JP2007332900A - Passage device and idle air quantity control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detachably connect a connector pipe to a housing while preventing dropping-out thereof. <P>SOLUTION: In this device including the housing 10 defining a passage 12, and the connector pipe 50 defining the passage and connected with the housing 10 to define a passage for distributing a fluid as the whole, the connector pipe 50 is detachably fitted to the housing 10, and the housing 10 includes a stopping member 60 regulating dropping-out of the connector pipe 50. According to this, dropping-out of the connector pipe 50 can be prevented only by fixing the stopping member 60 to the housing 10 after detachably fitting the connector pipe 50 to the housing 10, and its removal after assembling can be easily performed, so that repair of the device, reuse of a part, correction work of wrong assembling, or the like can be facilitated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a passage device including a connector pipe and a housing for defining a passage through which a fluid passes, and an idle air amount control device for an engine using the passage device.

As a conventional idle air amount control device and passage device, it is connected to one air chamber (housing), an open / close valve (ISC) connected to the air chamber, and an open / close valve housing to be applied to a four-cylinder engine. A suction connector pipe, four discharge connector pipes connected to the air chamber, a rubber hose connecting the suction connector pipe and the upstream intake system (silencer), four discharge connector pipes and four intake pipes There are four rubber hoses (bypass pipes) that communicate with each other, and when idling, bypass throttle valves arranged in the respective intake pipes to guide air from the upstream side to the downstream side of the intake system. (For example, refer to Patent Document 1).
That is,

  However, in this apparatus, the suction-side connector pipe and the discharge-side connector pipe are structured to be press-fitted into the air chamber and the housing, so that replacement or disassembly is not easy. In addition, since the suction side connector pipe and the discharge side connector pipe are formed as straight pipes (straightly), when connecting rubber hoses, the rubber hoses must be bent and connected, and piping space ( It is necessary to take up a wide space for outfitting. In addition, when the rubber hose is bent or bent in order to solve the problem of the piping space, the cost of the rubber hose increases, and it is necessary to set a dedicated rubber hose for each applied engine.

JP 2000-130261 A

  The present invention has been made in view of the circumstances of the above-described conventional apparatus, and its object is to simplify the structure, reduce the weight, reduce the cost, reduce the size, etc. The connector pipe can be removably assembled and can be prevented from coming off after assembly, the assembly work is easy, the piping direction can be freely selected, various piping layouts are possible, and An object of the present invention is to provide a passage device that can be improved and an idle air amount control device to which the passage device is applied.

A passage device according to the present invention includes a housing that defines a passage, and a connector pipe that defines the passage and is connected to the housing, and defines a passage through which fluid flows as a whole. The housing is provided with a retaining member for restricting the connector pipe from coming off.
According to this configuration, after the connector pipe is detachably fitted to the housing, the connector pipe can be prevented from falling off only by fixing the retaining member to the housing. In other words, when connecting the connector pipe to the housing, the connector pipe is detachably fitted without being bonded, press-fitted or screwed in, so that it can be easily removed after assembly, repairing the device, and re-parting the parts. It is possible to easily use or correct misassembly.

In the passage device having the above-described configuration, it is possible to adopt a configuration in which the retaining member has a restricting portion that restricts removal of the connector pipe, and the connector pipe has a restricted portion that is restricted by the restricting portion.
According to this configuration, the retaining member and the connector pipe are provided with the restricting portion and the restricted portion, respectively, so that the retaining action can be further ensured, and after the assembly, the restricting portion and the restricted portion can be prevented. It is possible to confirm the state of regulation in between.

In the passage device configured as described above, the restricting portion is defined by an inner edge portion that is formed in a plate shape with a predetermined thickness and is notched in a substantially arc shape, and the restricted portion is to be fitted with the inner edge portion. A configuration that is an annular groove formed on the outer periphery of the connector pipe can be employed.
According to this configuration, after the connector pipe is detachably fitted to the housing, the retaining member is attached so that the inner edge as the restricting portion is fitted into the annular groove, and then the retaining member is fixed to the housing (for example, a screw) The connector pipe and the retaining member can be easily attached and can be securely connected so that the connector pipe does not fall off.

