Supercharger air inlet pipe and engine air inlet system

Abstract

The utility model discloses a supercharger air inlet pipe and an engine air inlet system. The supercharger air inlet pipe comprises a main pipe body and a box body which is located in a local section of the main pipe body and protrudes out of the radial side of the main pipe body. A box cavity of the box body forms a water storage cavity, and a cavity opening is formed in the pipe wall of the main pipe body. The main pipe body sequentially comprises an inclined pipe section and a smooth pipe section which are connected in the gas flowing direction, a pipe cavity of the inclined pipe section is obliquely arranged relative to a pipe cavity of the smooth pipe section, a cavity opening of the water storage cavity is located on the downstream portion of the gas inlet end of the inclined pipe section, and the inner pipe wall of the inclined pipe section is connected with the cavity opening. And the water or the ice-water mixture flowing into the main pipe body is drained into the water storage cavity. The air inlet pipe of the supercharger effectively prevents condensed water from flowing into the supercharger on the basis of not influencing the air inlet amount and the air inlet efficiency, and solves the problem that in the prior art, the condensed water easily flows into the supercharger after parking in a low-temperature environment.

Description

Technical Field

[0001] This application relates to the technical field of vehicles, and particularly to a supercharger intake pipe and an engine intake system including the supercharger intake pipe. Background Art

[0002] Turbochargers are usually provided on vehicles to increase the intake air volume of the engine. The intake chamber of the turbocharger is connected to the intake system through an intake pipe. The exhaust pipe of the crankcase ventilation system is also connected to the intake system and is directly or indirectly connected to the supercharger intake pipe, so that the crankcase blow-by finally enters the supercharger. The temperature of the blow-by is high, and the temperature of the air in the intake system is low. Therefore, condensed water usually forms at the intersection of the exhaust pipe and the intake system. In low-temperature environments such as winter, the temperature of the air entering the intake pipe is low, and combined with the low ambient temperature, the condensed water will condense into ice and remain in the pipe. When the vehicle stops running and the supercharger stops taking in air, the ice cubes are melted by the residual heat of the engine system (partially or completely melted), and will flow into the supercharger along the pipeline. Since the vehicle is in a low-temperature environment in an unstarted state (such as a winter night), the water (or ice-water mixture) flowing into the supercharger will re-condense into ice and freeze the impeller in the supercharger, resulting in a temporary failure of the supercharger when the vehicle starts.

[0003] Currently, in the prior art, an interception component or structure (such as a partition with ventilation holes) is usually provided at the intersection of the exhaust pipe and the intake system such as the supercharger intake pipe to intercept the condensed water. However, since part of the pipe cavity is blocked, the intake air volume and intake efficiency of the supercharger will be significantly reduced, affecting the intake performance of the engine. Utility Model Content

[0004] In view of this, the embodiments of this application are committed to providing a supercharger intake pipe that can effectively prevent condensed water from flowing into the supercharger without affecting the intake air volume and intake efficiency, and solves the problem that condensed water is likely to be generated in a low-temperature environment and flow into the supercharger after parking in the prior art.

[0005] This application provides a supercharger intake pipe, which includes a main pipe body and a box body located in a partial section of the main pipe body and protruding from one radial side of the main pipe body. The box cavity of the box body forms a water storage cavity, and the cavity opening is provided on the pipe wall of the main pipe body; along the gas flow direction, the main pipe body sequentially includes a connected inclined pipe section and a flat pipe section. The pipe cavity of the inclined pipe section is inclined with respect to the pipe cavity of the flat pipe section. The cavity opening of the water storage cavity is located downstream of the intake end of the inclined pipe section, and the inner pipe wall of the inclined pipe section is connected to the cavity opening to drain the water or ice-water mixture flowing into the main pipe body into the water storage cavity.

