JP2022154386A - Intake control device - Google Patents

Abstract

To provide an intake control device which is high in a degree of freedom of the attachment of a cable, and low in a price.SOLUTION: An intake control device 1 comprises a body 2 for supporting a valve shaft 6 to which a valve body 5 in a first intake passage 4 is fixed, a lever part 7 fixed to the valve shaft 6, and turned by a cable 12, and an inlet pipe 3 having a downstream-side second intake passage 10, and the body 2 and an inlet pipe 3 are connected to each other by making a first flange part 8 of the first intake passage 4 and a second flange part 11 of the second intake passage 10 oppose each other. A tip part of an outer cable 12 is fixed to the inlet pipe 3. A regulation part 19 for regulating a mutual displacement of the body 2 and the inlet pipe 3 is arranged at a downstream-side face of a portion in which a stopper part 9 of the first flange part 8 is arranged.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake control device that constitutes a part of an intake pipe extending into a combustion chamber of an internal combustion engine.

2. Description of the Related Art Conventionally, there is known an intake control device that constitutes a part of an intake pipe extending into a combustion chamber of an internal combustion engine. This intake control device includes a body having therein a first intake passage that constitutes a part of an intake pipe, a valve body that adjusts the amount of intake air inside the first intake passage, and a valve body that is fixed and supported by the body. and a lever portion that is fixed to the portion of the valve shaft protruding outside and rotates the valve shaft (see, for example, Patent Document 1).

The intake control device of Patent Document 1 employs a Bowden cable as a cable for transmitting the operating force of the accelerator grip to the lever portion. The tip of the inner cable of the Bowden cable is fixed to the lever and directly transmits the operating force to the lever. The tip of the outer cable of the Bowden cable is attached to a cable stay fixed to the body of the intake control device.

JP 2010-223049 A

Today, the above configuration is one of the most popular configurations of an intake control device for a two-wheeled vehicle. However, in the market, the routing of the operating force transmission cable is diversifying for each vehicle model, and the shape of the cable stay is becoming more complicated. Therefore, there is a demand for a new cable mounting structure that can achieve an inexpensive intake control device with a high degree of freedom in layout.

SUMMARY OF THE INVENTION An object of the present invention is to provide a low-cost intake control device with a high degree of freedom in cable attachment.

An intake control device of the present invention is an intake control device that constitutes a part of an intake pipe continuing into a combustion chamber of an internal combustion engine,
A body internally provided with a first intake passage that constitutes a part of the intake pipe, and a body that is rotatably supported inside the first intake passage to adjust the amount of intake air flowing through the first intake passage. a valve body, a valve shaft to which the valve body is fixed and rotatably supported by the body and protruding outside the first intake passage of the body; and a portion of the valve shaft which protrudes to the outside. and a lever portion that receives an operating force for rotating the valve shaft,
the body includes a first flange portion projecting in a crossing direction substantially perpendicular to the extending direction of the first intake passage;
A stopper portion for restricting rotation of the lever portion is provided on the upstream side of the first intake passage of the first flange portion,
the body is connected to an inlet pipe internally provided with a second intake passage that constitutes a part of the intake pipe and is located downstream of the first intake passage;
the inlet pipe includes a second flange portion projecting in a direction substantially orthogonal to the second intake passage,
In an intake control device in which the body and the inlet pipe are connected with the downstream side of the first flange portion and the upstream side of the second flange portion facing each other,
The lever part receives the operation force by a pulling force in the rotating direction of the cable,
The cable is an inner cable of a Bowden cable,
A tip portion of an outer cable of the Bowden cable is fixed to the inlet pipe,
The downstream surface of the portion of the first flange portion where the stopper portion is provided is provided with a restricting portion that restricts mutual displacement in the intersecting direction between the body and the inlet pipe. do.

