JP7323418B2 - Intake control device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake control device for controlling intake air of an internal combustion engine.

Conventionally, there is known an intake control device that includes an intake passage that is a part of an intake pipe connected to a combustion chamber of an internal combustion engine, and a control valve that is arranged in the intake passage and controls the intake air ( For example, see Patent Document 1).

The control valve of the intake control device disclosed in Patent Document 1 slides a rectangular valve element across an intake passage having an elongated cross section from one side to the other side of the intake passage. I am trying to change the flow rate of intake air passing through. The driving force transmission mechanism for sliding the valve body is arranged on the other side of the intake passage, downstream of the surface on which the valve body is arranged.

On the other hand, in order to improve the reaction speed of changes in engine output in response to changes in the opening of the intake passage by the control valve, the valve element should be placed as far downstream as possible from the intake pipe (intake port side), It is preferable to reduce the volume of the intake pipe.

JP-A-5-312045

However, according to the intake control device of Patent Document 1, the drive force transmission mechanism is arranged downstream of the valve body. It will interfere with the cylinder head of the engine. Therefore, according to this configuration, it is not possible to improve the reaction speed of the engine output by arranging the valve element further downstream.

SUMMARY OF THE INVENTION An object of the present invention is to provide an intake control device in which a valve element can be arranged further downstream without any trouble.

The intake control device of the present invention includes:
An intake control device comprising: a body internally defining an intake passage that is at least a part of an intake pipe leading to a combustion chamber of an internal combustion engine; and a valve element disposed within the intake passage,
the body includes a sealing plane formed by a plane extending at an angle to the direction in which the intake passage extends;
The valve body has a valve plane configured by a plane that abuts on the seal plane, and slides on the seal plane via the valve plane to adjust the opening of the intake passage, and configured to increase the opening of the intake passage when moving from one side of the intake passage to the other side,
the sealing plane is arranged from the one side to the other side of the intake passage so as to be inclined upstream of the intake passage with respect to the extending direction of the intake passage;
A first transmission mechanism for driving the valve body is arranged on the other side of the intake passage,
The first transmission mechanism is arranged upstream of the intake passage with respect to a first reference plane including the seal plane ,
The first transmission mechanism includes a drive transmission shaft that is arranged on the other side of the intake passage and rotates,
The drive transmission shaft is rotationally driven by an electric motor having a drive shaft arranged substantially parallel to the rotation axis of the drive transmission shaft,
A second transmission mechanism is provided between the electric motor and the drive transmission shaft for transmitting a driving force from the electric motor to the drive transmission shaft,
the body has an upstream opening and a downstream opening of the intake passage,
Assuming that a straight line connecting the upstream center point, which is the area center of the upstream opening, and the downstream center point, which is the area center of the downstream opening, is the passage center line,
When viewed from a direction orthogonal to a second reference plane including a sliding center line that is parallel to the sliding direction of the valve body and intersects with the passage center line and the passage center line, the electric motor is positioned in the intake passage. disposed on the one side opposite to the drive transmission shaft across the
A first reference line that intersects the rotation axis of the drive transmission shaft and the rotation axis of the drive shaft when viewed in a direction orthogonal to the second reference plane, and the first reference plane are defined by the passage center line. , and the same angle β on the side of the first reference line is greater than the angle α on the side of the first reference plane,
Assuming that a plane parallel to the passage center line, orthogonal to the rotation axis of the drive shaft, and in contact with the edge of the intake passage on the side where the second transmission mechanism is arranged is defined as a third reference plane, the electric motor At least part of it is arranged closer to the intake passage than the third reference plane .