In the passage device configured as described above, the connector pipe is formed by bending the front end side connected to the outside, the annular groove is formed in an irregular shape having a cross section other than a circle, and the inner edge portion is formed so as to sandwich the annular groove. It is possible to adopt the configuration.
According to this configuration, when connecting a bent or bent type connector pipe to the housing, after the connector pipe is detachably fitted to the housing, the retaining member is attached so that the inner edge is in close contact with the annular groove By simply fixing the connector pipe, it is possible to prevent the connector pipe from falling off and to orient the distal end side of the connector pipe connected to an external rubber hose or the like in a predetermined direction.

In the passage device having the above-described configuration, the connector pipe may have an annular seal groove on the outer peripheral surface of the region fitted to the housing.
According to this configuration, when the connector pipe is detachably fitted to the housing, a seal member such as an O-ring can be interposed in the seal groove, thereby improving the sealing performance of the passage and preventing fluid leakage and the like. Can be prevented.

In the passage device configured as described above, a plurality of connector pipes are arranged in parallel and detachably fitted to the housing, and the retaining member has a plurality of restricting portions that simultaneously restrict the plurality of connector pipes from coming off. In addition, the plurality of connector pipes may employ a configuration having a regulated portion that is regulated by one of the plurality of regulating portions.
According to this configuration, after the plurality of connector pipes are detachably fitted to the housing, only by attaching one retaining member so as to regulate each regulated portion corresponding to each regulating portion, At the same time, a plurality of connector pipes can be prevented from falling off, and the number of parts can be reduced and the structure can be simplified as compared with the case where a plurality of retaining members are provided.

An idle air amount control device according to the present invention opens and closes a communication path, a housing that defines a suction path for sucking air, a plurality of discharge paths for discharging air, a communication path that connects the suction path and the plurality of discharge paths. Air that is provided in the housing so as to be able to reciprocate, a drive source that drives the valve body, and a connector pipe that is connected to the discharge passage or the suction passage, and flows by bypassing the throttle valve in the engine intake system An idle air amount control device for controlling the amount, wherein the connector pipe is detachably fitted to a housing, and the housing is provided with a retaining member for restricting the connector pipe from being detached. It has a configuration.
According to this configuration, in an intake system formed by an intake pipe and a throttle valve communicating with each cylinder of a multi-cylinder engine and one surge tank (or an air cleaner, an outside air introduction duct) connected to each intake pipe, etc. The intake passage, the communication passage, and the discharge passage of the engine are introduced into the intake pipes downstream of the throttle valves by introducing air from a common surge tank upstream of the throttle valves so as to bypass the throttle valves. Connected to guide. During idling, the valve element is opened, and the air guided to the suction passage flows into the discharge passage from the communication passage and is then guided to each intake pipe.
Here, since the connector pipe is connected to the housing with respect to the suction passage or the discharge passage, molding of the housing is facilitated, and the piping layout can be freely changed by appropriately changing the orientation of the connector pipe. Increasingly, this device can be easily applied to various engine intake systems.
In particular, when connecting the connector pipe to the housing, it is possible to prevent the connector pipe from falling off simply by fixing the retaining member to the housing after fitting it detachably without performing adhesion, press fitting or screwing, etc. Removal after assembly can be easily performed, and repair of the apparatus, reuse of parts, correction work for incorrect assembly, and the like can be easily performed.

In the idle air amount control device having the above-described configuration, it is possible to employ a configuration in which the retaining member has a restricting portion that restricts the disconnection of the connector pipe, and the connector pipe has a restricted portion that is restricted by the restricting portion. it can.
According to this configuration, the retaining member and the connector pipe are provided with the restricting portion and the restricted portion, respectively, so that the retaining action can be further ensured, and after the assembly, the restricting portion and the restricted portion can be prevented. It is possible to confirm the state of regulation in between.

