JP6303541B2 - Intake structure and intake device for internal combustion engine - Google Patents

Description

  The present invention relates to an intake structure and an intake device for an internal combustion engine.

  As a conventional general internal combustion engine intake structure, a vertical vortex (tumble flow) and a horizontal vortex (swirl flow) are created in the combustion chamber by arranging an air flow control valve in the intake passage through which fluid consisting mainly of air flows. An intake structure for an internal combustion engine that improves the combustion efficiency of the internal combustion engine is known. In this intake structure, by adjusting the flow passage cross-sectional area of the intake passage by the air flow control valve, the flow of fluid in the intake passage is controlled, and a vertical vortex (tumble flow) and a horizontal vortex (swirl flow) are created. It is configured as follows.

  In the conventional intake structure as described above, since the air flow control valve is arranged in the intake passage, the flow of fluid is deteriorated (the ventilation resistance (pressure loss) is increased). In order to suppress an increase in resistance, the intake passage is provided with a storage portion in which the airflow control valve is stored. However, due to the provision of the accommodating portion in the intake passage, the stagnant composed of oil, fuel, moisture, etc. contained in the fluid stays in the accommodating portion. If a large amount of the accumulated matter accumulates in the storage portion, the accumulated accumulated matter hinders the rotation of the airflow control valve, and as a result, the airflow control valve cannot sufficiently control the flow of the fluid.

  Therefore, conventionally, an intake structure for an internal combustion engine has been proposed that is configured to allow the accumulated matter in the housing portion to flow downstream of the fluid flow in the intake passage (see, for example, Patent Document 1).

  Patent Document 1 discloses an intake structure of an internal combustion engine that includes an engine and an intake manifold for supplying air to a combustion chamber of the engine, and an intake passage is formed by the engine and the intake manifold. In the intake passage of this intake structure, a valve body (airflow control valve) that controls the flow of air by rotating around a rotation shaft and a valve body that is formed below the inner wall that defines the intake passage are accommodated. And a groove formed on the inner wall so as to extend from the recess to the downstream side of the intake passage. In the intake structure of the internal combustion engine described in Patent Document 1 above, in a mode (open state) where the flow of air is not restricted by the valve body, the accumulated matter staying in the recess is downstream via the groove due to the negative pressure generated in the recess. It is configured to be sucked out to the side.

JP 2008-57525 A

  However, in the intake structure of the internal combustion engine described in Patent Document 1, a groove portion is formed on the inner wall that defines the intake passage in order to suppress the retention of the accumulated matter that has accumulated in the recess (the accommodating portion in which the valve element is accommodated). Since it is formed, the air flow in the intake passage is disturbed in the groove portion, resulting in a disadvantage that the ventilation resistance (pressure loss) in the intake passage is increased. In particular, when the valve body is opened to increase the amount of air flow, the momentum of the intake air is attenuated due to the large ventilation resistance in the intake passage. There is a problem that the fuel consumption is deteriorated.

  This invention is made in order to solve the above problems, and one object of this invention is to suppress accumulation of accumulated matter in a housing part in which an airflow control valve is housed. An object of the present invention is to provide an intake structure and an intake device for an internal combustion engine capable of suppressing deterioration in fuel consumption of the internal combustion engine by suppressing an increase in ventilation resistance (pressure loss) in the intake passage.

In order to achieve the above object, an intake structure for an internal combustion engine according to a first aspect of the present invention is provided in an intake passage that is communicated with a combustion chamber of the internal combustion engine and through which a fluid supplied to the combustion chamber flows, The airflow control valve that controls the flow of fluid by rotating around the rotation axis and the intake passage are provided separately, and flow downstream from the rotation shaft of the housing portion in which the airflow control valve of the intake passage is accommodated. And a stagnant material escape hole for allowing the stagnant material in the accommodating portion to flow downstream of the fluid flow in the intake passage, and the intake passage includes a first intake passage in the main body of the intake device having the accommodating portion. The second intake passage of the cylinder head that constitutes the combustion chamber of the internal combustion engine, and the third intake passage of the interposition member provided between the intake device body and the cylinder head, In the interposition member The first staying material escape hole is provided separately from the intake passage, and is provided in the housing portion, and is directed downward toward the first staying material escape hole so as to guide the staying material in the housing portion to the first staying material escape hole. A sloping portion that is inclined to the upper portion, the upper portion of the first stagnant relief hole is in communication with the housing portion, and the lower portion of the first stagnant relief hole is lower than the bottommost portion of the sloping portion. A step portion is provided so as to be positioned below .

In the intake structure for the internal combustion engine according to the first aspect of the present invention, as described above, the inlet is provided downstream of the rotation shaft of the housing portion in which the airflow control valve of the intake passage is housed, separately from the intake passage. At the same time, a stagnant relief hole is provided to allow the stagnant in the accommodating portion to flow downstream of the fluid flow in the intake passage. As a result, unlike the case where the intake passage itself is provided with a structure (such as a groove) for allowing the accumulated matter to flow downstream, the accumulated matter relief hole is provided separately from the intake passage. It is possible to suppress the fluid flow in the intake passage from being disturbed by the holes. As a result, it is possible to suppress an increase in ventilation resistance (pressure loss) in the intake passage, and thus it is possible to suppress deterioration in fuel consumption of the internal combustion engine. Further, the accumulated matter in the accommodating portion moves from the upstream side to the downstream side due to the flow of the fluid, so that the accumulated matter is more easily accumulated on the downstream side of the rotating shaft of the accommodating portion than on the upstream side. Therefore, in the present invention, accumulation of accumulated matter in the accommodating portion can be suppressed by providing the inflow port of the accumulated matter escape hole on the downstream side of the rotating shaft of the accommodating portion. As a result, the fuel consumption of the internal combustion engine can be reduced by suppressing the increase in ventilation resistance (pressure loss) in the intake passage while suppressing the accumulation of accumulated matter in the accommodating portion in which the airflow control valve is accommodated. Can be prevented from deteriorating. Further, even when the first intake passage of the intake device main body and the second intake passage of the cylinder head are communicated with each other through the interposed member in this way, by providing the first staying material escape hole in the interposed member, The accumulated matter in the accommodating portion can flow from the accommodating portion of the intake device main body to the downstream cylinder head side via the first accumulated matter escape hole of the interposition member. In addition, by providing the first stagnant escape hole in the interposition member, the first stagnant relief hole can be provided relatively easily, unlike the case where the stagnant relief hole communicating with the housing portion is provided in the intake device body. . Moreover, since the staying material in the housing portion can be guided to the staying material escape hole by the inclined portion, the staying material in the housing portion can be effectively flowed downstream from the staying material escape hole.

  In the intake structure for an internal combustion engine according to the first aspect, preferably, the accommodating portion includes a recess in which the air flow control valve is accommodated, and the staying material escape hole is formed to communicate with the recess. If comprised in this way, since the recessed part in which a stagnant thing arises and the stagnant substance escape hole can be connected directly, a stagnant substance can be made easy to flow to a downstream side via a stagnant substance relief hole.

