KR0121313B1 - Intake manifold for automobile - Google Patents

Abstract

The intake manifold of automotor engine has a main runner(2), separate runners(7,7') and cylinder head connecting flanges(8,9,10). The main runner(2) is comprised of an upper cap(3), a lower cap(4), a throttle body connector(5) and an end cap(6). The upper cap(3) is formed by an aluminum material and molded in an extruding-drawn manner, and the lower cap(4) is slidably inserted into the upper cap(3) and has a plurality of connecting holes(23,23') for connecting the separate runners(7,7'). After the coupling of the lower cap(4) with the upper cap(3), the throttle body flange(5) and the end cap(6) are fixedly inserted into each other.

Description

An intake manifold of engine in automotive

The present invention relates to an intake manifold of an internal combustion engine, and in particular, combines a cylinder head and a branched runner part which is formed of aluminum and has an easy plastic working structure to reduce the weight of the engine and ensure reliability. The present invention relates to an intake manifold of an internal combustion engine that increases durability and improves suction flow of outside air and suppresses noise.

In general, in an internal combustion engine of an automobile, an intake manifold supplies an equal amount of air or a mixer to each cylinder of an engine. In the case of a diesel engine or a port injection engine, only air is supplied. In the case of the carbureted system and throttle body injection engines, the mixer is supplied.

Conventionally, in order to manufacture the above intake manifold, it was produced by casting or aluminum die casting. The intake manifold manufactured by casting has a disadvantage that its weight is heavy, and both of them have a rough inner and outer surface, and thus, the intake air flow is not smooth, and the inner surface has to be reworked to improve the suction efficiency.

Therefore, the intake manifold of Korean Patent No. 3611 and its manufacturing method were invented. This is as follows.

The prior art described above is mainly composed of a main body runner, separate runners, connectors, etc. in the indium manifold, and they are configured to be soldered together. Therefore, the smoothness of the flow path of the intake air can be improved, and the intake air efficiency can be slightly increased. However, since the manufacturing process of the main runner is quite difficult and cumbersome, there are considerable difficulties in practical application to the product.

That is, the intake manifold according to the prior art process the main runner with aluminum whole material, one end of the main runner is closed and the other end is opened, the inner end of the main runner is formed with a plurality of inner end for the branched runner At this inner end, an outward protrusion for mounting the branch runner was formed integrally.

The drawing step of the intake manifold according to the prior art is as follows.

First, the same number of connecting holes as the number of branch runners branched on the main wall of the main runner are formed in a separate process

Secondly, the inner diameter is formed around the connection hole integrally formed with the outward projection portion the same as the inner diameter of the branch runner,

Third, at the tip of the outward projection, the inner diameter is larger than the outer diameter of the branch pipe to form an expansion pipe,

Fourth, on the outer circumferential surface of the branch runner is formed by repeating the outer projection at intervals in the circumferential direction to form a solder storage gap,

Fifth, both ends of the branch runner are soldered so that their axes coincide with each other in the expansion part.

According to the conventional technology described above, a cumbersome step is required to couple the main runner and the branch runner of the intake manifold, and the structural durability thereof is extremely degraded.

The present invention has been invented to solve the above problems, an object of the present invention is to reduce the weight of the engine by combining the cylinder head and the branched runner to the main runner portion formed of aluminum and easy to plastic processing The present invention provides an intake manifold of an internal combustion engine that ensures reliability, increases durability, and facilitates suction flow of outside air and suppresses noise.

In order to achieve the above object, the present invention, the main runner portion connected to the throttle body of the intake cylinder of the internal combustion engine, the branch runner portion connected to the main runner portion for distributing outside air to each cylinder of the engine, and the An intake manifold of an internal combustion engine comprising a connector portion mounted to a portion connected to an engine of a branch runner portion, the main runner portion having an upper portion closed and a lower side opened and an upper cap formed through the left and right sides; A lower cap mounted on the inner side of the upper cap and having a shape coupled to the upper cap on a circumference of the longitudinal direction and forming an intake passage communicating with the branch runner portion; A throttle body connector coupled to one side of the upper cap to which the lower cap is coupled to form a coupling structure toward the upper cap; The throttle body connector is coupled to the opposite side of the upper cap is coupled to the intake manifold of the internal combustion engine, characterized in that composed of the end cap having a coupling structure toward the upper cap.

