JP2013253493A - Intake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake device configured to improved cooling performance and assemblability thereof.SOLUTION: An intake device 20 includes: a cover 21 connected to a cylinder head 32 having intake ports 311 therein, and having a plurality of branched passages 216 corresponding to the intake ports 311, a housing 22, and a cooling device 25 housed in a housing space 230 between the cover 21 and the housing 22. The cooling device 25 has a refrigerant conduit and a heat exchanging part, and a part of the refrigerant conduit is projected into the intake port 311 through the branched passage 216. Since the present invention has the heat exchanging part and a part of the refrigerant conduit is projected into the intake port 311, not only reheat of the intake air into the intake port 311 is suppressed, but also internal EGR gas can be efficiently cooled. Therefore, cooling performance of the intake device 20 can be improved.

Description

The present invention relates to an intake device provided in an intake system of an internal combustion engine (hereinafter referred to as “engine”).

  Conventionally, an intake device for suppressing a temperature rise of intake air taken into an engine has been disclosed. For example, in the invention disclosed in Patent Document 1, a cooling tube that can be inserted into the intake port of each cylinder is provided in the intake manifold.

JP 2007-138904 A

However, the cooling effect by the cooling tube described in Patent Document 1 is insufficient. Here, it is conceivable to improve the cooling performance by using a cooling device including a plurality of cooling tubes and heat exchange fins provided between the plurality of cooling tubes instead of the cooling tubes. However, it is difficult to insert a cooling device that can be inserted up to the intake port and has heat exchange fins into the intake manifold.
The present invention has been made in view of the above-described problems, and an object thereof is to provide an intake device that improves cooling performance and improves assemblability.

The present invention is connected to a cylinder head having an intake port formed therein, and is accommodated in a lid portion having a plurality of branch passages corresponding to the intake port, an accommodating portion, and an accommodating space between the lid portion and the accommodating portion. The cooling device has a refrigerant flow path and a heat exchange part, and a part of the refrigerant flow path projects into the intake port through the branch passage.
The present invention has a heat exchange part, and a part of the refrigerant flow path projects into the intake port, so that not only the intake air is reheated in the intake port, but also the internal EGR gas is efficiently Can be cooled. Therefore, the cooling performance of the intake device can be improved.

  Moreover, the cooling device is accommodated in the accommodating space between the lid portion and the accommodating portion. For this reason, a cover part and an accommodating part can be united in the state which has arrange | positioned the cooling device in the predetermined position between a cover part and an accommodating part. Therefore, the assembling property of the intake device can be improved.

The schematic diagram which shows the state which applied the intake device by one Embodiment of this invention to the intake system. The schematic diagram which shows the intake device by one Embodiment of this invention. FIG. 3 is a view in the direction of arrow III in FIG. 2. The IV direction arrow line view of FIG. The V direction arrow directional view of FIG. FIG. 6 is a partial cross-sectional view taken along line VI-VI in FIG. 3. The top view which shows the intercooler of the intake device by one Embodiment of this invention. The side view which shows the intercooler of the intake device by one Embodiment of this invention. The top view which shows the connection means of the intake device by one Embodiment of this invention. XX sectional drawing of FIG. The schematic diagram which shows the assembly | attachment method of the intake device by one Embodiment of this invention. The schematic diagram which shows the assembly | attachment method of the intake device by one Embodiment of this invention.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 shows an example in which the intake device according to the first embodiment of the present invention is applied to a vehicle engine system. As shown in FIG. 1, the engine system 100 includes an intake pipe 10, an intake device 20, an engine 30, an exhaust pipe 40, and a supercharger 50.

  An intake passage 11 is formed inside the intake pipe 10. An intake port 12 is formed at one end of the intake pipe 10. An air filter 13 is provided on the intake pipe 12 side of the intake pipe 10. The air filter 13 collects foreign matter in the intake air. An intake device 20 is provided at the other end of the intake pipe 10. A throttle valve 14 is provided on the intake pipe 20 in the intake passage 11 on the intake device 20 side. The throttle valve 14 can adjust the amount of intake air supplied to the engine 30 by adjusting the opening and closing of the intake passage 11.

