JP6502723B2 - Bulkhead plate - Google Patents

Description

  The present invention relates to a bulkhead plate that partitions an intake passage of an engine.

  Conventionally, as in the engines described in Patent Documents 1 and 2, there is a technology of providing a partition plate that divides the intake flow path into two flow paths in order to generate tumble (longitudinal vortex) flow in the intake air flowing into the cylinder. It is being developed. When the intake flow rate is small, one flow path partitioned by the partition plate is closed by a valve to increase the flow velocity of intake air flowing into the combustion chamber from the other flow path, thereby forming a tumble flow in the combustion chamber.

Japanese Patent Application Laid-Open No. 2002-70566 JP 2007-327487 A

  By the way, in order to reduce the weight and the cost, development has been advanced to switch the material of the partition plate from metal to resin. Since the resin partition plate is less rigid than the metal partition plate, it is necessary to provide reinforcing ribs. It is desirable that the reinforcing rib has a large influence on the flow of intake air and has a shape that does not easily disturb the flow of intake air.

  Then, an object of this invention is to provide the partition plate which does not disturb the flow of intake air easily.

In order to solve the above problems, the partition wall plate of the present invention is provided between the combustion chamber and the on-off valve, the air intake passage, a first intake passage is opened and closed by the opening and closing valve, the second is not opened and closed by the opening and closing valve A partition plate that divides into two intake passages, which is fixed in the intake passage and that is made of a resin main body portion that divides the intake passage into a first intake passage and a second intake passage, and the first intake passage of the main body portion A reinforcing rib provided on both the first surface facing the second surface and the second surface facing the second intake passage or at least the second surface and extending from the on-off valve side to the intake port side; The reinforcing rib provided on at least the second surface has a step formed by projecting more toward the intake port with respect to the end on the on-off valve side, the end on the on-off valve side The width of the Characterized in that it is a tapered shape reduced.

In order to solve the above problems, another partition plate of the present invention is provided between the on-off valve and the combustion chamber, and the intake passage is not opened or closed by the first intake passage opened or closed by the on-off valve. A partition plate dividing into a second intake passage, which is fixed in the intake passage and is made of a resin main body portion which divides the intake passage into a first intake passage and a second intake passage; A reinforcing rib provided on both of the first surface facing the passage and the second surface facing the second intake passage and extending from the on-off valve side to the intake port side ; The end on the opening / closing valve side is tapered such that the width gradually decreases toward the tip, and both the first surface facing the first intake passage and the second surface facing the second intake passage As well as being provided, the end on the intake port side is The protruding height is gradually reduced toward the end, and the gradually decreasing portion of the reinforcing rib provided on the second surface is inclined more than the gradually decreasing portion of the reinforcing rib provided on the first surface It is characterized by gradual der Rukoto.

  The reinforcing rib may be provided at the center in the width direction of the main body.

  The end on the intake port side in the second surface may be provided with an inclined portion that inclines toward the first intake passage as it goes to the tip.

  The inclined portion may have a curved shape.

  According to the present invention, it is possible to make it difficult to disturb the flow of intake air.

It is an explanatory view for explaining an arrangement part of a partition plate. It is an external view of a partition plate. It is explanatory drawing for demonstrating the shape of the main-body part of a partition plate.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values and the like shown in this embodiment are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the specification and the drawings, elements having substantially the same functions and configurations will be denoted by the same reference numerals to omit repeated description, and elements not directly related to the present invention will not be illustrated. Do.

  FIG. 1 is an explanatory view for explaining an arrangement site of the partition plate 1. FIG. 1 (a) shows a front view of the partition plate 1 disposed in the intake manifold side intake passage 2 (intake passage) and the head side intake passage 3 (intake passage), and FIG. 1 (b) shows the intake manifold side. The side view of the partition plate 1 distribute | arranged to the intake passage 2 and the head side intake passage 3 is shown.

  The intake manifold side intake passage 2 is a part of the intake manifold, and the head side intake passage 3 is an intake passage formed in a cylinder head of the engine. As shown in FIG. 1, the head side intake passage 3 is connected to the intake manifold side intake passage 2. That is, the intake manifold side intake passage 2 and the head side intake passage 3 communicate with each other.