1 is an overall perspective view showing an intake manifold of an internal combustion engine according to an embodiment of the present invention.

2 is an exploded perspective view of FIG.

3 is a cross-sectional view of the main runner of FIG.

4 is an enlarged view of a part of FIG.

5 is a cross-sectional view taken along the line AA ′ of FIG. 3.

6 is an enlarged view of β in FIG. 5;

7 is a cross-sectional view taken along the line B-B 'of FIG.

8 is an enlarged view of a part γ in FIG. 5.

9 is a cross-sectional view taken along the line CC ′ of FIGS. 5 and 8.

FIG. 10 is an enlarged view of part δ of FIG. 5.

11 is a cross-sectional view taken along the line D-D 'of FIG.

12 is a partial cross-sectional view showing a coupling means of the flange portion and the branch runner portion coupled to the cylinder head of FIG.

13 is an enlarged view of the ε part of FIG.

14 is a cross-sectional view taken along the line E-E 'of FIG.

* Explanation of symbols for main parts of the drawings

1: Intake manifold 2: Main runner part

3: upper cap 4: lower cap

5: Throttle Body Connector 6: End Cap

7: branch runner part 8: center connector

9: left connector 10: light connector

11: mounting boss 12: vibration reinforcement bracket

13: fitting jaw 14: fitting groove

15 solder 16 concave groove

17: mounting holes 18, 20: fitting step

19,19 ', 21,21', 25,25 ', 28,28': protrusion

22: through hole 23,23 ', 26,26': inner end

27,27 ': Chin 29,29': Via fitting

30,30 ', 31,31': Female thread 32,32 ': Jointer

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

1 is an overall perspective view showing an intake manifold 1 of an internal combustion engine according to an embodiment of the present invention, wherein the main runner portion 2, the branch runner portion 7, and the connector portions 8, 9, 10 are shown in FIG. Consisting mainly of the mounting boss 11 and includes a vibration reinforcement bracket (12).

FIG. 2 is an exploded perspective view of FIG. 1, where each component of FIG. 1 can be viewed in more detail.

The main runner part 2 is composed of an upper cap 3, a lower cap 4, and a throttle body connector 5 and an end cap 6, which are made of aluminum and have an easy plastic processing. have. That is, the upper cap 3 is blocked by the upper portion, the left and right sides are penetrated through the process of cold forging, extrusion, drawing in the form of the lower side is opened. The lower cap 4 is mounted on the lower side of the upper cap 3, the throttle body connector 5 is mounted on the left side, and the end cap 6 is mounted on the right side of the figure. The lower cap (4) has a width corresponding to the open width on the lower side of the upper cap (3), and forms an extended intake passage with the branch runner (7), the upper side on both sides in the longitudinal direction It is structured for coupling with the cap 3. In addition, the throttle body connector 5 has a through hole 22 for inflow of air, and has a shape for coupling in the direction in which the upper cap 3 is coupled. In addition, the end cap 6 has a shape corresponding to the side shape of the upper cap 3, and likewise has a shape for coupling to the portion facing the upper cap (3).

The branch runner portion 7 generally forms the same number as the number of cylinders of the engine (not shown). Therefore, in the present embodiment, four branch runners 7a and 7b are coupled to the four-cylinder engine with the same length, and the upper end of each branch runner 7a and 7b is the main runner portion 2. It is formed in a posture that is coupled to the lower cap 4 of the), the lower end is bent to form a posture that is coupled to the connector portion (8, 9, 10) mounted to the engine. The branch runner portion 7 is formed of aluminum extrusion material.

