JP5360012B2 - Intake device for internal combustion engine - Google Patents

Description

  The present invention relates to an intake device for an internal combustion engine that drifts intake air (intake air) flowing through an air flow path communicating with a combustion chamber of the internal combustion engine (engine) to generate a swirling flow (intake vortex flow) in the combustion chamber. In particular, a tumble control valve (TCV) or a swirl control valve that enhances the intake vortex flow (tumble flow or swirl flow) in the combustion chamber of the engine by shifting the air flow (intake flow) flowing through the air flow channel toward the upper side of the air flow channel. The present invention relates to an intake device for an internal combustion engine equipped with (SCV).

[Conventional technology]
Conventionally, as shown in FIG. 8, a fluid flow rate having a rotary valve 103 rotatably accommodated in a valve chamber 102 of a housing 101 and an actuator for reciprocating a shaft 104 of the rotary valve 103 in the rotational direction thereof. A control valve is provided to open and close the rotary valve 103 via the shaft 104 by the torque of the actuator, thereby changing the opening area of the air flow path 105 such as the intake passage and the intake port of the engine to reduce the intake air (intake). An intake device for an internal combustion engine that controls the flow rate has been proposed (see, for example, Patent Document 1).

The housing 101 has a cylindrical curved wall 106 having the same center of curvature as the rotary valve 103 so as to be radially outward from the outer surface of the rotary valve 103 and partially surround the valve chamber 102.
The rotary valve 103 has an opening 107 through which intake air can pass even when the rotary valve 103 is closed.
The fluid flow control valve increases or decreases the opening area of the air flow path 105 by opening and closing the rotary valve 103 in the rotation direction. Thereby, the flow rate of the intake air flowing through the valve chamber 102 of the housing 101 is variably controlled according to the opening area of the air flow path 105.

[Conventional technical problems]
By the way, by closing the lower side of the intake passage and the intake port of the fluid flow control valve described in Patent Document 1, the intake flow flowing through the intake passage and the intake port is shifted to the upper side of the intake passage and the intake port. It may be used as a tumble control valve (TCV) that enhances the tumble flow in the combustion chamber of the engine.
In this case, for the purpose of further strengthening the tumble flow in the combustion chamber of the engine, as shown in FIG. 9, the width of the opening 107 (opening width) is made narrower than a predetermined width dimension, and the intake passage is formed. Even if a strong intake flow is generated at the center in the width direction of the air flow path 105 such as an intake port, the intake flow that has passed through the opening 107 and flowed downstream in the intake flow direction is the width of the air flow path 105. There is a tendency to spread toward both sides of the direction (the tendency of the intake flow to bend outward in an arc).
As a result, a strong intake flow cannot be generated in the center in the width direction of the air flow path 105 such as the intake passage and the intake port, so that the tumble flow in the combustion chamber of the engine cannot be further strengthened, and the combustion There has been a problem that improvement in efficiency and improvement in fuel consumption due to stabilization of combustion cannot be expected.

Japanese Patent Publication No. 4-78874

  An object of the present invention is to make it possible to further strengthen the swirl flow generated in the combustion chamber of the internal combustion engine by strongly drifting the air passing through the opening of the rotary valve, that is, generating a strong air flow. It is to provide an intake device for an engine.

The invention described in claim 1 includes a casing in which an air flow path is formed, and an air flow control valve that adjusts the swirling flow generated in the combustion chamber of the internal combustion engine by an opening / closing operation.
The air flow control valve reciprocates on a rotation axis extending in a direction orthogonal to the air flow direction in the air flow path of the casing, and on a rotation operation line that is a curve of a predetermined radius of curvature around the rotation axis. It is composed of a rotary valve or the like.
The rotary valve is installed so as to extend along the both side edges of the opening in the width direction of the opening, and to extend in the rotation direction of the rotary valve. The valve rib is provided.
The plurality of valve ribs are installed so as to protrude from the surface of the rotary valve toward the downstream side in the air flow direction in the casing or outward in the radial direction of the rotary shaft.

According to the first aspect of the present invention, when the rotary valve is fully closed, the airflow flowing out from the opening of the rotary valve to the air flow path is along the both side edges in the width direction of the opening of the rotary valve. In addition, the flow is rectified (obstructed) by a plurality of valve ribs installed so as to protrude from the surface of the rotary valve toward the downstream side in the air flow direction in the casing or outward in the radial direction of the rotating shaft. This makes it difficult for the air flow flowing out from the opening of the rotary valve to the air flow path to be bent in an arc shape outwardly in the width direction from both side edges in the width direction of the opening, that is, both sides of the air flow path in the width direction. Therefore, the air flow flowing through the air flow path can be strongly biased (to one side of the air flow path in the vertical direction or the width direction).
Thereby, since a strong air flow can be generated in the air flow path, it is possible to further strengthen the swirl flow generated in the combustion chamber of the internal combustion engine. Therefore, it is possible to improve the combustion efficiency of the internal combustion engine and improve the fuel consumption by stabilizing the combustion.
The opening may be opened in the vicinity of the channel wall on one side of the casing in the vertical direction when the air flow control valve is fully closed. Moreover, you may make it open an opening part in the center part of the width direction of an air flow path. That is, the opening may be opened at the upper center of the air flow path when the air flow control valve is fully closed. In this case, a strong air flow can be generated particularly in the air flow path.

According to invention of Claim 2, an opening part is a recessed part opened by the valve edge located in the fully closed side of the rotation direction of a rotary valve, and is extended from this opening side to a back | inner side edge. is there.
According to the third aspect of the present invention, when the air flow control valve is fully closed, an upward slope is formed at the back edge of the opening toward the channel wall surface on one side in the vertical (height) direction of the casing. By forming an inclined plane so as to be strong, a strong air flow can be generated.
It should be noted that when the air flow control valve is fully closed, the opening cross-sectional area of the opening gradually decreases from the upstream side to the downstream side in the air flow direction at the rear edge of the opening. A flat surface may be formed. Also in this case, a strong air flow can be generated.
In addition, you may employ | adopt the recessed part (notch) opened on the one side of the height direction or the width direction of a casing (air flow path) as an opening part. Moreover, you may employ | adopt the recessed part (notch) opened at the center part of the width direction parallel to the rotating shaft direction of a rotary valve as an opening part.

