JP2006037914A - Bypass air control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control the quantity of bypass air flowing through the respective bypass air outflow holes uniform with high accuracy in a control device for controlling the openings of a plurality of air outflow holes using a single bypass valve. <P>SOLUTION: A bypass air inflow hole 3 is opened in the bottom 2a of a sliding valve guide cylinder 2, first bypass air outflow holes 5 and second bypass air outflow holes 6 are opened with a hole pitch P in the side wall, and further a slit groove 4 is recessed from one end 2c to the bottom 2a. The bypass valve 11 is formed by integrally connecting the first valve part 11a and the second valve 11b by a small-diameter connecting part 11c. A first bypass air chamber 12 is formed by the bottom 2a of the sliding valve guide cylinder 2 and the end face 11a2 of the first valve part 11a, the first bypass air of the first bypass air chamber 12 is controlled by the openings of the first bypass air outflow holes 5 controlled by the first valve part 11a, and the second bypass air in the second bypass air chamber 13 formed by the opposite end faces 11a1, 11b1 of the first valve part 11a and the second valve part 11b is controlled by the opening of the second bypass air outflow hole 6 controlled by the second valve part 11b. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an intake control device that controls the amount of air supplied to an engine, and in particular, bypasses a throttle valve disposed in an intake passage that passes through a throttle body, and an intake passage upstream of the throttle valve. The present invention relates to a bypass air control device that controls the amount of bypass air from the throttle valve toward the intake passage downstream of the throttle valve.

A plurality of bypass air outflow holes directed to a plurality of intake passages downstream from the throttle valve are respectively opened in a single valve body storage chamber, and the openings of the plurality of bypass air outflow holes into the valve body storage chamber are respectively Japanese Patent Application Laid-Open No. 2002-89415 discloses a bypass air control device that is controlled to have the same opening degree by a single bypass valve that is movably disposed in a body storage chamber.
Referring to FIG. 5 of the publication, the valve body storage chamber 32 is formed as a single unit, the inlet 31 of the bypass passage is opened below, and the first upstream side is formed laterally. The branch passage 36 and the second upstream branch passage 37 are opened.
A first downstream branch passage 63 is formed from the end of the first upstream branch passage 36 to the intake passage downstream of the first throttle valve of the first intake passage. A second downstream branch passage 65 is formed from the end to the intake passage downstream of the second throttle valve of the second intake passage.
Further, a single bypass valve 33 is movably disposed in the valve body storage chamber 32, and the opening of the first and second upstream branch passages 36, 37 into the valve body storage chamber 32 is a single bypass. The valve 33 is controlled to the same opening degree.
Accordingly, by operating the single bypass valve 33, the first and second upstream branch passages 36 and 37 are controlled to have the same opening degree, whereby the first and second throttles of the first and second intake passages are controlled. The same amount of bypass air is supplied toward each intake passage downstream of the valve.
JP 2002-89415 A

According to such a conventional bypass air control device, the single bypass valve 33 is used to control the amount of bypass air directed to the first and second upstream branch passages 36 and 37 in the same way. The opening positions and the opening shapes of the first and second upstream branch passages 36 and 37 into the valve body storage chamber 32 need to be the same.
Here, paying attention to the first and second upstream branch passages 36 and 37, both the passages 36 and 37 are controlled to have the same opening by using a single bypass valve 33, and therefore, the first and second upstream branch passages 36. , 37 need to be formed concentrically facing the inside of the valve body storage chamber 32.
The passages of both passages 36 and 37 are processed using a single drill from the first upstream branch passage 36 on one side toward the inside of the valve body storage chamber 32, and further inside the valve body storage chamber 32. Generally, it is drilled toward the second upstream branch passage 37 on the other side.
However, according to the above processing method, it is difficult to accurately process the first upstream branch passage 36 and the second upstream branch passage 37 into a concentric shape and a hole shape. It is difficult to control both passages 36 and 37 to the same opening using 33.
This is due to the following reason.
First, since the first upstream branch passage 36 and the second upstream branch passage 37 are processed by a single drill, the overall length of the drill becomes long, and the cutting edge portion at the tip of the drill is likely to be shaken. is there.
Secondly, after drilling the first upstream branch passage 36 having a large cutting resistance, the drill largely enters the valve body storage chamber 32 having no cutting resistance. Thus, the cutting resistance increases. When a large entry is made from a part to a part without resistance, the tip of the drill tends to shake.
Thirdly, the drill again processes the second upstream branch passage 37 having a large resistance from the valve body storage chamber 32 having no cutting resistance. At this time, the inner peripheral portion of the valve body storage chamber 32 Since the tip of the drill has a circular shape and the tip of the tip of the drill is in the valve body storage chamber 32 and is in a free state, when the tip of the drill tip bites into the inner peripheral portion of the valve body storage chamber 32, it swings greatly. It will be.
That is, the tip of the drill tip cannot be disposed at a fixed position with respect to the circular portion of the inner peripheral portion of the valve body storage chamber 32.

  The present invention has been made in view of the above problems, and in the case of controlling the openings of a plurality of bypass air outflow holes using a single bypass valve, the amount of bypass air flowing through each bypass air outflow hole is uniform with high accuracy. It is an object of the present invention to provide a bypass air control device that can be controlled.

In order to achieve the above object, the bypass air control device according to the present invention includes a bypass air inflow hole continuous to the atmosphere side and a plurality of bypass airs connected to a plurality of intake passages downstream from the throttle valve in the sliding valve guide cylinder. In the bypass air control device in which the outflow hole is opened and the bypass air outflow hole is controlled to be opened and closed by a bypass valve disposed in the sliding valve guide cylinder,
A bypass air inflow hole connected to the bypass air inflow passage is opened at the bottom of the slide valve guide cylinder formed along the longitudinal direction XX, and the side wall of the slide valve guide cylinder slides. A first bypass air outflow hole connected to the first bypass air outflow path and a second bypass air outflow hole connected to the second bypass air outflow path are opened with a hole pitch P along the longitudinal direction XX of the valve guide tube. And a slit groove is recessed from one end of the sliding valve guide tube toward the bottom,
On the other hand, the bypass valve that is operated to move in the longitudinal direction XX by the driving member is movably disposed in the sliding valve guide tube and controls the opening of the first bypass air outflow hole; A second valve part for controlling the opening of the second bypass air outflow hole and a small diameter connecting part for connecting the opposing surfaces of the first valve part and the second valve part are integrally formed along the longitudinal direction and slide A first bypass air chamber is formed by the bottom of the valve guide tube and the end face of the first valve facing the valve guide tube,
The first bypass air supplied to the first bypass air chamber via the bypass air inflow hole is supplied to the first bypass air outflow passage through the control opening of the first bypass air outflow hole controlled by the first valve portion. ,
On the other hand, a second bypass air chamber is formed by the opposing end surfaces of the first valve portion and the second valve portion and the small diameter connecting portion,
The second bypass air is supplied to the second bypass air chamber from the first bypass air chamber via the slit groove, and the second bypass air has a control opening of the second bypass air outflow hole controlled by the second valve portion. The first feature is that it is supplied to the outflow passage.

