JP2016191318A - Partition wall plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress turbulence of intake air.SOLUTION: A partition wall plate 1 is provided between an opening and closing valve and a combustion chamber, and partitions an intake passage into a first intake passage which is opened/closed by the opening and closing valve, and a second intake passage which is not opened/closed by the opening and closing valve. The partition wall plate 1 includes: a resin body part 10 fixed in the intake passage and partitioning the intake passage into the first intake passage and the second intake passage; and a reinforcement rib (first reinforcement rib 12, a second reinforcement rib 13) provided on one or both of a first surface (back surface 10b) facing the first intake passage and a second surface (front surface 10a) facing the second intake passage of the body part, and extending from the opening and closing valve side to an intake port side. Ends 12a, 13a of the reinforcement rib on the opening and closing valve side have tapered shapes of which width is gradually reduced toward a distal end.SELECTED DRAWING: Figure 2

Description

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

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

JP 2002-70566 A JP 2007-327487 A

  By the way, in order to reduce the weight and reduce the cost, the development of switching the material constituting the partition plate from metal to resin is underway. Since the resin partition plate is lower in rigidity than the metal partition plate, it is necessary to provide reinforcing ribs. It is desirable that the reinforcing ribs have a shape that has a great influence on the flow of intake air and does not disturb the flow of intake air.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a partition plate that hardly disturbs the flow of intake air.

  In order to solve the above-described problems, a partition plate according to the present invention is provided between an opening / closing valve and a combustion chamber, and a first intake passage that is opened and closed by the opening / closing valve and a second opening / closing valve that is not opened / closed by the opening / closing valve. A partition plate that divides into an intake passage, and is fixed in the intake passage, and is made of a resin main body that partitions the intake passage into a first intake passage and a second intake passage, and of the main body portion, the first intake passage A reinforcing rib provided on one or both of the first surface facing and the second surface facing the second intake passage and extending from the on-off valve side to the intake port side. Is characterized in that the end on the open / close valve side has a tapered shape with a width gradually decreasing toward the tip.

  The reinforcing rib may be provided at least on the second surface facing the second intake passage.

  The reinforcing rib provided on the second surface may be provided with a step formed by projecting the intake port side larger than the end side on the opening / closing valve side.

  The reinforcing rib 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 protrudes toward the tip. It is a gradually decreasing portion whose height decreases, and the gradually decreasing portion of the reinforcing rib provided on the second surface is less inclined than the gradually decreasing portion of the reinforcing rib provided on the first surface. Good.

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

  The end portion on the intake port side of the second surface may be provided with an inclined portion that is inclined toward the first intake passage side toward the tip.

  The inclined portion may have a curved surface shape.

  The main body is molded by a split mold that can be divided into a plurality of parts, and an edge formed in contact with the boundary part of the plurality of split molds at the time of molding faces the first intake passage among the ends. It may be located on the first surface side.

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

It is explanatory drawing for demonstrating the arrangement | positioning site | 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 shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is an explanatory diagram for explaining an arrangement site of the partition plate 1. FIG. 1 (a) shows a front view of the partition plate 1 arranged 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 the 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. Each intake port 3a, 3b is opened and closed by an intake valve 4 shown in FIG. In FIG. 1A, 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 guided into the combustion chamber from 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. As shown in FIG. 1 (b), the partition plate 1 has an intake passage 5 (intake manifold side intake passage 2 and head side intake passage 3) through which intake air flows, a first intake passage 5a and a second intake passage 5b. Partition.

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

  1 (c) and 1 (d), the dashed-dotted line portion in FIG. 1 (b) is shown enlarged. However, FIG. 1C shows a state where the TGV 6 is closed, and FIG. 1D shows a state where the TGV 6 is opened.

  The TGV 6 has a valve body 6a. As shown in FIGS. 1C and 1D, the valve body 6a has a generally flat plate shape, and a shaft 6b is fixed to one surface. When the shaft 6b is rotated by a motor (not shown), the valve body 6a is rotated, and the first intake passage 5a is opened and closed.

  In the state shown in FIG. 1C, the opening of the TGV 6 is minimum, and the first intake passage 5a 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 and goes to the combustion chamber.

  On the other hand, in the state shown in FIG. 1D, the opening 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 that has flowed 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 toward the combustion chamber.

  As described above, when the TGV 6 is moved, the first intake passage 5a is opened and closed (the opening degree is greatly changed), while the opening degree of the second intake passage 5b is not changed (not opened and closed). As a result, the first intake passage 5a decreases as the opening degree of the TGV 6 decreases, and the intake air flow rate passing through the second intake passage 5b decreases. As the opening degree of the TGV 6 decreases, the intake flow rate passing through the first intake passage 5a increases. Become.

