JP5508989B2 - Method for changing the volume of an intake manifold in an intake device - Google Patents

Description

  The present invention relates to an intake device, and more particularly to an intake device in which a member forming an intake air collecting chamber and a branch pipe are integrally formed.

  Conventionally, it is possible to change the engine characteristics by using the engine body in common and replacing the intake device, and further dividing the intake device into a plurality of parts in order to reduce the replacement part, so that only the necessary parts are replaced There was an engine (see, for example, Patent Document 1).

JP 2004-162710 A

  In Patent Document 1, the base portion of the intake device is used as it is without changing, and the geometric shape of the replaceable intake pipe portion is changed, so that different intake pipe lengths or intake pipe volumes suitable for different engines can be obtained. An air intake device is said to be obtained.

  However, the box body forming the intake air collecting chamber and the lower intake pipe portion are integrally formed, and the upper lid shell body and the upper intake pipe portion are integrally formed to form a lid. This is a structure in which a member composed of a shell and an upper intake pipe portion is changed. In addition, since the position of the fixed joining portion that is the joint portion of both members is fixed, the size of the box is limited by the fixed joining portion, and in order to greatly increase the volume, the box and the lower side It is necessary to change the size of the integrated member with the intake pipe part or the integrated member with the lid shell and the upper intake pipe part, and the volume can be changed easily (the shape of the intake air collecting chamber can be changed). There is a problem that you can not. Moreover, there exists a problem that intensity | strength falls when an external shape becomes large by enlargement.

In order to solve such problems and make it possible to easily cope with the shape change of the intake air collecting chamber of the intake device and realize an increase in strength, in the present invention, a plurality of parallelly provided plural Intake device (1) in which an intake air collecting chamber (2) is constituted by a base member (6) formed integrally with the branch pipe (3) and cover members (7a, 7b) coupled to the base member And a plurality of transverse ribs (11d, 12a) extending so that the base member traverses at different positions of the plurality of branch pipes, and a plurality of transverse ribs A plurality of coupling walls (11, 12) each including any one and defining different annular mating surfaces, wherein the cover member is coupled to any one of the plurality of coupling walls Multiple intersections of different sizes Is one replacement cover member selected from a use cover member, by combining one replacement cover member said selected on the base member, and to alter the volume of the intake collection chamber.

  According to this, an annular mating surface is formed by the coupling wall including any one of the plurality of transverse ribs, and the cover member having a shape corresponding to the coupling wall that defines the annular mating surface is coupled to cover the cover. The inside surrounded by the member, the base member, and the coupling wall is formed as an intake air collecting chamber, and it is easy to make the intake air collecting chambers of different shapes by connecting the cover members with shapes corresponding to other connecting walls including other transverse ribs. In addition, since each of the other transverse ribs functions as a reinforcing wall of the base member, the strength of the intake device having a structure capable of selectively forming intake manifolds having different shapes can be increased. For securing, it is possible to prevent the intake device from becoming large.

  In particular, a part (11b) of the intake air introduction wall for introducing intake air into the intake air collecting chamber may be formed by a part of the coupling wall. According to this, since the intake introduction wall for introducing the intake air into the intake air collecting chamber is formed by a part of the coupling wall, the intake air can smoothly flow from the intake air collecting chamber to the branch pipe, Since it is not necessary to separately form the intake introduction path, it is possible to promote the suppression of the increase in size of the intake device.

  In addition, the coupling wall connects two ends of the plurality of crossing ribs that are connected to both ends of the part of the intake introduction wall, and the ends of the two crossing ribs that are opposite to the part of the intake introduction wall. It has a wall (12b), and the two transverse ribs, a part of the intake introduction wall, and the connecting wall are preferably arranged in a substantially rectangular shape. According to this, since the strength of the base member is increased by the substantially rectangular shape formed by a part of the coupling wall, it is not necessary to separately provide a reinforcing member for increasing the strength of the base member, so that the size of the intake device is increased. Can be suppressed.

The plurality of branch pipes are disposed at an interval in doctor each other, wherein the base member may have a closing wall for closing (16) the spacing between adjacent groups of said plurality of branch pipes . According to this, a space serving as an intake air collecting chamber can be defined between the blocking wall and the cover member, and when a plurality of branch pipes are arranged at intervals, the cover is configured to close the interval. Since it is not necessary to form a member, the shape of the cover member can be simplified, and the branch pipes are coupled via the blocking wall, so that the blocking wall functions as a reinforcing wall, and the members constituting the intake air collecting chamber Since the strength can be increased by a part, it is not necessary to separately provide a reinforcing member for increasing the strength, so that it is possible to promote the suppression of the enlargement of the intake device.