Further, according to the present invention, in the sliding valve guide cylinder, a bypass air inflow hole connected to the atmosphere side and a plurality of bypass air outflow holes connected to a plurality of intake passages downstream from the throttle valve are opened. In the bypass air control device in which the outflow hole is controlled to be opened and closed by a bypass valve disposed in the sliding valve guide cylinder,
A bypass air inflow hole connected to the bypass air inflow passage is opened at the bottom of the slide valve guide cylinder formed along the longitudinal direction XX, and the side wall of the slide valve guide cylinder slides. A first bypass air outflow hole connected to the first bypass air outflow path and a second bypass air outflow hole connected to the second bypass air outflow path are opened with a hole pitch P along the longitudinal direction XX of the valve guide tube. Drilled,
On the other hand, the bypass valve that is moved and operated in the longitudinal direction XX by the drive member M is movably disposed in the sliding valve guide cylinder and controls the opening of the first bypass air outflow hole. A second valve portion that controls the opening of the second bypass air outflow hole, and a small-diameter connecting portion that connects the opposed surfaces of the first valve portion and the second valve portion are integrally formed along the longitudinal direction; A through hole is formed in the first valve portion from the end surface toward the opposite end surface, and a first bypass air chamber is formed by the bottom portion of the sliding valve guide tube and the end surface of the first valve facing the first portion.
The first bypass air supplied to the first bypass air chamber via the bypass air inflow hole is supplied to the first bypass air outflow passage through the control opening of the first bypass air outflow hole controlled by the first valve portion. ,
On the other hand, a second bypass air chamber is formed by the opposing end surfaces of the first valve portion and the second valve portion and the small diameter connecting portion,
The second bypass air is supplied to the second bypass air chamber from the first bypass air chamber through the through hole, and the second bypass air has a control opening of the second bypass air outflow hole controlled by the second valve portion. The second feature is that it is supplied to the outflow passage.

Further, according to the present invention, in the sliding valve guide cylinder, a bypass air inflow hole connected to the atmosphere side and a plurality of bypass air outflow holes connected to a plurality of intake passages downstream from the throttle valve are opened. In the bypass air control device in which the outflow hole is controlled to be opened and closed by a bypass valve disposed in the sliding valve guide cylinder,
The side wall of the sliding valve guide tube formed along the longitudinal direction XX has a first bypass air outflow hole continuous with the first bypass air outflow passage along the longitudinal direction XX of the sliding valve guide tube. A second bypass air outflow hole connected to the second bypass air outflow passage is opened with a hole pitch P, and a slit groove is recessed from one end of the sliding valve guide tube toward the bottom, and In the slit groove, a bypass air inflow hole connected to the bypass air inflow passage is opened and drilled,
On the other hand, the bypass valve that is operated to move in the longitudinal direction XX by the driving member is movably disposed in the sliding valve guide tube and controls the opening of the first bypass air outflow hole; A second valve portion that controls the opening of the second bypass air outflow hole and a small-diameter connecting portion that connects the first valve portion and the opposing surface of the second valve portion are integrally formed along the longitudinal direction, and are further slid. An adjustment screw is screwed to the bottom of the valve guide tube so as to face the end face of the first valve portion,
A first bypass air chamber is formed by the bottom portion of the sliding valve guide tube and the end face of the first valve facing it.
The first bypass air outflow passage is provided with a control opening of the first bypass air outflow hole that is controlled by the first valve portion, with the first bypass air supplied to the first bypass air chamber from the bypass air inflow hole through the slit groove. To supply
On the other hand, a second bypass air chamber is formed by the opposing end surfaces of the first valve portion and the second valve portion and the small diameter connecting portion,
The second bypass air supplied to the second bypass air chamber via the slit groove is supplied to the second bypass air outflow passage through the control opening of the second bypass air outflow hole controlled by the second valve portion. Is the third feature.

Further, according to the present invention, a bypass air inflow hole connected to the atmosphere side and a plurality of bypass air outflow holes connected to a plurality of intake passages downstream from the throttle valve are opened in the slide valve guide cylinder, and the bypass air outflow In the bypass air control device in which the hole is controlled to be opened and closed by a bypass valve disposed in the sliding valve guide cylinder,
A bypass air inflow hole connected to the bypass air inflow passage is opened at the bottom of the control member insertion hole formed along the longitudinal direction XX, and the control member insertion hole is formed on the side wall of the control member insertion hole. A first bypass air outflow passage and a second bypass air outflow passage are opened and drilled along the longitudinal direction XX of
On the other hand, the control hole member inserted and disposed in the control member insertion hole is an annular member having a sliding valve guide tube drilled in the longitudinal direction XX,
A first bypass air outflow hole facing the first bypass air outflow path and a second bypass air outflow hole facing the second bypass air outflow path are formed in one side wall of the longitudinal direction XX of the slide valve guide tube. A slit groove is drilled in the other side wall with a pitch P, and
Further, the bypass valve that is moved and operated in the longitudinal direction XX by the drive member is movably disposed in the slide valve guide cylinder of the control hole member and controls the opening of the first bypass air outflow hole. A valve portion, a second valve portion that controls the opening of the second bypass air outflow hole, and a small-diameter connecting portion that connects opposite surfaces of the first valve portion and the second valve portion are integrally formed along the longitudinal direction. And
A first bypass air chamber is formed by the bottom portion of the control member insertion hole and the end face of the first valve facing the control member insertion hole,
The first bypass air supplied to the first bypass air chamber via the bypass air inflow hole is supplied to the first bypass air outflow passage through the control opening of the first bypass air outflow hole controlled by the first valve portion. ,
On the other hand, a second bypass air chamber is formed by the opposing end surfaces of the first valve portion and the second valve portion and the small diameter connecting portion,
The second bypass air is supplied to the second bypass air chamber from the first bypass air chamber via the slit groove, and the second bypass air has a control opening of the second bypass air outflow hole controlled by the second valve portion. The fourth feature is that the gas is supplied to the outflow passage.