In this configuration, the position where the cable (inner cable) is arranged is determined by the mounting position of the Bowden cable. It is not preferable because there is a risk that it will run over the outer circumference. Therefore, when fixing the outer cable to the inlet pipe, it is necessary to prevent the position of the inlet pipe and the intake control device from being shifted.

Therefore, in the present invention, a restricting portion that restricts mutual displacement in the cross direction between the body and the inlet pipe is provided on the downstream side of the portion of the first flange projecting from the body where the stopper portion is provided. there is As a result, since the restricting portion is arranged at a position with a large radial distance from the central axis of the intake passage, misalignment between the body and the inlet pipe is appropriately restricted by cooperating with the other restricting portions. and the positioning accuracy between them can be maintained satisfactorily. Therefore, the outer cable of the Bowden cable can be fixed to the inlet pipe without causing problems such as positional deviation during operation of the cable.

Furthermore, the portion of the first flange portion where the stopper portion is provided is the portion where the stopper was conventionally provided, and the surface on the downstream side of that portion is a surface that has not been used conventionally. Therefore, providing the restricting portion on that surface does not increase the size of the body or increase the cost. Therefore, according to the present invention, it is possible to provide an inexpensive intake control device with a high degree of freedom in attaching cables.

In the present invention, at a portion corresponding to the restricting portion on the upstream surface of the second flange portion, a restricting member is fitted to the restricting portion to restrict mutual displacement of the body and the inlet pipe in the intersecting direction. A fitting may be provided.

According to this, by fitting the restricting fitting portion of the second flange portion to the restricting portion of the first flange portion, the effect of restricting the mutual displacement between the body and the inlet pipe can be reliably exhibited. can.

1 is a perspective view showing an intake control device according to an embodiment of the present invention with a body on the upstream side and an inlet pipe on the downstream side separated; FIG. FIG. 2 is a perspective view showing a portion of the intake control device of FIG. 1 where a stopper portion on the upstream side of the first flange portion is provided; FIG. 2 is a diagram showing a first flange portion of the intake control device of FIG. 1 viewed from the downstream side along the central axis of the first intake passage; FIG. 3 is a perspective view showing a second flange portion of the intake control device of FIG. 1 as seen from the upstream side;

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an intake control device according to one embodiment of the present invention. This intake control device 1 constitutes a part of an intake pipe continuing into a combustion chamber of an internal combustion engine. In FIG. 1, the body 2 on the upstream side and the inlet pipe 3 on the downstream side of the intake control device 1 are shown in a separated state.

As shown in FIG. 1, an intake control device 1 includes a body 2 internally provided with a first intake passage 4 forming a part of an intake pipe, and rotatably supported inside the first intake passage 4. a valve body 5 for adjusting the amount of intake air flowing into the first intake passage 4; It comprises a shaft 6 and a lever portion 7 fixed to a portion protruding outside of the valve shaft 6 and receiving an operating force for rotating the valve shaft 6 .

The body 2 includes a first flange portion 8 projecting in a crossing direction substantially perpendicular to the extending direction of the first intake passage 4 . A stopper portion 9 (see FIG. 2) for restricting the rotation of the lever portion 7 is provided integrally with the first flange portion 8 on the upstream side of the first flange portion 8 . The body 2 is connected to an inlet pipe 3 internally provided with a second intake passage 10 (see FIG. 4) that forms part of the intake pipe and is located downstream of the first intake passage 4 .

The inlet pipe 3 has a second flange portion 11 projecting in a direction substantially orthogonal to the second intake passage 10 . The body 2 and the inlet pipe 3 are connected with the downstream side of the first flange portion 8 and the upstream side of the second flange portion 11 facing each other.

The lever portion 7 receives the operating force for rotating the valve shaft 6 by the pulling force of the cable 12 in the rotating direction. This cable 12 is composed of an inner cable of a Bowden cable. An outer cable of the Bowden cable is fixed to the inlet pipe 3 via a stay 13 . In this embodiment, two cables 12 are used as the cables 12 , one for opening the valve body 5 and the other for closing the valve body 5 .