  According to the invention described in claim 4, the plurality of valve ribs are arranged in parallel to each other. Thereby, since it becomes difficult to spread on both sides in the width direction of the air flow path, the air flow from the opening toward the combustion chamber can be strongly biased to one side of the air flow path (the vertical direction or the width direction). In addition, you may install a some valve rib so that the extended line of the both-sides edge of an opening part may be followed. Further, the plurality of valve ribs may be continuously extended from the fully closed side valve edge located on the fully closed side in the rotational direction of the rotary valve to the fully open side valve edge located on the fully open side in the rotational direction of the rotary valve. good. Further, the plurality of valve ribs include a fully closed valve rib extending from a fully closed valve edge located on the fully closed side in the rotary direction of the rotary valve toward a fully open side in the rotary direction of the rotary valve, and a fully open in the rotary direction of the rotary valve. You may comprise by the fully open side valve rib extended toward the fully closed side of the rotation direction of a rotary valve from the fully open side valve edge located in the side. That is, it may be divided into two or more in the rotational direction of the rotary valve.

According to the fifth aspect of the present invention, the casing is provided with the plurality of ribs so that the casing protrudes from the wall surface of the flow path to which the opening of the rotary valve approaches when the air flow control valve is fully closed. These protrusion ribs are respectively installed corresponding to the plurality of valve ribs, and are extended in the air flow direction in the casing. Thereby, since it becomes difficult to spread on both sides in the width direction of the air flow path, the air flow from the opening toward the combustion chamber can be strongly biased to one side (vertical direction or width direction) of the air flow path.
In addition, you may protrude a some rib rib so that a some valve rib may approach from the flow-path wall surface of a casing. Moreover, you may install a some protrusion rib in the flow-path wall surface of the one side of the up-down direction of a casing.

According to the sixth aspect of the present invention, the casing is provided with the opposed portion that is disposed to be opposed to the surface of the rotary valve with a predetermined gap.
In addition, you may install an opposing part in the outer side of the radial direction of a rotating shaft rather than the rotation action line of a rotary valve. Further, a plurality of valve ribs may be protruded from the surface of the rotary valve so as to approach the facing portion of the casing.
According to the seventh aspect of the present invention, the plurality of fitting grooves for preventing interference with the plurality of valve ribs are provided in the facing portion of the casing. These fitting grooves are provided corresponding to the plurality of valve ribs, respectively. Thereby, it is possible to prevent the facing portion of the casing and the plurality of valve ribs from interfering with each other during the opening / closing operation of the rotary valve, so that it is possible to prevent malfunction of the rotary valve and occurrence of problems such as locking.
In addition, you may provide the groove bottom face curved so that the shape of the top surface of several valve rib might be followed in a some fitting groove.
According to the eighth aspect of the present invention, the rotary valve is provided with the partially cylindrical curved surface portion having a predetermined radius of curvature around the rotation axis.
Note that the plurality of valve ribs may be curved along the surface of the curved surface portion of the rotary valve.

According to the ninth aspect of the present invention, the rotary valve includes a metal main body that is integrally attached to the rotary shaft, and a resin sheathing body that is molded so as to cover the surface of the metal main body. The plurality of valve ribs are formed integrally with the resin sheathing body. Thereby, it becomes easy to install a plurality of valve ribs on the surface of the rotary valve.
In addition, a rectangular or rectangular opening that drifts the air flowing through the air flow path when the rotary valve is fully closed is formed in the central portion in the width direction of the valve edge that is positioned on the fully closed side in the rotation direction of the resin sheathing body. It may be formed. Moreover, you may install a some valve rib so that the both-sides edge of the width direction of the opening part of a resin exterior body may be followed. Further, the plurality of valve ribs may be extended in the rotation direction of the resin sheathing body and protrude from the surface of the rotary valve so as to approach the facing portion. Also, the metal body is coupled to the rotating shaft, and is extended from the coupling portion to the outer side in the radial direction of the rotating shaft. The upstream side in the air flow direction from the rotational operation line (the movement locus of the rotary valve) You may comprise by a valve plate etc. which connect a reverse side edge part with respect to each connection part side of a pair of side plate arrange | positioned on both sides of this air flow path.

FIG. 1 is a front view showing an intake device (intake vortex generator) of an internal combustion engine (Example 1). (A) is the side view which showed the intake device (intake vortex | eddy_current generator) of the internal combustion engine, (b) is AA sectional drawing of FIG. 1 (Example 1). (A), (b) is BB sectional drawing of FIG. 1 (Example 1). (A) is a C direction arrow directional view of FIG.2 (b), (b) is DD sectional drawing of Fig.3 (a) (Example 1). (A)-(c) is explanatory drawing which showed the rotary valve (Example 1). (A) is the front view which showed the intake device (intake vortex | eddy_current generator) of the internal combustion engine, (b) is EE sectional drawing of (a) (Example 2). (A) is the front view which showed the intake device (intake vortex | eddy_current generator) of the internal combustion engine, (b) is FF sectional drawing of (a) (Example 3). (A), (b) is sectional drawing which showed the fluid flow control valve (conventional technique). (A), (c) is the top view and front view which showed the rotary valve of the fluid flow control valve, (b) is GG sectional drawing of (c) (conventional technique).

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
An object of the present invention is to further strengthen the swirl flow generated in the combustion chamber of the internal combustion engine, by installing a plurality of valve ribs along both side edges in the width direction of the opening of the rotary valve. This is achieved by suppressing the air flow spreading from the opening to the outside of the air flow path and causing the air flowing through the air flow path to be strongly drifted (a strong air flow is generated).

[Configuration of Example 1]
FIGS. 1 to 5 show a first embodiment of the present invention. FIGS. 1 to 4 show an intake device (intake vortex generator) of an internal combustion engine. FIG. 5 shows a tumble control valve (TCV). It is the figure which showed this rotary valve.

