Engine air inlet pipeline

Abstract

The invention relates to the technical field of internal combustion engine air inlet systems, in particular to an engine air inlet pipeline which comprises a pipe body and pipe ends located at the two ends of the pipe body, the middle of the pipe body is of an arc-shaped structure, and the end, close to the pipe ends, of the pipe body is of a linear structure extending outwards. A plurality of transverse strips are arranged on the outer wall of the pipe body in the circumferential direction, a plurality of longitudinal strips distributed in the axial direction are arranged on the outer wall of the pipe body and used for gradually changing the direction of airflow in the pipeline and efficiently conveying the airflow in the pipeline, pressurizing covers are arranged in the two pipe ends in the same direction, each pressurizing cover is of a hopper-shaped structure, and each pressurizing cover is of a hollow structure. A wind speed sensor is arranged in the middle of the pressurizing cover, adjusting parts are arranged at the linear structures of the two ends of the pipe body, and the adjusting parts are of a wave-shaped folding structure. Efficient conveying of airflow of the air inlet pipeline in the limited space of the motorcycle engine is achieved, and gas conveying of the engine in different states is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of the intake system of an internal combustion engine, in particular to an intake pipe applied to a motorcycle engine. BACKGROUND

[0002] The main function of the intake system of a motorcycle engine is to deliver clean, dry, sufficient and stable air to the engine to avoid impurities and large particles of dust in the air entering the engine combustion chamber to cause abnormal wear of the engine. The intake system of an electronic injection motorcycle engine mainly consists of an air cleaner, a throttle valve body (the throttle body contains an oil injector, temperature, pressure and position sensors, an idle step motor, etc.). The linkage of the intake pipe and the air cleaner through the pipeline can process the air of the engine intake system, filter the dust and impurities in the air, and reduce the wear of the engine.

[0003] The current motorcycle engine intake pipe generally adopts a right-angle bending structure, and when the pipeline of this structure delivers gas, the gas inertia acts on the outside of the elbow to form a high-pressure area, and a low-pressure vortex area is formed on the inside, which causes the airflow to separate from the pipe wall, produces turbulent flow, and the local resistance of the right-angle elbow is large. The sudden change of the airflow direction in the right-angle pipe will cause functional loss, reduce the volumetric efficiency of the engine, and affect the use of the engine. Based on the above reasons, it is necessary to design an engine intake pipe with simple structure which can efficiently deliver gas in the intake system. SUMMARY

[0004] The purpose of the present application is to provide an engine intake pipe to solve the problems raised in the background art.

[0005] To achieve the above purpose, the present application provides the following technical scheme: An engine intake pipe, comprising a pipe body and pipe ends located at both ends of the pipe body, the middle part of the pipe body is provided as an arc structure, the end part of the pipe body close to the pipe end is provided as a straight line structure extending outward, the outer wall of the pipe body is provided with a plurality of transverse strips in the circumferential direction, and the outer wall of the pipe body is provided with a plurality of longitudinal strips distributed in the axial direction for gradual change and efficient delivery of the airflow direction in the pipeline.

[0006] As a preferred, a pressurizing cover is provided in the same direction in both of the pipe ends, the pressurizing cover is in a bucket-shaped structure, and a wind speed sensor is arranged in the middle of the pressurizing cover for pressurized transmission and wind speed detection of the airflow in the pipeline.

[0007] As a preferred, an adjusting part is arranged at the straight line structure of each end of the pipe body, the adjusting part is in a wave-shaped folding structure, the adjusting part is made of the same material as the pipe body, and is used for adjusting the arc radius of the pipe body.

[0008] As preferred, the plurality of the transverse strips and longitudinal strips are arranged in a mesh structure on the pipe body, the plurality of the longitudinal strips are integrally injection molded with the pipe body, the transverse strip comprises a positioning ring sleeved outside the pipe body, the toughness of the positioning ring is greater than the toughness of the pipe body, the outer side of the positioning ring is provided with a flexible belt formed by hot pressing with the pipe body, the flexible belt is made of wear-resistant rubber material and is used for stable conveying of airflow.

[0009] As preferred, the central angle of the pipe body is 70-120 degrees, and the inner wall roughness of the pipe body is Ra≤3.2 μm, so as to improve the conveying airflow efficiency.

