JP5998992B2 - Intake device - Google Patents

Description

  The present invention relates to an intake device.

  2. Description of the Related Art Conventionally, an intake device including a plurality of intake passages that distribute and supply intake air to each cylinder of an engine is known (see, for example, Patent Document 1).

  In the above-mentioned Patent Document 1, four branch pipes (intake passages) for supplying intake air including PCV gas (blow-by gas) to four cylinders of an engine and outside the four branch pipes are introduced, and PCV gas is introduced. An intake manifold provided with a gas introduction port (not shown) and a gas passage provided in a projecting portion protruding toward the outside of the four branch pipes and guiding the PCV gas introduced from the gas introduction port to the four branch pipes ( An intake device) is disclosed. The gas passage of the intake manifold has a tournament shape that is formed in a laminated portion in which two members constituting the projecting portion are laminated, and is branched hierarchically in a direction perpendicular to the laminating direction in the laminated portion of the two members. Have.

Japanese Patent No. 4442201

  However, in the intake manifold (intake device) of Patent Document 1 described above, the gas passage is formed in a tournament shape that branches hierarchically in a direction perpendicular to the stacking direction in the stacked portion of the two members of the overhanging portion. There is an inconvenience that a space for forming a gas passage is increased in a direction (a direction along the stacked portion) perpendicular to the stacked direction of the stacked portion of the overhang portion. For this reason, there is a problem that the amount of overhang of the overhanging portion becomes large and the mountability of the intake manifold is lowered.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to mount a tournament-shaped gas passage that guides the first gas to a plurality of intake passages. It is an object of the present invention to provide an air intake device capable of suppressing a decrease in performance.

In order to achieve the above object, an intake device according to one aspect of the present invention includes a plurality of intake passages that distribute and supply intake air including a first gas and a second gas to each cylinder of an engine, and a plurality of intake passages. Provided on the upstream side of the outlet and on the outer side, the first introduction part having the first gas introduction port for introducing the first gas , and provided on the upstream side and the outer side of the outlets of the plurality of intake passages A second introduction part having a second gas introduction port for introducing a second gas different from the first gas, an upstream side and an outside of the outlets of the plurality of intake passages , and a plurality of members A first gas tournament passage that guides the first gas introduced from the first gas introduction port to a plurality of intake passages by being formed into a tournament shape that branches hierarchically in the stacking direction in a stacked state; Outside the multiple intake passages, One gas tournament passage is provided in a plurality of members in a state of being isolated from each other, and the second gas introduced from the second gas introduction port is supplied to a plurality of intake passages or a surge tank located upstream of the plurality of intake passages. comprising a second gas passage for guiding the first introduction part and the second introduction part, when viewed from the laminate direction, that are arranged to overlap. In the present application, the tournament shape that branches hierarchically in the stacking direction is not limited to the tournament shape that branches hierarchically in different stacked portions of the plurality of stacked members, but two stacked members. This is a broad concept including a tournament shape that is branched at one of the two members and then further branched inside one of the two members.

  In the intake device according to one aspect of the present invention, as described above, the plurality of members are stacked and formed in a tournament shape that branches hierarchically in the stacking direction, so that the first gas inlet port By providing a first gas tournament passage that guides the introduced first gas to a plurality of intake passages, in one laminated portion in which two members are laminated, the direction of the gas passage is perpendicular to the lamination direction (along the laminated portion). Unlike the case of forming a tournament shape that branches hierarchically toward the other direction, it is possible to suppress an increase in a space for forming a gas passage (first gas tournament passage) in one stacked portion. . Thereby, since it can suppress that the part (member) which provides a gas channel | path (1st gas tournament channel | path) overhangs in the direction along the lamination | stacking part, size reduction of an intake device can be achieved. Can do. As a result, even when a tournament-shaped gas passage (first gas tournament passage) that guides the first gas to a plurality of intake passages is provided, it is possible to suppress a reduction in the mounting performance of the intake device.

  In the intake device according to the above aspect, preferably, the plurality of members include three or more members including members that constitute the intake passage, and the first gas tournament passage includes three members that include the intake passage. It is formed so as to branch hierarchically in the stacking direction with the above members stacked. If comprised in this way, since the thickness of the lamination direction becomes large by three or more members including the member which comprises an intake passage, the 1st gas tournament channel | path can be formed so that it may extend easily in a lamination direction. . As a result, it is possible to further suppress the first gas tournament passage from excessively projecting in the direction along the stacked portion, so that the intake device can be further downsized.

  In this case, it is preferable that the plurality of members include three members joined to each other including the members constituting the intake passage, and the first gas tournament passage is in the stacking direction in a state where the joint surfaces of the three members are stacked. It is formed so as to branch hierarchically toward. If comprised in this way, suppressing that the 1st gas tournament channel | path will protrude excessively in the direction along the lamination | stacking part, suppressing the member for forming a 1st gas tournament channel | channel increasing. it can.

  In the above configuration, in which the plurality of members include three members joined to each other including a member constituting the intake passage, preferably, the three members constitute the intake passage, and the first gas tournament passage constitutes the intake passage. In the state where the joint surfaces of the three members are stacked, the three members are formed so as to branch hierarchically in the stacking direction. If comprised in this way, since the 1st gas tournament channel | path can be formed toward the lamination direction using three members which comprise an intake passage, the 1st gas tournament channel | path is the direction along the lamination | stacking part. It is possible to eliminate the need to provide a dedicated member for forming the first gas tournament passage while suppressing excessive protrusion. As a result, an increase in the number of members due to the formation of the first gas tournament passage can be suppressed while reducing the size of the intake device.

In the intake device according to the above aspect, preferably, the plurality of members are made of resin, and the first gas tournament passage is formed by bonding the plurality of members made of resin together. According to this structure, the first gas tournament passage is easily branched hierarchically in the stacking direction of the plurality of members by using the plurality of resin members that can be easily joined by vibration welding or the like. Can be formed .