In the idle air amount control device having the above-described configuration, the restricting portion is defined by an inner edge portion that is formed in a plate shape having a predetermined thickness and is notched in a substantially arc shape, and the restricted portion is fitted to the inner edge portion. In order to make it possible, a configuration that is an annular groove formed on the outer periphery of the connector pipe can be adopted.
According to this configuration, after the connector pipe is detachably fitted to the housing, the retaining member is attached so that the inner edge as the restricting portion is fitted into the annular groove, and then the retaining member is fixed to the housing (for example, a screw) The connector pipe and the retaining member can be easily attached and can be securely connected so that the connector pipe does not fall off.

In the idle air amount control device having the above-described configuration, the connector pipe is formed by bending the front end side connected to the outside, the annular groove is formed in a deformed shape having a cross section other than a circle, and the inner edge portion sandwiches the annular groove. The structure currently formed can be employ | adopted.
According to this configuration, when connecting a bent or bent type connector pipe to the housing, after the connector pipe is detachably fitted to the housing, the retaining member is attached so that the inner edge is in close contact with the annular groove By simply fixing the connector pipe, it is possible to prevent the connector pipe from falling off and to orient the distal end side of the connector pipe connected to an external rubber hose or the like in a predetermined direction.

In the idle air amount control device having the above-described configuration, the connector pipe may have a configuration in which an annular seal groove is provided on the outer peripheral surface of the region fitted to the housing.
According to this configuration, when the connector pipe is detachably fitted to the housing, a seal member such as an O-ring can be interposed in the seal groove, thereby improving the sealing performance of the passage and preventing fluid leakage and the like. Can be prevented.

In the idle air amount control device having the above-described configuration, a plurality of connector pipes are arranged in parallel with the housing so as to be detachably fitted, and the retaining member includes a plurality of restrictions that simultaneously regulate the removal of the plurality of connector pipes. It is possible to adopt a configuration in which each of the plurality of connector pipes includes a regulated portion that is regulated by one of the plurality of regulating portions.
According to this configuration, after the plurality of connector pipes are detachably fitted to the housing, only by attaching one retaining member so as to regulate each regulated portion corresponding to each regulating portion, At the same time, a plurality of connector pipes can be prevented from falling off, and the number of parts can be reduced and the structure can be simplified as compared with the case where a plurality of retaining members are provided.

  According to the passage device and the idle air amount control device configured as described above, the connector pipe can be detachably assembled to the housing while achieving simplification of structure, weight reduction, cost reduction, size reduction, and the like. And a passage device that can prevent the connector pipe from falling off after assembly, can be easily assembled, the piping direction can be freely selected, various piping layouts are possible, and improvement in fitting can be achieved. An idle air amount control device can be obtained.

  FIGS. 1 to 8 show an embodiment of an idle air amount control device M provided with a passage device according to the present invention. FIG. 1 is a system diagram in which this device M is applied to an intake system of a four-cylinder engine. 2 is an external perspective view of the apparatus M, FIG. 3 is a plan view and a side view of the apparatus M, FIGS. 4 and 5 are front views of the apparatus M, FIG. 6 is a longitudinal sectional view of the apparatus M, and FIG. FIG. 8 is a front view and a cross-sectional view showing a retaining member forming a part of the apparatus M.

  As shown in FIG. 1, the intake system of the engine E includes four intake pipes 1 communicating with the respective cylinders, one surge tank (or air cleaner) 2 connecting the upstream ends of the four intake pipes 1, and a surge tank. 2, an outside air introduction duct 3 connected to the upstream side, a throttle valve 4 disposed in each intake pipe 1 so as to be freely opened and closed, a throttle shaft 5 for coaxially supporting the four throttle valves 4 to be opened and closed, and a throttle shaft 5, an actuator 6 for driving 5, a suction side connector pipe (suction passage) 40 of the idle air amount control device M and one pipe 7 for connecting the surge tank 2, and four discharge side connector pipes (discharge) of the idle air amount control device M (Passage) 50 and four pipes 8 for connecting the intake pipes 1 on the downstream side of the throttle valve 4 and the like.

