Air inlet throttle valve and control method of air inlet throttle valve

Abstract

The invention discloses an air inlet throttling valve and a control method of the air inlet throttling valve, the air inlet throttling valve comprises a valve body and a valve plate, and further comprises an emptying piece, and the emptying piece is installed on the valve body and located on the upstream of the valve plate. According to the scheme, when the engine is in the heating mode, the opening degree of the valve plate is adjusted to the preset opening degree, the preset opening degree is the minimum opening degree enabling the air inlet pressure of the air inlet throttling valve to be stable, and the problem that when the engine is in the heating mode, the opening degree of the valve plate is located in a sensitive area, the valve plate violently shakes, and the air inlet amount violently fluctuates is solved; meanwhile, the emptying piece exhausts redundant inlet air, it is guaranteed that the air inlet amount actually entering the engine is the required air inlet amount, the air inlet requirement of the engine in a heating mode is met, and the emission and combustion stability of the engine in the early stage of cold start is improved.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to an intake throttle valve and a control method for the intake throttle valve. Background Art

[0002] The intake throttle valve is a critical component in an automobile's fuel supply system. Installed in the intake line of the internal combustion engine, it controls the amount of air entering the engine. When the engine load increases, the ECU controls the intake throttle valve's opening to increase to meet the demand for more air. When the engine load decreases or during the warm-up phase, the ECU controls the intake throttle valve's opening to decrease to reduce air demand.

[0003] like Figures 1-4 As shown, it is a structural diagram of the intake throttle valve in the related technology. The intake throttle valve includes a motor 01, a valve shaft 02 and a valve plate 03. The motor 01 controls the rotation of the valve shaft 02, and the valve shaft 02 drives the valve plate 03 to rotate to adjust the opening of the intake throttle valve.

[0004] Figure 5 is the opening characteristic curve of the intake throttle valve. According to the curve, when the opening of the intake throttle valve is between 0-20%, the relationship between the opening of the intake throttle valve and the intake volume is sensitive. Within the opening range of 0-20%, a change in the opening of the intake throttle valve will cause a sharp change in the air volume and unstable intake performance.

[0005] When the engine is operating in cold climates, the intake throttle valve opening needs to be reduced. Setting the intake throttle valve opening to a range of 0-20% puts the engine in heating mode to quickly raise its temperature and accelerate cold start efficiency. This opening range is sensitive to the intake throttle valve. Changes in throttle valve opening can lead to significant fluctuations in intake air volume. The difference between actual and required intake air volume can vary significantly, causing the ECU to frequently control the rotation of valve plate shaft 02, causing valve plate 03 to vibrate violently. This leads to significant fluctuations in intake air volume and increases the risk of engine cold start failure. Summary of the Invention

[0006] The present application proposes an intake throttle valve to reduce the risk of engine cold start failure. The present application also proposes a control method for the intake throttle valve.

[0007] In order to achieve the above-mentioned object, the present application provides an intake throttle valve, comprising a valve body;

[0008] The valve body includes a valve plate and a venting member, wherein the venting member is arranged on the valve body and located upstream of the valve plate, and is used to discharge excess intake air entering the valve body;

[0009] The excess intake air is the portion of the actual intake air of the engine that exceeds the required intake air when the engine is in heating mode and the valve plate is opened to a preset opening;

[0010] The preset opening is the minimum opening of the intake throttle valve at which the intake pressure is stable.

[0011] Preferably, in the above-mentioned air intake throttle valve, the venting member includes a venting hole, a venting valve plate and a venting drive member;

[0012] The vent hole is provided through the valve wall of the valve body, and is used to connect the valve cavity of the valve body with the outside world;

[0013] The vent valve plate is rotatably connected to the valve body, and the vent drive member is connected to the vent valve plate;

[0014] The vent driving member is used to drive the vent valve plate to rotate, so that the vent valve plate blocks the vent hole or does not block the vent hole.

[0015] Preferably, in the above-mentioned air intake throttle valve, the venting member further comprises a leak-proof valve plate and a leak-proof driving member;

[0016] The anti-leakage valve disc is rotatably connected to the valve body, and the anti-leakage valve disc is connected to the anti-leakage driving member, and the anti-leakage driving member is used to drive the anti-leakage valve disc to rotate to block or not block the vent hole;

[0017] The vent hole is opened at the lowest end of the valve body, and the anti-leakage valve plate is close to the valve cavity of the valve body relative to the vent valve plate.

[0018] Preferably, in the above-mentioned intake throttle valve, the vent valve plate and the anti-leakage valve plate are rectangular valve plates, and the vent hole is a prismatic hole adapted to the shape of the rectangular valve plate;

[0019] Along the direction perpendicular to the axis of the valve body, the width of the vent hole is L, 1.2D≤L≤2D, where D is the diameter of the valve plate axis.

[0020] Preferably, in the above-mentioned air intake throttle valve, the anti-leakage valve plate is located at one end where the vent hole communicates with the valve cavity of the valve body;

[0021] One end of the leak-proof valve disc close to the valve disc is rotatably connected to the valve body;

[0022] The cavity wall of the valve body includes a receiving groove communicated with the vent hole, so that the anti-leakage valve disc can rotate toward the valve disc until it abuts against the cavity wall of the valve body.