In the intake device according to the above aspect , preferably, the second gas passage is branched from the second gas introduction port toward the downstream side, and a plurality of second gases introduced from the second gas introduction port are supplied to the plurality of second gas passages. It is configured to lead to an intake passage or a surge tank. If comprised in this way, unlike the case where 2nd gas is introduce | transduced into an intake passage or a surge tank from one place, 2nd gas is disperse | distributed to several positions with the 2nd gas passage branched toward the downstream. In this state, the second gas can be introduced into the intake air, so that the second gas can be distributed.

  In the configuration including the second gas passage, preferably, the second gas passage is formed by stacking at least two members among a plurality of members forming the first gas tournament passage. If comprised in this way, since the 2nd gas channel can be formed by diverting at least 2 member which forms the 1st gas tournament channel, the increase in a number of parts can be controlled.

  In the configuration including the second gas passage, preferably, the second gas passage is formed in a tournament shape so as to branch hierarchically from the second gas inlet toward the downstream side, whereby the second gas passage is formed. A second gas tournament passage for guiding the second gas introduced from the introduction port to the plurality of intake passages is included. With this configuration, not only the first gas but also the second gas can be introduced uniformly into the plurality of intake passages by the tournament-shaped second gas tournament passage. It is possible to improve the distribution of both gases.

  In the configuration in which the second gas passage includes the second gas tournament passage, preferably, the second gas passage is provided at a position corresponding to each of the plurality of intake passages of the first gas tournament passage, and the first gas tournament passage, the plurality of intake passages, A plurality of first intake passage connection portions that respectively connect the first intake passage connection portion and the first intake passage connection portion, and are provided at positions corresponding to the plurality of intake passages of the second gas tournament passage, A plurality of second intake passage connection portions that respectively connect the gas tournament passage and the plurality of intake passages. If comprised in this way, since 1st gas and 2nd gas are introduce | transduced into a mutually different position of an intake passage via the 1st intake passage connection part and the 2nd intake passage connection part, respectively, 1st gas and 2nd It is possible to prevent the gases from contacting each other in the intake passage while maintaining a high concentration (not diluted by intake air). As a result, it is possible to suppress deposits called deposits (for example, deposits caused by contact between blow-by gas and EGR gas) due to the contact between the first gas and the second gas with a high concentration. it can.

  In the configuration including the second gas passage, preferably, the first gas and the second gas are three gases of blow-by gas, evaporated fuel gas generated in the fuel tank, and recirculated exhaust gas, respectively. Two different gases selected from among the two. If comprised in this way, even if it provides the 1st gas tournament channel | path, it will be selected from three gas of blow-by gas, evaporated fuel gas, and exhaust gas, suppressing the mounting property of an intake device falling. Two different gases can be introduced into the intake air.

  In the present application, in addition to the intake device according to the above aspect, the following other configurations are also conceivable.

(Additional item 1)
That is, an intake system according to another configuration of the present application is provided with a plurality of intake passages that distribute intake air including a first gas to each cylinder of the engine, and outside the plurality of intake passages, and introduces the first gas. A first gas introduction port, a second gas introduction port provided outside the plurality of intake passages to introduce the second gas, and a second gas introduction port provided outside the plurality of intake passages and introduced from the first gas introduction port. A first gas passage that guides one gas to a plurality of intake passages, and a first gas passage that is provided outside the plurality of intake passages separately from the first gas passage, and that introduces the second gas introduced from the second gas inlet into the plurality of intake passages Alternatively, a second gas passage led to a surge tank located upstream of the plurality of intake passages is provided. If comprised in this way, two different gas (1st gas and 2nd gas) in the mutually different position suitable for the characteristic of each gas by the 1st gas channel and 2nd gas channel which were provided mutually separately. Since it can be introduced, the engine performance can be effectively improved by the first gas and the second gas.

(Appendix 2)
In the intake device according to the other configuration described above, preferably, at least the first gas passage of the first gas passage and the second gas passage includes a tournament passage that branches hierarchically toward the downstream side. If comprised in this way, at least 1st gas can be equally introduce | transduced into several intake passage by a tournament passage, Therefore Engine performance can be improved more effectively by 1st gas.

  According to the invention according to the above aspect, even when a tournament-shaped gas passage (first gas tournament passage) that guides the first gas to the plurality of intake passages is provided, the mountability of the intake device is reduced. Can be suppressed.

Is a schematic view showing an arrangement position of the air intake device according Kazumi facilities embodiment and reference examples of the present invention. It is the figure which showed the structure of the intake device by one Embodiment of this invention. It is the disassembled perspective view which showed the flow path of EGR gas in the intake device by one Embodiment of this invention. It is the disassembled perspective view which showed the distribution route of the blowby gas in the intake device by one Embodiment of this invention. It is the top view which looked at the upper member of the air intake device by one Embodiment of this invention from the 1st cover member side. It is the top view which looked at the intermediate member of the air intake device by one Embodiment of this invention from the upper member side. It is the top view which looked at the 1st cover member of the air intake device by one embodiment of the present invention from the 2nd cover member side. It is the top view which looked at the 1st cover member of the air intake device by one embodiment of the present invention from the upper member side. It is the top view which looked at the 2nd cover member of the air intake device by one embodiment of the present invention from the 1st cover member side. It is sectional drawing along the lamination direction of the 1st gas passage in the intake device by one Embodiment of this invention. It is the figure which showed the structure of the intake device by the reference example of this invention. It is the schematic which showed the planar shape of the 1st gas path of the intake device by the reference example of this invention, and a 2nd gas path. It is the disassembled perspective view which showed the periphery of the 1st gas path and 2nd gas path of the intake device by the reference example of this invention. It is the schematic which showed the shape (side surface shape) in the lamination direction of the 1st gas channel of the intake device by the reference example of this invention, and a 2nd gas channel. It is the top view which looked at the upper member (upper gas channel part) of the intake device by the reference example of this invention from the intermediate member side. It is the top view which looked at the intermediate member (intermediate gas passage part) of the intake device by the reference example of the present invention from the upper member side. It is the top view which looked at the intermediate member (intermediate gas passage part) of the intake device by the reference example of this invention from the lower member side. It is the top view which looked at the lower member (lower gas passage part) of the intake device by the reference example of this invention from the intermediate member side.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

( This embodiment)
With reference to FIGS. 1-10, the structure of the intake device 100 by one Embodiment of this invention is demonstrated.