The intake system for an internal combustion engine of the present embodiment includes a plurality of intake passages that supply intake air (intake) to each cylinder (cylinder) of an internal combustion engine having a plurality of cylinders (in-line four-cylinder engine: hereinafter referred to as an engine). The intake passage structure is arranged in parallel in the cylinder arrangement direction of the engine, and the intake air flowing through the intake passage and the intake port is drifted to the upper center of the intake passage and the intake port so as to be vertically arranged in the combustion chamber of each cylinder of the engine. An intake vortex generator for generating a directional swirl flow (intake vortex flow: hereinafter referred to as a tumble flow) is provided.
An intake vortex generator is installed in an engine room of a vehicle such as an automobile, and opens and closes a plurality of intake passages (independent intake passages) arranged in parallel to generate a tumble flow generated in a combustion chamber for each cylinder of the engine. A plurality of air flow control valves (tumble control valves: hereinafter referred to as TCV) to be adjusted are provided.

  The intake vortex generator is a synthetic resin casing (downstream end of the intake manifold) 1 into which intake air flows from the throttle body or surge tank via the upstream end of the intake manifold, and a TCV valve body. A plurality of rotary valves, a metal pin rod (shaft) 2 that connects these rotary valves so that they can be interlocked, and a synthetic resin mold that is molded so as to partially cover the periphery of the pin rod 2 An actuator 4 having a body (shaft) 3 and an electric motor as a power source and collectively changing the openings (rotation angles) of a plurality of rotary valves, and an engine control unit for controlling the openings of the plurality of rotary valves ( ECU).

The plurality of rotary valves have a U-shaped metal valve main body 5 and a synthetic resin sheathing body 6.
The actuator 4 of this embodiment is mounted on the outer wall of the casing 1. The actuator 4 is supplied with electric power, generates an electric motor (not shown) that drives a plurality of rotary valves (torque), and decelerates the rotation of the electric motor and transmits it to the pin rod 2. It has a mechanism (not shown).
The electric motor that drives the plurality of rotary valves is electrically connected to a battery mounted on a vehicle such as an automobile via a motor drive circuit that is electronically controlled by an ECU.

Here, the engine is a gasoline engine that generates an output by heat energy obtained by burning a mixture of intake air and fuel in a combustion chamber.
The engine includes a cylinder block in which a plurality of cylinders are arranged in series in the cylinder arrangement direction, and a cylinder head having a plurality of intake ports and a plurality of exhaust ports.
Four combustion chambers are formed in the cylinder block of the engine in the cylinder arrangement direction. A piston connected to the crankshaft is supported in a cylinder bore formed in each cylinder of the cylinder block via a connecting rod so as to be slidable in the sliding direction.

The engine cylinder head has an intake pipe (intake duct) for introducing intake air into the combustion chamber of each cylinder of the engine, and exhaust gas flowing out from the combustion chamber of each cylinder of the engine through an exhaust purification device. And an exhaust pipe (exhaust duct) for discharging to the outside.
The cylinder head of the engine has a coupling end surface (fastening surface) for fastening and fixing the coupling flange 7 of the casing 1 using fastening bolts. Further, a spark plug is attached to the cylinder head so that the tip end portion is exposed in the combustion chamber of each cylinder. The cylinder head is provided with an injector (electromagnetic fuel injection valve) that injects fuel into each intake port at an optimal timing.
The intake port for each cylinder of the engine is opened and closed by an intake valve. The exhaust port for each cylinder of the engine is opened and closed by an exhaust valve.

The casing 1 of the present embodiment is composed of a plurality of parts, and includes a surge tank integrated with a surge tank that includes a surge tank that reduces pressure pulsation of intake air and a plurality of intake branch pipes that are connected to a plurality of outlets of the surge tank. It constitutes the downstream end of the manifold. The plurality of parts are all made of synthetic resin.
Inside the casing 1 are formed air passages 8 and 9 that communicate with the intake ports of the cylinders of the engine and supply intake air to the combustion chambers of the cylinders of the engine.
The plurality of air passages 8 constitute a first intake passage for introducing the intake air flowing from the surge tank into the air passage 9.
The plurality of air passages 9 constitute a second intake passage (intake manifold passage) that blows out the intake air flowing out from the air passage 8 to the intake port of each cylinder of the engine.
A relay channel having a circular arc cross section is formed between the outlet of each air channel 8 and the inlet of each air channel 9. The relay flow path is provided along a rotation operation line (movement locus of the rotary valve) that is a curve with a predetermined radius of curvature centering on the rotation center (rotation axis) of the pin rod 2.

The plurality of air flow paths 8 are air flow paths (intake manifold paths) on the upstream side in the air flow (intake flow) direction from the rotational operation line of each rotary valve.
The plurality of air flow paths 9 are air flow paths (intake manifold paths) on the downstream side in the intake flow direction with respect to the rotational operation lines of the rotary valves.
The casing 1 is composed of a synthetic resin block that divides adjacent two air flow paths 8 and 9 individually and surrounds each air flow path 8 and 9 in a mouth shape. The casing 1 has a pair of flow path walls (left and right wall portions) 11 and 12 on both sides in the width (lateral) direction of the air flow paths 8 and 9, and the upper and lower (high) of the air flow paths 8 and 9. A pair of flow path walls (upper and lower wall portions) 13 and 14 on both sides in the direction.
Details of the casing 1 will be described later.

The plurality of TCVs are U-shaped (branch type) rotary valves accommodated in the casing 1 so as to be freely opened and closed (rotatable), a pin rod 2 extending in the rotation axis direction of the rotary valve, and the pin rod 2 It is constituted by a plurality of synthetic resin molds 3 or the like partially covering the periphery.
The rotary valve constitutes a TCV valve body, and is arranged in parallel in the casing 1 at a predetermined interval in the rotation axis direction of the pin rod 2.
Details of the rotary valve will be described later.