[0006] In a possible implementation, a drainage baffle is provided on the inner tube wall of the inclined tube section, which extends obliquely from the radially outer side of the orifice of the water storage cavity towards the orifice. Alternatively, the central angle corresponding to the width of the orifice of the water storage cavity in the circumferential direction of the main body is at least 90°, preferably 120° - 150°.

[0007] In a possible implementation, an acute angle side and an obtuse angle side are formed at the connection between the inclined tube section and the gentle tube section. The water storage cavity is located on the obtuse angle side, and part of the orifice is opened on the inclined tube section and part of the orifice is opened on the gentle tube section.

[0008] In a possible implementation, the box body includes: an upper box part, which is integrally structured with the main body; a lower box part, which is detachably connected, bonded or welded to the upper box part.

[0009] In a possible implementation, the upper box part and the lower box part are provided with a docking and positioning structure.

[0010] In a possible implementation, the water storage cavity has a first side wall closer to the air inlet end and a second side wall opposite to the first side wall in the axial direction of the main body. The first side wall and the bottom wall of the water storage cavity are connected by an obliquely arranged first inclined wall.

[0011] In a possible implementation, the water storage cavity has a first side wall closer to the air inlet end and a second side wall opposite to the first side wall in the axial direction of the main body. The second side wall and the bottom wall of the water storage cavity are connected by an obliquely arranged second inclined wall.

[0012] In a possible implementation, at least two spaced-apart partitions are provided in the water storage cavity, and reinforcing ribs are distributed on the partitions.

[0013] In a possible implementation, a clamping groove for a pipe joint to be inserted is provided on the outer wall of the air inlet end of the main body, so as to be connected to other pipe fittings or components of the air inlet system through a pipe joint structure, and an annular groove for a clamp to be embedded is provided at the air outlet end.

[0014] The present application also provides an engine air inlet system, including: a supercharger; an air inlet muffler, having a first inlet connected to the crankcase exhaust pipe and a second inlet connected to an air filter, and an air outlet; an air inlet pipe, connecting the air outlet of the air inlet muffler and the air inlet of the supercharger, and being the supercharger air inlet pipe as described in any one of the above; wherein, the air inlet end of the air inlet pipe is connected to the air inlet muffler through a pipe joint structure, and the air outlet end is connected to the supercharger through a sealing sleeve.

[0015] The supercharger intake pipe provided by the present application has a main pipe body including an inclined pipe section and a gentle pipe section with the pipe cavities connected at an angle, and a water storage cavity protruding outward from the main pipe body. At the same time, along the air flow direction, the inner pipe wall of the inclined pipe section extends to connect with the orifice of the water storage cavity. In the use state, the orifice of the water storage cavity is lower than the air inlet of the inclined pipe section, so the water or ice-water mixture flowing into the intake pipe will be diverted into the water storage cavity. In addition, since the water storage cavity protrudes from the pipe cavity of the main pipe body, the water or ice-water mixture will accumulate in the water storage cavity and cannot flow into the supercharger. With such a setting, not only can condensate or ice be effectively intercepted to prevent it from flowing into the supercharger and freezing the impeller, solving the problem in the prior art that condensate is likely to flow into the supercharger after parking in a low-temperature environment; at the same time, it will not form an obstruction in the pipe cavity, will not cover the pipe cavity, will not affect the air intake volume and air intake efficiency, and prevent adverse effects on the engine. Description of the Drawings

[0016] Figure 1 The figure shows a schematic structural diagram of the supercharger intake pipe in an embodiment of the present application;

[0017] Figure 2 The figure shows a schematic diagram of the connection between the supercharger intake pipe and the supercharger in an embodiment of the present application;

[0018] Figure 3 The figure shows a schematic structural diagram of the lower box part of the box body in an embodiment of the present application;

[0019] Figure 4 The figure shows a partial composition schematic diagram of the engine intake system in an embodiment of the present application.