  Further, the plurality of branch pipes have a curved shape that protrudes outward of the engine, the base member forms a concave wall of the plurality of branch pipes, and the concave side of the plurality of branch pipes The intake air collecting chamber may be defined by a wall and the cover member. According to this, the intake air collecting chamber can be suitably configured by using the concave space in the curved shape of the plurality of branch pipes, and an increase in the size of the intake device can be avoided by the curved shape of the branch pipes.

  Further, the cover member may be one selected from a plurality of replacement cover members formed in different sizes so as to change the volume of the intake air collecting chamber. According to this, the volume of the intake air collecting chamber can be easily changed by changing the cover member to one having a different shape, and a plurality of coupling walls provided in advance in the base member can be selected. An increase in the size of the intake device can be avoided by changing the cover member to change.

  The cover member (21) is sized to receive one of the plurality of transverse ribs (11d) therein and divides a space defined by the cover member and the base member. A partition wall (21b) coupled to the transverse rib received in the interior, and a communication pipe (24) formed in the partition to communicate the divided spaces of the space, One of the divided spaces may be configured as the intake air collecting chamber (22), and the other divided space may be configured as the resonance chamber (23). According to this, the space defined between the base member and the cover member is divided into a simple shape in which the partition member and the communication path are provided in the cover member, and one of them is an intake air collecting chamber and the other is a resonance chamber. Therefore, there is no need to change the shape of the base member or provide another member to provide the resonance chamber, and the resonance chamber can be selectively provided without increasing the size of the intake device. A simple intake device can be configured.

  As described above, according to the present invention, since the plurality of coupling walls to which the cover member is coupled are provided, it is possible to easily form the intake collecting chambers having different shapes, and the other transverse ribs respectively reinforce the base member. Since it functions as a wall, the strength of the intake device having a structure capable of selectively forming intake manifold chambers having different shapes can be increased. Therefore, it is possible to prevent the intake device from becoming large in order to ensure the strength.

It is a principal part side view which shows an intake device. It is the front view seen from the arrow II line of FIG. It is a disassembled assembly perspective view of an intake device. It is a front view which shows a base member. It is the sectional side view seen along the arrow VV line of FIG. It is a figure similar to FIG. 2 which shows the state which couple | bonded the 2nd cover member. It is the sectional side view seen along the VII-VII line of FIG. It is a figure similar to FIG. 2 which shows the state which couple | bonded the 3rd cover member. It is a figure corresponding to Drawing 8 before combining the 3rd cover member. It is the sectional side view seen along the arrow XX of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of an essential part showing an intake device 1 for an internal combustion engine to which the present invention is applied, FIG. 2 is a front view as seen from the line II of FIG. 1, and FIG. 3 is an exploded view of the intake device. It is a perspective view.

  The intake device 1 is formed of a synthetic resin material, and forms an intake air collection chamber 2 into which fresh air from an air cleaner (not shown) enters, and a plurality (four in the illustrated example) that communicate the intake air collection chamber 2 with each cylinder. 1 and is fixed to the engine body 4 by a flange 5 formed corresponding to the intake port of the engine body 4 of each branch pipe 3 as shown in FIG. As shown in FIG. 3, the intake device 1 includes the base member 6 constituting a part of the intake manifold 2 and a part of the branch pipe 3, and the intake member 2 together with the base member 6. The dome-shaped first cover member 7a and the branch pipe half member 8 constituting the branch pipe 3 together with the base member 6 have a three-part structure, and the members 6, 7a, 8 are connected to each other at their mating surfaces. Welded and integrated.

  The plurality of branch pipes 3 are formed in a C-shaped curved shape that protrudes outward from the engine body 4 as shown in FIG. 3 when the intake device 1 is assembled to the engine body 4, and They are arranged in parallel. A space is formed between the plurality of branch pipes 3 and the engine body 4 on the concave side, and the intake air collecting chamber 2 is arranged in the space.

  The base member 6 is integrally provided with a cylindrical intake intake portion 9 that communicates with the intake air collecting chamber 2 and takes in fresh air from the air cleaner. The intake air intake portion 9 is provided so as to extend obliquely at one end side in the arrangement direction of the plurality of branch pipes 3 and below the flange 5.

  As shown in FIG. 4, annular first coupling walls 11 and second coupling walls 12 are provided on the concave side of the plurality of branch pipes 3 of the base member 6. The first coupling wall 11 having a small annular shape is composed of an end wall 11a in the vicinity of the intake intake portion 9 and a pair of intake introduction walls 11b, which are continuous from both ends of the end wall 11a and extend obliquely below the flange 5. 11c, a transverse rib 11d extending from one intake introduction wall 11b located inside the base member 6 and extending in a direction crossing each intermediate portion of the plurality of branch pipes 3, and part of the outer shape of the base member 6 A plurality of branches on the side opposite to the transverse ribs 11d across the openings 3a that are continuous from the other intake introduction wall 11c extending so as to form an opening and open to the intake air collecting chamber 2 of the plurality of branch pipes 3. The tube 3 is formed in a continuous annular shape by a bottom wall 11e extending in the direction in which the tubes 3 are arranged and a side wall 11f connecting the end portions of the transverse rib 11d and the bottom wall 11e. An intake passage 9a of the intake intake portion 9 is opened between the pair of intake introduction walls 11b and 11c of the annular first coupling wall 11, and is defined by a transverse rib 11d, a bottom wall 11e, and a side wall 11f. The intake air collecting chamber 2 communicates with the intake air passage 9a.