  As shown in FIGS. 2 to 7, the idle air amount control device M includes a suction passage 11 that sucks air, four discharge passages 12 that discharge air, and a communication that connects the suction passage 11 and the four discharge passages 12. The housing 10 defining the passage 13 and the like, the valve body 20 provided in the housing 10 so as to reciprocate to open and close the communication passage 13, the stepping motor 30 as a drive source for driving the valve body 20, and the suction passage 11 are fitted. A suction-side connector pipe 40 (press-fit), four discharge-side connector pipes 50 that are detachably fitted to the discharge passage 12, and two retaining members 60 that restrict the removal of the discharge-side connector pipe 50 are provided. Yes.

  The housing 10 is formed of an aluminum material or a resin material. As shown in FIGS. 2 to 7, the suction passage 11, the four discharge passages 12, the communication passage 13 formed coaxially with the suction passage 11, the communication passage 13, and the like. A recess 14 formed adjacent to the same axis and having an enlarged diameter, two screw holes 15 for fastening a retaining member 60, a flange 16 having two screw holes 16a for fastening a cover 35 of a stepping motor 30 described later, and a through hole A mounting flange 17 having a hole 17a, a reinforcing rib 18 and the like are provided.

As shown in FIGS. 6 and 7, the suction passage 11 includes a fitting passage 11a for fitting (press-fitting) the suction-side connector pipe 40 and a diameter-reducing passage 11b formed with a diameter smaller than that of the fitting passage 11a. Is formed.
As shown in FIGS. 6 and 7, the four discharge passages 12 are formed so as to have the axis S <b> 1 in a direction perpendicular to the reciprocating direction (axis L direction) of the valve portion 21, and the discharge-side connector pipe 50 is attached and detached. A fitting passage 12a and an introduction passage 12b to be freely fitted are defined.
As shown in FIGS. 6 and 7, the four discharge passages 12 are symmetrical so as to sandwich the communication passage 13 from both sides, that is, the two discharge-side connector pipes 40 are on both sides of the communication passage 13. They are arranged in parallel with each other and arranged symmetrically with respect to the straight line X.

  As shown in FIGS. 6 and 7, the communication passage 13 is formed in a cylindrical shape coaxially with the diameter-reducing passage 12 b of the suction passage 12 and expanded in diameter, and has an inner circumferential surface in the direction of the axis L. It has four communication ports 13a that are formed radially so as to communicate with the respective discharge passages 12 (introduction passages 12b) in a vertical plane. The communication passage 13 guides the cylindrical valve body 20 to be slidably fitted in the direction of the axis L so as to open and close the communication port 13a formed on the inner peripheral surface thereof. .

  That is, the air sucked into the suction passage 11 is guided from the communication passage 13 through the communication port 13a to the four discharge passages 12, and the valve body 20 opens / closes or opens the communication port 13a. By adjusting, the amount of air flowing from the suction passage 11 to the discharge passage 12 is controlled.

The recess 14 is formed so as to accommodate the stepping motor 30 and to position the stepping motor 30 at a predetermined position in the direction of the axis L.
The screw hole 15 is for fastening the screw B in order to fix the retaining member 60 to the housing 10.
The flange 16 is formed so as to fix the stepping motor 30 to the housing 10 by contacting a cover 35 of the stepping motor 30 described later and fastening the screw B to the screw hole 16a.
The mounting flange 17 is used when the device M is fixed to a mounting portion (not shown) such as the intake pipe 1.
The reinforcing ribs 18 are formed so as to reduce the weight by thinning the housing 10 and to increase the mechanical strength of the housing 10, particularly the bending strength in the direction intersecting the axis L. Thereby, deformation of the communication passage 13 can be prevented, and the valve body 20 can smoothly reciprocate.

