Intake manifold of large-displacement self-suction engine

Abstract

The utility model relates to a large-displacement self-suction engine intake manifold, which comprises a pressure regulating chamber, an intake pipe, a plurality of branch pipes and a connecting plate, the intake pipe is connected onto the pressure regulating chamber, each branch pipe is formed by connecting an intake section, a first regulating section, a second regulating section and an exhaust section, the intake section is fixedly connected onto the pressure regulating chamber, and the second regulating section is fixedly connected onto the connecting plate. The first adjusting section is formed by inserting a first telescopic pipe and a second telescopic pipe, the second adjusting section is formed by inserting a third telescopic pipe and a fourth telescopic pipe, a port of the first telescopic pipe is rotationally connected with a port of the air inlet section, a port of the second telescopic pipe is rotationally connected with a port of the third telescopic pipe, and a port of the fourth telescopic pipe is rotationally connected with a port of the air outlet section. The air outlet section is fixedly connected to the connecting plate, a driving arm is rotationally connected to the first telescopic pipe, a driving motor is arranged on the pressure regulating chamber, and a transmission swing arm with the end rotationally connected with the driving arm is fixedly connected to an output shaft of the driving motor. According to the large-displacement self-absorption engine intake manifold, the length of the branch pipes can be adjusted to achieve adjustment of the air inflow, and arrangement is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts production equipment, in particular to an intake manifold for a large-displacement naturally aspirated engine. Background Art

[0002] The intake manifold is a device that is connected to the intake valve of the engine at one end and to the intake manifold at the other end, and is used to supply air to the engine. Generally, a number of branch pipes are provided according to the number of cylinders of the engine. In order to improve the power of the engine at any speed and improve fuel economy by adjusting the length of the branch pipes to match the intake volume with the engine speed when the engine is running, the prior art, for example, the utility model patent: Continuously Variable Length Intake Manifold (Publication No.: CN201486705U) discloses an intake manifold with adjustable length. However, the intake manifold with the above structure will change the relative positions of the intake end and the outlet end of the intake manifold when adjusting the length of the intake manifold, which brings inconvenience to the connection between the intake manifold, the intake manifold and the engine.

[0003] In view of the above problems, the present invention makes improvements. Utility Model Content

[0004] The utility model provides an intake manifold for a large-displacement naturally aspirated engine, which solves the above-mentioned problems existing in the prior art during use.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] The camshaft is connected to the intake manifold of the engine, and the intake manifold has a first end connected to the intake manifold, a second end connected to the intake manifold, and a third end connected to the intake manifold.

[0007] Preferably, a first connecting sleeve is rotatably provided on the first telescopic tube, and a first connecting portion matching the inner diameter of the air intake section is formed at the end of the first telescopic tube. The first connecting portion is inserted into the port of the air intake section so that the first telescopic tube port and the air intake section port are abutted against each other, and the first connecting sleeve is threadedly connected to the air intake section so that the first telescopic tube port and the air intake section port remain abutted against each other.

[0008] Preferably, a second connecting portion matching the inner diameter of the second telescopic tube is formed on the third telescopic tube port, and the second connecting portion is inserted into the second telescopic tube so that the third telescopic tube port and the second telescopic tube port are abutted against each other.

[0009] Preferably, a second connecting sleeve is rotatably provided on the fourth telescopic tube, and a third connecting portion matching the inner diameter of the air outlet section is formed at the end of the fourth telescopic tube. The third connecting portion is inserted into the port of the air outlet section so that the port of the fourth telescopic tube and the port of the air outlet section are abutted against each other, and the second connecting sleeve is threadedly connected to the air outlet section so that the port of the fourth telescopic tube and the port of the air outlet section remain abutted against each other.

[0010] Preferably, a first sealing ring groove and a second sealing ring groove are respectively provided on the outer wall of the first connecting part and the inner wall of the air inlet section, a first sealing ring is provided between the first sealing ring groove and the second sealing ring groove, a third sealing ring groove and a fourth sealing ring groove are provided on the outer wall of the second connecting part and the inner wall of the second telescopic tube, a second sealing ring is provided between the third sealing ring groove and the fourth sealing ring groove, a fifth sealing ring groove and a sixth sealing ring groove are provided on the outer wall of the third connecting part and the inner wall of the air outlet section, a third sealing ring is provided between the fifth sealing ring groove and the sixth sealing ring groove.