[0020] Figures 1-4 Among them:

[0021] 1. Intake pipe; 10. Main pipe body; 101. Pipe cavity; 102. Card slot; 103. Ring-shaped groove; 11. Inclined pipe section; 12. Gentle pipe section; 20. Box body; 201. Water storage cavity; 202. First inclined wall; 203. Second inclined wall; 21. Upper box part; 22. Lower box part; 221. Partition; 222. Reinforcing rib; 223. Convex stop; 2. Sealing sleeve; 3. Supercharger; 4. Exhaust pipe; 5. Intake muffler. Detailed Embodiment

[0022] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0023] Please refer to the attached Figures 1-4, embodiments of the present application provide a supercharger intake pipe 1, hereinafter referred to as the supercharger intake pipe 1, which includes a main pipe body 10 and a box body 20 located in a partial section of the main pipe body 10 and protruding from one radial side of the main pipe body 10. The box cavity of the box body 20 forms a water storage cavity 201, and the cavity opening is directly opened on the pipe wall of the main pipe body 10, that is, the pipe body area of the main pipe body 10 that is connected to the box body 20 and opposite to the box cavity is missing to form an opening. It can also be said that a through-shaped opening is opened on the pipe wall of the main pipe body 10 to conduct the pipe cavity 101 and the water storage cavity 201, and this opening forms the cavity opening of the water storage cavity 201. Thus, the cavity opening of the water storage cavity 201 is an open structure, directly connected to the pipe cavity with a large opening, rather than a structure connected through multiple small holes.

[0024] Meanwhile, along the axial direction from intake to exhaust, the main pipe body 10 includes a connected inclined pipe section 11 and a flat pipe section 12. The inclined pipe section 11 is located upstream of the flat pipe section 12 and can be used to connect to the intake system; the flat pipe section 12 is used to connect to the supercharger 3. The pipe cavity of the inclined pipe section 11 is inclined relative to the pipe cavity of the flat pipe section 12. The water storage cavity 201 is located downstream of the intake end of the inclined pipe section 11. The cavity opening of the water storage cavity 201 has a height difference with the intake port of the inclined pipe section 11 in the radial direction, and the inner pipe wall of the inclined pipe section 11 is connected to the cavity opening of the water storage cavity 201. For example, the water storage cavity 201 is located on the inclined pipe section 11, or at the connection between the inclined pipe section 11 and the flat pipe section 12, or at the end of the flat pipe section 12 close to the inclined pipe section 11.

[0025] With such a setting, after the supercharger intake pipe 1 is connected to the vehicle, the cavity opening of the water storage cavity 201 is lower than the intake port of the inclined pipe section 11. Along the air flow direction, the inner pipe wall of the inclined pipe section 11 extends obliquely downward to connect to the cavity opening of the water storage cavity 201. Then, after the vehicle is deactivated, the ice condensed at the connection between the crankcase exhaust pipe 4 and the intake system melts and flows into the supercharger intake pipe 1. The water or the water-ice mixture will be directly diverted into the water storage cavity 201. In addition, since the water storage cavity 201 protrudes from the pipe cavity of the main pipe body 10, the water or the water-ice mixture will accumulate in the water storage cavity 201 and cannot flow into the supercharger 3.

[0026] It can be seen that the supercharger intake pipe 1 provided by the present application can not only effectively intercept condensed water or ice and prevent it from flowing into the supercharger 3, solving the problem that the condensed water in the intake system freezes into ice in a low-temperature environment such as winter, remains in the pipe, and melts when the engine stops running and flows into the supercharger 3, resulting in the impeller being frozen in a low-temperature environment and causing the supercharger 3 to fail briefly when the vehicle is started next time. At the same time, it will not form an obstruction in the pipe cavity, will not affect the intake air volume and intake efficiency, and prevent adverse effects on the engine.

