Intake device for an engine

Abstract

Intake device of an engine comprising the following parts: an intake port (10) provided to allow intake air to flow in; a cylinder head (20) through which an intake duct (21) is formed so that the intake air flowing in through the intake manifold (10) is supplied to cylinders of the engine; a flow control valve (30) arranged in the intake manifold (10) and capable of regulating a flow direction of the intake air to generate a tumble flow in the intake air flowing into the cylinder head (20) from the intake manifold (10); a control plate (340) adapted to enhance the tumble flow of the intake air created in the flow control valve (30); and a support member (50) connected to the control plate (340) and connected between the intake manifold (10) and the cylinder head (20) so that the control plate (340) is inserted into the intake duct (21), wherein the control plate (340) comprises the following parts: a main body (341) inserted into the intake duct (21) and configured to enhance the tumble flow of the intake air; a fixing part (342) extending from both side ends of the main body (341) and configured to prevent the main body (341) from being detached from the support part (50); and a first stepped part (343) extending from both side ends of the main body (341) of the control plate (340) and formed to maintain a distance between the intake duct (21) and the main body (341), characterized in that the main body (341) comprises the following parts: an upper end part (341b); a bent portion (341c) bent at the upper end portion (341b) in a direction perpendicular to the flow direction of the intake air; and a lower end portion (341a) bent at the bent portion (341c) to form a stepped structure, wherein the upper end part (341b) extends from the first of the two side ends of the main body (341) to the bent part (341c), and wherein the lower end part (341a) extends from the bent part (341c) to the second of the two side ends of the main body (341).

Description

[Technical field of the invention]

[0001] The present invention relates to an intake device for an engine, namely an intake device of an engine, in which the intake air flowing in through an intake manifold is supplied into cylinders of the engine. [Technical background of the invention]

[0002] In general, increasing the power of an engine means converting the heat energy generated by combustion into force, which pushes the piston as far as possible. To achieve this, important conditions include a high combustion rate of the fuel, and, due to the characteristics of the gasoline engine, sufficient mixing of the air and fuel in a short time to improve the combustion rate.

[0003] Furthermore, the generation of turbulence (eddies), such as tumble flow, in an engine intake system is one of the methods that has been studied for a long time for the purpose of rapidly mixing air and fuel. When the mixture or mixer is well mixed in a short period of time, combustion stability is improved. As a result, not only does the combustion rate improve, but the ratio of fuel emitted without participating in the combustion process is also reduced, thus providing great benefits in terms of fuel consumption and exhaust emissions.

[0004] In particular, when the tumble flow is strengthened, the effect of rapid mixture generation and the effect of increasing turbulent kinetic energy can be obtained at the same time: Among these effects, increasing turbulent kinetic energy contributes to improving the combustion speed.

[0005] In the intake duct structure of a conventional engine, a plurality of guides for guiding the air flow direction are formed on the inner wall surface of the intake duct, thereby improving the combustion performance by adding the turbulence strength to the laminar swirling air flow flowing along the inside of the intake duct.

[0006] However, in the above-described prior art, a structure for improving combustion performance is added to the interior of the cylinder head, which requires the cylinder head to be newly manufactured or processed separately. This leads to problems such as increasing the cost of the vehicle and increasing the number of labor hours.

[0007] Therefore, a method for assembling a flow control valve and a control plate for generating flow between a cylinder head and an intake manifold has recently been developed. In particular, various control plate structures have been developed to enhance tumble flow.

[0008] In addition, a structure with a strong connecting force was developed so that the control plate cannot be detached despite the impact(s) due to the continuously flowing intake air and the tumble flow.

[0009] Known intake devices for an engine are described, for example, in KR 10 1 459 932 B1, CN 1 02 953 841 A, US 2010 / 0 294 228 A1, DE 198 56 309 A1 or JP 2010 - 174 722 A. [Summary of the invention]

[0010] The present invention has for its object to solve the above-described problems of the intake device of the conventional engine and to provide an intake device of an engine that enhances a tumble flow.

[0011] This object is achieved by an intake device for an engine according to claim 1 or claim 6.