[0023] Preferably, in the above-mentioned intake throttle valve, the vent valve plate is located at the end of the vent hole that is away from the valve cavity of the valve body;

[0024] A limiting boss is provided on the hole wall of the vent hole, and the limiting boss is used to abut against the vent valve disc when the vent valve disc rotates to the upper limit position.

[0025] Preferably, in the above-mentioned intake throttle valve, the vent hole is arranged obliquely along the movement direction of the intake air in the valve body.

[0026] Preferably, in the above-mentioned intake throttle valve, the angle between the valve plate axis of the valve plate and the horizontal plane is 0°-180°.

[0027] A method for controlling an air intake throttle valve, comprising:

[0028] The engine is in heating mode, and the valve plate of the intake throttle valve is adjusted to open to a preset opening;

[0029] Opening the venting member to discharge excess intake air entering the intake throttle valve;

[0030] The excess intake air is the portion of the actual intake air of the engine that exceeds the required intake air when the engine is in heating mode and the valve is opened to a preset opening;

[0031] The preset opening is the minimum opening of the intake throttle valve at which the intake pressure is stable.

[0032] Preferably, in the above-mentioned control method of the air intake throttle valve, opening the vent member is specifically:

[0033] Open the anti-leakage valve;

[0034] The vent valve is opened to a required opening, where the required opening is an opening capable of discharging the excess intake air.

[0035] Preferably, in the above-mentioned control method of the intake throttle valve, when the engine is in a non-heating mode, the anti-leakage valve plate is opened and the vent valve plate is closed to allow foreign matter in the intake air to enter the vent hole.

[0036] Preferably, in the above-mentioned control method of the intake throttle valve, the engine is in a non-heating mode, the anti-leakage valve plate is opened, and the vent valve plate is closed to allow foreign matter in the intake air to enter the vent hole, and it also includes judging whether the amount of foreign matter accumulated on the vent valve plate exceeds a preset amount. When the amount of foreign matter accumulated on the vent valve plate exceeds the preset amount, the anti-leakage valve plate is closed and the vent valve plate is opened to discharge the foreign matter from the vent hole.

[0037] Preferably, in the above-mentioned control method of the air intake throttle valve, whether the amount of foreign matter accumulated on the vent valve plate exceeds a preset amount is determined by:

[0038] Based on a mapping table of engine speed, actual intake air flow and motor preset torque base value, a motor preset torque base value corresponding to the engine speed and actual intake air flow is obtained;

[0039] According to the actual intake pressure and the motor preset torque correction coefficient table, the motor preset torque base value is corrected to obtain the motor preset torque;

[0040] Get the actual torque of the motor;

[0041] Obtaining a torque difference between the actual torque of the motor and the preset torque of the motor;

[0042] The torque difference is compared with a torque difference threshold, and if the torque difference is greater than the torque difference threshold, it is determined that the amount of foreign matter accumulated on the vent valve plate exceeds a preset amount.

[0043] Preferably, in the above-mentioned control method for an intake throttle valve, after comparing the torque difference with a torque difference threshold, and if the torque difference is greater than the torque difference threshold, determining that the amount of foreign matter accumulated on the vent valve plate exceeds a preset amount, the method further includes:

[0044] When the torque difference is less than or equal to the torque difference threshold, it is determined that the amount of foreign matter accumulated on the vent valve plate does not exceed a preset amount, and the anti-leakage valve plate and the vent valve plate do not operate.

[0045] The intake throttle valve provided in the embodiment of the present application includes a valve body and a valve plate, and also includes a vent member, which is installed on the valve body and located upstream of the valve plate. When the engine is in heating mode, this solution adjusts the opening of the valve plate to more than 20%, so that the opening of the valve plate is maintained in an area that avoids severe vibration of the valve plate, or in other words, the minimum opening of the intake throttle valve shown in the bench calibration to ensure stable intake pressure. This solves the problem of severe vibration of the valve plate when the valve plate opening is in the sensitive area when the engine is in heating mode, resulting in severe fluctuations in intake volume. At the same time, the vent member discharges excess intake air, ensuring that the actual intake volume entering the engine is the required intake volume, meeting the intake demand of the engine heating mode, and improving the emission and combustion stability of the engine in the initial stage of cold start.

[0046] This application also discloses a control method for an intake throttle valve, which is applicable to the intake throttle valve described in any of the above solutions. Since the intake throttle valve has the above technical effects, the control method applicable to the intake throttle valve also has the same technical effects, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or prior art descriptions. Obviously, the drawings described below are only some examples or embodiments of the present application. For those of ordinary skill in the art, without paying any creative work, other drawings can be obtained based on the provided drawings, and the present application can also be applied to other similar scenarios based on the provided drawings. Unless it is obvious from the language context or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0048] Figure 1 It is a structural diagram of the air intake system provided by the prior art;

[0049] Figure 2 It is a structural diagram of an intake throttle valve provided by the prior art;

[0050] Figure 3 This is a front view of an air intake throttle valve provided by the prior art;

[0051] Figure 4 It is a top view of an air intake throttle valve provided by the prior art;

[0052] Figure 5 It is the opening characteristic curve of the intake throttle valve provided by the prior art;

[0053] Figure 6 Schematic diagram of the structure of the air intake throttle valve provided in an embodiment of the present application;

[0054] Figure 7 yes Figure 6 Cross-sectional view along AA;

[0055] Figure 8 yes Figure 7 Cross-sectional view along BB;

[0056] Figure 9 yes Figure 7 A partial enlarged view of Figure I;

[0057] Figure 10 This is a structural diagram of a vent provided in an embodiment of the present application for discharging excess intake air.