  In the intake structure for an internal combustion engine according to the first aspect, preferably, in the installed state of the internal combustion engine, the staying material escape hole is provided such that the upstream side of the staying material escape hole is located above the downstream side. . If comprised in this way, using the dead weight of a staying thing, a staying thing can be made to flow easily toward the downstream from the upstream located in the upper part of a staying material escape hole.

In the intake structure for an internal combustion engine according to the first aspect, preferably, the inclined portion has a mortar shape formed so as to guide the accumulated matter to the accumulated matter escape hole. According to this configuration, even when the hole diameter of the stagnant material escape hole is small, the stagnant material in the housing portion is more reliably retained by the mortar-shaped inclined portion formed so as to be guided to the small stagnant material escape hole. It can be led to the escape hole.

  In the intake structure for an internal combustion engine according to the first aspect, preferably, the airflow control valve blocks the flow of fluid toward the stagnant relief hole when the airflow control valve is open, and the airflow control valve is closed. Further, by blocking a part of the fluid flow in the intake passage, the pressure on the inlet side of the stagnant escape hole is increased. With this configuration, when the airflow control valve that needs to supply a large amount of fluid to the internal combustion engine is in an open state, the fluid flow toward the stay escape hole is blocked, thereby causing the stay object escape hole. Since ventilation resistance (pressure loss) can be effectively suppressed, it is possible to suppress deterioration of the fuel consumption of the internal combustion engine when the airflow control valve is open. In addition, when the airflow control valve is closed, a part of the fluid flow in the intake passage is blocked to increase the pressure on the inlet side of the stagnant relief hole, thereby increasing the flow rate on the inlet side of the stagnant relief hole. A pressure difference (differential pressure) can be generated between the outlet side and the outlet side. As a result, a suction force from the inlet side toward the outlet side can be generated in the staying material escape hole, so that the staying material in the staying material escape hole can be effectively flowed downstream.

The Oite the intake structure for an internal combustion engine according to the first aspect, preferably, the retentate exit hole, as continuous with the first retentate exit hole, provided separately from the second intake passage to the cylinder head A second stagnant escape hole is further included. If comprised in this way, the retention thing of a accommodating part is carried out from the accommodating part of an intake device main body to the downstream of a cylinder head via the 1st accumulated substance escape hole of an interposition member, and the 2nd accumulated substance escape hole of a cylinder head. Can flow reliably.

An intake device according to a second aspect of the present invention is provided in an intake device body including an intake passage connected to a combustion chamber of an internal combustion engine and through which a fluid supplied to the combustion chamber flows, and an intake passage of the intake device body. An airflow control valve that controls the flow of fluid by rotating around an axis and an intake passage are provided separately, and an inflow port is provided downstream of the rotation shaft of the housing portion in which the airflow control valve of the intake passage is housed. And a stagnant material escape hole for allowing the stagnant material in the accommodating portion to flow downstream of the fluid flow in the intake passage, wherein the intake passage includes a first intake passage of the main body of the intake device having the accommodating portion, and an internal combustion engine It consists of the second intake passage of the cylinder head that constitutes the combustion chamber of the engine, and the third intake passage of the interposing member provided between the intake device main body and the cylinder head, and the staying material escape hole is interposed The third suction in the member It includes a first staying material escape hole provided separately from the passage, and is provided in the housing part, and downwards toward the first staying material escape hole so as to guide the staying material in the housing part to the first staying material escape hole. An inclined portion that further inclines is further provided, and the upper portion of the first staying material escape hole communicates with the housing portion, and the lower portion of the first staying material escape hole is below the bottom of the sloped portion. step portion that are disposed so as to be located.

In the air intake apparatus according to the second aspect of the present invention, as described above, the air intake control device has an inflow port downstream of the rotation shaft of the housing portion in which the air flow control valve of the air intake passage is housed separately from the air intake passage. A stagnant relief hole is provided to allow the stagnant in the part to flow downstream of the fluid flow in the intake passage. As a result, unlike the case where the intake passage itself is provided with a structure (such as a groove) for allowing the accumulated matter to flow downstream, the accumulated matter relief hole is provided separately from the intake passage. It is possible to suppress the fluid flow in the intake passage from being disturbed by the holes. As a result, it is possible to suppress an increase in ventilation resistance (pressure loss) in the intake passage, and thus it is possible to suppress deterioration in fuel consumption of the internal combustion engine. Further, the accumulated matter in the accommodating portion moves from the upstream side to the downstream side due to the flow of the fluid, so that the accumulated matter is more easily accumulated on the downstream side of the rotating shaft of the accommodating portion than on the upstream side. Therefore, by providing the inflow port of the staying material escape hole on the downstream side of the rotating shaft of the housing unit, it is possible to suppress the accumulation of the accumulated material in the housing unit. As a result, the fuel consumption of the internal combustion engine can be reduced by suppressing the increase in ventilation resistance (pressure loss) in the intake passage while suppressing the accumulation of accumulated matter in the accommodating portion in which the airflow control valve is accommodated. Can be prevented from deteriorating. Further, even when the first intake passage of the intake device main body and the second intake passage of the cylinder head are communicated with each other through the interposed member in this way, by providing the first staying material escape hole in the interposed member, The accumulated matter in the accommodating portion can flow from the accommodating portion of the intake device main body to the downstream cylinder head side via the first accumulated matter escape hole of the interposition member. In addition, by providing the first stagnant escape hole in the interposition member, the first stagnant relief hole can be provided relatively easily, unlike the case where the stagnant relief hole communicating with the housing portion is provided in the intake device body. . Moreover, since the staying material in the housing portion can be guided to the staying material escape hole by the inclined portion, the staying material in the housing portion can be effectively flowed downstream from the staying material escape hole.

  In the present application, the following configuration is also conceivable in the intake structure for the internal combustion engine according to the first aspect.

(Additional item 1)
That is, in the intake structure of the internal combustion engine according to the first aspect, preferably, the stagnant escape hole is formed at the downstream end of the accommodating portion in which the airflow control valve of the intake passage is accommodated. Here, the accumulated matter in the accommodating portion moves from the upstream side to the downstream side due to the flow of the fluid, so that the accumulated matter is most easily accumulated at the downstream end portion of the accommodating portion. Therefore, in the present invention, since the inflow port is provided at the downstream end of the accommodating portion in which the accumulated matter is likely to accumulate, the accumulated matter can be reliably flowed to the downstream side through the accumulated matter releasing hole. It is possible to further suppress the accumulation of accumulated substances.

