Mounting pipe for air flow meter, engine air inlet pipeline and automobile

Abstract

The utility model discloses a mounting pipe for air flow meter, engine air inlet pipeline and automobile, the mounting pipe for air flow meter comprises a first pipe body, a barrel-shaped body and an air outlet pipe, the first pipe body is provided with a mounting seat used for mounting an air flow sensor, the barrel-shaped body is buckled on the part of the first pipe body close to the air outlet end along the axial direction of the first pipe body, and the air outlet pipe is provided with an air inlet. The end, close to the installation base, of the barrel-shaped body is connected with the outer wall of the first pipe body in a sealed mode, a first airflow cavity is formed in the part, except the first pipe body, in the barrel-shaped body, an air outlet of the first airflow cavity is formed in the side wall of the barrel-shaped body, the air outlet pipe is connected with the air outlet, and the pipe wall of the air outlet pipe is in bypass connection with an access pipe used for being connected with a crankcase ventilation pipeline. According to the installation pipe for the air flow meter, a smaller arrangement space is utilized, and the problem that ventilation airflow of a crankcase influences measurement work of an air flow sensor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a mounting pipe for an air flow meter, an engine air intake pipeline and an automobile. Background Art

[0002] In the crankcase ventilation system, the crankcase ventilation pipeline generally introduces the airflow from the crankcase into the engine intake pipeline, and the engine intake pipeline is usually also provided with an air flow meter, such as Figure 1 As shown, a flow meter installation pipe 1 is provided on the pipeline between the air filter (not shown in the figure) and the intake manifold 4, an air flow sensor 2 is installed at the flow meter installation pipe 1, and an access pipe 3 for introducing the ventilation airflow of the crankcase into the engine intake pipeline is connected to the downstream of the air flow sensor 2. In order to reduce the influence of the ventilation airflow of the crankcase on the measurement work of the air flow sensor 2 and ensure the measurement accuracy of the air flow sensor 2, the main solution at present is to set the access position of the ventilation airflow far away from the air flow sensor 2, which requires the size of the intake pipeline to be very long, resulting in a large space required for the layout of the engine on the whole vehicle, which is often not conducive to the matching adaptability of the product. Utility Model Content

[0003] In view of this, one of the purposes of the utility model is to provide a mounting tube for an air flow meter, which uses a smaller layout space to solve the problem of the influence of the ventilation airflow of the crankcase on the measurement of the air flow sensor. Another purpose of the utility model is to provide an engine intake pipe including the above-mentioned mounting tube for an air flow meter, and to provide a car including the above-mentioned engine intake pipe.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An installation pipe for an air flow meter, comprising:

[0006] A first tube body, wherein the first tube body is provided with a mounting seat for mounting an air flow sensor;

[0007] a barrel-shaped body, wherein the barrel-shaped body is buckled on the portion of the first tube body close to the air outlet end along the axial direction of the first tube body, one end of the barrel-shaped body close to the mounting seat is tightly connected to the outer wall of the first tube body, the portion of the barrel-shaped body other than the first tube body forms a first airflow cavity, and the side wall of the barrel-shaped body is provided with an air outlet of the first airflow cavity;

[0008] An air outlet pipe is connected to the air outlet, and an access pipe for connecting to a crankcase ventilation pipeline is connected to the pipe wall of the air outlet pipe.

[0009] Optionally, in the above-mentioned installation tube for the air flow meter, the axis of the outlet pipe and the axis of the first tube body meet the vertical condition.

[0010] Optionally, in the above-mentioned mounting tube for the air flow meter, the air outlet pipe is integrally formed with the barrel-shaped body.

[0011] Optionally, in the above-mentioned mounting tube for the air flow meter, the position of the air outlet end of the first tube body is beyond the position of the center of the air outlet along the direction in which the first tube body extends into the barrel-shaped body.

[0012] Optionally, in the above-mentioned mounting tube for the air flow meter, the length of the portion of the first tube body extending into the barrel-shaped body is not less than half of the length of the first airflow cavity along the axial direction of the first tube body.

[0013] Optionally, in the above-mentioned installation tube for the air flow meter, a rectifying plate with rectifying holes is provided at the air inlet end of the first tube body, and the rectifying plate is fixedly connected to the inner wall of the first tube body.

