Vehicle air inlet system, control method and vehicle

Abstract

The invention discloses a vehicle air inlet system, a control method and a vehicle, the vehicle air inlet system comprises a first air inlet channel formed by sequentially communicating a supercharger, an intercooler, a throttle body and an air inlet manifold, and further comprises a second air inlet channel, one end of the second air inlet channel is connected between the supercharger and the intercooler, and the other end of the second air inlet channel is connected to the throttle body; the temperature acquisition module is used for acquiring a temperature signal; the control valve is arranged between the first air inlet channel and the second air inlet channel and used for controlling opening and closing of the first air inlet channel and the second air inlet channel. By arranging the second air inlet channel, bypass short connection of the intercooler is achieved, it is avoided that the intercooler further cools inlet air, and the temperature of air in the air inlet manifold is increased. Meanwhile, a control valve is further arranged, switching of the first air inlet channel and the second air inlet channel is achieved, in this way, the freezing problem of the throttle body can be solved, effective utilization of air compression heat of the supercharger can be achieved, and the economical efficiency of the vehicle is improved.

Description

Technical Field

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

[0002] The vehicle air intake system is an important part of the vehicle. The vehicle air intake system is used to introduce fresh air into the engine cylinder of the vehicle. Therefore, its design and configuration will have an important impact on the engine's performance, efficiency and emissions. The vehicle air intake system generally includes an air duct, a resonant cavity, an air filter, a throttle body, a supercharger, an intake manifold and connecting pipes. Among them, the throttle body is a controllable valve that controls the air entering the engine cylinder. It is generally electronically controlled. Its main function is to adjust the air flow entering the engine, thereby controlling the engine's power output. If the electronic throttle body (hereinafter referred to as the throttle body) is frozen and stuck, the throttle body opening cannot be adjusted, and then the engine's air intake cannot be controlled, and ultimately the vehicle speed cannot be controlled. This may trigger abnormal performance such as high idle speed, weak acceleration, and limp of the engine, affecting the normal use of the vehicle.

[0003] Based on the investigation and fault simulation of vehicles with throttle body icing failures in the market, the principle of throttle body icing was determined. Figure 1 The air intake path of the vehicle intake system is: air filter (i.e. air filter element) → supercharger → intercooler → throttle body → intake manifold → combustion chamber. The water vapor generated during the engine combustion process enters the crankshaft system through the piston ring seal gap. When the vehicle is running in an extremely cold environment, the oil and gas containing high water vapor enters the intake manifold through the partial load pipeline of the crankcase ventilation system, and intersects with the cold air of the throttle body after passing through the intercooler, condensing to form loose frost and adhering to the inner wall of the intake manifold, the inner wall of the throttle body and the throttle body valve plate. When the engine is stopped, due to the high temperature radiation in the cylinder and the residual high temperature gas in the cylinder entering the intake manifold through the open intake valve, the temperature inside the intake manifold rises, and the frost inside the intake manifold and on the throttle body melts due to the heat, forming a liquid water flow, which flows to the throttle body transfer pin and valve plate, and then condenses into ice in a low temperature environment.

[0004] At present, the existing technology's solution to throttle body ice is mainly to add a circle of water retaining structure (commonly known as water retaining ribs) on the inside of the intake manifold. This measure mainly uses the water retaining structure to store part of the warmed condensed water to reduce the amount of condensed water flowing into the throttle body valve body, thereby reducing the risk of the throttle body reporting a fault code due to the valve plate freezing. In addition, in addition to the solution of adding a water retaining rib structure, the existing technology also develops ice-breaking strategy software. For example, improving the throttle body motor's stalling ability is a commonly used solution. Its principle is to use the startup moment, when the throttle body is powered on for self-inspection, according to the throttle body valve plate position, to use the software strategy to drive the throttle body valve plate to quickly rotate back and forth two or three times, so as to break the ice layer attached to the throttle body valve body, thereby restoring the normal rotation of the throttle body valve.