The connector parts 8, 9, and 10 are formed of an aluminum cold forging, and are composed of a center connector 8, a left connector 9, and a light connector 10, and the branch runner part 7 is coupled thereto. A hole is formed. The center connector 8 has a shape for engaging the center branch runner.

The mounting boss 11 is mounted through the respective branch runners 7a, 7b ... before being coupled to the connector portions 8, 9, 10, which is equal to the branch runners 7a, 7b. Fitting through-holes 29 and 29 'are formed, and the branch runners 7a and 7b are inserted and then fixed with solder. Further, female thread holes 30 and 30 'are respectively formed at the upper left and right sides of the mounting boss 11 to install the rails of the fuel injection device, and female thread holes 31 and 31' are fixed to the engine at the lower left and right sides thereof. To form.

The vibration reinforcement bracket 12 is inserted into the branch runners 7a, 7b ... mounted on the lower cap of the main runner 2 and coupled with solder to interconnect them to perform a function of lowering vibration below a prescribed value. It is. Accordingly, the vibration reinforcing bracket 12 is formed in a direction in which the semicircular connecting holes 32 and 32 'for the branch runners 7a and 7b are mounted, which is the outer surface of the branch runners 7a and 7b. It is connected to and fixed with solder.

FIG. 3 is a cross-sectional view of the main runner part 2 of FIG. 1, in particular showing the coupling structure of the upper cap 3 and the lower cap 4. As shown in FIG.

The upper cap 3 has a tunnel shape in which the upper part is closed and the lower part is open as described above. In addition, the fitting groove 14 and the solder storage concave groove 16 are formed in a portion engaged with the lower cap 4, and the solder 15 is formed in the solder storage concave groove 16. It is mounted by slide fitting in the longitudinal direction.

Correspondingly, the lower cap 4 mounted on the upper cap 3 forms a fitting jaw 13 corresponding to the fitting groove 14 on both sides of the upper cap 3, and has a predetermined distance from the center of the width direction. The inner side has a rounded shape for smooth flow of the intake air and forms an intake passage. The inner end 23, 23 'is formed at the lower side thereof, and the branch runner can be mounted by making the diameter larger than the intake passage. It was.

The lower cap 4 is to be fitted in the longitudinal direction formed by fitting the fitting jaw 13 to the fitting groove 14 of the upper cap 3 to be fixed in the opening direction.

4 is an enlarged view of a part of FIG. As described above in the drawings, the fitting jaw 13 of the lower cap 4 is coupled to the fitting groove 14 formed in the portion coupled to the lower cap 4 of the upper cap 3 of the main runner part 2. It can be seen that the solder 15 is mounted in the concave groove 16 for solder storage formed in the upper cap 3.

FIG. 5 is a cross-sectional view taken along line AA ′ of FIG. 3, showing a longitudinal section in a state where the main runner portion 2 and the branch runner portion 7 are coupled to each other. This is a coupling structure of the upper cap 3 and the lower cap 4 of the main runner part 2 and the throttle body connector 5 and the end cap 6 and the branch runner part 7 on the lower cap 4. It shows the attached state.

Reference numeral 17 in the drawings is a mounting hole for mounting a vacuum degree sensor not shown.

FIG. 6 is an enlarged view of the beta portion of FIG. 5 and shows the coupling structure of the end cap 6 to the upper cap 3 of the main runner portion 2 in detail.

The upper cap 3 has the same thickness toward the end cap 6, but the end cap 6 forms a structure that is coupled toward the upper cap (3). That is, the inner surface of the end cap 6 has a shape of forming a constant radius of curvature R in the combined direction, thereby forming a fitting step 18 on the outer circumference. In addition, the protrusions 19 and 19 'are formed in the opposite direction to the direction in which the fitting step 18 is coupled, and the outer edge is formed so as to form the same surface as the upper cap 3 after the coupling. The fitting step 18 forms the solder storage gap t by the protrusions 19 and 19 '.

FIG. 7 is a cross-sectional view taken along line B-B 'of FIG. 6, in which the end cap 6 is mounted in the upper cap 3, and the upper cap 3 and the end cap 6 are protrusions 19. As shown in FIG. , 19 '), and the solder storage gap t is formed therebetween.