[0010] As preferred, the outer end of the pipe end is provided with a connecting seat, one side of the connecting seat is annularly provided with a plurality of positioning pieces, the outer side of the positioning piece is sleeved with the same sealing seat, and the sealing seat is connected with the connecting seat, so as to stably install the pipeline.

[0011] As preferred, the positioning piece is made of elastic alloy material, the outer side of the positioning piece is provided with an arc-shaped clamping piece, and the clamping piece abuts against the inner side of the sealing seat, so as to position the pipeline end.

[0012] As preferred, the side of the positioning piece close to the sealing seat is provided with a magnetic pad, the side of the sealing seat away from the wind speed sensor is provided with a through seat, the inner side of the through seat is provided with an electromagnetic ring, the outer side of the electromagnetic ring is connected with a power supply, and the positioning piece is magnetically connected with the sealing seat through the magnetic pad.

[0013] As preferred, the peripheral side of the sealing seat is provided with a plurality of connecting plates, one side of part of the connecting plates is provided with an embedded block, the other side of the remaining connecting plates is provided with a butt block, the outer side of the connecting seat is provided with a plurality of butt plates penetrating the butt blocks, and the middle parts of the plurality of embedded blocks and butt blocks are provided with bolts penetrating the middle parts, so as to stably connect the pipeline with external equipment.

[0014] As preferred, the plurality of the embedded blocks and butt blocks are reversely arranged in an interval mode, and the plurality of the bolts are arranged on the same side.

[0015] Compared with the prior art, the beneficial effects of the present application are: 1. In the present application, the smooth arc structure is replaced by the right-angle elbow structure in the middle part of the pipeline body, so that the gradual change of airflow direction can be realized while maintaining the original installation structure position, so as to adapt to the narrow space of the motorcycle, reduce the conveying airflow resistance, and increase the overall structure of the pipeline by arranging the plurality of transverse strips and longitudinal strips outside the pipeline body, so as to provide favorable conditions for efficient conveying of airflow.

[0016] 2. In the application, the use of the pressure cover on the inside of the pipe end can pressurize the airflow in the input and output pipes, supplement the kinetic energy of the weakened airflow, increase the gas flow rate, realize the rapid delivery of the engine airflow, and detect the real-time airflow speed in the pipe through the wind speed sensor, which can adjust the pipe body radius to adapt to the gas delivery requirements of different engines and can also detect faults in time, increasing the practicality of the pipe. 3. In the application, the use of the pipe end and the sealing seat can facilitate the positioning and connection of the pipe with the installation end, magnetic attraction and bolt installation, increase the connection tightness and stability of the pipe and the connecting structure and the engine, reduce the airflow delivery loss, further improve the gas delivery quality, match the engine intake rhythm, and further improve the gas delivery effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a side view of the pipe in the application; Figure 2 is a perspective view of the pipe in the application; Figure 3 is an exploded view of the structure of the pipe in the application; Figure 4 is a partial structure sectional view of the pipe and the sealing seat in the application; Figure 5 is Figure 4 is an enlarged view of structure A in the application; Figure 6 is a partial structure view of the pipe body in the application; Figure 7 is an exploded view of the structure of the sealing seat and the bolt in the application.

[0018] In the figure: 1, pipe end; 2, pipe body; 3, transverse bar; 4, longitudinal bar; 5, positioning ring; 6, flexible belt; 7, pressure cover; 8, wind speed sensor; 9, connecting seat; 10, positioning piece; 11, clamping piece; 12, magnetic pad; 13, sealing seat; 14, connecting plate; 15, embedded block; 16, butt joint block; 17, butt joint plate; 18, bolt; 19, through seat; 20, electromagnetic ring; 21, adjusting part. DETAILED DESCRIPTION

[0019] The specific embodiments of the application will be described in detail below with reference to the accompanying drawings.