[0027] The water or ice-water mixture flowing into the water storage cavity 201 will volatilize into the air under the blowing action of the temperature and the air flow in the supercharger intake pipe 1 during the next engine operation, so it can be discharged without treatment, and there will be no problem that the water storage cavity 201 is filled with water and overflows into the pipe cavity. Of course, in some embodiments, a drain valve can also be provided on the water storage cavity 201 to selectively drain the water in the water storage cavity 201. Or, the box body 20 is detachably connected to the main pipe body 10, and the box body 20 can be selected to be removed for water accumulation cleaning, and so on.

[0028] It should be noted that in this application, the lumen of the inclined pipe section 11 and the lumen of the flat pipe section 12 are connected at an angle. The inclined pipe section 11 means that the lumen of this pipe section is inclined relative to the lumen of the flat pipe section 12, but it is not limited that the outer wall of the inclined pipe section 11 is also inclined relative to the outer wall of the flat pipe section 12. It can be that the lumen of the main pipe body 10 is divided into two sections connected at an angle, but the wall thicknesses of the two sections are different, and the outer surface of the main pipe body 10 is still a straight pipe. Of course, in a preferred embodiment, as shown in the drawings, the wall thicknesses of the two sections are the same or differ little, and the main pipe body 10 generally includes two pipe bodies connected at an angle and inclined relative to each other, and these two pipe bodies form the inclined pipe section 11 and the flat pipe section 12.

[0029] The two ends of the cavity opening of the water storage cavity 201 in the axial direction are respectively an air inlet end and an air outlet end. To ensure that the water or ice-water mixture entering the supercharger intake pipe 1 can fall into the water storage cavity 201, a drainage structure can be provided at the air inlet end of the cavity opening, such as a drainage baffle erected on the inner wall of the inclined pipe section 11. There are two groups of drainage baffles, which are arranged on both sides of the cavity opening in the radial direction and both extend obliquely from the outside of the cavity opening to the cavity opening. The two groups of drainage baffles are in a gradually converging shape to prevent the condensed water from flowing away from the outside of the cavity opening and entering the supercharger 3.

[0030] Or, the central angle corresponding to the width of the cavity opening of the water storage cavity 201 in the circumferential direction of the main pipe body 10 is at least 90°, preferably 120° - 150°. In this way, combined with the action of gravity, it can also ensure that the condensed water or ice-water mixture can all flow into the water storage cavity 201 and will not flow away from both sides in the radial direction of the water storage cavity 201.

[0031] As described above, the inner wall of the inclined pipe section 11 is connected to the cavity opening of the water storage cavity 201. Then, the water storage cavity 201 can be arranged on the inclined pipe section 11, or at the connection between the inclined pipe section 11 and the flat pipe section 12, or at the end of the flat pipe section 12 close to the inclined pipe section 11. In a preferred embodiment, as Figure 1 and Figure 2As shown in the figure, the water storage cavity 201 is located at the connection between the inclined pipe section 11 and the flat pipe section 12. The connection between the inclined pipe section 11 and the flat pipe section 12 forms a corner, which has an inner side of the corner with an acute angle and an outer side of the corner with an obtuse angle. The water storage cavity 201 is located on the outer side of the corner with an obtuse angle; and part of the cavity opening is arranged on the inclined pipe section 11 and part of the cavity opening is arranged on the flat pipe section 12. With such a setting, not only is the flow guiding effect of the inclined pipe section 11 good, but also since the water storage cavity 201 extends to the flat pipe section 12, it can ensure that the water or the water-ice mixture entering the supercharger intake pipe 1 will directly flow into the water storage cavity 201.

[0032] As Figure 1 , 2 As shown in Figures 2 and 3, the box body 20 includes two connected parts, which are divided into an upper box part 21 and a lower box part 22. The upper box part 21 and the main body 10 are of an integral structure, and can be in the shape of a cylinder or a box with both ends open, and can be surrounded by four plate bodies connected end to end in sequence; the lower box part 22 is in the shape of a box and is detachably connected, bonded or welded to the upper box part 21. With such a setting, only the upper box part 21 and the main body 10 are integrally injection-molded, and it will not protrude too much from the main body 10, which is convenient for demolding and production.