  When the engine load is small and the intake flow rate is small, as shown in FIG. 1 (c), the opening of the TGV 6 is narrowed and most of the intake air is narrowed in the second intake passage 5b, which is narrower than the first intake passage 5a. Let go to the side. In this way, the flow velocity of the intake air is increased and flows into the combustion chamber to form a longitudinal vortex (tumble flow), and strong turbulence is generated in the combustion chamber to realize rapid fuel combustion, improving fuel economy and improving combustion stability. Is possible.

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

  Guide wall portions 11 are respectively provided on the right side surface 10c and the left side surface 10d of the main body portion 10 in the width direction of the main body portion 10 (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 fitting the guide wall portion 11 into the cylinder head.

  As shown in FIGS. 2 (b) and 2 (c), the back surface 10b is provided with first reinforcing ribs 12 (reinforcing ribs), as shown in FIGS. 2 (a) and 2 (b). In addition, a 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 the back surface 10b is located upstream from the upstream side (the upper side in FIG. 2C) of the first intake passage 5a ( It extends toward the lower side in FIG.

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

  The partition plate 1 is made of a resin and is lighter than a metal but has a low rigidity. Here, by providing the first reinforcing rib 12 and the second reinforcing rib 13, weight reduction is achieved while increasing rigidity.

  However, since the partition plate 1 is provided in the intake passage 5, if the first reinforcing rib 12 and the second reinforcing rib 13 are provided, the flow of intake air is affected. Therefore, 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 portion 12a on the TGV6 side (upstream side of the first intake passage 5a) approaches the tip. The tapering shape gradually decreases. The “end portion 12a” means the tip of the first reinforcing rib 12 on the TGV6 side and the vicinity thereof.

  Similarly, the second reinforcing rib 13 has a width (length in the left-right direction in FIG. 2A) as the end portion 13a on the TGV6 side (upstream side of the second intake passage 5b) approaches the tip. The tapering shape gradually decreases. The “end portion 13a” means the tip of the second reinforcing rib 13 on the TGV6 side and the vicinity thereof.

  Therefore, the intake air flowing into the first intake passage 5a and the second intake passage 5b from the intake manifold side intake passage 2 collides with the end portion 12a of the first reinforcement rib 12 and the end portion 13a of the second reinforcement rib 13, Because of the tapered shape, the intake air flow can be efficiently guided to the combustion chamber while minimizing the disturbance of the intake air flow.

  In particular, the second intake passage 5b allows intake air to pass even when the engine load is small and the intake flow rate is throttled. The influence of the turbulence is large in the intake air flow in the second intake passage 5b, and if the turbulence occurs in the intake air flow, a tumble flow is hardly formed in the combustion chamber. By making the end portion 13a of the second reinforcing rib 13 into a tapered shape, it becomes possible to easily form a tumble flow in the combustion chamber.

  The first reinforcing rib 12 and the second reinforcing rib 13 are both provided at the center in the width direction of the main body 10. As described above, the head-side intake passage 3 communicates with the two intake ports 3a and 3b, and the two intake ports 3a and 3b open to the same combustion chamber.

  Here, by arranging the first reinforcing rib 12 and the second reinforcing rib 13 in the center in the width direction of the main body 10, two intake airs from the first intake passage 5 a and the second intake passage 5 b to the combustion chamber A flow that is easily separated 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 13b. At the level difference 13b, the second reinforcing rib 13 is erected almost vertically from the portion on the end portion 13a side, so that the portion on the intake port 3a, 3b side protrudes larger than the TGV6 side. ing. By providing the step 13b, the portion on the end 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 inlet 3a, 3b side of the second reinforcing rib 13 is made high. Thus, the strength can be improved.

  FIG. 3 is an explanatory diagram 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.3 (a), the right side surface 10c of the main-body part 10 is shown by cross hatching. In FIG. 3A, the first reinforcing rib 12 protrudes upward from the right side surface 10c, and the second reinforcing rib 13 protrudes downward from the right side surface 10c. Further, in FIG. 3A, the guide wall portion 11 is shown between the right side surfaces 10c.

  As shown in FIG. 3 (a), the first reinforcing rib 12 and the second reinforcing rib 13 are gradually reduced such that the projecting heights of the end portions on the side of the intake ports 3a and 3b decrease toward the tip. It is part 12c, 13c.

  Further, the gradually decreasing portion 13 c of the second reinforcing rib 13 is inclined more gradually than the gradually decreasing portion 12 c of the first reinforcing rib 12. In other words, the gradually decreasing portion 12c is steeperly lower than the gradually decreasing portion 13c from a position closer to the intake port 3a, 3b side (right side in FIG. 3A) toward the intake port 3a, 3b side. It is.

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

  As shown in FIG. 3A, an inclined portion 10f is formed at an end portion 10e on the intake port 3a, 3b side of the main body portion 10 of the partition plate 1. The inclined portion 10f is inclined toward the first intake passage 5a toward the tip of the end portion 10e.