  The intake device 20 includes an intake manifold 23 including a lid portion 21 and a housing portion 22, an intercooler 25 as a cooling device, and a connecting means 26. One of the intake manifolds 23 is connected to the intake pipe 10 and the other is connected to the engine 30. The intake manifold 23, the intercooler 25, and the connecting means 26 will be described in detail later.

  The engine 30 has three cylinders 31 in which combustion chambers 313 are formed. The engine 30 has a cylinder head 32 that closes one end of the cylinder 31. The cylinder head 32 is provided with three intake ports 311 corresponding to the cylinders 31. A passage 312 is formed inside the intake port 311. The passage 312 communicates with the combustion chamber 313 inside the cylinder 31 and accommodates the intake valve 317. An exhaust port 314 is provided on the opposite side of the cylinder 31 from the intake port 311. A passage 315 is formed inside the exhaust port 314. The passage 315 communicates with the combustion chamber 313.

  As shown in FIG. 1, the exhaust pipe 40 is connected to the exhaust port 314 of the engine 30. The end of the exhaust pipe 40 on the exhaust port 314 side branches into three, and each end is connected to the exhaust port 314. An exhaust port 42 is formed at the end of the exhaust pipe 40 opposite to the exhaust port 314. The exhaust pipe 40 forms an exhaust passage 41 inside. Combustion gas generated by combustion of gasoline in each combustion chamber 313 is discharged from the combustion chamber 313, flows through the exhaust port 314 and the exhaust passage 41, and is discharged to the outside of the vehicle through the exhaust port 42. Here, the combustion gas generated by the combustion of gasoline in each combustion chamber 313 is referred to as “exhaust”.

  On the exhaust port 42 side of the exhaust pipe 40, an exhaust purification unit 43 is provided. The exhaust purification unit 43 has, for example, a monolith three-way catalyst. As a result, the exhaust gas passing through the exhaust gas purification unit 43 is purified.

  The supercharger 50 is provided between the intake pipe 10 and the exhaust pipe 40. The supercharger 50 has a turbine 52, a compressor 51, and a shaft 53. The turbine 52 is rotatably provided between the engine 30 and the exhaust purification unit 43 in the exhaust passage 41. On the other hand, the compressor 51 is rotatably provided between the air filter 13 and the throttle valve 14 in the intake passage 11. The shaft 53 connects the turbine 52 and the compressor 51. When exhaust flows through the exhaust passage 41, the turbine 52 rotates. Thereby, the compressor 51 rotates. When the compressor 51 rotates, the intake air is compressed by the compressor 51 and supplied to the engine 30. That is, the supercharger 50 is a turbocharger that supercharges intake air to the engine 30. In addition, the intake air compressed by the compressor 51 is in a state where the temperature is increased on the engine 30 side of the compressor 51 as compared to the intake air on the air filter 13 side of the compressor 51.

Here, the intake manifold 23, the intercooler 25, and the connecting means 26 of the present embodiment will be described in detail with reference to FIGS.
The intake manifold 23 is formed in a long container shape, and includes a lid portion 21, a housing portion 22, and a housing space 230 formed between the lid portion 21 and the housing portion 22.

The lid part 21 is made of resin and has a dish part 211 formed in a dish shape and three passage parts 212.
The plate part 211 includes a flat plate part 213, a peripheral part 214 provided along the outer edge of the flat part 213, and a storage part connection flange part 215 formed on the opposite side of the peripheral part 214 to the flat part 213. . The accommodating portion connecting flange portion 215 is formed so as to expand in a direction parallel to the flat plate portion 213. A lid side welding rib 219 is formed on the side opposite to the flat plate part 213 of the lid side protruding rib 215 (see FIG. 12).