According to the present invention, since the first transmission mechanism is arranged on the other side of the intake passage and on the upstream side of the first reference plane, the intake air control device is arranged such that the intake air is directed from above to below the cylinder head of the internal combustion engine. In the case of the downdraft arrangement so as to flow toward, the intake control device can be brought closer to the cylinder head without the first transmission mechanism interfering with the cylinder head. As a result, it is possible to dispose the valve element further downstream, reduce the volume of the intake pipe on the downstream side of the valve element, and improve the response of the internal combustion engine.
Further, by making the equivalence angle β on the side of the first reference line as close to a right angle as possible, the distance from the electric motor to the drive transmission shaft can be shortened, and the size of the second transmission mechanism can be reduced.

In the present invention,
the body has an upstream opening and a downstream opening of the intake passage,
A straight line connecting an upstream center point that is the area center of the upstream opening and a downstream center point that is the area center of the downstream opening is defined as a passage center line,
The area of each fine opening and the downstream center of each fine opening obtained by dividing the shape of the downstream opening into an infinite number by a first group of parallel equally spaced dividing lines when viewed in a direction parallel to the center line of the passage. The direction orthogonal to the first group of parallel equally spaced dividing lines when the sum of products with the shortest distance from the point is the maximum value is defined as the first major axis direction,
an area of each fine passage cut shape obtained by dividing the passage cut shape, which is a cross-sectional shape of the intake passage along an arbitrary plane perpendicular to the passage center line, into an infinite number of pieces by a second group of parallel equally spaced dividing lines; If the direction orthogonal to the second group of parallel equally spaced dividing lines when the sum of the products of the shortest distances from the area center of the passage cutting shape of each minute passage cutting shape becomes the maximum value is defined as the second major axis direction. ,
The intake passage has a direction continuation section in which the first longitudinal direction and the second longitudinal direction are continuously substantially parallel from the downstream opening,
The sealing plane may be configured along at least part of a plane that intersects at least part of the direction continuation section.

According to this, if the cross-sectional area of the direction continuation section is the same as the cross-sectional area in the case where the section of the section is assumed to be a perfect circle, the valve body is positioned in the first longitudinal direction or the second longitudinal direction. When moving in the direction perpendicular to the axial direction, the valve body moves from the fully closed position where the degree of opening of the intake passage is minimum to the fully open position where the degree of opening is maximum, rather than when the valve body is a perfect circle. stroke amount can be reduced. As a result, the size of the first transmission mechanism and the portion that accommodates the valve body can be reduced.

in this case,
An injection port of a fuel injection valve for injecting fuel into the intake pipe is arranged on the one side of the intake passage downstream of the valve body in the intake passage,
The main body of the fuel injection valve may be arranged on the one side of the intake passage and downstream of the electric motor.

According to this, since the first reference plane and the first reference line have the above-described positional relationship, the electric motor is positioned upstream of the intake passage, while the fuel injection valve is positioned on the one side of the intake passage. and located downstream of the electric motor, the injection port of the fuel injection valve can be arranged at a position that is advantageous for the vaporization of the fuel and the homogenization of the air-fuel mixture when the intake passage is in the low opening state. can.

in this case,
A first coupler to which a first power supply terminal for supplying power to the fuel injection valve is connected, and a second coupler to which a second power supply terminal for supplying power to the electric motor is connected to the one side of the intake passage. and
A first opening in which the first coupler receives the first power supply terminal and a second opening in which the second coupler receives the second power supply terminal may both open to the one side.

According to this, since both the first opening of the first coupler and the second opening of the second coupler are open to the one side, the wiring for power supply to the fuel injection valve and the electric motor can be arranged advantageously. can be turned around.

In the present invention,
An opening sensor that detects the rotation angle of the drive transmission shaft,
The opening sensor may be arranged at an end of the drive transmission shaft on a side where the second transmission mechanism is arranged when viewed in a direction parallel to the passage centerline.