[0005] However, all of the above solutions have certain defects. For example, for the solution of adding a water retaining rib structure to the intake manifold, the height of the water retaining rib will directly affect the amount of water stored in the intake manifold, and the height setting of the water retaining rib will also affect the uniformity of the intake of each cylinder of the engine, and it cannot be adjusted at will. After simulating short-distance driving by customers on the actual vehicle, it was found that after a certain number of short-distance driving by customers, the water storage in the intake manifold quickly reached saturation, and if the customer continued to drive, the newly generated water would flow into the throttle body valve and remain, and then quickly cool and freeze in an extremely cold environment. In other words, this solution still cannot effectively avoid the risk of throttle body freezing and jamming.

[0006] Regarding the solution of developing ice-breaking strategy software, this solution also has certain limitations, for example: (1) If the attached ice layer is too thick, it is impossible to effectively break the ice only by beating the throttle body valve plate in the positive and negative directions; (2) The throttle body motor should be selected after fully evaluating the ice layer. If it still cannot be broken, the intake valve motor will be at risk of stalling and burning; (3) In extremely cold weather such as winter, the vehicle battery has limited power, and low power may lead to controller function limitations, and the throttle body ice-breaking strategy cannot be effectively implemented. Summary of the invention

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

[0008] An embodiment of the present invention provides a vehicle 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, and the system further comprises:

[0009] 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 of the second air intake passage being connected to the throttle body;

[0010] 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;

[0011] a control valve connected to the engine control module and disposed between the first air intake passage and the second air intake passage, and used for controlling the opening and closing of the first air intake passage and the second air intake passage;

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

[0013] Furthermore, an auxiliary heating device is provided in the intake manifold.

[0014] Furthermore, the engine control module is connected to the auxiliary heating device, and the engine control module is also used to collect engine operating parameters and perform on-off control of the auxiliary heating device according to the engine operating parameters.

[0015] Furthermore, a heating element is provided on the throttle body.

[0016] Furthermore, the engine control module is connected to the heating element, and the engine control module is also used to control the switching of the heating element according to the temperature signal collected by the temperature collection module.

[0017] An embodiment of the present invention further provides a vehicle intake control method, which is applied to the vehicle intake system as described in any one of the above items, and the method includes:

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

[0019] Collect temperature signals through a temperature acquisition module;

[0020] comparing the temperature signal with a first preset temperature threshold;

[0021] 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.

[0022] Furthermore, it also includes:

[0023] Collecting engine operating parameters; wherein the engine operating parameters include coolant temperature when the engine is stopped;

[0024] comparing the coolant temperature with a first preset coolant temperature threshold;

[0025] When the coolant temperature does not reach the first preset coolant temperature threshold, a preset tritium water risk count is triggered;

[0026] When the risk count of water in the Qutong reaches a preset number threshold, the auxiliary heating device is controlled to heat the intake manifold.

[0027] Furthermore, it also includes:

[0028] When the coolant temperature reaches a second preset coolant temperature threshold, obtaining a duration for 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;

[0029] If the duration reaches a preset time threshold, the risk count of water content in the tortuosity is reset to zero.

[0030] Furthermore, it also includes:

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

[0032] 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.

[0033] An embodiment of the present invention further provides a vehicle, comprising the vehicle air intake system as described above.

[0034] An embodiment of the present invention provides a vehicle air intake system, a control method and a vehicle. The vehicle air intake system includes 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 connected in sequence to form a first intake channel. The system also includes: a second intake channel, one end of the second intake channel is connected between the supercharger and the intercooler, and the other end is connected to the throttle body; a temperature acquisition module, which is used to collect temperature signals; a control valve, which is arranged between the first intake channel and the second intake channel, and is used to control the switching of the first intake channel and the second intake channel; wherein the engine control module is used to switch and control the first intake channel and the second intake channel through the control valve according to the temperature signal collected by the temperature acquisition module. In addition to the first air intake passage composed of a supercharger, an intercooler, a throttle body and an intake manifold, the embodiment of the present invention also provides a second air intake passage, which is directly connected between the supercharger and the throttle body, so that the intercooler can be bypassed and short-circuited. When the second air intake passage is used to take in air, the intercooler can be prevented from further cooling the intake air, thereby making full use of the compression heat of the intake air by the supercharger to increase the gas temperature in the intake manifold. At the same time, the embodiment of the present invention also provides a control valve at the intersection of the first air intake passage and the second air intake passage, and controls the control valve in combination with the engine control module and the temperature acquisition module to achieve orderly switching between the first air intake passage and the second air intake passage, so that not only can the icing problem of the throttle body be effectively solved, but also the air compression heat of the supercharger can be effectively utilized, thereby improving the economy of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