As shown in FIG. 1, an intake device 100 according to an embodiment of the present invention is an intake device for a four-cylinder engine 10 for an automobile. The intake device 100 is configured such that intake air that reaches through the air cleaner 20 and the throttle valve 30 flows in. The intake device 100 is provided on the upstream side of the cylinder head 10 a of the engine 10 and is configured to guide intake air to each cylinder of the engine 10. A head cover 10b is provided above the cylinder head 10a of the engine 10, and a crankcase 10c is provided below the cylinder head 10a. An exhaust manifold (exhaust manifold) 40 is provided on the downstream side of the cylinder head 10a.

In the configuration of the present embodiment, the intake device 100 is configured such that blow-by gas (PCV (Positive Crankcase Ventilation) gas) leaked from the combustion chamber of the engine 10 to the crankcase 10c is returned from the crankcase 10c. ing. Further, the intake device 100 is configured to be supplied with exhaust gas (EGR (Exhaust Gas Recirculation) gas) that is recirculated. The intake device 100 is configured to introduce EGR gas and blow-by gas into the intake air and guide them to each cylinder. Hereinafter, a detailed configuration of the intake device 100 according to an embodiment of the present invention will be described.

  As shown in FIGS. 2 to 4, the intake device 100 includes a surge tank 1 and four intake passages 2 positioned downstream of the surge tank 1. Structurally, the intake device 100 includes an intake device main body 101 that integrally includes the surge tank 1 and the four intake passages 2. As shown in FIGS. 3 and 4, the intake device main body 101 includes an upper member 101a, an intermediate member 101b, and a lower member 101c. These three members are integrally joined in a state where they are stacked on each other by vibration welding. ing. The surge tank 1 is composed of an intermediate member 101b and a lower member 101c, and the four intake passages 2 are composed of an upper member 101a and an intermediate member 101b.

  The surge tank 1 is provided with a suction hole 11 that guides intake air supplied through the air cleaner 20 and the throttle valve 30 to the surge tank 1. The four intake passages 2 have one end connected to the cylinder head 10 a and the other end connected to the surge tank 1. The four intake passages 2 are configured to distribute and supply intake air including EGR gas and blow-by gas to each cylinder of the engine 10.

Here, in the present embodiment, the intake device 100 includes a first gas passage 3 and a second gas passage 4 that introduce EGR gas and blow-by gas into the intake air supplied to the engine 10, respectively. As shown in FIGS. 3 and 4, a first cover member 5 that forms the first gas passage 3 and the second gas passage 4 is laminated on the upper member 101 a of the intake device main body 101, and the first cover member On the upper side of 5, a second cover member 6 that forms the first gas passage 3 is laminated. The first cover member 5 and the upper member 101a are integrally joined in a state where they are laminated together by vibration welding, and the first cover member 5 and the second cover member 6 are laminated together by vibration welding. Are joined together. That is, the first gas passage 3 and the second gas passage 4 are formed by joining the upper member 101a, the first cover member 5 and the second cover member 6 to each other outside the four intake passages 2 in a stacked state. Has been. The first gas passage 3 is an example of the “first gas tournament passage” in the present invention.

  As shown in FIGS. 3 to 5, gas passage portions 7 constituting the first gas passage 3 and the second gas passage 4 are provided outside the four intake passages 2 of the upper member 101a. The gas passage portion 7 is disposed between the two first groove portions 71 extending in the direction in which the four intake passages 2 are adjacent (the X direction shown in FIG. 5) and the two first groove portions 71, and has a substantially Y shape. The second groove portion 72 is included. The second groove 72 is formed so as to extend in the X direction. Moreover, the 1st groove part 71 and the 2nd groove part 72 are provided in the mutually independent state. That is, the first groove 71 and the second groove 72 are not connected to each other.

  Four through holes 711 are formed at both ends of each of the two first groove portions 71 so as to communicate from the outside to the inside of the intake passage 2. Specifically, the first groove 71 located on one side in the X direction (X1 direction side shown in FIG. 5) is disposed across the two intake passages 2 located on one side of the four intake passages 2. The two through holes 711 at both ends are connected to the two intake passages 2 located on one side. Similarly, the first groove 71 located on the other side in the X direction (X2 direction side shown in FIG. 5) is disposed across the two intake passages 2 located on the other side of the four intake passages 2. The two through holes 711 at both ends are connected to the two intake passages 2 located on the other side. The four through holes 711 function as connecting portions that connect the first gas passage 3 for EGR gas and the four intake passages 2 respectively. The four through holes 711 are respectively provided at positions corresponding to the four intake passages 2 of the first gas passage 3 and at positions corresponding to the outlets 21 of the corresponding intake passages 2. The through hole 711 is an example of the “first intake passage connecting portion” in the present invention.