[0012] As described above, as a result of the intake device of an engine according to the present invention, there are the effects that the tumble flow is enhanced, the durability is excellent, and the loss of flow is minimized, thereby improving the performance of the engine. [Brief descriptions of the invention]

[0013] They show: Fig. 1: an exploded perspective view of an intake device of an engine, Fig. 2: a perspective view showing a control plate and a control plate bracket, Fig. 3: a front view of a control plate according to an example, Fig. 4: a front view of a control plate according to a second example, Fig. 5: a perspective view of a control plate according to a third example, Fig. 6: a perspective view of a control plate according to a first embodiment of the present invention, Fig. 7: a perspective view of a control plate according to a second embodiment of the present invention, Fig. 8: a perspective view of the connecting part of the intake manifold from a support part of the control plate in an intake device of an engine according to an embodiment of the present invention, Fig. 9: a perspective view of a connecting part of the cylinder from a support part of the control plate in an intake device of an engine according to an embodiment of the present invention, Fig. 10: a sectional view showing a state in which an intake manifold, a control plate, and a support member of the control plate are connected to each other in an embodiment of the present invention, Fig. 11: a sectional view showing a state in which a control plate and an intake port are spaced apart from each other in an embodiment of the present invention, Fig. 12: a partially enlarged view of Fig. 11. [Embodiments of the invention]

[0014] In the following, preferred embodiments of the present invention are described in more detail with reference to the accompanying drawings.

[0015] Referring to the Fig. 1 and Fig. 10, an intake device of an engine comprises an intake manifold 10, a cylinder head 20, a flow control valve 30, a control plate 40, a control plate support part 50, a first sealing part 60 and a second sealing part 70.

[0016] At the same time, the flow control valve 30 and the first sealing part 60 are housed in the intake manifold 10, and one side surface of the support part of the control plate 50 is connected to the intake manifold 10. Another side surface of the support part of the control plate 50 is connected to the cylinder head 20, in which the second sealing part 70 is housed. At the same time, the control plate 40 is connected to the support part of the control plate 50 and is housed in the cylinder head 20.

[0017] The intake manifold 10 has a shape formed with a plurality of tubes to allow intake air to flow into a cylinder of an engine (not shown in the drawing).

[0018] The cylinder head 20 is connected to the control plate 50 and interconnected through the intake manifold 10 and the control plate 50. Accordingly, the cylinder head 20 serves as a passage for the intake air flowing in through the intake manifold 10, which in turn is supplied into a cylinder (not shown in the drawing). The cylinder head 20 is formed with a tubular intake port 21 connected to a cylinder (not shown in the drawing) of an engine, and the control plate 40 is disposed in the intake port 21.

[0019] Referring to the Fig. 10, the flow control valve 30 is arranged in the intake manifold 10 and is mounted on the intake manifold 10 so as to be rotatable about a rotation axis 31, in order to control the flow of intake air upon rotation about the axis. The flow control valve is formed in a curved control plate shape that corresponds to the shape of the inner peripheral surface of the intake manifold 10.

[0020] With reference to Fig. 3, the control plate 40 comprises a control plate main body 41, a fixing portion 42, a first stepped portion 43, a second stepped portion 44, and an extension portion 45.

[0021] At the same time, the main body of the control plate 41 is formed in a control plate shape, and the fixing portion 42 and the first stepped portion 43 extend from both side ends of the main body of the control plate 41. The second stepped portion 44 is formed extending from the main body of the control plate 41 in the direction of the intake manifold 10, and the extension portion 45 is formed extending from the main body of the control plate 41 in the cylinder direction of the engine (in the opposite direction to the intake manifold).

[0022] That is, although the control plate 40 is formed such that the fixing portion 42, the first stepped portion 43, and the second stepped portion 44 extend symmetrically with respect to the center line of the insertion direction of the main body of the control plate 41 (in the axial direction of the intake passage 21), it has an asymmetric shape as a whole because the extension portion 45 is formed only on one side with respect to the center line.

