JPH11159354A - Intake device for internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily form a warm water path for imparting warm heat to the valve body of a throttle device on an intake manifold side. SOLUTION: A recessed portion 6 is formed on an abutting face 4B to the flange portion 8B of an intake manifold 7 in the flange portion 4A of a throttle device 3. Other recessed portion 13 is formed at a position corresponding to the recessed portion 6 on the abutting face 8C, and a space portion partitioned between the recessed portion 6, 13 is formed as a warm water sump 17. In the flange portion 8B a supply path 11 and a drainage path 15 are provided so as to communicate with the warm water sump, and a warm water path 10 is composed of the supply path 11 and the drainage path 15. The warm water path 10 is integrally molded together with the intake manifold 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake system for an internal combustion engine suitable for use in an intake system of, for example, an automobile engine.

[0002]

2. Description of the Related Art Generally, an internal combustion engine such as an automobile engine is provided with an intake device for sucking external intake air into a combustion chamber of the engine. An intake device for an engine of this type according to the related art includes a throttle device having a cylindrical body having an intake passage formed therein and having a valve body for opening and closing the intake passage in the body. One side is abutted against the body end face of the slot device, and the other side is constituted by an intake manifold or the like extending toward the combustion chamber of the engine.

In this type of prior art engine intake system, a valve body is opened by depressing an accelerator pedal in a cab, whereby intake air corresponding to the operation amount of the accelerator pedal is externally supplied to an air cleaner. And the like, flows into the intake manifold, and the intake air is drawn into the combustion chamber of the engine from the intake manifold.

Here, when traveling in a cold region or the like, since the intake air becomes cold air and is sucked into the intake passage of the throttle device, water droplets adhering to the valve body at this time are formed between the valve body and the body. In some cases, the valve may freeze, and the normal opening and closing operation of the valve body may be hindered.

In this prior art, a hot water passage is provided on the body side of the throttle device, and the heat from the hot water passage is transmitted to the valve body through the body.
Freezing that occurs on the valve body side is suppressed.

[0006]

By the way, in the above-mentioned intake system according to the prior art, the body of the throttle device is formed of an aluminum material, and a hot water passage provided in the body is formed by cutting the body with a drill or the like. Is formed. For this reason, there is a problem that it is troublesome to perform the processing of the hot water passage on the body made of the aluminum material, and that a relatively long time is required for the operation, and that the overall workability is deteriorated.

In this prior art, a pipe to which an external pipe for hot water supply / discharge is connected is press-fitted into an upstream opening and a downstream opening of a hot water passage provided in a body of a throttle device. At the same time, the pipe is fixed to the hot water passage using an adhesive or the like. For this reason,
The connection work for connecting the pipe to the body is troublesome, the workability is reduced, and the overall man-hour required for connecting the pipe is increased, resulting in a high production cost.

The present invention has been made in view of the above-mentioned problems of the prior art. In the present invention, an intake manifold is formed of a resin material, and a conduit portion for supplying / discharging hot water to / from a throttle device is provided on the intake manifold side. It is an object of the present invention to provide an intake device for an internal combustion engine which can be easily formed, reduces the manufacturing cost when forming a conduit portion, and improves the overall workability.

[0009]

According to a first aspect of the present invention, there is provided an air intake system for an internal combustion engine having a tubular body having an intake passage formed therein, wherein the body is provided with an intake passage. A throttle device provided with a valve element for opening and closing the intake passage; an intake manifold formed of a resin material and attached to an end surface of the throttle device in abutment; and an abutment between the intake manifold and the body of the throttle device It is provided with a hot water reservoir provided on the surface side, through which hot water can flow, and a hot water conduit provided in the intake manifold for supplying and discharging hot water to and from the hot water reservoir.

[0010] With the above structure, the hot water from the conduit portion is always supplied and discharged into the hot water reservoir provided on the side of the abutment between the intake manifold and the body of the throttle device.
Thereby, the heat from the hot water reservoir can be transmitted to the valve body through the body. In addition, the entire intake manifold, including the conduit, can be easily molded with resin,
Special processing (such as cutting) for forming the conduit portion becomes unnecessary.

Further, in the invention according to claim 2, the conduit portion is formed in the intake manifold and supplies a cooling water for an internal combustion engine as hot water to the hot water reservoir, and the water supply passage is separated from the water supply passage. A drain formed in the intake manifold to discharge hot water in the hot water pool to the internal combustion engine side.