(Appendix 2)
In the intake structure for an internal combustion engine according to the first aspect, preferably, the intake passage includes a first intake passage of an intake device body having a housing portion including a recess in which an airflow control valve is housed, and combustion of the internal combustion engine. It is constituted by a second intake passage of the cylinder head constituting the chamber and a third intake passage of an interposed member provided between the intake device main body and the intake port of the cylinder head, and the airflow control valve is accommodated in the recess. In the opened state of the air flow control valve, the inner peripheral surface of the intake device body constituting the first intake passage, the inner peripheral surface of the cylinder head constituting the second intake passage, and the air flow control constituting the third intake passage It is configured to be flush with the flow path surface of the valve. If comprised in this way, even if it is a case where the accommodating part in which an airflow control valve is accommodated is formed in the intake device main body, in the open state of an airflow control valve, the intake device main body which comprises a 1st intake passage The inner peripheral surface, the inner peripheral surface of the cylinder head that constitutes the second intake passage, and the flow passage surface of the airflow control valve that constitutes the third intake passage are flush with each other, so that the intake air is opened in the open state of the airflow control valve. It is possible to further suppress the disturbance of the fluid flow in the passage. As a result, an increase in ventilation resistance (pressure loss) in the intake passage can be further suppressed, so that deterioration of the fuel consumption of the internal combustion engine can be further suppressed.

  According to the present invention, as described above, it is possible to suppress an increase in ventilation resistance (pressure loss) in the intake passage while suppressing accumulation of accumulated matter in the accommodating portion in which the airflow control valve is accommodated. Thus, it is possible to provide an intake structure and an intake device for an internal combustion engine that can suppress deterioration in fuel consumption of the internal combustion engine.

It is sectional drawing which showed the state (open state) in which the intake device by one Embodiment of this invention was attached to the engine. It is sectional drawing which showed the state (closed state (maximum)) with which the intake device by one Embodiment of this invention was attached to the engine. 1 is an exploded perspective view showing an overall configuration of an intake device according to an embodiment of the present invention. It is a side view at the time of seeing the intake device by one Embodiment of this invention from the side attached to the cylinder head of an engine. It is a cross-sectional perspective view along the 400-400 line of FIG. It is the expanded sectional view which showed the open state of the valve body by one Embodiment of this invention. It is an expanded sectional view showing the closed state (maximum) of the valve body by one embodiment of the present invention. It is an expanded sectional view showing the closed state (maximum) of the valve body by the modification of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, with reference to FIGS. 1-7, the structure of the intake device 100 by one Embodiment of this invention is demonstrated.

  As shown in FIGS. 1 and 2, an intake device 100 according to an embodiment of the present invention is an intake device provided in an in-line four-cylinder engine 200 for an automobile. In addition, as shown in FIG. 4, the intake device 100 includes a plastic surge tank 10 and a plurality (four) of branching from the surge tank 10 connected to the outlet side of the surge tank 10 (downstream side of the fluid flow). Intake ports 20 and intake control valves 30 (see FIG. 3) provided near the outlets of the four intake ports 20. Structurally, as shown in FIG. 3, the surge tank 10 and the four intake ports 20 are integrally formed by vibration welding to constitute an intake manifold 90. As shown in FIGS. 1 and 2, the opening end 21 of the intake port 20 is connected to the cylinder head 203 of the engine 200 in a state where the intake control valve 30 is incorporated in the intake port 20. Intake manifold 90 is fixed to engine 200 by a fastening member that does not. 1, 2, and 5 to 7 show cross-sectional views of the situation when the engine 200 is mounted on a vehicle (not shown). The engine 200 and the intake manifold 90 are examples of the “internal combustion engine” and the “intake device main body” of the present invention, respectively.

  The engine 200 has a structure in which a cylinder head 203 is connected to the upper end (Z1 side) of a cylinder block 202 containing a piston 201. The cylinder head 203 is supplied with an intake valve 204 that intakes air into the combustion chamber 203a, an exhaust valve 205 that discharges combustion gas, an ignition plug 206 that ignites an air-fuel mixture in the combustion chamber 203a, and fuel is supplied to the combustion chamber 203a. And an injector (not shown). The engine 200 opens the intake valve 204 to supply a fluid to the combustion chamber 203a when the piston 201 performs an intake operation, and supplies fuel from the injector to the combustion chamber 203a. Thereafter, following the compression operation, the air-fuel mixture in the combustion chamber 203a is ignited by the spark plug 206 to cause combustion, and the expansion force due to this combustion is transmitted from the piston 201 to the crankshaft (not shown) and the driving force ( Power) from the crankshaft.

  Further, the engine 200 has an intake passage P2 extending from the intake port 20 side so as to communicate with the combustion chamber 203a. The intake passage P2 is configured to be inclined downward (Z2 side) from the intake port 20 side toward the combustion chamber 203a. In addition, the intake passage P2 is mainly composed of air, and is configured so that a fluid including fuel supplied from the injector, oil in the engine 200, and the like flows. In the drawings, the flow of fluid is indicated by broken-line arrows. The intake passage P2 is an example of the “second intake passage” in the present invention.

  As shown in FIGS. 3 and 4, the intake device 100 has an actuator unit 60 for driving the intake control valve 30 and a function for detecting the opening of the intake control valve 30 and feeding back to the drive control. A sensor unit 70 is attached. In addition, the actuator unit 60 uses the intake control valve 30 (valve body 31 described later) based on information extracted from an operation map (not shown) based on the state of the rotation speed and load of the engine 200 (see FIG. 1). It is comprised so that the attitude | position of may be controlled. Then, the opening information of the intake control valve 30 detected by the sensor unit 70 is fed back to the drive control, and the posture control (opening control) of the intake control valve 30 is repeated. As a result, the intake device 100 appropriately controls the opening area of the intake passage P of the intake port 20 (the cross-sectional area of the opening 22), thereby causing the combustion chamber 203a to have a vertical vortex (tumble flow) or a horizontal vortex (swirl). The combustion efficiency in the engine 200 is increased. The intake control valve 30 and the actuator unit 60 are connected to each other on the X1 side, and the intake control valve 30 and the sensor unit 70 are connected to each other on the X2 side.

  Further, as shown in FIG. 4, the surge tank 10 constituting the intake device 100 is disposed on the upstream side along the flow of the fluid, and the connection portion 11 that opens to the outside is integrally formed with the surge tank 10. ing. Here, generally, an air cleaner (not shown) and a throttle valve 207 (shown by a broken line) are arranged in the intake passage toward the surge tank 10. An outlet 207a of a throttle valve 207 connected via an air duct (not shown) extending from the air cleaner is connected to the connection 11 of the surge tank 10, and the surge tank 10 includes an air cleaner. In addition, the fluid reaching through the throttle valve 207 is introduced.

  The intake port 20 is a molded product integrated with each other on the base side (upstream side), and the base portion of the intake port 20 is formed from the back surface (back side of the paper surface) to the upper surface (Z1 side) of the surge tank 10. Connected to the opening 10a. Each intake port 20 extends in a branched manner from the root side connected to the surge tank 10 toward the tip side (downstream side) connected to the cylinder head 203 (see FIG. 1). In each intake port 20, an opening 22 having a predetermined opening area (flow passage cross-sectional area) is formed at an opening end 21 connected to the cylinder head 203. The four opening end portions 21 (openings 22) are arranged with a predetermined interval in the X direction. In addition, since the structure of the four intake ports 20 of the intake device 100 is substantially the same, hereinafter, the structure of one intake port 20 other than the necessary portions will be described, and the other three intake ports 20 will be described. The description of the structure is omitted.

