CN219587676U - Engine overhead air intake system for vehicle - Google Patents

Abstract

The utility model relates to an engine overhead air intake system for a vehicle, comprising: the filter cartridge includes a base, first and second covers connected to the base, and a filter cartridge disposed therein. The base is matched with the first cover to form a first chamber and a third chamber, and matched with the second cover to form a second chamber; the filter element is arranged in the second chamber and divides the second chamber into a second upper chamber and a second lower chamber. The first chamber is provided with an air inlet on one side and is in fluid communication with the second lower chamber on the other side, and the third chamber is provided with an air outlet on one side and is in fluid communication with the second upper chamber on the other side. By integrating the air cleaner on the engine hood, the present utility model improves the space utilization of the engine compartment, and enables the present utility model to be applied to an engine compartment having a narrow installation environment. Through the structural design of the utility model, the NVH performance of the air inlet system is improved, and the riding comfort of the vehicle is improved.

Description

Engine overhead air intake system for vehicle

Technical Field

The present disclosure relates to the field of air intake systems for vehicles, and more particularly, to an engine overhead air intake system for a vehicle.

Background

An air intake system of a vehicle is equipped with an air cleaner (air cleaner), and air introduced from the outside is filtered by a filter element (filter) in the air cleaner. The filtered air is supplied to the engine, which can prevent impurities, dust and the like in the air from entering the combustion chamber of the engine to cause damage to the engine.

Meanwhile, in order to improve riding comfort, the performance of NVH (Noise Vibration and Harshness) needs to be considered while the basic performance of the air intake system is ensured, and therefore other components (such as a silencing element and the like) often need to be arranged in the air intake system, so that the size of the existing air intake system is generally larger, and thus, a larger space requirement is required for an engine compartment.

With the advent of hybrid vehicles, the layout of the engine compartment became more complex, and the installation space left for the air intake system during the development of the whole vehicle was often limited, so that the space of the engine compartment was insufficient to be difficult to match with the existing air intake system, and the development of the whole vehicle was more difficult.

Based on the above situation, how to improve the NVH performance of the air intake system and improve the space utilization rate of the air intake system on the premise of ensuring the basic performance of the air intake system, so that the air intake system of the engine has better suitability is a problem which needs to be solved urgently at present.

The information disclosed in the background section of the utility model is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.

Disclosure of Invention

The utility model aims to provide an engine overhead type air inlet system for a vehicle, which can improve NVH performance of the air inlet system and improve space utilization rate of an engine cabin under the premise of combining basic functions of the air inlet system and an engine cover.

The present utility model provides an engine overhead air intake system for a vehicle, comprising: a base configured such that an edge thereof has an outer wall extending upward such that the base forms an inner space, the base having an inner wall to divide the inner space into a first space, a second space, and a third space; a first cover fixedly connected to the base at a position corresponding to the first space and the third space, the first cover having a partition wall inside to form a first chamber in cooperation with the first space and a third chamber in cooperation with the third space; a second cover detachably attached to the base at a position corresponding to the second space, and forming an engine cover covering over the engine together with the base and the first cover; and a filter element detachably provided in a second chamber formed by the second cover and the second space, and dividing the second chamber into a second upper chamber and a second lower chamber; wherein the first chamber is provided with an air inlet on one side and is in fluid communication with the second lower chamber on the other side, and the third chamber is provided with an air outlet on one side and is in fluid communication with the second upper chamber on the other side.

According to an exemplary embodiment of the present utility model, the inner wall of the base may further include: a first wall located at a position between the first space and the second space to separate the first space from the second space, the first wall extending from an inner bottom surface of the base in an upward direction to a partition wall provided at an inner top surface of the first cover; and a second wall located at a position between the first space and the second space and the third space to separate the first space and the second space from the third space, the second wall extending from the inner bottom surface of the base in an upward direction to a side edge of the first cover; wherein a portion of the second wall between the first chamber and the second lower chamber is provided open such that the first chamber is in fluid communication with the second lower chamber; the portion of the second wall between the third chamber and the second upper chamber is provided with an opening.

According to an exemplary embodiment of the present utility model, the first wall may further include a plate-shaped wall and a cylindrical wall located at a predetermined position of the plate-shaped wall, and the cylindrical wall may form a through hole corresponding to the engine oil filler; the first cover may have a service hole corresponding to the through hole and a service cover detachably mounted to the service hole.

According to an exemplary embodiment of the present utility model, the second cover may be further configured to have a sidewall extending downward at an edge thereof such that the second cover forms the second chamber in cooperation with the second space when mounted to the base, and a side of the sidewall of the second cover corresponding to the second wall is provided with a flow tuyere corresponding to the opening.