[0058] in:

[0059] 01-motor; 02-valve shaft; 03-valve; 04-pipeline before throttle valve; 05-engine intake pipe;

[0060] 1-valve body; 11-accommodating groove; 2-valve disc; 3-venting member; 31-venting hole; 32-venting valve disc; 33-venting drive member; 34-leakage-proof valve disc; 35-leakage-proof drive member; 36-limiting boss; 4-valve disc shaft. DETAILED DESCRIPTION

[0061] The present application will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are merely for explaining the related application and are not intended to limit the application. The described embodiments are merely a portion of the embodiments of the present application and are not intended to be exhaustive. All other embodiments derived by persons of ordinary skill in the art based on the embodiments in the present application without creative effort are intended to fall within the scope of protection of the present application.

[0062] It should be noted that, for ease of description, only the parts related to the relevant applications are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0063] It should be understood that the terms "system," "device," "unit," and / or "module" used in this application are a method for distinguishing different components, elements, parts, portions, or assemblies at different levels. However, if other terms can achieve the same purpose, the terms may be replaced by other expressions.

[0064] As used in this application and the claims, unless the context clearly indicates an exception, the terms "a," "an," "an," and / or "the" are not intended to refer to the singular and may include the plural, unless the context clearly indicates otherwise. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements. The phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, product, or apparatus that includes the elements.

[0065] In the description of the embodiments of this application, unless otherwise specified, " / " represents or. For example, A / B can represent A or B. "And / or" in this article is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of this application, "plurality" means two or more than two.

[0066] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0067] like Figure 3As shown, the motor 01 of the intake throttle valve receives the control signal of the engine ECU and controls the rotation of the intake throttle valve to change the flow area of the intake throttle valve, thereby achieving the purpose of changing the intake flow rate and intake pressure.

[0068] The inlet of the intake throttle valve has a throttle valve front pipe 04. Air flows in from the throttle valve front pipe 04, passes through the valve plate 03 of the intake throttle valve, and then flows into the engine intake pipe 05.

[0069] The motor 01 of the intake throttle valve needs to drive the valve shaft 02 of the intake throttle valve to rotate. In order to realize the rotation of the valve shaft 02, there needs to be a gap between the valve shaft 02 of the intake throttle valve and the mounting hole of the valve seat of the intake throttle valve.

[0070] The intake air contains moisture. In order to reduce the moisture in the throttle valve front pipe 04 from entering the gap between the valve plate shaft 02 and the mounting hole, the relevant technology requires that the installation angle of the valve plate shaft 02 should not exceed 20° with the horizontal direction.

[0071] When the engine is operating in cold climates, moisture entering the gap between valve shaft 02 and the mounting hole poses a risk of freezing. Furthermore, foreign matter such as dust in the intake air can also enter the gap between valve shaft 02 and the mounting hole, increasing the risk of valve shaft 02 becoming stuck. Both of these issues can lead to uncontrollable air intake through the intake throttle valve.

[0072] The valve shaft 02 is arranged horizontally, and the motor 01 of the intake throttle valve is located at one end of the axial direction of the valve shaft 02. Due to the large size of the motor 01, the engine layout needs to consider the avoidance of the motor 01, which increases the difficulty of engine layout.

[0073] In a first aspect, the present application discloses an intake throttle valve comprising a valve body 1, a motor, a valve disc 2, and a valve disc shaft 4. The valve disc 2 and valve disc shaft 4 are mounted within a valve cavity of the valve body 1, and the motor is mounted outside the valve cavity of the valve body 1. The motor drives the valve disc shaft 4 to rotate, and the valve disc shaft 4 drives the valve disc 2 to rotate.

[0074] The air intake throttle valve disclosed in the present application further includes a vent member 3 , which is mounted on the valve body 1 and located upstream of the valve plate 2 .

[0075] Vent 3 is used to discharge excess intake air from valve body 1. Excess intake air refers to the excess of actual engine intake air over required intake air (required intake air is the intake volume of the intake throttle valve at the required opening under corresponding operating conditions in the relevant art, and the required opening of the intake throttle valve is the opening of the intake throttle valve under corresponding operating conditions in the relevant art) when the engine is in heating mode and valve plate 2 is open to the preset opening. The preset opening is the minimum opening of the intake throttle valve at which the intake pressure remains stable.