  As shown in FIGS. 5 and 6, the opening end 21 of the intake port 20 is provided with a concave attachment portion 21 a that is recessed toward the Y1 side. A flange portion 43 of a frame member 41 to be described later and a gasket 50 that surrounds the flange portion 43 in a circumferential shape are fitted into the attachment portion 21a. The intake manifold 90 is configured to be fastened to the mounting surface of the cylinder head 203 in a state where the flange portion 43 and the gasket 50 are fitted into the mounting portion 21a of the opening end portion 21 of the intake port 20. .

  An intake passage P1 extending from the surge tank 10 side toward the engine 200 side is formed inside the intake port 20. The intake passage P1 is configured to flow fluid toward the intake passage P2. Further, in the intake passage P1, in the vicinity of the opening end portion 21 on the engine 200 side (Y2 side), a housing portion 23 in which the valve body 31 of the intake control valve 30 is housed is formed. The accommodating portion 23 has a step-shaped first accommodating portion 23a formed by the lower portion of the inner peripheral surface 20a constituting the intake passage P1 being further depressed downward (Z2 side) at and around the opening end portion 21. And a second accommodating portion 23b formed by recessing the side portion of the inner peripheral surface 20a. The intake passage P1 is an example of the “first intake passage” in the present invention.

  Further, as shown in FIGS. 6 and 7, it is configured to be slightly inclined downward from the Y1 side that is the upstream side of the fluid flow toward the Y2 side that is the downstream side. 6 and 7, members other than the cylinder head 203 of the engine 200 are not shown.

  In addition, in the bottom surface 123a of the first housing portion 23a, an inclination larger than the bottom surface 123a on the upstream side in the vicinity of the attachment portion 21a of the opening end 21 on the downstream side (engine 200 side) toward the escape hole 44 described later. An inclined portion 24 that is inclined downward at an angle is formed. Specifically, as shown in FIG. 5, the inclined portion 24 is formed in a semicircular region centering on a position (the bottom 21 b) facing the escape hole 44 in the mounting portion 21 a on the engine 200 side. Has been. Further, the inclined portion 24 is inclined downward from the entire circumference of the semicircular boundary portion 24a centering on the escape hole 44 toward the bottom end portion 21b which is the downstream end portion of the first accommodating portion 23a. Is formed. That is, the inclined portion 24 has a mortar shape. As a result, the accumulated matter D (see FIGS. 6 and 7) staying in the inclined portion 24 is configured to be led to the bottom 21b and the escape hole 44 by its own weight. The inclined portion 24 and the bottommost portion 21b are formed so as to be located on the downstream side (Y2 side) with respect to the rotation axis A of the valve body 31.

  The intake control valve 30 has a function of controlling the flow of fluid supplied to the combustion chamber 203 a of the engine 200 in the intake port 20. Further, as shown in FIG. 3, the intake control valve 30 includes four valve bodies 31 that control the opening amount of the area (channel cross-sectional area) of the opening 22 (see FIG. 4) of each intake port 20, A total of three rotation shaft members 32 that connect two valve bodies 31 adjacent to each other in the X direction among the valve bodies 31 and a plurality (eight) bearing members 33 that rotatably support the rotation shaft members 32. And. Further, the valve main body 31 is configured to rotate with a rotation axis A extending in the X direction as a rotation center, which includes three rotation shaft members 32. The valve body 31 is an example of the “airflow control valve” in the present invention.

  In addition, the four valve main bodies 31 and the three rotation shaft members 32 are mounted on one end side (Y1 side) of the frame member 41, so that the intake control valve 30 is brought into the intake manifold via the individual frame members 41. It is configured to be assembled into 90 intake ports 20. At this time, the three rotation shaft members 32 are configured to be held so as to be smoothly rotatable by the three spacer members 51 inserted in the direction of the arrow Y2, respectively. 31 is configured to smoothly rotate around the rotation axis A. The frame member 41 is an example of the “intervening member” in the present invention.

  Further, as shown in FIG. 5, the valve body 31 has a bottom portion 31 a and a pair of side portions 31 b formed so as to extend from both sides of the bottom portion 31 a in the X direction, and is formed in a so-called shovel shape. Yes. On the lower surface (Z2 side surface) side of the bottom portion 31a, a plurality of ribs are formed so as to intersect with each other for reinforcement and weight reduction. Further, the bottom surface of the bottom portion 31a constituted by the end surfaces of the plurality of ribs is formed in a substantially arc shape.

  The corners of the bottom 31a and the side 31b of the valve body 31 are rounded. Thereby, when the valve body 31 is in the open state, even if a step is generated between the valve body 31 and the inner peripheral surface 20a of the intake port 20 due to a manufacturing error, the corner of the valve body 31 is Since R is chamfered, it is possible to suppress an increase in ventilation resistance (pressure loss) due to a step.

  Further, as shown in FIGS. 5 and 6, the X1 side and X2 side portions 31b of the valve body 31 are configured to be accommodated in the X1 side and X2 side second accommodating portions 23b, respectively. Further, in the state where the side part 31b of the valve body 31 is accommodated in the second accommodation part 23b, the surface of the side part 31b of the accommodated valve body 31 is the inner periphery of the part where the second accommodation part 23b is not formed. It is formed so as to be substantially flush with the surface 20a (see FIG. 5). Thereby, it is possible to suppress an increase in the ventilation resistance of the intake passage P1.

  Further, the valve body 31 is rotated between the open state shown in FIG. 6 and the closed state shown in FIG. 7 with the rotation axis A extending in the X direction as the rotation center by the operation of the actuator unit 60 (see FIG. 3). It is configured as possible. At this time, the valve body 31 can rotate in a clockwise direction as viewed from the X1 side (counterclockwise direction as viewed from the X2 side) to a predetermined angle (opening) of less than 90 degrees. It is configured. As a result, the valve body 31 is configured to be able to control the flow of fluid in the intake passage P by rotating around the rotation axis A.

  Specifically, as shown in FIG. 6, when the valve main body 31 is in the open state, the bottom 31 a of the valve main body 31 is positioned downward (in the Z2 direction) and at a position where it is accommodated in a recess B described later. It is configured as follows. Thereby, since it can suppress that the bottom part 31a of the valve main body 31 is arrange | positioned in the intake passage P (P1), it is possible to suppress that ventilation resistance arises due to the bottom part 31a. Furthermore, the bottom 31a of the valve body 31 is configured not to block the fluid flow in the intake passage P. That is, the opening area of the intake passage P (the cross-sectional area of the opening 22) is maximized when the valve body 31 is open. In the open state of the valve body 31, the upper surface of the bottom 31a of the valve body 31 and the inner peripheral surface 20a of the intake port 20 are configured to be substantially flush with each other.