[0014] Optionally, the above-mentioned air flow meter installation tube further includes:

[0015] The second tube body is sleeved with the part of the first tube body close to the air inlet end, the end of the second tube body close to the mounting seat is tightly connected to the outer wall of the first tube body, a second air flow cavity is formed between the inner wall of the second tube body and the outer wall of the first tube body, an air inlet of the second air flow cavity is formed between the end of the second tube body away from the mounting seat and the outer wall of the first tube body, and the second tube body is provided with an air intake port for connecting to an air compressor.

[0016] Optionally, in the above-mentioned installation tube for the air flow meter, the axis of the air intake port and the axis of the first tube body meet the vertical condition.

[0017] An engine air intake pipeline comprises a mounting pipe for an air flow meter as disclosed in any one of the above items.

[0018] A car comprises the above-mentioned engine air intake pipeline.

[0019] The installation pipe for the air flow meter provided by the utility model has the following beneficial effects:

[0020] The mounting seat of the air flow sensor is arranged on the first tube body, the barrel-shaped body is buckled on the part of the first tube body near the air outlet end along the axial direction of the first tube body, one end of the barrel-shaped body near the mounting seat is tightly connected to the outer wall of the first tube body, the part of the barrel-shaped body except the first tube body forms a first air flow cavity, the side wall of the barrel-shaped body is provided with an air outlet of the first air flow cavity, the outlet pipe connected to the air outlet is connected to an access pipe for connecting to the crankcase ventilation pipeline, the air flow from the crankcase enters the engine intake pipeline along the access pipe, because the first air flow cavity formed by the barrel-shaped body can reduce the interference of the downstream air flow on the measured gas in the first tube body, so the ventilation airflow of the crankcase is avoided from affecting the measurement work of the air flow sensor, which is conducive to ensuring the accuracy of gas measurement and meeting the engine performance requirements. At the same time, the above structure is used to avoid the influence of the ventilation airflow of the crankcase on the measurement work of the air flow sensor, allowing the access point of the ventilation airflow (i.e. the connection between the access pipe and the outlet pipe) to be arranged on the engine intake pipeline at a position close to the air flow sensor, so that the layout of the entire model can be compact. In summary, the installation pipe of the utility model utilizes a smaller layout space and solves the problem of the influence of the ventilation airflow of the crankcase on the measurement work of the air flow sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 is a schematic diagram of an engine intake pipeline of the prior art;

[0023] Figure 2 It is a three-dimensional schematic diagram of a mounting tube for an air flow meter provided in Embodiment 1 of the utility model;

[0024] Figure 3 It is a cross-sectional view of a mounting pipe for an air flow meter provided in Embodiment 1 of the utility model;

[0025] Figure 4 It is a three-dimensional schematic diagram of a mounting pipe for an air flow meter provided in the second embodiment of the utility model;

[0026] Figure 5 It is a cross-sectional view of a mounting tube for an air flow meter provided in Embodiment 2 of the present utility model.

[0027] The markings in the figure are:

[0028] 1. Flow meter installation tube; 2. Air flow sensor; 3. Access tube; 4. Intake manifold; 5. Rectifier; 6. First tube body; 61. Mounting seat; 7. Barrel-shaped body; 8. Exhaust pipe; 9. Second tube body; 91. Air intake port; A. First airflow cavity; B. Second airflow cavity. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 2 and Figure 3 The utility model provides a mounting tube for an air flow meter in the first embodiment, comprising a first tube body 6, a barrel-shaped body 7 and an air outlet pipe 8, wherein the first tube body 6 is provided with a mounting seat 61 for mounting an air flow sensor 2, the barrel-shaped body 7 is buckled on the part of the first tube body 6 near the air outlet end along the axial direction of the first tube body 6, the part of the first tube body 6 buckled by the barrel-shaped body 7 is located between the air outlet end of the first tube body 6 and the mounting seat 61, one end of the barrel-shaped body 7 near the mounting seat 61 is tightly connected to the outer wall of the first tube body 6, and the part of the barrel-shaped body 7 other than the first tube body 6 forms a first air flow cavity A, that is, the first air flow cavity A connected to the first tube body 6 is formed between the inner wall of the barrel-shaped body 7 and the outer wall of the first tube body 6. The side wall of the barrel-shaped body 7 is provided with an air outlet of the first air flow cavity A, the air outlet pipe 8 is connected to the air outlet of the first air flow cavity A, and the pipe wall of the air outlet pipe 8 is connected with an access pipe 3 for connecting to the crankcase ventilation pipeline.