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

[0037] Figure 2 A schematic block diagram of a vehicle air intake system provided by an embodiment of the present invention;

[0038] Figure 3 A schematic diagram of the structure of an intake manifold in a vehicle intake system provided by an embodiment of the present invention;

[0039] Figure 4 A schematic diagram of the structure of a throttle body in a vehicle air intake system provided by an embodiment of the present invention;

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

[0041] Figure 6 A schematic flow chart of a vehicle air intake method provided by an embodiment of the present invention;

[0042] Figure 7 Another schematic flow chart of a vehicle air intake method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

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

[0046] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0047] See below Figure 2 The embodiment of the present invention provides a vehicle intake system, comprising an engine control module 1, a supercharger 2, an intercooler 3, a throttle body 4 and an intake manifold 5, wherein the supercharger 2, the intercooler 3, the throttle body 4 and the intake manifold 5 are sequentially connected to form a first intake passage 10, and the system further comprises:

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

[0049] A temperature acquisition module 6 is connected to the engine control module 1 and is used to acquire temperature signals; wherein the temperature signals include intake air temperature signals and ambient temperature signals;

[0050] A control valve 7 connected to the engine control module 1 and disposed between the first air intake passage 10 and the second air intake passage 20, for controlling the opening and closing of the first air intake passage 10 and the second air intake passage 20;

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

[0052] In this embodiment, the vehicle air intake system is provided with two engine air intake passages, namely the first air intake passage 10 and the second air intake passage 20, wherein the first air intake passage 10 is the original air intake passage passing through the intercooler 3, and the second air intake passage 20 is a bypass passage provided at both ends of the intercooler 3, and the second air intake passage 20 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, so that when the second air intake passage 20 is used for air intake, the intercooler 3 can be avoided from further cooling the intake air, thereby making full use of the compression heat of the intake air by the supercharger 2 to increase the gas temperature in the intake manifold 5. At the same time, the present embodiment further provides a control valve 7 at the intersection of the first air intake passage 10 and the second air intake passage 20, and controls the control valve 7 in combination with the engine control module 1 (ECM) and the temperature acquisition module 6 to achieve orderly switching of the first air intake passage 10 and the second air intake passage 20. This not only ensures that the icing problem of the throttle body 4 is effectively solved, but also achieves effective utilization of the air compression heat of the supercharger 2, thereby improving the economy of the vehicle.

[0053] In some optional embodiments, the control valve 7 may be a three-way solenoid valve, through which the supercharger 2, the first air intake passage 10 and the second air intake passage 20 are respectively connected, so that the air intake of the supercharger 2 flows into the first air intake passage 10 or the second air intake passage 20 according to the selection of the three-way solenoid valve. In some other optional embodiments, the control valve 7 may also be a two-way solenoid valve, and two two-way solenoid valves are provided, so that one two-way solenoid valve is provided on the first air intake passage 10 for controlling the switch of the first air intake passage 10 alone, and the other two-way solenoid valve is provided on the second air intake passage 20 for controlling the switch of the second air intake passage 20 alone. When the first air intake passage 10 needs to be opened or closed, the engine control module 1 may send a corresponding instruction to the two-way solenoid valve provided on the first air intake passage 10; when the second air intake passage 20 needs to be opened or closed, the engine control module 1 may send a corresponding instruction to the two-way solenoid valve provided on the second air intake passage 20.