  The head-side intake passage 3 communicates with two intake ports 3a and 3b (intake ports) formed in the combustion chamber. And each intake port 3a, 3b is opened and closed by the intake valve 4 shown in FIG.1 (b). In FIG. 1 (a), the intake valve 4 is omitted.

  The intake air flowing into the head side intake passage 3 from the intake manifold side intake passage 2 is introduced into the combustion chamber from each of the intake ports 3a and 3b when the intake valve 4 is opened.

  The partition plate 1 extends from the intake manifold side intake passage 2 to the head side intake passage 3. Then, as shown in FIG. 1 (b), the partition plate 1 includes the first intake passage 5a and the second intake passage 5b in the intake passage 5 (in manifold side intake passage 2 and head side intake passage 3) through which intake air flows. Divide into

  As shown in FIG. 1 (b), the partition plate 1 is disposed on the lower side in FIG. 1 (b) at the portion of the intake passage 5 where the partition plate 1 is disposed, and the partition plate The upper first intake passage 5a divided by 1 has a wider flow path than the lower second intake passage 5b. Further, a TGV (Tumble Generation Valve) 6 as an open / close valve is provided on the upstream side of the bulkhead plate 1 in the intake manifold side intake passage 2.

  In FIG.1 (c) and FIG.1 (d), the dashed-dotted line part in FIG.1 (b) is expanded and shown. However, FIG.1 (c) shows the state which TGV6 has closed, and FIG.1 (d) shows the state which TGV6 has opened.

  The TGV 6 has a valve body 6a. As shown in FIG. 1 (c) and FIG. 1 (d), the valve body 6a has a roughly flat plate shape, and the shaft 6b is fixed to one surface. When the shaft 6b is rotated by a motor (not shown), the valve body 6a is rotated to open and close the first intake passage 5a.

  In the state shown in FIG. 1C, the degree of opening of the TGV 6 is minimized, and the first intake passage 5 a is almost closed by the TGV 6. On the other hand, in the intake passage 5, there is a gap between the inner wall on the second intake passage 5b side and the valve body 6a of the TGV 6, and the intake air flowing from the upstream of the intake passage 5 to the TGV 6 passes through this gap It passes through the second intake passage 5b to the combustion chamber.

  On the other hand, in the state shown in FIG. 1D, the opening degree of the TGV 6 is maximum, and both the first intake passage 5a and the second intake passage 5b are open. Therefore, the intake air flowing from the upstream of the intake passage 5 to the TGV 6 passes through both the first intake passage 5a and the second intake passage 5b and travels to the combustion chamber.

  Thus, while the TGV 6 is moved, the first intake passage 5a is opened and closed (the opening degree largely changes), while the opening degree of the second intake passage 5b is not changed (not opened and closed). As a result, in the first intake passage 5a, the smaller the opening of the TGV 6, the lower the flow rate of intake air passing through, and in the second intake passage 5b, the smaller the opening of the TGV 6, the higher the flow rate of intake air passing therethrough. Become.

  When the engine load is small and the intake flow rate is small, as shown in FIG. 1C, the degree of opening of the TGV 6 is narrowed, and most of the intake is performed in the second intake passage 5b having a narrower passage width than the first intake passage 5a. Pass it to the side. Thus, the flow velocity of the intake air is increased to flow into the combustion chamber to form a longitudinal vortex (tumble flow) to generate strong turbulence in the combustion chamber to realize rapid combustion of fuel, thereby improving fuel efficiency and combustion stability. Make it possible.

  FIG. 2 is an external view of the partition plate 1, FIG. 2 (a) shows a front view of the partition plate 1, and FIG. 2 (b) is a side view of FIG. FIG. 2C shows a rear view of the partition plate 1. The partition plate 1 is made of resin and has a main body portion 10. The front surface 10a (second surface) of the main body portion 10 faces the second intake passage 5b, and the rear surface 10b (first surface) of the main body portion 10 of the partition plate 1 faces the first intake passage 5a. Face.

  In the main body portion 10, guide wall portions 11 are provided on the right side surface 10c and the left side surface 10d of the main body portion 10 in the width direction (left and right direction in FIG. 2A). The guide wall portion 11 is curved along the inner wall of the head side intake passage 3, and the partition wall plate 1 is fixed in the head side intake passage 3 by the guide wall portion 11 being fitted into the cylinder head.