[0031] It should be noted that the side wall of the barrel-shaped body 7 refers to the portion other than the bottom of the barrel-shaped body 7 (i.e., the portion directly facing the gas outlet end of the first tube 6). Figure 5 As shown by the arrow in , the airflow flows out of the first tube body 6 and enters the first airflow cavity A. Since the bottom of the barrel-shaped body 7 is opposite to the air outlet end of the first tube body 6, the airflow direction changes and finally flows into the air outlet pipe 8 from the air outlet located on the side wall of the barrel-shaped body 7.

[0032] like Figure 3As shown, when in use, the end of the outlet pipe 8 away from the first airflow cavity A and the air inlet end of the first tube body 6 are respectively connected to other parts of the engine's air inlet pipeline, so that the air flow meter is connected to the air inlet pipeline as a part of the engine's air inlet pipeline using the mounting pipe. The access pipe 3 is connected to the outlet pipe 8 and is used to connect to the crankcase ventilation pipeline. The airflow from the crankcase enters the engine's air inlet pipeline along the access pipe 3. By setting the barrel 7 to form the first airflow cavity A, the interference of the downstream airflow on the measured gas in the first tube body 6 can be reduced, thereby avoiding the influence of the crankcase ventilation airflow on the measurement work of the air flow sensor 2, which is conducive to ensuring the accuracy of gas measurement and meeting the engine performance requirements. At the same time, the above structure is used to avoid the influence of the crankcase ventilation airflow on the measurement work of the air flow sensor 2, allowing the access point of the ventilation airflow (i.e., the connection between the access pipe 3 and the outlet pipe 8) to be arranged at a position closer to the air flow sensor 2, so that the layout of the entire model can be compact. In summary, the installation pipe of the utility model utilizes a smaller layout space and solves the problem of the influence of the ventilation airflow of the crankcase on the measurement work of the air flow sensor.

[0033] In a preferred embodiment, the axis of the air outlet pipe 8 and the axis of the first tube body 6 meet the vertical condition, that is, the axis of the air outlet pipe 8 and the axis of the first tube body 6 are perpendicular or nearly perpendicular to each other. In other embodiments, the axis of the air outlet pipe 8 can also be set to form other angles relative to the axis of the first tube body 6, for example, the air outlet pipe 8 is inclined toward the air inlet end of the first tube body 6 and forms an angle of 70° to 80° with the axis of the first tube body 6, for example, the air outlet pipe 8 is inclined 15° toward the air inlet end of the first tube body 6 and forms an angle of 75° with the axis of the first tube body 6.

[0034] like Figure 3 As shown, in this embodiment, the axis of the access pipe 3 and the axis of the outlet pipe 8 meet the vertical condition, that is, the axis of the access pipe 3 and the axis of the outlet pipe 8 are perpendicular or nearly perpendicular to each other. In other embodiments, the axis of the access pipe 3 can also be set to form other angles relative to the axis of the outlet pipe 8, for example, the access pipe 3 is inclined toward the barrel 7 and forms an angle of 70° to 80° with the axis of the outlet pipe 8, for example, the access pipe 3 is inclined toward the barrel 7 by 15° and forms an angle of 75° with the axis of the outlet pipe 8.

[0035] like Figure 3As shown, in this embodiment, the air outlet pipe 8 is integrally formed with the barrel-shaped body 7. In other embodiments, the air outlet pipe 8 can also be connected to the barrel-shaped body 7 by welding. In order to achieve a closed connection between the end of the barrel-shaped body 7 close to the mounting seat 61 and the outer wall of the first tube body 6, a funnel-shaped first connector can be provided at the connection between the barrel-shaped body 7 and the first tube body 6. The larger end of the first connector is fixedly connected to the end of the barrel-shaped body 7 close to the mounting seat 61, and the smaller end is fixedly connected to the outer wall of the first tube body 6. After the airflow comes out from the air outlet end of the first tube body 6, it enters the first airflow cavity A. When the airflow reaches the funnel-shaped first connector, the local space of the first airflow cavity A is narrowed, and an extrusion effect is formed, which is conducive to the airflow to flow out of the air outlet more stably. Of course, in other embodiments, the first connector can also be set to other shapes, such as a plate-like structure that meets the vertical condition with the axis of the first tube body 6.