[0054] In addition, the temperature acquisition module 6 may specifically include a vehicle ambient temperature sensor and an intake air temperature pressure sensor (TMAP) arranged on the engine intake manifold 5, so that when the temperature acquisition module 6 collects the temperature signal, what is specifically collected is the vehicle ambient temperature signal and the intake air temperature signal (here, when it is not specifically stated that it is the vehicle ambient temperature signal or the intake air temperature signal, the temperature signal refers to a signal containing the vehicle ambient temperature signal and the intake air temperature signal, the same below). In actual application scenarios, after the vehicle is started, air is normally taken in through the first air intake passage 10. The engine control module 1 collects the vehicle ambient temperature signal and the intake air temperature signal through the vehicle ambient temperature sensor and the intake air temperature pressure sensor respectively, and then compares the vehicle ambient temperature signal and the intake air 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 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 threshold, air can continue to be taken in through the first air intake passage 10. 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 air intake passage 10 to the second air intake passage 20 to increase the gas temperature in the intake manifold 5. Furthermore, the temperature acquisition module 6 continues to collect temperature signals, such as the intake air temperature signal, and the engine control module 1 determines whether the intake air temperature signal reaches another preset temperature threshold (for example, 10°C). When it is determined that the intake air temperature signal reaches another preset temperature threshold, the second intake passage 20 can be closed by the control valve 7, and the first intake passage 10 can be reopened.

[0055] In one embodiment, if Figure 3 As shown, an auxiliary heating device 51 is provided in the intake manifold 5 .

[0056] Correspondingly, the engine control module 1 is connected to the auxiliary heating device 51 , and the engine control module 1 is also used to collect engine operating parameters and perform switch control on the auxiliary heating device 51 according to the engine operating parameters.

[0057] By installing an auxiliary heating device 51 in the intake manifold 5 and controlling the auxiliary heating device 51 in combination with the engine control module 1, the temperature in the intake manifold 5 can be effectively increased as a whole, and the probability of oil and gas with high water vapor entering the intake manifold 5 through the load pipeline of the crankcase ventilation system and freezing and staying there can be reduced, as well as the probability of high temperature radiation in the cylinder when the engine is stopped, causing the frost in the intake manifold 5 to melt due to heat and form a liquid water flow, thereby further reducing the possibility of the throttle body 4 turn pin and valve plate condensing into ice.

[0058] In some optional embodiments, the auxiliary heating device 51 may be a ceramic heating element (such as a PTC heating element) disposed in a closed cavity at the bottom of the intake manifold 5, or a metal heating element disposed in the intake cavity of the intake manifold 5. Figure 3 The intake manifold 5 includes an intake manifold cavity 52 and an intake manifold air inlet 53 opened in the intake manifold cavity 52. ​​A temperature-resistant heat-conductive shell 54 is provided outside the intake manifold cavity 52. ​​A closed cavity is provided below the intake manifold cavity 52. ​​An auxiliary heating device 51 with a water inlet 511 and a water outlet 512 is provided in the closed cavity.

[0059] In the actual application scenario, after the vehicle is started, the engine control module 1 (ECM) collects the engine operating parameters and vehicle mode, and after the engine is started, monitors the temperature collected by the engine water temperature sensor in real time to determine the coolant temperature value at the end of the engine operation. That is, when the engine is stopped, if the engine coolant temperature is higher than the calibration threshold (here referred to as the first preset coolant temperature threshold, such as 40°C), no other measures are required. On the contrary, if the engine coolant temperature is lower than the calibration threshold (for example, ≤40°C), a Qutong water risk count is triggered. Correspondingly, if the engine coolant temperature is lower than the calibration threshold for multiple times, multiple Qutong water risk counts are triggered. Further, if the Qutong water risk count reaches a certain number of thresholds, the Qutong water risk determination is triggered. At this time, the engine control module 1 (ECM) controls the auxiliary heating device 51 of the intake manifold 5, that is, the auxiliary heating device 51 is started to increase the temperature of the intake manifold 5. If the risk count of water in the Triton does not reach the number threshold, during this period, when the engine is shut down, if the engine coolant temperature is higher than another calibrated threshold (here referred to as the second preset coolant temperature threshold, for example ≥70°C) and lasts for a certain period of time (for example 600s), the risk count of water in the Triton will be reset to zero and restarted the next time the engine coolant temperature is lower than the calibrated threshold.