  In addition, the second coupling wall 12 having a large annular shape is continuous from the end wall 11a, branches off from one of the intake introduction walls 11b, and crosses downstream portions of the plurality of branch pipes 3 (near the flange 5). The extending transverse rib 12a, the side wall 12b as a connecting wall connecting the end opposite to the end wall 11a of the transverse rib 12a and the transverse rib 11d, and a part of the transverse rib 11d (side wall 12b ), The side wall 11f, the bottom wall 11e, the other intake introduction wall 11c, and the end wall 11a. The second coupling wall 12 has a size obtained by adding a portion formed by the transverse rib 12a, the side walls 11f and 12b, and a part of the transverse rib 11d to the annular portion formed by the first coupling wall 11, and has a large volume of the intake assembly. Chamber 2 is configured.

  As shown in FIGS. 2, 3, and 5, the first cover member 7 a constituting the intake air collecting chamber 2 having a small volume is formed in an outer shape corresponding to the annular shape of the first coupling wall 11. It forms in the shape of a dome which covers the inside with the coupling wall 11. The base member 6 and the first cover member 7a are integrated with each other by welding the annular mating surface 14 formed of a band-like protruding end surface of the first coupling wall 11 and the annular mating surface 15 by the edge of the first cover member 7a. It becomes.

  Further, although the plurality of branch pipes 3 are disposed apart from each other, the respective blocking walls 16 that block the portions that become the respective gaps between the branch pipes 3 are integrally formed. The blocking wall 16 is provided over a range including at least a range corresponding to the first cover member 7a. Thereby, it is not necessary to form the part which becomes the wall which covers the intake branch pipe 3 side of the intake manifold 2 by the 1st cover member 7a, and can simplify the shape of the 1st cover member 7a. Further, since each branch pipe 3 is coupled via the blocking wall 16, the blocking wall 16 functions as a reinforcing wall, and it is not necessary to provide any reinforcing member for increasing the strength, so the number of parts is reduced. In addition, an increase in size of the intake device 1 can be suppressed.

  As shown in FIGS. 6 and 7, the second cover member 7 b constituting the large-volume intake air collecting chamber 2 is formed in an outer shape corresponding to the annular shape of the second coupling wall 12, and together with the second coupling wall 12 It is formed in a dome shape that covers the inside. An annular mating surface 17 formed of a band-like projecting end surface of the second coupling wall 12 shares a part of the annular mating surface 14 of the first coupling wall 11 and is composed of projecting end surfaces of the transverse rib 12a and the side wall 12b. . The annular mating surface 17 and the annular mating surface 17 by the edge of the second cover member 7a are welded together, and the base member 6 and the second cover member 7b are integrally coupled. Moreover, the blocking wall 16 is provided over the whole range corresponding to the 2nd cover member 7b, and there can exist an effect similar to the above.

  In this way, the first cover member 7a and the second cover member 7b are used as replacement cover members, and the first cover member 7a or the second cover member 7b is selectively used in accordance with the engine characteristics. Since the different sizes of the intake air collecting chamber 2 can be obtained with a simple structure of welding and joining to each other, a highly versatile intake device that can accommodate different intake air collecting chambers can be provided at low cost.

  Further, since the transverse ribs 11d and 12a are provided in the recesses of the plurality of branch pipes 3, since the protrusion to the outside of the intake device 1 due to the change of the cover members 7a and 7b does not occur, the intake device 1 An increase in size is avoided. Further, according to the shape of the illustrated example, the transverse ribs 11d and 12a are provided substantially in parallel with each other, one end of each is connected by the intake inlet wall 11b, and the other end is connected by the side wall 12b. Thus, since a substantially rectangular reinforcing wall is formed by them, the rigidity of the intake device 1 is increased.

  When the smaller first cover member 7a is provided, the transverse rib 12a and the side wall 12b of the second coupling wall 12 are not involved in the coupling, but the transverse rib 12a extends across the plurality of branch pipes 3. Since it is connected to the branch pipe 3 at a portion that exists and crosses, it can function as a reinforcement of the intake device 1. In addition, the cross rib 12a is also couple | bonded with the obstruction | occlusion wall 16, and the effect as reinforcement is still higher. On the other hand, in the case where the large second cover member 7b is provided, the transverse rib 11d that will be located inside the second cover member 7b can not only function as a reinforcement in the same manner as described above, but also the transverse rib 11d can serve as the intake inlet wall 11b. Therefore, it can function as a guide for introducing the intake air into the intake air collecting chamber 2.