As shown in FIG. 6, the valve body 20 includes a valve portion 21 formed in a cylindrical shape, a screw portion 22 disposed inside the valve portion 21 and connected with a gap in the direction of the axis L, and the valve portion 21 and the screw. An O-ring 23 having a sealing function and a buffering function is provided between the parts 22.
And the outer peripheral surface 21a of the valve part 21 slides the inner peripheral surface of the communicating path 13, and opens and closes the communicating port 13a.
The screw portion 22 has a two-sided width portion on the outer periphery of the columnar portion that defines the female screw 22a, and the female screw 22a is a rotor described later while the rotation is restricted by a guide portion 34 of the stepping motor 30 described later. The screw 32 is screwed into the male screw 32a so as to be moved in the direction of the axis L.
Further, the O-ring 23 is fitted so as to be interposed between the valve portion 21 and the screw portion 22, and the screw portion 22 receives an impact force (or pressing force) or the like downward in FIG. 6 in the axis L direction. At this time, the O-ring 23 is elastically deformed so as to absorb the impact force (or pressing force) to prevent unnecessary impact force and the like from being transmitted to the valve portion 21.

  As shown in FIG. 6, the stepping motor 30 includes a case 31, a rotor (not shown) that is rotatably supported around the axis L in the case 31, and two stators that are stacked around the rotor in the direction of the axis L. (Not shown), a guide portion 34 that guides the screw portion 22 of the valve body 20 in the direction of the axis L, a cover 35 that is joined to the housing 10 and that defines an electrical connection connector 35a, the guide portion 34 and the valve portion 21 And a coil spring 36 fitted in a compressed state.

The rotor is integrally provided with a cylindrical magnetized portion magnetized in multiple poles on the outer peripheral surface thereof and a rotor screw portion 32 formed with a male screw 32a. The male screw 32a of the rotor screw part 32 is screwed into the female screw 22a of the valve body 20 (screw part 22). When the rotor (the magnetized portion and the rotor screw portion 32) rotates, the valve body 20 is moved in the direction of the axis L.
Each of the two stators is formed by an exciting coil, a bobbin around which the coil is wound, and a yoke including a pair of components that are joined by sandwiching the bobbin.
The guide portion 34 has a substantially frustoconical appearance, and is formed so as to slidably receive the screw portion 22 of the valve body 20 therein, thereby restricting the screw portion 22 from rotating about the axis L. However, it is guided so as to reciprocate in the direction of the axis L.
The cover 35 covers a substantially half of the case 31 and defines a connection connector 35 a for energizing the coil. The cover 35 is fastened to the flange 16 of the housing 10 with screws B.

  The coil spring 36 is assembled in a compressed state so as to abut against the root region of the guide portion 34 and the valve portion 21 to exert a predetermined urging force. The coil spring 36 prevents rattling between the valve portion 21 and the screw portion 22 and exerts an urging force so as to remove backlash between the female screw 22a of the screw portion 22 and the male screw 32a of the rotor screw portion 32. ing.

  As shown in FIG. 6, the suction-side connector pipe 40 has a cylindrical shape that extends in the direction of the axis L, and is fitted (press-fitted) into the suction passage 11 (fitting passage 11 a) of the housing 10. Although the straight pipe is shown here as the suction side connector pipe 40, an elbow pipe whose open end side is bent at approximately 90 degrees, or a pipe bent or curved at various other angles can be adopted. .

As shown in FIGS. 6 to 8, the four discharge-side connector pipes 50 are fitted to the discharge passage 12 (fitting passage 12 a) of the housing 10, and the downstream side of the fitting portion 51 ( A connecting portion 52 formed with a reduced diameter is provided on the tip side.
The fitting portion 51 is formed with an annular seal groove 51a into which an O-ring is fitted and an annular groove 51b as a restricted portion with which a retaining member 60 described later is engaged (inserted).
The annular groove 51b has a circular cross section and receives an inner edge 61 of a retaining member 60 described later in close contact with the axis S1.
The discharge-side connector pipe 50 is detachably fitted to the discharge passage 12 (fitting passage 12a) of the housing 10 with the O-ring fitted in the seal groove 51a.

  In this manner, by assembling the suction-side connector pipe 40 and the discharge-side connector pipe 50 as separate members to the housing 10, the housing 10 can be easily molded, and the suction-side connector pipe 40 and the discharge-side connector pipe By appropriately changing the direction of 50, the degree of freedom in piping layout is increased, and this device M can be easily applied to various intake systems of the engine E.