According to an exemplary embodiment of the present utility model, a lower portion of a side wall of the second cover corresponding to one side of the second wall may be provided with at least one connection protrusion, and the second wall may be provided with at least one connection baffle extending in a direction of the second cover at a position corresponding to the connection protrusion, the connection protrusion being insertable under the corresponding connection baffle and having an upper surface of the connection protrusion in close contact with a lower surface of the connection baffle; wherein, when the connection protrusion is inserted under the connection baffle and the connection protrusion upper surface is brought into close contact with the lower surface of the connection baffle, the flow tuyere is connected to the opening such that the second cover is mounted to the base and the second upper chamber is brought into fluid communication with the third chamber.

According to an exemplary embodiment of the present utility model, the engine overhead air intake system for a vehicle may further include: an air intake duct having one end in fluid communication with the outside; and a resonance duct having one end connected to the other end of the intake duct and the other end connected to the intake port of the first chamber, the resonance duct having a bellows structure.

According to an exemplary embodiment of the present utility model, the base may be provided with at least one air guide portion extending a predetermined height in an upward direction from an inner bottom surface of the base at a position corresponding to the second lower chamber, the air guide portion having an arc shape with one end near the first chamber and the other end near a middle of the second lower chamber, thereby guiding air flowing from the first chamber into the second lower chamber.

According to an exemplary embodiment of the present utility model, the engine overhead air intake system for a vehicle may further include: an air outlet hose having one end connected to an air outlet of the third chamber and having a bellows structure; a connection pipe having one end connected to the other end of the air outlet hose; and a resonator having one end connected to the other end of the connection pipe and the other end connected to an intake portion of a vehicle engine.

According to an exemplary embodiment of the present utility model, the engine overhead air intake system for a vehicle may further include: a flow guide pipe having one end mounted to the air outlet of the third chamber and the other end extending toward the inside of the third chamber to form a horn-like structure to collect and guide air in the third chamber to flow toward the air outlet; and an air flow sensor having one end connected to one end of the draft tube at the air outlet and the other end connected to the air outlet hose.

According to an exemplary embodiment of the present utility model, the service cover may further include: the maintenance cover comprises a maintenance cover body, wherein the upper surface of the maintenance cover body can be provided with a pinching part which can be pinched by a user to rotate the maintenance cover; a sealing member which may be provided to a side wall of the service cover body and extend in a circumferential direction of the side wall for sealing a gap between the service cover and the service hole; and at least two first locking parts which may protrude from a lower portion of the sidewall of the maintenance cap body in a radially outward direction and extend a first predetermined distance along a circumferential direction of the sidewall, and a locking groove may be formed between an upper surface of the first locking parts and a lower surface of the sealing member.

According to an exemplary embodiment of the present utility model, the upper portion of the cylindrical wall may be provided with at least two second catching portions at positions corresponding to the catching grooves, the second catching portions may protrude from the inner circumferential surface of the cylindrical wall in a radially inward direction and extend a predetermined distance in a circumferential direction of the inner circumferential surface such that a second predetermined distance remains between two adjacent second catching portions; the second predetermined distance is greater than or equal to the first predetermined distance.

According to an exemplary embodiment of the present utility model, the other three sides of the sidewall of the second cover may be provided with at least one snap connection; the base may be provided with at least one clasp at a position corresponding to the clasp connection portion.

According to an exemplary embodiment of the present utility model, the engine overhead air intake system for a vehicle may further include a hydrocarbon trap, which may be disposed in the third chamber.

With the above embodiments, the engine overhead intake system for a vehicle of the present utility model has the following advantageous effects: by integrating the air cleaner on the engine hood, the utility model improves the space utilization rate of the engine compartment on the premise of considering the basic functions of the air intake system and the engine hood, and can be applied to the engine compartment with a narrow installation environment. Through the structural design of the utility model, the NVH performance of the air inlet system is improved, and the riding comfort of the vehicle is improved.

In addition, by using the maintenance hole and the maintenance cover provided by the utility model, when the engine needs to be maintained (for example, engine oil is added or an engine oil scale is checked), the engine can be maintained without disassembling the air inlet system, so that the maintenance of the engine is more convenient.

The device of the present utility model has other features and advantages which will be apparent from or are set forth in detail in the accompanying drawings and the following embodiments, which are incorporated herein, and which together serve to explain the particular principles of the utility model.

Drawings

Fig. 1 is a schematic view of the overall structure of an engine overhead intake system for a vehicle according to an exemplary embodiment of the present utility model.