  Through holes 721 that penetrate from the upper surface side (first cover member 5 side) to the lower surface side (intermediate member 101b side) are formed at both ends of the second groove portion 72 in the X direction. The two through-holes 721 are respectively positioned between two intake passages 2 located on one side in the X direction (X1 direction side) and two intake air located on the other side in the X direction (X2 direction side). It is arranged at a position between the passages 2. As shown in FIGS. 3, 4, and 6, two through holes 722 that penetrate from the upper member 101a side to the lower member 101c side are located at positions corresponding to the two through holes 721 of the intermediate member 101b. Is formed. As shown in FIGS. 3 and 4, two protrusions 101d are provided at positions corresponding to the two through holes 722 of the lower member 101c, and the surge tank 1 is formed so as to protrude. The two through holes 722 are connected to positions corresponding to the two protruding portions 101 d of the surge tank 1. That is, the second groove 72 is connected to the surge tank 1 via the two through holes 721 of the upper member 101a and the two through holes 722 of the intermediate member 101b.

  As shown in FIGS. 3, 4, and 7, a first groove 51 extending in the X direction is formed on the second cover member 6 side of the first cover member 5. As shown in FIG. 8, two second groove portions 52 extending in the X direction are formed on the upper member 101 a side of the first cover member 5 and substantially Y-shaped between the two second groove portions 52. A third groove portion 53 having the shape is formed. The two second groove portions 52 are formed at positions corresponding to the two first groove portions 71 of the upper member 101a and in a corresponding shape, and the substantially Y-shaped third groove portion 53 is the second groove portion 53 of the upper member 101a. It is formed at a position corresponding to the two groove portions 72 and in a corresponding shape. Further, the downstream groove 31 of the first gas passage 3 is constituted by the second groove 52 of the first cover member 5 and the first groove 71 of the upper member 101 a corresponding to the second groove 52. Further, the branch portion 41 of the second gas passage 4 is constituted by the substantially Y-shaped third groove portion 53 of the first cover member 5 and the corresponding second groove portion 72 of the upper member 101a. That is, the downstream branch portion 31 of the first gas passage 3 and the branch portion 41 of the second gas passage 4 are both provided in the stacked portion between the upper member 101 a and the first cover member 5. The first cover member 5 includes a gas inlet 54 for introducing blow-by gas into the second gas passage 4 as shown in FIGS. 3, 4, 7 and 8. The gas inlet 54 is connected to the third groove portion 53. Through holes 511 are formed at both ends of the first groove portion 51 in the X direction. The two through holes 511 are respectively connected to the second groove portion 52 on the X1 direction side and the second groove portion 52 on the X2 direction side. The gas inlet 54 is an example of the “second gas inlet” in the present invention.

  As shown in FIG. 9, a groove 61 extending in the X direction is formed on the first cover member 5 side of the second cover member 6. The groove 61 is formed at a position corresponding to the first groove 51 of the first cover member 5 and in a corresponding shape. The groove portion 61 of the second cover member 6 and the first groove portion 51 of the first cover member 5 constitute the upstream branch portion 32 of the first gas passage 3. In other words, the upstream branch portion 32 of the first gas passage 3 is provided in a stacked portion between the first cover member 5 and the second cover member 6. The second cover member 6 includes a gas inlet 62 for introducing EGR gas into the first gas passage 3 as shown in FIGS. 2 to 4 and 9. The gas inlet 62 is connected to the groove 61. The gas inlet 62 is an example of the “first gas inlet” in the present invention.

  With the above configuration, in the first gas passage 3, as shown in FIGS. 3 and 10, the joining surfaces of the three members (the upper member 101a, the first cover member 5, and the second cover member 6) are laminated. Thus, the EGR gas is guided to the four intake passages 2 by being formed into a tournament shape that hierarchically branches in the stacking direction (Z direction). That is, the first gas passage 3 is located in a laminated portion between the first cover member 5 and the second cover member 6 from the introduction portion 33 in the vicinity of the gas introduction port 62 of the second cover member 6 toward the downstream side. The upstream branching portion 32 is branched into two, and the two downstream branching portions 31 located in the laminated portion between the upper member 101a and the first cover member 5 are branched into four. In other words, the EGR gas introduced from the gas introduction port 62 passes through the introduction part 33 of the first gas passage 3 and is then distributed in two by the upstream branch part 32. Then, the EGR gas distributed to the second hand is distributed to the second hand by the two downstream branch portions 31 and led to the four intake passages 2.

  As shown in FIG. 4, the second gas passage 4 includes three members (an upper member 101a, a first cover member 5 and an intermediate member including an upper member 101a and a first cover member 5 forming the first gas passage 3). It is formed by laminating members 101b). The second gas passage 4 is configured to guide the blow-by gas to the surge tank 1 while being branched from the gas inlet 54 toward the downstream side. That is, the second gas passage 4 branches from the introduction portion 42 in the vicinity of the gas introduction port 54 of the first cover member 5 toward the downstream side, and is located at a laminated portion between the upper member 101 a and the first cover member 5. The part 41 is branched into two. In other words, the blow-by gas introduced from the gas introduction port 54 passes through the introduction part 42 of the second gas passage 4 and is then distributed in two by the branch part 41, so that the two through holes of the upper member 101 a 721 and the two through holes 722 of the intermediate member 101b are guided to the surge tank 1.

In the present embodiment, as described above, the three members (the upper member 101a, the first cover member 5, and the second cover member 6) are hierarchically branched in the stacking direction (Z direction) in a stacked state. By forming the first gas passage 3 that guides the EGR gas introduced from the gas introduction port 62 to the four intake passages 2 by being formed into a tournament shape, in one laminated portion in which two members are laminated, Unlike the case where the gas passage is formed in a tournament shape that branches hierarchically in the direction orthogonal to the stacking direction (the direction along the stacking portion), the gas passage (first gas passage 3) is formed in one stacking portion. It is possible to suppress an increase in the space for doing so. Thereby, it is suppressed that the part (the 1st cover member 5, the 2nd cover member 6, and the gas passage part 7) which provides a gas passage (1st gas passage 3) overhangs in the direction along the lamination | stacking part. Therefore, the intake device can be reduced in size accordingly. As a result, even when a tournament-shaped gas passage (first gas passage 3) for guiding the EGR gas to the four intake passages 2 is provided, it is possible to suppress a reduction in mountability of the intake device 100.