[0076] The preset opening can be obtained based on the intake throttle valve opening characteristic curve or through bench calibration. Figure 5 As shown, when the preset opening is 0-20%, the direction of the intake throttle valve opening characteristic curve is relatively steep. If the opening of the valve plate 2 changes a little within this opening range, the intake air volume will change relatively greatly. After the preset opening exceeds 20%, the direction of the intake throttle valve opening characteristic curve begins to slow down. If the opening of the valve plate 2 changes a little within this opening range, the intake air volume will change relatively little. In this embodiment, the preset opening is 20%.

[0077] The preset opening is not limited to 20%. The preset opening is selected according to the working conditions of the engine and is not specifically limited here.

[0078] In the related art, when the engine is in heating mode, the opening of the valve plate 2 is less than 20%; in this solution, when the engine is in heating mode, the opening of the valve plate 2 is adjusted to more than 20%, so that the opening of the valve plate is maintained in an area where the valve plate 2 does not vibrate violently, or in other words, the minimum opening at which the intake pressure of the intake throttle valve is stable as shown in the bench calibration, thereby solving the problem that when the engine is in heating mode, the opening of the valve plate 2 is in a sensitive area and the valve plate vibrates violently, resulting in violent fluctuations in the intake volume; at the same time, the vent 3 discharges excess intake air to ensure that the actual intake volume entering the engine is the required intake volume, thereby improving the emission and combustion stability of the engine in the initial stage of cold start.

[0079] In some embodiments, the vent member 3 includes a vent hole 31 , a vent valve plate 32 and a vent driving member 33 .

[0080] The vent hole 31 is set through the valve wall of the valve body 1, and the vent hole 31 is used to connect the valve cavity of the valve body 1 with the outside world; the vent valve plate 32 is rotatably connected to the valve body 1, and the vent drive member 33 is connected to the vent valve plate 32.

[0081] The vent driver 33 is used to drive the vent valve disc 32 to rotate so that the vent valve disc 32 blocks the vent hole 31 or does not block the vent hole 31. Specifically, the vent driver 33 drives the vent valve disc 32 to rotate so that the vent valve disc 32 blocks the vent hole 31, and the intake air entering the valve body 1 cannot be discharged through the vent hole 31; the vent driver 33 drives the vent valve disc 32 to rotate so that the vent valve disc 32 does not block the vent hole 31, and the intake air entering the valve body 1 can be discharged through the vent hole 31.

[0082] When the engine is in heating mode, the opening of the valve plate 2 is adjusted to a preset opening, and the venting drive 33 drives the venting valve plate 32 to rotate so that the venting valve plate 32 does not block the venting hole 31, and the excess intake air entering the valve body 1 is discharged through the venting hole 31. Figure 10As shown; the engine is in non-heating mode, the opening of the valve plate 2 is adjusted to the required opening, and there is no excess air intake into the valve body 1. The vent drive 33 drives the vent valve plate 32 to rotate, so that the vent valve plate 32 blocks the vent hole 31, and the intake air entering the valve body 1 cannot be discharged through the vent hole 31.

[0083] In this embodiment, the vent valve plate 32 can be installed at any position in the vent hole 31 as long as it can ensure that the vent hole 31 is blocked.

[0084] Optionally, the vent valve disc 32 is mounted at one end of the axial direction of the vent hole 31. In this embodiment, one end of the vent valve disc 32 is rotatably connected to the cavity wall of the valve body 1 via a rotating shaft. The driving member may be a motor, which drives the rotating shaft to rotate, thereby driving the vent valve disc 32 to rotate. In this embodiment, the middle portion of the vent valve disc 32 is rotatably connected to the hole wall of the vent hole 31 of the valve body 1 via a rotating shaft. The rotation axis of the vent valve disc 32 is parallel to the plane in which the vent valve disc 32 is located. The driving member may be a motor, which drives the rotating shaft to rotate, thereby driving the vent valve disc 32 to rotate within the vent hole 31.

[0085] Optionally, the vent valve is installed in the vent hole 31. In this embodiment, the middle portion of the vent valve disc 32 is rotatably connected to the hole wall of the vent hole 31 of the valve body 1 via a rotating shaft. The rotation axis of the vent valve disc 32 is parallel to the plane where the vent valve disc 32 is located. The driving member can optionally be a motor, which drives the rotating shaft to rotate, and the rotating shaft then drives the vent valve disc 32 to rotate in the vent hole 31.

[0086] The driving member is mounted on the valve body 1 and is located outside the valve cavity.

[0087] In some embodiments, the venting member 3 includes a venting hole 31 , a venting valve plate 32 and a venting drive member 33 , and also includes an anti-leakage valve plate 34 and an anti-leakage drive member 35 .

[0088] The anti-leakage valve disc 34 is rotatably connected to the valve body 1 , and the anti-leakage driving member 35 is connected to the anti-leakage valve disc 34 . The anti-leakage driving member 35 is used to rotate the anti-leakage valve disc 34 so that the anti-leakage valve disc 34 blocks the vent hole 31 or does not block the vent hole 31 .

[0089] In this embodiment, at least one of the anti-leakage valve disc 34 and the vent valve disc 32 blocks the vent hole 31, and the vent hole 31 cannot achieve communication between the valve cavity and the outside world; neither the anti-leakage valve disc 34 nor the vent valve disc 32 blocks the vent hole 31, and the vent hole 31 achieves communication between the valve cavity and the outside world.