[0023] The fixing portion 42 is formed extending from both side ends of the main body of the control plate 41, and a fixing hole 42a is formed in the interior thereof. During injection molding of the support portion of the control plate 50, the fixing hole 42a is fixedly connected to the support portion of the control plate 50 by passing an injection molding material through the fixing hole during injection molding and then coagulating it.

[0024] Referring to the Fig. 3 and Fig. 11, the first stepped portion 43 is formed extending from both side ends of the main body of the control plate 41 and connected to one end portion of the fixing portion 42 in the cylinder direction. Further, the first stepped portion 43 is connected to the support portion of the control plate 50, so that a gap is maintained between the intake port 21 of the cylinder head 20 and the main body of the control plate 41. Although a gap between the intake port 21 and the main body of the control plate 41 is between 1.7 mm and less than 1.9 mm, it is not limited thereto.

[0025] The second stepped portion 44 is formed extending from the main body of the control plate 41 toward the intake port and is connected to the support portion of the control plate 50. At the same time, the end portion of the second stepped portion 44 in the intake port direction is positioned so as not to protrude outward from the support portion of the control plate 50, and is formed according to the shape of the flow control valve 30 to maintain the minimum distance from the flow control valve 30.

[0026] The extension portion 45 is formed extending from the end portion thereof in the cylinder direction of the engine (not shown in the drawing) and is formed on one side with respect to the axial center line of the main body of the control plate 41. Although the extension portion 45 protrudes in a trapezoidal shape, it is not limited to this; it may protrude in various shapes.

[0027] Referring to the Fig. 1, Fig. 8 and Fig. 9, the support part of the control plate 50 thus comprises an intake manifold connecting part 51, a cylinder connecting part 52, a through-connecting part 53, a mounting part 54 and a support frame 55.

[0028] At the same time, the connecting part of the intake manifold 51 is arranged in a direction opposite to the intake manifold 10. The connecting part of the cylinder 52 is arranged in a direction opposite to the cylinder head 20. The through-connecting part 53 and the mounting part 54 are formed in a hole shape that passes through a connecting part of the intake manifold 51 and a connecting part of the cylinder 52. Furthermore, the support frame 55 is formed on the connecting part of the cylinder 52.

[0029] The connecting part of the intake manifold 51 is directly connected to the intake manifold 10 and the first sealing part 60, which in turn is connected to the intake manifold 10.

[0030] The connecting part of the cylinder 52 is connected to the cylinder head 20 and the second sealing part 70 is used to seal the space between the cylinder head 20 and the connecting part of the cylinder 52.

[0031] The through-connecting part 53 is formed in a hole shape (a cylinder inner peripheral surface shape) that passes through the connecting part of the intake port 51 and the connecting part of the cylinder 52. The guide groove 53a is formed on the side wall (inner peripheral surface) to guide the rotation of the flow control valve 30. In addition, the control plate 40 is fixedly connected in the axial direction to the through-connecting part 53, and the fixing part 42 and the second stepped part 44 are fixed on the side wall. The main body of the control plate 41 and the extension part 45 protrude outward from the connecting part of the cylinder 52 and are received in the intake passage 21 of the cylinder head 20.

[0032] The mounting portion 54 is formed in a hole shape that passes through the connecting portion of the intake manifold 51 and the connecting portion of the cylinder 52. When the intake manifold 10 and the cylinder head 20 are connected to the mounting portion 54 with bolts, the mounting portion 54 may include a tubular fastening component (not shown in the drawing) to guide the engagement position of the bolt and prevent the bolts from loosening.

[0033] The support frame 55 is formed protrudingly on the connecting part of the cylinder 52 to prevent deformation.

[0034] With reference to Fig. 1, the first sealing part 60 is well-situated and connected in the intake manifold 10, but it is formed according to the shape of the intake manifold 10 and the through-connecting part 53 to prevent the intake air from leaking out. Although the first sealing part 60 is formed in a shape in which a plurality of rings are integrally connected to each other, it is not limited to this, but may also have a shape in which a plurality of rings are separated from each other.