[0020] Please refer to Figures 1-7 , the application provides a technical solution: An engine air intake pipe, because the current engine air intake pipe is mostly right angle structure, the local resistance in the pipe is larger, affecting the airflow delivery, in order to realize the efficient delivery of gas in the limited space of motorcycle, the pipe can be divided into pipe body 2 and pipe end 1 at both ends of pipe body 2; the pipe end 1 is used as the mounting end of the pipe, connected with the engine and the filtering structure, the input and output at both ends of the pipe are used to supply the gas flow in the pipe, by setting the middle part of the pipe body 2 as an arc structure, the arc curvature radius can be dynamically adjusted according to the wind speed, while maintaining the original installation interface position, realizing the gradual change of airflow direction, adapting to the narrow space of motorcycle; then the end of the pipe body 2 close to the pipe end 1 is set as an outwardly extending straight line structure, facilitating the adjustment of the length of the arc structure by the straight line part of the pipe body 2, adjusting the overall bending arc radius of the pipe, making it adapt to different wind speeds of the gas in the pipe, finally, a plurality of transverse strips 3 are arranged on the outer wall of the pipe body 2 in the circumferential direction, enhancing the stability of the pipe diameter, a plurality of longitudinal strips 4 are arranged on the outer wall of the pipe body 2 in the axial direction, reinforcing the length of the pipe, ensuring the stable delivery of airflow in the pipe, improving the gas delivery efficiency of the engine air intake system, without affecting the use of the engine.

[0021] In order to solve the problem of airflow speed reduction in the pipe, as shown in Figure 3 In some embodiments, a pressurizing cover 7 can also be arranged in each of the two pipe ends 1, the distribution state of the two pressurizing covers 7 at the pipe ends 1 is set as the same state, wherein the pressurizing cover 7 is a bucket-shaped structure, one end of the pressurizing cover 7 is attached to the pipe end 1, and the other end is a small hole structure that is inwardly folded, by the folding of the small hole to the large hole, the center of the small hole coincides with the axis of the pipe end 1, and the small hole is arranged in the same direction as the output end, the output gas can be pressurized, the air intake flow is increased, then a wind speed sensor 8 can be arranged in the middle of the pressurizing cover 7 at the output end, using the existing wind speed detection technology of the sensor, the delivery speed of the gas in the pipe is detected in real time, facilitating the adjustment of the arc bending of the pipe body 2 of the pipe according to the wind speed of the delivered gas in the pipe, adapting to the wind speed transmission under different motion states of the engine, increasing its versatility and adaptability.

[0022] Further, in some embodiments, the straight line structure at both ends of the pipe body 2 can also be arranged as an adjusting part 21, the adjusting part 21 is arranged in a wave-shaped folded structure, by pulling or folding the adjusting part 21, the length of the adjusting part 21 is adjusted, the overall length of the pipe body 2 is adjusted, the adjustment of the curvature of the pipe body 2 is facilitated, for the longer folded structure, the folding can be used for folding, the wind resistance of the wave-shaped structure is reduced, and the inner wall of the folded structure remains smooth transition, the roughness Ra≤3.2μm, by pulling or folding the adjusting part 21 to change the overall length of the pipe body 2, the arc radius is adjusted, and different installation positions and bending requirements are adapted. The adjusting part 21 and the pipe body 2 are made of the same material, which is convenient for one-piece molding and saves cost.

[0023] Wherein, it is worth mentioning that in the structural setting of the pipeline, as shown in Figure 1 , 2 and 6, in some embodiments, the plurality of transverse strips 3 and longitudinal strips 4 outside the pipe are arranged in a mesh structure on the pipe body 2, and in the production of the pipeline, the longitudinal strips 4 can be arranged in an integral injection molding structure with the pipe body 2, and then the transverse strips 3 can be arranged on the outside of the pipeline in a way that protects and reinforces the circumferential side of the pipeline, the transverse strips 3 include positioning rings 5 that are sleeved on the outside of the pipe body 2, the positioning rings 5 can be made of polycarbonate, polystyrene or HDPE, etc., the toughness of the positioning rings 5 is greater than that of the pipe body 2, and then flexible belts 6 are arranged on the outside of the positioning rings 5, the flexible belts 6 can be used to arrange the positioning rings 5 on the outside of the pipe body 2 by hot pressing, and the use of wear-resistant rubber material of the flexible belts 6 increases the protection strength of the outside of the pipeline, avoiding tearing of the pipeline, and stable conveying of the airflow.