[0011] Preferably, a seventh sealing ring groove and an eighth sealing ring groove are respectively formed on the outer walls of the second telescopic tube and the fourth telescopic tube, and a fourth sealing ring and a fifth sealing ring are respectively provided in the seventh sealing ring groove and the eighth sealing ring groove to abut against the inner walls of the first telescopic tube and the third telescopic tube.

[0012] Preferably, the pressure regulating chamber is composed of a first half chamber and a second half chamber spliced ​​together by a bolt pair, the air intake section is connected to the first half chamber, and the air intake pipe is connected to the second half chamber.

[0013] In summary, the beneficial effects of the present invention are as follows: the driving motor drives the transmission swing arm to drive the driving arm to move, and the driving arm drives the first telescopic tube to swing, and drives the second telescopic tube, the third telescopic tube and the fourth telescopic tube to swing, while driving the second telescopic tube and the third telescopic tube to slide in the first telescopic tube and the fourth telescopic tube respectively, and adjusts the length of the first adjustment section and the second adjustment section, and then adjusts the length of the branch pipe, thereby realizing the adjustment of the engine intake volume, so that the intake volume is matched with the engine speed to improve the engine power and fuel economy, and when adjusting the length of the branch pipe, as with the traditional intake manifold, the positions of the intake end and the outlet end of the branch pipe (that is, the inlet section and the outlet section) will not be changed, which facilitates the arrangement of the intake manifold in the engine system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the branch pipe in the utility model.

[0018] In the figure: 1, surge chamber; 11, first half chamber; 12, second half chamber; 2, air inlet pipe; 3, branch pipe; 31, air inlet section; 311, second sealing ring groove; 32, first adjustment section; 321, first telescopic tube; 3211, first connecting portion; 3212, first sealing ring groove; 322, second telescopic tube; 3221, fourth sealing ring groove; 3222, seventh sealing ring groove; 323, first connecting sleeve; 33, second adjustment section; 331, third telescopic tube; 3311 , second connecting part; 3312, third sealing ring groove; 332, fourth telescopic tube; 3321, third connecting part; 3322, fifth sealing ring groove; 3323, eighth sealing ring groove; 333, second connecting sleeve; 34, air outlet section; 341, sixth sealing ring groove; 35, first sealing ring; 36, second sealing ring; 37, third sealing ring; 38, fourth sealing ring; 39, fifth sealing ring; 4, connecting plate; 5, driving arm; 6, driving motor; 7, transmission swing arm. DETAILED DESCRIPTION

[0019] The following is a combination of the appended examples of the present invention Figure 1-3 , clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] As shown in the figure, an intake manifold for a large-displacement naturally aspirated engine includes a surge chamber 1, an intake pipe 2, several branch pipes 3, and a connecting plate 4. The intake pipe 2 is connected to the surge chamber 1. The branch pipe 3 is composed of an intake section 31, a first regulating section 32, a second regulating section 33, and an outlet section 34. The intake section 31 is fixedly connected to the surge chamber 1. The first regulating section 32 is composed of a first telescopic tube 321 and a second telescopic tube 322 connected together. The second regulating section 33 is composed of a third telescopic tube 331 and a fourth telescopic tube 332. The plug-in structure is that the port of the first telescopic tube 321 is rotatably connected to the port of the air inlet section 31, the port of the second telescopic tube 322 is rotatably connected to the port of the third telescopic tube 331, the port of the fourth telescopic tube 332 is rotatably connected to the port of the air outlet section 34, the air outlet section 34 is fixedly connected to the connecting plate 4, the first telescopic tube 321 is rotatably connected to the driving arm 5, the pressure regulating chamber 1 is provided with a driving motor 6, and the output shaft of the driving motor 6 is fixedly connected to a transmission swing arm 7 whose end is rotatably connected to the driving arm 5.