[0035] Although the second seal part 70 is configured to be well-situated and connected to the connecting part of the cylinder 52, it is formed according to the shape of the intake port 21 and the through-connecting part 53 to prevent the intake air from leaking. Although the second seal part 70 is configured in a shape in which a plurality of rings are separated from each other, it is not limited thereto; it may also be configured in a shape in which a plurality of rings are integrally connected to each other.

[0036] With reference to Fig. 1 and Fig. 2 describes the manufacturing and assembly of an intake device for an engine. First, the control plate 40 is made of SUS (Steel, Use, Stainless) material, and the control plate 40 is placed in the injection mold. Thereafter, the support part of the control plate 50 is formed by an injection molding process in the state where the control plate 40 is placed in the injection mold. As a result, the fixing part 42 and the second stepped part 44 are firmly connected by being arranged in the support part of the control plate 50. Specifically, the fixing hole 42a is formed in the fixing part 42, and after an injection molding material is filled into the fixing hole 42a during injection molding, the connecting force between the fixing part 42 and the support part of the control plate 50 is strengthened even during coagulation.

[0037] When the control plate 40 and the support portion of the control plate 50 are completed, the second sealing portion 70 is well positioned on the support portion of the control plate 50, and the bolt formed in the cylinder head 20 is preliminarily inserted into the mounting portion 54 of the support portion of the control plate 50. At this time, if a fastening component (not shown in the drawing) is formed in the mounting portion 54, the support portion of the control plate 50 will not come out of the cylinder head 20. Finally, after the intake manifold 10, to which the first sealing portion 60 and the flow control valve 30 are connected, is attached to the connecting portion of the intake manifold 51, the bolt of the cylinder head 20 is fastened with a nut, thus completing the assembly.

[0038] Referring to the Fig. 1, Fig. 10 and Fig. Figure 11 describes the action of an engine intake device according to the flow of intake air: First, the intake air flows in along the intake port 10. At this time, the upper and lower portions of the intake air move at a uniform speed. When the intake air hits the upper flow control valve 30, the lower portion of the intake air is guided along the flow control valve 30 to the upper portion of the intake port 10, creating a speed difference with the upper intake air, thus creating tumble flow.

[0039] At the same time, the second stepped portion 44 is formed according to the shape of the flow control valve 30, so that the space between the flow control valve 30 and the control plate 40 is minimized, thereby preventing the tumble flow from being reduced during the intake air discharge. Furthermore, since the control plate 40 is formed asymmetrically by the extension portion 45, the intake air flow becomes unstable. Therefore, the tumble flow of the intake air is enhanced, and the loss of the generated tumble flow is reduced, ultimately improving engine performance.

[0040] At the same time, the first stepped part 43 is formed to prevent the intake port 21 and the main body of the control plate 41 from rubbing against each other during the assembly of the control plate 40.

[0041] Since the guide groove 53a is formed on the through-connecting part 53, the rotation angle of the flow control valve 30 is increased, and consequently, the intake air control efficiency is also improved. Since the first sealing part 60 is connected to the second sealing part 70, the intake air leakage is prevented, thereby improving engine performance.

[0042] In addition, the fixing part 42 and the fixing hole 42a are formed so as to increase the number of impacts on the control plate 40 due to the generation of the tumble flow, thereby strengthening the tumble flow, and are integrally joined to the support part of the control plate 50 by an injection molding process, thereby improving the durability thereof.

[0043] Fig. 4 shows an example of a control plate. In this example, the control plate 140 includes a control plate main body 141, a fixing portion 142, a first stepped portion 143, a second stepped portion 144, and an extension portion 145. The second stepped portion 144 is formed to protrude sharply toward the intake port. The space between the flow control valve 30 and the control plate 140 is minimized, further enhancing the tumble flow.

[0044] Fig. 5 shows another example of a control plate. In this example, the control plate 240 includes a control plate main body 241, a fixing portion 242, a first stepped portion 243, a second stepped portion 244, and an extension portion 245. The control plate main body 241 is formed with dimples 246 on its surface. Tumble flow is caused as intake air flows in along the dimples 246, with an overall effect of enhancing the tumble flow.