[0024] Further, when the pipeline is applied to different positions of the engine intake system, the central angle θ of the pipe body 2 can be adjusted to an arc state of 70°-120° according to the position of the connected gas input and output end, facilitating the conveying of different airflow sizes inside the pipeline, for example, appropriately reducing the radius of curvature can enhance the harmonic effect of intake pulsation; in high-speed working conditions of the engine, increasing the radius of curvature can reduce airflow resistance, increase intake flow, and also can reduce airflow resistance and improve airflow conveying efficiency by setting the roughness of the inner wall of the pipe body 2 to Ra≤3.2μm.

[0025] Wherein, it is worth mentioning that in order to ensure the equal transmission of the pipeline gas and reduce the pipeline conveying influence, as shown in Figure 3 and 4 , a connecting seat 9 can be arranged on the outside end of the pipe end 1, a plurality of positioning pieces 10 are arranged in an annular shape on the outside of the connecting seat 9, and then the same sealing seat 13 is sleeved on the outside of the plurality of positioning pieces 10, the sealing seat 13 is used to connect with the equipment installed with the pipeline, through the connection of the sealing seat 13 and the connecting seat 9, the end of the pipeline can be positioned by using the plurality of positioning pieces 10 first, and then the connection of the sealing seat 13 and the connecting seat 9 can realize the connection of the pipeline and the installed equipment, increase the installation efficiency of the pipeline and the connected equipment, and ensure the stable installation of the end of the pipeline.

[0026] And the positioning pieces 10 can be made of elastic alloy materials, such as stainless steel elastic alloy, titanium alloy elastic alloy, etc. The outside of the positioning pieces 10 is provided with arc-shaped clamping pieces 11, when the plurality of positioning pieces 10 are connected with the sealing seat 13, the plurality of positioning pieces 10 can be simultaneously abutted on the inside of the sealing seat 13, and the plurality of positioning pieces 10 are squeezed and supported in the middle of the sealing seat 13 by the elastic deformation of the clamping pieces 11, so as to position the end of the pipeline.

[0027] Further, as Figure 4 and 5 shown, the positioning sheet 10 can also be positioned near the side of the sealing seat 13 provided with a magnetic pad 12, which can use a magnet material, and a through seat 19 is provided on the side of the sealing seat 13 away from the wind speed sensor 8, which can penetrate the inside of the connecting device when the sealing seat 13 is connected to the connecting device, and then an electromagnetic ring 20 can be provided inside the through seat 19, the outside of the electromagnetic ring 20 is connected to a power supply, the electromagnetic ring 20 is controlled by the engine ECU to turn on and off, and is linked to the wind speed sensor 8 to adjust the magnetic attraction strength, and has the characteristics of magnetism after the existing electromagnet is powered on, which facilitates the positioning sheet 10 to be connected to the sealing seat 13 by magnetic attraction, and limits and stabilizes the axial direction between the sealing seat 13 and the connecting seat 9.

[0028] Secondly, as Figure 5 and 7 shown, in some embodiments, a plurality of connecting plates 14 can also be provided on the periphery of the sealing seat 13, an embedded block 15 is provided on one side of part of the connecting plates 14, which is used for positioning and penetrating the sealing seat 13 and the external connecting device, and increases the connection stability of the pipeline and the connecting device, and an abutting block 16 is provided on the other side of the remaining connecting plates 14, a plurality of embedded blocks 15 and abutting blocks 16 are reversely arranged in a spaced manner, so that they can be simultaneously positioned and clamped with the connecting device and the connecting seat 9. At the same time, a plurality of abutting plates 17 are provided on the outside of the connecting seat 9, which penetrate the abutting blocks 16, so as to realize the positioning treatment of the periphery of the connecting seat 9 and avoid the offset of the abutment.

[0029] When the connecting seat 9 is connected with the sealing seat 13 and the installation device, a bolt 18 can be penetrated in the middle of the plurality of embedded blocks 15 and abutting blocks 16, the connecting seat 9 and the sealing seat 13 are connected by penetrating the abutting plates 17 and the abutting blocks 16 with the bolt 18, and the sealing seat 13 and the connecting device are connected by penetrating the embedded blocks 15 and the connecting device with the bolt 18, so as to realize the stable sealing connection of the pipeline and the external device and improve the use effect of the pipeline gas conveying.