FIG. 8 is an enlarged view of a part γ in FIG. 5. This is to show in detail the state in which the upper cap (3) and the roller body connector (5) is coupled.

The upper cap 3 has the same cross-section toward the throttle body connector 5, but the throttle body connector 5 has a structure that is coupled toward the upper cap 3.

The inner surface of the throttle body connector 5 has a rounding shape with a predetermined curvature R toward the inner surface of the upper cap 3, whereby the fitting step 20 is formed, and the throttle at the fitting step 20 is provided. Protruding portions 21 and 21 'are formed in the opposite direction to the coupling direction of the body connector 5 so as to be in contact with the inner surface of the upper cap 3. In addition, a gap for solder storage t is formed in the gap formed by the protrusions 21 and 21 ′ of the fitting step 20.

FIG. 9 is a cross-sectional view taken along line C-C 'of FIGS. 5 and 8, and is shown in the direction in which the throttle body connector 5 is mounted on the upper cap 3. Therefore, it can be seen that the upper cap 3 and the throttle body connector 5 are in contact with the protruding portions 21 and 21 ', and a gap for solder storage t is formed therebetween.

FIG. 10 is an enlarged view of the δ portion of FIG. 5, and a branched runner at the coupling structure of the end cap 6 and the lower cap 4 and the inner ends 23 and 23 ′ enlarged downward to the lower cap 4. The state which attached the part 7 is shown.

The end cap 6 and the lower cap 4 are mounted to the upper cap 3 in a direction perpendicular to each other. As described above, the end cap 6 forms a rounded shape by forming a constant curvature R in the direction in which the inner surface is mounted, and the fitting step 18 is formed on the outer circumference thereof. Then, protrusions 19 and 19 'are formed in the opposite direction to the direction in which the fitting step 18 is coupled. In addition, the fitting step 18 forms the solder storage gap t by the protrusions 19 and 19 '.

The lower cap 4 forms a flange toward the fitting step 18 of the end cap 6 and extends for the branch runner portion 7 in a direction perpendicular to the forming direction thereof. A branch runner portion 7 is attached to the inner ends 23, 23 'formed inside the extended portion to form an intake passage having the same surface.

FIG. 11 is a cross-sectional view taken along the line D-D 'of FIG. 5 and shows a state where the branch runner portion 7 is coupled to the lower cap 4.

As described above, the branch runner part 7 is fitted to the extension part of the lower cap 4, and the inner surface of the lower cap 4 forms inner ends 23 and 23 ′, and the inner end ( 23 and 23 'are formed at regular intervals from each other to form protrusions 25 and 25'. The inner surfaces of the protrusions 25 and 25 ', the inner ends 23 and 23', and the gap for solder storage t are formed.

FIG. 12 is a partial cross-sectional view showing the means by which the branch runner portion 7 is coupled to the connector portions 8, 9, and 10 engaged with the cylinder head of FIG.

The branch runner portion 7 is fitted to the inner end portions 26 and 26 'formed inside the connector portions 8, 9 and 10, and an intake passage in the branch runner portion 7 is provided with the inner end portion ( In the jaws 27 and 27 'resulting from the formation of 26, 26', the inner surface is formed in the same manner as the intake passages of the connector portions 8, 9 and 10.

Solder 15 is located around the branch runner portion 7 mounted on the upper ends of the connector portions 8, 9 and 10, which is used for fixing the branch runner portion 7.

FIG. 13 is an enlarged ε part of FIG. 12. As described above, the branch runner portion 7 is mounted on the inner ends 26, 26 'of the connector portions 8, 9, 10, and the solder 15 Is melted and filled between the connector portions 8, 9, 10 and the branch runner portion 7 to thereby secure the engaged state of the branch runner portion 7.

The solder 15 shown in this figure is representatively shown to be melted and filled in the solder storage gap t shown in FIGS. 3 and 4, 6 and 7, and 8 to 11. .