[0090] Specifically, when the engine is in heating mode, the opening of the valve plate 2 is adjusted to a preset opening, the vent drive 33 drives the vent valve plate 32 to rotate, and the anti-leakage drive 35 drives the anti-leakage valve plate 34 to rotate, so that the vent valve plate 32 and the anti-leakage valve plate 34 do not block the vent hole 31, and the valve cavity is connected to the outside world through the vent hole 31, and the excess intake air entering the valve body 1 is discharged through the vent hole 31.

[0091] Optionally, the anti-leakage valve disc 34 is fully opened, and the vent valve disc 32 is opened to a required opening.

[0092] If the user does not perform timely air filter maintenance, foreign matter such as dust may be present in the engine pipeline, and the dust and other foreign matter may be easily trapped in the gap between the valve shaft 4 and the mounting hole.

[0093] In this solution, the vent hole 31 is opened at the lowest end of the valve body 1. Figure 7 As shown, the anti-leakage valve disc 34 is closer to the valve cavity of the valve body 1 relative to the vent valve disc 32. When the engine is in non-heating mode, the opening of the valve disc 2 is adjusted to the required opening, and there is no excess intake air entering the valve body 1. The vent drive 33 drives the vent valve disc 32 to rotate, so that the vent valve disc 32 blocks the vent hole 31. At the same time, the anti-leakage drive 35 drives the anti-leakage valve disc 34 to rotate, so that the anti-leakage valve disc 34 does not block the vent hole 31. Dust and other foreign matter in the intake air will fall under the action of gravity, enter the vent hole 31 through the end of the vent hole 31 that is not blocked by the anti-leakage valve disc 34, and fall on the vent valve disc 32. Figure 9 The space formed by the vent valve plate 32 and the vent hole 31 is a foreign matter collection chamber.

[0094] When it is necessary to discharge foreign matter from the foreign matter collecting chamber, the anti-leakage driving member 35 drives the anti-leakage valve plate 34 to rotate, and the anti-leakage valve plate 34 blocks the vent hole 31 to prevent air leakage. At the same time, the vent driving member 33 drives the vent valve plate 32 to rotate downward to discharge foreign matter.

[0095] The switching between the collection state and the discharge state of the foreign matter collection chamber can optionally be determined based on the torque threshold of the emptying motor. When the torque of the emptying motor is greater than the torque calibration threshold, it means that the weight of the foreign matter on the emptying valve plate 32 exceeds the design range, and the foreign matter collection chamber is switched from the collection state to the discharge state.

[0096] Optionally, the switching between the collection state and the discharge state of the foreign matter collection chamber can also:

[0097] Based on a mapping table of engine speed, actual intake air flow and motor preset torque base value, a motor preset torque base value corresponding to the engine speed and actual intake air flow is obtained;

[0098] According to the actual intake pressure and the motor preset torque correction coefficient table, the motor preset torque base value is corrected to obtain the motor preset torque;

[0099] Get the actual torque of the motor;

[0100] Obtain the torque difference between the actual torque of the motor and the preset torque of the motor;

[0101] Compare the torque difference with the torque difference threshold. If the torque difference is greater than the torque difference threshold, it is determined that the amount of foreign matter accumulated on the vent valve plate 32 exceeds the preset amount, indicating that the weight of the foreign matter on the vent valve plate 32 exceeds the design range, and the foreign matter collection chamber is switched from the collection state to the discharge state.

[0102] like Figure 8 As shown, the vent valve disc 32 and the anti-leakage valve disc 34 are rectangular valve discs, and correspondingly, the vent hole 31 is a prismatic hole that matches the shape of the vent valve disc 32 and the anti-leakage valve disc 34 .

[0103] The vent valve plate 32 and the anti-leakage valve plate 34 are not limited to the above shapes, and can also be other shapes that can achieve the function of blocking or not blocking the vent hole 31, all of which are within the protection scope of this application.

[0104] Optionally, the vent valve plate 32 and the anti-leakage valve plate 34 are arranged at both ends of the vent hole 31 in the axial direction. The sizes of the vent valve plate 32 and the anti-leakage valve plate 34 can be slightly larger than the cross-sectional area of the vent hole 31 to ensure that the vent valve plate 32 and the anti-leakage valve plate 34 seal the vent hole 31.

[0105] like Figure 8 As shown, along the direction perpendicular to the axis of the valve body 1, the width of the vent hole 31 is L, the diameter of the valve plate shaft 4 is D, and 1.2D≤L≤2D.

[0106] When L is less than 1.2D, foreign matter such as moisture and dust cannot be effectively collected, and cannot be prevented from entering the gap between the valve plate shaft 4 and the mounting hole of the intake throttle valve;

[0107] When L>2D, when the engine is in the heating mode, too much gas is discharged through the vent hole 31, which may easily cause insufficient intake air volume and cause cold start failure.

[0108] Optionally, the vent valve disc 32 and the anti-leakage valve disc 34 are respectively located at both ends of the axial direction of the vent hole 31, thereby increasing the space of the foreign matter collection chamber and reducing the difficulty of installing the vent valve disc 32 and the anti-leakage valve disc 34 on the valve body 1.