The pin rod 2 is a rotating shaft extending in a direction orthogonal to the intake air flow direction in the air flow paths 8 and 9 of the casing 1, and is arranged in the arrangement direction of the plurality of air flow paths 8 and 9 (in the cylinder arrangement direction of the engine). (In parallel to the parallel direction), it is arranged so as to extend straight in the direction of the rotation axis. The pin rod 2 is a polygonal cross-section shaft (square steel shaft, metal shaft: square bar) whose cross section perpendicular to the rotation axis direction is formed in a polygonal shape (for example, a square shape), and is integrally formed by a metal material. Is formed.
One end portion of the pin rod 2 in the rotation axis direction protrudes from one end surface of the casing 1 to the outside and is connected to the actuator 4. Further, the other end portion of the pin rod 2 in the rotation axis direction protrudes to the outside from the other end surface of the synthetic resin molded body 3 and is rotatably supported by a bearing (not shown) press-fitted and fixed to the casing 1. ing. In addition, the other end part of the rotating shaft direction of the pin rod 2 is cut so that a cross section may become circular shape.

The pin rod 2 connects a plurality of rotary valves via a synthetic resin molded body 3 so that they can be interlocked. As a result, the opening degree of the plurality of rotary valves (TCV opening degree) can be collectively changed by one pin rod 2.
The synthetic resin mold molded body 3 is a cylindrical resin member (synthetic resin resin molded portion) that is installed corresponding to each of the plurality of rotary valves and is formed so as to surround the periphery of the pin rod 2 in the circumferential direction. is there. The synthetic resin molded body 3 has a valve holding portion that couples (supports and fixes) a plurality of rotary valves.

  Next, details of the rotary valve of the present embodiment will be briefly described with reference to FIGS. The plurality of rotary valves are accommodated in the inner space of the casing 1 so as to be rotatable (swingable), and are on a rotational operation line that is a curve with a predetermined radius of curvature (arc curve) around the rotation axis of the pin rod 2. Is a swing-type tumble control valve that adjusts the tumble flow generated in the combustion chamber of each cylinder of the engine by reciprocating (opening and closing operation).

The plurality of rotary valves are fully opened using the torque of the actuator 4, particularly the electric motor. The plurality of rotary valves are fully closed using the torque of the actuator 4, particularly the electric motor. That is, the rotation angle of the plurality of rotary valves is changed in the fully movable range from the fully open position to the fully closed position using the torque of the electric motor.
When the plurality of rotary valves are fully opened, the air passages 8 and 9 are opened to be stored in the valve storage recess 17 (stored state).

The plurality of rotary valves are configured by a U-shaped metal valve body 5 and a synthetic resin sheathing body 6 molded so as to cover the front and back surfaces of the metal valve body 5.
The metal valve body 5 is integrally formed in a predetermined shape with a metal material. The metal valve main body 5 includes a pair of side plates 21 and 22 having a pair of coupling portions 15 and 16 coupled to the pin rod 2 through the synthetic resin molded body 3, and coupling of the side plates 21 and 22. It has the valve plate 23 which connects opposite side edge parts with respect to the part side.

The two coupling portions 15 and 16 are metal ring plates that surround the pin rod 2 and the synthetic resin mold molded body 3, and are supported and fixed to each valve holding portion of the synthetic resin mold molded body 3 by insert molding. Yes. Each coupling portion 15, 16 is formed with a fitting hole into which the synthetic resin mold body 3 is fitted. The two coupling portions 15 and 16 are integrally formed on the pin rod 2 side of the pair of side plates 21 and 22.
The pair of side plates 21, 22 extend straight from the two coupling portions 15, 16 toward the radially outward side (free end portion side, tip end side) of the pin rod 2. These side plates 21 and 22 are formed by bending both ends of the valve plate 23 in the rotational axis direction (axial direction parallel to the pin rod 2) to the pin rod side (coupling portion side) at substantially right angles. In addition, the pair of side plates 21 and 22 have outer surfaces that are arranged to face each other with a predetermined gap (side clearance) between the inner surfaces (opposing wall surfaces) of the left and right wall portions 11 and 12 of the casing 1. Each has.

  The valve plate 23 is a connecting portion that connects the free ends of the pair of side plates 21 and 22 (ends opposite to the pin rod side). The valve plate 23 reciprocates in the rotation direction around the rotation axis of the pin rod 2 to change the opening area of the air flow paths 8 and 9. The valve plate 23 is provided with a partially cylindrical curved surface portion having a predetermined radius of curvature around the rotation axis (rotation center axis) of the pin rod 2.

The synthetic resin outer package 6 is integrally formed in a predetermined shape with a synthetic resin. This synthetic resin sheathing body 6 is installed for each of a plurality of rotary valves, and is an arc-shaped resin mold member (synthetic resin resin molding portion) molded so as to cover the front and back surfaces of each valve plate 23. It is. Inside the synthetic resin sheathing 6, the valve plate 23 side ends of the side plates 21 and 22 of the rotary valve and the entire valve plate 23 are insert-molded.
The synthetic resin outer package 6 is provided with a partially cylindrical curved surface portion 24 having a predetermined radius of curvature around the rotation axis (rotation center axis) of the pin rod 2. The curved surface portion 24 of the synthetic resin sheathing body 6 is connected to the relay plate (circular circle) formed between the air channel 8 and the air channel 9 together with the valve plate 23 of the metal valve body 5 when the rotary valve is opened and closed. It reciprocates in the direction of rotation in the arcuate space.

The curved surface portion 24 extends from the fully closed side edge of the valve plate 23 of the metal valve body 5 to the fully closed side in the rotational direction (side approaching the upper wall portion 13 of the casing 1). Further, the curved surface portion 24 is extended from the fully open side edge of the valve plate 23 of the metal valve body 5 to the fully open side in the rotational direction (side approaching the lower wall portion 14 of the casing 1).
Further, the surface of the curved surface portion 24, that is, the outer wall surface in the bending direction of the curved surface portion 24 is a convex curved surface that is convex outward in the radial direction of the rotation axis of the pin rod 2.
Further, the back surface of the curved surface portion 24, that is, the inner wall surface in the bending direction of the curved surface portion 24 is a concave curved surface that is concave toward the radially outer side of the rotation axis of the pin rod 2.