  As shown in FIGS. 2 (b) and 2 (c), a first reinforcing rib 12 (reinforcing rib) is provided on the back surface 10b, as shown in FIGS. 2 (a) and 2 (b). The second reinforcing rib 13 (reinforcing rib) is provided on the surface 10 a of the partition plate 1.

  The first reinforcing rib 12 protrudes from the back surface 10b toward the first intake passage 5a, and from the upstream side (upper side in FIG. 2C) of the first intake passage 5a on the back surface 10b, the downstream side It extends toward the lower side in FIG. 2 (c).

  Similarly, the second reinforcing rib 13 protrudes from the surface 10a toward the second intake passage 5b, and from the upstream side (upper side in FIG. 2A) of the surface 10a, the second intake passage 5b. It extends toward the downstream side (the lower side in FIG. 2A).

  The partition plate 1 is made of resin, and although it is lighter than metal, its rigidity is low. Here, by providing the first reinforcing rib 12 and the second reinforcing rib 13, weight reduction is achieved while enhancing the rigidity.

  However, since the bulkhead plate 1 is provided in the intake passage 5, the first reinforcement rib 12 and the second reinforcement rib 13 affect the flow of intake air. Then, the influence on the flow of intake air is suppressed by devising the shape and arrangement of the first reinforcing rib 12 and the second reinforcing rib 13.

  Specifically, the first reinforcing rib 12 has a width (length in the left-right direction in FIG. 2C) as the end 12a on the TGV 6 side (the upstream side of the first intake passage 5a) goes to the tip. It has a tapered shape that gradually decreases. In addition, the "end part 12a" means the front-end | tip by the side of TGV6 of the 1st reinforcement rib 12, and its vicinity.

  Similarly, the second reinforcing rib 13 has a width (length in the left-right direction in FIG. 2A) as the end 13a on the TGV 6 side (the upstream side of the second intake passage 5b) goes to the tip. It has a tapered shape that gradually decreases. The “end 13 a” means the tip of the second reinforcing rib 13 on the TGV 6 side and the vicinity thereof.

  Therefore, the intake air flowing from the intake manifold side intake passage 2 into the first intake passage 5a and the second intake passage 5b collides with the end 12a of the first reinforcement rib 12 and the end 13a of the second reinforcement rib 13, The tapered shape also makes it possible to efficiently guide the intake air to the combustion chamber while minimizing the disturbance of the intake flow.

  In particular, in the second intake passage 5b, the intake passes even when the engine load is small and the intake flow rate is throttled. The intake flow in the second intake passage 5b is greatly affected by the disturbance, and if the intake flow is disturbed, it becomes difficult to form a tumble flow in the combustion chamber. By forming the end 13a of the second reinforcing rib 13 in a tapered shape, it is possible to easily form a tumble flow in the combustion chamber.

  Further, each of the first reinforcing rib 12 and the second reinforcing rib 13 is provided at the center in the width direction of the main body portion 10. As described above, the head-side intake passage 3 is in communication with the two intake ports 3a and 3b, and the two intake ports 3a and 3b respectively open to the same combustion chamber.

  Here, by arranging the first reinforcing rib 12 and the second reinforcing rib 13 at the center in the width direction of the main body portion 10, two intake air flowing from the first intake passage 5a and the second intake passage 5b to the combustion chamber can be obtained. A flow that is easy to separate is formed in the intake ports 3a and 3b.

  Further, as shown in FIG. 2B, the second reinforcing rib 13 is provided with a step 13 b. In the step 13b, by standing approximately vertically from the part on the end 13a side in the second reinforcing rib 13, the part on the intake port 3a, 3b side protrudes more than the TGV 6 side. ing. By providing the step 13b, the portion on the end portion 13a side of the second reinforcing rib 13 is lowered to make it difficult to disturb the flow of intake air, and the portion on the air inlet 3a, 3b side of the second reinforcing rib 13 is made high. It is possible to improve the strength.

  FIG. 3 is an explanatory view for explaining the shape of the main body 10 of the partition plate 1. FIG. 3A shows a side view of the partition plate 1 on the same side as FIG. 2B. However, in FIG. 3A, the partition plate 1 of FIG. 2B is shown rotated about 90 degrees counterclockwise.

