Intake manifold assembly, engine and vehicle
By setting up a distribution chamber and an intake passage structure in the intake manifold, and by designing an inclined throttle valve plate, the problem of throttle body icing in low-temperature environments was solved, enabling normal engine operation and noise reduction.
Patent Information
- Application Number
- CN202520154666.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2035-01-22
AI Technical Summary
In low-temperature environments, the crankcase exhaust gas mixes with fresh air and freezes on the inner wall of the intake manifold, causing the throttle body to freeze and affecting the normal operation of the engine.
A flow channel is set inside the intake manifold between the distribution chamber and the intake duct. The crankcase exhaust gas and fresh air are mixed in the intake duct. The cross-sectional area of the flow channel is larger than that of the crank pipe. The distribution chamber is located above the intake duct. The throttle valve plate is set at an angle to prevent water droplets from accumulating.
It reduces the possibility of throttle body icing, reduces turbulence generation, reduces intake noise, and ensures normal engine operation.
Smart Images
Figure CN223562948U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of vehicles, in particular to an air intake manifold assembly, an engine and a vehicle. BACKGROUND
[0002] In the related art, in order to improve fuel economy and reduce pollutant emissions, the engine introduces the crankcase exhaust gas into the intake pipe, and one of the exhaust gases is directly introduced into the intake manifold, mixed with fresh air in the intake manifold, and then enters each cylinder to participate in combustion.
[0003] When the vehicle is running in a low-temperature environment, the fresh air entering the intake manifold through the throttle valve has a low temperature (for example, -10℃ and below), and the crankcase exhaust gas contains water vapor. When the exhaust gas is mixed with the fresh air at a low temperature, the water vapor contained in the exhaust gas will freeze on the inner wall of the intake manifold. During the operation of the vehicle, as the engine temperature rises, the ice on the inner wall of the intake manifold will melt. When the throttle opening is small or the engine is stopped, the liquid water droplets will slide down the inner wall to the throttle valve, which can easily cause the throttle valve to freeze and cause the throttle valve to jam, thereby affecting the normal operation of the engine. CONTENT OF THE INVENTION
[0004] The embodiments of the present application provide an air intake manifold assembly, an engine and a vehicle, which are designed to reduce the possibility of throttle valve icing, thereby facilitating the normal operation of the engine.
[0005] The specific technical solutions are as follows:
[0006] In a first aspect, the embodiments of the present application provide an air intake manifold assembly, which comprises: an air intake manifold, the inside of the air intake manifold being formed with a pressure stabilizing chamber, a distribution chamber and a plurality of air intake channels, the air intake manifold being provided with an air inlet communicating with the pressure stabilizing chamber, the air inlet being provided with a throttle valve, the plurality of air intake channels being in communication with the pressure stabilizing chamber, and each of the air intake channels being provided with a flow channel between the distribution chamber, each of the air intake channels being in communication with the distribution chamber through the flow channel; and an interface pipe, the interface pipe being connected with the air intake manifold, the interface pipe being in communication with the distribution chamber, the interface pipe being used to be connected with a crankcase passage, and the crankcase passage being used to introduce crankcase exhaust gas; wherein the cross-sectional area of any flow channel is greater than or equal to the cross-sectional area of the inner passage of the crankcase passage.
[0007] The intake manifold assembly in the embodiments of the present application, wherein the intake manifold is internally formed with a distribution cavity, and a flow channel is arranged between the distribution cavity and each intake port, and each intake port is communicated with the distribution cavity through the flow channel. In this way, the crankcase exhaust gas is mixed with fresh air in the intake port and then directly enters the combustion chamber of the cylinder. Since the mixing position of the crankcase exhaust gas and fresh air is in the intake port instead of in the constant pressure cavity, it is beneficial to avoid the ice on the inner wall of the constant pressure cavity caused by the water vapor in the crankcase exhaust gas, thereby avoiding the situation that the ice on the inner wall of the constant pressure cavity flows to the throttle valve after being liquefied, so as to reduce the possibility of the throttle valve icing and facilitate the normal operation of the engine.