[0033] In a preferred embodiment, the lower box part 22 and the upper box part 21 can be welded together by a plastic welding process such as vibration friction welding to enhance the connection stability and sealing performance, and there is no need to set a sealing ring.

[0034] The upper box part 21 and the lower box part 22 are provided with a docking positioning structure to enhance the position accuracy of docking and improve the connection processing efficiency. Specifically, the docking positioning structure can include a docking groove such as a concave stop opening arranged on either the upper box part 21 or the lower box part 22 and a docking protrusion such as a convex stop opening 223 on the other.

[0035] As Figure 1 As shown in the figure, in some embodiments, the water storage cavity 201 has a first side wall closer to the intake end and a second side wall opposite to the first side wall in the axial direction of the main body 10. The first side wall and the bottom wall of the water storage cavity 201 are connected by an inclined first inclined wall 202. In some embodiments, the water storage cavity 201 has a first side wall closer to the intake end and a second side wall opposite to the first side wall in the axial direction of the main body 10. The second side wall and the bottom wall of the water storage cavity 201 are connected by an inclined second inclined wall 203.

[0036] The cross-section of the whole water storage cavity 201 or the lower half of the water storage cavity 201 can be trapezoidal, and along the direction from the cavity opening to the cavity bottom, the axial length of the water storage cavity 201 or the lower box part 22 gradually decreases. In this way, it helps the airflow to take away the moisture in the water storage cavity 201 and is conducive to the volatilization of moisture.

[0037] In some embodiments, there are at least two spaced-apart partition plates 221 in the water storage cavity 201. For example, partition plates 221 arranged radially along the main pipe body 10 are provided in the lower box part 22, and reinforcing ribs 222 are distributed on the partition plates 221. With such an arrangement, not only can the overall strength of the box body 20 be enhanced, but after ice cubes fall into the water storage cavity 201, the partition plates 221 with reinforcing ribs 222 have a blocking effect on preventing the ice cubes from being blown out of the water storage cavity 201 by the air flow.

[0038] A clamping groove 102 for a pipe joint to be inserted is provided on the outer wall of the air inlet end of the main pipe body 10 so as to be connected to a corresponding pipe joint, and an annular groove 103 for a clamp to be embedded is provided at the air outlet end. In this way, after the supercharger inlet pipe 1 is hermetically connected to the supercharger 3 through the sealing sleeve 2, it is then tightened with a clamp. The clamp is embedded in the annular groove 103, and it is not easy to be displaced, enhancing the connection stability; while the supercharger inlet pipe 1 can be connected to other pipe fittings or components of the intake system through a pipe joint structure, with a stable connection and convenient connection operation.

[0039] An embodiment of the present application also provides an engine intake system, including a supercharger 3, an intake muffler 5, a supercharger inlet pipe 1, etc. Among them, the intake muffler 5 has a first inlet connected to the crankcase exhaust pipe 4 respectively, a second inlet connected to the air filter, and an air outlet; the supercharger inlet pipe 1 is connected to the air outlet of the intake supercharger 3 and the air inlet of the supercharger 3, and is the supercharger inlet pipe 1 described in any of the above embodiments. With such an arrangement, this engine intake system solves the problem that condensed water flows into the supercharger 3 after parking without affecting the intake air volume and intake efficiency.

[0040] Among them, the air inlet end of the supercharger inlet pipe 1 is connected to the intake muffler 5 through a pipe joint structure, and the air outlet end is connected to the supercharger 3 through a sealing sleeve 2.

[0041] The basic principle of the present application has been described above in combination with specific embodiments. However, it should be noted that the advantages, advantages, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, advantages, effects, etc. are essential for each embodiment of the present application. In addition, the above-disclosed specific details are only for the purposes of illustration and easy understanding, rather than limitations, and the above details do not limit the present application to necessarily adopt the above specific details to be implemented.