  As described above, the intake air passes through the second intake passage 5b even when the engine load is small and the intake flow rate is restricted, and the influence of the intake turbulence on the formation of the tumble flow is large. By providing the inclined portion 10f on the second intake passage 5b side at the end portion 10e of the main body 10, the first intake air flowing along the surface 10a on the second intake passage 5b side is separated from the end portion 10e. It is easy to expand 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, the inclined portion 10f is curved toward the first intake passage 5a toward the tip, and the flow of the intake air smoothly spreads toward the first intake passage 5a, so that the disturbance is less likely to occur. ing.

  FIG. 3B is an explanatory diagram for explaining the molding of the main body 10. As described above, the main body 10 is made of resin, and is molded by injecting a liquid resin into the split molds 14a and 14b that can be divided into two. In FIG. 3B, a part of the end portion 10e side is extracted and shown 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 portion 10 can be seen when the main body portion 10 is molded.

  As shown in FIG. 3 (b), when resin is molded with the split molds 14a and 14b, an edge 10g is formed in a portion of the main body 10 that contacts the boundary portion 14d of the split molds 14a and 14b at the time of molding. Is done. Here, a curved portion 14c is provided in the split mold 14a to form the inclined portion 10f on the second intake passage 5b side (the 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 first intake passage 5a side in the end portion 10e.

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

  In the embodiment described above, the case where the first reinforcing rib 12 and the second reinforcing rib 13 are provided has been described, but only one of the first reinforcing rib 12 and the second reinforcing rib 13 may be provided. However, in particular, the second reinforcing rib 13 is provided, and the tip of the second reinforcing rib 13 is tapered, so that it is difficult to disturb the flow of the intake air that passes when the engine load is small and the intake flow rate is throttled. It becomes possible to strengthen the tumble flow.

  Moreover, although the case where the level | step difference 13b was provided in the 2nd reinforcement rib 13 was demonstrated in embodiment mentioned above, the level | step difference 13b is not an essential structure.

  In the above-described embodiment, the case where the first reinforcing rib 12 and the second reinforcing rib 13 are provided with the gradually decreasing portions 12c and 13c has been described. However, the gradually decreasing portions 12c and 13c are not essential components.

  In the above-described embodiment, the case where the first reinforcing rib 12 and the second reinforcing rib 13 are provided at the center in the width direction of the main body 10 has been described. However, the first reinforcing rib 12 and the second reinforcing rib 13 are not provided. Alternatively, it may be provided at a position other than the center in the width direction.

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

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

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

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiments, and various modifications within the scope described in the claims. Needless to say, the modified examples also belong to the technical scope of the present invention.

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

1 Bulkhead plate 2 Intake manifold 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 Main body 10a Surface (second surface)
10b Rear surface (first surface)
10e End portion 10f Inclined portion 10g Edge 12 First reinforcing rib (reinforcing rib)
12a End portion 12c Gradually decreasing portion 13 Second reinforcing rib (reinforcing rib)
13a End 13b Step 13c Gradually decreasing part 14a, 14b Split type

Claims (8)

A partition plate provided between the on-off valve and the combustion chamber and partitioning the intake passage into a first intake passage that is opened and closed by the on-off valve and a second intake passage that is not opened and closed by the on-off valve;
A resin main body fixed in the intake passage and partitioning the intake passage into the first intake passage and the second intake passage;
Of the main body, an intake port is provided on one or both of the first surface facing the first intake passage and the second surface facing the second intake passage from the open / close valve side. Reinforcing ribs extending to the side,
With
The reinforcing rib is
The partition plate according to claim 1, wherein an end of the opening / closing valve has a tapered shape with a width gradually decreasing toward the tip.   The partition plate according to claim 1, wherein the reinforcing rib is provided at least on a second surface facing the second intake passage.   The reinforcing rib provided on the second surface is provided with a step formed by projecting the intake port side larger than the end portion side of the opening / closing valve side. The partition plate according to claim 2. The reinforcing ribs are 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 is at the tip. It is a gradual decreasing part where the protruding height becomes lower as you go,
The gradually decreasing portion of the reinforcing rib provided on the second surface has a gentler slope than the gradually decreasing portion of the reinforcing rib provided on the first surface. Bulkhead plate.   The partition plate according to any one of claims 1 to 4, wherein the reinforcing rib is provided at a center in a width direction of the main body portion.   The end portion on the intake port side of the second surface is provided with an inclined portion that is inclined toward the first intake passage side toward the tip. The partition plate of any one of Claims.   The partition plate according to claim 6, wherein the inclined portion has a curved surface shape. The main body is molded by a split mold that can be divided into a plurality of parts,
In the main body portion, an edge formed in contact with a boundary portion of a plurality of split molds at the time of molding is located on a first surface side facing the first intake passage among the end portions. The partition plate according to claim 6 or 7.

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