Thus, while supplying the cooling water for the internal combustion engine as hot water from the intake manifold to the hot water reservoir through the water supply passage in the conduit portion, the hot water supplied to the hot water reservoir is supplied to the internal combustion engine through the drainage passage. Can be discharged to the side.

According to a third aspect of the present invention, there is provided an intake system for an internal combustion engine having a tubular body having an intake passage formed therein, and a throttle provided in the body to open and close the intake passage. An intake manifold formed of a resin material, having a conduit member accommodating portion, and attached to the body end face of the throttle device in abutting manner, and provided on an abutting surface between the intake manifold and the body of the throttle device. And a hot water reservoir through which hot water can flow, and a hot water conduit member removably provided in the conduit member accommodating portion of the intake manifold for supplying and discharging hot water to and from the hot water reservoir.

[0014] With the above configuration, the intake manifold includes:
The conduit member can be integrally attached via the conduit member housing. Then, the hot water from the conduit member is always supplied and discharged into the hot water reservoir provided on the side of the abutment surface between the intake manifold and the body of the throttle device. The heat from the hot water reservoir can be transmitted to the valve body via the body.

Further, the conduit member can be formed separately from the intake manifold, so that when the intake manifold is formed, it is not necessary to form the conduit portion integrally with the intake manifold as in the first aspect of the present invention. Thus, the overall shape of the mold for the intake manifold can be simplified.

Further, according to the invention of claim 4, the intake manifold is integrally formed with a flange portion which is attached to the body end surface of the throttle device in an abutting state, and the flange portion has an abutting surface side with the body. And a fitting hole that is open at the opening, and the fitting hole is configured as the conduit member accommodating portion.

Thus, the conduit member can be housed in a state fitted in the fitting hole provided in the flange portion of the intake manifold, and the assembling property when the conduit member is assembled to the flange portion can be improved.

On the other hand, in the invention of claim 5, the conduit member is detachably fitted in the fitting hole, and a water supply hole and a discharge hole for supplying and discharging hot water to and from the hot water pool are formed therein. A formed fitting piece, a water supply pipe provided integrally with the fitting piece and supplying cooling water of the internal combustion engine as hot water to the water supply hole, and provided integrally with the fitting piece at a distance from the water supply pipe. And a discharge pipe for discharging hot water from the drain hole to the internal combustion engine side.

Thus, the fitting piece of the conduit member can be attached to the flange portion while being fitted in the fitting hole of the intake manifold, so that the assemblability of the conduit member is improved as in the fourth aspect of the present invention. be able to. Then, while supplying the cooling water of the internal combustion engine from the water supply hole to the abutment surface side of the flange portion and the body of the throttle device through the water supply pipe, the hot water supplied to the abutment surface side is discharged from the discharge hole through the discharge pipe. Through the internal combustion engine.

Further, in the invention according to claim 6, the hot water reservoir is formed by a concave portion formed in the body of the throttle device and opened on the side of the abutting surface with the intake manifold.

Thus, the hot water supplied between the abutment surfaces of the body of the throttle device and the flange portion of the intake manifold can be guided into the concave portion of the flange portion, and from the concave portion to the valve body side via the body. The heat transfer efficiency of the transmitted heat can be increased.

Further, in the invention according to claim 7, the hot water reservoir is formed in the intake manifold, and is constituted by a concave portion opened on the side of the abutting surface with the body of the throttle device.

Further, according to the present invention, a single seal member comprising the seal portion on the intake passage side and the seal portion on the hot water reservoir side is mounted on the abutting surface side of the body and the intake manifold. doing.

This eliminates the need to separately form the seal portion on the intake passage side and the seal portion on the hot water pool side.
By providing the seal member on the intake manifold side, the seal groove for the seal member can be formed integrally with the intake manifold.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an intake device for an internal combustion engine according to the present invention will be described below in detail with reference to FIGS.

First, FIGS. 1 to 8 show a case where the intake device for an internal combustion engine according to the first embodiment of the present invention is applied to an engine for an automobile.

In the drawing, reference numeral 1 denotes an intake device provided in an engine room (not shown) of an automobile together with the engine 2. The intake device 1 is generally constituted by a throttle device 3 and an intake manifold 7, which will be described later. The outside air is taken into each combustion chamber (not shown) of the engine 2 as intake air.