According to this, when the intake control device is mounted on the engine of the motorcycle in a downdraft arrangement, the opening sensor and the second transmission mechanism can be arranged along the frame of the motorcycle. can avoid interfering with the frame of

1 is a perspective view showing an intake control device according to one embodiment of the present invention; FIG. FIG. 2 is a front view of the intake control device of FIG. 1 as seen from the downstream side; 3 is a cross-sectional view taken along line III-III of FIG. 2; FIG. 3 is an enlarged view of a part of FIG. 2; FIG. 5A is a view showing the first longitudinal direction in the shape of the downstream opening of the intake control device of FIG. 1, and FIG. 5B is a view showing the second longitudinal direction in the cut shape of the intake passage. . FIG. 2 is a perspective view showing a valve body held by a slide block in the intake control device of FIG. 1; FIG. 2 is a perspective view showing a second transmission mechanism in the intake control device of FIG. 1; 2 is an enlarged view showing a part of the intake control device of FIG. 1 when viewed from the upstream side; FIG. 2 is a view showing the positional relationship between the frame of the motorcycle and the intake control device when the intake control device of FIG. 1 is mounted on the motorcycle; FIG. FIG. 2 is a diagram showing the positional relationship between the engine of the motorcycle and the intake control device when the intake control device of FIG. 1 is mounted on the motorcycle; 11A to 11C are diagrams showing other three examples of the shape of the downstream opening in the intake control device of FIG. 1. FIG.

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, an intake control device 1 according to an embodiment of the present invention includes two intake passages 2, each of which is at least a part of an intake pipe leading to a combustion chamber of an internal combustion engine. and a valve body 4 arranged in each intake passage 2.

That is, the intake control device 1 is suitable for being mounted on an in-line four-cylinder engine as an internal combustion engine. The body 3 has an upstream opening 5 and a downstream opening 6 of the intake passage 2 . A funnel F is provided on the upstream side of the intake passage 2 .

Here, as shown in FIGS. 3 and 4, a passage center line 7 is a straight line connecting an upstream center point P1, which is the center of area of the upstream opening 5, and a downstream center point P2, which is the center of area of the downstream opening 6. do.

Also, as shown in FIG. 5A, the shape of the downstream side opening 6 when viewed in a direction parallel to the passage center line 7 is divided into an infinite number of minute openings 9 by a group of first parallel equally spaced dividing lines 8. The direction orthogonal to the first group of parallel equally spaced dividing lines 8 when the sum of the products of the area and the shortest distance S1 from the downstream center point P2 of each minute opening 9 is the maximum value is defined as the first major axis direction d1. do.

Further, as shown in FIG. 5B, the cross-sectional shape 10 of the intake passage 2, which is the cross-sectional shape obtained by cutting the intake passage 2 along an arbitrary plane perpendicular to the passage center line 7, is divided into an infinite number by the second group of parallel equally spaced dividing lines 11. A second group of parallel equally spaced dividing lines when the sum of the products of the areas of the divided micropassage cutting shapes 12 and the shortest distances S2 from the center of area P3 of the passage cutting shapes 10 of the micropassage cutting shapes 12 is maximized. 11 is defined as a second major axis direction d2.

Then, the intake passage 2 has a direction continuation section 13 (see FIG. 3) in which the first major axis direction d1 and the second major axis direction d2 are continuously substantially parallel from the downstream opening 6. As shown in FIG. In this embodiment, the direction continuation section 13 is the entire area of the intake passage 2 .

As shown in FIG. 3 , the body 3 comprises a sealing plane 14 arranged along at least part of a plane that intersects at least part of the direction continuation section 13 . The sealing plane 14 is a wall portion of the intake passage 2 and is formed by a plane extending at an angle to the direction in which the intake passage 2 extends. It is arranged so as to be inclined upstream of the intake passage 2 with respect to the passage center line 7 .

The valve body 4 has a valve plane 15 configured by a plane that contacts the seal plane 14 , and slides against the seal plane 14 via the valve plane 15 to adjust the opening of the intake passage 2 (that is, the opening of the valve body 4 ). degree of opening and closing of the intake passage 2 by movement).