[0109] In this embodiment, the vent valve disc 32 rotates downward when not blocking the vent hole 31 , and the anti-leakage valve disc 34 rotates upward when not blocking the vent hole 31 .

[0110] Optionally, the rotation axes of the vent valve disc 32 and the anti-leakage valve disc 34 are located on the same side or both sides of the axial direction of the vent hole 31 .

[0111] One end of the anti-leakage valve disc 34 close to the valve disc 2 is rotatably connected to the valve body 1;

[0112] The cavity wall of the valve body 1 includes an accommodating groove 11 communicated with the vent hole 31 , so that the anti-leakage valve disc 34 can rotate toward the valve disc 2 until it abuts against the cavity wall of the valve body 1 .

[0113] The receiving groove 11 provides space for the anti-leakage valve disc 34 to rotate, allowing the anti-leakage valve disc 34 to rotate a greater angle toward the valve disc 2. Optionally, the shape of the receiving groove 11 is adapted to the shape of the anti-leakage valve disc 34, and the anti-leakage valve disc 34 can be rotated to fit the groove bottom of the receiving groove 11. When the foreign matter collection chamber is in the collection state, the anti-leakage valve disc 34 can ensure that it does not block the air inlet end of the vent hole 31 and does not block the air intake, thereby reducing the impact on the air intake.

[0114] Optionally, the depth of the accommodating groove 11 is greater than or equal to the thickness of the anti-leakage valve plate 34. After the anti-leakage valve plate 34 rotates to the accommodating groove 11, the anti-leakage valve plate 34 will not protrude from the cavity wall of the valve body 1, reducing interference with the intake air flow.

[0115] like Figure 9 As shown, a limiting boss 36 is provided on the wall of the vent hole 31. The limiting boss 36 is used to abut against the vent valve disc 32 when the vent valve disc 32 rotates to the upper limit position. Optionally, the upper limit position is when the vent valve disc 32 rotates to the horizontal position, at which time the vent valve disc 32 can seal the vent hole 31.

[0116] The vent valve plate 32 cooperates with the limiting boss 36 through a sealing structure such as a sealing gasket to achieve a sealing function and prevent air leakage.

[0117] Optionally, the shape of the limiting boss 36 is adapted to the shape of the vent valve disc 32 . After the vent valve disc 32 and the limiting boss 36 are fitted together, the circumference of the vent valve disc 32 cooperates with the limiting boss 36 to perform sealing.

[0118] When the engine is in heating mode, it is necessary to discharge excess intake air through the vent hole 31. Optionally, the vent hole 31 is arranged obliquely along the movement direction of the intake air in the valve body 1 to reduce the movement resistance of the intake air when it is discharged through the vent hole 31. Figure 7 As shown, along the movement direction of the intake air in the valve body 1 , the lower end of the vent hole 31 is closer to the valve plate 2 relative to the upper end of the vent hole 31 .

[0119] Because the intake throttle valve disclosed in this application includes a vent member 3, which can collect and discharge foreign matter such as dust, the throttle valve plate 2 of the intake throttle valve does not become stuck. In this embodiment, the angle between the valve plate axis 4 and the horizontal plane is 0°-180°, allowing the angle of the valve plate axis 4 to be designed according to the engine layout, thereby improving the flexibility and rationality of the engine layout.

[0120] Secondly, this application also discloses a control method for an intake throttle valve, applicable to the intake throttle valve described in any of the above-mentioned solutions. Since the intake throttle valve has the above-mentioned technical effects, the control method applicable to the intake throttle valve also has the same technical effects, which will not be described in detail here.

[0121] The control method of the intake throttle valve includes:

[0122] The engine is in heating mode, and the valve plate 2 of the intake throttle valve is adjusted to open to a preset opening;

[0123] Open the venting member 3 to discharge the excess intake air entering the intake throttle valve;

[0124] The excess intake air refers to the portion of the engine's actual intake air that exceeds the required intake air when the engine is in heating mode.

[0125] The preset opening is the minimum opening of the intake throttle valve at which the intake pressure is stable.

[0126] The preset opening of the intake throttle valve is greater than the required opening when the engine is in heating mode, which solves the problem of unstable engine intake performance caused by the vibration of valve plate 2 when the engine is in heating mode; the excess intake air in the intake pipe before the throttle valve is discharged through the vent 3, and the remaining intake air after discharge enters the engine intake pipe through valve plate 2.

[0127] In the above-mentioned control method of the intake throttle valve, the venting member 3 is opened to discharge the excess intake air entering the intake throttle valve, specifically,

[0128] Open the anti-leakage valve 34;

[0129] Open the vent valve 32 to the required opening.

[0130] Since the preset opening of the valve plate 2 of the intake throttle valve is greater than the required opening when the engine is in heating mode, the actual intake air volume entering the intake throttle valve is greater than the required intake air volume. The required opening of the vent valve plate 32 is an opening that can discharge excess intake air to meet the needs of cold start.