In addition, the synthetic resin sheathing body 6 has intake air flowing through the air flow paths 8 and 9 when the rotary valve is fully closed, on one side in the vertical (height) direction of the air flow path 9 (on the upper wall 13 side of the casing 1). A rectangular opening 25 for generating a tumble flow in the combustion chamber is formed.
In addition, on the far side (bottom side) in the depth direction of the opening 25 of the synthetic resin outer package 6, a far side edge (the far side edge of the opening 25) is provided. Further, both side edges (both side edges of the opening 25) are provided on both sides in the width direction of the opening 25 of the synthetic resin exterior body 6.
The opening 25 is an opening recess that extends from the opening side to the back edge by cutting out the central portion in the width direction of each valve edge located on the fully closed side in the rotational direction of the plurality of rotary valves. is there. Thereby, the front shape of the synthetic resin exterior body 6 becomes a concave shape.
Further, the opening 25 opens near the channel wall surface on one side (upper wall 13 side) in the vertical direction of the casing 1 when the rotary valve is fully closed. The opening 25 opens at the center in the width direction of the air flow paths 8 and 9. That is, the opening 25 opens at the upper center of the air flow paths 8 and 9 when the rotary valve is fully closed.

A flat surface (flat surface) 26 is formed at the rear edge of the opening 25 so as to be inclined upward toward the upper wall 13 of the casing 1 when the rotary valve is fully closed. The flat surface 26 at the back edge of the opening 25 is the opening of the opening 25 from the upstream side to the downstream side in the intake air flow direction in the air flow paths 8 and 9 (opening 25) when the rotary valve is fully closed. It is inclined so that the cross-sectional area gradually decreases. As a result, the intake air flow that flows along the flat surface 26 of the back edge of the opening 25 and blows into the air flow path 9, as shown in FIG. It flows along the flow path wall surface at the center in the width direction, and goes to the intake port.
Note that the smaller the opening cross-sectional area of the opening 25, the stronger the tumble flow generated in the combustion chamber. Further, a concave curved surface may be formed at the back edge of the opening 25 instead of the flat surface 26.

The synthetic resin sheathing body 6 includes a plurality of (a pair of) a pair of side edges in the width direction of the opening 25 and a line extending along the arc direction of the curved surface portion 24 (a fully open side in the rotational direction of the rotary valve). ) Valve ribs 31 and 32 are provided. The pair of valve ribs 31 and 32 are arranged in parallel with each other with the opening 25 of the synthetic resin sheathing body 6 and the center of the surface of the curved surface portion 24 of the synthetic resin sheathing body 6 interposed therebetween.
The pair of valve ribs 31 and 32 protrude from the convex curved surface of the curved surface portion 24 of the synthetic resin sheathing body 6 so as to approach an opposing portion (described later) of the lower wall portion 14. The pair of valve ribs 31 and 32 are formed to be curved in an arc shape so as to follow the outer wall surface (convex curved surface) shape of the curved surface portion 24 of the synthetic resin sheathing body 6 in the bending direction. Further, the pair of valve ribs 31 and 32 protrudes from the convex curved surface of the curved surface portion 24 of each synthetic resin sheathing body 6 of the plurality of rotary valves toward the radially outer side of the rotation axis of the pin rod 2 and the downstream side in the intake air flow direction. It is installed to do.

The valve rib 31 is installed along the left edge in the width direction of the opening 25 and the extension line thereof, and from each valve edge (fully closed valve edge) positioned on the fully closed side in the rotational direction of the rotary valve to the rotary valve. Are first valve side ribs (left ribs on the left side of the opening) continuously extending in the rotation direction of the rotary valve until reaching each valve edge (fully opened side valve edge) located on the fully open side in the rotation direction.
The valve rib 32 is installed along the right edge in the width direction of the opening 25 and the extension line thereof, and continuously from the fully closed valve edge of the rotary valve to the fully opened valve edge of the rotary valve. It is the 2nd valve | bulb side rib (right ridge rib of an opening part) extended in a rotation direction.

Next, details of the casing 1 of the present embodiment will be briefly described with reference to FIGS.
The casing 1 is a pair of left and right wall portions (flow channel walls) 11 and 12 that are disposed to face each other with the air flow paths 8 and 9 therebetween, and a pair that is disposed to face each other with the air flow paths 8 and 9 interposed therebetween. Upper and lower wall portions (flow channel walls) 13 and 14.
A space 33 having a semicircular cross section is formed in a corner portion between the channel wall surface of the left wall portion 11 and the channel wall surface of the lower wall portion 14. A space 34 having a semicircular cross section is formed at a corner portion between the channel wall surface of the right wall portion 12 and the channel wall surface of the lower wall portion 14.
As shown in FIG. 3, the upper wall portion 13 has a protruding wall 35 that protrudes downward from the flow path wall surface of the air flow path 9 so as to approach the pair of valve ribs 31 and 32. A step surface 36 is formed between the upper wall portion 13 and the protruding wall 35. The stepped surface 36 of the protruding wall 35 follows the outer wall surface (convex curved surface) shape of the curved surface portion 24 of each synthetic resin sheathing body 6 in order to prevent interference with the rib top portions of the pair of valve ribs 31 and 32. As shown in FIG.

The lower wall portion 14 is installed on the lower side in the vertical direction of the air flow path 9 than the thin wall portion 37 installed on the lower side in the vertical direction of the air flow path 8. A thick portion 38 for narrowing the opening cross-sectional area of the air flow path 9 is provided. The valve housing recess 17 is provided across the thin portion 37 and the thick portion 38 connected thereto.
The thin-walled portion 37 and the thick-walled portion 38 are opposed portions (curved portions) disposed to face each other with a predetermined gap between the curved surface portion 24 of the synthetic resin sheathing body 6 of the plurality of rotary valves. , And a flat portion that is flat from the end of the facing portion to the inlet of the air flow path 8. The facing portion is installed on the outer side of the rotational axis of the pin rod 2 in the radial direction with respect to the rotary operation line of the rotary valve. The facing portion has bottom surfaces (bottom surfaces of the lower wall portion 14) 41 to 43 that are curved so as to follow the convex curved surface shape of the curved surface portion 24 of each synthetic resin sheathing body 6.