Fig. 2 is a schematic view of an internal configuration of an engine overhead intake system for a vehicle according to an exemplary embodiment of the present utility model.

Fig. 3 is a schematic cross-sectional view taken along line A-A in fig. 2, wherein the direction of air flow is shown.

Fig. 4 is a schematic cross-sectional view taken along line B-B in fig. 2, in which the direction of air flow is shown.

Fig. 5 and 6 are schematic views of a base of an engine overhead air intake system for a vehicle according to an exemplary embodiment of the present utility model.

Fig. 7 and 8 are schematic views of a first cover of an engine overhead air intake system for a vehicle according to an exemplary embodiment of the present utility model.

Fig. 9 is a schematic diagram of a second cover for an engine overhead air intake system of a vehicle according to an exemplary embodiment of the utility model.

Fig. 10 is a schematic view of an internal structure of a service cover according to an exemplary embodiment of the present utility model.

Fig. 11 is a schematic cross-sectional view taken along line C-C of fig. 1, showing the mating relationship of the service cover with the second cover and base.

Fig. 12 is a schematic diagram showing a connection state of the draft tube and the air flow sensor.

It should be understood that the drawings are not necessarily to scale, presenting a simplified representation of various features illustrative of the basic principles of the utility model. The particular design features disclosed herein (including, for example, particular dimensions, orientations, locations, and shapes) will be determined in part by the particular application and environment in which they are to be used.

In the drawings, like numerals refer to the same or equivalent parts of the utility model throughout the several views of the drawings.

Detailed Description

Reference will now be made in detail to various embodiments of the utility model, examples of which are illustrated in the accompanying drawings and described below. While the utility model will be described in conjunction with the exemplary embodiments, it will be understood that the present description is not intended to limit the utility model to these exemplary embodiments. On the contrary, the utility model is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the utility model as defined by the appended claims.

An engine overhead air intake system for a vehicle provided by an exemplary embodiment of the present utility model is described below with reference to fig. 1 to 12.

FIG. 1 is a schematic illustration of the overall structure of an engine overhead air induction system for a vehicle according to an exemplary embodiment of the present utility model; FIG. 2 is a schematic illustration of an internal configuration of an engine overhead air induction system for a vehicle according to an exemplary embodiment of the present utility model; FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2, illustrating the direction of air flow; FIG. 4 is a schematic cross-sectional view taken along line B-B in FIG. 2, wherein the direction of air flow is shown; FIGS. 5 and 6 are schematic illustrations of a base of an engine overhead air induction system for a vehicle according to an exemplary embodiment of the present utility model; fig. 7 and 8 are schematic views of a first cover of an engine overhead air intake system for a vehicle according to an exemplary embodiment of the present utility model; FIG. 9 is a schematic illustration of a second cover for an engine overhead air induction system of a vehicle according to an exemplary embodiment of the present utility model; fig. 10 is a schematic view of an internal structure of a service cover according to an exemplary embodiment of the present utility model; FIG. 11 is a schematic cross-sectional view taken along line C-C of FIG. 1, illustrating the mating relationship of the service cover with the second cover and base; fig. 12 is a schematic diagram showing a connection state of the draft tube and the air flow sensor.

According to an exemplary embodiment of the present utility model, an engine overhead air induction system for a vehicle may be used for a hybrid electric vehicle (hybrid electric vehicle, HEV).

Exemplary embodiments of the present utility model will be described in detail below with reference to fig. 1 to 12.

First, for convenience of description, a state in which the engine-overhead intake system for a vehicle of the present utility model is mounted on the engine of the vehicle is taken as a state defining a reference direction, for example, an upward direction herein refers to an upward direction of the vehicle, and a downward direction refers to a downward direction of the vehicle.

As shown, an engine overhead air intake system for a vehicle provided by an exemplary embodiment of the present utility model includes: the cartridge comprises a base 100, a first cover 200 and a second cover 300 coupled to the base 100, and a cartridge 400 disposed therein.

As shown in fig. 2 and 5, the edge of the base 100 has an upwardly extending outer wall such that the base 100 forms an inner space. The base 100 has an inner wall, specifically, the inner wall of the base 100 includes a first wall 103 and a second wall 104. The first wall 103 and the second wall 104 extend in an upward direction from the inner bottom surface of the base 100 and divide the inner space of the base 100 into a first space 110, a second space 120, and a third space 130.