That is, the opening degree of the intake passage 2 is adjusted by closing the cross section of the intake passage 2 cut by a plane including the seal plane 14 by the corresponding area of the valve plane 15 at each position of the valve body 4 . The direction in which the valve body 4 slides along the seal plane 14 is the direction (minor axis direction) perpendicular to the first major axis direction d1 or the second major axis direction d2.

A slide block is guided by the body 3 so as to be translatable in the body 3 and moves along the sealing plane 14 while holding the valve body 4 so that the valve body 4 can slide against the sealing plane 14. 16 are provided. Between the body 3 and the slide block 16, there is provided friction reducing means for reducing friction when the body 3 guides the slide block 16. As shown in FIG.

As shown in FIG. 6, in this embodiment, a roller 17 that is rotatably supported by a slide block 16 and rolls on a guide plane provided on the body 3 is used as the friction reducing means.

As shown in FIG. 3, the slide block 16 has a housing hole 18 that houses at least a portion of the valve body 4 on the upstream side so that the slide block 16 and the valve body 4 can move relative to each other. An airtight member 19 is provided between the slide block 16 and the valve body 4 to keep the housing hole 18 airtight. For example, an O-ring can be used as the airtight member 19 .

At this time, the slide block 16 and the valve body 4 are fitted so as to be mutually movable in the depth direction of the housing hole 18 , and the valve body 4 has upstream and downstream sides of the valve body 4 . , and the receiving pressure reducing space 20 inside the housing hole 18 to the downstream side of the valve body 4 of the intake passage 2 . The communication hole 21 keeps the internal pressure of the receiving pressure reducing space 20 equal to the low pressure downstream of the intake passage 2 of the valve body 4 . As a result, a receiving pressure reducing space 20 is formed between the slide block 16 and the valve body 4 to reduce the force that urges the valve body 4 toward the sealing plane 14 .

As shown in FIG. 6, the valve body 4 is recessed along the valve plane 15 at the valve end 22, which is the end on the one d3 (see FIG. 3) side of the valve plane 15. A surface missing portion 23 is provided. That is, the surface missing portion 23 extends from the tip of the valve end portion 22 along the valve plane 15 toward the other d4 side (see FIG. 3), and has a larger curvature than the inner surface of the intake passage 2 on the other d4 side. have curvature.

Further, the surface missing portion 23 is formed before the valve end portion 22 when the valve body 4 reaches the fully closed state where the degree of opening of the intake passage 2 is minimum and the fully open state where the degree of opening is maximum. It is provided so as to be exposed in the intake passage.

With such components, the intake control device 1 is such that when the valve body 4 slides on the seal plane 14 and moves from the one d3 side of the intake passage 2 to the other d4 side of the intake passage 2, the opening degree of the intake passage 2 is increased. configured to increase.

As shown in FIG. 3 , the driving force for sliding the valve body 4 against the sealing plane 14 is transmitted by the first transmission mechanism 24 . The first transmission mechanism 24 is arranged on the other d4 side of the intake passage 2 and upstream of the intake passage 2 with respect to the first reference plane 25 including the seal plane 14 .

The first transmission mechanism 24 includes a drive transmission shaft 26 that is arranged on the other side d4 of the intake passage 2 and rotates, a base end fixed to the drive transmission shaft 26, and a tip end rotatable and parallel to the slide block 16. and an arm-shaped valve body driving portion 27 that is movably linked.

The drive transmission shaft 26 is rotationally driven by an electric motor 30 having a drive shaft 29 (see FIG. 7) arranged substantially parallel to the rotation axis 28 of the drive transmission shaft 26 . In the space that accommodates the first transmission mechanism 24, a valve body housing portion 31 is provided for housing the valve body 4 that slides in the opening direction.

That is, the valve body housing portion 31 includes the tip portion of the valve body drive portion 27 which swings due to the rotation of the drive transmission shaft 26 when the valve body 4 is opened, the slide block 16 linked thereto, and the slide block 16 which is held thereon. As shown in FIG. 7, between the electric motor 30 and the drive transmission shaft 26, there are: A second transmission mechanism 32 is provided which is configured by a distance gear 32 a and the like and which transmits driving force from the electric motor 30 to the drive transmission shaft 26 . The second transmission mechanism 32 is covered by a sensor cover 32b.

