according to the water content of 6%, the risk count can be inversely calculated as 20 times, etc.).

[0085] In some preferred embodiments, the second intake passage 20 and the auxiliary heating device 51 can be combined to control the engine intake, or the second intake passage 20 or the auxiliary heating device 51 can be used alone to control the engine intake, so that the effect of reducing the high water vapor oil gas entering the intake manifold 5 through the crankcase ventilation system part load pipeline and freezing and staying can be achieved in steps and in different scenes, and the risk of the throttle body 4 rotating pin and valve plate freezing into ice can be reduced.

[0086] In an embodiment, the vehicle intake control method further comprises:

[0087] comparing the temperature signal with a second preset temperature threshold, wherein the second preset temperature threshold is lower than the first preset temperature threshold;

[0088] when the temperature signal does not reach the second preset temperature threshold, switching the control valve 7 to the second intake passage 20, controlling the vehicle intake by the second intake passage 20, and controlling the heating element 41 to start heating.

[0089] In this embodiment, whether the heating element 41 needs to be started to heat is determined according to the temperature signal. For example, when the corresponding temperature threshold is reached, the heating element 41 is started, and when the corresponding temperature threshold is not reached, the heating element 41 does not need to be started.

[0090] Further, the heating element 41 and the second intake passage 20 are combined to control the intake. For example, when the temperature signal reaches the first preset temperature threshold, neither the second intake passage 20 nor the heating element 41 is started; when the temperature signal does not reach the first preset temperature threshold but reaches the second preset temperature threshold (i.e., the second preset temperature threshold is lower than the first preset temperature threshold), the second intake passage 20 is started but the heating element 41 is not started; when the temperature signal does not reach the second preset temperature threshold, the second intake passage 20 and the heating element 41 are started at the same time.

[0091] The embodiment of the present application also provides a vehicle comprising the vehicle intake system according to any one of the above.

[0092] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other. For the system disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part. It should be noted that those skilled in the art can make some improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0093] It is also to be noted that, as used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Furthermore, the use of the term "about" in relation to a reference number herein can include ±10% of the reference number unless specifically stated otherwise. Parenthetically, the use of "about" in relation to a reference number herein can include ±5% of the reference number unless specifically stated otherwise.

Claims

1. A vehicle air intake system, comprising an engine control module, a supercharger, an intercooler, a throttle body, and an intake manifold, wherein the supercharger, the intercooler, the throttle body, and the intake manifold are sequentially connected to form a first intake passage, characterized in that: The system further comprises: a second air intake passage, one end of the second air intake passage being connected between the supercharger and the intercooler, and the other end being connected to the throttle body; A temperature acquisition module connected to the engine control module and used to acquire temperature signals; wherein the temperature signals include intake air temperature signals and ambient temperature signals; a control valve connected to the engine control module and disposed between the first intake passage and the second intake passage, for controlling the opening and closing of the first intake passage and the second intake passage; Among them, the engine control module is used to control the switching of the first air intake channel and the second air intake channel through the control valve according to the temperature signal collected by the temperature collection module; collect engine operating parameters; wherein, the engine operating parameters include the coolant temperature when the engine is stopped; compare the coolant temperature with a first preset coolant temperature threshold; when the coolant temperature does not reach the first preset coolant temperature threshold, trigger a preset Qutong water risk count; when the Qutong water risk count reaches a preset number threshold, control the auxiliary heating device to heat the intake manifold.

2. The vehicle air intake system according to claim 1, characterized in that: An auxiliary heating device is provided in the intake manifold.

3. The vehicle air intake system according to claim 2, characterized in that: The engine control module is connected to the auxiliary heating device, and the engine control module is further used to collect engine operating parameters and perform on-off control of the auxiliary heating device according to the engine operating parameters.

4. The vehicle air intake system according to claim 1, characterized in that: A heating element is provided on the throttle body.

5. The vehicle air intake system according to claim 4, characterized in that: The engine control module is connected to the heating element, and the engine control module is further used to control the switching of the heating element according to the temperature signal collected by the temperature collection module.

6. A vehicle intake control method, applied to the vehicle intake system according to any one of claims 1 to 5, characterized in that: The method comprises: After the vehicle is started, the vehicle air intake is controlled through the first air intake passage; Collect temperature signals through the temperature acquisition module; comparing the temperature signal with a first preset temperature threshold; When the temperature signal does not reach the first preset temperature threshold, the control valve is used to switch to the second air intake passage, and the vehicle air intake is controlled by the second air intake passage.

7. The vehicle intake control method according to claim 6, characterized in that: Also includes: When the coolant temperature reaches a second preset coolant temperature threshold, obtaining a duration during which the coolant temperature reaches the second preset coolant temperature threshold; wherein the second preset coolant temperature threshold is greater than or equal to the first preset coolant temperature threshold; If the duration reaches a preset time threshold, the risk count of water content in the tortuosity is reset to zero.

8. The vehicle intake control method according to claim 6, applied to the vehicle intake system according to claim 5, characterized in that: Also includes: Comparing the temperature signal with a second preset temperature threshold; wherein the second preset temperature threshold is lower than the first preset temperature threshold; When the temperature signal does not reach the second preset temperature threshold, the control valve is used to switch to the second air intake passage, and the second air intake passage controls the vehicle air intake and controls the heating element to start heating.

9. A vehicle, characterized in that: The vehicle air intake system comprises the vehicle air intake system according to any one of claims 1 to 5.

Images