Furthermore, in the present invention, a bypass air inflow hole connected to the atmosphere side and a plurality of bypass air outflow holes connected to a plurality of intake passages downstream from the throttle valve are opened in the slide valve guide cylinder, and the bypass In the bypass air control device in which the air outflow hole is controlled to be opened and closed by a bypass valve disposed in the sliding valve guide cylinder,
A bypass air inflow hole is opened in the other side wall of the control member insertion hole formed along the longitudinal direction XX, and the longitudinal direction X of the control member insertion hole is formed in one side wall of the control member insertion hole. A first bypass air outflow passage and a second bypass air outflow passage are opened along the -X,
On the other hand, the control hole member inserted and disposed in the control member insertion hole is an annular member having a sliding valve guide tube drilled in the longitudinal direction XX,
A first bypass air outflow hole facing the first bypass air outflow path and a second bypass air outflow hole facing the second bypass air outflow path are formed in one side wall of the longitudinal direction XX of the slide valve guide tube. A slit groove is drilled in the other side wall with a pitch P, and
Further, the bypass valve that is moved and operated in the longitudinal direction XX by the drive member is movably disposed in the slide valve guide cylinder of the control hole member and controls the opening of the first bypass air outflow hole. A valve portion, a second valve portion that controls the opening of the second bypass air outflow hole, and a small-diameter connecting portion that connects opposite surfaces of the first valve portion and the second valve portion are integrally formed along the longitudinal direction. Furthermore, an adjustment screw that faces the end face of the first valve portion is screwed to the bottom of the control member insertion hole,
A first bypass air chamber is formed by the bottom portion of the sliding valve guide tube of the control hole member and the end surface of the first valve portion facing it,
The first bypass air outflow passage is provided with a control opening of the first bypass air outflow hole controlled by the first valve portion, with the first bypass air supplied to the first bypass air chamber through the bypass air inflow hole and the slit groove. To supply
On the other hand, a second bypass air chamber is formed by the opposing end surfaces of the first valve portion and the second valve portion and the small diameter connecting portion,
The second bypass air outflow passage is provided with a control opening of the second bypass air outflow hole that is controlled by the second valve portion. The second bypass air is supplied to the second bypass air chamber through the bypass air inflow hole and the slit groove. The fifth feature is that the power is supplied to.

According to the first aspect of the present invention, the opening of the first bypass air outflow hole opening in the control valve guide cylinder is controlled by the first valve portion, and the opening of the second bypass air outflow hole is controlled by the second valve portion. The
Therefore, the bypass air supplied from the bypass air inflow hole to the first bypass air chamber is not supplied to the first bypass air outflow path from the opening of the first bypass air outflow hole controlled by the first valve portion. Controlled and supplied.
On the other hand, the bypass air supplied from the first bypass air chamber to the second bypass air chamber through the slit groove passes from the opening of the second bypass air outflow hole controlled by the second valve portion to the second bypass air outflow passage. The bypass air is controlled and supplied.
Here, the first bypass air outflow hole and the second bypass air outflow hole are formed with a hole pitch P apart from each other, and a relatively short drill is used toward the inside of the sliding valve guide cylinder. Since it is sufficient to perform a single drill penetration process, there is little fluctuation of the drill tip, and the hole shapes of the first and second bypass air outflow holes opened in the sliding valve guide cylinder can be formed uniformly with high accuracy.
The first bypass air outflow hole and the second bypass air outflow hole are formed with a hole pitch P, and this processing is performed by, for example, a feeding device of an NC milling machine.
And since the feeding accuracy in the feeding device is maintained with extremely high accuracy, the hole pitch can be formed with high accuracy.
On the other hand, since the bypass valve is formed as a single valve by integrally forming the first valve portion and the second valve portion, the bypass valve can be formed with high accuracy.
According to the above, the hole shape and hole pitch (corresponding to the opening position) of the first bypass air outflow hole and the second bypass air outflow hole opening in the sliding valve guide cylinder can be formed with high accuracy and the first valve portion. Since the single bypass valve formed by the first valve portion and the second valve portion can be formed with high precision, the opening of the first bypass air outflow hole and the second bypass air outflow hole are identical with high precision by the single bypass valve. The opening degree (the same opening) can be controlled, so that uniform bypass air according to the control position of the bypass valve can be supplied from both bypass air outflow holes toward the bypass air outflow passage connected thereto.

Further, according to the second feature of the present invention, the supply of the bypass air to the second bypass air chamber is different compared to the first feature.
That is, the bypass air supplied from the bypass air inflow hole to the first bypass air chamber is supplied to the second bypass air chamber through the through hole formed in the first valve portion.
Here, the inner diameter of the sliding valve guide cylinder is formed with high precision by machining since the valve portion of the bypass valve is slidably arranged with a very small gap. Since the slit groove as in the first feature is eliminated, the inner diameter of the sliding valve guide tube can be processed and formed with high accuracy and the deburring operation can be eliminated.
That is, the blade does not bite into the slit groove when the sliding valve guide tube is processed, and a uniform resistance to the blade can be maintained.
Moreover, the generation of burrs is eliminated.

Further, according to the third feature of the present invention, compared to the first feature, the bypass air inflow passage is opened in the slit groove, and enters the first bypass air chamber at the bottom of the sliding valve guide tube, An adjustment screw facing the end face of the first valve portion is screwed and arranged.
According to this, the opening of the first bypass air outflow hole and the second bypass air outflow hole can be controlled simultaneously by screwing the adjusting screw, and the idling air amount of the engine can be accurately adjusted and controlled.
In addition, since the adjustment screw is arranged facing the end face of the first valve portion, the adjustment screw is arranged along the longitudinal direction of the bypass valve. When the adjustment screw comes into contact with the first valve portion, The force in the oblique direction does not act on the valve, the sliding resistance between the bypass valve and the sliding valve guide cylinder does not increase, and the dynamic characteristics and wear resistance of the bypass valve can be maintained well.

Further, according to the fourth feature of the present invention, as compared with the first feature, the first bypass air outflow hole, the second bypass air outflow hole and the slit groove are formed in the control member insertion hole. A control hole member made of a member is arranged.
According to this, the bypass air supplied from the bypass air inflow hole to the first bypass air chamber passes from the opening of the first bypass air outflow hole of the control hole member controlled by the first valve portion to the first bypass air outflow path. Supplied towards.
On the other hand, the bypass air supplied from the first bypass air chamber to the second bypass air chamber via the slit groove of the control hole member is the opening of the second bypass air outflow hole of the control hole member controlled by the second valve portion. To the second bypass air outflow path.
Here, according to the fourth feature, since the first bypass air outflow hole and the second bypass air outflow hole are formed in the control hole member, the hole depth penetrates the thick part of the control hole member. This length can be very small, and according to this, the deflection of the drill tip during drilling of the air outflow hole is suppressed, and the hole accuracy can be greatly improved.
Moreover, the deburring which occurs at the time of processing the air outflow hole into the slide valve guide cylinder can be performed very easily.
In addition, when trouble occurs in the processing of the air outflow hole, it is only necessary to discard the control hole member, so that the cost of failure can be reduced.
Furthermore, when reducing the sliding resistance of the bypass valve and the control hole member or reducing the sliding wear, the material of the control hole member only and the selection of the plating treatment can be selected, improving the dynamic characteristics of the bypass valve, Improved wear resistance can be easily achieved.