  Further, as shown in FIG. 7, when the valve body 31 is in a closed state (a state other than the open state), the bottom portion 31 a of the valve body 31 is configured to be located at a position that blocks a part of the intake passage P. . In this case, the flow path cross-sectional area of the opening 22 of the opening end portion 21 of the intake port 20 is adjusted in a direction to be reduced. FIG. 7 shows a closed state (maximum) in which the valve body 31 is rotated to a position where the area of the opening 22 is minimized, but the valve body 31 is in the open state of FIG. 6 and the closed state of FIG. Control is performed including an intermediate posture position between the states (maximum).

  Here, in the closed state of the valve body 31, the bottom 31a of the valve body 31 blocks a part of the intake passage P, so that the upstream side (Y1 side) of the intake passage P is separated from the bottom 31a of the valve body 31 as a boundary. A differential pressure is generated on the downstream side (Y2 side). Specifically, when the bottom 31a of the valve body 31 blocks a part of the intake passage P, the fluid supplied from the surge tank 10 side stays on the upstream side of the intake passage P from the bottom 31a. On the other hand, on the downstream side of the intake passage P from the bottom 31a, the fluid supply amount (flow rate) decreases. Thereby, the pressure on the upstream side of the intake passage P with respect to the bottom portion 31a becomes larger than the pressure on the downstream side of the intake passage P with respect to the bottom portion 31a.

  Further, as shown in FIG. 6, the bottom 31a of the valve main body 31 is configured to block the flow of fluid to the first accommodating portion 23a (recessed portion B) when the valve main body 31 is open. As shown in FIG. 7, in the closed state of the valve main body 31, it is comprised so that the flow of the fluid to the 1st accommodating part 23a (recessed part B) may not be blocked | interrupted.

  As shown in FIGS. 6 and 7, the frame member 41 includes a main body 42 for constituting the opening 22 and the intake passage P3 in the vicinity of the opening end 21 of the intake port 20. The intake passage P1 of the intake port 20 (intake manifold 90), the intake passage P3 of the frame member 41, and the intake passage P2 of the cylinder head 203 communicate in this order from the upstream side to the downstream side of the fluid flow. An intake passage P is formed. The intake passage P3 is an example of the “third intake passage” in the present invention.

  The main body 42 is formed in a cylindrical shape extending in the Y direction, and is configured such that the inner peripheral surface 42a of the cylindrical side portion forms the intake passage P3. In addition, the inner peripheral surface 42 a of the main body 42 and the inner peripheral surface 20 a of the intake port 20 are substantially flush with each other, and the inner peripheral surface 42 a of the main body 42 and the inner peripheral surface of the cylinder head 203 are configured. 203b is substantially flush with the main body 203b. As a result, when the valve main body 31 is in the open state, the inner peripheral surface 20a of the intake port 20, the upper surface of the bottom 31a of the valve main body 31, the inner peripheral surface 42a of the main body 42 and the inner peripheral surface 203b of the cylinder head 203 are substantially flush. It is configured to be.

  As shown in FIG. 3, bearing mounting portions 42 b into which the bearing members 33 are fitted are formed on both side portions in the X direction of the main body portion 42, and the openings 22 are formed around the opening 22 of the main body portion 42. A flange portion 43 is formed so as to surround the outer periphery.

  Further, as shown in FIGS. 6 and 7, the outer peripheral surface 42c of the side portion of the main body portion 42 is configured to be separated from the bottom surface 123a of the first housing portion 23a by a predetermined distance. That is, a gap is formed in the vertical direction (Z direction) between the main body portion 42 of the frame member 41 and the bottom surface 123a of the first accommodating portion 23a of the intake port 20.

  Further, a notch 42d is formed in a lower portion (Z2 side) of the side portion of the main body portion 42. The notch 42d is formed at a position corresponding to the first accommodating portion 23a of the intake port 20, and is a concave portion in which the bottom 31a of the valve body 31 of the intake control valve 30 is accommodated together with the first accommodating portion 23a. B is configured. Further, the end surface on the Y2 side of the notch 42d is formed in an arc shape so as to correspond to the arc-shaped surface (bottom surface) of the valve body 31. The concave portion B is an example of the “accommodating portion” in the present invention.

  Here, in the present embodiment, an escape hole 44 extending in the Y direction along the intake passage P3 is provided in the lower portion of the flange portion 43 of the frame member 41. Specifically, as shown in FIGS. 5 to 7, the escape hole 44 is formed separately from the intake passage P <b> 3 in the approximate center of the lower portion of the flange portion 43 and penetrates the flange portion 43 in the Y direction. It is formed to do. The relief hole 44 has an elliptical cross-sectional shape that is long in the vertical direction (Z direction). The escape hole 44 is an example of the “first staying material escape hole” in the present invention.

  In addition, in the escape hole 44, the inflow port 44a into which the accumulated matter D from the recess B flows into the escape hole 44 corresponds to the position corresponding to the bottom end 21b that is the downstream end portion of the first housing part 23a (opposite in the Y direction). Is formed at a position where As a result, the inflow port 44a is configured to be positioned on the downstream side (Y2 side) of the rotation axis A of the valve body 31. Further, the upper end of the inflow port 44a is positioned above the bottommost portion 21b (Z1 side), while the lower end of the inflow port 44a is positioned below the bottommost portion 21b (Z2 side). . As a result, the upper portion of the inflow port 44a is configured to communicate with the recess B (first housing portion 23a), while the lower portion of the inflow port 44a is attached to the opening end 21 of the intake port 20. It is comprised so that it may contact | abut on the side surface of the part 21a. Here, since the escape hole 44 has an elliptical cross-sectional shape that is long in the vertical direction, the upper portion of the inflow port 44a can be easily communicated with the recess B.

  In addition, the outlet 44b from which the accumulated matter D flows out from the escape hole 44 is formed below the inlet 44a, and the escape hole 44 is inclined downward from the inlet 44a toward the outlet 44b. Is formed. As a result, the escape hole 44 is provided so that the upstream side is positioned higher than the downstream side.

  In the present embodiment, as shown in FIGS. 6 and 7, on the intake port 20 side (Y1 side) of the cylinder head 203, a relief hole 208 having a circular cross-sectional shape is provided separately from the intake passage P <b> 2. Is provided. The escape hole 208 is formed to extend in the Y direction along the intake passage P2. In addition, in the escape hole 208, the inlet 208a into which the stay D from the escape hole 44 flows into the escape hole 208 is formed at a position corresponding to the outlet 44b of the escape hole 44 (position facing the Y direction). Yes. The upper end of the inflow port 208a is located below (Z2 side) the upper end of the outflow port 44b and above the lower end (Z1 side) of the outflow port 44b, while the lower end of the inflow port 208a is It is formed so as to be positioned below the lower end of the outlet 44b. As a result, the escape hole 208 is configured to communicate with the escape hole 44. The escape hole 208 is an example of the “second staying material escape hole” in the present invention.

  Further, as shown in FIGS. 1 and 2, the outflow port 208b through which the accumulated matter D flows out from the escape hole 208 is configured to communicate with the intake passage P2 in the vicinity of the combustion chamber 203a. The outlet 208b is formed below the inlet 208a, and the escape hole 208 is formed so as to be inclined downward from the inlet 208a toward the outlet 208b. Thereby, in the escape hole 208, it is provided so that the upstream side may be located above the downstream side.