As shown in FIGS. 3 and 4, when viewed from a direction orthogonal to a second reference plane 33 that includes the passage center line 7 and the sliding center line that is parallel to the direction in which the valve body 4 slides and intersects the passage center line 7, In this case, the electric motor 30 is arranged on the one d3 side opposite to the drive transmission shaft 26 with the intake passage 2 interposed therebetween.

Also, when viewed from a direction orthogonal to the second reference plane 33, a first reference line 35 intersecting the rotation axis 28 of the drive transmission shaft 26 and the rotation axis 36 of the drive shaft 29 and the first reference plane 25 , intersects the line L including the passage center line 7 at the same acute angle, and the same angle β on the side of the first reference line 35 is greater than the same angle α on the side of the first reference plane 25 big.

As shown in FIG. 8, a plane parallel to the passage centerline 7, orthogonal to the rotation axis 28 of the drive transmission shaft 26, and in contact with the edge of the intake passage 2 on the side where the second transmission mechanism 32 is arranged is defined as a third plane. Assuming the reference plane 37 , at least part of the electric motor 30 is arranged closer to the intake passage 2 than the third reference plane 37 .

Further, an opening sensor 38 for detecting the rotation angle of the drive transmission shaft 26 is provided at the end of the drive transmission shaft 26 on the side where the second transmission mechanism 32 is arranged when viewed in a direction parallel to the passage center line 7 . placed. The detection portion of the opening sensor 38 is provided on the rear side of the sensor cover 32b. In FIG. 7, the part to be detected of the opening sensor 38 fixed to the drive transmission shaft 26 is shown.

As shown in FIG. 3, an injection port of a fuel injection valve 39 for injecting fuel into the intake passage 2 is located downstream of the valve body 4 in the intake passage 2 and on one side d3 of the intake passage 2. 41 are placed. The main body of the fuel injection valve 39 is arranged on the one d3 side of the intake passage 2 and downstream of the electric motor 30 . On one side d3 of the intake passage 2, a first coupler 42 to which a first power supply terminal for supplying power to the fuel injection valve 39 is connected, and a second coupler 42 to which a second power supply terminal for supplying power to the electric motor 30 is connected. A coupler 43 is provided. A first opening 44 for receiving the first power supply terminal of the first coupler 42 and a second opening 45 for receiving the second power supply terminal of the second coupler 43 are both open on one side d3.

As shown in FIGS. 3 and 4, two joints 40 are provided downstream of the valve element 4 in the intake passage 2 and on the other d4 side. Each joint 40 is connected to a passage opening in the inner wall of the intake passage 2 on the other downstream side d4 side. One joint 40 is connected to a conduit for introducing fuel purged from the canister into the intake passage 2 . The other joint 40 is connected to a conduit leading to a sensor that measures the pressure downstream of the valve body 4 in the intake pipe.

In this configuration, when the intake control device 1 controls the intake air, the electric motor 30 is driven to adjust the position of the valve body 4 so that the opening of the intake passage 2 is the target.

At this time, the driving force of the electric motor 30 is transmitted to the drive transmission shaft 26 of the first transmission mechanism 24 via the second transmission mechanism 32, and as the drive transmission shaft 26 rotates, the valve body driving portion 27 swing. As a result, the slide block 16 is moved along the first reference plane 25 from the one d3 side of the intake passage 2 to the other d4 side, or in the opposite direction.

During this time, the rotation angle of the drive transmission shaft 26 is monitored by the opening sensor 38, and the result is fed back to the driving amount of the electric motor 30 while referring to the target opening. It is positioned in the degree of opening.