As shown in fig. 1, 2 and 5, the first cover 200 is fixedly coupled to the base 100 at positions corresponding to the first space 110 and the third space 130. The inside of the first cover 200 has a partition wall 201 (as shown in fig. 8) corresponding to the first wall 103, so that when the first cover 200 is connected to the base 100, a lower surface of the partition wall 201 can be connected to an upper surface of the first wall 103. At the same time, one of the side edges of the first cover 200 can be coupled to the upper surface of the second wall 104 (as shown in fig. 3), and the remaining side edges of the first cover 200 can be coupled to the outer wall of the base 100, so that the first cover 200 can form the first chamber 140 (as shown in fig. 3) in cooperation with the first space 110 and the third chamber 160 (as shown in fig. 4) in cooperation with the third space 130.

Specifically, the first cover 200 may be fixedly coupled to the base 100 by welding or the like.

As shown in fig. 9, the edge of the second cover 300 has a sidewall extending downward so that the second cover 300 can cooperate with the second space 120 to form the second chamber 150 (as shown in fig. 3 and 4) when the second cover 300 is mounted to the base 100. At the same time, the upper surface of the second cover 300 is flush or substantially flush with the upper surface of the first cover 200, such that the upper surface of the first cover 200 and the upper surface of the second cover 300 together form an upper surface of the hood that covers over the engine to ensure the aesthetic appearance of the hood. Thus, the first cover 200 and the second cover 300 together with the base 100 may form a hood covering over the engine.

As shown in fig. 2 to 4, the filter cartridge 400 is detachably disposed in the second chamber 150 formed by the second cover 300 and the second space 120, and may divide the second chamber 150 into the second lower chamber 151 and the second upper chamber 152. Specifically, the upper edge of the cartridge is provided with mounting tabs 401 to facilitate mounting of the cartridge to the base 100. When the second cover 300 is mounted to the base 100, the downwardly extending sidewall of the edge of the second cover 300 may be pressed against the upper surface of the mounting protrusion 401, so that the filter cartridge 400 can be stably disposed in the second chamber 150 formed by the second cover 300 mated with the second space 120, and partition the second chamber 150 into the second lower chamber 151 and the second upper chamber 152. When the filter cartridge 400 needs to be replaced, the second cover 300 is detached from the base 100, and at this time, the upper surface of the installation protrusion 401 of the filter cartridge 400 loses the pressing force of the side wall of the second cover 300, so that the filter cartridge 400 can be easily detached, and the process of replacing the filter cartridge 400 is simpler and more convenient.

According to an exemplary embodiment of the present utility model, as shown in fig. 2, one side of the first chamber 140 is provided with an air inlet 101, and one side of the third chamber 160 is provided with an air outlet 102.

Further, as shown in fig. 6 and 3, a portion of the second wall 104 of the base 100 between the first chamber 140 and the second lower chamber 151 may be provided to be open such that the first chamber 140 is in fluid communication with the second lower chamber 151. Thus, the air flowing from the air inlet 101 into the first chamber 140 may further flow into the second lower chamber 151.

As shown in fig. 5 and 6, the base 100 is provided with at least one air guide 106 extending a predetermined height in an upward direction from an inner bottom surface of the base 100 at a position corresponding to the second lower chamber 151. The air guide 106 has an arc shape with one end near the first chamber 140 and the other end near the middle of the second lower chamber 151, thereby guiding air flowing from the first chamber 140 into the second lower chamber 151 and reducing negative pressure of the system so that the air flowing effect is better. Specifically, in the exemplary embodiment shown in fig. 5 and 6, the number of the air guide portions 106 is 3, but it should be clear that the number thereof may be adjusted according to circumstances, for example, may be set to any number of 1 to 10. Further, according to the exemplary embodiment of the present utility model, the height of the air guide 106 extending in the upward direction from the inner bottom surface of the base 100 is 10mm, but it should be clear that the height thereof may be adjusted according to circumstances, for example, may be set to any height of 5 to 25 mm.

As shown in fig. 4 and 6, a portion of the second wall 104 of the base 100 between the second upper chamber 152 and the third chamber 160 may be provided with an opening 141, and a side of the sidewall of the second cover 300 corresponding to the second wall 104 may be provided with a flow tuyere 301 (shown in fig. 9) corresponding to the opening 141. When the second cover 300 is mounted to the base 100, the flow tuyere 301 may be connected with the opening 141 such that the second upper chamber 152 is in fluid communication with the third chamber 160. Thus, the air flowing into the second lower chamber 151 flows into the second upper chamber 152 (as indicated by an arrow in fig. 3) after being filtered by the filter cartridge 400, and the air flowing into the second upper chamber 152 may further flow into the third chamber 160. Air flowing into the third chamber 160 may flow out through the air outlet 102 (as indicated by the arrows in fig. 4).