  As a result, the escape hole 44 and the escape hole 208 have the inflow port 44a in the concave portion B, and the residual matter escape hole C for allowing the residual matter D in the concave portion B to flow downstream of the fluid flow in the intake passage P. Is configured. Here, both the escape hole 44 and the escape hole 208 are inclined so that the upstream side (Y1 side) is positioned higher than the downstream side (Y2 side). The side (the inlet 44a side of the escape hole 44) is inclined so as to be positioned above the downstream side (the outlet 208b side of the escape hole 208). As a result, the intake device 100 is configured such that, in the installed state of the engine 200, the stagnant escape hole C is inclined downward from the bottom surface 123a of the first accommodating portion 23a toward the outlet 208b of the escape hole 208. ing.

  Further, in the open state of the valve body 31, the bottom 31a of the valve body 31 blocks the flow of fluid to the first accommodating portion 23a (recessed portion B), so that the fluid flows not only in the recessed portion B but also in the staying material escape hole C. Is configured to be suppressed.

  In the closed state of the valve body 31, the pressure upstream of the intake passage P relative to the bottom portion 31a is greater than the pressure downstream of the intake passage P relative to the bottom portion 31a. The pressure on the side (the inlet 44a side of the escape hole 44) is configured to be larger than the pressure on the downstream side (the outlet 208b side of the escape hole 208).

  As a result, in this embodiment, the intake passage P including the intake passages P1, P2 and P3 communicating with the combustion chamber 203a of the engine, the valve body 31 of the intake control valve 30, the escape hole 44 and the escape hole 208 are provided. An intake structure Q for an internal combustion engine having a stagnant escape hole C is formed.

  Next, with reference to FIG. 1, FIG. 6, and FIG. 7, the discharge of the accumulated matter D in the intake device 100 according to one embodiment of the present invention will be described.

  As the fluid flows through the intake passage P by the intake air generated by the drive of the engine 200, as shown in FIG. 6, the first provided in the lower portion (Z2 side) of the inner peripheral surface 20a of the intake port 20 constituting the intake passage P1. In the 1 accommodating part 23a, the stagnant D comprised from the oil, fuel, water | moisture content, etc. which are contained in the fluid arises.

  Then, the generated accumulated substance D moves from the Y1 side that is the upstream side of the fluid toward the Y2 side that is the downstream side by its own weight. Specifically, the accumulated matter D moves on the bottom surface 123a of the first accommodating portion 23a toward the downstream side toward the inclined portion 24 inclined downward, and then moves on the inclined portion 24 downstream. It reaches the bottom 21b. Then, the staying material D moves from the bottom 21b to the inside of the staying material escape hole C through the inflow port 44a.

  Specifically, the staying material D moves into the escape hole 44 (the staying material escape hole C) of the frame member 41 through the inflow port 44a. Thereafter, the staying substance D moves downstream in the escape hole 44 inclined downward and reaches the outlet 44b. Then, the accumulated matter D moves from the outlet 44b to the inside of the escape hole 208 (the retained matter escape hole C) of the cylinder head 203 through the inflow port 208a. Thereafter, the staying material D moves downstream in the escape hole 208 inclined downward, reaches the outlet 208b, and is discharged to the intake passage P (P2) (see FIG. 1) in the vicinity of the combustion chamber 203a. Finally, the staying material D discharged from the staying material escape hole C is sent into the combustion chamber 203a.

  At this time, as shown in FIG. 7, when the valve main body 31 is in the closed state, the pressure on the upstream side of the stagnant material escape hole C (on the inlet 44 a side of the escape hole 44) is on the downstream side (of the relief hole 208. It becomes larger than the pressure on the outlet 208b side). Therefore, due to the differential pressure, a suction force F that sucks the retained matter D is generated from the inlet 44 a side of the escape hole 44 toward the outlet 208 b side of the escape hole 208. Thereby, in addition to the dead weight of the staying material D, the suction force F acts, so that the staying material D moves more quickly through the staying material escape hole C and is discharged into the intake passage P (P2) near the combustion chamber 203a. Is done.

  As a result, the accumulated matter D is prevented from being accumulated in the first accommodating portion 23a, and the accumulated accumulated matter D prevents the valve body 31 accommodated in the first accommodating portion 23a (recessed portion B) from rotating. Is suppressed.

  In the present embodiment, the following effects can be obtained.

  In the present embodiment, as described above, separately from the intake passage P, the inlet 44a is provided downstream of the rotation axis A of the recess B in which the valve body 31 of the intake passage P is accommodated. A stagnant escape hole C for allowing the stagnant D to flow downstream of the fluid flow in the intake passage P is provided. As a result, unlike the case where the structure (groove part or the like) for flowing the staying material D downstream is provided in the intake passage P itself, the staying material escape hole C is provided separately from the intake passage P. Therefore, it is possible to suppress the fluid flow in the intake passage P from being disturbed by the staying material escape hole C. As a result, it is possible to suppress an increase in ventilation resistance (pressure loss) in the intake passage P, and thus it is possible to suppress deterioration of the fuel consumption of the engine 200. Further, the accumulated matter D in the recess B is moved from the upstream side to the downstream side by the flow of the fluid, so that the accumulated matter D is more easily accumulated on the downstream side of the rotation axis A of the recessed portion B than on the upstream side. Therefore, in the present embodiment, the accumulation 44 is prevented from accumulating in the recess B by forming the inflow port 44a of the accumulation release hole C on the downstream side of the rotation axis A of the recess B. it can. As a result, the engine 200 is prevented from increasing the ventilation resistance (pressure loss) in the intake passage P while suppressing the accumulation of the accumulated matter D in the recess B in which the valve body 31 is accommodated. It is possible to suppress the deterioration of fuel consumption.

  Further, in the present embodiment, by forming the retained matter escape hole C (relief hole 44) so as to communicate with the recessed portion B, the recessed portion B where the retained matter D is generated and the retained matter escape hole C are directly connected. Therefore, the stagnant D can be easily flowed downstream through the stagnant escape hole C.

  Further, in this embodiment, from the upstream side to the downstream side of the fluid flow, the intake passage P1 of the intake port 20 (intake manifold 90), the intake passage P3 of the frame member 41, and the intake passage P2 of the cylinder head 203 are connected to the intake passage P1. The intake passage P is formed by sequentially communicating, and the escape hole 44 is formed separately from the intake passage P3. As a result, even when the intake passage P1 of the intake manifold 90 and the intake passage P2 of the cylinder head 203 are communicated with each other via the frame member 41, by providing the escape hole 44 in the frame member 41, the frame member 41 Through the escape hole 44, the retained matter D in the recess B can flow from the recess B of the intake manifold 90 (intake port 20) to the downstream cylinder head 203 side.

  Further, in the present embodiment, unlike the case where the intake manifold 90 is provided with the escape hole 44 that communicates with the recess B by providing the escape hole 44 in the frame member 41, the escape hole 44 (the residual material escape hole C) is compared. Can be provided easily.