The lever portion 7 is provided with a valve-opening locking hole 14 to which the valve-opening cable 12 is fixed and a valve-closing locking hole 15 to which the valve-closing cable 12 is fixed. A guide groove 16 for guiding each cable 12 along the outer peripheral portion is provided on the outer peripheral portion of the lever portion 7 . The stay 13 is provided with two end fixing portions 17 to which an end portion of the outer cable of the valve-opening cable 12 and an outer cable end portion of the valve-closing cable 12 are respectively fixed.

FIG. 2 shows a portion where the stopper portion 9 on the upstream side of the first flange portion 8 is provided. As shown in FIG. 2, the stopper portion 9 defines the fully open position of the valve body 5 by coming into contact with the contact portion 18 of the lever portion 7 when the valve body 5 is rotated in the opening direction. .

FIG. 3 shows a state of the portion of the first flange portion 8 viewed from the downstream side. As shown in FIG. 3, on the downstream side surface of the portion of the first flange portion 8 where the stopper portion 9 is provided, there is a crossing direction between the body 2 and the inlet pipe 3 (the extension of the first intake passage 4). A regulating portion 19 is provided for regulating mutual displacement in a direction substantially orthogonal to the direction.

The portion of the first flange portion 8 where the stopper portion 9 is provided is the peripheral edge portion of the first flange portion 8 away from the first intake passage 4, and the restricting portion 19 is provided on the downstream side surface of this portion. is advantageous in that it can sufficiently exhibit the function of restricting the displacement in the cross direction.

At a portion of the first flange portion 8 opposite to the restricting portion 19 with respect to the downstream opening of the first intake passage 4 , a portion of the first flange portion 8 cooperates with the restricting portion 19 to extend the cross direction between the body 2 and the inlet pipe 3 . Auxiliary restricting portion 20 is provided to restrict the displacement. From the viewpoint of effectively restricting this displacement, the auxiliary restricting portion 20 is positioned on the mating surface of the first flange portion 8 with the second flange portion 11 and at a position as far away from the restricting portion 19 as possible. be provided. The restricting portion 19 and the auxiliary restricting portion 20 are formed as convex portions that protrude downstream.

FIG. 4 shows how the second flange portion 11 is viewed from the upstream side. As shown in FIG. 4 , the restriction portion 19 and the auxiliary restriction portion 20 are fitted to the portions corresponding to the restriction portion 19 and the auxiliary restriction portion 20 on the upstream surface of the second flange portion 11 , so that the body 2 and the inlet are connected to each other. A restricting fitting portion 21 and an auxiliary restricting fitting portion 22 are provided for restricting mutual displacement with respect to the pipe 3 in the crossing direction.

As shown in FIGS. 1 and 3, the downstream surface of the first flange portion 8 and the upstream surface of the second flange portion 11 can be closely connected by interposing a gasket 23 therebetween. configured as A bolt hole 24 for inserting a fastening bolt for fastening the body 2 and the inlet pipe 3 to each other is provided on the outer side of the first flange portion 8 in the vicinity of each of the restricting portion 19 and the auxiliary restricting portion 20 .

As shown in FIG. 4 , female threaded holes 25 corresponding to the respective bolt holes 24 are provided on the outside of the second flange portion 11 near the restricting fitting portion 21 and the auxiliary restricting fitting portion 22 .

Since the first intake passage 4 has a simple cylindrical shape, the body 2 can be easily formed by die casting. For this reason, it is easy to form a convex portion such as the restricting portion 19 integrally with the body 2 by die casting with high accuracy.

On the other hand, since the inlet pipe 3 has a curved second intake passage 10 and is likely to be undercut, the inlet pipe 3 is often formed by sand casting. For this reason, it is difficult to provide a convex portion like the restricting portion 19 on the inlet pipe 3 with high accuracy. However, it is not easy to form recesses or holes such as the restricting fitting portion 21 with high accuracy by cutting the mating surface of the second flange portion 11 formed by sand casting with the first flange portion 8 . be.