[0008] In addition, the intersection position of the crankcase exhaust gas and fresh air is prone to generate vortex, and the vortex is prone to cause intake noise. In view of this phenomenon, the embodiments of the present application take targeted measures, that is, the cross-sectional area of any flow channel is greater than or equal to the cross-sectional area of the inner cavity of the runner pipe. Under the condition of meeting the above condition, the flow rate of the crankcase exhaust gas entering the intake port can be reduced, thereby reducing the flow rate difference between the crankcase exhaust gas and fresh air, so as to reduce the probability of vortex generation, thereby helping to reduce or eliminate the intake noise.
[0009] In some embodiments of the present application, the inner diameter of the interface pipe is greater than or equal to the inner diameter of the runner pipe; the extension direction of the distribution cavity intersects with the length direction of the interface pipe, and the cross-sectional area of the distribution cavity in any plane perpendicular to the extension direction of the distribution cavity is greater than or equal to the cross-sectional area of the pipe passage in the interface pipe.
[0010] In this way, the flow rate of the crankcase exhaust gas does not increase when entering the interface pipe from the runner pipe, and then the flow rate of the exhaust gas decreases to a certain extent when entering the distribution cavity from the interface pipe, thereby further reducing the flow rate of the exhaust gas entering the intake port and inhibiting the generation of vortex.
[0011] In some embodiments of the present application, when the intake manifold assembly is installed on a vehicle, the distribution cavity is located above the intake port.
[0012] In this way, it is beneficial to avoid the water vapor condensation to form the accumulated liquid in the distribution cavity, thereby avoiding the ice formation in the distribution cavity in a low-temperature environment.
[0013] In some embodiments of the present application, the intake manifold comprises: an upper cover body; a lower cover body, the upper cover body being connected with the lower cover body, the upper cover body and the lower cover body jointly defining the pressure stabilizing cavity, the intake passages being formed in the upper cover body, and the air inlet being formed in the lower cover body; and a distribution cavity upper cover, the distribution cavity upper cover being located on a side of the upper cover body away from the lower cover body, the distribution cavity upper cover being connected with the upper cover body, the distribution cavity upper cover and the upper cover body jointly defining the distribution cavity.
[0014] The intake manifold is assembled from multiple parts such as the upper cover body, the lower cover body, and the distribution cavity upper cover, and each part can be independently manufactured and processed. In this way, on the one hand, the manufacturing difficulty can be reduced, and on the other hand, the manufacturing precision can be ensured, and the processing error can be reduced.
[0015] In some embodiments of the present application, the number of intake passages is even, and along the extension direction of the distribution cavity, the interface pipe is located between the two intake passages in the middle; or the number of intake passages is odd, and along the extension direction of the distribution cavity, the interface pipe is opposite to the intake passage in the middle.
[0016] In this way, it is beneficial to avoid the situation that the intake passage located at the end is separated from the interface pipe by a relatively large number of flow channels, thereby causing the amount of exhaust gas entering the intake passage to be significantly reduced. That is, the above arrangement is beneficial to improve the uniformity of the distribution of exhaust gas to each intake passage.
[0017] In some embodiments of the present application, when the intake manifold assembly is installed on a vehicle, the throttle valve is located at the bottom of the intake manifold; the throttle valve comprises a main body and a valve plate, the main body is formed with an air inlet passage, and the valve plate is arranged in the air inlet passage and is used to open or close the air inlet passage; wherein when the valve plate closes the air inlet passage, the included angle between the valve plate and the horizontal plane is greater than 0°.
[0018] In this way, even if water droplets slide along the inner wall of the intake manifold to the valve plate, due to the inclination of the valve plate relative to the horizontal plane, the water droplets will flow along the valve plate to the lowest end of the valve plate. Generally, the end of the valve plate is not completely sealed with the main body, and there is a certain gap between the end of the valve plate and the inner wall of the air inlet passage. In this way, the water droplets flowing to the bottom end of the valve plate can flow out through the gap, thereby preventing the water droplets from being retained on the valve plate and causing the valve plate to freeze.
[0019] In some embodiments of the present application, when the valve plate closes the air inlet passage, the included angle between the valve plate and the horizontal plane is greater than or equal to 10°.
[0020] In this way, the valve plate is inclined relative to the horizontal plane more obviously, so that the water droplets falling on the valve plate can be more easily guided to the lowest end of the valve plate, and then flow out through the gap between the inner wall of the air inlet channel and the valve plate.