When the valve body 4 moves during this period, a seal is formed between the seal plane 14 and the valve plane 15, but the load applied between the seal plane 14 and the valve plane 15 is such that the communication hole 21 receives pressure. It is reduced by keeping the pressure inside the reduction space 20 equal to the low pressure downstream of the intake passage 2 of the valve body 4 .

Furthermore, due to the difference between the pressure inside the pressure reducing space 20 and the higher pressure on the upstream side of the slide block 16, a force is applied to the slide block 16 to urge the downstream side of the intake passage. A roller 17 is interposed between them. Therefore, the sliding of the valve body 4 with respect to the sealing plane 14 is extremely smooth.

At this time, when the intake passage 2 opens from the fully closed state with the movement of the valve body 4 , the surface missing portion 23 is exposed in the intake passage 2 before the valve end portion 22 . Also, the seal plane 14 is inclined toward the upstream side of the intake passage 2 . Therefore, when the opening is in a low opening state, the intake air is rectified and concentrated on the fuel flow from the fuel injection valve 39, promoting the vaporization of the fuel and the homogenization of the air-fuel mixture.

Until reaching the fully open state, the valve body 4 moves in a direction (minor axis direction) perpendicular to the first and second major axis directions d1 and d2, such as the major axis direction of the elliptical cross section of the intake passage 2. . Therefore, the fully opened state is reached with a relatively small amount of movement relative to the size of the cross-sectional area of the intake passage 2 . Similarly, when returning from the fully open state to the fully closed state, a relatively small amount of movement is sufficient.

As described above, according to this embodiment, when the valve body 4 moves, sealing is performed between the seal plane 14 and the valve plane 15, so the cross-sectional shape of the intake passage 2 is not circular but complicated. Even in this case, the opening degree of the intake passage 2 can be precisely set according to the movement position of the valve body 4 without requiring high accuracy of the gap between the intake passage 2 and the valve body 4 . Therefore, even if the cross-sectional shape of the intake passage 2 is complicated and the degree of opening of the intake passage 2 is small, the amount of intake air can be adjusted accurately.

Further, a part of the valve body 4 is held in the housing hole 18 of the slide block 16, and the inside of the housing hole 18 is the receiving pressure reduction space 20 which is equal to the pressure downstream of the valve body 4, so that the valve plane 15 is The load applied between the part and the sealing plane 14 can be reduced. Furthermore, since the roller 17 is interposed between the body 3 and the slide block 16, the driving force required to move the valve body 4 and the slide block 16 is reduced, and the wear of the valve body 4 and the like during this movement is reduced. can be reduced.

In addition, since the sealing plane 14 is inclined with respect to the intake passage 2 as described above, when the opening degree of the intake passage 2 is small, the intake air flows from the upstream side of the valve body 4 to the one d3 side of the intake passage 2. , and flows on the one side d3 of the valve body 4 . Thereby, the intake air can be rectified.

Further, since the injection port 41 of the fuel injection valve 39 for injecting fuel into the intake pipe is arranged downstream of the valve body 4 in the intake passage 2 and on the one d3 side of the intake passage 2, 2 is small, a strong flow of intake air collides with the flow of fuel discharged from the injection port 41, and vaporization of the fuel and homogenization of the air-fuel mixture can be achieved.

Further, as shown in FIG. 9, when the intake control device 1 is mounted on the engine 46 in a downdraft arrangement with respect to the motorcycle, the opening sensor 38, the second transmission mechanism 32 and the like are arranged and , the shape of the sensor cover 32b along these can avoid the intake control device 1 from interfering with the frame 47 of the motorcycle.

Further, as shown in FIG. 3, the first transmission mechanism 24 is arranged on the other d4 side of the intake passage 2 and upstream of the intake passage 2 with respect to the first reference plane 25 including the seal plane 14. 10, when the intake control device 1 is arranged downdraft with respect to the cylinder head 48 of the engine 46, the first transmission mechanism 24 does not interfere with the cylinder head 48, and the intake control device 1 is moved to the cylinder head 48. can be brought closer to As a result, the volume of the intake pipe on the downstream side of the valve body 4 is reduced, so that the response of the engine 46 can be enhanced.