[0131] In this embodiment, the anti-leakage valve plate 34 can be fully opened or partially opened, and the specific opening degree is designed by those skilled in the art according to actual needs.

[0132] The greater the difference between the preset opening of the intake throttle valve and the required opening (the required opening of the intake throttle valve is the opening of the intake throttle valve under the corresponding working conditions in the relevant technology), the greater the opening of the vent valve plate 32 is, so as to effectively discharge excess intake air.

[0133] Optionally, obtaining the required opening of the vent valve plate 32 includes:

[0134] According to the intake throttle valve opening query table, the required opening of the vent valve plate 32 is obtained, wherein the table is a comparison table of the intake throttle valve opening and the required opening of the vent valve plate. In the comparison table of the intake throttle valve opening and the required opening of the vent valve plate, the opening of the intake throttle valve is not located in the sensitive area of the valve plate opening.

[0135] When the engine is in the heating mode, the anti-leakage valve plate 34 is always in the open state, and the vent valve plate 32 is always in the closed state.

[0136] Optionally, when the engine is in a non-heating mode, the anti-leakage valve plate 34 is closed to prevent the gas entering the intake throttle valve from entering the vent hole 31; optionally, the vent valve plate 32 is also closed.

[0137] Optionally, when the engine is in non-heating mode, the anti-leakage valve plate 34 is opened, and the vent hole 31 is connected to the valve cavity of the intake throttle valve; and the vent valve plate 32 is closed to prevent the vent hole 31 from being connected to the outside world, thereby avoiding intake leakage and foreign matter in the intake air entering the vent hole 31, thereby collecting foreign matter and reducing foreign matter entering the engine intake pipe.

[0138] Foreign matter is collected in the vent hole 31, and the vent valve plate 32 can be opened after the engine has run for a preset time to discharge the foreign matter. It should be noted that the anti-leakage valve plate 34 needs to be closed at this time to prevent intake leakage.

[0139] Foreign matter is collected in the vent hole 31 . Optionally, when the amount of foreign matter accumulated on the vent valve plate 32 exceeds a preset amount, the foreign matter needs to be discharged.

[0140] Specifically, it is determined whether the amount of foreign matter accumulated on the vent valve plate 32 exceeds a preset amount. When the amount of foreign matter accumulated on the vent valve plate 32 exceeds the preset amount, the anti-leakage valve plate 34 is closed and the vent valve plate 32 is opened to discharge the foreign matter from the vent hole 31.

[0141] When the amount of foreign matter accumulated on the vent valve disc 32 does not exceed a preset amount, the anti-leakage valve disc 34 and the vent valve disc 32 do not operate.

[0142] It is determined whether the amount of foreign matter accumulated on the vent valve plate 32 exceeds a preset amount, specifically,

[0143] Obtaining a motor preset torque base value corresponding to the engine speed and the actual intake air flow based on a mapping table of the engine speed, the actual intake air flow, and the motor preset torque base value;

[0144] According to the actual intake pressure and the motor preset torque correction coefficient table, the motor preset torque base value is corrected to obtain the motor preset torque;

[0145] Get the actual torque of the motor;

[0146] Obtaining a torque difference between the actual torque of the motor and the preset torque of the motor;

[0147] The torque difference is compared with a torque difference threshold. If the torque difference is greater than the torque difference threshold, it is determined that the amount of foreign matter accumulated on the vent valve plate 32 exceeds a preset amount.

[0148] The mapping table (map) of engine speed, actual intake air flow and motor preset torque base value has the actual intake air flow on the horizontal axis and the engine speed on the vertical axis. The motor preset torque base value is a point in the coordinate system. The intersection of the actual intake air flow and the engine speed in the map in the coordinate system is the motor preset torque base value.

[0149] The control method of the intake throttle valve disclosed in the present application further includes:

[0150] When the torque difference is less than or equal to the torque difference threshold, it is determined that the amount of foreign matter accumulated on the vent valve disc 32 does not exceed the preset amount, and the anti-leakage valve disc 34 and the vent valve disc 32 do not operate.

[0151] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed, and is not intended to limit the present application. For those skilled in the art, various modifications and variations of the present application are possible. The scope of application involved in the present application is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the above-mentioned application concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An air intake throttle valve, characterized in that: comprising a valve body (1); The valve body (1) comprises a valve plate (2) and a venting member (3), wherein the venting member (3) is arranged on the valve body (1) and located upstream of the valve plate (2), and the venting member (3) is used to discharge excess intake air entering the valve body (1); The excess intake air is the portion of the engine's actual intake air exceeding the required intake air when the engine is in heating mode and the valve plate (2) is opened to a preset opening; The preset opening is the minimum opening of the intake throttle valve at which the intake pressure is stable.

2. The intake throttle valve according to claim 1, characterized in that The venting member (3) includes a venting hole (31), a venting valve plate (32) and a venting driving member (33); The vent hole (31) is provided through the valve wall of the valve body (1) and is used to connect the valve cavity of the valve body (1) with the outside world; The vent valve plate (32) is rotatably connected to the valve body (1), and the vent drive member (33) is connected to the vent valve plate (32); The vent drive member (33) is used to drive the vent valve plate (32) to rotate, so that the vent valve plate (32) blocks the vent hole (31) or does not block the vent hole (31).