[0060] Here, the threshold of the water risk count of the Qutong system needs to be verified by a special test. This special test verification can be selected in a low temperature environment in winter, and the user's single short-distance driving condition (such as 1 to 1.5 km), such as from home to the supermarket or work and other short-distance life scenarios. After each operating cycle, the water content is determined by testing the oil volume, and the change of the oil water content as the cycle increases is recorded, so as to evaluate and determine the threshold of the water risk count of the vehicle model (for example, the risk count can be reversed to 20 times based on a water content of 6%).

[0061] In some preferred embodiments, the engine intake can be controlled in combination with the second intake passage 20 and the auxiliary heating device 51, or the second intake passage 20 or the auxiliary heating device 51 can be used alone to control the engine intake. In this way, the effect of reducing the high-water vapor oil and gas entering the intake manifold 5 through the partial load pipeline of the crankcase ventilation system and freezing can be achieved in steps and scenarios, avoiding the high-temperature radiation in the cylinder when the engine is stopped, causing the frost in the intake manifold 5 to melt due to heat to form liquid water flow, thereby reducing the risk of ice condensing on the throttle body 4 turn pin and valve plate. For example, when the engine intake is controlled in combination with the second intake channel 20 and the auxiliary heating device 51, after the vehicle is started, the engine control module 1 collects the temperature signal on the one hand, and compares the temperature signal with the preset temperature threshold to determine whether to switch the first intake channel 10 to the second intake channel 20, that is, when the temperature signal does not reach the preset temperature threshold, the first intake channel 10 is switched to the second intake channel 20 to increase the gas temperature in the intake manifold 5; on the other hand, the engine operating parameters and the vehicle mode are collected, and the engine coolant temperature is obtained therefrom, and then the coolant temperature is compared with the calibration threshold. If the coolant temperature is lower than the calibration threshold, a Qutong water risk count is triggered. After the count is triggered, it is determined whether the current number reaches the number threshold. If so, the auxiliary heating device is started to increase the gas temperature in the intake manifold 5.

[0062] In one embodiment, if Figure 4 As shown, a heating element 41 is provided on the throttle body 4 .

[0063] Correspondingly, the engine control module 1 is connected to the heating element 41 , and the engine control module 1 is also used to control the switching of the heating element 41 according to the temperature signal collected by the temperature collection module 6 .

[0064] In this embodiment, a heating element 41 is provided on the throttle body 4, so that the intake air flowing through the throttle body 4 can be heated to prevent the supercooled air from condensing into frost. Specifically, a heating rod can be added to the rotating shaft 42 of the valve 43 of the throttle body 4. Figure 5 The engine control module 1 obtains the temperature signal through the temperature acquisition module 6, and then determines whether it is necessary to turn on the heating element 41 for heating according to the temperature signal. For example, when the corresponding temperature threshold is reached, the heating element 41 is turned on, and if the corresponding temperature threshold is not reached, there is no need to turn on the heating element 41.

[0065] Furthermore, the heating element 41 is combined with the second air intake passage 20 to control the air intake. For example, when the temperature signal reaches the first preset temperature threshold, neither the second air intake passage 20 nor the heating element 41 is turned on; 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 intake passage 20 is turned on, but the heating element 41 is not turned on; when the temperature signal does not reach the second preset temperature threshold, the second air intake passage 20 and the heating element 41 are turned on at the same time. It can be understood that the temperature signal described in this embodiment includes the vehicle ambient temperature signal and the intake air temperature signal. When the temperature signal is compared with the first preset temperature threshold and the second preset temperature threshold, the vehicle ambient temperature signal and the intake air temperature signal are compared with the first preset temperature threshold and the second preset temperature threshold. For example, when both the vehicle ambient temperature signal and the intake air temperature signal reach the first preset temperature threshold, it is determined that the temperature signal reaches the first preset temperature threshold. For another example, when the vehicle ambient temperature signal reaches the first preset temperature threshold, and the intake air 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 has reached the first preset temperature threshold, and at this time, neither the second intake passage 20 nor the heating element 41 is turned on. Of course, in other embodiments, the vehicle ambient temperature signal and the intake air temperature signal may also 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 vehicle ambient temperature signal is compared with the vehicle ambient sub-temperature threshold under the first preset temperature threshold, and the intake air temperature signal is compared with the intake air sub-temperature threshold under the first preset temperature threshold.