  The passage portion 212 protrudes on the opposite side to the peripheral edge portion 214 of the flat plate portion 213, is formed in a cylindrical shape, and has a branch passage 216 that communicates with the accommodation space 230 inside. A ring-shaped elastic member 82 is provided in the branch passage 216. The three passage portions 212 are formed to be aligned in the longitudinal direction at one end in the short direction of the flat plate portion 213 (see FIG. 3). An engine connection flange portion 217 is formed at the end of the three passage portions 212 opposite to the flat plate portion 213. The engine connection flange portion 217 is formed in a substantially rectangular plate shape and has a plurality of screw holes 218 (see FIG. 4). The engine connection flange portion 217 is fixed to the cylinder head 32 so that the branch passage 216 and the intake port 311 correspond to each other.

The accommodating part 22 is made of resin and has a bottom wall 221, two side walls 222, a lid part connecting flange part 224, and an arc wall 223.
As shown in FIG. 3, the bottom wall 221 has a right trapezoidal shape and is formed such that the distance between two parallel bases is longer than the longest base. The bottom wall 221 has a long hole 225 formed in the center between the two bottom sides. The long hole 225 is formed such that the length in the direction parallel to the bottom side of the bottom wall 221 is longer than the length in the direction orthogonal to the bottom side of the bottom wall 221. On both sides in the direction orthogonal to the bottom side of the long hole 225, a bottom wall side connecting portion 24 that is recessed from one surface of the bottom wall 221 and protrudes from the other surface is formed. Here, “one surface” refers to a surface facing the accommodation space 230.

  As shown in FIG. 6, an accommodation groove 241 is formed on one surface of the bottom wall side connecting portion 24. Two bottom wall side connection holes 243 are formed in the bottom portion 242 of the housing groove portion 241. One surface of the bottom wall 221 has a groove 229 formed so as to surround the elongated hole 225 and the two housing grooves 241. A seal member 81 is accommodated in the groove portion 229.

  As shown in FIG. 2, the side wall 222 is erected on two sides of the bottom wall 221 parallel to each other on the side opposite to the bottom wall side connecting portion 24 and is formed in a sector shape. An opening 228 is formed in one of the two side walls 222. The opening 228 communicates with the intake passage 11 of the intake pipe 10 and the accommodation space 230 by connecting to the intake pipe 10 (see FIG. 1).

As shown in FIGS. 2 and 3, the lid connecting flange portion 224 is formed along the side wall 222 from one leg orthogonal to the bottom side of the bottom wall 221. The lid connecting flange 224 is formed so as to expand in a direction orthogonal to the bottom wall 221 and the side wall 222. The lid portion connecting flange portion 224 is formed in a shape corresponding to the accommodating portion connecting flange portion 215. In the present embodiment, the accommodating portion side protruding rib 224 and the lid portion side protruding rib 215 are formed in a “mountain” shape as viewed in the IV direction (see FIG. 5). The accommodating part side welding rib 227 is formed in the accommodating part side protrusion rib 224 on the opposite side to the bottom wall 221, the side wall 222, and the arc wall 223 (refer FIG. 12). The lid part side welding rib 219 and the accommodating part side welding rib 227 are for welding the lid part 21 and the accommodating part 22, and disappear after the lid part 21 and the accommodating part 22 are welded.
The arc wall 223 is formed from the other leg of the bottom wall 221 along the arc of the side wall 222 to the end of the accommodating portion side protruding rib 224 opposite to the bottom wall 221.

  The accommodation space 230 is a space surrounded by the flat plate portion 213, the peripheral edge portion 214, the bottom wall 221, the side wall 222, and the arc wall 223 by the contact of the accommodation portion connection flange portion 215 and the lid portion connection flange portion 224. say.