[0036] like Figure 3 As shown, in order to achieve better anti-interference effect and minimize the interference of downstream airflow on the measured gas in the first tube body 6, in this embodiment, the position of the air outlet end of the first tube body 6 is beyond the position of the center of the air outlet along the direction in which the first tube body 6 extends into the barrel-shaped body 7. Specifically, in order to take into account both good anti-interference effect and compact structural layout, the length of the part of the first tube body 6 extending into the barrel-shaped body 7 is generally not less than half of the length of the first airflow cavity A along the axial direction of the first tube body 6. On this basis, the position of the air outlet end of the first tube body 6 is preferably set to be flush with the side of the air outlet close to the bottom of the barrel-shaped body 7 (i.e., the side away from the mounting seat 61).

[0037] like Figure 2 As shown, in order to improve the stability of the airflow in the first tube body 6 and further ensure the accuracy of gas measurement, the air inlet end of the first tube body 6 is generally provided with a rectifying plate 5 with rectifying holes, and the rectifying plate 5 is fixedly connected to the inner wall of the first tube body 6. Specifically, the rectifying holes can be set to be circular. In addition, the rectifying plate 5 can be replaced by a grid, which also realizes the rectifying effect on the airflow to improve the stability of the airflow in the first tube body 6.

[0038] See also Figure 4 and Figure 5On the basis of the first embodiment, the second embodiment of the utility model provides a mounting tube for an air flow meter. The difference between the second embodiment and the first embodiment is that the mounting tube of the second embodiment also includes a second tube body 9, and the second tube body 9 is sleeved with the part of the first tube body 6 close to the air inlet end. The part of the first tube body 6 sleeved by the second tube body 9 is located between the air inlet end of the first tube body 6 and the mounting seat 61. One end of the second tube body 9 close to the mounting seat 61 is tightly connected to the outer wall of the first tube body 6, and a second airflow cavity B is formed between the inner wall of the second tube body 9 and the outer wall of the first tube body 6. An air inlet of the second airflow cavity B is formed between one end of the second tube body 9 away from the mounting seat 61 and the outer wall of the first tube body 6. The second tube body 9 is provided with an air intake port 91 for connecting to an air compressor.

[0039] When in use, the end of the second tube body 9 away from the mounting seat 61 and the end of the outlet pipe 8 away from the first airflow cavity A are respectively connected to other parts of the engine's intake pipe, so that the air flow meter mounting pipe is connected to the intake pipe as a part of the engine's intake pipe. Figure 5 As shown by the arrows in , after air intake, the airflow is divided into two parts, one part is measured by the air flow sensor 2 through the inside of the first tube body 6, and the other part goes to the air compressor through the second airflow cavity B and the air intake port 91. Since the measured gas and the gas taken by the air compressor are separated by the part of the first tube body 6 located in the second tube body 9, the air intake of the air compressor is prevented from interfering with the measurement work of the air flow sensor 2, which is conducive to ensuring the accuracy of gas measurement and meeting the performance requirements of the engine. Moreover, the above structure is used to avoid the influence of the air intake of the air compressor on the measurement work of the air flow sensor 2, allowing the air intake port 91 of the air compressor to be arranged at a position closer to the air flow sensor 2, so that the layout of the entire model can be compact, meet the layout requirements of various models, and improve the adaptability of the product.

[0040] like Figure 5 As shown, in a preferred embodiment, the axis of the air inlet 91 and the axis of the first tube body 6 meet the vertical condition, that is, the axis of the air inlet 91 and the axis of the first tube body 6 are perpendicular or nearly perpendicular to each other, and the airflow flows from the second airflow cavity B into the air inlet 91 along an angle of approximately 90°, which can better reduce the disturbance caused by the air intake of the air compressor. In other embodiments, the axis of the air inlet 91 can also be set to form other angles relative to the axis of the first tube body 6, for example, the air inlet 91 is inclined toward the air outlet end of the first tube body 6 and forms an angle of 70° to 80° with the axis of the first tube body 6, for example, the air inlet 91 is inclined 15° toward the air outlet end of the first tube body 6 and forms an angle of 75° with the axis of the first tube body 6.