Reference numeral 3 denotes a throttle device for increasing or decreasing the amount of air taken into the engine 2;
As shown in FIG. 3, a cylindrical body 4 made of a metal material or the like formed inside as an intake passage of the engine 2,
A valve body 5 and the like provided in the body 4 for opening and closing the intake passage in response to a depression operation of an accelerator pedal (not shown) are provided at one end side (the right end side in FIG. 2) of the body 4. Is equipped with an air cleaner (not shown) and the like.

Here, a flange 4A having a substantially rectangular outer shape is integrally formed on the outer periphery of the other end of the body 4, and the flange 4A has a flange portion of a flange portion of an intake manifold 7 described later. 8B is an abutment surface 4B with respect to 8B.

Reference numeral 6 denotes a concave portion on the body 4 side provided between the abutting surfaces 4B and 8C of the body 4 of the throttle device 3 and the intake manifold 7, and the concave portion 6 is, as shown in FIGS. It is formed as a substantially rectangular concave groove having a substantially concave cross section, and is provided so as to open to a later-described concave portion 13 provided on the abutment surface 8C. The recess 6 forms a part of a hot water reservoir 17 described later, and is configured to guide the hot water flowing through the hot water passage 10 toward the body 4.

Reference numeral 7 denotes an intake manifold which forms an intake passage of the engine 2 together with the body 4 of the throttle device 3. The intake manifold 7 is formed by injection molding a resin material as shown in FIGS. I have.
The intake manifold 7 has a tubular collector portion 8 having one open end 8A so as to communicate with the body 4, and a plurality of branch portions branching from the outer peripheral side of the collector portion 8 toward the engine 2 side. , And four end portions thereof communicate with the combustion chamber of the engine 2.

Here, on the outer peripheral side of the open end 8A of the collector portion 8, a flange portion 8B having a substantially rectangular outer shape is integrally formed as shown in FIGS. 4 to 8, and the flange portion 8B is The end face serves as an abutment surface 8C, and is integrally attached to the flange portion 4A of the body 4 in an abutment state.

10 is a flange 8 of the intake manifold 7
B shows a hot water passage as a conduit provided in B. The hot water passage 10 is composed of a water supply passage 11 and a drainage passage 15, which will be described later. It is configured to guide hot water into the interior.

Reference numeral 11 denotes a flange portion 8 of the intake manifold 7.
4 to 8, the water supply channel 11 extends in the flange portion 8B in parallel with the abutment surface 8C as shown in FIGS. 4 to 8, and the base end thereof becomes a water supply pipe 11A. It protrudes from the outer peripheral end face of the portion 8B.

The water supply pipe 11A is made of the same resin material as the intake manifold 7.
It is formed in one piece. In addition, the water supply pipe 11
A is a metal pipe, and when forming the intake manifold 7,
The metal pipe may be integrally formed by insert molding.

The water supply passage 11 has a distal end opening into a water supply chamber 13A of a recess 13 to be described later, and an external pipe 12 for supplying hot water is connected to the water supply pipe 11A, so that the cooling water for the engine 2 is provided. Is supplied into the hot water reservoir 17 as hot water.

Reference numeral 13 denotes a concave portion on the intake manifold 7 side provided between the abutting surfaces 4B and 8C of the body 4 of the throttle device 3 and the intake manifold 7, and the concave portion 13 corresponds to FIG.
As shown in FIG. 8, at a position facing the concave portion 6 on the body 4 side, the abutment surface 8C is formed as a substantially rectangular concave groove having a substantially concave cross section, and is formed on the abutment surface 4B. It is arranged so that it may open.

Here, a partition 14 is integrally formed at a longitudinally intermediate portion of the recess 13. And a room 13B. In addition, the partition 14
Is formed as a substantially rectangular plate extending in the depth direction in the recess 13, and one end (hereinafter, referred to as a protruding end) protrudes into the recess 6 by a certain dimension. Mated. A gap is formed between the projecting end of the partition wall 14 and the recess 6, and the water supply chamber 13 </ b> A and the drain chamber 13 </ b> B communicate with each other via the recess 6.

