阅读说明：本技术 用于内燃机的进气管 (Air inlet pipe for internal combustion engine ) 是由 木村龙介 大野知世 于 2019-05-13 设计创作，主要内容包括：用于内燃机的进气管包括由纤维成型体制成的管状侧壁。侧壁包括在侧壁的周向上彼此独立的多个分割体。凸缘分别从各分割体的周向上的相反端向外突出。各凸缘均包括低压缩部和高压缩部,高压缩部位于低压缩部的内侧。各分割体的各凸缘均与对应分割体的凸缘中的一个凸缘配对并接触。由塑性材料制成的结合部配置于各对凸缘的彼此接触的部分,该部分位于高压缩部的外侧,结合部围绕该部分并使该部分彼此结合。(Air inlet pipe for internal combustion engine includes the tubular sidewall made of fiber shaped body.Side wall includes multiple dividing bodies independent of each other in the circumferential direction of side wall.Flange is protruded outward from the opposite end in the circumferential direction of each dividing body respectively.Each flange includes low compression portion and high compression portion, and high compression portion is located at the inside of low compression portion.Each flange of each dividing body is matched and is contacted with a flange in the flange of corresponding dividing body.The engaging portion made of plastic material is configured at the part being in contact with each other of each pair of flange, which is located at the outside of high compression portion, and engaging portion is around the part and the part is made to be bonded to each other.)

1. a kind of air inlet pipe for internal combustion engine, the air inlet pipe includes the pipe made of the fiber shaped body Jing Guo compression forming Shape side wall, the air inlet pipe be characterized in that,

The side wall includes multiple dividing bodies independent of each other in the circumferential direction of the side wall,

Flange is protruded outward from the opposite end in the circumferential direction of each dividing body respectively,

Each flange includes low compression portion and high compression portion, the high compression portion be located at the inside of the low compression portion and It is formed with the compression ratio higher than the compression ratio of the low compression portion,

Each flange of each dividing body is matched and is contacted with a flange in the flange of corresponding dividing body, and And

The engaging portion made of plastic material is configured at each part being in contact with each other to the flange, and the part is located at described The outside of high compression portion, the engaging portion is around the part and the part is made to be bonded to each other.

2. air inlet pipe according to claim 1, which is characterized in that

The part of each of two flanges being in contact with each other includes protrusion, described in the protrusion ratio of described two flanges The other parts of two flanges more protrude outward,

Each engaging portion includes the lid for covering corresponding protrusion, and

Each protrusion is formed with the compression ratio lower than the compression ratio of the high compression portion.

3. air inlet pipe according to claim 2, which is characterized in that at least one of described lid is described including extending through The connection holes of lid.

4. air inlet pipe according to claim 3, which is characterized in that the connection holes extend through corresponding lid and by the lid The protrusion of covering.

Technical field

Explanation is related to the air inlet pipe for internal combustion engine below, which includes by the fiber shaped body Jing Guo compression forming The tubular sidewall of construction.

Background technique

Typical air inlet pipe for internal combustion engine is by the fiber shaped body construction Jing Guo compression forming (for example, referring to Japanese special Sharp No.5350982).The air inlet pipe illustrated in the document include by two halfbodies construct tubular sidewall, halfbody by non-woven fabrics at Type system at.Each halfbody includes from the outwardly projecting edge in opposite end in circumferential direction.The edge of halfbody is in contact with each other.By plasticity material Lid made of material is formed by injection moulding, around the edge being in contact with each other.Each lid is integrated with each other halfbody.

In the air inlet pipe of above-mentioned document, when forming lid, the molten plastic of injection may pass through two halfbodies of construction The gap of fiber and towards the inside of side wall leak out.In this case, the molten plastic of leakage it is prominent from the inner peripheral surface of side wall and It is hardened, to generate burr.Therefore, this burr increases the gas-flow resistance of the air inlet by pipeline.

Summary of the invention

Therefore, the purpose of the present invention is to provide the air inlet pipe for internal combustion engine, limit the increase of gas-flow resistance.

There is provided the content of present invention is to introduce selected concept in simplified form, these concepts are in following specific reality Applying in mode will be further illustrated.The content of present invention is not intended to the key feature for determining theme claimed or necessary special Sign, is intended to be used to assist in the range of theme claimed.