Furthermore, according to the fifth feature of the present invention, compared to the fourth feature, an adjustment screw facing the end face of the first valve portion is disposed at the bottom of the control member insertion hole, and the slit groove of the control hole member is arranged. The bypass air inflow hole is arranged in an open position.
According to this, the bypass air supplied from the bypass air inflow hole to the first bypass air chamber through the slit groove of the control hole member is the first bypass air outflow hole of the control hole member controlled by the first valve portion. It supplies toward the 1st bypass air outflow path from opening.
On the other hand, the bypass air supplied to the second bypass air chamber via the slit groove is directed from the opening of the second bypass air outflow hole of the control hole member controlled by the second valve portion toward the second bypass air outflow path. Supplied.
According to the above, in addition to the effect in the fourth feature, the opening of the first bypass air outflow hole and the second bypass air outflow hole can be controlled simultaneously by screwing the adjusting screw. The amount of air can be adjusted and controlled accurately.
In addition, since the adjustment screw is arranged facing the end face of the first valve portion, the adjustment screw is arranged along the longitudinal direction of the bypass valve. When the adjustment screw comes into contact with the first valve portion, The force in the oblique direction does not act on the valve, the sliding resistance between the bypass valve and the sliding valve guide cylinder does not increase, and the dynamic characteristics and wear resistance of the bypass valve can be maintained well.

Hereinafter, a first embodiment of a bypass air control device of the present invention will be described with reference to FIG.
Reference numeral 1 denotes a housing, which is formed integrally or separately from a throttle body described later.
The casing 1 is provided with a sliding valve guide tube 2 having a circular cross section along the longitudinal direction XX from the right to the left in the figure, and the right side is an enlarged drive. A body insertion hole 1a is opened toward the right end, and a bottom 2a is formed on the left side.
A bypass air inflow hole 3 connected to the bypass air inflow passage 3a is opened at the bottom 2a of the sliding valve guide tube 2.
The upstream side of the bypass air inflow passage 3a is communicated with the atmosphere such as an air cleaner (not shown).
A slit groove 4 is formed in the other side wall 2b of the sliding valve guide tube 2 along the longitudinal direction XX from the one end 2c toward the bottom 2a.
Further, a first bypass air outflow hole 5 and a second bypass air outflow hole 6 are formed in the side wall 2d of the sliding valve guide tube 2 so as to open.
The first bypass air outflow hole 5 and the second bypass air outflow hole 6 are arranged with a hole pitch P along the longitudinal direction XX.
The first bypass air outflow hole 5 is communicated with a first bypass air outflow passage 8 connected to an intake passage 7b downstream of the first throttle valve 7a of the first throttle body 7.
Further, the second bypass air outflow hole 6 communicates with the second bypass air outflow passage 10 connected to the intake passage 9b downstream of the second throttle valve 9a of the second throttle body 9.

Reference numeral 11 denotes a bypass valve that is movably disposed in the sliding valve guide cylinder 2, and includes a first valve portion 11 a that faces the first bypass air outflow hole 5 and a second valve portion that faces the second bypass air outflow hole 6. 11b and a small-diameter connecting portion 11c that connects the opposing end surface 11a1 of the first bypass valve 11a and the opposing end surface 11b1 of the second bypass valve 11b are integrally formed along the longitudinal direction XX.
Note that M is a drive body that moves the bypass valve 11 along the longitudinal direction XX in accordance with an electrical signal from the ECU, and for example, a step motor, a linear solenoid, or the like is used.
In this example, the drive body M is a step motor, and the output shaft Ma in which the male screw of the step motor M is formed is inserted into and fixed to the drive body insertion hole 1a of the housing 1, and is screwed onto the female screw 11d of the bypass valve 11. Worn. Further, the bypass valve 11 is allowed in the longitudinal direction XX by the flange portion 11e extending outward, and is prevented from rotating.

The bypass valve is movably disposed in the sliding valve guide cylinder 2 in the longitudinal direction XX. According to this, the end face 11a2 of the first valve portion 11a and the sliding valve guide cylinder 2 A first bypass air chamber 12 is formed by the bottom portion 2 a, and the bypass air inflow hole 3 and the slit groove 4 are opened in the first bypass air chamber 12.
Further, a second bypass air chamber 13 is formed by the opposed end surface 11a1 of the first valve portion 11a, the opposed end surface 11b1 of the second valve portion 11b, and the small diameter connecting portion 11c, and a slit is formed in the second bypass air chamber 13. The groove 4 is opened.

Next, the operation will be described.
The figure shows a state in which the bypass valve 11 closes the first bypass air outflow hole 5 and the second bypass air outflow hole 6. In this state, the driving body M rotates in accordance with an electrical signal from the ECU, and this rotation angle. Accordingly, the bypass valve 11 including the first valve portion 11a and the second valve portion 11b moves left and right along the longitudinal direction XX in the sliding valve guide tube 2.
And when the 1st valve part 11a opens the 1st bypass air outflow hole 5, the air supplied in the 1st bypass air chamber 12 via the bypass air inflow passage 3a and the bypass air inflow hole 3 is The opening of the first valve portion 11a is controlled and supplied to the first bypass air outflow passage 8 from the first bypass air outflow hole 5, and the bypass air enters the intake passage 7b downstream of the first throttle valve 7a. Supplied towards
On the other hand, when the second valve portion 11b opens the second bypass air outflow hole 6 in synchronization with the first valve portion 11a, the second bypass air chamber 13 is interposed via the first bypass air chamber 12 and the slit groove 4. The opening of the air supplied to the inside is controlled by the second valve portion 11b, and is supplied from the second bypass air outflow hole 6 into the second bypass air outflow passage 10, and the bypass air is supplied to the second throttle valve 9a. It is supplied toward the intake passage 9b on the further downstream side.