  Further, in the present embodiment, in the installed state of the engine 200, the upstream side (the inlet 44a side of the escape hole 44) of the accumulated matter escape hole C is positioned above the downstream side (the outlet 208b side of the escape hole 208). By forming so as to make it possible, the accumulated weight D can be made to flow easily from the upstream side located above the accumulated material escape hole C toward the downstream side by utilizing the dead weight of the accumulated material D.

  In the present embodiment, the inclined portion 24 retains the concave portion B (first accommodating portion 23a) by providing the concave portion B (first accommodating portion 23a) with the inclined portion 24 that is inclined downward toward the escape hole 44. Since the material D can be guided to the accumulated material escape hole C, the accumulated material D in the recess B can be effectively flowed downstream from the accumulated material escape hole C.

  In the present embodiment, the sloping portion 24 is formed so as to have a mortar shape such that the stagnant D staying in the sloping portion 24 is led to the bottom 21b and the escape hole 44 by its own weight. Even when the diameter of the escape hole C is small, the mortar-shaped inclined portion 24 formed so as to lead to the small retained matter escape hole C ensures more reliably the retained matter D in the recess B (first accommodating portion 23a). Can be led to the accumulated material escape hole C.

  In the present embodiment, the bottom 31a of the valve main body 31 is configured to block the flow of fluid to the first accommodating portion 23a (recessed portion B) when the valve main body 31 is open. Thereby, in the open state of the valve body 31 that needs to supply a large amount of fluid to the engine 200, the ventilation resistance (pressure loss) due to the stay escape hole C can be effectively suppressed. It can suppress that the fuel consumption of the engine 200 in the open state of the valve main body 31 deteriorates.

  Further, in the present embodiment, the bottom portion 31a of the valve main body 31 is configured so as to block a part of the intake passage P when the valve main body 31 is in a closed state (a state other than the open state). The pressure on the upstream side (the inlet 44a side of the escape hole 44) is made larger than the pressure on the downstream side (the outlet 208b side of the escape hole 208). Thereby, a difference in pressure (differential pressure) can be generated between the inflow port 44a side and the outflow port 208b side of the stagnant material escape hole C. A suction force F toward the side can be generated. Thereby, the staying material D in the staying material escape hole C can be effectively flowed to the downstream side. In addition, when the valve body 31 is in a closed state where it is not necessary to supply a large amount of fluid to the engine 200, a suction force F is generated in the staying material D, so that the staying material escape is not caused without degrading the performance of the engine 200. The accumulated substance D in the hole C can be flowed downstream.

  In the present embodiment, the cylinder head 203 is provided with a relief hole 208 separately from the intake passage P2 so as to be continuous with the relief hole 44, whereby the relief hole 44 of the frame member 41 and the relief hole 208 of the cylinder head 203 are provided. Thus, the retained matter D in the recess B can be surely flowed from the recess B of the intake manifold 90 (intake port 20) to the downstream side of the cylinder head 203. Further, unlike the case where a structure (such as a groove) is provided in the intake passage P (P2) of the cylinder head 203 for allowing the accumulated matter D to flow downstream, the fluid in the intake passage P (P2) is released by the escape hole 208. Can be prevented from being disturbed.

  Further, the accumulated matter D in the recess B moves from the upstream side to the downstream side by the flow of the fluid, so that the accumulated matter D is most easily accumulated at the downstream end portion (the bottommost portion 21b) of the recess B. Therefore, in the present embodiment, by providing the inflow port 44a at the downstream end of the recess B where the accumulated matter D is likely to accumulate, the accumulated matter D can be reliably flowed downstream through the accumulated matter releasing hole C. Since it can do, it can suppress more that the accumulated matter D accumulates in the recessed part B.

  Further, in this embodiment, from the upstream side to the downstream side of the fluid flow, the intake passage P1 of the intake port 20 (intake manifold 90), the intake passage P3 of the frame member 41, and the intake passage P2 of the cylinder head 203 are connected to the intake passage P1. The intake passage P is formed by sequentially communicating. When the valve main body 31 is in the open state, the inner peripheral surface 20a of the intake port 20, the upper surface of the bottom 31a of the valve main body 31, the inner peripheral surface 42a of the main body 42 and the inner peripheral surface 203b of the cylinder head 203 are substantially flush. Configure to be Thus, even if the recess B (first housing portion 23a) in which the valve body 31 is housed is formed in the intake manifold 90 (intake port 20), the stagnant material escape hole is provided separately from the intake passage P. In addition to the provision of C, in the open state of the valve body 31, the inner peripheral surface 20a of the intake manifold 90 that constitutes the intake passage P1, and the inner peripheral surface 203b of the cylinder head 203 that constitutes the intake passage P2. Further, since the upper surface of the bottom 31a of the valve body 31 constituting the intake passage P3 is substantially flush, the fluid flow in the intake passage P is further prevented from being disturbed in the open state of the valve body 31. Can do. Thereby, it is possible to further suppress an increase in ventilation resistance (pressure loss) in the intake passage P, and thus it is possible to further suppress the deterioration of the fuel consumption of the engine 200.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the said embodiment, although the example which provided the inclination part 24 in the bottom face 123a of the 1st accommodating part 23a (recessed part B) of the intake port 20 was shown, this invention is not limited to this. In the present invention, instead of the inclined portion 24, an inflow port 324a formed on the bottom surface 123a of the recess B and an outflow port 324b formed on the attachment portion 21a are used instead of the inclined portion 24 as in the modification of the present embodiment shown in FIG. The escape hole 324 may be provided so as to penetrate the intake port 320. In the escape hole 324, the outflow port 324 b is formed in the attachment portion 21 a so as to communicate with the escape hole 44, and the inflow port 324 a is formed on the downstream side (Y2 side) of the rotation axis A of the valve body 31. The The escape hole 324 is configured to be inclined downward (Z1 side) from the upstream side (Y1 side) inlet 324a toward the downstream side outlet 324b. In this modified example, the escape hole 324, the escape hole 44, and the escape hole 208 have an inflow port 324a in the recess B, and the retained matter D in the recess B flows to the downstream side of the fluid flow in the intake passage P. For this reason, a retained material escape hole C1 is formed.

  Moreover, in the modification of the said embodiment, although the example which provided the escape hole 324 without providing an inclination part in the bottom face 123a of the 1st accommodating part 23a was shown, this invention is not limited to this. In the present invention, in addition to the configuration of the modified example of the above embodiment, an inclined portion that is inclined downward toward the escape hole may be provided on the bottom surface of the first housing portion.

  Moreover, in the said embodiment, the example which comprises the staying material escape hole C by the relief hole 44 of the frame member 41 and the relief hole 208 of the cylinder head 203 is shown, and in the modification of the said embodiment, the relief hole of the intake port 320 is shown. Although an example is shown in which the stagnant material escape hole C1 is configured by the escape hole 44 of the cylinder member 203 and the escape hole 44 of the frame member 41, the present invention is not limited to this. In the present invention, the stagnant material escape hole may be constituted only by the relief hole of the intake port and the escape hole of the frame member. At this time, the accumulated matter may be discharged to the intake passage from the discharge port provided in the frame member without forming the escape hole in the cylinder head. Further, the staying material may be discharged from the frame member to a storage unit for separately storing the staying material without forming a relief hole in the cylinder head. Thereby, since it is not necessary to connect the intake passage and the discharge port of the stagnant material escape hole, it is possible to further reduce the ventilation resistance (pressure loss).