A plurality (a pair) of fittings are provided on the bottom surfaces 41 to 43 of the thin wall portion 37 and the thick wall portion 38 from the inlet portion of the air flow path 8 to the inlet portion (ridge line, edge E) of the air flow path 9. Grooves 44 and 45 are formed. The fitting grooves 44 and 45 are formed with groove bottom surfaces (concave curved surfaces) curved so as to follow the convex curved surface shape of the curved surface portion 24 of the synthetic resin sheathing body 6.
The pair of fitting grooves 44, 45 are located between the bottom surfaces of the grooves facing each other with a predetermined first gap A between the top surfaces of the pair of valve ribs 31, 32 and the side surfaces of the pair of valve ribs 31, 32. It has groove side surfaces that face each other with a predetermined second gap B therebetween.

[Operation of Example 1]
Next, a method for controlling the valve opening of the TCV according to this embodiment will be briefly described with reference to FIGS.

The ECU is a “tumble execution area” in which the tumble flow in the combustion chamber needs to be strengthened based on the engine operating status, for example, the engine speed (engine speed) and the engine load (accelerator opening or throttle opening). Or whether the tumble flow in the combustion chamber does not need to be strengthened.
The required tumble ratio is obtained based on the engine operating condition, for example, the engine rotation speed and the engine load. When the required tumble ratio is a predetermined value or more, the rotary valves of the plurality of TCVs are fully closed, and the required tumble ratio is predetermined. The rotary valves of a plurality of TCVs may be fully opened when less than the value,

When the ECU determines that it is the “tumble execution area”, the power supplied to the electric motor is controlled (for example, the electric motor is energized). At this time, since the plurality of rotary valves are driven in the valve closing operation direction using the motor torque, the rotary valves of the TCV are closed. That is, the synthetic resin sheathing bodies 6 of the plurality of rotary valves are opened and closed so as to be in the fully closed position (fully closed state) as shown in FIGS. 1, 2 (b), 3 (a), and 4. Control (fully closed control). At this time, the flow path opening cross-sectional area of each air flow path 8 and 9 becomes the minimum.
In this case, the intake air flow that flows from the upstream end portion of the intake manifold into the downstream end portion (the air flow path 8 of the casing 1) flows along the concave curved surface of the curved surface portion 24 of the synthetic resin exterior body 6. Then, each of the synthetic resin sheathing bodies 6 of the plurality of rotary valves flows into the opening 25 opened at the center in the width direction of the valve edge of the synthetic resin sheathing body 6.

Then, the intake air flow that has flowed into the opening 25 flows along the plane 26 at the back edge of the opening 25 and blows into the air flow path 9, and as shown in FIG. It becomes the drift which flows so that the flow-path wall surface of the center part of the width direction of the wall part 13 may be followed.
The drift flowing through the upper wall portion 13 of the air flow path 9 is introduced into the upper layer portion of the intake port of the cylinder head from the upper wall portion 13 side of the outlet portion of the air flow path 9, and flows in the upper layer portion of the intake port. It flows along the road wall.
And the intake flow which flows along the flow path wall surface of the upper part of the intake port is supplied into the combustion chamber from the intake port opening. At this time, since a tumble flow is generated in the combustion chamber for each cylinder of the engine, the combustion efficiency in the combustion chamber at the time of engine start or idling operation is improved, and fuel consumption and emission (for example, HC reduction effect) are improved. The

On the other hand, when the ECU determines that it is the “tumble non-execution region”, it controls the power supplied to the electric motor (for example, energizes the electric motor). At this time, since the plurality of rotary valves are driven in the valve opening operation direction using the motor torque, the plurality of TCV rotary valves are opened. In other words, as shown in FIG. 3B, the synthetic resin sheathing body 6 opens the air flow path 9 and is stored in the valve storage recess 17 of the lower wall portion 14 of the casing 1 (storage state, Open / close control (full open control) is performed so as to be in the fully open state. At this time, the flow path opening cross-sectional area of each air flow path 8 and 9 becomes the maximum.
In this case, the intake flow that has flowed from the upstream end of the intake manifold into the downstream end (the air flow path 8 of the casing 1) passes straight through the relay flow path and the air flow path 9 and flows into the air flow. It is introduced into the intake port from the outlet of the passage 9. The intake air flow that has passed through the intake port is supplied into the combustion chamber from the intake port opening. At this time, no tumble flow is generated in the combustion chamber.

[Effect of Example 1]
As described above, in the intake vortex generator having a plurality of tumble control valves (TCV) of the present embodiment, the combustion for each cylinder of the engine is performed by opening and closing the rotary valves of the plurality of TCVs on the rotation operating line. For the purpose of further strengthening the tumble flow generated in the room, a pair of valve ribs 31 and 32 are provided on the surface (convex curved surface) of the curved surface portion 24 of each synthetic resin sheathing body 6 of the plurality of rotary valves.
These valve ribs 31 and 32 cut the center part in the width direction of each valve edge located on the fully closed side in the rotational direction of the plurality of rotary valves, that is, the upper center of each synthetic resin sheathing body 6 of the plurality of rotary valves. The openings 25 are opened along the edges, that is, along the edges on both sides of the openings 25 that generate a strong drift in the upper center of the air flow path 9 and the extended lines.

  The pair of valve ribs 31 and 32 are continuously extended in the rotational direction of the rotary valve from the fully closed side valve edge to the fully open side valve edge of each synthetic resin sheathing body 6 of the plurality of rotary valves. Further, the pair of valve ribs 31, 32 is arranged so as to approach the groove bottom surfaces of the pair of fitting grooves 44, 45 of the lower wall portion 14 from the convex curved surface of the curved surface portion 24 of each synthetic resin sheathing body 6 of the plurality of rotary valves. It protrudes. The pair of valve ribs 31 and 32 are formed to be curved in an arc shape so as to follow the convex curved surface shape of the curved surface portion 24 of each synthetic resin sheathing body 6 of the plurality of rotary valves. The pair of valve ribs 31 and 32 are installed so as to protrude from the convex curved surface of the curved surface portion 24 of each synthetic resin sheathing body 6 of the plurality of rotary valves toward the outside in the radial direction of the rotation axis of the pin rod 2. .