Here, the first bypass air outflow hole 5 and the second bypass air outflow hole 6 are arranged with a hole pitch P along the longitudinal direction XX of the slide valve guide cylinder 2, and further inside the slide valve guide cylinder 2. Since the bypass valve 11 formed integrally with the first valve portion 11a, the second valve portion 11b, and the small-diameter connecting portion 11c is disposed in the first bypass air outlet 8 and the second bypass The same amount of bypass air can be accurately distributed and supplied toward the air outflow passage 10.
That is, when paying attention to the first and second bypass air outflow holes 5 and 6, since the passage length can be formed relatively short and only the middle portion of the housing 1 has to be machined, The first and second bypass air outflow holes 5 opening into the sliding valve guide cylinder 2 can be uniformly formed in the same shape.
Further, the hole pitch P of the first and second bypass air outflow holes 5 and 6 can be formed with extremely high accuracy using an NC milling machine feeding device, for example, based on the position of the first bypass air outflow hole 5. .
On the other hand, when focusing on the bypass valve 11, the distance L between the end surface 11a2 of the first valve portion 11a of the bypass valve 11 and the opposing end surface 11b1 of the second valve portion 11b is formed with high accuracy using, for example, a feeding device of an NC lathe. it can.

  According to the above, the first and second bypass air outflow holes 5 and 6 opened in the sliding valve guide cylinder 2 can be formed in the same shape, and the first bypass air outflow hole 5 and the first valve portion are formed. Since the distance L1 between the end surface 11a2 of 11a and the distance L2 between the second bypass air outflow hole 6 and the opposite end surface 11b1 of the second valve portion 11b can be formed to be the same, a single bypass valve 11 is used. An amount of bypass air can be supplied to the first and second air outflow passages 8 and 10 via the first and second air outflow holes 5 and 6.

Next, a second embodiment of the present invention will be described with reference to FIG.
In addition, about the same structure part as FIG. 1, the same code | symbol is used and description is abbreviate | omitted.
A sliding valve guide tube 2 is formed along the longitudinal direction XX from the right to the left of the housing 1.
At this time, as shown in FIG. 1, no slit groove is formed on the other side wall 2 b of the sliding valve guide tube 2.
Further, a through hole 11f is formed by penetrating from the end surface 11a2 of the first valve portion 11b of the bypass valve 11 toward the opposing end surface 11a1.
And when the drive body M drives and the bypass valve 11 is operated and the 1st valve part 11a opens the 1st bypass air outflow hole 5, via the bypass air inflow path 3a and the bypass air inflow hole 3, The opening of the air supplied into the first bypass air chamber 12 is controlled by the first valve portion 11 a and is supplied from the first bypass air outflow hole 5 into the first bypass air outflow path 8. Is supplied toward the intake passage 7b on the downstream side of the first throttle valve 7a.
On the other hand, when the second valve portion 11b opens the second bypass air outflow hole 6 in synchronization with the first valve portion 11a, the second bypass air chamber 13 is provided via the first bypass air chamber 12 and the through hole 11f. The opening of the air supplied to the inside is controlled by the second valve portion 11b, and is supplied from the second bypass air outflow hole 6 into the second bypass air outflow passage 10, and the bypass air is supplied to the second throttle valve 9a. It is supplied toward the intake passage 9b on the further downstream side.

According to the second embodiment, since the first bypass air chamber 12 and the second bypass air chamber 13 are communicated with each other through the through hole 11f of the first valve 11a, the longitudinal direction XX of the sliding valve guide tube 2 is established. Can be eliminated.
According to the above, when the inner peripheral portion of the sliding valve guide cylinder 2 is processed, the sliding valve guide cylinder 2 having a circular cross section is processed, so that no burrs are generated, and the sliding valve guide cylinder 2 is accurately rounded. The bypass valve 11 can be slidably supported on the sliding valve guide cylinder 2 with a very small gap.
The sliding valve guide cylinder 2 is cast using a core when the casing 1 is injection-molded using a mold, but the core does not require a protrusion corresponding to a slit groove. The core can have a simple shape.

Next, a third embodiment of the present invention will be described with reference to FIG.
In addition, the same structure part as FIG. 1 uses the same code | symbol, and abbreviate | omits description.
A slit groove 4 is formed in one side wall 2d of the sliding valve guide tube 2 from the one end 2c toward the bottom 2a.
The slit groove 4 is formed with a bypass air inflow hole 3 connected to the bypass air inflow passage 3a.
The other side wall 2b of the sliding valve guide tube 2 has a first bypass outlet hole 5 connected to the first bypass outlet path 8 and a second bypass outlet hole 6 connected to the second bypass outlet path 10 as in FIG. Open with a pitch P.
Further, an adjustment screw 15 is screwed to the bottom portion 2a of the sliding valve guide tube 2. The tip of the adjustment screw 15 enters the first bypass air chamber 12 and the first valve portion 11a of the bypass valve 11. Facing the end face 11a2.

According to the third embodiment, when the driving body M is driven to operate the bypass valve 11 and the first valve portion 11a opens the first bypass air outflow hole 5, the bypass air inflow passage 3a, bypass The opening of the air supplied into the first bypass air chamber 12 via the air inlet hole 3 and the slit groove 4 is controlled by the first valve portion 11 a, and the first bypass air is discharged from the first bypass air outlet hole 5. The air is supplied into the outflow passage 8 and the bypass air is supplied toward the intake passage 7b on the downstream side of the first throttle valve 7a.
On the other hand, when the second valve portion 11b opens the second bypass air outflow hole 6 in synchronization with the first valve portion 11a, the second bypass air chamber 13 has an inside through the bypass air inflow hole 3 and the slit groove 4. The opening of the air supplied to the air is controlled by the second valve portion 11b, and is supplied from the second bypass air outflow hole 6 into the second bypass air outflow passage 10. The bypass air is supplied from the second throttle valve 9a. It is supplied toward the intake passage 9b on the downstream side.