Provide the air inlet pipe for internal combustion engine for realizing above-mentioned purpose.Air inlet pipe includes by the fiber Jing Guo compression forming Tubular sidewall made of formed body.Side wall includes multiple dividing bodies independent of each other in the circumferential direction of side wall.Flange is respectively from each Opposite end in the circumferential direction of dividing body protrudes outward.Each flange includes low compression portion and high compression portion.High compression portion is located at low It the inside of compression unit and is formed with the high compression ratio of the compression ratio than low compression portion.Each flange of each dividing body divides with corresponding In the flange of body flange is cut to match and contact.The engaging portion made of plastic material is configured at connecing each other for each pair of flange The part of touching, the part are located at the outside of high compression portion, and engaging portion is around the part and the part is made to be bonded to each other.

Other feature and aspect will become obvious from detailed description below, attached drawing and technical solution.

Detailed description of the invention

Fig. 1 is the perspective view for showing the air inlet pipe for internal combustion engine according to the present embodiment.

Fig. 2 is the sectional view along the line 2-2 interception in Fig. 1.

Fig. 3 is the sectional view along the line 3-3 interception in Fig. 2.

Fig. 4 is the sectional view along the line 4-4 interception in Fig. 2.

Fig. 5 A and Fig. 5 B are the schematic diagrames for successively showing the manufacturing step of main body in present embodiment, and wherein Fig. 5 A is to show The schematic diagram of forming step, Fig. 5 B are the schematic diagrames for showing sliding step.

Fig. 6 A to Fig. 6 C is the sectional view for successively showing the manufacturing step of engaging portion in present embodiment, and wherein Fig. 6 A is to show The sectional view of halfbody before injection process out, Fig. 6 B are the sectional views for showing halfbody and mold in injection process, figure 6C is to show the sectional view to form the halfbody at engaging portion.

Fig. 7 is the sectional view for showing the air inlet pipe according to modification.

Fig. 8 is the sectional view along the line 8-8 interception in Fig. 7.

Specific embodiment

Present description provides the comprehensive understandings to illustrated method, apparatus and/or system.Illustrated method, dress It sets and/or the modifications and equivalents of system is apparent for those of ordinary skill in the art.Operation order is exemplary, right In those of ordinary skill in the art it is apparent that, thus it is possible to vary in addition to must with particular order carry out operation other than operation it is suitable Sequence.The explanation of function and construction known to a person of ordinary skill in the art may be omitted.

Illustrative embodiments can have different forms, and be not limited to illustrated example.However, illustrated Example is thorough and complete, and the full scope of the disclosure is communicated to those of ordinary skill in the art.

First embodiment

Now with reference to Fig. 1 to Fig. 6 C illustrate according to embodiment for internal combustion engine air inlet pipe (hereinafter referred into Tracheae 10).In the following description, by the flow direction of the air inlet in air inlet pipe 10 upstream side and downstream side be briefly referred to as Upstream side and downstream side.

As shown in Figure 1, air inlet pipe 10 includes tubular fiber portion 20, tubular inlet 12 and tubular junction 14.Entrance 12 In the upstream in fiber portion 20.Interconnecting piece 14 is located at the downstream in fiber portion 20.

Entrance 12 constructs the upstream end of air inlet pipe 10 and is made of rigid plastic material.Entrance 12 is internal diameter and outer diameter court The funnel shaped increased to the upstream side.The internal diameter substantially phase of the internal diameter of the downstream of entrance 12 and the upstream end in fiber portion 20 Together.Therefore, the whole circumference between the inner peripheral surface of the upstream end of the inner peripheral surface and fiber portion 20 of the downstream of entrance 12 is almost Do not form step.

Interconnecting piece 14 constructs the downstream of air inlet pipe 10 and is made of rigid plastic material.The upstream end of interconnecting piece 14 Internal diameter is substantially the same with the internal diameter of the downstream in fiber portion 20.Therefore, in the inner peripheral surface and fiber of the upstream end of interconnecting piece 14 Whole circumference between the inner peripheral surface of the downstream in portion 20 is hardly formed step.The downstream of interconnecting piece 14 is connected to air filter The entrance (not shown) of clear device.