  Moreover, in FIG. 3A, the right side surface 10c of the main body portion 10 is shown by cross hatching. In FIG. 3A, the first reinforcing rib 12 protrudes above the right side surface 10c, and the second reinforcing rib 13 protrudes below the right side surface 10c. Further, in FIG. 3A, the guide wall portion 11 is shown between the right side surface 10c.

  And as shown to Fig.3 (a), as for the end by the side of air intake 3a, 3b, the 1st reinforcement rib 12 and the 2nd reinforcement rib 13 are gradually reduced in projection height as it goes to the tip, respectively It is part 12c and 13c.

  Further, the gradually decreasing portion 13 c of the second reinforcing rib 13 has a gentler inclination than the gradually decreasing portion 12 c of the first reinforcing rib 12. In other words, the gradually decreasing portion 12c has a shape that becomes steeply lower toward the intake ports 3a and 3b from a position closer to the intake ports 3a and 3b (right side in FIG. 3A) than the gradual reduction portion 13c. It is.

  As described above, in the second intake passage 5b, the intake air passes even when the engine load is small and the intake flow rate is reduced, and the influence of disturbance is large in this intake flow. By providing the second reinforcement rib 13 with a gradually decreasing portion 13c that is gentler than the gradually decreasing portion 12c of the first reinforcement rib 12, the flow of intake air on the second intake passage 5b side is further less likely to be disturbed. On the other hand, the gradually decreasing portion 12 c of the first reinforcing rib 12 is more rigid than the gradually decreasing portion 13 c, and the strength of the partition plate 1 can be improved.

  As shown to Fig.3 (a), the inclined part 10f is formed in the edge part 10e by the side of inlet port 3a, 3b among the main-body parts 10 of the partition plate 1. As shown in FIG. The inclined portion 10 f inclines toward the first intake passage 5 a as it goes to the tip of the end 10 e.

  As described above, in the second intake passage 5b, the intake air passes even when the engine load is small and the intake flow rate is reduced, and the influence of the intake turbulence on the formation of the tumble flow is large. By providing the inclined portion 10 f on the second intake passage 5 b side at the end 10 e of the main body 10, the intake air flowing along the surface 10 a on the second intake passage 5 b side is separated from the end 10 e. It is easy to extend to the intake passage 5a side. As a result, the flow is less likely to be disturbed in the head side intake passage 3, and the tumble flow can be strengthened.

  Further, since the inclined portion 10f is curved toward the first intake passage 5a as it goes toward the tip, the flow of intake air smoothly spreads to the first intake passage 5a side, so that disturbance is more difficult to occur. ing.

  FIG. 3 (b) is an explanatory view for explaining the molding of the main body 10. As described above, the main body portion 10 is made of resin, and is molded by injecting a liquid resin into the split molds 14a and 14b which can be divided into two. In FIG. 3B, when molding the main body 10, a part on the end 10e side in a cross section obtained by cutting the split molds 14a and 14b at a position where the right side surface 10c of the main body 10 is visible is extracted.

  As shown in FIG. 3B, when the resin is molded with the split molds 14a and 14b, an edge 10g is formed in the portion of the main body 10 that abuts against the boundary 14d of the split molds 14a and 14b during molding Be done. Here, the curved portion 14c is provided in the split mold 14a so as to form the inclined portion 10f on the second intake passage 5b side (upper side in FIG. 3B) of the end portion 10e of the main body portion 10 At the same time, the edge 10g is designed to be located on the side of the first intake passage 5a of the end 10e.

  Therefore, it is possible to strengthen the tumble flow without disturbing the flow of intake air by the edge 10 g while suppressing the cost for molding by molding the main body 10 using the split molds 14 a and 14 b.

  Although the embodiment described above describes the case where the first reinforcing rib 12 and the second reinforcing rib 13 are provided, only one of the first reinforcing rib 12 and the second reinforcing rib 13 may be provided. However, in particular, by providing the second reinforcing rib 13 and making the end of the second reinforcing rib 13 tapered, it is difficult to disturb the flow of intake air passing when the engine load is small and the intake flow rate is throttled, It is possible to strengthen the tumble flow.

