JP2018021535A - Bulkhead plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress positional deviation of a guide part to a plate part.SOLUTION: A bulkhead plate 1 is arranged in an intake flow passage of an engine, and is configured to section the intake flow passage. The bulkhead plate includes, for example, a resin guide part 1b fitted to an inner wall groove provided on the inner wall of intake flow passage, and, for example, a metal plate 1a that has a side part 1c buried inside the guide part 1, and a positioning part 1g comprising a cutout or open hole provided at the side part 1c. Upon molding the guide part 1b, the positioning part 1g is configured to perform positioning in a width direction.SELECTED DRAWING: Figure 7

Description

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

  Conventionally, as in the engine described in Patent Document 1, a partition plate that divides the intake flow path into two flow paths (first flow path and second flow path) is provided. For example, a technique for increasing the flow rate of intake air flowing into the combustion chamber from the second flow path and forming a strong tumble flow in the combustion chamber by reducing the opening of the partitioned first flow path with a TGV (Tumble Generation Valve). Has been developed.

  In order to fix such a partition plate to the intake flow path, an inner wall groove may be provided on the inner wall of the intake flow path, and a guide portion that fits into the inner wall groove may be provided on the partition plate. The guide portions are provided on both sides in the width direction of the flow path in the main body (plate portion) of the partition plate.

JP, 2014-101774, A

  Of the above partition plates, the plate portion may be formed of metal, for example, and the guide portion may be formed of resin. When manufacturing this partition plate, a metal plate portion is placed in a mold, and a resin is poured into the guide portion to form both sides of the plate portion. However, for example, when the length of the flow direction of the flow path of the plate portion and the guide portion is approximately the same, positioning in the width direction perpendicular to the flow direction is not performed among the plate portions installed in the mold. In this case, the guide portion is displaced from the intended position with respect to the plate portion.

  Then, in view of such a subject, this invention aims at providing the partition plate which can suppress the position shift of the guide part with respect to a plate part.

  In order to solve the above problems, the partition plate of the present invention, which is arranged in the intake passage of the engine and divides the intake passage, has a guide portion that fits into an inner wall groove provided on the inner wall of the intake passage, It has a side part embedded in the inside of a guide part, and is provided with the plate part by which the positioning part which consists of a notch or a penetration hole was provided in the side part.

  The guide part may further include a plurality of lightening parts, and the opening part that exposes the positioning part among the guide parts may be formed to overlap with one of the plurality of lightening parts.

  The opening part which exposes a positioning part among guide parts may be comprised by the hole which becomes so wide that it separates from a positioning part.

  According to the present invention, it is possible to suppress displacement of the guide portion with respect to the plate portion.

It is explanatory drawing for demonstrating a partition plate. It is explanatory drawing for demonstrating opening / closing operation | movement of TGV. It is the III-III sectional view taken on the line of Fig.2 (a). It is a figure for demonstrating a partition plate. It is a 1st figure for demonstrating shaping | molding of a guide part. It is a 2nd figure for demonstrating shaping | molding of a guide part. It is a figure for demonstrating an opening part.

  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 the partition plate 1. FIG. 1A shows a front view of a partition plate 1 arranged in an intake air flow path 2 of the engine, and FIG. 1B shows I (b) -I in FIG. (B) A line cross section is shown.

  The intake flow path 2 is a flow path that communicates with the combustion chamber 3, and the intake port 4 that opens to the combustion chamber 3 in the intake flow path 2 is connected to the combustion chamber 3 by the intake valve 5 shown in FIG. The communication part of is opened and closed. The intake air flowing into the intake passage 2 is guided into the combustion chamber 3 from the intake port 4 when the intake valve 5 is opened.

  The partition plate 1 has a plate-like plate portion 1a that is a main body. Guide portions are provided on both sides of the plate portion 1a in the width direction of the intake flow path 2 (plate portion 1a) (the vertical direction in FIG. 1A and the longitudinal direction in the cross section perpendicular to the flow of intake air). 1b is provided. The partition plate 1 is fixed inside the intake flow path 2 by the guide portion 1b. The guide part 1b will be described in detail later.