Shown in as shown in Figure 1, Figure 3 and Figure 4, fiber portion 20 includes tubular sidewall 21.Side wall 21 is by the fiber Jing Guo compression forming Formed body is made.Side wall 21 includes two tubulose the halfbodies 22A and 22B of (separate) independent of one another in the circumferential.It is, Side wall 21 includes dividing body (split) independent of each other in the circumferential.

As shown in Figure 3 and Figure 4, halfbody 22A and 22B is symmetrical about the divisional plane of side wall 21.Therefore, in the following description, Similar or identical appended drawing reference is assigned to the corresponding component of each of halfbody 22A and 22B.Such component will not be said It is bright.

Halfbody 22A (22B) includes main body 22a and two flanges 23a and 23b.Main body 22a has the shape of semicanal.Flange 23a and 23b is protruded outward from the opposite end in the circumferential direction of main body 22a.Flange 23a and 23b is along axial (hereinafter referred to axial direction L) It is configured at entire main body 22a.

As shown in Figures 2 to 4, each of the flange 23a and 23b of halfbody 22A (22B) successively includes from inside First low compression portion 24, high compression portion 25 and the second low compression portion 26.It is formed with compression ratio identical with the compression ratio of main body 22a First low compression portion 24.High compression portion 25 is formed with the compression ratio higher than the compression ratio of the first low compression portion 24.With low with first The identical compression ratio of the compression ratio of compression unit 24 forms the second low compression portion 26.

First low compression portion 24, high compression portion 25 and the second low compression portion 26 are entirely configured at axial L.

As shown in Figure 2 and Figure 4, middle section of the flange 23a of halfbody 22A (22B) on axial L includes the first protrusion 36.First other parts of the protrusion 36 than flange 23a more protrude outward.

Middle section of the flange 23b of halfbody 22A (22B) on axial L includes the second protrusion 37.Second protrusion 37 is than convex The other parts of edge 23b more protrude outward.The protrusion length of second protrusion 37 is greater than the protrusion length of the first protrusion 36.

Protrusion 36 and 37 is formed with the compression ratio lower than the compression ratio of high compression portion 25.In the present embodiment, protrusion 36 and 37 compression ratio is identical as the compression ratio of low compression portion 24 and 26.

Second protrusion 37 includes the through-hole 38 for extending through the second protrusion 37 in a thickness direction.The cross sectional shape of through-hole 38 It is round.

It will now describe the fiber shaped body in construction fiber portion 20.

Fiber shaped body is by the non-woven fabrics and typical core-that are made up of polyethylene terephthalate (PET) fiber The non-woven fabrics of sheath composite fibre is made, typical core-sheath composite fibre include for example the core (not shown) made of PET and by Sheath (not shown) made of low-melting denaturation PE T of the fusing point than PET fiber.The denaturation PE T of sheath as composite fibre has The effect for the binder for being bonded to one another fiber.

Preferably, the compound percentages of denaturation PE T are 30% to 70%.In the present embodiment, the mixing of denaturation PE T Percentage is 50%.

This composite fibre can also include the low-melting polypropylene (PP) of fusing point ratio PET.

Preferably, the quality of the per unit area of fiber shaped body is 500g/m²To 1500g/m².In present embodiment In, the quality of the per unit area of fiber shaped body is 800g/m²。

Halfbody 22A and 22B carry out hot pressing by the above-mentioned nonwoven sheet to the predetermined thickness with such as 30mm to 100mm It contracts (hot pressing) and is formed.

High compression portion 25 has about 0cm³/cm²The air permeability (JIS L 1096A- method (Frazier method)) of s. Moreover it is preferred that high compression portion 25 has the thickness of 0.3mm to 1.5mm.In the present embodiment, high compression portion 25 has The thickness of 0.7mm.

Main body 22a and low compression portion 24 and 26 have 3cm³/cm²The air permeability of s.Moreover it is preferred that main body 22a And low compression portion 24 and 26 has the thickness of 1.0mm to 3.0mm.In the present embodiment, main body 22a and low compression portion 24 With 26 thickness with 1.0mm.