  Further, in the embodiment described above, the case where the step 13 b is provided in the second reinforcing rib 13 has been described, but the step 13 b is not an essential configuration.

  Moreover, although the case where the gradual reduction parts 12c and 13c were provided in the 1st reinforcement rib 12 and the 2nd reinforcement rib 13 was demonstrated in embodiment mentioned above, the gradual reduction parts 12c and 13c are not an essential structure.

  In the embodiment described above, the first reinforcing rib 12 and the second reinforcing rib 13 are provided at the center in the width direction of the main body portion 10, but the first reinforcing rib 12 and the second reinforcing rib 13 , May be provided at a position other than the center in the width direction.

  Moreover, although the case where the inclination part 10f was provided in the edge part 10e of the main-body part 10 was demonstrated in embodiment mentioned above, the inclination part 10f is not an essential structure.

  In the embodiment described above, although the case where the inclined portion 10f has a curved surface shape has been described, the shape of the inclined portion 10f is not limited to the curved surface shape, and may be, for example, a tapered shape or a step may be provided. Good.

  In the embodiment described above, the main body portion 10 is molded such that the edge 10g formed in contact with the boundary portion 14d of the two split molds 14a and 14b is positioned on the back surface 10b side of the main body portion 10. However, the main body 10 may be molded by means other than the split mold.

  While the preferred embodiments of the present invention have been described with reference to the accompanying drawings, it is a matter of course that the present invention is not limited to the above-described embodiments, and various modifications in the scope described in the claims. It goes without saying that the modifications also fall within the technical scope of the present invention.

  The present invention can be used for a partition plate that divides an intake passage of an engine.

1 Partition plate 2 Intake side intake passage (intake passage)
3 Head side intake passage (intake passage)
3a, 3b Intake port (intake port)
5 intake passage 5a first intake passage 5b second intake passage 6 TGV (open / close valve)
10 body portion 10a surface (second surface)
10b Rear (first side)
10e end portion 10f inclined portion 10g edge 12 first reinforcing rib (reinforcing rib)
12a end 12c gradually decreasing portion 13 second reinforcing rib (reinforcing rib)
13a end 13b step 13c gradually decreasing portions 14a, 14b split type

Claims (5)

Is provided between the opening and closing valve and the combustion chamber, the air intake passage, a first intake passage is opened and closed by the opening and closing valve, a partition wall plate that partitions into the second intake passage is not opened and closed by the opening and closing valve,
A resin main body portion fixed in the intake passage and dividing the intake passage into the first intake passage and the second intake passage;
It is provided on both the first surface facing the first intake passage and the second surface facing the second intake passage , or at least on the second surface , of the main body, the opening and closing A reinforcing rib extending from the valve side to the intake port side;
Equipped with
The reinforcing rib provided on at least the second surface is
A step is formed by projecting the intake port side more largely to the end side of the on-off valve side,
The partition plate characterized in that the end on the on-off valve side has a tapered shape whose width gradually decreases toward the tip. A partition plate which is provided between an open / close valve and a combustion chamber and divides an intake passage into a first intake passage opened and closed by the open / close valve and a second intake passage not opened and closed by the open / close valve,
A resin main body portion fixed in the intake passage and dividing the intake passage into the first intake passage and the second intake passage;
It is provided on both the first surface of the main body facing the first intake passage and the second surface facing the second intake passage, and extends from the on-off valve side to the intake port side Reinforcement ribs,
Equipped with
The reinforcing rib is
The end on the on-off valve side has a tapered shape whose width gradually decreases toward the tip,
It is provided on both the first surface facing the first intake passage and the second surface facing the second intake passage, and the end on the intake port side has a protruding height toward the tip end Is gradually decreasing, and
The decreasing portions of the second reinforcement rib provided on the surface, the first than decreasing portions of the reinforcing ribs provided on the surface, you wherein the slope is gentle septal wall plate. The said reinforcement rib is provided in the center of the width direction of the said main-body part, The partition plate of Claim 1 or 2 characterized by the above-mentioned. Wherein an end portion of the intake port side of the second face, from claim 1, wherein the inclined portion is provided which is inclined toward the first intake passage side toward the distal end of the 3 The partition plate according to any one of the above. The partition plate according to claim 4 , wherein the inclined portion has a curved shape .

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