Reference numeral 15 denotes a drainage channel provided on the flange portion 8B of the intake manifold 7 away from the water supply channel 11, and the drainage channel 15 is located coaxially with the water supply channel 11, as shown in FIGS. Thus, it extends in the flange portion 8B in parallel with the abutment surface 8C. The distal end side of the water supply passage 11 serves as a drainage pipe 15A and projects from the outer peripheral end surface of the flange portion 8B in a direction opposite to the water supply pipe 11A.

Here, the drainage pipe 15A is the water supply pipe 1
1A, it is made of the same resin material as the intake manifold 7 and is formed integrally with the intake manifold 7. Note that the water supply pipe 11A may be a metal pipe, and the metal pipe may be integrally insert-molded when the intake manifold 7 is formed.

The drain passage 15 has a base end serving as a drain chamber 13B of the recess 13 and opening into the recess 6 on the body 4 side. The drain pipe 15A has an external pipe 1 for discharging hot water.
The connection of 6 causes the hot water supplied into the hot water reservoir 17 to be discharged to the engine 2 via the external pipe 16.

Reference numeral 17 denotes a hot water reservoir for storing hot water flowing through the hot water passage 10 in a flowing state.
It is configured as a space defined by the recess 6 on the side of the intake manifold 7 and the recess 13 on the side of the intake manifold 7. The body 4 of the throttle device 3 is heated by the hot water stored in the hot water reservoir 17.

Reference numeral 18 denotes a flange 8 of the intake manifold 7
The seal groove 18 is formed on the abutment surface 8C so as to surround the periphery of the open end 8A from the outside, as shown in FIG. Groove 18B formed in the abutment surface 8C so as to surround the ring groove 18A from the outside, the ring groove 18A and the rectangular groove 1
8B and a notched groove 18C connected between the notched grooves 18C.

Reference numeral 19 denotes a seal member provided between the abutment surfaces 4B and 8C between the throttle device 3 and the intake manifold 7. The seal member 19 is, as shown in FIGS.
Ring seal portion 19A disposed in ring groove portion 18A
And the rectangular seal portion 1 disposed in the rectangular groove portion 18B.
9B, the ring seal portion 19A and the rectangular seal portion 19
B are connected to each other, and are integrally formed with a connection seal portion 19C provided in the notch groove portion 18C.

The ring seal portion 19A of the seal member 19 prevents the intake air flowing in the intake passage of the body 4 and the intake passage of the intake manifold 7 from leaking outside, and the rectangular seal portion 19B Recess 6,
The configuration prevents hot water from leaking from the outside to the outside.

The intake device of the engine 2 according to the present embodiment has the above-described configuration, and its operation will be described next.

First, when the accelerator pedal is depressed in the cab, the valve element 5 of the throttle device 3 opens,
At this time, the intake air according to the operation amount flows into the collector section 8 of the intake manifold 7 from outside via an air cleaner or the like. Then, the intake air that has flowed into the collector section 8 is taken into each combustion chamber of the engine 2 through each manifold section 9.

By the way, when traveling in a cold region or the like,
Since the intake air becomes cool air and is sucked into the body 4 of the throttle device 3 via the valve body 5, water droplets attached to the valve body 5 at this time freeze between the body 4 and the valve body 5. As a result, the normal opening and closing operation of the valve body 5 may be hindered.

However, in the present embodiment, the water supply channel 11 and the drain channel 1 are provided on the flange 8B of the intake manifold 7.
5 is provided between the water supply passage 11 and the drainage passage 15 of the hot water passage 10 between the abutment surfaces 4B and 8C between the body 4 of the slot device 3 and the intake manifold 7. Since the hot water reservoir 17 is provided, the hot water flowing from the water supply channel 11 to the drainage channel 15 can be temporarily stored in the hot water reservoir 17 in a flowing state, and the hot water is stored in the hot water reservoir 17. The body 4 and the valve body 5 can be heated by the warm water. And, as described above, the situation where the body 4 and the valve body 5 freeze can be eliminated,
Even when traveling in a cold region, the throttle operation by the valve element 5 can be performed smoothly.

Further, the hot water sump 17 is inserted into the recess 6 on the body 4 side.
And a recess 13 on the intake manifold 7 side. The inside of the recess 13 is provided with a water supply chamber 13A and a drain chamber 13 via a partition wall 14.
B, and one end side of the partition wall 14 is configured to protrude toward the recess 6, so that all the warm water supplied from the water supply channel 11 into the water supply chamber 13 </ b> A is directed in the direction of arrow A in FIG. 8. And into the recess 13 on the body 4 side.
Thereby, the heat transfer efficiency of the heat transmitted from the hot water reservoir 17 to the body 4 can be increased, and the body 4 and the valve body 5 can be efficiently heated.