Therefore, as in the present embodiment, the restricting portion 19 and the auxiliary restricting portion 20 are formed as convex portions projecting from the mating surface of the first flange portion 8 with the second flange portion 11, and the restricting fitting portion 21 and the auxiliary restricting portion 21 are formed. By forming the restricting fitting portion 22 as a hole that fits these elements, these elements can be formed with high precision in accordance with the difference in the molding methods of the two.

In this configuration, when connecting the body 2 and the inlet pipe 3, first, the downstream surface of the first flange portion 8 of the body 2 and the upstream surface of the second flange portion 11 of the inlet pipe 3 are connected. facing each other. At this time, a gasket 23 is interposed between these surfaces, and the restriction portion 19 and the auxiliary restriction portion 20 of the first flange portion 8 are connected to the restriction fitting portion 21 and the auxiliary restriction fitting portion 22 of the second flange portion 11. Mate.

Next, a fastening bolt is inserted into each bolt hole 24 and screwed into each female screw hole 25 to connect the body 2 and the inlet pipe 3 . As a result, the first intake passage 4 of the body 2 and the second intake passage 10 of the inlet pipe 3 are connected.

At this time, the tip portions of the valve-opening cable 12 and the valve-closing cable 12 pass through the guide groove 16 on the outer periphery of the lever portion 7 and enter the valve-opening locking hole 14 and the valve-closing locking hole of the lever portion 7 . 15, respectively. Also, the ends of the outer cables of the cables 12 are fixed to the respective end fixing portions 17 of the stay 13 so that the cables 12 are substantially parallel. The other end of each cable 12 is connected to an accelerator grip of a vehicle in which the intake control device 1 is mounted so that an operating force can be transmitted to the lever portion 7 by the accelerator grip.

The body 2 and the inlet pipe 3 are thus connected, and when the driver of the vehicle having the connected intake control device 1 in which the cable 12 is arranged rotates the accelerator grip in one direction, the cable 12 for opening the valve is opened. The pulling force is transmitted to the lever portion 7 via the guide groove 16 and the valve-opening lock hole 14, and the valve body 5 is rotated in the valve-opening direction.

On the other hand, when the driver rotates the accelerator grip in the other direction, the cable 12 for valve closing is pulled, and this pulling force is transmitted to the lever portion 7 via the guide groove 16 and the locking hole 15 for closing the valve. The body 5 is rotated in the valve closing direction. In this manner, the driver can operate the accelerator to rotate the valve body 5 in the valve opening direction or the valve closing direction when driving the vehicle.

While such accelerator operation is repeated, the body 2 is controlled by the restricting portion 19 away from the central axis of the first intake passage 4 and the auxiliary restricting portion 20 positioned substantially on the opposite side with the first intake passage 4 interposed therebetween. Positional deviation in the rotational direction and the translational direction within a plane perpendicular to the central axis line between the inlet pipe 3 is effectively regulated. As a result, the cables 12 do not run over or deviate from the guide grooves 16 of the lever portion 7 on both sides of the guide grooves 16, and the accelerator operation can be properly performed.

As described above, according to the present embodiment, the surface of the first flange portion 8 on the downstream side of the stopper 9 which is away from the central axis of the first intake passage 4 is provided between the body 2 and the inlet pipe 3 . Since the regulating portion 19 for regulating mutual displacement in the intersecting direction is provided, the displacement between the body 2 and the inlet pipe 3 can be appropriately regulated, and the positioning accuracy between them can be maintained satisfactorily.

Therefore, even if the end of the outer cable of the Bowden cable that constitutes the cable 12 for transmitting the operating force due to the accelerator operation to the lever portion 7 is fixed to the inlet pipe 3 away from the lever portion 7, each cable 12 is It is possible to operate the accelerator without riding on or deviating from the periphery of the vehicle. This increases the degree of freedom in attaching the cable 12 .