The bypass valve 11 can be moved and adjusted along the longitudinal direction XX by screwing the adjustment screw 15 while the tip of the adjustment screw 15 is brought into contact with the end surface 11a2 of the first valve portion 11a. The opening of the first bypass air outflow hole 5 by the first valve portion 11 and the opening of the second bypass air outflow hole 6 by the second valve portion 11b can be controlled, and the intake passage on the downstream side of the first throttle valve 7a The amount of idling air supplied to 7b can be finely adjusted accurately and at the same time, the amount of idling air supplied to the intake passage 9b downstream of the second throttle valve 9a can be finely adjusted accurately.
Further, as shown in the figure, the axis of the adjusting screw 15 is arranged substantially the same as the axis of the bypass valve 11 and is disposed in contact with the end surface 11a2 of the first valve portion 11a. A force is not applied, and thereby, a smooth dynamic characteristic of the bypass valve 11 can be obtained.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
In addition, about the same structure part as FIG. 1, the description is abbreviate | omitted using the same code | symbol.
A control member insertion hole 20 is drilled from the bottom of the driver insertion hole 1a of the housing 1 toward the left, and a bypass air inflow hole 3 connected to the bypass air inflow passage 3a is opened at the bottom 20a. Is done.
The first bypass air outflow passage 8 and the second bypass air outflow passage 10 are opened in the side wall 20b of the control member insertion hole 20 along the longitudinal direction XX of the control member insertion hole 20. The
Reference numeral 21 denotes a control hole member that is inserted into the control member insertion hole 20 (inserted in a light press-fitted state), and a sliding valve guide cylinder 21a penetrates along the longitudinal direction XX inside thereof. It consists of an annular member perforated.
The first bypass air outflow hole 5 facing the first bypass air outflow path 8 and the second bypass air outflow hole 6 facing the second bypass air outflow path 10 are formed on one side wall 21b of the control hole member 21 with a hole pitch. Drilled with P.
A slit groove 24 along the longitudinal direction XX is formed in the other side wall 21c of the control hole member 21.
The slit groove 4 reaches the left end of the control hole member 21 or near the left end.
The control hole member is inserted into the control member insertion hole 20, and in this inserted state, the first bypass air outflow hole 5 is communicated with the first bypass air outflow path 8, and the second bypass air outflow hole 6 is It communicates with the second bypass air outflow passage 10.
The bypass valve 11 in which the first valve portion 11a, the second valve portion 11b, and the small diameter connecting portion 11c are integrally formed is movably disposed in the slide valve guide tube 21a of the control hole member 21.
According to the above, the first bypass air chamber 12 is formed by the bottom portion 20a of the control member insertion hole 20 and the end surface 11a2 of the first valve portion 11a, and the bypass air inflow hole 3 opens in the first bypass air chamber 12.
Further, the second bypass air chamber 13 is formed by the opposed end surface 11a1 of the first valve portion 11a, the opposed end surface 11b1 of the second valve portion 11b, and the small diameter connecting portion 11c.

According to the fourth embodiment, when the driving body M is driven to operate the bypass valve 11 and the first valve portion 11a opens the first bypass air outflow hole 5 of the control hole member 21, the bypass air is The opening of the air supplied into the first bypass air chamber 12 through the inflow passage 3 a and the bypass air inflow hole 3 is controlled by the first valve portion 11 a, and the casing 1 is connected to the first bypass air outflow hole 5. The first bypass air outflow passage 8 is supplied, and this bypass air is supplied toward the intake passage 7b on the downstream side of the first throttle valve 7a.
On the other hand, when the second valve portion 11b opens the second bypass air outflow hole 6 of the control hole member 21 in synchronization with the first valve portion 11a, the slit groove of the control hole member 21 from the first bypass air chamber 12 is obtained. The air supplied to the second bypass air chamber 13 via 4 is controlled in its opening by the second valve portion 11 b and supplied to the second bypass air outflow passage 10 from the second bypass air outflow hole 6. The bypass air is supplied toward the intake passage 9b on the downstream side of the second throttle valve 9a.

As described above, according to the fourth embodiment, the control hole member 21 is provided with the sliding valve guide tube 21a, the first bypass air outflow hole 5, the second bypass air outflow hole 6, and the slit groove 4 and bypasses. By arranging the valve 11 in the sliding valve guide cylinder 21a, the following special effects can be achieved.
That is, the hole shape and hole pitch P of the first and second bypass air outflow holes 5 and 6 can be formed with extremely high accuracy.
This is because the first and second bypass air outflow holes 5 and 6 are formed in the thin wall portion (for example, 3 millimeters) of the one side wall 21b of the control hole member 21, so that the processing depth by the drill can be greatly reduced. This is because the vibration of the drill tip can be suppressed.
Further, after the first bypass air outflow hole 5 is drilled, for example, the second bypass air outflow hole 6 can be fed by a feeding device of an NC milling machine.
On the other hand, when the first and second bypass air outflow holes 5 and 6 are drilled, a machining burr is generated in the sliding valve guide cylinder 21a, but the sliding valve guide cylinder 21a is formed in the through hole. Therefore, the burr can be easily removed.
Further, since the control hole member 21 is prepared separately from the housing 1, the degree of freedom in selecting the material of the control hole member 21 is high, and the wear resistance and slidability with the bypass valve 11 can be set optimally. (Generally, the housing 1 is formed of an aluminum alloy or a zinc die-cast alloy.)
In addition, if a defect occurs during the processing of the control hole member 21, it is only necessary to discard only the control hole member, so that the cost of waste can be reduced compared to discarding the entire housing 1.
Furthermore, since the first and second bypass air outflow passages 8 and 10 need only be connected to the first and second bypass air outflow holes 5 and 6, there is no need to increase the passage machining accuracy.

Next, a fifth embodiment of the present invention will be described with reference to FIG.
In addition, about the same structure part as FIG. 4, the description is abbreviate | omitted using the same code | symbol.
The bypass air inflow hole 3 is opened in the other side wall 20 c of the control member insertion hole 20, and the slit groove 4 is formed in the other side wall 21 c of the control hole member 21 inserted and arranged in the control member insertion hole 20. The opening is arranged facing.
The bypass air inflow passage 3 a is connected to the bypass air inflow hole 3.
An adjustment screw 15 is screwed to the bottom portion 20a of the control member insertion hole 20. The tip of the adjustment member 15 is arranged to face the end surface 11a2 of the first valve portion 11a through the first bypass air chamber 12. .

According to the fifth embodiment, when the driving body M is driven to operate the bypass valve 11 and the first valve portion 11a opens the first bypass air outflow hole 5 of the control hole member 21, the bypass air is The opening of the air supplied into the first bypass air chamber 12 via the inflow passage 3a, the bypass air inflow hole 3 and the slit groove 4 is controlled by the first valve portion 11a, and the first bypass air outflow hole 5 is controlled. Then, the air is supplied into the first bypass air outflow passage 8 of the housing 1, and this bypass air is supplied toward the intake passage 7 b on the downstream side of the first throttle valve 7 a.
On the other hand, when the second valve part 11b opens the second bypass air outflow hole 6 of the control hole member 21 in synchronization with the first valve part 11a, the second valve part 11b is connected to the second through the bypass air inflow hole 3 and the slit groove 4. The opening of the air supplied into the bypass air chamber 13 is controlled by the second valve portion 11b, and the air is supplied from the second bypass air outflow hole 6 into the second bypass air outflow passage 10. 2 is supplied toward the intake passage 9b downstream of the throttle valve 9a.