[0021] In a second aspect, an engine is provided, which comprises the intake manifold assembly according to any one of the above embodiments.
[0022] The engine provided by the embodiments of the present application has the same inventive concept as the intake manifold assembly in the above embodiments, and therefore, the engine provided by the embodiments of the present application can have all the technical features and corresponding beneficial effects of the intake manifold assembly in the above embodiments.
[0023] In some embodiments of the present application, the engine further comprises a cylinder head provided with a plurality of cylinder head air passages; the intake manifold is connected to the cylinder head, and the intake passage is in communication with the cylinder head air passages; and the port passage is fixed to the cylinder head.
[0024] When the engine is working, the cylinder head has a high temperature, and the port passage is fixed to the cylinder head. The heat of the cylinder head can be transferred to the port passage, which is beneficial to keeping the crankcase exhaust gas in the port passage at a certain temperature, thereby reducing the possibility of water vapor in the exhaust gas condensing into water or ice.
[0025] In a third aspect, a vehicle is provided, which comprises the engine according to any one of the above embodiments.
[0026] The vehicle provided by the embodiments of the present application has the same inventive concept as the engine in the above embodiments, and therefore, the vehicle provided by the embodiments of the present application can have all the technical features and corresponding beneficial effects of the engine in the above embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0027] Figure 1 A schematic view of the intake manifold assembly provided by an embodiment of the present application connected to the crankcase through a port passage;
[0028] Figure 2 A structural schematic view of the intake manifold assembly provided by an embodiment of the present application;
[0029] Figure 3 A structural schematic view of the intake manifold assembly provided by an embodiment of the present application from another perspective;
[0030] Figure 4 A Figure 3 A sectional view in the direction of A-A;
[0031] Figure 5 A Figure 4Enlarged view of the middle part D;
[0032] Figure 6 Schematic view of the communication relationship of the curve pipe, interface pipe, distribution cavity, flow channel and air inlet channel provided for an embodiment of the present application;
[0033] Figure 7 Schematic view of the air intake manifold provided for an embodiment of the present application;
[0034] Figure 8 Schematic view of the structure of the air intake manifold provided for an embodiment of the present application (the distribution cavity upper cover is hidden);
[0035] Figure 9 Schematic view of the middle part B; Figure 8 Enlarged view of the middle part B;
[0036] Figure 10 Schematic view of the air intake manifold assembly provided for an embodiment of the present application;
[0037] Figure 11 Schematic view of the middle part C-C direction; Figure 10
[0038] Explanation of the reference numerals in the drawings is as follows:
[0039] 100, air intake manifold; 101, pressure stabilizing cavity; 102, distribution cavity; 103, air inlet channel; 104, flow channel; 105, interface pipe; 106, air inlet; 110, upper cover body; 120, lower cover body; 130, distribution cavity upper cover;
[0040] 200, throttle valve; 210, main body; 220, valve plate;
[0041] 300, curve pipe;
[0042] 400, crankcase. DETAILED DESCRIPTION
[0043] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.
[0044] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the positional relationship described in the drawings is only for exemplary illustration, and cannot be understood as a limitation of the present patent, for those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0045] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as implying or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.
[0046] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0047] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration, and do not represent the only implementation.
[0048] In the related art, in order to improve fuel economy and reduce pollutant emissions, the engine introduces the crankcase exhaust gas into the intake pipeline, one way of which is directly introduced into the intake manifold, mixed with fresh air in the intake manifold, and then enters each cylinder to participate in combustion.
[0049] When the vehicle is running in a low temperature environment, the fresh air entering the intake manifold through the throttle valve has a low temperature (for example, -10℃ and below), the crankcase exhaust gas contains water vapor, and after the exhaust gas mixes with the fresh air at a low temperature, the water vapor contained in the exhaust gas will freeze on the inner wall of the intake manifold. During the operation of the vehicle, as the engine temperature rises, the ice on the inner wall of the intake manifold will melt. When the throttle opening is small or the engine is stopped, the water droplets will slide along the inner wall to the throttle valve, which can easily cause the throttle valve to freeze and cause the throttle valve to be stuck, thereby affecting the normal operation of the engine.