In addition, the concave portion 1 forming a part of the hot water reservoir 17
3 and the hot water passage 10 are formed integrally with the intake manifold 7, so that special processing (cutting or the like) for forming the concave portion 13 and the hot water passage 10 becomes unnecessary, and the water supply pipe 11A and the drainage water are discharged. It is possible to omit a troublesome work of attaching the pipe 15A to the flange portion 8B side after the formation of the intake manifold 7 and to improve workability at the time of manufacturing the intake manifold 7 and reduce the overall manufacturing cost and the like. Can be.

The flange 8 of the intake manifold 7
Since the seal groove 18 for the seal member 19 is formed on the B side, the seal groove 18 can also be formed integrally with the hot water passage 10 on the flange portion 8B side when the intake manifold 7 is formed. In addition, workability at the time of manufacturing the intake manifold 7 can be improved.

Further, a rectangular seal portion 1 for sealing the seal member 19 between the ring seal portion 19A and the hot water passage 10 side.
9B, the ring seal portion 19A and the rectangular seal portion 19B do not need to be formed separately, and the number of steps required to form the seal member 19 can be reduced. Member 19
Operability at the time of manufacture of the device can be improved.

Next, FIGS. 9 and 10 show a second embodiment according to the present invention. In this embodiment, the same components as those in the first embodiment are designated by the same reference numerals. The description is omitted. However, a feature of the present embodiment is that a hot water passage 21 as a conduit portion is provided on the flange portion 8B side of the intake manifold 7 instead of the hot water passage 10 described in the first embodiment. Are formed as water supply holes 22B and drain holes 23B in the concave portion 6 on the body 4 (throttle device 3) side, respectively.
B and the drain hole 23B constitute the hot water reservoir 24.

Here, the hot water passage 21 comprises a water supply passage 22 and a drainage passage 23, similarly to the hot water passage 10 according to the first embodiment. And the water supply channel 22
Abutment surface 8 in flange portion 8B of intake manifold 7
It extends in parallel with C, and its proximal end protrudes outside as a connection pipe 22A.

However, the water supply passage 22 has a substantially rectangular water supply hole 22B at the tip end and opens into the recess 6 and an open end at the protrusion end 22B1 in the form of a rectangular tube. The first embodiment is different from the first embodiment in that the first embodiment protrudes by a certain dimension.

The drainage channel 23 extends coaxially with the water supply channel 22 and extends through the flange 8B. The distal end of the drainage channel 23A serves as a drainage pipe 23A and protrudes from the outer peripheral end surface of the flange 8B.

However, the drainage channel 23 has a substantially rectangular drainage hole 23B on the base end side and opens into the concave portion 6 at a position different from the water supply hole 22B, and the opening end has a rectangular cylindrical projection. It differs from that of the first embodiment in that it becomes an end 23B1 and protrudes into the recess 6 by a certain size.

Further, the hot water reservoir 24 is provided with the water supply hole 22.
B, is configured as a space defined between the drain hole 23 </ b> B and the recess 6 on the body 4 side, temporarily stores the hot water flowing through the hot water passage 21 in the hot water pool 24, and moves the body 4 and the valve element 5. It is configured to heat.

Thus, in the present embodiment having the above-described structure, substantially the same operation and effect as those of the first embodiment can be obtained.

FIGS. 11 to 13 show a third embodiment according to the present invention. The feature of this embodiment is that a fitting hole is provided in the intake manifold on the side of the abutment surface with the throttle device. In addition, a conduit member composed of a fitting piece provided with a water supply pipe, a water supply hole, a drainage pipe, and a drainage hole is provided in the fitting hole in a detachable manner. Note that, in the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In the figure, reference numeral 31 denotes an intake device according to the present embodiment, and 32 denotes an intake manifold which constitutes the intake device 31 together with the throttle device 3.
2 comprises a collector section 33 and each manifold section 34 (only one is shown) in substantially the same manner as the intake manifold 7 described in the first embodiment.
A flange portion 33B that abuts against the abutment surface 4B of the throttle device 3 is integrally formed with the opening end 33A of the throttle device 3.