[0066] like Figure 6 As shown, an embodiment of the present invention further provides a vehicle intake control method, which is applied to the vehicle intake system as described in any one of the above items, and the method includes: steps S101 to S104.

[0067] Step S101, after the vehicle is started, the vehicle air intake is controlled through the first air intake passage 10;

[0068] Step S102, collecting temperature signals through the temperature collection module 6;

[0069] Step S103, comparing the temperature signal with a first preset temperature threshold;

[0070] Step S104 : when the temperature signal does not reach the first preset temperature threshold, the control valve 7 is used to switch to the second air intake passage 20 , and the second air intake passage 20 controls the vehicle air intake.

[0071] In this embodiment, after the vehicle is started, the first air intake channel 10 normally intakes air, and the temperature signal is collected by the temperature acquisition module 6. The temperature signal is then compared with a preset temperature threshold. If the temperature signal reaches the preset temperature threshold, the first air intake channel 10 continues to intake air. If the temperature signal does not reach the preset temperature threshold, the first air intake channel 10 is closed by the control valve 7, and the second air intake channel 20 is opened, so that the vehicle intake is controlled by the second air intake channel 20.

[0072] In addition to the first air intake passage 10 composed of the supercharger 2, the intercooler 3, the throttle body 4 and the intake manifold 5, the embodiment also provides a second air intake passage 20, which is directly connected between the supercharger 2 and the throttle body 4, so that the intercooler 3 can be bypassed and short-circuited. When the second air intake passage 20 is used for intake, the intercooler 3 can be prevented from further cooling the intake air, thereby making full use of the compression heat of the intake air by the supercharger 2 to increase the gas temperature in the intake manifold 5. At the same time, the embodiment also provides a control valve 7 at the intersection of the first air intake passage 10 and the second air intake passage 20, and controls the control valve 7 in combination with the engine control module 1 and the temperature acquisition module 6 to achieve orderly switching between the first air intake passage 10 and the second air intake passage 20, so that not only the icing problem of the throttle body 4 can be effectively solved, but also the air compression heat of the supercharger 2 can be effectively utilized, thereby improving the economy of the vehicle. It is understandable that the implementation subject of the vehicle intake control method provided in this embodiment is the engine control module 1. Of course, in some other embodiments, other control units may also be considered as the implementation subject of the vehicle intake control method.

[0073] In a specific embodiment, the temperature acquisition module 6 includes a vehicle ambient temperature sensor and an intake air temperature 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 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 passage 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 passage 10 to the second intake passage 20 to increase the gas temperature in the intake manifold 5. Furthermore, the temperature signal continues 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] Combination 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 number threshold, the auxiliary heating device 51 is controlled to heat the intake manifold 5 .

[0079] Furthermore, the vehicle intake control method also 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 count of water content in Qutong is reset to zero.

[0082] This embodiment controls the auxiliary heating device 51 according to the engine operating parameters, which can effectively increase the temperature in the intake manifold 5 as a whole, reduce the probability of high-water vapor oil and gas entering the intake manifold 5 through the load pipeline of the crankcase ventilation system and freezing, and reduce the probability of high-temperature radiation in the cylinder when the engine is stopped, and the frost in the intake manifold 5 melting due to heat to form liquid water flow, thereby further reducing the possibility of condensation of the throttle body 4 turn pin and valve plate into ice.

[0083] Specifically, after the vehicle is started, the engine control module 1 (ECM) can collect engine operating parameters and vehicle modes, and after the engine is started, the temperature collected by the engine water temperature sensor is monitored in real time to determine the coolant temperature value at the end of the engine operation. That is, when the engine is stopped, if the engine coolant temperature is higher than the calibration threshold (herein referred to as the first preset coolant temperature threshold, such as 40°C), no other measures are required. On the contrary, if the engine coolant temperature is lower than the calibration threshold (for example, ≤40°C), a Qutong water risk count is triggered. Correspondingly, if the engine coolant temperature is lower than the calibration threshold for multiple times, multiple Qutong water risk counts are triggered. Further, if the Qutong water risk count reaches a certain number of thresholds, the Qutong water risk determination is triggered. At this time, the engine control module 1 (ECM) controls the auxiliary heating device 51 of the intake manifold 5, that is, the auxiliary heating device 51 is started to increase the temperature of the intake manifold 5. If the risk count of water in the Triton does not reach the number threshold, during this period, when the engine is shut down, if the engine coolant temperature is higher than another calibrated threshold (here referred to as the second preset coolant temperature threshold, for example ≥70°C) and lasts for a certain period of time (for example 600s), the risk count of water in the Triton will be reset to zero and restarted the next time the engine coolant temperature is lower than the calibrated threshold.