[0050] Based on the above, the embodiment of the first aspect of the present application provides an intake manifold assembly, which aims to reduce the possibility of throttle freezing to facilitate the normal operation of the engine.
[0051] Figure 1 A schematic view of the intake manifold assembly provided by an embodiment of the present application is shown in the connection of the through pipe and the crankcase; Figure 2 A structural schematic view of the intake manifold assembly provided by an embodiment of the present application is shown in the connection of the through pipe and the crankcase; Figure 3 A structural schematic view of the intake manifold assembly provided by an embodiment of the present application is shown in the connection of the through pipe and the crankcase; Figure 4 A structural schematic view of the intake manifold assembly provided by an embodiment of the present application is shown in the connection of the through pipe and the crankcase; Figure 3 A sectional view in the A-A direction of the intake manifold assembly provided by an embodiment of the present application is shown in the connection of the through pipe and the crankcase; Figure 5 A structural schematic view of the intake manifold assembly provided by an embodiment of the present application is shown in the connection of the through pipe and the crankcase; Figure 4 An enlarged schematic view of the D part of the intake manifold assembly provided by an embodiment of the present application is shown in the connection of the through pipe and the crankcase; Figure 6 A schematic view of the communication relationship among the through pipe, the interface pipe, the distribution cavity, the flow channel and the intake passage provided by an embodiment of the present application is shown in the connection of the through pipe and the crankcase; Figure 10 A top view of the intake manifold assembly provided by an embodiment of the present application is shown in the connection of the through pipe and the crankcase; Figure 11 A structural schematic view of the intake manifold assembly provided by an embodiment of the present application is shown in the connection of the through pipe and the crankcase; Figure 9 A sectional view in the C-C direction of the intake manifold assembly provided by an embodiment of the present application is shown in the connection of the through pipe and the crankcase.
[0052] As shown in Figures 1 to 6 , and Figure 10 , Figure 11 The intake manifold assembly in the embodiment of the present application includes an intake manifold 100 and an interface pipe 105. The intake manifold 100 has a stable pressure cavity 101, a distribution cavity 102 and a plurality of intake passages 103 formed inside. The intake manifold 100 is provided with an air inlet 106 communicating with the stable pressure cavity 101, the plurality of intake passages 103 communicate with the stable pressure cavity 101, and a flow channel 104 is arranged between the distribution cavity 102 and each intake passage 103. Each intake passage 103 communicates with the distribution cavity 102 through the flow channel 104. The interface pipe 105 is connected with the intake manifold 100, the interface pipe 105 communicates with the distribution cavity 102, the interface pipe 105 is used to be connected with the through pipe 300, and the through pipe 300 is used to introduce the crankcase exhaust gas. The cross-sectional area of any flow channel 104 is greater than or equal to the cross-sectional area of the inner passage of the through pipe 300.
[0053] Specifically, the intake passages 103 further open to the cylinders of the engine, and the number of the intake passages 103 is consistent with the number of the cylinders, and each of the intake passages 103 opens to a corresponding cylinder.
[0054] The throttle valve 200 is arranged at the air inlet 106 of the intake manifold 100, and the throttle valve 200 is used to control the intake of fresh air. After passing through the intake valve, the fresh air first enters the plenum chamber 101 and is further distributed to each of the intake passages 103, and then flows to each cylinder through the intake passages 103 to participate in combustion.
[0055] The throttle valve 200 can include a main body 210 and a valve plate 220, the main body 210 has an air inlet passage formed therein, and the valve plate 220 is arranged in the air inlet passage and is used to open or close the air inlet passage. When the air inlet passage is open, the external fresh air can enter the plenum chamber 101. The valve plate 220 can rotate relative to the main body 210, so that by controlling the rotation of the valve plate 220, the valve plate 220 can open or close the air inlet passage. Generally, the icing of the throttle valve 200 mainly refers to the icing of the valve plate 220, and the icing of the valve plate 220 will cause poor movement, thereby causing the throttle valve 200 to be stuck.