As shown in FIGS. 6 to 8, the retaining member 60 is formed in a flat plate shape with a predetermined thickness, and can be fitted into the two annular grooves 51 b of the two discharge-side connector pipes 50 arranged in parallel. A through hole 62 through which the screw B is passed is provided in the central region of the two inner edge portions 61 and the two inner edge portions 61 as restricting portions cut out in an arc shape.
The retaining member 60 has an inner edge portion (regulating portion) 61 in the annular groove 51b in a state where the discharge side connector pipe 50 is detachably fitted to the two discharge passages 12 (fitting passages 12a). After being inserted, the screw B is screwed into the screw hole 15 through the through hole 62, thereby being fastened to the housing 10.

  In this way, the discharge-side connector pipe 50 is prevented from coming off from the housing 10 simply by attaching the retaining member 60 after the discharge-side connector pipe 50 is detachably fitted to the discharge passage 12. Therefore, the assembling work becomes easy and functional reliability can be ensured. In addition, when connecting the discharge-side connector pipe 50 to the housing 10, it is detachably fitted without being bonded, press-fitted or screwed in, so that it can be easily removed after assembly, and the apparatus can be repaired. In addition, it is possible to easily perform the reuse of parts or the correction work of misassembly.

  Further, by providing the retaining member 60 and the connector pipe 50 with the inner edge portion 61 as the restricting portion and the annular groove 51b as the restricted portion, respectively, the engagement between the inner edge portion 61 and the annular groove 51b after assembly. The state (restricted state) can be confirmed by visual observation or the like, the assembly of the retaining member 60 is ensured, and a more reliable retaining function can be obtained.

  Further, after the two discharge-side connector pipes 50 are detachably fitted to the housing 10, one inner edge portion 61 becomes one annular groove 51b and the other one inner edge portion 61 becomes another one annular groove 51b. It is possible to prevent the two discharge-side connector pipes 50 from falling out at the same time by simply mounting one retaining member 60 so as to fit into the two parts, and compared with the case where two retaining members are provided. The number of points can be reduced and the structure can be simplified.

9 to 11 show another embodiment of the idle air amount control device M provided with the passage device according to the present invention, FIG. 9 is a cross-sectional view of the device M, and FIG. 10 is a retaining member. FIG. 11 is a front view and a cross-sectional view showing the relationship of the discharge-side connector pipe, and FIG. 11 is a plan view and a cross-sectional view showing the discharge-side connector pipe. In this embodiment, the discharge-side connector pipe 50 of the above-described embodiment is changed, and the same components as those of the above-described embodiment are denoted by the same reference numerals and description thereof is omitted.

In this apparatus M, a discharge-side connector pipe 50 ′ whose front end side is bent at approximately 90 degrees is connected to the housing 10.
That is, the four discharge-side connector pipes 50 ′ are more fitted than the fitting portion 51 and the fitting portion 51 fitted in the discharge passage 12 (fitting passage 12 a) of the housing 10 as shown in FIGS. 9 to 11. A connecting portion 52 ′ having a diameter reduced on the downstream side (tip side) and bent in the direction of the axis S 1 ′ of about 90 degrees with respect to the axis S 1 of the fitting portion 51 is provided.

As described above, the fitting portion 51 is formed with an annular seal groove 51a into which an O-ring is fitted, and an annular groove 51b ′ as a regulated portion that engages (fits) the inner edge portion 61 of the retaining member 60. Yes.
The annular groove 51b ′ is formed to have an irregular shape having a cross section other than a circle, that is, to form a regular octagonal cross section as shown in FIGS. 10 (a) and 11 (c).
The inner edge 61 of the retaining member 60 is closely fitted to the annular groove 51b ′ in the direction of the axis S1 and closely fitted to the regular octagonal two-sided width portion.