According to an exemplary embodiment of the present utility model, the first chamber 140 is a region where the outside air introduced from the air inlet 101 flows before entering the second chamber 150 where the filter cartridge 400 is located, and the first chamber 140 may function as a buffer tank and an expansion pipe, thereby reducing resistance to air flow and improving NVH performance of the air intake system. The second chamber 150 is a region where the filter element 400 is disposed, and the filter element 400 can remove foreign substances in the air, and the air from which the foreign substances are removed (filtered air) enters the third chamber 160 through the flow air port 301 provided in the sidewall of the second cover 300. The third chamber 160 is a flow area of the air filtered through the filter cartridge 400 before being introduced into the intake portion of the engine, and the filtered air in the third chamber 160 is introduced into the intake portion of the engine through the air outlet 102. The third chamber 160 may also function as a surge tank and expansion tube, thereby reducing resistance to air flow and improving NVH performance of the air intake system.

According to an exemplary embodiment of the present utility model, as shown in fig. 1, an intake duct 601 and a resonance duct 602 may be provided at one side of the intake port 101 of the first chamber 140. Wherein one end of the air intake conduit 601 is in fluid communication with the outside and is configured to introduce outside air to the air intake 101 of the first chamber 140. One end of the resonance conduit 602 is connected to the other end of the intake conduit 601 and the other end of the resonance conduit 602 is connected to the intake port 101 of the first chamber 140. External air is introduced through the intake duct 601 and the resonance duct 602, and flows from the intake port 101 to the inside of the first chamber 140. Specifically, the resonant duct 602 may have a bellows structure for absorbing vibrations caused by the engine, thereby improving NVH performance of the air intake system.

Further, as shown in fig. 1, 2 and 4, a flow guide 701 and an air flow sensor 702 may be provided at one side of the air outlet 102 of the third chamber 160. One end of the flow guide pipe 701 is installed to the air outlet 102 of the third chamber 160 and the other end thereof extends toward the inside of the third chamber 160 to form a horn-like structure to collect and guide the air in the third chamber 160 to flow toward the air outlet 102. An end of the air flow sensor 702 is connected to an end of the draft tube 701 at the air outlet 102, and is used to measure a flow rate of air introduced from the air outlet 102 to an intake portion of the engine.

Further, an air outlet hose 703, a connection pipe 704, and a resonator 705 may be provided at one side of the air outlet 102 of the third chamber 160. An outlet hose 703 is in fluid communication with the outlet 102 of the third chamber 160 through an air flow sensor 702 and a draft tube 701. The outlet hose 703 may have a bellows structure, and the outlet hose 703 is easily and flexibly installed, which may allow air to be introduced into the inlet portion of the engine while allowing the inlet system to be more flexibly disposed in the engine compartment.

One end of the connection pipe 704 is connected to the air outlet hose 703, and the other end thereof is connected to the resonator 705, and the filtered air flowing out from the air outlet 102 of the third chamber 160 is introduced into the air intake portion of the vehicle engine via the flow guide pipe 701, the air flow sensor 702, the air outlet hose 703, the connection pipe 704, and the resonator 705. Among other things, resonator 705 may reduce engine order noise, thereby improving NVH performance of the air intake system.

In an exemplary embodiment of the present utility model, a hydrocarbon trap (not shown in the figures) may be provided in the third chamber 160. In the case where the vehicle is stopped and the engine is turned off, fuel vapor/fuel gas evaporated from the engine may flow into the intake system through the communicating pipe, and therefore, the hydrocarbon trap is provided in the third chamber 160, and the fuel vapor/fuel gas discharged from the engine may be adsorbed and collected. When the engine is started, fuel vapor/fuel gas collected by the hydrocarbon trap is introduced into the engine together with air introduced into the intake system, thereby avoiding environmental pollution and saving fuel. Specifically, the hydrocarbon trap may be fixed to the lower surface of the first cover 200 and located at the upper side of the third chamber 160 by welding.

According to an exemplary embodiment of the present utility model, as shown in fig. 6 and 9, a lower portion of a side wall of the second cover 300 corresponding to one side of the second wall 104 may be provided with at least one connection protrusion 302, and the second wall 104 may be provided with at least one connection barrier 142 extending in a direction of the second cover 300 at a position corresponding to the connection protrusion 302. The connection protrusions 302 can be inserted under the corresponding connection barrier 142 and bring the upper surfaces of the connection protrusions 302 into close contact with the lower surface of the connection barrier 142.