In the present embodiment, as described above, the first gas passage 3 is divided into three members including the upper member 101a constituting the intake passage 2 (upper member 101a, first cover member 5 and second cover member 6). Are stacked so as to branch hierarchically in the stacking direction. Thereby, the thickness in the stacking direction is increased by the three members including the members constituting the intake passage 2, so that the first gas passage 3 can be easily formed to extend in the stacking direction. As a result, it is possible to further suppress the first gas passage 3 from excessively projecting in the direction along the laminated portion, and thus the intake device 100 can be further reduced in size. In addition, since the first gas passage 3 is formed by the three members, the first gas passage 3 extends in the direction along the laminated portion while suppressing an increase in the number of members for forming the first gas passage 3. Excessive overhanging can be suppressed.

Further, in the present embodiment, as described above, the first gas passage 3 is joined to each other in a state where three members made of resin (the upper member 101a, the first cover member 5, and the second cover member 6) are laminated. To form. Thus, the first gas passage 3 is easily formed so as to branch hierarchically in the stacking direction of the three members by using three resin-made members that can be easily joined by vibration welding or the like. Can do.

In the present embodiment, as described above, the four through holes 711 are provided on the outlet 21 side of each of the four intake passages 2 and connect the first gas passage 3 and the four intake passages 2 respectively. . As a result, the EGR gas is introduced into the intake passage 2 through the through hole 711 at the position on the outlet 21 side of the intake passage 2, so that the EGR gas is closer to the engine 10 (cylinder head 10 a) located downstream of the intake passage 2. EGR gas can be introduced. As a result, since the EGR gas flow path in the intake passage 2 is shortened, the response of the engine 10 to the EGR gas can be improved.

Further, in the present embodiment, as described above, the blow-by gas introduced from the gas introduction port 54 outside the four intake passages 2 separately from the first gas passage 3 is upstream of the four intake passages 2. A second gas passage 4 that leads to the surge tank 1 located at is provided. As a result, the EGR gas can be evenly introduced into the four intake passages 2 while suppressing the mountability of the intake device 100 from being lowered by the tournament-shaped first gas passage 3, and what is the EGR gas? Different blow-by gases can be introduced into the intake air in the surge tank 1.

In the present embodiment, as described above, the blow-by gas introduced from the gas introduction port 54 is supplied to the surge tank 1 while the second gas passage 4 is branched from the gas introduction port 54 toward the downstream side. Configure to guide. Thus, unlike the case where the blow-by gas is introduced into the surge tank 1 from one place, the blow-by gas is introduced into the intake air in a state of being dispersed at a plurality of positions by the second gas passage 4 branched toward the downstream side. Therefore, the distribution of blow-by gas can be improved.

In the present embodiment, as described above, the second gas passage 4 is formed by laminating the upper member 101a and the first cover member 5 among the three members forming the first gas passage 3. Thereby, since the 2nd gas passage 4 can be formed by diverting two members which form the 1st gas passage 3, the increase in a number of parts can be controlled.

( Reference example )
Next, an intake device 200 according to a reference example of the present invention will be described with reference to FIGS. 1 and 11 to 18. In this reference example, unlike you facilities form on the second gas passage 4 for guiding the blow-by gas in the surge tank 1, the first gas passage 203 and the second gas passage 204, four blow-by gas and the EGR gas each intake A configuration leading to the passage 202 will be described. The first gas passage 203 is an example of the “first gas tournament passage” in the present invention, and the second gas passage 204 is an example of the “second gas tournament passage” in the present invention.

As shown in FIGS. 11 and 12, the intake device 200 according to the reference example of the present invention includes a surge tank 201 and four intake passages 202 positioned downstream of the surge tank 201. Further, structurally, the intake device 200 includes an intake device body 210 that integrally includes a surge tank 201 and four intake passages 202. As shown in FIGS. 11 and 13, the intake device main body 210 includes an upper member 210a, an intermediate member 210b, and a lower member 210c, and these three members are integrally joined in a state where they are stacked on each other by vibration welding. ing. The surge tank 201 is composed of two members, an intermediate member 210b and a lower member 210c, and the four intake passages 202 are composed of three members, an upper member 210a, an intermediate member 210b, and a lower member 210c. .

  The surge tank 201 is provided with a suction hole 211 that guides intake air supplied through the air cleaner 20 and the throttle valve 30 to the surge tank 201. The four intake passages 202 have one end connected to the cylinder head 10 a and the other end connected to the surge tank 201. Further, the four intake passages 202 are configured to distribute and supply intake air including EGR gas and blow-by gas to each cylinder of the engine 10.

Here, in the reference example , as illustrated in FIGS. 12 to 14, the intake device 200 includes a first gas passage 203 and a second gas passage 204 that introduce blow-by gas and EGR gas into the intake air supplied to the engine 10, respectively. It has. The first gas passage 203 and the second gas passage 204 are formed by joining the upper member 210a, the intermediate member 210b, and the lower member 210c to each other outside the four intake passages 202 in a stacked state.