  The partition plate 1 divides the intake flow path 2 along the flow direction of the intake air to form a first flow path 2a and a second flow path 2b. That is, the partition plate 1 partitions the intake flow path 2 into the first flow path 2a and the second flow path 2b.

  A TGV 6 (Tumble Generation Valve) is disposed upstream of the partition plate 1 in the intake flow path 2 and opens and closes the first flow path 2a.

  FIG. 2 is an explanatory diagram for explaining the opening / closing operation of the TGV 6, and shows the vicinity of the partition plate 1 and the TGV 6 in FIG. 1 (b). As shown in FIG. 2, the intake flow path 2 is formed by an intake manifold 7, a support member 8, and an intake port 4 of the cylinder head 9.

  Specifically, one end 7a of the intake manifold 7 and one end 8a of the support member 8 are connected, and the flow path in the intake manifold 7 and the flow path in the support member 8 communicate with each other. Further, the other end 8 b of the support member 8 and the cylinder head 9 are connected, and the flow path in the support member 8 and the intake port 4 of the cylinder head 9 communicate with each other. Thus, the intake flow path 2 is formed by the flow path in the intake manifold 7, the flow path in the support member 8, and the intake port 4.

  The partition plate 1 is disposed inside the intake port 4 in the intake flow path 2 and divides the intake port 4 into a first flow path 2a and a second flow path 2b. The TGV 6 includes a shaft 6a and a valve body portion 6b. The shaft 6a is inserted into the inner wall of the support member 8 at both ends, is connected to a motor device (not shown), and rotates by receiving the power of the motor device.

  The valve body 6b extends in the depth direction in FIG. 2 (vertical direction in FIG. 1A) in the flow path in the support member 8 of the intake flow path 2. Moreover, the valve body 6b is arrange | positioned rather than the partition plate 1 at the 1st flow path 2a side, as shown in FIG. The valve body 6b rotates around the axis of the shaft 6a together with the shaft 6a to vary the opening degree of the first flow path 2a.

  In the state shown in FIG. 2A, the opening of the TGV 6 is the maximum. In this case, the valve body portion 6b extends along the flow direction of the intake air, so that the intake air flowing from the upstream side of the intake flow path 2 to the TGV 6 is not blocked by the valve body portion 6b, and the first flow It passes through both the path 2a and the second flow path 2b toward the combustion chamber 3.

  On the other hand, in the closed state shown in FIG. 2 (b), the opening of the TGV 6 is minimized, and the first flow path 2a is almost closed by the valve body 6b of the TGV 6, so that most of the intake air passes through the second flow path 2b. Pass through to the combustion chamber 3.

  When the engine load is small and the intake flow rate is small, as shown in FIG. 2 (b), the opening degree of the first flow path 2a is reduced, and most of the intake air is passed through the second flow path 2b. In this way, by causing the intake air with an increased flow velocity to flow into the combustion chamber 3, a strong vertical vortex flow (tumble flow) is formed in the combustion chamber 3 to realize rapid fuel combustion, thereby improving fuel efficiency and combustion stability. Make it possible.

  3 is a cross-sectional view taken along line III-III in FIG. As shown in FIG. 3, an inner wall groove 4 b is formed in the inner wall 4 a of the intake port 4 of the cylinder head 9. The inner wall grooves 4b are located at both ends in the width direction of the intake port 4 (longitudinal direction in the cross section perpendicular to the flow of intake air (left and right direction in FIG. 3)). A guide portion 1b is fixed to the side portion 1c of the plate portion 1a of the partition plate 1, and the guide portions 1b are inserted into and fitted into the inner wall grooves 4b. Thus, the partition plate 1 is fixed inside the intake port 4 (intake passage 2).

  4A and 4B are diagrams for explaining the partition plate 1. FIG. 4A shows a perspective view of the partition plate 1, and FIG. 4B shows a perspective view of the plate portion 1a. As described above, the partition plate 1 includes the plate portion 1a and the guide portion 1b. The plate portion 1a is made of metal, and the guide portion 1b is made of resin.