With the above-described valve rib structure, when the rotary valve is fully closed, the intake air flow that has flowed into the air flow path 9 from the opening 25 opened at the upper center of each synthetic resin sheathing body 6 of the plurality of rotary valves is A pair of valve ribs 31 are provided so as to protrude from the convex curved surface of the curved surface portion 24 of each synthetic resin sheathing body 6 of the plurality of rotary valves toward the downstream side in the intake air flow direction along the edge and the extension line. , 32 is rectified (obstructed).
Thereby, when the rotary valve is fully closed, the intake air flow that has flowed out of the opening 25 into the air flow path 9 is less likely to bend in an arc shape outward in the width direction than both side edges of the opening 25. That is, since the intake air flow is difficult to spread, the intake air flow that passes through the opening 25 can be strongly biased to the upper center of the air flow path 9. That is, a strong intake flow can be generated.
As a result, by suppressing the intake air flow that spreads from the opening 25 to both sides (sides) in the width direction of the air flow path 9, it is possible to generate a strong intake flow at the upper center of the air flow path 9. It is possible to further strengthen the tumble flow generated in the combustion chamber of each cylinder. Therefore, it is possible to improve the combustion efficiency of the engine and improve the fuel consumption by stabilizing the combustion.
The pair of valve ribs 31 and 32 are integrally formed on the convex curved surface of the curved surface portion 24 of the synthetic resin sheathing body 6. Thereby, since it becomes easy to install a pair of valve ribs 31 and 32 on the surface of a rotary valve, cost can be reduced.

Here, in the plurality of TCVs of the present embodiment, the curved bottom surface of the pair of fitting grooves 44 and 45 of the lower wall portion 14 of the casing 1 is approached from the curved surface portion 24 of each synthetic resin sheathing body 6 of the plurality of rotary valves. A predetermined first gap A is provided between the top surfaces of the pair of valve ribs 31 and 32 and the bottom surfaces of the pair of fitting grooves 44 and 45 so as to project. A predetermined second gap B is provided between the side surfaces of the pair of valve ribs 31 and 32 and the groove side surfaces of the pair of fitting grooves 44 and 45.
The first and second gaps A and B are provided to prevent interference between the lower wall portion 14 of the casing 1 and the rib top portions of the pair of valve ribs 31 and 32. In addition, a labyrinth structure (a labyrinth structure with a long passage length) is formed by the first and second gaps A and B. Therefore, when the TCV is fully closed, the outer side in the width direction (below the lower side plates 21 and 22). The intake air flow that flows out to the bottom surface 41, 43 near both sides in the width direction of the wall portion 14 flows into the air flow path 9 side from the spaces 33, 34 provided on both sides in the width direction of the air flow path 8. Can be prevented.

  FIG. 6 shows a second embodiment of the present invention, and is a view showing an intake device (intake vortex generator) of an internal combustion engine.

The TCV of the present embodiment has four valve ribs 51 to 54 on the surface of the rotary valve, that is, the surface (convex curved surface) of the curved surface portion 24 of the synthetic resin sheathing 6.
The valve rib 51 is installed along the left edge of the opening 25, and extends in the rotational direction of the rotary valve from the fully closed valve edge of the rotary valve to the vicinity of the back edge of the opening 25 (opening). Left side ribs).
The valve rib 52 is installed along the right edge of the opening 25 and extends in the rotational direction of the rotary valve from the fully closed valve edge of the rotary valve to the vicinity of the back edge of the opening 25 (opening). Right ridge rib).

The valve rib 53 is installed along the extension line of the left edge of the opening 25, and extends from the fully open valve edge of the rotary valve toward the left edge of the opening 25 in the rotational direction of the rotary valve. (Left ridge rib).
The valve rib 54 is installed along the extension line of the right edge of the opening 25, and extends from the fully open valve edge of the rotary valve toward the right edge of the opening 25 in the rotational direction of the rotary valve. (Right ridge rib).
That is, the valve ribs 51 to 54 may not be provided continuously from the fully closed valve edge to the fully opened valve edge of the surface of the rotary valve, that is, the surface (convex curved surface) of the curved surface portion 24 of the synthetic resin sheathing body 6. .

The two valve ribs 51 and 52 make the intake flow that flows out to the inlet portion of the air flow path 9 difficult to bend in an arc shape outward in the width direction from both side edges of the opening portion 25, that is, difficult to spread. The intake air flow passing through the portion 25 can be strongly biased to the upper center (one side center) of the air flow path 9. As a result, a strong intake air flow can be generated in the upper center of the air flow path 9, so that it is possible to further strengthen the tumble flow generated in the combustion chamber of each cylinder of the engine.
The two valve ribs 53 and 54 are configured so that the intake air flow that flows out to the lower side in the vertical direction (regions near the bottom surfaces 41 and 43 on both sides in the width direction of the lower wall portion 14) from the rotary valve when the TCV is fully closed. Prevents inflow to 9 side.
As described above, the effect similar to that of the first embodiment can be achieved in the intake device (intake vortex generator) of the internal combustion engine of the present embodiment, particularly the TCV.

  FIG. 7 shows a third embodiment of the present invention, and is a view showing an intake device (intake vortex generator) of an internal combustion engine.

The TCV of this embodiment has a pair of valve ribs 31 and 32 on the surface of the rotary valve, that is, on the surface (convex curved surface) of the curved surface portion 24 of the synthetic resin sheathing body 6. In addition, a pair of protruding ribs 61 and 62 are installed on the flow path wall surface of the upper wall portion 13 of the casing 1. These ribs 61 and 62 are intake manifold side ribs installed along the pair of valve ribs 31 and 32. The pair of projecting ribs 61 and 62 protrudes downward in the drawing so as to approach the top surfaces of the pair of valve ribs 31 and 32 from the flow path wall surface of the upper wall portion 13 of the casing 1.
Even when provided in this way, the same effects as in the first and second embodiments can be achieved.