  As shown in FIGS. 11 to 15, the upper gas passage portion 205 constituting the first gas passage 203 and the second gas passage 204 protrudes outward from the four intake passages 202 of the upper member 210 a. Is provided. On the intermediate gas passage 206 side (the Z2 direction side shown in FIG. 12) of the upper gas passage portion 205, which will be described later, as shown in FIG. 15, the four intake passages 202 spread in the adjacent direction (X direction). A groove portion 251 having a substantially V shape is formed. Further, the upper gas passage portion 205 includes a gas inlet 252 for introducing blow-by gas into the first gas passage 203 as shown in FIGS. 11, 12, and 13 to 15. The gas inlet 252 is connected to the groove 251. Further, a gas inlet 253 for introducing EGR gas into the second gas passage 204 is provided at a position sandwiched between the substantially V-shaped grooves 251 of the upper gas passage portion 205. The gas inlet 253 is formed so as to penetrate the upper gas passage portion 205 in the vertical direction (the stacking direction of the upper member 210a, the intermediate member 210b, and the lower member 210c (Z direction shown in FIG. 13)). The gas inlet 253 is an example of the “second gas inlet” in the present invention, and the gas inlet 252 is an example of the “first gas inlet” in the present invention.

  On the outside of the four intake passages 202 of the intermediate member 210b, as shown in FIGS. 13, 14, 16 and 17, there are intermediate gas passage portions 206 constituting the first gas passage 203 and the second gas passage 204. It is provided so as to protrude outward. On the upper gas passage portion 205 side (the Z1 direction side shown in FIG. 12) side of the intermediate gas passage portion 206, as shown in FIGS. One groove portion 261 is formed. Further, the intermediate gas passage 206 is provided with a through hole 262 constituting the second gas passage 204. The first groove portion 261 is formed at a position corresponding to the groove portion 251 of the upper gas passage portion 205 and in a corresponding shape, and the through hole 262 is located at a position corresponding to the gas inlet 253 of the upper gas passage portion 205. And it is formed in a corresponding shape. In addition, the groove portion 251 of the upper gas passage portion 205 and the first groove portion 261 of the intermediate gas passage portion 206 constitute an upstream branch portion 231 of the first gas passage 203. That is, the upstream branching portion 231 of the first gas passage 203 is provided in a stacked portion between the upper gas passage portion 205 of the upper member 210a and the intermediate gas passage portion 206 of the intermediate member 210b. Further, the gas introduction port 253 of the upper gas passage portion 205 and the through hole 262 of the intermediate gas passage portion 206 constitute an introduction portion 241 that extends in the stacking direction (Z direction) of the second gas passage 204.

  On the lower gas passage 207 side (the Z2 direction side shown in FIG. 13), which will be described later, of the intermediate gas passage portion 206, as shown in FIG. 17, a tournament-shaped second groove portion that branches hierarchically so as to spread in the X direction. 263 is formed. The second groove portion 263 is connected to the through hole 262. In addition, four connection grooves 264 connected to the four intake passages 202 are formed at the downstream end of the second groove 263.

  Further, as shown in FIGS. 14 and 16, the intermediate member 210 b extends in the X direction from both ends (two downstream ends) of the substantially V-shaped first groove 261. A formed lateral hole portion 265 is provided. The two lateral hole portions 265 are respectively connected to two downstream end portions of the substantially V-shaped first groove portion 261. Vertical hole portions 266 extending in the stacking direction (Z direction) are formed at both ends of the two horizontal hole portions 265, respectively. That is, the horizontal hole portion 265 has the first gas passage 203 branched by the upstream branch portion 231 formed by the groove portion 251 of the upper gas passage portion 205 and the first groove portion 261 of the intermediate gas passage portion 206 at both ends. A downstream branch portion 232 of the first gas passage 203 that further branches toward the two vertical hole portions 266 is configured. Each of the four vertical hole portions 266 penetrates from the horizontal hole portion 265 to the lower gas passage portion 207 side (Z2 direction side shown in FIG. 12) of the intermediate gas passage portion 206, which will be described later.

  On the outside of the four intake passages 202 of the lower member 210c, as shown in FIGS. 13, 14, and 18, lower gas passage portions 207 constituting the first gas passage 203 and the second gas passage 204 protrude outward. It is provided to do. A tournament-shaped groove 271 that branches hierarchically so as to spread in the X direction is formed on the intermediate gas passage 206 side (the Z1 direction side shown in FIG. 13) of the lower gas passage 207. In addition, four connection grooves 272 connected to the four intake passages 202 are formed at the downstream end of the groove portion 271. The groove portion 271 is formed at a position corresponding to the second groove portion 263 of the intermediate gas passage portion 206 and in a corresponding shape, and the four connection grooves 272 are four connection grooves 264 of the intermediate gas passage portion 206, respectively. Is formed at a position corresponding to the shape and corresponding shape. Further, the second groove portion 263 of the intermediate gas passage portion 206 and the groove portion 271 of the lower gas passage portion 207 constitute a tournament-shaped branch portion 242 of the second gas passage 204. That is, the tournament-shaped branch portion 242 of the second gas passage 204 is provided in a stacked portion between the intermediate gas passage portion 206 of the intermediate member 210b and the lower gas passage portion 207 of the lower member 210c. Further, four connection portions 243 for connecting the second gas passage 204 and the four intake passages 202 respectively by the four connection grooves 264 of the intermediate gas passage portion 206 and the four connection grooves 272 of the lower gas passage portion 207 are provided. It is composed. The four connection portions 243 are provided at positions corresponding to the four intake passages 202 of the second gas passage 204 and in the vicinity of the outlets 221 of the corresponding intake passages 202. The connecting portion 243 is an example of the “second intake passage connecting portion” in the present invention.

  Four through holes 273 are formed at positions corresponding to the vertical hole portions 266 of the lower member 210c from the intermediate member 210b side (Z1 direction side shown in FIG. 12) to the side portions of the four intake passages 202. Has been. The end portions on the intake passage 202 side of the four through holes 273 constitute four connection portions 233 that connect the first gas passage 203 and the four intake passages 202 respectively. The four connecting portions 233 are provided at positions corresponding to the four intake passages 202 of the first gas passage 203 and in the vicinity of the outlets 221 of the corresponding intake passages 202. As shown in FIGS. 13 and 14, the four connection portions 233 of the first gas passage 203 are provided at positions different from the four connection portions 243 of the second gas passage 204. Specifically, the four connection portions 233 of the first gas passage 203 for blow-by gas are arranged downstream (outlet 221 side) from the four connection portions 243 of the second gas passage 204 for EGR gas. Yes. The connecting portion 233 is an example of the “first intake passage connecting portion” in the present invention.