  In addition, a thinned portion 1d is formed in the guide portion 1b. The lightening portions 1d are grooves (dents) provided on the surface 1e of the guide portion 1b, and a plurality of the lightening portions 1d are provided separately in the flow direction of the intake flow path 2 (the arrow direction in FIG. 4A). By providing the lightening portion 1d, the capacity of the resin can be suppressed to reduce the weight and cost, and deformation due to shrinkage when the resin is solidified can be suppressed.

  When the partition plate 1 is manufactured, first, the plate portion 1a is formed, and then the guide portion 1b is formed by molding a resin on the side portion 1c of the plate portion 1a. The side part 1c is embedded in the guide part 1b. Moreover, the notches formed at the four corners of the plate portion 1a are also embedded in the guide portion 1b.

  Since the plate portion 1a and the guide portion 1b are made of different materials, as shown in FIG. 4B, the side portion 1c of the plate portion 1a is fixed so that the guide portion 1b is fixed to the plate portion 1a without slipping. The biting groove 1f is formed in the.

  The biting groove 1f is a groove (notch) that is recessed from the side portion 1c toward the center in the width direction, and is separated in the flow direction of the intake flow path 2 (indicated by an arrow in FIG. 4B). A plurality (three in each case) are provided on the side portions 1c on both sides. By providing the biting groove 1f, the resin enters the biting groove 1f and is solidified at the time of molding. Therefore, the resin and the biting groove 1f are engaged with each other, and the sliding of the guide portion 1b with respect to the plate portion 1a can be avoided.

  A positioning portion 1g is formed on the side portion 1c of the plate portion 1a. The positioning portion 1g is a roughly semicircular groove (notch), and is positioned between adjacent biting grooves 1f. The positioning part 1g is used when the plate part 1a is installed in a mold for molding the guide part 1b. Hereinafter, the function of this positioning part 1g is demonstrated.

  FIG. 5 is a first diagram for explaining the molding of the guide portion 1b. 5A shows a mold A of the guide portion 1b, and FIG. 5B shows a view in which the plate portion 1a is installed on the mold A. FIG. FIG. 6 is a second view for explaining the molding of the guide portion 1b. 6A to 6C show a VI-VI cross section of FIG. 5B in a state where the mold A and the mold B are combined with the plate portion 1a interposed therebetween. However, the manufacturing process proceeds in the order of FIGS. 6A, 6B, and 6C.

  The guide portion 1b is molded by pouring resin between two molds A and B (see FIG. 6). As shown in FIG. 5A, a groove (shown by cross-hatching) corresponding to the half shape of the partition plate 1 is formed in the mold A. Although illustration is omitted here, a groove corresponding to the shape of the remaining half of the partition plate 1 is also formed in the mold B.

  First, as shown in FIG. 5B, the plate portion 1a is installed on the mold A. At this time, the plate part 1a is positioned by the groove | channel of the type | mold A about the up-down direction in FIG.5 (b), and a movement is controlled. On the other hand, the side portion 1c of the plate portion 1a is separated from the groove of the mold A, and the plate portion 1a moves without being positioned in the left-right direction in FIG.

  For example, when the plate portion 1a extends longer in the flow direction of the intake flow path 2 than the guide portion 1b as shown by a broken line in FIG. 5B, in FIG. A step Ab is formed when the upper side Aa of the groove protrudes in the vertical direction. The level difference Ab makes it possible to position the plate portion 1a in the left-right direction.

  However, in this embodiment, as shown in FIGS. 2 and 4, the upstream end face and the downstream end face of the plate portion 1a are flush with the guide portion 1b without protruding. Yes. However, as shown in FIG. 2, in the guide portion 1b, the end face on the upstream side of the flow of intake air is inclined with respect to the thickness direction of the guide portion 1b. The portion corresponding to the guide portion 1b of the groove of the mold A is protruded upward in FIG. 5 (b) from the plate portion 1a by this inclination.