[0084] Here, the threshold of the water risk count of the Qutong system needs to be verified by a special test. This special test verification can be selected in a low temperature environment in winter, and the user's single short-distance driving condition (such as 1 to 1.5 km), such as from home to the supermarket or work and other short-distance life scenarios. After each operating cycle, the water content is determined by testing the oil volume, and the change of the oil water content as the cycle increases is recorded, so as to evaluate and determine the threshold of the water risk count of the vehicle model (for example, the risk count can be reversed to 20 times based on a water content of 6%).

[0085] In some preferred embodiments, the engine intake can be controlled in combination with the second intake passage 20 and the auxiliary heating device 51, or the second intake passage 20 or the auxiliary heating device 51 can be used alone to control the engine intake. In this way, the effect of reducing the high-water vapor oil and gas entering the intake manifold 5 through the partial load pipeline of the crankcase ventilation system and freezing can be achieved in steps and scenarios, avoiding the high-temperature radiation in the cylinder when the engine is stopped, causing the frost in the intake manifold 5 to melt due to heat to form liquid water flow, thereby reducing the risk of ice condensing on the throttle body 4 turn pin and valve plate.

[0086] In one embodiment, the vehicle intake control method further includes:

[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, the control valve 7 is switched to the second air intake passage 20, and the second air intake passage 20 controls the vehicle air intake, and controls the heating element 41 to start heating.

[0089] This embodiment determines whether the heating element 41 needs to be turned on for heating based on the temperature signal. For example, when the corresponding temperature threshold is reached, the heating element 41 is turned on, and if the corresponding temperature threshold is not reached, the heating element 41 does not need to be turned on.

[0090] Furthermore, the heating element 41 is combined with the second air intake channel 20 to control the air intake. For example, when the temperature signal reaches the first preset temperature threshold, neither the second air intake channel 20 nor the heating element 41 is turned on; when the temperature signal does not reach the first preset temperature threshold but reaches the second preset temperature threshold (that is, the second preset temperature threshold is lower than the first preset temperature threshold), the second air intake channel 20 is turned on, but the heating element 41 is not turned on; when the temperature signal does not reach the second preset temperature threshold, the second air intake channel 20 and the heating element 41 are turned on at the same time.

[0091] An embodiment of the present invention further provides a vehicle, comprising the vehicle air intake system as described in any one of the above items.

[0092] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of this application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of this application.

[0093] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

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 of the second air intake passage 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 air intake passage and the second air intake passage, and used for controlling the opening and closing of the first air intake passage and the second air intake passage; The engine control module is used to control the switching of the first air intake passage and the second air intake passage through the control valve according to the temperature signal collected by the temperature collection module.

2. The vehicle air intake system according to claim 1, characterized in that: An auxiliary heating device is arranged 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 also 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 arranged 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 also 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 a 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, applied to the vehicle intake system according to claim 3, characterized in that: Also includes: Collecting engine operating parameters; wherein the engine operating parameters include coolant temperature when the engine is stopped; comparing the coolant temperature with a first preset coolant temperature threshold; When the coolant temperature does not reach the first preset coolant temperature threshold, a preset tritium water risk count is triggered; When the risk count of water in the Qutong reaches a preset number threshold, the auxiliary heating device is controlled to heat the intake manifold.

8. The vehicle intake control method according to claim 7, characterized in that: Also includes: When the coolant temperature reaches a second preset coolant temperature threshold, obtaining a duration for 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.

9. 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.

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

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