[0021] Specifically, the structure of the rotational connection between the first telescopic tube 321 and the air intake section 31 is as follows: a first connecting sleeve 323 is rotatably provided on the first telescopic tube 321, and a first connecting portion 3211 matching the inner diameter of the air intake section 31 is formed at the end of the first telescopic tube 321. The first connecting portion 3211 is inserted into the port of the air intake section 31 so that the port of the first telescopic tube 321 and the port of the air intake section 31 are abutted against each other. The first connecting sleeve 323 is screwed onto the air intake section 31 so that the port of the first telescopic tube 321 and the port of the air intake section 31 are kept abutted against each other. The first connecting sleeve 323 is used to limit the axial displacement relative to the first telescopic tube 321 and the air intake section 31, and the first connecting portion 3211 is used to limit the radial displacement relative to the first telescopic tube 321 and the air intake section 31, so that the second telescopic tube 322 can stably rotate circumferentially relative to the air intake section 31.

[0022] Specifically, the second telescopic tube 322 and the third telescopic tube 331 are rotatably connected in structure: a second connecting portion 3311 is formed on the end of the third telescopic tube 331 to match the inner diameter of the second telescopic tube 322. The second connecting portion 3311 is inserted into the second telescopic tube 322 so that the end of the third telescopic tube 331 abuts against the end of the second telescopic tube 322. The second connecting portion 3311 limits the relative radial movement of the second telescopic tube 322 and the third telescopic tube 331, allowing the second telescopic tube 322 and the third telescopic tube 331 to rotate stably relative to each other.

[0023] Specifically, the fourth telescopic tube 332 is rotatably connected to the air outlet section 34 as follows: a second connecting sleeve 333 is rotatably provided on the fourth telescopic tube 332, and a third connecting portion 3321 is formed at the end of the fourth telescopic tube 332 to match the inner diameter of the air outlet section 34. The third connecting portion 3321 is inserted into the port of the air outlet section 34 so that the port of the fourth telescopic tube 332 is abutted against the port of the air outlet section 34. The second connecting sleeve 333 is screwed onto the air outlet section 34 so that the port of the fourth telescopic tube 332 is kept abutted against the port of the air outlet section 34. The first connecting sleeve 323 is used to limit the axial displacement of the fourth telescopic tube 332 relative to the air outlet section 34, and the third connecting portion 3321 is used to limit the radial displacement of the fourth telescopic tube 332 relative to the air outlet section 34, so that the fourth telescopic tube 332 can stably rotate circumferentially relative to the air outlet section 34.

[0024] In the above structure, the first telescopic tube 321 can rotate relative to the air intake section 31, the second telescopic tube 322 can slide relative to the first telescopic tube 321 while the second telescopic tube 322 rotates, the third telescopic tube 331 can swing relative to the second telescopic tube 322, and the fourth telescopic tube 332 can rotate relative to the air outlet section 34 while the third telescopic tube 331 rotates. When using this intake manifold, the surge tank 1 is fixed to the vehicle frame by a bracket to fix the air intake section 31, and the connecting plate 4 is fixed to the engine to fix the air outlet section 34. Since the air intake section 31 and the air outlet section 34 are fixed, when the drive motor 6 drives the transmission swing arm 7 to swing and drives the drive arm 5 to move, the drive arm 5 drives the first telescopic tube 321 to swing in the air intake section 31, and the second telescopic tube 322 drives the third telescopic tube 332 to swing along with the first telescopic tube 321. The telescopic tube 331 swings, causing the fourth telescopic tube 332 to swing relative to the third telescopic tube 331, resulting in horizontal displacement of the rotation centers of the second telescopic tube 322 and the third telescopic tube 331, causing the second telescopic tube 322 and the third telescopic tube 331 to slide within the first telescopic tube 321 and the fourth telescopic tube 332, respectively, thereby changing the length of the first adjustment section 32 and the second adjustment section 33, and thus changing the length of the branch pipe 3, thereby adjusting the length of the branch pipe 3 and further adjusting the engine intake volume, so that the intake volume is matched with the engine speed to improve the engine power and fuel economy. In addition, when the length of the branch pipe 3 is adjusted, the intake manifold of the above structure does not change the positions of the intake and outlet ends of the branch pipe 3 (that is, the inlet section and outlet section 34) as in a conventional intake manifold, thereby facilitating the installation of such an intake manifold in the engine system.