As shown in FIGS. 7 and 8, the intercooler 25 includes a plurality of cooling panels 251, a plurality of cooling fins 252 as heat exchange units, a buffer unit 253, a supply unit 254, and a discharge unit 255.
The cooling panel 251 is formed in an L shape and has a main body portion 256 and a protruding portion 257. The main body 256 can be accommodated in the accommodating space 230 in a posture perpendicular to the bottom wall 221 of the accommodating portion 22, and the protruding portion 257 can be accommodated in the branch passage 216 in a posture perpendicular to the flat plate portion 213 of the lid portion 21. The branch passage 216 is formed longer than the branch passage 216. An L-shaped low-temperature refrigerant flow path 25L and a high-temperature refrigerant flow path 25H are formed inside the cooling panel 251. The low-temperature refrigerant flow path 25L and the high-temperature refrigerant flow path 25H are connected to each other on the protruding portion 257 side and connected to the buffer portion 253 on the main body portion 256 side.

  The buffer unit 253 includes a supply buffer chamber 25BI and a discharge buffer chamber 25BO. The supply buffer chamber 25BI communicates with the low-temperature refrigerant flow paths 25L of the plurality of cooling panels 251 and the discharge buffer chamber 25BO communicates with the high-temperature refrigerant flow paths 25H of the plurality of cooling panels 251.

The supply unit 254 is provided on the opposite side of the buffer unit 253 from the cooling panel 251 and has a supply port 258 communicating with the supply buffer chamber 25BI.
The discharge unit 255 is provided on the opposite side of the buffer unit 253 from the cooling panel 251 and has a discharge port 259 communicating with the discharge buffer chamber 25BO.

The refrigerant is supplied from the supply port 258, and is discharged from the discharge port 259 via the supply buffer chamber 25BI, the low-temperature refrigerant channel 25L, the high-temperature refrigerant channel 25H, and the discharge buffer chamber 25BO.
The cooling fins 252 are formed in a wave shape, and the apex P is in contact with the cooling panel 251 (see FIG. 7), so that the cooling panel 251 has both ends of the main body 256 and the ends of the protrusions 257 on the intake port 311 side. (See FIG. 8).

  As shown in FIG. 9, the connecting means 26 includes a plate member 261, a plurality of nut portions 262, and a plurality of bolts 263. Here, the nut portion 262 and the bolt 263 constitute “fixing means” in the claims. The connecting means 26 fixes the intercooler 25 to the bottom wall 221 of the intake manifold 23.

The plate member 261 has two positioning holes 264 and two connecting portions 265. The two connecting portions 265 are formed on both sides in the direction orthogonal to the direction in which the two positioning holes 264 are arranged.
As shown in FIG. 10, the connecting portion 265 is recessed from one surface of the plate member 261 and protrudes from the other surface. An accommodation recess 266 is formed on one surface of the connecting portion 265 that is recessed. Two connecting holes 268 are formed in the bottom 267 of the receiving recess 266. The two connecting holes 268 are formed so as to correspond to the two bottom wall side connecting holes 243. The plate member 261 is fixed to the intercooler 25 so that the housing recess 266 faces the intercooler 25 in a state where the supply part 254 and the discharge part 255 of the intercooler 25 are inserted into the positioning hole 264 (see FIG. 8). ).

  The nut portion 262 has a screw hole 269 and is fixed to the bottom portion 267 of the housing recess 266 by brazing so that the screw hole 269 and the connection hole 268 correspond to each other. The bolt 263 is used to fix the connecting means 26 to the bottom wall 221 of the accommodating portion 22.

A method of assembling the intake device 20 according to the present embodiment will be described with reference to FIGS.
First, the step of fixing the plate member 261 to the intercooler 25 will be described. With the accommodation recess 266 facing the intercooler 25, the supply unit 254 and the discharge unit 255 are inserted into the positioning hole 264. The plate member 261 is fixed to the intercooler 25 by brazing.

  Next, the step of fixing the intercooler 25 to the bottom wall 221 of the accommodating portion 22 will be described. The intercooler 25 is inserted so that the supply part 254 and the discharge part 255 of the intercooler 25 are inserted into the long holes 225 of the bottom wall 221 and the connecting part 265 of the plate member 261 is received in the receiving groove part 241 of the bottom wall side connecting part 24. It is installed between the bottom wall 221 of the accommodating part 22 and the arc wall 223. The intercooler 25 is fixed to the bottom wall 221 of the housing portion 22 by screwing the bolt 263 into the nut portion 262 from the bottom wall side connection hole 243. The nut portion 262 and the bolt 263 are located on the opposite side of the intercooler 25 with respect to the contact surface on which the plate member 261 and the intercooler 25 abut.