As shown in Figures 2 to 4, the second low compression portion 26 of two flange 23a and 36 engaged portion 40a of protrusion surround and It is bonded to each other by engaging portion 40a.Similarly, the second low compression portion 26 of two flange 23b and 37 engaged portion 40b of protrusion enclose It is bonded to each other around and by engaging portion 40b.40a and 40b are made of rigid plastic material for engaging portion.

As shown in Figure 2 and Figure 4, engaging portion 40a includes the first lid 46 for covering entire first protrusion 36.

Engaging portion 40b includes the second lid 47 for covering entire second protrusion 37.

As shown in Fig. 2, the second lid 47 includes connection holes 48, which is oriented concentric with through-hole 38.Connection holes 48 extend through the second lid 47 in a thickness direction and have circular section shape.It is, the inner peripheral surface of through-hole 38 is by The covering of two lids 47.

Air inlet pipe 10 is by being inserted through the bolt-connection of connection holes 48 to the specified portions of vehicle.

It will now describe the manufacturing method of air inlet pipe 10.

As fig. 5 a and fig. 5b, pass through mold using two cooling pressurizing molds (the first mold 50 and the second mold 60) Sliding injection (DSI) molding is to manufacture air inlet pipe 10.

Firstly, the heating and compression by using hot plate pressurized equipment (not shown) carry out preforming cut to predetermined size Two non-woven fabric plates.

Then, two preforming non-woven fabric plates are individually positioned in the fixing mould portion 51 of the first mold 50 and moved Between mold 52 and between the fixing mould portion 61 and removable mold 62 of the second mold 60.The fixation of first mold 50 Mold 51 includes the forming face 51a being recessed along the outer peripheral surface of halfbody 22A.The removable mold 52 of first mold 50 includes Along the inner peripheral surface of halfbody 22A forming face 52a outstanding.The fixing mould portion 61 of second mold 60 includes along halfbody 22B Inner peripheral surface forming face 61a outstanding.The removable mold 62 of second mold 60 includes being recessed along the outer peripheral surface of halfbody 22B Forming face 62a.

Then, as shown in Figure 5A, it is mobile towards fixing mould portion 51 to move mold 52.This make fixing mould portion 51 with Non-woven fabric plate between removable mold 52 forms the forming face 51a and removable mold 52 along fixing mould portion 51 The shape of the semicanal of forming face 52a.Similarly, it is mobile towards fixing mould portion 61 to move mold 62.This makes fixing mould Non-woven fabric plate between portion 61 and removable mold 62 is formed as the forming face 61a and removable dynamic model along fixing mould portion 61 The shape of the semicanal of the forming face 62a in tool portion 62.

Come using the trimming tool (not shown) for being configured at fixing mould portion 51 and 61 or removable mold 52 and 62 Trim the redundance of the outside of non-woven fabric plate.This results in halfbody 22A and 22B, each of halfbody 22A and 22B are wrapped Include main body 22a and flange 23a and 23b.

In addition, the forming face 51a in the fixing mould portion 51 of the first mold 50 includes protrusion 55 (referring to Fig. 6 B).55 He of protrusion Removable mold 52 pressurizes to form high compression portion 25 in flange 23a and 23b to non-woven fabric plate.

In addition, the forming face 62a of the removable mold 62 of the second mold 60 includes protrusion 65 (referring to Fig. 6 B).Protrusion 65 It pressurizes non-woven fabric plate to form high compression portion 25 in flange 23a and 23b with fixing mould portion 61.Flange 23a and 23b are not The part pressurizeed by protrusion 55 and 65 is low compression portion 24 and 26.

After forming halfbody 22A and 22B in this way, mold 52 and 62 is moved in fixing mould portion 51 and 61 It is moved in orientation.This moves together halfbody 22B and the removable mold 62 of the second mold 60.As a result, such as Fig. 5 B institute Show, the removable mold 62 of the second mold 60 faces the fixing mould portion 51 of the first mold 50, and the face halfbody 22A and 22B To each other.This makes two the flanges 23a and 23b of halfbody 22A and 22B be in contact with each other as shown in Figure 6A.