  With the above configuration, the first gas passage 203 for blow-by gas has a state in which the joining surfaces of the three members (upper member 210a, intermediate member 210b, and lower member 210c) are stacked, as shown in FIGS. Thus, the blow-by gas is configured to be guided to the four intake passages 202 by being formed into a tournament shape that hierarchically branches in the stacking direction (Z direction). That is, the first gas passage 203 has an upper member 210a and an intermediate member 210b from the introduction portion 234 (see FIG. 14) near the gas introduction port 252 provided in the upper gas passage portion 205 of the upper member 210a toward the downstream side. Is branched into two by an upstream branching portion 231 located in the laminated portion between the two and four branches by two downstream branching portions 232 provided inside the intermediate member 210b. In other words, the blow-by gas introduced from the gas inlet 252 passes through the introduction part 234 of the first gas passage 203 and is then distributed in two by the upstream branch part 231. The blow-by gas distributed in two hands is distributed into two hands by the two downstream branch portions 232 and guided to the four intake passages 202.

  As shown in FIGS. 13 and 14, the second gas passage 204 for EGR gas is formed by stacking three members (an upper member 210a, an intermediate member 210b, and a lower member 210c) that form the first gas passage 203. Is formed. The second gas passage 204 is configured to guide the EGR gas to each of the four intake passages 202 by being formed in a tournament shape so as to branch hierarchically from the gas inlet 253 toward the downstream side. Yes. That is, the second gas passage 204 extends from the introduction portion 241 (the gas introduction port 253 of the upper gas passage portion 205 and the through hole 262 of the intermediate gas passage portion 206) toward the downstream side, and the intermediate gas passage portion 206 of the intermediate member 210b. It is branched into four by a tournament-shaped branching portion 242 located in a layered portion between the lower member 210c and the lower gas passage portion 207 of the lower member 210c. In other words, the EGR gas introduced from the gas introduction port 253 passes through the introduction portion 241 of the upper gas passage portion 205 and the intermediate gas passage portion 206 and is then distributed by the tournament-shaped branch portion 242 in the state of 4 The four intake passages 202 are guided through the two connection portions 243.

The remaining structure of the reference example is the same as the above you facilities embodiment.

In the reference example , as described above, the first gas passage 203 is placed in the stacking direction (with the joining surfaces of the three members (upper member 210a, intermediate member 210b, and lower member 210c) constituting the intake passage 202 being stacked ( (Z direction) is formed so as to branch hierarchically. Accordingly, the first gas passage 203 can be formed in the stacking direction by diverting the three members constituting the intake passage 202, and therefore the first gas passage 203 is excessively stretched in the direction along the stacking portion. It is possible to eliminate the necessity of providing a dedicated member for forming the first gas passage 203 while suppressing the release. As a result, an increase in the number of members due to the formation of the first gas passage 203 can be suppressed while reducing the size of the intake device 200.

In the reference example , as described above, the tournament shape is formed so as to branch hierarchically from the gas introduction port 253 toward the downstream side, whereby four EGR gases introduced from the gas introduction port 253 are supplied. A second gas passage 204 that leads to the intake passage 202 is provided. As a result, not only blow-by gas but also EGR gas can be evenly introduced into the four intake passages 202 by the tournament-shaped second gas passage 204. Can be improved.

Further, in the reference example , as described above, the four connection portions 233 that connect the first gas passage 203 and the four intake passages 202 and the connection portions 233 are located at different positions and the second gas passage 204. Four connection portions 243 for connecting the second gas passage 204 and the four intake passages 202 are provided at positions corresponding to the four intake passages 202 respectively. As a result, blow-by gas and EGR gas are introduced into different positions of the intake passage 202 via the connection portion 233 and the connection portion 243, respectively, so that the blow-by gas and EGR gas remain at high concentrations in the intake passage 202 ( It is possible to suppress contact (in a state where the air is not diluted by intake air). As a result, it is possible to suppress deposits called deposits from being deposited due to the contact between the blow-by gas and the EGR gas with a high concentration. Further, the four connection portions 243 of the second gas passage 204 for EGR gas are arranged upstream of the four connection portions 233 of the first gas passage 203 for blow-by gas, thereby connecting the connection portions for EGR gas. Since it is possible to further suppress the contact between the EGR gas and the blow-by gas while maintaining a high concentration in the vicinity of 243, it is possible to further suppress deposits from being deposited on the connection portion 243 for EGR gas. As a result, the amount of EGR gas introduced can be adjusted more accurately.

Also, in the configuration of the reference example, as above you facilities embodiment, three members hierarchically towards the (upper member 210a, the intermediate member 210b and the lower member 210c) is the stacking direction while being stacked (Z-direction) By forming the first gas passage 203 that guides the blow-by gas introduced from the gas introduction port 252 to the four intake passages 202, the gas passage (first passage) is formed in one stacked portion. Since the space for forming the gas passage 203) can be suppressed, even when a tournament-shaped gas passage (first gas passage 203) for guiding the blow-by gas to the four intake passages 202 is provided, It can suppress that the mounting property of the intake device 200 falls.

The remaining effects of the reference example is similar to the above you facilities embodiment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

For example, in the above you facilities embodiment, the intake system of the present invention, an example of applying the engine for an automobile, the present invention is not limited thereto. You may apply the intake device of this invention to engines other than the engine for motor vehicles.