[0030] Working principle of the present application: When the intake pipe is used in an engine, first connect one end of the intake pipe to the engine and the other end to the air filter. During installation at both ends of the intake pipe, the sealing seat 13 is positioned using the insert block 15 to hold it in place on the engine or air filter. Then, adjust the length of the pipe body 2 according to the distance and position between the engine and the air filter. Press and align the mating plate 17 and mating block 16 on the connecting seat 9 to position the connecting seat 9. Finally, use bolts 18 to pass through the mating plate 17 and connect it to the mating block 16. Tighten the connecting block 16 to connect the connecting seat 9 to the sealing seat 13. Use bolts 18 to pass through the embedded block 15 and connect it to the engine or air filter to complete the pipeline installation. The gas transported in the pipeline can be pressurized by the pressurization cover 7 and then transmitted. The air velocity in the pipeline is detected in real time by the wind speed sensor 8, which facilitates the adjustment of the pipeline to a suitable arc radius and the gradual change of the gas delivery direction to reduce airflow resistance. The pipeline body 2 adopts a continuous and smooth arc structure in the middle (replacing the traditional right-angle elbow) to achieve efficient airflow delivery in the following ways: Step 1: When transporting airflow, the arc-shaped structure of the pipe (the central angle can be adjusted from 70° to 120°) gradually changes the airflow direction, avoiding the high-pressure zone on the outside and the low-pressure vortex zone on the inside caused by abrupt changes in direction at right-angle bends, reducing airflow separation and turbulence, and lowering local resistance. While maintaining the original installation interface position, the arc-shaped structure is adapted to the narrow space of a motorcycle. At the same time, the arc length can be adjusted by the straight structure at both ends of the pipe body 2. With the setting of the wave-shaped folding adjustment part, the arc radius can be dynamically adjusted (the radius is reduced at low speed to enhance the pulsation effect, and the radius is increased at high speed to reduce resistance), further optimizing the airflow resistance under different working conditions. The transverse strips 3 (including positioning rings 5 ​​and flexible bands 6) and longitudinal strips 4 on the outer wall of the pipe body 2 form a mesh structure, which enhances the structural strength in the pipe diameter and length directions, avoids pipe deformation caused by airflow pressure, ensures the stability of the flow section, and provides structural support for efficient airflow transport.

[0031] Step two involves linking the pressure shroud 7 at pipe end 1 with the sensor to replenish and dynamically adapt the airflow energy. The airflow is pressurized using the funnel-shaped pressure shroud 7 inside pipe end 1, utilizing the "large inlet, small outlet" converging structure and fluid inertia to replenish the kinetic energy lost during transport and directly increase the intake flow rate. The airflow is then detected in real-time by the wind speed sensor 8 in the pressure shroud 7. This data is fed back to the adjustment system, which controls the extension and retraction of the adjustment section 21 of pipe body 2 (changing the radius of curvature) to match the curvature of pipe body 2 with engine operating conditions (such as speed and load). This reduces the radius of curvature at low engine speeds to enhance the intake pulsation harmonic effect, and increases the radius at high speeds to reduce resistance, achieving efficient airflow transport under all operating conditions. Simultaneously, abnormal wind speed monitoring provides timely warnings of malfunctions. Step three, through the multiple positioning and sealing design of pipe end 1 connection structure, reduce the loss of airflow delivery; When installing, the connecting seat 9 of the pipe end 1 is preliminarily positioned through the annular distributed elastic positioning sheet 10, the sealing seat 13 externally sleeved is fixed by magnetic pad 12 and electromagnetic ring 20 in the through seat 19 after electrified, cooperate with the mechanical locking of the embedded block 15, the butt block 16 and the bolt 18 on the connecting plate 14, realize the quick sealing connection of the pipeline and the engine, the filtering structure; Among them, the deformation clamping of the elastic positioning sheet 10, the axial diameter limit of the magnetic pad 12 and the electromagnetic ring 20, the rigid fixation connected by the bolt 18, avoid the pipeline connection end leakage, reduce the pressure loss in the process of airflow delivery, improve the pipeline to the delivery of airflow.