Here, the abutting surface 33C of the flange portion 33B
Is formed with a fitting hole 33D as a conduit member accommodating portion into which a fitting piece 36A of the conduit member 36 described later is fitted. The fitting hole 33D is formed as a bottomed hole having a substantially rectangular inner shape as shown in FIG. 12, and is provided so as to open to the abutment surface 4B of the throttle device 3. A ring groove 35 is formed in the abutment surface 33C around the open end 33A, and a cutout groove 35A is formed in the ring groove 35 to be connected to a rectangular groove 37 of a conduit member 36 described later. I have.

Reference numeral 36 denotes a fitting hole 33 of the intake manifold 32.
A conduit member detachably provided in D is shown, and the conduit member 36 is formed of a metal material or a resin material as shown in FIGS.

The conduit member 36 is fitted in the fitting hole 33.
D, and a water supply pipe 36B projecting downward from the outer peripheral end face of the fitting piece 36A in FIG.
And the fitting piece 3 so as to communicate with the water supply pipe 36B.
A water supply hole 36C formed in 6A, a drainage pipe 36D protruding from an outer peripheral end surface of the fitting piece 36A in parallel with the water supply pipe 36B, and a drainage formed in the fitting piece 36A so as to communicate with the drainage pipe 36D. And a hole 36E.

The water supply hole 36C and the drainage hole 36E
Are opened into the concave portion 6 on the body 4 side, and each open end is formed into a rectangular cylindrical protruding end 36C1, 36E1, and protrudes into the concave portion 6 by a certain dimension. The water supply pipe 36B and the water supply hole 36C constitute a water supply passage for supplying cooling water for the engine 2 as hot water into the concave portion 6 of the throttle device 3, and the drain pipe 36D and the drain hole 36E are formed inside the concave portion 6. Hot water supplied to the engine 2
It constitutes a drainage channel to discharge to the side.

Further, the fitting piece 36A has a water supply hole 3
A rectangular groove 37 is formed so as to surround 6C and the drain hole 36E from the periphery, and another rectangular groove 37A is formed in the rectangular groove 37 so as to be connected to the ring groove 35 through the concave groove 35A of the intake manifold 32. I have. The rectangular groove 37 forms a seal groove for the seal member 19 together with the ring groove 35.

Reference numeral 38 denotes a hot water reservoir for storing the hot water flowing through the conduit member 36 in a flowing state. The hot water reservoir 38 is a space defined by the water supply hole 36C, the drain hole 36E, and the recess 6 on the body 4 side. It is configured.

Thus, also in the present embodiment configured as described above, the body 4 of the throttle device 3 can be heated by the hot water stored in the hot water sump 38, which is almost the same as in the first embodiment. The operation and effect of the present invention can be obtained.

In this embodiment, in particular, the fitting piece 36A of the conduit member 36 is inserted into the fitting hole 33D of the intake manifold 32.
Since it is configured to be detachably provided inside, the conduit member 36 can be formed separately from the intake manifold 32. Thereby, when forming the intake manifold 32, the water supply pipe 36
B, water supply hole 36C, drainage pipe 36D and drainage hole 36
It is not necessary to form E, whereby the shape of the mold used for molding the intake manifold 32 can be simplified, and the manufacturing cost of the intake manifold 32 can be further reduced.

In the first embodiment, the hot water reservoir 17 is constituted by the recess 6 on the body 4 side and the recess 13 on the intake manifold 7 side, and one end of the partition 14 is formed in the recess 6 on the body 4 side. 14, the concave portion 6 on the body 4 side is abolished and the concave portion 41 is provided only on the throttle device 3 side, for example, as in a modified example shown in FIG. May be.

That is, in this modification, the throttle device 3
The recess 6 is eliminated from the abutting surface 4B ', and the recess 41 on the intake manifold 7 side is configured as a hot water pool. The concave portion 41 is defined by a water supply chamber 41A on the water supply channel 11 side and a drainage chamber 41B on the drainage channel 15 side via the partition wall 42, and the gap between the water supply chamber 41A and the drainage chamber 41B is formed by the partition wall 42. They are communicated with each other via a gap between the mating surface 4B '.

In the first embodiment, the partition 1
Although the configuration in which the partition wall 4 is formed integrally with the recess 13 has been described, a configuration in which the partition wall 14 is fixed in the recess 13 after the formation of the intake manifold 7 may be used instead.