  Finally, the step of integrating the lid portion 21 and the accommodating portion 22 will be described. The protruding portion 257 of the cooling panel 251 is inserted into the branch passage 216 of the lid portion 21. An elastic member 82 is provided between the protrusion 257 of the cooling panel 251 and the inner wall of the branch passage 216. The accommodating portion connecting flange portion 215 of the lid portion 21 and the lid portion connecting flange portion 224 of the accommodating portion 22 are brought into contact with each other, and welding is performed, for example, by vibration welding. Then, the cover part side welding rib 219 and the storage part side welding rib 227 melt | dissolve, and the storage part connection flange part 215 and the cover part connection flange part 224 connect. Thereby, the cover part 21 and the accommodating part 22 are united in the state which accommodates the intercooler 25 in the accommodating space 230. FIG.

Hereinafter, the effect of this embodiment will be described.
(1) In the present embodiment, the protruding portion 257 of the cooling panel 251 of the intercooler 25 protrudes to the intake port 311. Thereby, a part of the low-temperature refrigerant flow path 25L and the high-temperature refrigerant flow path 25H protrude into the intake port 311. For this reason, not only the cooled intake air is prevented from being reheated by the intake port 311, but also the internal EGR gas can be efficiently cooled, and the cooling performance can be improved.
Further, since the intake manifold 23 includes the lid portion 21 and the accommodating portion 22, the L-shaped intercooler 25 is placed in the accommodating space 230 between the lid portion 21 and the accommodating portion 22 and then accommodated with the lid portion 21 and the accommodating portion 22. The part 22 can be welded. Thereby, the process which installs the L-shaped intercooler 25 between the cover part 21 and the accommodating part 22 can be performed easily, and the assembly | attachment property of the intake device 20 can be improved.

  (2) In the present embodiment, the supply unit 254 and the discharge unit 255 are adjacent to each other and inserted into the long hole 225 of the bottom wall 221. Here, since the long hole 225 is formed long in the direction in which the supply unit 254 and the discharge unit 255 are arranged, the opening area can be reduced as compared with the case where the long hole 225 is formed in a single circle. Therefore, the required seal range can be reduced. This leads to an increase in the sealing effect.

  (3) In this embodiment, the intercooler 25 is fixed to the bottom wall 221 of the intake manifold 23 by the connecting means 26 fixed to the intercooler 25. Thereby, the reduction of the dead space of the intercooler 25 can be suppressed.

  (4) In the present embodiment, the nut portion 262 and the bolt 263 are located on the opposite side of the intercooler 25 with respect to the contact surface between the intercooler 25 and the plate member 261. Thereby, the dead space of the intake manifold 23 can be reduced, and the cooling performance of the intercooler 25 can be further enhanced.

  (5) In the present embodiment, a seal member 81 is provided between the plate member 261 and the bottom wall 221. Thereby, the sealing effect between the connection means 26 and the bottom wall 221 can be improved.

  (6) In this embodiment, the lid part 21 and the accommodating part 22 are welded by welding the lid part side welding rib 219 of the accommodating part connection flange part 215 and the accommodating part side welding rib 227 of the lid part connecting flange part 224. Unite. Thereby, the adhesiveness of the cover part 21 and the accommodating part 22 can be improved.

  (7) In the present embodiment, the elastic member 82 is provided between the inner wall of the branch passage 216 of the lid portion 21 and the intercooler 25. Thereby, the sealing performance between the intake port 311 and the lid portion 21 can be improved and the vibration of the intercooler 25 can be reduced.

(Other embodiments)
In the above embodiment, an example in which the intake device is applied to a three-cylinder engine system has been described. On the other hand, in another embodiment, the intake device may be applied to a multi-cylinder engine system such as two cylinders or four cylinders.