Further, since the sealing plane 14 is configured as a plane that intersects the direction continuation section 13, the stroke amount of the valve body 4 is reduced from the fully closed state where the degree of opening of the intake passage 2 is minimized to the fully opened state where it is maximized. can be made As a result, the first transmission mechanism 24 and the valve housing portion 31 can be made smaller.

Also, since the angle β formed by the first reference line 35 with respect to the extending direction of the intake passage 2 (the direction of the passage centerline 7) is made as close to a right angle as possible, the distance from the electric motor 30 to the drive transmission shaft 26 is can be shortened, and the size of the second transmission mechanism 32 can be reduced.

Further, since the first reference plane 25 and the first reference line 35 have the above-described positional relationship, the electric motor 30 is positioned upstream of the intake passage 2, so that the degree of opening of the intake passage 2 is small. The injection port 41 of the fuel injection valve 39 can be arranged at a position that is advantageous for the vaporization of the fuel and the homogenization of the air-fuel mixture in the combustion state.

In addition, since the first opening 44 of the first coupler 42 and the second opening 45 of the second coupler 43 are both open on the one side d3, it is advantageous in terms of handling of wiring connected to these. .

Further, when the intake passage 2 is opened from the fully closed state, the surface missing portion 23 is exposed in the intake passage 2 before the valve end portion 22 is exposed. By concentrating, it is possible to further promote fuel vaporization and homogenization of the air-fuel mixture at low opening.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto. For example, the shape of the downstream opening of the intake passage 2 may be downstream openings 6a to 6c having shapes as shown in FIGS. 11A to 11C, respectively. Also in each example, the first major axis direction d1 is defined as in the case of FIG. 5A. Further, the internal combustion engine to which the present invention is applied is not limited to an in-line four-cylinder engine, and may be of another type and number of cylinders.

DESCRIPTION OF SYMBOLS 1... Intake control device 2... Intake passage 3... Body 4... Valve element 5... Upstream side opening 6, 6a-6c... Downstream side opening 7... Passage center line 8... First parallel equal interval division Line group 9 Fine opening 10 Passage cutting shape 11 Second parallel equally spaced dividing line group 12 Fine passage cutting shape 13 Direction continuation section 14 Seal plane 15 Valve plane 16 Slide block 17 Roller 18 Storage hole 19 Airtight member 20 Receiving pressure reducing space 21 Communication hole 22 Valve end portion 23 Missing surface portion 24 First transmission mechanism 25 First reference plane 26 Drive transmission shaft 27 Valve body drive section 28 Rotational axis 29 Drive shaft 30 Electric motor 31 Valve housing section 32 Second transmission mechanism 32a Distance gear 32b Sensor cover 33 Second reference plane 35 First reference line 36 Axis of rotation 37 Third reference plane 38 Opening sensor 39 Fuel injection valve 40 Joint 41... injection port, 42... first coupler, 43... second coupler, 44... first opening, 45... second opening, 46... engine, 47... frame, 48... cylinder head, d1... first long shaft direction, d2...second major axis direction, d3...one side, d4...other side, F...funnel, P1...upstream center point, P2...downstream center point, S1, S2...shortest distance, P3...area center.

Claims (5)