Specifically, in one embodiment of the present utility model, the lower portion of the side wall of the second cover 300 corresponding to one side of the second wall 104 is provided with three connection protrusions 302, and the second wall 104 is provided with three connection baffles 142 extending in the direction of the second cover 300 at positions corresponding to the connection protrusions 302.

According to the above-described exemplary embodiments, in the process of mounting the second cover 300 to the base 100, the connection protrusion 302 may be inserted under the connection barrier 142 such that the upper surface of the connection protrusion 302 is in close contact with the lower surface of the connection barrier 142. At this time, the flow tuyere 301 of the second cover 300 may be connected to the opening 141 of the second wall 104 such that the second upper chamber 152 is in fluid communication with the third chamber 160. Specifically, the flow tuyere 301 of the second cover 300 is of a cylindrical structure extending outwardly, and the opening 141 of the second wall 104 is also of a cylindrical structure and is sized to fit the cylindrical structure of the flow tuyere 301. In the process of mounting the second cover 300 to the base 100, the cylindrical structure of the flow tuyere 301 is inserted into the cylindrical structure of the opening 141. The outer edge of the cylindrical structure of the flow tuyere 301 may also be provided with sealing rubber so that the flow tuyere 301 is more tightly connected to the opening 141.

In one exemplary embodiment of the present utility model, as shown in fig. 9, the other three sides of the sidewall of the second cover 300 may be provided with at least one snap connection 303. Further with reference to fig. 5 and 6, the base 100 may be provided with at least one catch 105 at a position corresponding to the catch connection 303. When the second cover 300 is mounted to the base 100, the clip 105 may be connected to the clip connection 303 so that the second cover 300 is more tightly and conveniently mounted to the base 100. Specifically, in one exemplary embodiment of the present utility model, the number of the snap connection parts 303 is 4, and the number of the corresponding snaps 105 is also 4, but it should be clear that the number of the snap connection parts 303 and the snaps 105 may be adjusted according to circumstances, and may be set to any number of 2 to 10, for example.

According to an exemplary embodiment of the present utility model, as shown in fig. 2 and 5, the first wall 103 may include a plate-shaped wall 131 and a cylindrical wall 132 at a predetermined position of the plate-shaped wall, the cylindrical wall 132 forming a through hole corresponding to the engine oil filling port. Further referring to fig. 7 and 8, the first cover 200 has a maintenance hole 202 corresponding to the through hole. The service hole 202 of the first cover 200 can be aligned with the through hole formed by the cylindrical wall 132 when the first cover 200 is fixedly coupled to the base 100. Specifically, depending on the specific structure of the engine of a different vehicle, the position of the cylindrical wall 132 with respect to the plate-shaped wall 131 may be adjusted such that the through-hole formed by the cylindrical wall 132 and the maintenance hole 202 of the first cover 200 correspond to the engine oil filler port. Thus, when maintenance of the engine is required (for example, adding engine oil or checking an engine oil level gauge), the engine can be maintained only through the through hole and the maintenance hole 202 without disassembling the intake system, thereby facilitating the maintenance of the engine.

The first cover 200 may be further provided with a service cover 203, as shown in fig. 1, 10 and 11, the service cover 203 including: the cap body 230, the sealing member 232, and at least two first locking portions 233.

Further, the upper surface of the maintenance cover body 230 may be provided with a grip 231, and the grip 231 may be gripped by a user to rotate the maintenance cover 203. The user can make the maintenance cover 203 be mounted to the maintenance hole 202 of the first cover 200 or be dismounted from the maintenance hole 202 of the first cover 200 by rotating the maintenance cover 203.

The sealing member 232 may be provided to a sidewall of the service cover body 230 and extend in a circumferential direction of the sidewall for sealing a gap between the service cover 203 and the service hole 202. Specifically, in one exemplary embodiment of the present utility model, as shown in fig. 11, the sealing member 232 is a ring-shaped sealing rubber provided to the sidewall of the service cover body 230 and extending one turn in the circumferential direction of the sidewall. The sealing rubber is provided with a sealing lip overlapped by a predetermined distance so that the sealing effect of the gap between the maintenance cover 203 and the maintenance hole 202 is better.

According to the above-described exemplary embodiment, as shown in fig. 10, at least two first catching portions 233 are configured to protrude in a radially outward direction from a lower portion of the sidewall of the maintenance cap body 230 and extend a first predetermined distance W1 along a circumferential direction of the sidewall, and a catching groove 234 is formed between an upper surface of the first catching portion 233 and a lower surface of the sealing member 232.