  Next, another example will be described with reference to FIGS. In addition, about the part similar to the above, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted. The shape of the base member 6 is slightly different in detail in the figure, but the essential parts are the same, and the same base member 6 as in the above embodiment may be used.

  As shown in FIGS. 8 and 10, the third cover member 21 is provided on all wall-like portions (11 a to 11 e, 12 a, 12 b) corresponding to the first and second coupling walls 11, 12 in the above embodiment. In order to be joined, an edge portion 21a having a shape corresponding to the second coupling wall 12 similar to the above and a partition wall 21b corresponding to the intake air introducing wall 11b and the transverse rib 11d are provided on the inner side. As a result, the inside of the third cover member 21 is partitioned by the partition wall 21b and is surrounded by the end wall 11a, the both intake introduction walls 11b and 11c, the transverse rib 11d, the bottom wall 11e, and the side wall 11f. A chamber 22 and a resonance chamber 23 surrounded by both transverse ribs 11d and 12a, an intake introduction wall 11b, and a side wall 12b are provided. The third cover member 21 is provided with a communication pipe 24 that communicates the intake air collecting chamber 22 and the resonance chamber 23 so as to penetrate the partition wall 21b.

  In this case, the partition wall 21b and the communication pipe 24 may be formed integrally with the third cover member 21 as described above, and the common base member 6 can be used, so that only the cover member is replaced. Thus, an intake device having the resonance chamber 23 can be obtained. As a result, in addition to the use of the difference in the shape and size of the intake air collecting chamber 2 described above, it can be applied as an intake device provided with the resonance chamber 23, and an intake device with higher versatility can be provided.

DESCRIPTION OF SYMBOLS 1 Intake device 2 Intake collecting chamber 3 Branch pipe 6 Base member 7a 1st cover member 7b 2nd cover member 11 1st coupling wall 12 2nd coupling wall 11b Intake inlet wall 11d * 12a Crossing rib 12b Connection wall 16 Closure wall 21 Cover Member 21b Partition wall 22 Inlet collecting chamber 23 Resonance chamber 24 Communication pipe

Claims (6)

A method for changing the volume of an intake air collection chamber in an intake device in which an intake air collection chamber is configured by a base member integrally formed with a plurality of branch pipes provided in parallel to each other and a cover member coupled to the base member. There,
The base member includes a plurality of transverse ribs extending across the branch pipes at different positions, and a plurality of transverse ribs including any one of the plurality of transverse ribs and defining different annular mating surfaces. And a connecting wall
The cover member is one replacement cover member selected from a plurality of replacement cover members of different sizes coupled to any one of the plurality of coupling walls ;
A method for changing the volume of the intake air collecting chamber in the air intake device , wherein the volume of the intake air collecting chamber is changed by coupling the selected one replacement cover member to the base member . 2. The volume change of the intake air collecting chamber in the intake device according to claim 1, wherein a part of the intake wall for introducing intake air into the intake air collecting chamber is formed by a part of the coupling wall. Way . A connecting wall connecting ends of the plurality of transverse ribs opposite to a part of the intake introducing wall of the two transverse ribs connected to both ends of the intake introducing wall in the plurality of transverse ribs; Have
The volume change of the intake air collecting chamber in the intake device according to claim 2, wherein the two transverse ribs, a part of the intake introduction wall, and the connection wall are arranged in a substantially rectangular shape. Way . Wherein the plurality of branch pipes are disposed at an interval in doctor each other,
4. The intake air collecting chamber in the intake device according to claim 1, wherein the base member has a blocking wall that blocks the space between adjacent ones of the plurality of branch pipes. 5. Volume change method . The plurality of branch pipes have a curved shape that protrudes outward of the engine,
The base member forms a concave wall of the plurality of branch pipes;
The volume of the intake air collection chamber in the intake device according to any one of claims 1 to 4, wherein the intake air collection chamber is defined by a concave wall of the plurality of branch pipes and the cover member. How to change . The cover member is sized to receive one of the plurality of transverse ribs therein, and is received in the interior to divide a space defined by the cover member and the base member. A partition wall coupled to the transverse rib, and a communication path formed in the partition wall to communicate the divided spaces of the space,
While split of the space is configured as the intake gas distribution chamber, the intake according to any one of claims 1 to 5 divided other of said space, characterized in that it is configured as a resonance chamber A method for changing the volume of an intake air collecting chamber in the apparatus.

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