[0025] In addition, in order to enhance the airtightness when the first telescopic tube 321 rotates relative to the air inlet section 31, the second telescopic tube 322 rotates relative to the third telescopic tube 331, and the fourth telescopic tube 332 rotates relative to the air outlet section 34, the outer wall of the first connecting portion 3211 and the inner wall of the air inlet section 31 are respectively provided with a first sealing ring groove 3212 and a second sealing ring groove 311 opposite to each other, a first sealing ring 35 is provided between the first sealing ring groove 3212 and the second sealing ring groove 311, the outer wall of the second connecting portion 3311 and the inner wall of the second telescopic tube 322 are provided with a third sealing ring groove 3312 and a fourth sealing ring groove 3221 opposite to each other, and the third sealing ring groove 3312 and the fourth sealing ring groove 322 are respectively provided with a first sealing ring 35 between the first sealing ring groove 3212 and the second sealing ring groove 311. 1, a second sealing ring 36 is provided between the third connecting portion 3321 and the inner wall of the outlet section 34, and a fifth sealing ring groove 3322 and a sixth sealing ring groove 341 are formed on the outer wall of the third connecting portion 3321 and the inner wall of the outlet section 34, respectively. A third sealing ring 37 is provided between the fifth sealing ring groove 3322 and the sixth sealing ring groove 341. The first sealing ring 35 enhances the airtightness of the first telescopic tube 321 during rotation relative to the intake section 31, the second sealing ring 36 enhances the airtightness of the second telescopic tube 322 and the third telescopic tube 331 during relative rotation, and the third sealing ring 37 enhances the airtightness of the fourth telescopic tube 332 during rotation relative to the outlet section 34, thereby enhancing the sealing performance of the entire intake manifold.

[0026] In addition, in order to enhance the airtightness when the second telescopic tube 322 slides relative to the first telescopic tube 321 and the third telescopic tube 331 slides relative to the fourth telescopic tube 332, a seventh sealing ring groove 3222 and an eighth sealing ring groove 3323 are respectively formed on the outer walls of the second telescopic tube 322 and the fourth telescopic tube 332. The seventh sealing ring groove 3222 and the eighth sealing ring groove 3323 are respectively provided with a fourth sealing ring 38 and a fifth sealing ring 39 that abut against the inner walls of the first telescopic tube 321 and the third telescopic tube 331. The fourth sealing ring 38 enhances the airtightness when the second telescopic tube 322 slides relative to the first telescopic tube 321, and the fifth sealing ring 39 enhances the airtightness when the third telescopic tube 331 slides relative to the fourth telescopic tube 332, thereby enhancing the overall sealing of the intake manifold.

[0027] In addition, in order to facilitate the cleaning and maintenance of the intake manifold after a long period of time, the pressure regulating chamber 1 is composed of a first half chamber 11 and a second half chamber 12 which are assembled by a bolt pair. The air intake section 31 is connected to the first half chamber 11, and the air intake pipe 2 is connected to the second half chamber 12. The first half chamber 11 and the second half chamber 12 connected by the bolt pair can be disassembled, which is convenient for cleaning the inside of the pressure regulating chamber 1. The first telescopic tube 321 and the fourth telescopic tube 332 are connected to the air intake section 31 and the air outlet section 34 respectively through the first connecting sleeve 323 and the second connecting sleeve 333, which also enables the first telescopic tube 321 and the fourth telescopic tube 332 to be disassembled from the air intake section 31 and the air outlet section 34, and then the first telescopic tube 321, the second telescopic tube 322, the third telescopic tube 331 and the fourth telescopic tube 332 are disassembled, thereby facilitating the cleaning and maintenance of the above-mentioned pipelines.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An intake manifold for a large-displacement naturally aspirated engine, comprising a surge chamber (1), an intake pipe (2), a plurality of branch pipes (3) and a connecting plate (4), wherein the intake pipe (2) is connected to the surge chamber (1), and is characterized in that: The branch pipe (3) is composed of an air inlet section (31), a first regulating section (32), a second regulating section (33) and an air outlet section (34), wherein the air inlet section (31) is fixedly connected to the pressure regulating chamber (1), the first regulating section (32) is composed of a first telescopic tube (321) and a second telescopic tube (322) connected in a plug-in manner, and the second regulating section (33) is composed of a third telescopic tube (331) and a fourth telescopic tube (332) connected in a plug-in manner, and the port of the first telescopic tube (321) is rotatably connected to the port of the air inlet section (31). The second telescopic tube (322) is rotatably connected to the third telescopic tube (331) port, the fourth telescopic tube (332) is rotatably connected to the outlet section (34) port, the outlet section (34) is fixedly connected to the connecting plate (4), the first telescopic tube (321) is rotatably connected to a driving arm (5), the pressure regulating chamber (1) is provided with a driving motor (6), and the output shaft of the driving motor (6) is fixedly connected to a transmission swing arm (7) whose end is rotatably connected to the driving arm (5).