[0041] In a preferred embodiment, one end of the second tube body 9 close to the mounting seat 61 is tightly connected to the outer wall of the first tube body 6 through a funnel-shaped second connector, such as Figure 5As shown, the larger end of the second connector is fixedly connected to one end of the second tube 9 close to the mounting seat 61, and the smaller end is fixedly connected to the outer wall of the first tube 6. The funnel-shaped second connector forms the bottom of the second airflow cavity B. When the airflow reaches the bottom of the second airflow cavity B, the funnel-shaped structure of the second connector forms an extrusion effect, which is conducive to a more stable airflow out of the air intake port 91. Of course, in other embodiments, the second connector can also be set to other shapes, such as a plate-shaped structure that meets the vertical condition with the axis of the first tube 6.

[0042] The utility model also provides an engine intake pipe, which includes the air flow meter installation pipe disclosed in the above embodiment. Since the air flow meter installation pipe disclosed in the above embodiment has the above technical effects, the engine intake pipe having the air flow meter installation pipe also has the above technical effects, which will not be described in detail herein.

[0043] The utility model also provides a car, the car comprises the above engine intake pipe. Similarly, the technical effect of the car with the engine intake pipe can be seen from the above introduction of the air flow meter installation pipe, which will not be repeated here.

[0044] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0045] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mounting pipe for an air flow meter, characterized in that: include: A first tube body (6), the first tube body (6) being provided with a mounting seat (61) for mounting an air flow sensor (2); a barrel-shaped body (7), the barrel-shaped body (7) being buckled on a portion of the first tube (6) close to the air outlet end along the axial direction of the first tube (6), one end of the barrel-shaped body (7) close to the mounting seat (61) being tightly connected to the outer wall of the first tube (6), the portion of the barrel-shaped body (7) other than the first tube (6) forming a first airflow cavity (A), and the side wall of the barrel-shaped body (7) being provided with an air outlet of the first airflow cavity (A); An air outlet pipe (8) is connected to the air outlet, and an access pipe (3) for connecting to a crankcase ventilation pipeline is connected to the pipe wall of the air outlet pipe (8).

2. The air flow meter mounting pipe according to claim 1, characterized in that: The axis of the air outlet pipe (8) and the axis of the first tube body (6) meet the vertical condition.

3. The air flow meter mounting pipe according to claim 1, characterized in that: The air outlet pipe (8) and the barrel-shaped body (7) are integrally formed.

4. The air flow meter mounting pipe according to claim 1, characterized in that: The position of the air outlet end of the first tube (6) is beyond the position of the center of the air outlet along the direction in which the first tube (6) extends into the barrel-shaped body (7).

5. The air flow meter mounting pipe according to claim 1, characterized in that: The length of the portion of the first tube (6) extending into the barrel-shaped body (7) is not less than half the length of the first airflow cavity (A) along the axial direction of the first tube (6).

6. The air flow meter mounting pipe according to claim 1, characterized in that: A rectifying plate (5) with rectifying holes is provided at the air inlet end of the first tube body (6), and the rectifying plate (5) is fixedly connected to the inner wall of the first tube body (6).

7. The air flow meter mounting pipe according to any one of claims 2 to 6, characterized in that: Also includes: The second tube body (9) is sleeved with a portion of the first tube body (6) close to the air inlet end; one end of the second tube body (9) close to the mounting seat (61) is tightly connected to the outer wall of the first tube body (6); a second air flow cavity (B) is formed between the inner wall of the second tube body (9) and the outer wall of the first tube body (6); an air inlet of the second air flow cavity (B) is formed between one end of the second tube body (9) away from the mounting seat (61) and the outer wall of the first tube body (6); the second tube body (9) is provided with an air intake port (21) for connecting to an air compressor.

8. The air flow meter mounting pipe according to claim 7, characterized in that: The axis of the air intake port (21) and the axis of the first tube body (6) meet the vertical condition.

9. An engine air intake pipeline, characterized in that: It comprises a mounting pipe for an air flow meter as described in any one of claims 1 to 8.

10. An automobile, characterized in that: Comprising the engine intake line as claimed in claim 9.

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