[0045] Fig. 6 shows a first embodiment of the present invention. In this embodiment, the control plate 340 includes a control plate main body 341, a fixing portion 342, a first stepped portion 343, and a second stepped portion 344. The control plate main body 341 includes a lower end portion 341a, an upper end portion 341b, and a bent portion 341c. That is, the control plate main body 341 is formed with the bent portion 341c bent twice along the axial direction, and the lower end portion 341a and the upper end portion 341b are formed as a bent step. According to the present embodiment, the intake air moves unstably through the lower end portion 341a and the upper end portion 341b, thereby exerting an effect on enhancing the tumble flow.

[0046] Fig.7 shows a second embodiment of the present invention. In this embodiment, the control plate 440 comprises a control plate main body 441, a fixing portion 442, a first stepped portion 443, a second stepped portion 444, and an extension portion 445. The control plate main body 441 in turn comprises a first control plate 441a, a first bent portion 441b, a second control plate 441c, a second bent portion 441d, and a third control plate 441e. The extension portion 445 thus comprises a first extension portion 445a and a second extension portion 445b. At the same time, the first control plate 441a is connected to the second control plate 441c by the first bent portion 441b and to the third control plate 441e by the second bent portion 441d.Furthermore, the first bent part 441b and the second bent part 441d are formed to branch to both sides of the first control plate 441a. The first bent part 441b is bent so that the first control plate 441a and the second control plate 441c form a step, and the second bent part 441d is bent so that the first control plate 441a and the third control plate 441e form a step. In other words, the main body of the control plate 441 of this embodiment is formed so that its section has a shape similar to a tuning fork. According to the present embodiment, there is an effect of enhancing the tumble flow while the turbulence is generated in the intake air by the first control plate 441a, the second control plate 441c, and the third control plate 441e.

[0047] While the present invention has been particularly illustrated and described with reference to exemplary embodiments, it is to be understood that this invention is not limited to the disclosed embodiments, but it will be apparent that changes or modifications may be made by those skilled in the art. List of reference symbols 10 intake manifolds 20 cylinder head 21 Intake duct 30 Flow control valve 40, 140, 240, 340, 440 control plate 41, 141, 241, 341, 441 Main body of the control plate 42, 142, 242, 342, 442 fastening part 42a, 142a, 242a, 342a, 442a mounting hole 43, 143, 243, 343, 443 first stepped part 44, 144, 244, 344, 444 second stepped part 45, 145, 245 extension part 246 dimples 341a lower end part 341b upper end part 341c curved part 441a first control plate 441b first curved part 441c second control plate 441d second curved part 441e third control plate 50 Control plate support part 51 Connecting part of the intake manifold 52 Connecting part of the cylinder 53 Through connection part 53a Guide groove 60 first sealing part 70 second sealing part