According to this embodiment, when connecting the bent discharge-side connector pipe 50 ′ to the housing 10, the discharge-side connector pipe 50 ′ is oriented in advance so that the connecting portion 52 ′ faces a predetermined direction. (Removal passage 12) is detachably fitted, and then a retaining member 60 is mounted so that the inner edge 61 is in close contact with the annular groove 51b ', and then the screw B is passed through the through-hole 62 and the screw hole 15 Fasten to and fix.
As a result, the discharge-side connector pipe 50 'can be connected to the housing 10 so as not to fall off, and the connecting portion 52' connected to an external rubber hose or the like can be fixed in a state oriented in a predetermined direction.
Here, since the annular groove 52b ′ is formed to have a polygonal cross section, the annular groove 52b ′ can be oriented so that the inner edge portion 61 is in close contact with the two-surface width portion, depending on the piping layout of the engine E. The direction of the connecting portion 52b ′ can be changed as appropriate.

In the above-described embodiment, the case where only the discharge-side connector pipes 50 and 50 ′ are detachably connected to the housing 10 has been shown. However, the present invention is not limited to this, and the suction-side connector pipe can be detachably attached. The retaining member may be applied to the suction side connector pipe.
In the above-described embodiment, in the idle air amount control device M having the four discharge passages 12 so as to correspond to the four-cylinder engine E, the retaining member 60 does not fall out of the two discharge-side connector pipes 50 and 50 ′ at the same time. However, the present invention is not limited to this. In an engine such as a 6-cylinder engine or an 8-cylinder engine, three or more discharge-side connector pipes are configured to be controlled simultaneously. Alternatively, one discharge-side connector pipe may be regulated.
In the above embodiment, a regular octagon is shown as the deformed cross section of the annular groove 51b ′, but the present invention is not limited to this, and is a regular polygon that defines a two-sided width portion or a relationship with the inner edge portion 61. Other cross-sectional shapes can be applied as long as the shape can regulate the rotation.
In the said embodiment, although the case where the channel | path apparatus was applied to the idle air quantity control apparatus which lets air pass was shown, it is not limited to this, As long as it has the housing and connector pipe which define a channel | path The present invention may be applied to a passage structure that requires a fluid control device for passing other fluids or other piping elements.

  As described above, the passage device and the idle air amount control device according to the present invention detachably attach the connector pipe to the housing while achieving simplification, weight reduction, cost reduction, size reduction, and the like. In addition, the connector pipe can be prevented from falling off after assembly, the assembly work is easy, the piping direction can be freely selected, various piping layouts are possible, and improvement in fitting is achieved. Therefore, it can be applied to a passage device mounted on a two-wheeled vehicle, an automobile, etc., particularly an idle air amount control device, and it is necessary to connect a connector pipe to a housing to define a passage through which a fluid passes. For example, it is useful in other fields.

1 is a system diagram showing an embodiment in which an idle air amount control device including a passage device according to the present invention is applied to a four-cylinder engine. It is an external appearance perspective view which shows one Embodiment of the idle air quantity control apparatus provided with the channel | path apparatus which concerns on this invention. FIG. 3 shows the idle air amount control device shown in FIG. 2, (a) is a plan view of the device, and (b) is a side view of the device. FIG. 3 is a front view of the idle air amount control device shown in FIG. 2. FIG. 3 is a front view showing a state where a discharge side connector pipe and a retaining member are removed in the idle air amount control device shown in FIG. 2. It is a longitudinal cross-sectional view of the idle air amount control apparatus shown in FIG. It is a cross-sectional view of the idle air amount control device shown in FIG. FIG. 3 shows a retaining member and a discharge-side connector pipe incorporated in the idle air amount control device shown in FIG. 2, wherein (a) is a front view thereof and (b) is a transverse sectional view thereof. It is a cross-sectional view which shows other embodiment of the idle air quantity control apparatus provided with the channel | path apparatus which concerns on this invention. FIG. 10 shows a retaining member and a discharge-side connector pipe incorporated in the idle air amount control device shown in FIG. 9, wherein (a) is a front view thereof and (b) is a transverse sectional view thereof. FIG. 10 shows a discharge-side connector pipe incorporated in the idle air amount control device shown in FIG. 9, wherein (a) is a plan view thereof, (b) is a cross-sectional view thereof, and (c) is an E in (a). It is sectional drawing in -E.