[0056] The bypass pipe 300 is connected with the crankcase 400 so as to introduce the crankcase exhaust gas into the intake manifold 100. Specifically, the intake manifold 100 has a distribution chamber 102 formed therein, and the bypass pipe 300 is connected with the intake manifold 100 through the interface pipe 105, so that the inner cavity of the bypass pipe, the inner cavity of the interface pipe 105 and the distribution chamber 102 are sequentially communicated. In this way, the crankcase exhaust gas first enters the distribution chamber 102 and then enters the corresponding intake passage 103 through each of the flow passages 104.
[0057] In the intake manifold assembly in the embodiment of the present application, the intake manifold 100 has a distribution chamber 102 formed therein, and each of the intake passages 103 is provided with a flow passage 104, and each of the intake passages 103 is communicated with the distribution chamber 102 through the flow passage 104. In this way, the crankcase exhaust gas is mixed with the fresh air in the intake passage 103 and then directly enters the combustion chamber of the cylinder. Since the mixing position of the crankcase exhaust gas and the fresh air is in the intake passage 103 rather than in the plenum chamber 101, it is beneficial to avoid the icing of the water vapor in the crankcase exhaust gas on the inner wall of the plenum chamber 101, thereby avoiding the case that the ice on the inner wall of the plenum chamber 101 is liquefied and flows to the throttle valve 200, so as to reduce the possibility of the icing of the throttle valve 200, thereby being beneficial to ensure the normal operation of the engine.
[0058] In addition, the intersection of the crankcase exhaust gas and the fresh air is prone to vortex, which is prone to cause intake noise. In view of this phenomenon, the embodiment of the application adopts a targeted means, that is, the cross-sectional area of any flow channel 104 is greater than or equal to the cross-sectional area of the inner cavity of the port tube 300. Under the condition of meeting the above condition, the flow rate of the crankcase exhaust gas entering the intake port 103 can be reduced, thereby the flow rate difference between the crankcase exhaust gas and the fresh air can be reduced, so that the probability of vortex generation can be reduced, thereby helping to reduce or eliminate the intake noise.
[0059] As shown in Figure 5 , Figure 6 In some embodiments, the inner diameter of the interface pipe 105 is greater than or equal to the inner diameter of the port tube 300. The extension direction R of the distribution cavity 102 intersects the length direction of the interface pipe 105, and the cross-sectional area of the distribution cavity 102 in any plane perpendicular to the extension direction thereof is greater than or equal to the cross-sectional area of the pipe passage of the interface pipe 105.
[0060] In this way, the flow rate of the crankcase exhaust gas does not increase when entering the interface pipe 105 from the port tube 300, and then the flow rate of the exhaust gas decreases to a certain extent when entering the distribution cavity 102 from the interface pipe 105, thereby further reducing the flow rate of the exhaust gas entering the intake port 103, and inhibiting the generation of vortex.
[0061] Figure 7 An exploded schematic view of the intake manifold provided by an embodiment of the application; Figure 8 A structural schematic view of the intake manifold provided by an embodiment of the application (the upper cover of the distribution cavity is hidden); Figure 9 An enlarged schematic view of Figure 7 Part B in FIG. 8.
[0062] As shown in Figures 6 to 9 In some embodiments, when the intake manifold assembly is installed on a vehicle, the distribution cavity 102 is located above the intake port 103. In this way, it is beneficial to avoid water vapor condensation to form a liquid accumulation in the distribution cavity 102, thereby avoiding the liquid accumulation in the distribution cavity 102 from freezing in a low-temperature environment.
[0063] As shown in Figure 7As shown, in one embodiment, the intake manifold 100 includes an upper cover body 110, a lower cover body 120, and a distribution cavity upper cover 130. The upper cover body 110 is connected to the lower cover body 120, and the upper cover body 110 and the lower cover body 120 together define a pressure stabilization cavity 101. The intake passage 103 is formed in the upper cover body 110, and the intake port 106 is formed in the lower cover body 120. The distribution cavity upper cover 130 is located on the side of the upper cover body 110 away from the lower cover body 120, and the distribution cavity upper cover 130 is connected to the upper cover body 110. The distribution cavity upper cover 130 and the upper cover body 110 together define a distribution cavity 102.
[0064] That is, the intake manifold 100 is assembled from multiple parts such as the upper cover body 110, the lower cover body 120, and the distribution cavity upper cover 130, and each part can be independently manufactured and processed. In this way, on the one hand, the manufacturing difficulty can be reduced, and on the other hand, the manufacturing precision can be ensured, and the processing error can be reduced.