The bypass valve 11 can be moved and adjusted along the longitudinal direction XX by screwing the adjustment screw 15 while the tip of the adjustment screw 15 is brought into contact with the end surface 11a2 of the first valve portion 11a. The opening of the first bypass air outflow hole 5 can be controlled by the 1 valve portion 11 and the opening of the second bypass air outflow hole 6 by the second valve portion 11b can be controlled. The amount of idling air supplied to 7b can be finely adjusted accurately and at the same time, the amount of idling air supplied to the intake passage 9b downstream of the second throttle valve 9a can be finely adjusted accurately.
Further, as shown in the figure, the axis of the adjusting screw 15 is disposed substantially the same as the axis of the bypass valve 11 and is disposed in contact with the end surface 11a2 of the first valve portion 11a, so that the bypass valve 11 is inclined. Thus, the smooth dynamic characteristics of the bypass valve 11 in the sliding valve guide cylinder 21a can be obtained.
Further, it is not necessary to form the slit groove 4 in the housing 1.

The principal part longitudinal cross-sectional view which shows 1st Example of the bypass air control apparatus of this invention. The principal part longitudinal cross-sectional view which shows the 2nd Example of this invention. The principal part longitudinal cross-sectional view which shows the 3rd Example of this invention. The principal part longitudinal cross-sectional view which shows the 4th Example of this invention. The principal part longitudinal cross-sectional view which shows the 5th Example of this invention.

Explanation of symbols

2 Sliding valve guide cylinder 2a Bottom part 3 Bypass air inflow hole 3a Bypass air inflow path 4 Slit groove 5 First bypass air outflow hole 6 Second bypass air outflow hole 11 Bypass valve 11a First valve part 11b Second valve part 11c Small diameter Connecting portion 12 First bypass air chamber 13 Second bypass air chamber

Claims (5)