  Thus, it is advantageous to form a tumble flow without disturbing the flow of the intake air when the plate portion 1a is flush with the guide portion 1b. Therefore, in this embodiment, instead of causing the plate portion 1a to protrude from the guide portion 1b, a positioning portion 1g is provided on the plate portion 1a.

  First, as shown to Fig.6 (a), the type | mold A and the type | mold B are match | combined on both sides of the plate part 1a. At this time, a positioning hole Ba is formed in the mold B at a position facing the positioning portion 1g. Then, as shown in FIG. 6B, the positioning pin C is inserted into the positioning hole Ba. The positioning pin C has a tapered shape in which the outer diameter decreases toward the tip side. The tip of the positioning pin C is inserted into the positioning portion 1g. Thus, the plate portion 1a is positioned in the left-right direction in FIG. Alternatively, the positioning pin C may be inserted in advance into the positioning hole Ba and protrude from the mold B, and the plate portion 1a may be attached to the mold B. In this case, after the plate portion 1a is positioned by the tip of the positioning pin C and the positioning portion 1g, the die A is matched with the die B.

  In this way, the mold A and the mold B are combined with the plate portion 1a interposed therebetween, and the resin is poured between the mold A and the mold B in a state where the plate portion 1a is positioned by the positioning pin C to be solidified. By doing so, the guide portion 1b is molded. An opening 1h (see FIG. 7) for exposing the positioning portion 1g is formed in the guide portion 1b thus molded.

  FIG. 7 is a view for explaining the opening 1h. FIG. 7A shows a front view of the partition plate 1, and FIG. 7B shows a VII (b) of FIG. ) -VII (b) sectional view is shown.

  As shown in FIGS. 7A and 7B, the opening 1h opens to the surface 1e of the guide 1b and extends to the side 1c of the plate 1a embedded in the guide 1b. It is a hole. The positioning portion 1g formed on the side portion 1c is exposed to the outside through the opening 1h.

  Moreover, as shown in FIG.7 (b), the opening part 1h is so wide that it separates from the positioning part 1g. Therefore, the positioning pin C can be easily pulled out from the resin when the guide portion 1b is molded.

  The opening 1h is formed so as to overlap with one of the plurality of lightening portions 1d. That is, the opening 1h also functions as the thinned portion 1d. Therefore, compared with the case where the opening 1h is formed at a different position from the thinned portion 1d, the plate portion 1a is formed by the positioning portion 1g while avoiding a situation in which the thickness is partially reduced and the strength is insufficient. Positioning becomes possible.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Is done.

  For example, in the embodiment described above, the case where the positioning portion 1g is a notch has been described, but a through-hole penetrating the plate portion 1a in the plate thickness direction may be used as the positioning portion 1g.

  Further, in the above-described embodiment, the case where the lightening portion 1d is provided and the opening portion 1h is formed so as to overlap the lightening portion 1d has been described. However, the lightening portion 1d is not an essential configuration, and the opening portion 1h is not the meat. You may form it in a different position from the extraction part 1d.

  In the above-described embodiment, the case where the opening 1h becomes wider as it is separated from the positioning portion 1g has been described. However, as long as the positioning pin C is removed, the opening 1h may have any shape.

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

DESCRIPTION OF SYMBOLS 1 Partition plate 1a Plate part 1b Guide part 1c Side part 1d Thickening part 1g Positioning part 1h Opening part 2 Intake flow path 2a First flow path 2b Second flow path 4a Inner wall 4b Inner wall groove

Claims (3)

A partition plate arranged in the intake air flow path of the engine and dividing the intake flow path,
A guide portion that fits into an inner wall groove provided on the inner wall of the intake flow path;
A plate portion having a side portion embedded inside the guide portion, and a positioning portion including a notch or a through hole provided on the side portion;
A partition plate, comprising: Further comprising a plurality of lightening portions provided in the guide portion,
2. The partition plate according to claim 1, wherein, of the guide portions, an opening portion that exposes the positioning portion is formed so as to overlap one of the plurality of lightening portions.   3. The partition plate according to claim 1, wherein an opening that exposes the positioning portion of the guide portion is configured by a hole that becomes wider as the distance from the positioning portion increases.

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