[0065] As shown in the drawings, Figure 6 In one embodiment, the number of intake passages 103 is even (for example, 2, 4, etc.), and the interface pipe 105 is located between the two intake passages 103 in the middle along the extension direction R of the distribution cavity 102. In this way, it is beneficial to avoid the situation that the intake passage 103 located at the end is separated from the interface pipe 105 by a large number of flow channels 104, resulting in a significant reduction in the amount of exhaust gas entering the intake passage 103. That is, the above arrangement is beneficial to improve the uniformity of the distribution of exhaust gas to each intake passage 103.
[0066] In another embodiment, the number of intake passages 103 is odd (for example, 3, 5, etc.), and the interface pipe 105 is opposite to the middle intake passage 103 along the extension direction R of the distribution cavity 102. Similarly, in this way, it is beneficial to avoid the situation that the intake passage 103 located at the end is separated from the interface pipe 105 by a large number of flow channels 104, resulting in a significant reduction in the amount of exhaust gas entering the intake passage 103. That is, the above arrangement is beneficial to improve the uniformity of the distribution of exhaust gas to each intake passage 103.
[0067] As shown in the drawings, Figure 4 In some embodiments, when the intake manifold assembly is installed on a vehicle, the throttle valve 200 is located at the bottom of the intake manifold 100. The throttle valve 200 includes a main body 210 and a valve plate 220. The main body 210 forms an air inlet passage, and the valve plate 220 is arranged in the air inlet passage and is used to open or close the air inlet passage. When the valve plate 220 closes the air inlet passage, the included angle between the valve plate 220 and the horizontal plane is greater than 0°.
[0068] For the vehicle with the throttle valve 200 arranged downwardly, the valve plate 220 in the embodiment has an angle greater than 0° with the horizontal plane when the valve plate 220 is in the state of closing the air inlet passage, so that even if the water droplets slide along the inner wall of the air inlet manifold 100 to the valve plate 220, the water droplets will flow along the valve plate 220 to the lowest end of the valve plate 220 due to the inclination of the valve plate 220 relative to the horizontal plane. Generally, the end of the valve plate 220 is not completely sealed with the main body 210, and there is a certain gap between the end of the valve plate 220 and the inner wall of the air inlet passage, so that the water droplets flowing to the lowest end of the valve plate 220 can flow out through the gap, thereby facilitating the prevention of the water droplets from being retained on the valve plate 220 to cause the valve plate 220 to freeze.
[0069] In a preferred embodiment, the valve plate 220 has an angle greater than or equal to 10° with the horizontal plane when the valve plate 220 closes the air inlet passage. If the angle of the valve plate 220 with the horizontal plane is too small (for example, greater than 0° but near 0°) when the valve plate 220 closes the air inlet passage, the water droplets falling on the valve plate 220 will be difficult to be guided to the lowest end of the valve plate 220, so that the water droplets are still easy to be retained on the valve plate 220. Therefore, in the embodiment, the valve plate 220 has an angle greater than or equal to 10° with the horizontal plane when the valve plate 220 is in the state of closing the air inlet passage, so that the valve plate 220 is inclined relative to the horizontal plane more obviously, thereby making the water droplets falling on the valve plate 220 more easily guided to the lowest end of the valve plate 220 and then flow out through the gap between the valve plate 220 and the inner wall of the air inlet passage.
[0070] The embodiment of the second aspect of the application provides an engine comprising the air inlet manifold assembly in any of the above embodiments.
[0071] The engine provided by the embodiment of the application has the same inventive concept as the air inlet manifold assembly in the above embodiments, and therefore, the engine provided by the embodiment of the application can have all the technical features and corresponding beneficial effects of the air inlet manifold assembly in the above embodiments.
[0072] In some embodiments, the engine further comprises a cylinder head (not shown in the figure) provided with a plurality of cylinder head air passages, the air inlet manifold 100 is connected to the cylinder head, and the air inlet passage 103 of the air inlet manifold 100 communicates with the cylinder head air passage, wherein the curve passage 300 is fixed to the cylinder head.