2. The large-displacement naturally aspirated engine intake manifold according to claim 1, characterized in that: A first connecting sleeve (323) is rotatably provided on the first telescopic tube (321), and a first connecting portion (3211) matching the inner diameter of the air intake section (31) is formed at the end of the first telescopic tube (321), and the first connecting portion (3211) is inserted into the port of the air intake section (31) so that the port of the first telescopic tube (321) and the port of the air intake section (31) are abutted against each other, and the first connecting sleeve (323) is screwed onto the air intake section (31) so that the port of the first telescopic tube (321) and the port of the air intake section (31) are kept abutted against each other.

3. The large-displacement naturally aspirated engine intake manifold according to claim 2, characterized in that: A second connecting portion (3311) matching the inner diameter of the second telescopic tube (322) is formed on the end of the third telescopic tube (331), and the second connecting portion (3311) is inserted into the second telescopic tube (322) so that the end of the third telescopic tube (331) and the end of the second telescopic tube (322) are abutted against each other.

4. The large-displacement naturally aspirated engine intake manifold according to claim 3, characterized in that: A second connecting sleeve (333) is rotatably provided on the fourth telescopic tube (332), and a third connecting portion (3321) matching the inner diameter of the air outlet section (34) is formed at the end of the fourth telescopic tube (332). The third connecting portion (3321) is inserted into the port of the air outlet section (34) so ​​that the port of the fourth telescopic tube (332) and the port of the air outlet section (34) are abutted against each other. The second connecting sleeve (333) is screwed onto the air outlet section (34) so ​​that the port of the fourth telescopic tube (332) and the port of the air outlet section (34) are kept abutted against each other.

5. The large-displacement naturally aspirated engine intake manifold according to claim 4, characterized in that: A first sealing ring groove (3212) and a second sealing ring groove (311) are respectively provided on the outer wall of the first connecting portion (3211) and the inner wall of the air inlet section (31), and a first sealing ring (35) is provided between the first sealing ring groove (3212) and the second sealing ring groove (311). A third sealing ring groove (3312) and a fourth sealing ring groove (3221) are provided on the outer wall of the second connecting portion (3311) and the inner wall of the second telescopic tube (322), and a second sealing ring (36) is provided between the third sealing ring groove (3312) and the fourth sealing ring groove (3221). A fifth sealing ring groove (3322) and a sixth sealing ring groove (341) are provided on the outer wall of the third connecting portion (3321) and the inner wall of the air outlet section (34), and a third sealing ring (37) is provided between the fifth sealing ring groove (3322) and the sixth sealing ring groove (341).

6. The large-displacement naturally aspirated engine intake manifold according to claim 5, characterized in that: A seventh sealing ring groove (3222) and an eighth sealing ring groove (3323) are respectively provided on the outer walls of the second telescopic tube (322) and the fourth telescopic tube (332), and a fourth sealing ring (38) and a fifth sealing ring (39) are respectively provided in the seventh sealing ring groove (3222) and the eighth sealing ring groove (3323) to abut against the inner walls of the first telescopic tube (321) and the third telescopic tube (331).

7. The large-displacement naturally aspirated engine intake manifold according to claim 6, characterized in that: The pressure regulating chamber (1) is composed of a first half chamber (11) and a second half chamber (12) joined together by a bolt pair, the air intake section (31) is connected to the first half chamber (11), and the air intake pipe (2) is connected to the second half chamber (12).

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