Further, in the above you施形state, as an example of the first gas and the second gas of the present invention, respectively, showed EGR gas (blow-by gas) and the blow-by gas (EGR gas), the present invention is to Not limited. In the present invention, the first gas and the second gas may be two different gases selected from the three gases of blow-by gas, evaporated fuel gas, and EGR gas, and the first gas may be EGR gas (blow-by gas). A combination other than the combination in which the second gas is blow-by gas (EGR gas). Further, the first gas and the second gas may be external gases other than blow-by gas, evaporated fuel gas, and EGR gas, respectively.

Further, in the above you facilities embodiment, the intake device, the example of providing four intake passages so as to correspond to the four-cylinder engine, the present invention is not limited thereto. In the present invention, a plurality of intake passages other than four may be provided in the intake device as long as the number corresponds to the number of cylinders of the engine.

Further, in the above you facilities embodiment, the first gas passage so that the three members including the members constituting the intake passage hierarchically branches towards the stacking direction while being stacked (the first gas tournament passage) Although the example which forms is shown, this invention is not limited to this. In the present invention, the first gas tournament passage may be formed so as to branch hierarchically in the stacking direction in a state where four or more members are stacked, or stacked in a state where two members are stacked. The first gas tournament passage may be formed so as to branch hierarchically in the direction.

Further, in the above you facilities embodiment, in addition to the first gas passage tournament shape (first gas tournament passage), an example of providing a second gas passage, the present invention is not limited thereto. In the present invention, like the first gas tournament passage, the second gas passage (second gas tournament passage) is formed in a tournament shape that branches hierarchically in the stacking direction in a state where a plurality of members are stacked. Thus, the second gas introduced from the second gas introduction port may be guided to the plurality of intake passages.

Further, in the above you facilities embodiment, a plurality of members that form the first gas passages, the example of integrally joined together by vibration welding, the present invention is not limited thereto. In the present invention, for example, a plurality of members forming the first gas passage such as a DSI (Die Slide Injection) method may be integrally joined to each other by a method other than vibration welding.

1,201 Surge tank 2,202 Intake passage 3,203 First gas passage (first gas tournament passage)
4 second gas passage 5 first cover member 6 second cover member 10 engine 21, 221 outlet 54 253 gas introduction port (second gas introduction port)
62,252 Gas inlet (first gas inlet)
100, 200 Intake device 10 1 a, 210a Upper member 10 1 b, 210b Intermediate member 10 1 c, 210c Lower member 204 Second gas passage (second gas tournament passage)
243 connection part (second intake passage connection part)
233 connection portion (first intake passage connection portion)
711 Through hole (first intake passage connection)

Claims (10)

A plurality of intake passages for distributing and supplying intake air including the first gas and the second gas to each cylinder of the engine;
A first introduction portion provided on the upstream side and the outside of the plurality of intake passages and having a first gas introduction port for introducing the first gas;
A second introduction part having a second gas introduction port that is provided on the upstream side and the outside of the plurality of intake passages and introduces a second gas different from the first gas;
By providing a tournament shape that is provided upstream and outside the outlets of the plurality of intake passages and that branches in a hierarchical manner toward the stacking direction in a state where a plurality of members are stacked, A first gas tournament passage for guiding the first gas introduced from one gas introduction port to the plurality of intake passages;
Outside the plurality of intake passages, the second gas, which is provided in the plurality of members and is isolated from the first gas tournament passage and introduced from the second gas introduction port, is supplied to the plurality of intake passages. A second gas passage leading to a passage or a surge tank located upstream of the plurality of intake passages ,
The first inlet portion and the second inlet portion, when viewed from the laminating direction, that is arranged to overlap the intake device. The plurality of members include three or more members including a member constituting the intake passage,
The said 1st gas tournament channel | path is formed so that it may branch hierarchically toward the lamination direction in the state in which three or more members including the member which comprises the said intake passage were laminated | stacked. Inhalation device. The plurality of members include three members joined to each other including members constituting the intake passage,
3. The intake device according to claim 2, wherein the first gas tournament passage is formed so as to branch hierarchically in a stacking direction in a state in which joint surfaces of the three members are stacked. The three members constitute the intake passage,
The said 1st gas tournament channel | path is formed so that it may branch hierarchically toward the lamination direction in the state which the joint surface of the said 3 member which comprises the said intake passage was laminated | stacked. Intake device. The plurality of members are made of resin,
5. The intake device according to claim 1, wherein the first gas tournament passage is formed by joining the plurality of resin members in a stacked state. The second gas passage is branched from the second gas introduction port toward the downstream side, and the second gas introduced from the second gas introduction port is supplied to the plurality of intake passages or the surge tank. The intake device according to any one of claims 1 to 5, wherein the intake device is configured to guide. The second gas passage, at least two members of the plurality of members that form the first gas tournament passages are formed by being laminated, according to any one of claims 1 to 6 Inhalation device. The second gas passage is formed in a tournament shape so as to branch hierarchically from the second gas introduction port toward the downstream side, thereby allowing the second gas introduced from the second gas introduction port to flow. The intake device according to any one of claims 1 to 7 , further comprising a second gas tournament passage leading to the plurality of intake passages. A plurality of first intake passage connection portions provided at positions corresponding to each of the plurality of intake passages of the first gas tournament passage, respectively connecting the first gas tournament passage and the plurality of intake passages;
Provided at a position different from the first intake passage connecting portion and corresponding to each of the plurality of intake passages of the second gas tournament passage, the second gas tournament passage, the plurality of intake passages, The intake device according to claim 8 , further comprising a plurality of second intake passage connection portions that respectively connect the two. The first gas and the second gas are two different gases selected from three gases: blow-by gas, evaporated fuel gas generated in the fuel tank, and exhaust gas to be recirculated, respectively. The air intake device according to any one of claims 1 to 9 .

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