[0073] The cylinder head has a plurality of cylinder head air passages, each cylinder head air passage communicates with a corresponding cylinder. The air inlet manifold 100 is connected to the cylinder head, and the air inlet passage 103 of the air inlet manifold 100 communicates with the cylinder head air passage, so that the fresh air enters the cylinder of the engine through the air inlet passage 103 and the cylinder head air passage.
[0074] When the engine is working, the cylinder head has a high temperature. The passage 300 is fixed to the cylinder head, and the heat of the cylinder head is transferred to the passage 300. In this way, the crankcase exhaust gas in the passage 300 can be kept at a certain temperature, so that the possibility of water vapor in the exhaust gas condensing into water or ice can be reduced.
[0075] The embodiment of the third aspect of the present application provides a vehicle, which comprises the engine in any of the above embodiments.
[0076] The vehicle provided by the embodiment of the present application is based on the same inventive concept as the engine in the above embodiments, and therefore, the vehicle provided by the embodiment of the present application can have all the technical features and corresponding beneficial effects of the engine in the above embodiments.
[0077] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. An intake manifold assembly, characterized in that, include: An intake manifold, wherein an intake manifold internally forms a pressure regulating chamber, a distribution chamber, and multiple intake passages; the intake manifold has an intake port communicating with the pressure regulating chamber, and a throttle valve is installed on the intake port; the multiple intake passages are communicating with the pressure regulating chamber; a flow channel is provided between the distribution chamber and each intake passage, and each intake passage is communicating with the distribution chamber through the flow channel; and An interface pipe is connected to the intake manifold and communicates with the distribution chamber. The interface pipe is used to connect to a bend pipe, which is used to introduce crankcase exhaust gas. Wherein, the cross-sectional area of any of the flow channels is greater than or equal to the cross-sectional area of the inner channel of the curved pipe.
2. The intake manifold assembly according to claim 1, characterized in that, The inner diameter of the interface tube is greater than or equal to the inner diameter of the curved tube; The extension direction of the distribution cavity intersects the length direction of the interface tube, and the cross-sectional area of the distribution cavity in any plane perpendicular to its extension direction is greater than or equal to the cross-sectional area of the inner channel of the interface tube.
3. The intake manifold assembly according to claim 1, characterized in that, When the intake manifold assembly is installed in the vehicle, the distribution chamber is located above the intake passage.
4. The intake manifold assembly according to claim 3, characterized in that, The intake manifold includes: Upper cover; The lower cover body is connected to the upper cover body, and the upper cover body and the lower cover body together define the pressure stabilizing chamber. An air intake passage is formed in the upper cover body, and an air intake port is formed in the lower cover body; and A dispensing cavity cover is located on the side of the upper cover body opposite to the lower cover body. The dispensing cavity cover is connected to the upper cover body, and the dispensing cavity cover and the upper cover body together define the dispensing cavity.
5. The intake manifold assembly according to claim 3, characterized in that, The number of air intakes is even, and the interface pipe is located between two centrally located air intakes along the extension direction of the distribution cavity. Alternatively, the number of air intakes is odd, and along the extension direction of the distribution cavity, the interface pipe is opposite to one of the central air intakes.
6. The intake manifold assembly according to claim 1, characterized in that, When the intake manifold assembly is installed in the vehicle, the throttle valve is located at the bottom of the intake manifold; The throttle valve includes a body and a valve plate. The body forms an air intake channel, and the valve plate is disposed in the air intake channel. The valve plate is used to open or close the air intake channel. When the valve plate closes the air inlet channel, the angle between the valve plate and the horizontal plane is greater than 0°.
7. The intake manifold assembly according to claim 6, characterized in that, When the valve plate closes the air inlet channel, the angle between the valve plate and the horizontal plane is greater than or equal to 10°.
8. An engine, characterized in that, The intake manifold assembly includes any one of claims 1 to 7.
9. The engine according to claim 8, characterized in that, The engine also includes a cylinder head, which has multiple cylinder head air passages; The intake manifold is connected to the cylinder head, and the intake passage is connected to the cylinder head air passage; The curved pipe is fixed to the cylinder head.
10. A vehicle, characterized in that, Includes the engine as described in claim 8 or 9.