Claims

[1] Intake device of an engine comprising the following parts: an intake port (10) provided to allow intake air to flow in; a cylinder head (20) through which an intake duct (21) is formed so that the intake air flowing in through the intake manifold (10) is supplied to cylinders of the engine; a flow control valve (30) arranged in the intake manifold (10) and capable of regulating a flow direction of the intake air to generate a tumble flow in the intake air flowing into the cylinder head (20) from the intake manifold (10); a control plate (340) adapted to enhance the tumble flow of the intake air created in the flow control valve (30); and a support member (50) connected to the control plate (340) and connected between the intake manifold (10) and the cylinder head (20) so that the control plate (340) is inserted into the intake duct (21), wherein the control plate (340) comprises the following parts: a main body (341) inserted into the intake duct (21) and configured to enhance the tumble flow of the intake air; a fixing part (342) extending from both side ends of the main body (341) and configured to prevent the main body (341) from being detached from the support part (50); and a first stepped part (343) extending from both side ends of the main body (341) of the control plate (340) and formed to maintain a distance between the intake duct (21) and the main body (341), characterized by , that the main body (341) comprises the following parts: an upper end part (341b); a bent portion (341c) bent at the upper end portion (341b) in a direction perpendicular to the flow direction of the intake air; and a lower end portion (341a) bent at the bent portion (341c) to form a stepped structure, wherein the upper end part (341b) extends from the first of the two side ends of the main body (341) to the bent part (341c), and wherein the lower end part (341a) extends from the bent part (341c) to the second of the two side ends of the main body (341). [2] Intake device of an engine according to claim 1, characterized by that the control plate (340) further comprises a second stepped part (344) which is connected to the support part (50) and extends from the main body (341) towards the intake manifold (10). [3] Intake device of an engine according to claim 2, characterized bythat the second stepped part (344) is formed projecting so as to correspond to the shape of the flow control valve (30) in order to maintain the minimum distance from the flow control valve (30). [4] Intake device of an engine according to claim 1, characterized by that the main body (341) is formed asymmetrically with its end part in the cylinder direction of the engine in order to increase the tumble flow of the intake air. [5] Intake device of an engine according to claim 4, characterized by that the main body (341) is formed with dimples on its surface. [6] Intake device of an engine comprising the following parts: an intake port (10) provided to allow intake air to flow in; a cylinder head (20) through which an intake duct (21) is formed so that the intake air flowing in through an intake manifold (10) is supplied to cylinders of the engine; a flow control valve (30) arranged in the intake manifold (10) and capable of regulating a flow direction of the intake air to generate a tumble flow in the intake air flowing into the cylinder head (20) from the intake manifold (10); a control plate (440) adapted to enhance the tumble flow of the intake air created in the flow control valve (30); and a support member (50) connected to the control plate (440) and connected between the intake manifold (10) and the cylinder head (20) so that the control plate (440) is inserted into the intake duct (21), wherein the control plate (440) comprises the following parts: a main body (441) inserted into the intake passage (21), one end part of the main body (441) being formed asymmetrically in the cylinder direction of the engine to enhance the tumble flow of the intake air; a fixing part (442) extending from both side ends of the main body (441) and configured to prevent the main body (441) from being detached from the support part (50); and a first stepped part (443) extending from both side ends of the main body (441) of the control plate (440) and formed to maintain a distance between the intake duct (21) and the main body (441), characterized by , that the main body (441) comprises the following parts: a first control plate (441a); a second control plate (441c) formed extending from the first control plate (441a), the first control plate (441a) being connected to the second control plate (441c) by a first curved step (441b); and a third control plate (441e) formed extending from the first control plate (441a), the first control plate (441a) being connected to the third control plate (441e) by a second curved step (441d), the third control plate (441e1) being formed parallel to the second control plate (441c). [7] Intake device of an engine according to claim 1 or 6, characterized by that the fixing part (342, 442) of the control plate (340, 440) is formed with a fixing hole so that an injection molding material passes through the fixing hole during injection molding and is then coagulated to be fixed to the support part (50) of the control plate (340, 440). [8] Intake device of an engine according to claim 1 or 6, characterized by that the support part (50) comprises the following parts: a connecting part (51) of the intake manifold (10) which is designed to be connected to the intake manifold (10); a connecting part (52) of the cylinder head (20) which is designed to be connected to the cylinder head (20); and a through-connecting part (53) formed with a guide groove for guiding rotation of the flow control valve (30), the through-connecting part (53) being connected between the intake port (10) and the intake passage (21) and being receptively connected to the control plate (340, 440). [9] Intake device of an engine according to claim 8, characterized by that the support part (50) further comprises a mounting part (54) which is formed with bolts which are connected between the intake manifold (10) and the cylinder head (20). [10] Intake device of an engine according to claim 1 or 6, characterized bythat the support part (50) further comprises the following parts: a first sealing part (60) connected to the intake manifold (10) and configured to seal a space between the intake manifold (10) and the support part (50); and a second sealing part (70) connected to the support part (50) and configured to seal a space between the support part (50) and the cylinder head (20). [11] Intake device of an engine according to claim 1 or 6, characterized by that the support part (50) is formed by injection molding, while the control plate (340, 440) is arranged in an injection mold.

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