Furthermore, in each of the above embodiments, the case where the air intake device 1 (31) is used for an automobile engine has been described as an example. However, the present invention is not limited to this. It may be applied to an internal combustion engine such as a machine.

[0075]

As described in detail above, according to the first aspect of the present invention, a hot water reservoir is provided on the side of the abutting surface between the intake manifold and the body of the throttle device. Since the conduit portion for supplying and discharging the air is provided, the conduit portion can be easily integrated with the intake manifold and can be easily molded with a resin. As a result, a special portion for forming the conduit portion as described in the related art can be obtained. Processing becomes unnecessary, and mounting work for mounting a pipe for external piping to the intake manifold becomes unnecessary, so that workability at the time of manufacturing the intake manifold can be improved, and overall manufacturing costs and the like can be reduced. .

According to the second aspect of the present invention, the water supply passage for supplying hot water to the hot water sump and the drainage passage for discharging the hot water in the hot water sump to the internal combustion engine constitute a conduit portion. The entire intake manifold including the drainage channel can be resin-molded, and substantially the same effects as those of the first aspect can be obtained.

Further, according to the third aspect of the present invention, since the conduit member for supplying hot water to the hot water reservoir is detachably provided on the intake manifold, the conduit member can be formed separately from the intake manifold. Thus, when forming the intake manifold, it is not necessary to integrally form a conduit portion in advance on the intake manifold side, so that the entire shape of the mold for the intake manifold can be simplified, and the manufacturing cost of the intake manifold can be reduced. It can be further reduced.

Further, according to the fourth aspect of the present invention, a fitting hole is provided in a flange portion of the intake manifold which abuts on an end surface of the body of the throttle device, and a conduit member is detachably provided in the fitting hole. Therefore, the conduit member can be easily assembled to the flange portion of the intake manifold via the fitting hole, and the assembling property of the conduit member can be improved.

On the other hand, according to the invention of claim 5, the water supply pipe,
Since a conduit member composed of a fitting piece provided with a water supply hole, a drain hole and a drain pipe in advance is detachably mounted in a fitting hole provided in a flange portion of the intake manifold, the water supply pipe is formed at the time of forming the intake manifold. It is not necessary to form the water supply hole, the drain hole and the drain pipe integrally on the flange side in advance, whereby substantially the same effect as the second aspect of the invention can be obtained. Also,
The fitting piece of the conduit member can be easily attached to the flange portion of the intake manifold with the fitting piece fitted in the fitting hole, whereby substantially the same effect as the invention of claim 4 can be obtained.

Further, in the invention of claim 6, since the body of the throttle device is provided with a concave portion which opens on the side of the abutting surface with the intake manifold, and the concave portion is constituted as a hot water reservoir,
Hot water supplied between the abutting surfaces of the body of the throttle device and the intake manifold can be stored in a flow state in the concave portion on the body side, so that the body and the valve body can be efficiently heated. .

Further, according to the invention of claim 7, since the intake manifold is provided with a concave portion which is opened on the side of the abutting surface with the body of the throttle device, and the concave portion is configured as a warm water reservoir, the same as the invention of claim 6 The body and the valve body can be efficiently heated by the hot water pool.

Further, in the invention of claim 8, a single seal member comprising a seal portion on the intake passage side and a seal portion on the hot water reservoir side is mounted on the abutting surface side of the body and the intake manifold. Therefore, it is not necessary to separately form each seal portion, the number of steps required to form the seal member can be reduced, and workability and the like at the time of manufacturing the seal member can be improved.

[Brief description of the drawings]

FIG. 1 is an external view showing an intake device for an engine according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view as seen from the direction of arrows II-II in FIG.

FIG. 3 is an enlarged sectional view as seen from the direction of arrows III-III in FIG. 2;

FIG. 4 is an enlarged cross-sectional view as seen from a direction indicated by arrows IV-IV in FIG. 2;

FIG. 5 is an exploded perspective view showing an intake manifold and a seal member in FIG. 4;

FIG. 6 is an exploded perspective view showing the throttle device and the intake manifold in FIG. 2 in an enlarged state.