  In the said embodiment, the example which applies a nut part and a volt | bolt as a fixing means was shown. On the other hand, in other embodiments, caulking or the like may be applied as the fixing means.

  In the said embodiment, the example which welds a cover part and an accommodating part by vibration welding was shown. On the other hand, in other embodiments, the lid portion and the accommodating portion may be welded by laser welding or ultrasonic welding. Moreover, it is good also as integrating a cover part and an accommodating part by screwing.

  In the said embodiment, the example which forms the elongate hole which can insert a supply part and a discharge part simultaneously in an accommodating part was shown. On the other hand, it is good also as forming in the accommodating part the hole which a supply part and a discharge part can each insert.

  In the said embodiment, the accommodation recessed part was formed in the connection means, and the nut part was shown in the bottom part of the accommodation recessed part of a connection means. On the other hand, in other embodiment, it is good also as fixing a nut part on the opposite side to an intercooler with respect to a board member.

In the said embodiment, the example which provides a nut part in a board member was shown. On the other hand, in another embodiment, it is good also as performing a burring process with respect to a board member, and forming a screw hole in a board member.
As mentioned above, this invention is not limited to the said embodiment, In the range which does not deviate from the summary, it is applicable to various embodiment.

20 ... Intake device,
21 ... lid,
22 ... accommodating part,
25 ... Intercooler (cooling device)
26 ... connecting means,
30 ... Engine (internal combustion engine),
32 ... Cylinder head,
25H ... high temperature refrigerant flow path (refrigerant flow path),
25L ... low temperature refrigerant flow path (refrigerant flow path),
215... Accommodating portion connecting flange portion
216: branch passage,
224: Lid connecting flange,
225 ... oblong hole (through hole),
230 ... accommodation space,
252 ... Cooling fin (heat exchange part),
254 ... supply section,
255 ... discharge part,
262 ... nut part (fixing means),
263 ... bolt (fixing means),
311 ... Intake port,
317: Intake valve.

Claims (7)

An intake device (20) connected to a cylinder head (32) that internally forms a plurality of intake ports (311) that house intake valves (317) of an internal combustion engine (30),
A lid (21) having a plurality of branch passages (216) corresponding to the intake ports;
A housing portion (230) formed between the lid portion and a through-hole (225) formed in a direction intersecting a plane in which a plurality of the branch passages are arranged to communicate the housing space with the outside ( 22)
A plurality of refrigerant channels (25H, 25L) that are accommodated in the accommodating space and through which the refrigerant flows, a supply unit (254) that supplies the refrigerant to the refrigerant channel, and a discharge unit that discharges the refrigerant in the refrigerant channel (255), and a heat exchange section (252) provided between the plurality of refrigerant flow paths, a part of the refrigerant flow paths project into the intake port through the branch passage, and the supply section and the And a cooling device (25) through which the discharge portion passes through the through hole. The supply unit and the discharge unit are adjacent to each other,
The through hole is a long hole formed such that the length in the arrangement direction of the supply section and the discharge section is longer than the length in a direction orthogonal to the arrangement direction of the supply section and the discharge section. The intake device according to claim 1.   It has a positioning hole (264) corresponding to the supply part and the discharge part, and a fixing means (262, 263) for fixing to the storage part, and the supply part and the discharge part are inserted into the positioning hole. The intake device according to claim 1 or 2, further comprising connecting means (26) fixed to the cooling device in a state.   The intake device according to claim 3, wherein the fixing means of the connecting means is located on a side opposite to the cooling device with respect to a contact surface between the cooling device and the connecting means.   The intake device according to any one of claims 3 to 4, wherein a seal member (81) is provided between the coupling means and the accommodating portion.   The intake device according to any one of claims 1 to 5, wherein the lid portion and the accommodating portion are integrally formed by welding in a state where the cooling device is accommodated in the accommodating space. .   The intake device according to any one of claims 1 to 6, wherein an elastic member (82) is provided between an inner wall of the branch passage of the lid and the cooling device.

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