[0042] The components and devices involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the drawings. As those skilled in the art will recognize, these components and devices can be connected, arranged, and configured in any way. Words such as "including", "comprising", "having", etc. are open-ended terms, meaning "including but not limited to", and can be used interchangeably with each other. The word "or" and "and" used herein refer to the phrase "and / or", and can be used interchangeably with it, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to", and can be used interchangeably with it.

[0043] It should also be noted that in the devices and equipment of this application, the components can be disassembled and / or recombined. These disassembly and / or recombination should be regarded as equivalent solutions of this application.

[0044] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

[0045] The above description has been given for purposes of illustration and description. In addition, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof.

[0046] The above are only the preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

1. A supercharger intake pipe, characterized in that, It includes a main pipe body and a box body located in a partial section of the main pipe body and protruding from one radial side of the main pipe body. The box cavity of the box body forms a water storage cavity, and the cavity opening is provided on the pipe wall of the main pipe body. Along the gas flow direction, the main pipe body includes a connected inclined pipe section and a gentle pipe section. The pipe cavity of the inclined pipe section is inclined relative to the pipe cavity of the gentle pipe section. The cavity opening of the water storage cavity is located downstream of the air inlet end of the inclined pipe section, and the inner pipe wall of the inclined pipe section is connected to the cavity opening to drain the water or ice-water mixture flowing into the main pipe body into the water storage cavity.

2. The supercharger intake pipe according to claim 1, wherein, A drainage baffle inclinedly extending from the radially outer side of the cavity opening of the water storage cavity towards the cavity opening is provided on the inner pipe wall of the inclined pipe section. Alternatively, the central angle corresponding to the width of the cavity opening of the water storage cavity in the circumferential direction of the main pipe body is at least 90°.

3. The supercharger intake pipe according to claim 1, characterized in that, Axially of the main pipe body, part of the cavity opening of the water storage cavity is provided on the inclined pipe section and part of the cavity opening is provided on the gentle pipe section.

4. The supercharger intake pipe according to claim 1, wherein The box body includes: an upper box part, which is integrally structured with the main pipe body; a lower box part, which is detachably connected, bonded or welded to the upper box part.

5. The supercharger intake pipe according to claim 4, wherein, The upper box part and the lower box part are provided with a butt joint positioning structure.

6. The supercharger intake pipe according to claim 1, characterized in that, Axially of the main pipe body, the water storage cavity has a first side wall closer to the air inlet end and a second side wall opposite to the first side wall. The first side wall and the bottom wall of the water storage cavity are connected by an inclined first inclined wall.

7. The supercharger intake pipe according to claim 1, wherein Axially of the main pipe body, the water storage cavity has a first side wall closer to the air inlet end and a second side wall opposite to the first side wall. The second side wall and the bottom wall of the water storage cavity are connected by an inclined second inclined wall.

8. The supercharger intake pipe according to claim 1, characterized in that, At least two spaced partitions are provided in the water storage cavity, and reinforcing ribs are distributed on the partitions.

9. The supercharger intake pipe according to claim 1, wherein, A clamping groove for a pipe joint to be inserted into is provided on the outer wall of the air inlet end of the main pipe body so as to be connected to other pipe fittings or components of the air inlet system through a pipe joint structure, and an annular groove for a clamp to be embedded is provided at the air outlet end.

10. An engine intake system, characterized in that, It includes: a supercharger; an intake muffler, which has a first inlet respectively connected to the crankcase exhaust pipe, a second inlet connected to the air filter, and an air outlet; an intake pipe, which connects the air outlet of the intake muffler and the air inlet of the supercharger, and is the supercharger intake pipe according to any one of claims 1-9; wherein, the air inlet end of the intake pipe is connected to the intake muffler through a pipe joint structure, and the air outlet end is connected to the supercharger through a sealing sleeve.

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