FIG. 14 is a cross sectional view taken along the line E-E 'of FIG. 12, and projections 28 and 28' are formed at the inner ends 26 and 26 'of the connector portions 8, 9 and 10, respectively. It is formed toward.

A gap between solder storage portions t is formed between the inner ends 26, 26 'of the connector portions 8, 9, 10 and the branch runner portion 7 by the protrusions 28, 28'. It is.

As described above, the intake manifold of the internal combustion engine according to the preferred embodiment of the present invention couples the lower cap and the throttle body connector and the end cap to the upper cap of the main runner portion by solder, and the branch runner portion is also soldered to the lower cap. Is coupled to, the branch runner portion is coupled to the connector portion. Then, the mounting boss and the vibration bracket are fixed to the branch runner parts by soldering, respectively.

Such an intake manifold of the internal combustion engine according to an embodiment of the present invention

First, the upper cap, the lower cap throttle body connector and the end cap of the main runner part have a gap for solder storage and are fixed by soldering, so that the processability can be improved as compared with the conventional main runner part manufacturing.

Secondly, because the top cap is molded by aluminum extrusion and drawing, it can improve the flow of air,

Third, since the upper cap, the throttle body connector, the end cap is rounded to form a predetermined curvature change, and the like, the air flow is smoother, thereby improving the output of the engine.

Since what has been described above is merely a mere example in all respects, the present invention should not be limitedly interpreted based on this. Therefore, modifications and equivalent embodiments that fall within the true spirit and scope of the present invention shall fall within the claims of the present invention.

Claims (5)

A main runner part 2 connected to the throttle body of the intake cylinder of the internal combustion engine, a branch runner part 7 connected to the main runner part 2 to distribute outside air to each cylinder of the engine, and the branch In the intake manifold of the internal combustion engine which consists of the connector parts 8, 9, and 10 mounted in the part connected to the engine of the runner part 7, respectively, and forms the clearance gap for solder storage, The said main runner Part 2 has an upper cap (3) is closed and the upper side is open and the left and right sides are formed through; A lower cap (4) mounted on the inner side of the upper cap (3) and having a shape coupled to the upper cap (3) on the outer periphery of the longitudinal direction and forming an intake passage communicating with the branch runner portion (7); A throttle body connector (5) coupled to one side of the upper cap (3) to which the lower cap (4) is coupled and forming a coupling structure toward the upper cap (3); Intake manifold of the internal combustion engine, characterized in that the throttle body connector (5) is coupled to the opposite side of the upper cap (3) coupled to the end cap (6) having a coupling structure toward the upper cap (3). The internal combustion of claim 1, wherein the upper cap (3) forms a fitting groove (14) from the top in the longitudinal direction on both sides of the lower inner surface, and the recess groove (16) is formed in the longitudinal direction thereunder. Intake manifold of the engine. According to claim 1, wherein the lower cap (4) is formed in the longitudinal direction corresponding to the fitting step (13) corresponding to the fitting groove 14 of the upper cap (3) on both sides in the width direction, forming an extension to the lower side and the inner side The inner combustion engine, characterized in that it has a diameter larger than the diameter of the intake passage to form a rounding, and the inner end (23, 23 ') forming a protrusion 25, 25' with a predetermined interval on the inner surface thereof Intake manifold. The throttle body connector (5) has a rounded shape with an inner surface having a constant curvature (R) toward the inner surface of the upper cap (3), and the fitting step (20) toward the upper cap (3). An intake manifold of the internal combustion engine, characterized in that the protrusions (21, 21 ') are formed on the side opposite to the engagement direction. According to claim 1, The end cap (6) has a shape to form a constant radius of curvature (R) in the direction coupled to the inner surface, the fitting step 18 is formed on the outer periphery, the fitting step 18 The intake manifold of the internal combustion engine, characterized in that the protrusion (19, 19 ') is formed in the opposite direction of the coupling direction, and the outer edge forming the same surface as the upper cap (3) after coupling.