3. The air intake throttle valve according to claim 2, characterized in that The venting member (3) further includes a leak-proof valve plate (34) and a leak-proof driving member (35); The anti-leakage valve disc (34) is rotatably connected to the valve body (1), and the anti-leakage valve disc (34) is connected to the anti-leakage driving member (35). The anti-leakage driving member (35) is used to drive the anti-leakage valve disc (34) to rotate so as to block or not block the vent hole (31). The vent hole (31) is opened at the lowest end of the valve body (1), and the anti-leakage valve plate (34) is close to the valve cavity of the valve body (1) relative to the vent valve plate (32).

4. The air intake throttle valve according to claim 3, characterized in that The vent valve disc (32) and the anti-leakage valve disc (34) are rectangular valve discs, and the vent hole (31) is a prismatic hole that matches the shape of the rectangular valve disc. Along the direction perpendicular to the axis of the valve body (1), the width of the vent hole (31) is L, 1.2D≤L≤2D, wherein D is the diameter of the valve plate shaft (4).

5. The air intake throttle valve according to claim 3, characterized in that The anti-leakage valve plate (34) is located at one end of the vent hole (31) communicating with the valve cavity of the valve body (1); One end of the leak-proof valve disc (34) close to the valve disc (2) is rotatably connected to the valve body (1); The cavity wall of the valve body (1) includes a receiving groove (11) in communication with the vent hole (31), so that the anti-leakage valve disc (34) can rotate toward the valve disc (2) until it abuts against the cavity wall of the valve body (1).

6. The air intake throttle valve according to any one of claims 2 to 5, characterized in that: The vent valve plate (32) is located at an end of the vent hole (31) that is away from the valve cavity of the valve body (1); A limiting boss (36) is provided on the hole wall of the vent hole (31), and the limiting boss (36) is used to abut against the vent valve disc (32) when the vent valve disc (32) rotates to the upper limit position.

7. The air intake throttle valve according to claim 2, characterized in that The vent hole (31) is arranged obliquely along the movement direction of the intake air in the valve body (1).

8. The air intake throttle valve according to claim 2, characterized in that The included angle between the valve plate axis (4) of the valve plate (2) and the horizontal plane is 0°-180°.

9. A method for controlling an air intake throttle valve, characterized in that: include: The engine is in a heating mode, and the valve plate (2) of the intake throttle valve is adjusted to open to a preset opening; Opening the venting member (3) to discharge excess intake air entering the intake throttle valve; The excess intake air is the portion of the engine's actual intake air exceeding the required intake air when the engine is in a heating mode and the valve plate (2) is opened to a preset opening; The preset opening is the minimum opening of the intake throttle valve at which the intake pressure is stable.

10. The method for controlling an intake throttle valve according to claim 9, wherein: Open the venting member (3), specifically: Open the anti-leakage valve (34); The vent valve plate (32) is opened to a required opening, wherein the required opening is an opening capable of discharging the excess intake air.

11. The method for controlling an intake throttle valve according to claim 10, wherein: When the engine is in a non-heating mode, the anti-leakage valve plate (34) is opened and the vent valve plate (32) is closed to allow foreign matter in the intake air to enter the vent hole (31).

12. The method for controlling an intake throttle valve according to claim 11, wherein: When the engine is in a non-heating mode, the anti-leakage valve plate (34) is opened and the vent valve plate (32) is closed to allow foreign matter in the intake air to enter the vent hole (31), and the method further includes judging whether the amount of foreign matter accumulated on the vent valve plate (32) exceeds a preset amount. When the amount of foreign matter accumulated on the vent valve plate (32) exceeds the preset amount, the anti-leakage valve plate (34) is closed and the vent valve plate (32) is opened to discharge the foreign matter from the vent hole (31).

13. The method for controlling an intake throttle valve according to claim 12, wherein: Determine whether the amount of foreign matter accumulated on the vent valve plate (32) exceeds a preset amount, specifically: Based on a mapping table of engine speed, actual intake air flow and motor preset torque base value, a motor preset torque base value corresponding to the engine speed and actual intake air flow is obtained; According to the actual intake pressure and the motor preset torque correction coefficient table, the motor preset torque base value is corrected to obtain the motor preset torque; Get the actual torque of the motor; Obtaining a torque difference between the actual torque of the motor and the preset torque of the motor; The torque difference is compared with a torque difference threshold value, and if the torque difference is greater than the torque difference threshold value, it is determined that the amount of foreign matter accumulated on the vent valve plate (32) exceeds a preset amount.

14. The method for controlling an intake throttle valve according to claim 13, wherein: Comparing the torque difference with a torque difference threshold, and if the torque difference is greater than the torque difference threshold, determining that the amount of foreign matter accumulated on the vent valve plate (32) exceeds a preset amount, further comprising: When the torque difference is less than or equal to a torque difference threshold, it is determined that the amount of foreign matter accumulated on the vent valve plate (32) does not exceed a preset amount, and the anti-leakage valve plate (34) and the vent valve plate (32) do not operate.

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