In addition, the portion where the restricting portion 19 is provided is the downstream side surface of the upstream portion of the first flange portion 8 where the stopper portion 9 is conventionally provided, and is the portion which was not used and was vacant in the past. be. Therefore, the restricting portion 19 can be provided without increasing the size of the body 2 or increasing the cost.

In addition, a restricting fitting portion 21 that is fitted to the restricting portion 19 to restrict mutual displacement between the body 2 and the inlet pipe 3 is provided at a location corresponding to the restricting portion 19 on the upstream surface of the second flange portion 11 . Therefore, the effect of restricting the mutual displacement between the body 2 and the inlet pipe 3 by the restricting portion 19 can be reliably exhibited.

Further, the restricting portion 19 and the auxiliary restricting portion 20 of the body 2 are formed as convex portions projecting from the mating surface of the first flange portion 8 with the second flange portion 11, and the restricting fitting portion 21 and the auxiliary restricting portion 21 of the inlet pipe 3 are formed. Since the restricting fitting portion 22 is formed as a hole to be fitted therein, these elements can be formed with high accuracy according to the difference in the molding method of the body 2 and the inlet pipe 3, and their functions can be effectively exhibited. be able to.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto. For example, the number of cables 12 that apply the operating force to the lever portion 7 may be one. In this case, the single cable 12 may be used to apply an operating force in the valve opening direction to the lever portion 7, and the operating force in the valve closing direction may be applied by a spring.

DESCRIPTION OF SYMBOLS 1... Intake control apparatus 2... Body 3... Inlet pipe 4... First intake passage 5... Valve body 6... Valve shaft 7... Lever part 8... First flange part 9... Stopper part 10 2nd intake passage 11 2nd flange 12 cable 13 stay 14 locking hole for valve opening 15 locking hole for valve closing 16 guide groove 17 end fixing portion , 18... abutting portion 19... restricting portion 20... auxiliary restricting portion 21... restricting fitting portion 22... auxiliary restricting fitting portion 23... gasket 24... bolt hole 25... female screw hole.

Claims (2)

An intake control device that constitutes a part of an intake pipe continuing into a combustion chamber of an internal combustion engine,
A body internally provided with a first intake passage that constitutes a part of the intake pipe, and a body that is rotatably supported inside the first intake passage to adjust the amount of intake air flowing through the first intake passage. a valve body, a valve shaft to which the valve body is fixed and rotatably supported by the body and protruding outside the first intake passage of the body; and a portion of the valve shaft which protrudes to the outside. and a lever portion that receives an operation force for rotating the valve shaft,
the body includes a first flange portion projecting in a crossing direction substantially perpendicular to the extending direction of the first intake passage;
A stopper portion for restricting rotation of the lever portion is provided on the upstream side of the first intake passage of the first flange portion,
the body is connected to an inlet pipe internally provided with a second intake passage that constitutes a part of the intake pipe and is located downstream of the first intake passage;
the inlet pipe includes a second flange portion projecting in a direction substantially perpendicular to the second intake passage,
In an intake control device in which the body and the inlet pipe are connected with the downstream side of the first flange portion and the upstream side of the second flange portion facing each other,
The lever part receives the operation force by a pulling force in the rotating direction of the cable,
The cable is an inner cable of a Bowden cable,
An outer cable of the Bowden cable is fixed to the inlet pipe,
The downstream surface of the portion of the first flange portion where the stopper portion is provided is provided with a restricting portion that restricts mutual displacement in the intersecting direction between the body and the inlet pipe. intake control device. At a location corresponding to the restricting portion on the upstream surface of the second flange portion, there is a restricting fitting portion that is fitted to the restricting portion to restrict mutual displacement of the body and the inlet pipe in the crossing direction. 2. An intake control device according to claim 1, wherein:

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