  In the above-described embodiment, the example in which the intake control valve 30 is assembled into the intake port 20 of the intake manifold 90 via the frame member 41 is shown, but the present invention is not limited to this. In the present invention, the intake control valve may be directly assembled in the intake port of the intake manifold without using the frame member. In this case, the staying material escape hole is provided in the cylinder head so as to communicate with an escape hole (see the relief hole 324 in FIG. 8) provided in the intake port so as to communicate with the accommodating portion and an escape port of the intake port. And a relief hole (see the relief hole 208 in FIG. 8). If comprised in this way, since it is not necessary to provide a frame member, it is possible to reduce the number of parts in the intake structure of the internal combustion engine.

  In the above-described embodiment, the example in which the four valve bodies 31 are arranged in each of the four (four stations) intake ports has been described, but the present invention is not limited to this. In the present invention, if the air flow control valve is a multiple air flow control valve having a plurality of valve body bodies, the intake structure for an internal combustion engine of the present invention is applied to the multiple air flow control valves other than the above four air flow control valves. May be.

  Moreover, although the said embodiment showed the example which provided the mortar-shaped inclination part 24 in the attachment part 21a vicinity of the opening end 21 of the downstream (engine 200 side) among the bottom faces 123a of the 1st accommodating part 23a. The present invention is not limited to this. In this invention, you may form so that a mortar-shaped inclination part may straddle both the upstream and downstream of the bottom face of a 1st accommodating part. That is, a mortar-shaped inclined portion may be formed on the upstream side of the rotating shaft of the valve body.

  In the above embodiment, the intake control valve 30 is assembled in the intake port 20 of the intake manifold 90. However, the present invention is not limited to this. In the present invention, the intake control valve may be assembled in the cylinder head of the engine or in the frame member.

  In the above embodiment, the intake control valve 30 and the intake device 100 having the intake structure for the internal combustion engine of the present invention are applied to an in-line four-cylinder engine 200 for automobiles. It is not limited to this. The intake control valve 30 and the intake device 100 having the intake structure of the internal combustion engine of the present invention are used for an internal combustion engine other than an automobile engine 200 (for example, a gas engine other than a gasoline engine (an internal combustion engine such as a diesel engine and a gas engine)). You may apply to the intake structure of internal combustion engines, such as. Further, the present invention may be applied to an intake structure of an internal combustion engine such as a V-type multi-cylinder engine or a horizontally opposed engine other than the in-line four-cylinder engine 200 regardless of whether it is a gasoline engine.

24 Inclined part 31 Valve body (Airflow control valve)
41 Frame member (intervening member)
44 Relief hole (first staying material relief hole)
44a, 324a Inlet port 90 Intake manifold (intake unit body)
100 Intake device 200 Engine (internal combustion engine)
203 Cylinder head 203a Combustion chamber 208 Relief hole (second staying material escape hole)
A Rotating shaft B Recessed part (accommodating part)
C, C1 Retained material escape hole D Retained material P Intake passage P1 Intake passage (first intake passage)
P2 intake passage (second intake passage)
P3 Intake passage (third intake passage)
Q Intake structure of internal combustion engine

Claims (7)

An intake passage that is in communication with a combustion chamber of the internal combustion engine and through which a fluid supplied to the combustion chamber flows;
An airflow control valve that is provided in the intake passage and controls the flow of fluid by rotating around a rotation axis;
The intake passage is provided separately from the intake passage, and has an inlet port downstream of the rotation shaft of the storage portion in which the airflow control valve of the intake passage is stored. A stagnant relief hole for flowing downstream of the fluid flow ,
The intake passage includes a first intake passage of an intake device main body having the housing portion, a second intake passage of a cylinder head constituting a combustion chamber of the internal combustion engine, and the intake device main body and the cylinder head. A third intake passage of an interposed member provided,
The staying material escape hole includes a first staying material escape hole provided separately from the third intake passage in the interposition member,
An inclined portion that is provided in the accommodating portion and is inclined downward toward the first accumulated matter escape hole so as to guide the accumulated matter in the accommodated portion to the first accumulated matter escape hole;
An upper portion of the first staying material escape hole communicates with the housing portion, and a lower portion of the first staying material escape hole is positioned below the bottom of the inclined portion. An intake structure for an internal combustion engine in which a step portion is provided as described above . The accommodating portion includes a recess in which the airflow control valve is accommodated,
The intake structure for an internal combustion engine according to claim 1, wherein the stagnant material escape hole is formed to communicate with the recess. 3. The intake air of the internal combustion engine according to claim 1, wherein in the installed state of the internal combustion engine, the stagnant material escape hole is provided such that an upstream side of the stagnant material escape hole is positioned above a downstream side. Construction. The intake structure of an internal combustion engine according to any one of claims 1 to 3, wherein the inclined portion has a mortar shape formed so as to guide the accumulated matter to the accumulated matter escape hole. The air flow control valve blocks the flow of fluid toward the stagnant relief hole when the air flow control valve is in an open state, and part of the flow of fluid in the intake passage when the air flow control valve is in a closed state. The intake structure for an internal combustion engine according to any one of claims 1 to 4 , wherein the intake structure is configured to increase pressure on an inflow side of the accumulated matter escape hole by blocking. The said accumulated matter escape hole further includes a second accumulated matter escape hole provided separately from the second intake passage in the cylinder head so as to be continuous with the first accumulated matter escape hole . The intake structure for an internal combustion engine according to any one of claims 5 to 6. An intake device main body including an intake passage connected to a combustion chamber of an internal combustion engine and through which a fluid supplied to the combustion chamber flows;
An airflow control valve that is provided in the intake passage of the intake device body and controls the flow of fluid by rotating around a rotation axis;
The intake passage is provided separately from the intake passage, and has an inlet port downstream of the rotation shaft of the storage portion in which the airflow control valve of the intake passage is stored. A stagnant relief hole for flowing downstream of the fluid flow ,
The intake passage includes a first intake passage of the intake device body having the housing portion, a second intake passage of a cylinder head constituting a combustion chamber of the internal combustion engine, and a space between the intake device body and the cylinder head. And the third intake passage of the interposition member provided in the
The staying material escape hole includes a first staying material escape hole provided separately from the third intake passage in the interposition member,
An inclined portion that is provided in the accommodating portion and is inclined downward toward the first accumulated matter escape hole so as to guide the accumulated matter in the accommodated portion to the first accumulated matter escape hole;
An upper portion of the first staying material escape hole communicates with the housing portion, and a lower portion of the first staying material escape hole is positioned below the bottom of the inclined portion. The air intake device is provided with a stepped portion .

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