FIG. 7 is a partial perspective view showing an enlarged state of a hot water passage in FIG. 6;

FIG. 8 is an enlarged sectional view as seen from the direction of arrows VIII-VIII in FIG. 2;

FIG. 9 is a sectional view showing an intake manifold of an intake device for an engine according to a second embodiment of the present invention, as viewed from the same direction as in FIG. 4;

FIG. 10 is a partial perspective view showing an enlarged state of a hot water passage in FIG. 9;

FIG. 11 is a cross-sectional view showing an intake manifold of an intake device for an engine according to a third embodiment of the present invention when viewed from the same direction as in FIG. 4;

FIG. 12 is an assembly view showing an intake manifold and a conduit member in FIG. 11;

FIG. 13 is an enlarged perspective view showing a conduit member in FIG. 12;

14 is a cross-sectional view of a hot water passage of an intake device for an engine according to a modification of the present invention, as viewed from the same direction as in FIG.

[Explanation of symbols]

 1, 31 intake device 2 engine (internal combustion engine) 3 throttle device 4 body 4B, 4B 'abutment surface (end surface) 5 valve body 6, 13, 41 concave portion 7, 32 intake manifold 8B, 33B flange portion 8C, 33C abutment Surface 10, 21 Hot water passage (conduit portion) 11, 22 Water supply passage 15, 23 Drainage passage 17, 24, 38 Hot water reservoir 19 Seal member 19A Ring seal portion 19B Rectangular seal portion 33D Fitting hole (conduit member housing portion) 36 Conduit Member 36A Fitting piece 36B Water supply pipe 36C Water supply hole 36D Drainage pipe 36E Drainage hole

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Munehiro Kudo 1370 Onna, Atsugi-shi, Kanagawa Prefecture

Claims (8)

[Claims] A throttle device having a cylindrical body having an intake passage formed therein and a valve body for opening and closing the intake passage provided in the body; and a throttle device formed of a resin material, An intake manifold attached to the end face of the body, a hot water reservoir provided on the abutting surface between the intake manifold and the body of the throttle device, through which hot water can flow, and supplying and discharging hot water to and from the hot water reservoir And a hot water conduit provided in the intake manifold. 2. The water supply passage formed in the intake manifold for supplying cooling water for an internal combustion engine as hot water to the hot water pool, and the hot water passage formed in the intake manifold at a distance from the water supply passage. 2. The intake device for an internal combustion engine according to claim 1, further comprising a drainage passage for discharging hot water in the reservoir to the internal combustion engine side. 3. A throttle device having a cylindrical body having an intake passage formed therein and a valve body for opening and closing the intake passage provided in the body, and a conduit member housing portion formed of a resin material. An intake manifold attached to the body end surface of the throttle device in abutting manner, and a hot water reservoir provided on the abutting surface between the intake manifold and the body of the throttle device, through which hot water can flow, An intake device for an internal combustion engine, comprising a hot water conduit member removably provided in the conduit member accommodating portion of the intake manifold for supplying and discharging hot water to and from the hot water reservoir. 4. The intake manifold is integrally formed with a flange portion which is attached to the body end surface of the throttle device in an abutting state, and the flange portion has a fitting hole opened on the abutting surface side with the body. 4. The intake device for an internal combustion engine according to claim 3, wherein the fitting hole is provided as the conduit member accommodating portion. 5. A fitting piece having a water supply hole for supplying and discharging warm water to and from the hot water reservoir and a discharge hole formed therein, wherein the conduit member is detachably fitted into the fitting hole. A water supply pipe provided integrally with the fitting piece and supplying cooling water for the internal combustion engine as hot water to the water supply hole; and a hot water from the drainage hole provided separately from the water supply pipe and provided integrally with the fitting piece. 5. An intake device for an internal combustion engine according to claim 4, comprising a discharge pipe for discharging the exhaust gas to the internal combustion engine side. 6. The throttle according to claim 1, wherein the hot water reservoir is formed in a body of the throttle device, and is formed by a concave portion which is opened on an abutting surface side with the intake manifold.
Or an intake device for an internal combustion engine according to 5. 7. The throttle device according to claim 1, wherein the hot water reservoir is formed in the intake manifold, and is formed by a concave portion that is opened on an abutting surface side with a body of the throttle device.
7. The intake device for an internal combustion engine according to 4, 5, or 6. 8. A single seal member comprising a seal portion on the intake passage side and a seal portion on the hot water pool side is mounted on an abutting surface side of the body and the intake manifold. , 3, 4, 5, 6 or 7.