Further, as shown in fig. 5 and 11, the upper portion of the cylindrical wall 132 is provided with at least two second catching portions 132a at positions corresponding to the catching grooves 234, the at least two second catching portions 132a protruding from the inner peripheral surface of the cylindrical wall in a radially inward direction and extending a predetermined distance in the circumferential direction of the inner peripheral surface such that a second predetermined distance W2 remains between the adjacent two second catching portions. The second predetermined distance W2 is equal to or greater than the first predetermined distance W1 such that the first latching portion 233 can pass through the second predetermined distance W2 remaining between the adjacent two second latching portions, and when the service cover 203 is rotated by a predetermined angle, the second latching portion 132a can be inserted into a latching groove 234 formed between the upper surface of the first latching portion 233 and the lower surface of the sealing member 232, thereby allowing the service cover 203 to be mounted to the through hole formed by the cylindrical wall 132 and further to the service hole 202 of the first cover 200. Specifically, in the exemplary embodiment of the present utility model, the first latching parts 233 are provided in 2, and the second latching parts 132a are also provided in 2, it should be apparent that the number of the first latching parts 233 may be adjusted according to circumstances, and may be provided in any number of 2 to 10, for example. At this time, the number of the second locking portions 132a also needs to be adjusted correspondingly to the number of the first locking portions 233 so as to ensure that the first locking portions 233 can pass through the second predetermined distance W2 reserved between the adjacent two second locking portions, and when the service cover 203 is rotated by a predetermined angle, the second locking portions 132a can be inserted into the locking grooves 234 formed between the upper surface of the first locking portions 233 and the lower surface of the sealing member 232 so as to allow the service cover 203 to be mounted to the through hole formed by the cylindrical wall 132 and further mounted to the service hole 202 of the first cover 200.

When the engine requires maintenance, a user may grip the grip 231 of the upper surface of the maintenance cap body 230 to rotate the maintenance cap 203 by a predetermined angle so that the second locking portion 132a is separated from the locking groove 234 formed between the upper surface of the first locking portion 233 and the lower surface of the sealing member 232. At this time, the holding portion 231 on the upper surface of the maintenance cover body 230 is held and the maintenance cover is lifted up, so that the first locking portion 233 can be separated from the maintenance cover 203 by a second predetermined distance W2 reserved between two adjacent second locking portions.

Further, according to an exemplary embodiment of the present utility model, as shown in fig. 6, the inner bottom surface of the base 100 may be integrally formed with a rigidity reinforcing rib 107, thereby reinforcing the rigidity of the base 100 and thus preventing the base 100 from being deformed.

For convenience in explanation and accurate definition in the appended claims, the terms "upper", "lower", "inner", "outer", "upper", "lower", "upwardly", "downwardly", "front", "rear", "back", "inner", "outer", "inwardly", "outwardly", "inner", "outer", "outwardly", "forwardly", "rearwardly" are used to describe features of the exemplary embodiments with reference to the positions of such features as displayed in the figures.

The foregoing description of specific exemplary embodiments of the utility model has been presented for the purposes of illustration and description. The foregoing description is not intended to be exhaustive or to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the utility model and its practical application to thereby enable others skilled in the art to make and utilize the utility model in various exemplary embodiments and with various alternatives and modifications. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (13)

1. An engine overhead air induction system for a vehicle, comprising:

a base configured such that an edge thereof has an outer wall extending upward such that the base forms an inner space, the base having an inner wall to divide the inner space into a first space, a second space, and a third space;

a first cover fixedly connected to the base at a position corresponding to the first space and the third space, the first cover having a partition wall inside to form a first chamber in cooperation with the first space and a third chamber in cooperation with the third space;

a second cover detachably attached to the base at a position corresponding to the second space, and forming an engine cover covering over the engine together with the base and the first cover; and

a filter element detachably provided in a second chamber formed by the second cover and the second space, and dividing the second chamber into a second upper chamber and a second lower chamber;

wherein the first chamber is provided with an air inlet on one side and is in fluid communication with the second lower chamber on the other side, and the third chamber is provided with an air outlet on one side and is in fluid communication with the second upper chamber on the other side.

2. The engine overhead air intake system for a vehicle of claim 1, wherein the inner wall of the base comprises:

a first wall located at a position between the first space and the second space to separate the first space from the second space, the first wall extending from an inner bottom surface of the base in an upward direction to a partition wall provided at an inner top surface of the first cover; and

a second wall located at a position between the first space and the second space and the third space to separate the first space and the second space from the third space, the second wall extending from an inner bottom surface of the base in an upward direction to a side edge of the first cover;

wherein a portion of the second wall between the first chamber and the second lower chamber is provided open such that the first chamber is in fluid communication with the second lower chamber; the portion of the second wall between the third chamber and the second upper chamber is provided with an opening.