[Modification]
In this embodiment, the present invention allows the rotary valve having an opening portion to be fully closed by cutting out the central portion (upper center) in the width direction of each valve edge located on the fully closed side in the rotational direction. Provided with a tumble control valve (TCV) that causes intake air (intake air) supplied to the combustion chamber of the internal combustion engine (engine) to drift to the upper side of the air flow path to generate a vertical swirling flow (tumble flow) in the combustion chamber. The present invention is applied to an intake vortex generator, but the present invention applies intake air (intake) that is supplied to an engine combustion chamber by fully closing a rotary valve having an opening formed by cutting out one side center in the width direction. The air vortex generator may be applied to an intake vortex generator having a swirl control valve (SCV) that generates a swirl flow (swirl flow) in the combustion chamber by drifting to the one side in the width direction of the air flow path.
Moreover, you may comprise this invention so that the production | generation of the squish vortex for promoting combustion of an engine is attained.

In this embodiment, the actuator that opens and closes the rotary valve that is the valve body of the tumble control valve (TCV) is configured by an electric actuator. However, the actuator that opens and closes the rotary valve can be an electromagnetic or electric negative pressure control valve. It may be constituted by a negative pressure actuated actuator provided with an electromagnetic actuator or an electromagnetic actuator.
A diesel engine may be used as the internal combustion engine. Further, as the internal combustion engine, not only a multi-cylinder engine but also a single-cylinder engine may be used.
Further, the pair of valve ribs 31 and 32 and the four valve ribs 51 to 54 may be integrally formed on the surface of the rotary valve, that is, the surface of the valve plate 23 of the metal valve body 5. In this case, the synthetic resin outer package 6 need not be provided.

1 Casing (intake manifold)
2 Pin rod (shaft)
3 Synthetic resin mold (shaft)
4 Actuator 5 Metal valve body (TCV valve body of TCV)
6 Synthetic resin exterior body (valve body of the rotary valve which is the valve body of TCV)
8 Air flow path (first air intake passage, upstream air flow path in the air flow direction from the rotation operation line)
9 Air flow path (second air intake path, air flow path on the downstream side in the air flow direction from the rotation operation line)
11 The left wall of the casing (channel wall)
12 Right wall of the casing (channel wall)
13 Upper wall of the casing (channel wall)
14 Lower wall of casing (channel wall)
DESCRIPTION OF SYMBOLS 15 Joint part of rotary valve 16 Joint part of rotary valve 21 Side plate of rotary valve 22 Side plate of rotary valve 23 Valve plate of rotary valve 24 Curved surface part of synthetic resin exterior body of rotary valve 25 Synthetic resin exterior body of rotary valve Opening 26 Flat surface of the back edge of the opening (flat surface)
31 Valve rib (left rib of opening)
32 Valve rib (Right rib rib on the opening)
44 Fitting groove 45 Fitting groove 51 Valve rib (left protrusion rib on the opening)
52 Valve rib (Right-side rib on opening)
53 Valve rib (left rib)
54 Valve rib (right rib rib)
61 ridge rib 62 ridge rib

Claims (9)

(A) a casing forming an air flow path for supplying air to the combustion chamber of the internal combustion engine;
(B) a rotary shaft extending in a direction orthogonal to the air flow direction in the casing, and a rotary valve that reciprocally moves on a rotational operation line that is a curve of a predetermined radius of curvature around the rotary shaft;
In an internal combustion engine intake device comprising an air flow control valve that adjusts a swirling flow generated in the combustion chamber by an opening and closing operation,
The rotary valve is installed along an opening for drifting the air flowing through the air flow path when the air flow control valve is fully closed, and both side edges in the width direction of the opening, and the rotary valve rotates. Having a plurality of valve ribs extending in the direction,
The plurality of valve ribs are installed so as to protrude from the surface of the rotary valve toward the downstream side in the air flow direction in the casing or the outer side in the radial direction of the rotary shaft. Intake device. The intake device for an internal combustion engine according to claim 1,
The opening is a recess that opens at a valve edge located on the fully closed side in the rotational direction of the rotary valve and extends from the opening to the back edge. Intake device. The intake device for an internal combustion engine according to claim 2,
The back edge of the opening is formed with a plane that is inclined so as to rise upward toward the channel wall surface on one side in the vertical direction of the casing when the air flow control valve is fully closed. An intake device for an internal combustion engine characterized by the above.   The intake device for an internal combustion engine according to any one of claims 1 to 3, wherein the plurality of valve ribs are arranged in parallel to each other. The intake device for an internal combustion engine according to any one of claims 1 to 4, wherein the casing protrudes from a wall surface of the flow path to which the opening approaches when the air flow control valve is fully closed. A plurality of ribs extending in the direction of air flow in the casing,
The intake device for an internal combustion engine, wherein the plurality of protruding ribs are respectively installed corresponding to the plurality of valve ribs.   The intake device for an internal combustion engine according to any one of claims 1 to 5, wherein the casing is disposed so as to be opposed to the surface of the rotary valve with a predetermined gap therebetween. An intake device for an internal combustion engine, characterized by comprising a portion. The intake device for an internal combustion engine according to claim 6,
The facing portion has a plurality of fitting grooves for preventing interference with the plurality of valve ribs,
The intake system for an internal combustion engine, wherein the plurality of fitting grooves are respectively installed corresponding to the plurality of valve ribs.   The intake device for an internal combustion engine according to any one of claims 1 to 7, wherein the rotary valve has a partially cylindrical curved surface portion having a predetermined radius of curvature around the rotation axis. An intake device for an internal combustion engine, characterized by being provided. The intake device for an internal combustion engine according to any one of claims 1 to 8, wherein the rotary valve covers a metal main body integrally attached to the rotary shaft and a surface of the metal main body. Having a resin outer body molded into
The intake device for an internal combustion engine, wherein the plurality of valve ribs are formed integrally with the resin sheathing body.

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