In the sliding valve guide cylinder, a bypass air inflow hole connected to the atmosphere side and a plurality of bypass air outflow holes connected to a plurality of intake passages downstream from the throttle valve are opened, and the bypass air outflow hole is a sliding valve. In a bypass air control device that is controlled to open and close by a bypass valve disposed in the guide tube,
A bypass air inflow hole 3 connected to the bypass air inflow passage 3a is opened at the bottom 2a of the slide valve guide cylinder 2 formed along the longitudinal direction XX. 2d includes a first bypass air outlet hole 5 connected to the first bypass air outlet path 8 and a second bypass air connected to the second bypass air outlet path 10 along the longitudinal direction XX of the sliding valve guide tube 2. The outflow hole 6 is opened with a hole pitch P and the slit groove 4 is recessed from one end 2c of the sliding valve guide tube 2 toward the bottom 2a.
On the other hand, the bypass valve 11 that is moved in the longitudinal direction XX by the drive member M is movably disposed in the sliding valve guide tube 2 and controls the opening of the first bypass air outflow hole 5. A valve portion 11a, a second valve portion 11b that controls the opening of the second bypass air outflow hole 6, and a small-diameter connecting portion 11c that connects the first valve portion 11a and the opposing surfaces 11a1 and 11b1 of the second valve portion 11b. A first bypass air chamber 12 is formed by the bottom portion 2a of the sliding valve guide tube 2 and the end surface 11a2 of the first valve 11a opposite to the bottom portion 2a of the sliding valve guide tube 2, which are integrally formed along the longitudinal direction.
The first bypass air supplied to the first bypass air chamber 12 through the bypass air inflow hole 3 flows out of the first bypass air through the control opening of the first bypass air outflow hole 5 controlled by the first valve portion 11a. Supply to road 8,
On the other hand, the second bypass air chamber 13 is formed by the opposed end surfaces 11a1, 11b1 and the small diameter connecting portion 11c of the first valve portion 11a and the second valve portion 11b.
The second bypass air supplied from the first bypass air chamber 12 through the slit groove 4 to the second bypass air chamber has a control opening of the second bypass air outflow hole 6 controlled by the second valve portion 11b. A bypass air control device, wherein the bypass air control device is supplied to the second bypass air outflow passage 10. In the sliding valve guide cylinder, a bypass air inflow hole connected to the atmosphere side and a plurality of bypass air outflow holes connected to a plurality of intake passages downstream from the throttle valve are opened, and the bypass air outflow hole is a sliding valve. In a bypass air control device that is controlled to open and close by a bypass valve disposed in the guide tube,
A bypass air inflow hole 3 connected to the bypass air inflow passage 3a is opened at the bottom 2a of the slide valve guide cylinder 2 formed along the longitudinal direction XX. 2d includes a first bypass air outlet hole 5 connected to the first bypass air outlet path 8 and a second bypass air connected to the second bypass air outlet path 10 along the longitudinal direction XX of the sliding valve guide tube 2. The outflow hole 6 is opened with a hole pitch P, and is drilled.
On the other hand, the bypass valve 11 that is moved in the longitudinal direction XX by the drive member M is movably disposed in the sliding valve guide tube 2 and controls the opening of the first bypass air outflow hole 5. A valve portion 11a, a second valve portion 11b that controls the opening of the second bypass air outflow hole 6, and a small-diameter connecting portion 11c that connects the first valve portion 11a and the opposing surfaces 11a1 and 11b1 of the second valve portion 11b. The first valve portion 11a is integrally formed along the longitudinal direction, and a through hole 11f is formed in the first valve portion 11a from the end surface 11a2 to the opposing end surface 11a1, and the bottom portion 2a of the sliding valve guide tube 2 is opposed to the bottom portion 2a. The first bypass air chamber 12 is formed by the end surface 11a2 of the 1 valve 11a,
The first bypass air supplied to the first bypass air chamber 12 through the bypass air inflow hole 3 flows out of the first bypass air through the control opening of the first bypass air outflow hole 5 controlled by the first valve portion 11a. Supply to road 8,
On the other hand, the second bypass air chamber 13 is formed by the opposed end surfaces 11a1, 11b1 and the small diameter connecting portion 11c of the first valve portion 11a and the second valve portion 11b.
The second bypass air supplied from the first bypass air chamber 12 through the through hole 11f to the second bypass air chamber has a control opening of the second bypass air outflow hole 6 controlled by the second valve portion 11b. A bypass air control device, wherein the bypass air control device is supplied to the second bypass air outflow passage 10. In the sliding valve guide cylinder, a bypass air inflow hole connected to the atmosphere side and a plurality of bypass air outflow holes connected to a plurality of intake passages downstream from the throttle valve are opened, and the bypass air outflow hole is a sliding valve. In a bypass air control device that is controlled to open and close by a bypass valve disposed in the guide tube,
On the side wall of the sliding valve guide tube 2 formed along the longitudinal direction XX, the first bypass air connected to the first bypass air outflow passage 8 along the longitudinal direction XX of the sliding valve guide tube 2 is formed. An outflow hole 5 and a second bypass air outflow hole 6 connected to the second bypass air outflow path 10 are opened with a hole pitch P and from one end 2c of the sliding valve guide tube 2 toward the bottom 2a. The slit groove 4 is recessed, and the slit air groove is further provided with a bypass air inflow hole 3 connected to the bypass air inflow passage 3a.
On the other hand, the bypass valve 11 that is moved in the longitudinal direction XX by the drive member M is movably disposed in the sliding valve guide tube 2 and controls the opening of the first bypass air outflow hole 5. A valve portion 11a, a second valve portion 11b that controls the opening of the second bypass air outflow hole 6, and a small-diameter connecting portion 11c that connects the first valve portion 11a and the opposing surfaces 11a1 and 11b1 of the second valve portion 11b. An adjustment screw 15 is screwed and arranged on the bottom 2a of the sliding valve guide tube 2 so as to face the end surface 11a2 of the first valve portion 11a.
A first bypass air chamber 12 is formed by the bottom portion 2a of the sliding valve guide tube 2 and the end surface 11a2 of the first valve 11a opposite thereto,
The first bypass air supplied to the first bypass air chamber 12 from the bypass air inflow hole 3 through the slit groove 4 has a control opening of the first bypass air outflow hole 5 controlled by the first valve portion 11a. 1 supply to the bypass air outflow path 8,
On the other hand, the second bypass air chamber 13 is formed by the opposed end surfaces 11a1, 11b1 and the small diameter connecting portion 11c of the first valve portion 11a and the second valve portion 11b.
The second bypass air outflow passage 10 is supplied to the second bypass air chamber through the slit groove 4 through the control opening of the second bypass air outflow hole 6 controlled by the second valve portion 11b. A bypass air control device characterized by being supplied to In the sliding valve guide cylinder, a bypass air inflow hole connected to the atmosphere side and a plurality of bypass air outflow holes connected to a plurality of intake passages downstream from the throttle valve are opened, and the bypass air outflow hole is a sliding valve. In a bypass air control device that is controlled to open and close by a bypass valve disposed in the guide tube,
A bypass air inflow hole 3 connected to the bypass air inflow passage 3a is opened at the bottom 20a of the control member insertion hole 20 formed along the longitudinal direction XX. The first bypass air outflow path 8 and the second bypass air outflow path 10 are opened and drilled along the longitudinal direction XX of the control member insertion hole 20.
On the other hand, the control hole member 21 inserted and arranged in the control member insertion hole 20 is an annular member having a sliding valve guide tube 21a drilled in the longitudinal direction XX.
The first bypass air outflow hole 5 facing the first bypass air outflow path 8 and the second bypass air facing the second bypass air outflow path 10 are formed on one side wall 21b of the longitudinal direction XX of the slide valve guide cylinder 21a. The outflow holes 6 are formed with a hole pitch P, and the slits 4 are formed in the other side wall 21c.
The bypass valve 11 that is moved and operated in the longitudinal direction XX by the drive member M is movably disposed in the slide valve guide tube 21 a of the control hole member 21 and the opening of the first bypass air outflow hole 5. The first valve portion 11a that controls the second valve portion 11b that controls the opening of the second bypass air outflow hole 6, and the small diameter that connects the opposing surfaces 11a1 and 11b1 of the first valve portion 11a and the second valve portion 11b The connecting portion 11c is integrally formed along the longitudinal direction,
A first bypass air chamber 12 is formed by the bottom portion 20a of the control member insertion hole 20 and the end surface 11a2 of the first valve 11a opposite thereto,
The first bypass air supplied to the first bypass air chamber 12 through the bypass air inflow hole 3 flows out of the first bypass air through the control opening of the first bypass air outflow hole 5 controlled by the first valve portion 11a. Supply to road 8,
On the other hand, the second bypass air chamber 13 is formed by the opposed end surfaces 11a1, 11b1 and the small diameter connecting portion 11c of the first valve portion 11a and the second valve portion 11b.
The second bypass air supplied from the first bypass air chamber 12 through the slit groove 4 to the second bypass air chamber has a control opening of the second bypass air outflow hole 6 controlled by the second valve portion 11b. A bypass air control device, wherein the bypass air control device is supplied to the second bypass air outflow passage 10. In the sliding valve guide cylinder, a bypass air inflow hole connected to the atmosphere side and a plurality of bypass air outflow holes connected to a plurality of intake passages downstream from the throttle valve are opened, and the bypass air outflow hole is a sliding valve. In a bypass air control device that is controlled to open and close by a bypass valve disposed in the guide tube,
The bypass air inflow hole 3 is opened in the other side wall of the control member insertion hole 20 formed along the longitudinal direction XX, and the control member insertion hole 20 is formed in one side wall of the control member insertion hole 20. The first bypass air outflow path 8 and the second bypass air outflow path 10 are opened and drilled along the longitudinal direction XX of
On the other hand, the control hole member 21 inserted and arranged in the control member insertion hole 20 is an annular member having a sliding valve guide tube 21a drilled in the longitudinal direction XX.
The first bypass air outflow hole 5 facing the first bypass air outflow path 8 and the second bypass air outflow facing the second bypass air outflow path 10 are formed on one side wall of the longitudinal direction XX of the slide valve guide cylinder 21a. The hole 6 is drilled with a hole pitch P and the slit groove 4 is drilled on the other side wall.
Further, the bypass valve 11 that is moved and operated in the longitudinal direction XX by the drive member is movably disposed in the slide valve guide cylinder 21a of the control hole member 21, and the opening of the first bypass air outflow hole 5 is opened. The first valve part 11a to be controlled, the second valve part 11b to control the opening of the second bypass air outflow hole 6, and the small diameter connection to connect the opposing surfaces 11a1 and 11b1 of the first valve part 11a and the second valve part 11b. Part 11c is integrally formed along the longitudinal direction, and an adjustment screw 15 facing the end face 11a2 of the first valve part 11a is screwed to the bottom part 20a of the control member insertion hole 20,
A first bypass air chamber 12 is formed by the bottom portion 21a of the sliding valve guide tube 21a of the control hole member 21 and the end surface 11a2 of the first valve portion 11a facing it.
The first bypass air supplied to the first bypass air chamber 12 through the bypass air inflow hole 3 and the slit groove 4 has a control opening of the first bypass air outflow hole 5 controlled by the first valve portion 11a. 1 supply to the bypass air outflow path 8,
On the other hand, the second bypass air chamber 13 is formed by the opposed end surfaces 11a1, 11b1 and the small diameter connecting portion 11c of the first valve portion 11a and the second valve portion 11b.
The second bypass air supplied to the second bypass air chamber via the bypass air inflow hole 3 and the slit groove 4 has a second control opening of the second bypass air outflow hole 6 controlled by the second valve portion 11b. A bypass air control device, characterized in that the bypass air control device is supplied to the bypass air outflow passage 10.

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