3. The engine overhead air intake system for a vehicle of claim 2, wherein:

the first wall includes a plate-shaped wall and a cylindrical wall located at a predetermined position of the plate-shaped wall, the cylindrical wall forming a through hole corresponding to an engine oil filler;

the first cover has a service hole corresponding to the through hole and a service cover detachably mounted to the service hole.

4. The engine overhead air intake system for a vehicle of claim 2, wherein:

the edge of the second cover has a side wall extending downward so that the second cover cooperates with the second space to form the second chamber when mounted to the base, and a side of the side wall of the second cover corresponding to the second wall is provided with a flow tuyere corresponding to the opening.

5. The engine overhead air intake system for a vehicle of claim 4, wherein:

the lower part of one side of the side wall of the second cover corresponding to the second wall is provided with at least one connecting protrusion, the second wall is provided with at least one connecting baffle extending towards the direction of the second cover at a position corresponding to the connecting protrusion, and the connecting protrusion can be inserted below the corresponding connecting baffle and enables the upper surface of the connecting protrusion to be in close contact with the lower surface of the connecting baffle;

wherein, when the connection protrusion is inserted under the connection baffle and the connection protrusion upper surface is brought into close contact with the lower surface of the connection baffle, the flow tuyere is connected to the opening such that the second cover is mounted to the base and the second upper chamber is brought into fluid communication with the third chamber.

6. The engine overhead air intake system for a vehicle of claim 1, further comprising:

an air intake duct having one end in fluid communication with the outside; and

and a resonance duct having one end connected to the other end of the air intake duct and the other end connected to the air intake of the first chamber, the resonance duct having a bellows structure.

7. The engine overhead air intake system for a vehicle of claim 1, wherein:

the base is provided with at least one air guide portion extending a predetermined height in an upward direction from an inner bottom surface of the base at a position corresponding to the second lower chamber, the air guide portion being arc-shaped with one end thereof being close to the first chamber and the other end thereof being close to a middle portion of the second lower chamber, thereby guiding air flowing from the first chamber into the second lower chamber.

8. The engine overhead air intake system for a vehicle of claim 1, further comprising:

an air outlet hose having one end connected to an air outlet of the third chamber and having a bellows structure;

a connection pipe having one end connected to the other end of the air outlet hose; and

a resonator having one end connected to the other end of the connection pipe and the other end connected to an intake portion of a vehicle engine.

9. The engine overhead air intake system for a vehicle of claim 8, further comprising:

a flow guide pipe having one end mounted to the air outlet of the third chamber and the other end extending toward the inside of the third chamber to form a horn-like structure to collect and guide air in the third chamber to flow toward the air outlet; and

and one end of the air flow sensor is connected to one end of the flow guide pipe, which is positioned at the air outlet, and the other end of the air flow sensor is connected to the air outlet hose.

10. The engine overhead air intake system for a vehicle of claim 3, wherein the maintenance cap comprises:

the maintenance cover comprises a maintenance cover body, wherein a pinching part is arranged on the upper surface of the maintenance cover body and is pinched by a user to rotate the maintenance cover;

a sealing member provided to a sidewall of the service cover body and extending in a circumferential direction of the sidewall for sealing a gap between the service cover and the service hole; and

at least two first locking parts protruding from a lower portion of the sidewall of the maintenance cap body in a radially outward direction and extending a first predetermined distance along a circumferential direction of the sidewall, a locking groove being formed between an upper surface of the first locking parts and a lower surface of the sealing member.

11. The engine overhead air intake system for a vehicle of claim 10, wherein:

the upper portion of the cylindrical wall is provided with at least two second locking portions protruding from the inner peripheral surface of the cylindrical wall in a radially inward direction and extending a predetermined distance in a circumferential direction of the inner peripheral surface at positions corresponding to the locking grooves such that a second predetermined distance remains between two adjacent second locking portions;

the second predetermined distance is greater than or equal to the first predetermined distance.

12. The engine overhead air intake system for a vehicle of claim 5, wherein:

the other three sides of the side wall of the second cover are provided with at least one buckle connecting part;

the base is provided with at least one buckle at a position corresponding to the buckle connecting part.

13. The engine overhead air induction system for a vehicle of claim 1, further comprising a hydrocarbon trap disposed within said third chamber.