After this, as shown in Figure 6B, the removable moving mold in the fixing mould portion 51 of the first mold 50 and the second mold 60 Portion 62 is closed.This makes the groove 56 and 66 being recessed in forming face 51a and 62a form chamber 70, chamber 70 around flange 23a the Two low compression portions 26 and the first protrusion 36.Although being not shown in fig. 6b, the groove 56 and 66 of chamber 70 is formed entirely convex Extend on the axial L of edge 23a to surround the second low compression portion 26.

Then, it is dashed forward by being located at the cast gate (gate) 71 in the outside (left side in Fig. 6 B) of the first protrusion 36 and being located at second Molten plastic is injected chamber 70 by the cast gate (not shown) for playing 37 outside.

As shown in Figure 6B, the molten plastic of injection is entirely around the first protrusion 36 and the second low compression portion 26.In addition, utilizing The molten plastic of injection constructs the fiber of the second low compression portion 26 to impregnate.

In addition, between the second low compression portion of gap-ratio 26 that high compression portion 25 has between the fibers has between the fibers Gap is small, and is pressurizeed by the protrusion of mold 50 and 60 55 and 65.It is inside by the gap between fiber which has limited molten plastics It is mobile.

The forming of the removable mold 62 of the forming face 51a in the fixing mould portion 51 of the first mold 50 and the second mold 60 Face 62a respectively includes the groove (not shown) of build chamber, is used for contoured inlet 12 and interconnecting piece 14.When molten plastic injects chamber When, entrance 12 and interconnecting piece 14 are integrally formed with flange 23a and 23b.

After the plastics cooling and hardening of injection, mold is opened.As shown in Figure 6 C, this results in include the first lid 46 Engaging portion 40a.In an identical manner, the engaging portion 40b including the second lid 47 is formd.

The advantages of will now describe present embodiment.

(1) air inlet pipe 10 includes tubular sidewall 21, and tubular sidewall 21 is made of the fiber shaped body Jing Guo compression forming.Side Wall 21 includes the halfbody 22A and 22B independent of each other in the circumferential direction of side wall 21.The opposite end of each of halfbody 22A and 22B Respectively include outwardly projecting flange 23a and 23b.Flange 23a and 23b include the first low compression portion 24, the second low compression portion 26 and high compression portion 25, high compression portion 25 be located at the inside of the second low compression portion 26 and with the compression than low compression portion 24 and 26 The high compression ratio of rate is formed.Two flange 23a of halfbody 22A and 22B are in contact with each other.It is, the flange 23a of halfbody 22A with The flange 23a of halfbody 22B is matched and is contacted.It is high that the engaging portion 40a made of plastic material is configured at being located at for two flange 23a Second low compression portion 26 in 25 outside of compression unit.Engaging portion 40a around the second low compression portion 26 and make the second low compression portion 26 that This is combined.Two flange 23b of halfbody 22A and 22B are in contact with each other.It is, the flange 23b's and halfbody 22B of halfbody 22A is convex Edge 23b is matched and is contacted.The engaging portion 40b made of plastic material be configured at two flange 23b be located at high compression portion 25 outside Second low compression portion 26 of side.Engaging portion 40b is around the second low compression portion 26 and the second low compression portion 26 is made to be bonded to each other.

In this configuration, the flange 23a and 23b of the construction side wall 21 of each of halfbody 22A and 22B are from outside Rise successively includes the second low compression portion 26 and high compression portion 25.In addition, two flange 23a's being in contact with each other is located at high compression portion Second low compression portion 26 in 25 outsides is tied by the engaging portion 40a made of plastic material around and through engaging portion 40a each other It closes.The second low compression portion 26 for being located at 25 outside of high compression portion for two flange 23b being in contact with each other is made of plastic material Engaging portion 40b be bonded to each other around and through engaging portion 40b.Therefore, when by injection moulding formed engaging portion 40a and When 40b, molten plastic is injected from the outside of flange 23a and 23b, to impregnate the second low compression portion of construction using molten plastic 26 fiber.Therefore, anchoring effect increases the bond strength of two flange 23a and the bond strength of two flange 23b.This Outside, the gap that the gap-ratio low compression portion 24 and 26 that high compression portion 25 has between the fibers has between the fibers is small.Therefore, The gap that high compression portion 25 limits between fiber of the molten plastic by constructing flange 23a and 23b moves inward.Which has limited The inner peripheral surface of molten plastic leakage side wall 21.Which has limited the increases of gas-flow resistance.