An intake control device comprising: a body internally defining an intake passage that is at least a part of an intake pipe leading to a combustion chamber of an internal combustion engine; and a valve element disposed within the intake passage,
the body includes a sealing plane formed by a plane extending at an angle to the direction in which the intake passage extends;
The valve body has a valve plane configured by a plane that abuts on the seal plane, and slides on the seal plane via the valve plane to adjust the opening of the intake passage, and configured to increase the opening of the intake passage when moving from one side of the intake passage to the other side,
the sealing plane is arranged from the one side to the other side of the intake passage so as to be inclined upstream of the intake passage with respect to the extending direction of the intake passage;
A first transmission mechanism for driving the valve body is arranged on the other side of the intake passage,
The first transmission mechanism is arranged upstream of the intake passage with respect to a first reference plane including the seal plane ,
The first transmission mechanism includes a drive transmission shaft that is arranged on the other side of the intake passage and rotates,
The drive transmission shaft is rotationally driven by an electric motor having a drive shaft arranged substantially parallel to the rotation axis of the drive transmission shaft,
A second transmission mechanism is provided between the electric motor and the drive transmission shaft for transmitting a driving force from the electric motor to the drive transmission shaft,
the body has an upstream opening and a downstream opening of the intake passage,
Assuming that a straight line connecting the upstream center point, which is the area center of the upstream opening, and the downstream center point, which is the area center of the downstream opening, is the passage center line,
When viewed from a direction orthogonal to a second reference plane including a sliding center line that is parallel to the sliding direction of the valve body and intersects with the passage center line and the passage center line, the electric motor is positioned in the intake passage. disposed on the one side opposite to the drive transmission shaft across the
A first reference line that intersects the rotation axis of the drive transmission shaft and the rotation axis of the drive shaft when viewed in a direction orthogonal to the second reference plane, and the first reference plane are defined by the passage center line. and form an acute equilateral angle with respect to, the equilateral angle on the side of the first reference line is greater than the equilateral angle on the side of the first reference plane,
Assuming that a plane parallel to the passage center line, orthogonal to the rotation axis of the drive shaft, and in contact with the edge of the intake passage on the side where the second transmission mechanism is arranged is defined as a third reference plane, the electric motor An intake control device , wherein at least a portion thereof is arranged closer to the intake passage than the third reference plane . The intake control device according to claim 1,
the body has an upstream opening and a downstream opening of the intake passage,
A straight line connecting an upstream center point that is the area center of the upstream opening and a downstream center point that is the area center of the downstream opening is defined as a passage center line,
The area of each fine opening and the downstream center of each fine opening obtained by dividing the shape of the downstream opening into an infinite number by a first group of parallel equally spaced dividing lines when viewed in a direction parallel to the center line of the passage. The direction orthogonal to the first group of parallel equally spaced dividing lines when the sum of products with the shortest distance from the point is the maximum value is defined as the first major axis direction,
an area of each fine passage cut shape obtained by dividing the passage cut shape, which is a cross-sectional shape of the intake passage along an arbitrary plane perpendicular to the passage center line, into an infinite number of pieces by a second group of parallel equally spaced dividing lines; If the direction orthogonal to the second group of parallel equally spaced dividing lines when the sum of the products of the shortest distances from the area center of the passage cutting shape of each minute passage cutting shape becomes the maximum value is defined as the second major axis direction. ,
The intake passage has a direction continuation section in which the first longitudinal direction and the second longitudinal direction are continuously substantially parallel from the downstream opening,
The intake control device, wherein the sealing plane is configured along at least a portion of a plane that intersects at least a portion of the direction continuation section. The intake control device according to claim 1 ,
An injection port of a fuel injection valve for injecting fuel into the intake pipe is arranged on the one side of the intake passage downstream of the valve body in the intake passage,
The intake control device, wherein the main body of the fuel injection valve is arranged on the one side of the intake passage and downstream of the electric motor. The intake control device according to claim 3 ,
A first coupler to which a first power supply terminal for supplying power to the fuel injection valve is connected, and a second coupler to which a second power supply terminal for supplying power to the electric motor is connected to the one side of the intake passage. and
A first opening in which the first coupler receives the first power supply terminal and a second opening in which the second coupler receives the second power supply terminal both open to the one side. intake control device. The intake control device according to claim 1 ,
An opening sensor that detects the rotation angle of the drive transmission shaft,
The intake control device, wherein the opening sensor is arranged at the end of the drive transmission shaft on the side where the second transmission mechanism is arranged when viewed in a direction parallel to the passage centerline.

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