[0032] The above shows and describes the basic principles, main features and advantages of the present application. The present application is not limited by the above examples, the above examples and the description described in the specification is only to illustrate the principle of the present application, without departing from the spirit and scope of the present application, the present application will have various changes and improvements, these changes and improvements all fall into the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An engine intake pipe, comprising a pipe body (2) and pipe ends (1) located at both ends of the pipe body (2), characterized in that: The middle part of the tube body (2) is set as an arc-shaped structure, and the end of the tube body (2) near the tube end (1) is set as an outwardly extending straight structure; The outer wall of the pipe body (2) is provided with multiple transverse strips (3) along the circumferential direction, and the outer wall of the pipe body (2) is provided with multiple longitudinal strips (4) distributed along the axial direction, for the gradual change of airflow direction and efficient transportation in the pipeline.

2. The engine intake pipe according to claim 1, characterized in that: Both pipe ends (1) are provided with pressure hoods (7) in the same direction. The pressure hoods (7) are in the shape of a bucket. A wind speed sensor (8) is provided in the middle of the pressure hoods (7) for pressurizing and transmitting airflow in the pipe and for detecting wind speed.

3. An engine intake pipe according to claim 1, characterized in that: An adjustment part (21) is provided at both ends of the tube body (2) at the straight structure. The adjustment part (21) has a wave-shaped folded structure. The adjustment part (21) is made of the same material as the tube body (2) and is used to adjust the arc radius of the tube body (2).

4. An engine intake pipe according to claim 3, characterized in that: Multiple transverse strips (3) and longitudinal strips (4) are arranged in a mesh structure on the tube body (2). Multiple longitudinal strips (4) are integrally injection molded with the tube body (2). The transverse strips (3) include positioning rings (5) sleeved on the outside of the tube body (2). The toughness of the positioning rings (5) is greater than that of the tube body (2). A flexible band (6) is provided on the outside of the positioning rings (5) and is heat-pressed with the tube body (2). The flexible band (6) is made of wear-resistant rubber material and is used for stable airflow.

5. An engine intake pipe according to claim 4, characterized in that: The central angle θ of the tube body (2) is 70°-120°, and the inner wall roughness of the tube body (2) is Ra≤3.2μm, which improves the efficiency of airflow delivery.

6. An engine intake pipe according to claim 1, characterized in that: A connecting seat (9) is provided on the outer end of the pipe end (1). A plurality of positioning pieces (10) are arranged in a ring on one side of the connecting seat (9). The same sealing seat (13) is sleeved on the outside of the positioning pieces (10), and the sealing seat (13) is connected to the connecting seat (9) for stable installation of the pipe.

7. An engine intake pipe according to claim 6, characterized in that: The positioning piece (10) is made of elastic alloy material. The outer side of the positioning piece (10) is set as a clamping piece (11) with an arc structure and abuts against the inner side of the sealing seat (13) for positioning the end of the pipe.

8. An engine intake pipe according to claim 7, characterized in that: The positioning piece (10) is provided with a magnetic pad (12) on the side near the sealing seat (13), and a through seat (19) is provided on the side of the sealing seat (13) away from the wind speed sensor (8). An electromagnetic ring (20) is provided inside the through seat (19), and a power supply is connected to the outside of the electromagnetic ring (20). The positioning piece (10) is magnetically connected to the sealing seat (13) through the magnetic pad (12).

9. An engine intake pipe according to claim 8, characterized in that: The sealing seat (13) is provided with a plurality of connecting plates (14) around its periphery. Some of the connecting plates (14) are provided with an embedded block (15) on one side, and the remaining connecting plates (14) are provided with a mating block (16) on the other side. The outer side of the connecting seat (9) is provided with a plurality of mating plates (17) that penetrate the mating block (16). Bolts (18) are provided through the middle of the plurality of embedded blocks (15) and mating blocks (16) for stable connection between the pipeline and external equipment.

10. An engine intake pipe according to claim 9, characterized in that: Multiple embedded blocks (15) and mating blocks (16) are arranged in opposite directions at intervals, and multiple bolts (18) are arranged on the same side.

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