The part of (2) two flange 23a being in contact with each other includes protrusion 36, and other parts of the protrusion 36 than flange 23a are more It protrudes outward.Engaging portion 40a includes the first lid 46 for covering protrusion 36.The part of two flange 23b being in contact with each other includes prominent 37 are played, other parts of the protrusion 37 than flange 23b more protrude outward.Engaging portion 40b includes the second lid 47 for covering protrusion 37.

Each of protrusion 36 and 37 is formed with the compression ratio lower than the compression ratio of high compression portion 25.

It in this configuration, can be from flange 23a and 23b when forming engaging portion 40a and 40b by injection moulding Molten plastic is injected in the outside of protrusion 36 and 37.This is increased between injection molding cast gate and the inner peripheral surface of side wall 21 Distance.The gap between fiber that this further restricts molten plastics by constructing flange 23a and 23b moves inward.Therefore, Molten plastic is further limited to leak out from the inner peripheral surface of side wall 21.

Since protrusion 36 and 37 is formed with the compression ratio lower than the compression ratio of high compression portion 25, thus using molten plastic come Impregnate the gap between configured protrusion 36 and 37 fiber.Therefore, anchoring effect increase two protrusions 36 bond strength and The bond strength of two protrusions 37.

(3) connection holes 48 extend through the second lid 47.

In this configuration, air inlet pipe 10 for being easily coupled to pair to be coupled by the connection holes 48 of the second lid 47 As.

In injection moulding, when the mobility of molten plastic is low at the position that the stream in molten plastic merges, Plastics will not mix.There may be the relatively low weld portion of intensity (weak portions) for this.

In said structure, when injecting plastic material from the outside of the second lid 47, around the melting of the flowing of connection holes 48 The temperature and injection pressure of plastics keep high.Therefore mobility that this maintains molten plastic is high.Therefore, it limits in the second lid Weld portion is generated in 47.Which has limited the rigidity around connection holes 48 to reduce.

(4) connection holes 48 extend through the second protrusion 37 and the second lid 47.

In this configuration, connection holes 48 extend through the second protrusion 37 made of fiber shaped body and by plastic materials Manufactured second lid 47.Therefore, it by changing the compression ratio of the fiber shaped body of the second protrusion 37 of construction, can easily adjust The thickness of entire part with connection holes 48.

In addition, in said structure, the fiber of the second protrusion 37 of construction is impregnated using plastic material.Which increase connections Rigidity around hole 48.

It can be as described below to above embodiment modification.As long as not generation technique contradiction, so that it may so that above-mentioned implementation Mode and following modification are implemented in combination with each other.

It can be omitted the through-hole 38 of the second protrusion 37, and connection holes 48 can extend only through the second lid 47.It is this The first lid 46 can be configured at by connecing hole.

It can be omitted the first low compression portion 24.As shown in Figure 7 and Figure 8, flange 123a and 123b be configured at halfbody 122A and The opposite side of 122B.Flange 123a and 123b can respectively include high compression portion 125, so that the outer peripheral surface of side wall 121 is used as base End.The appended drawing reference of the component of above structure is assigned to Fig. 7 and component shown in fig. 8 plus 100 appended drawing reference.It will not say Bright this component.

It can be omitted protrusion 36 and 37.In this case, it is only necessary to which cast gate is configured at the second low of flange 23a and 23b The outside of compression unit 26 is to inject molten plastic.

Protrusion 36 and 37 only needs to be formed with the compression ratio lower than the compression ratio of high compression portion 25.The pressure of protrusion 36 and 37 Shrinkage can be different from the compression ratio of low compression portion 24 and 26.

In the case where not departing from the spirit and scope of claim and its equivalent, form can be carried out to above example With the various changes in details.These examples are merely to illustrate, and not for the purpose of limitation.To saying for the feature in each example The bright similar features or aspects being deemed applicable in other examples.If being executed in different order order, and/or such as Component in system illustrated by fruit, framework, device or circuit is differently combined, and/or by other components or its equivalent Suitable result then may be implemented in replace or supplement.The scope of the present disclosure is not limited by being described in detail, but by claim and Its equivalent limits.All changes in the range of claim and its equivalent are embraced within the disclosure.