Explanation of symbols

E Engine 1 Intake pipe (intake system)
2 Surge tank 4 Throttle valve 10 Housing 11 Suction passage 11a Fitting passage 11b Reduced diameter passage 12 Discharge passage 12a Fitting passage 12b Introduction passage 13 Communication passage 13a Communication port 14 Recess 15 Screw hole 16 Flange 17 Mounting flange 18 Reinforcement rib 20 Valve Body 21 Valve portion 22 Screw portion 23 O-ring 30 Stepping motor (drive source)
31 Case 32 Rotor screw part 32a Male thread 34 Guide part 35 Cover 35a Connection connector 36 Coil spring 40 Suction side connector pipes 50, 50 'Discharge side connector pipes 51, 51 Fitting part 51a Seal grooves 51b, 51b' Annular grooves (covered) Regulatory Department)
52, 52 'connection part 60 retaining member 61 inner edge part (regulation part)
62 Through hole

Claims (12)

A passage device comprising a housing defining a passage, and a connector pipe defining the passage and connected to the housing, wherein the passage device defines a passage for fluid as a whole,
The connector pipe is detachably fitted to the housing,
The housing is provided with a retaining member that regulates the disconnection of the connector pipe.
A passage device characterized by that. The retaining member has a restricting portion that restricts the connector pipe from being detached,
The connector pipe has a regulated portion that is regulated by the regulating portion.
A passage device characterized by that. The regulating portion is defined by an inner edge portion that is formed in a plate shape with a predetermined thickness and is cut out in a substantially arc shape,
The regulated portion is an annular groove formed on the outer periphery of the connector pipe so as to fit the inner edge portion.
The passage device according to claim 2. The connector pipe is formed by bending the tip side connected to the outside,
The annular groove is formed in an irregular shape having a cross section other than a circle,
The inner edge is formed so as to sandwich the annular groove.
The passage device according to claim 3. The connector pipe has an annular seal groove on the outer peripheral surface of the region fitted in the housing.
The passage device according to any one of claims 1 to 4, wherein the passage device is provided. The connector pipe is detachably fitted to the housing in a plurality of parallel arrangements,
The retaining member has a plurality of restricting portions that simultaneously restrict the disconnection of the plurality of connector pipes,
The plurality of connector pipes each have a regulated portion that is regulated by one of the plurality of regulating portions.
6. A passage device according to any one of 1 to 5, wherein A housing that defines a suction passage for sucking air, a plurality of discharge passages for discharging air, a communication passage that connects the suction passage and the plurality of discharge passages, and reciprocating to the housing to open and close the communication passage And a connector pipe connected to the discharge passage or the suction passage, and controls the amount of air flowing by bypassing the throttle valve in the intake system of the engine. An idle air amount control device,
The connector pipe is detachably fitted to the housing,
The housing is provided with a retaining member that regulates the disconnection of the connector pipe.
An idle air amount control device characterized by that. The retaining member has a restricting portion that restricts the connector pipe from being detached,
The connector pipe has a regulated portion that is regulated by the regulating portion.
The idle air amount control device according to claim 7. The regulating portion is defined by an inner edge portion that is formed in a plate shape with a predetermined thickness and is cut out in a substantially arc shape,
The regulated portion is an annular groove formed on the outer periphery of the connector pipe so as to fit the inner edge portion.
The idle air amount control device according to claim 8. The connector pipe is formed by bending the tip side connected to the outside,
The annular groove is formed in an irregular shape having a cross section other than a circle,
The inner edge is formed so as to sandwich the annular groove.
The idle air amount control device according to claim 9. The connector pipe has an annular seal groove on the outer peripheral surface of the region fitted in the housing.
The idle air amount control device according to any one of claims 7 to 10, wherein The connector pipe is detachably fitted to the housing in a plurality of parallel arrangements,
The retaining member has a plurality of restricting portions that simultaneously restrict the disconnection of the plurality of connector pipes,
The plurality of connector pipes each have a regulated portion that is regulated by one of the plurality of regulating portions.
The idle air amount control device according to any one of 7 to 11, characterized in that.

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