JP6355603B2 - Intake device - Google Patents

Description

  The present invention relates to an intake device provided on an intake side of an internal combustion engine used in an automobile, a motorcycle, or the like.

  Patent Document 1 (Japanese Patent Laid-Open No. 2002-213310) relates to a structure of an air cleaner provided at an air intake port in an internal combustion engine for automobiles, and it is possible to replace the filter and easily reduce the cost. This is a problem in which a filter is detachably attached to a main frame of an air cleaner. In this air cleaner, a filter is formed of a non-woven fabric, and a plant frame that is interposed inside the filter and maintains the shape of the filter is placed on a main frame that is a noble base on which the filter is placed. Are provided with rectifying blades arranged at intervals in the circumferential direction so as to rectify the intake air while maintaining the shape of the filter in a substantially conical shape or a substantially trapezoidal shape.

  Patent Document 2 (Japanese Patent Laid-Open No. 2013-231398) discloses an intake control box upstream of a throttle valve in an intake passage of an internal combustion engine, in order to provide a variable intake passage that improves the charging efficiency of the internal combustion engine, An intake control valve is provided at the inlet, and the cross-sectional area of the intake control box is 8 to 10 times the cross-sectional area of the intake passage, and is cylindrical or rectangular parallelepiped with a capacity of 120% to 200% of the total displacement. Yes, the intake control valve is controlled by an ECU or damper to open and close to control the gap with the intake passage, and the intake air flow rate and inertia at the intake of the intake control box are increased compared to the outlet. It is characterized by improving the charging efficiency by generating a check valve effect in the control box.

  Patent Document 3 (Japanese Patent Application Laid-Open No. 2014-214696) is intended to provide a cylindrical air cleaner for the purpose of suppressing evaporative fuel from flowing into the atmosphere even when the filter element is replaced. It is. A cylindrical air cleaner according to the present invention is provided in an intake passage of an internal combustion engine, and includes a housing provided with an introduction port for introducing air from the atmosphere side and a discharge port for discharging air on the engine side. And a cylindrical filter element that is housed inside the case constituting the housing and filters foreign matter contained in the air introduced through the inlet of the cap, and is provided on the inner periphery of the filter element and flows in through a discharge pipe. And a cylindrical adsorbing member for adsorbing the evaporated fuel.

JP 2002-213310 A JP 2013-231398 A JP 2014-214696 A

  Conventionally, in order to achieve an optimal intake effect in an internal combustion engine used in automobiles, motorcycles, etc., an intake chamber effect, a suction negative pressure reduction effect, an intake collector tank effect, an air funnel are provided on the intake side of the internal combustion engine. It has been desired to have a structure that exhibits an effect and a variable intake effect.

  The intake chamber effect generated by providing the intake chamber on the intake side of the internal combustion engine is an important point for the internal combustion engine in which the intake air amount constantly varies. For example, by providing sufficient capacity in the suction pipe from the air filter to the turbo compressor, the turbo lag is reduced and the inertial supercharging effect is frequently applied to sudden accelerator ON / OFF operations. It is effective for stop-and-go, and is effective for raising from low speed and improving torque.

  Further, regarding the suction negative pressure reduction effect, since the suction negative pressure is proportional to the suction resistance, the reduction of the suction resistance is a particularly important requirement particularly for the turbo. Moreover, the reduction of the suction negative pressure can also reduce clogging at the time of high rotation.

  The intake collector tank has the same effect as the intake chamber of a naturally aspirated (NA) engine in the case of a turbo. Specifically, in the case of a turbo engine, a turbo compressor, an intercooler, And because there is an element of intake resistance such as piping that connects them, the slot that just becomes large in the NA area where turbocharging is not sufficiently raised, such as when opening the accelerator from a negative pressure state The suction negative pressure immediately before the valve is further increased due to their resistance, which causes a problem that the oxygen density immediately before the throttle valve is temporarily reduced. For this reason, by installing a collector tank in front of the turbine or supercharger, a large amount of air accumulated there immediately enters the port at the moment when the throttle is opened. As a result, the torque can be quickly increased with respect to the opening and closing of the motor.

  Furthermore, the air funnel effect has a structure that gradually reduces the diameter from the large-diameter suction port, so that the inner diameter of the pipe is infinitely widened. It can inhale air for an area many times the diameter. For this reason, it is possible to ensure the maximum intake at the time of high rotation.

  In view of the above, the present invention is to provide an intake device having a structure that achieves an intake chamber effect, a suction negative pressure reduction effect, an intake collector tank effect, an air funnel effect, and a variable intake effect.

  An intake device according to the present invention is an intake device disposed on the suction side of an internal combustion engine such as an automobile or a motorcycle, and includes a cylindrical intake chamber body having suction side opening portions and discharge side opening portions at both ends, and the intake device. Air that is attached to the suction side opening of the chamber body and has a truncated conical shape that extends while reducing the diameter toward the discharge side opening, and that defines the intake chamber body into a suction side space and a discharge side space. An intake filter, an air intake funnel that is attached to the suction side opening of the intake chamber body and expands in a trumpet shape toward the suction direction, and the suction side opening are each an abbreviation of the suction side opening. It consists of a pair of door parts composed of a valve shaft that bridges the center and a door part that rotates around the valve shaft as a rotation fulcrum. Is to comprise a valve, the opening and closing means for opening and closing the valve.

  As a result, the air intake filter has a truncated conical shape extending from the suction-side opening toward the discharge-side opening, and thus the air moving from the suction opening to the discharge opening of the intake chamber body. On the other hand, since the filter part is inclined, the air passage area can be made wider than in the case where it is arranged vertically, so that ventilation resistance (suction resistance) can be reduced and the filter area is secured. Is something that can be done. Also, in the case of a truncated cone-shaped air filter that expands toward the discharge side, the air collected by the air intake funnel described below flows in along the upper wall surface of the fluid dynamics, so the discharge side diameter increase Although air resistance may increase due to collision with the tip portion of the part, in the structure of the air intake filter according to the present invention, the air that has flowed in passes along the side surface whose diameter is reduced toward the outside with a large volume. Therefore, there is an effect that an increase in ventilation resistance can be suppressed and an effect that dust collection efficiency is improved. In addition, the butterfly type door of the valve can generate an effect as a rectifying plate, and an increase in suction resistance due to turbulent intake air can be prevented.

  Further, the air intake filter has a mesh three-layer structure made of stainless mesh having a predetermined mesh gap, the first and third layers have a predetermined mesh gap, and the first and third layers have a mesh gap. It is desirable that the second layer in between has a mesh gap smaller than the mesh gap of the first and third layers.

  By adopting a mesh structure made of stainless steel mesh, maintenance can be sufficiently performed only by cleaning, so that it can be used semipermanently. Further, as a three-layer structure, the mesh gap on both sides (first and third layers) is larger (for example, 300 μm), and the mesh gap on the center side (second layer) is smaller than the outside (for example, 70 μm). ), Large dust contained in the air is first removed by the outer layer (for example, the first layer), and clogging on the inner side can be prevented. In addition, by arranging a larger mesh on the inner side (third layer), a strong mesh with a large gap is provided so that the mesh is not deformed by the intake air pressure and does not become suction resistance, so that it has an effect as a support. It is something that can be done.

  Furthermore, it is desirable that the opening / closing means includes a driving means for rotating each valve shaft of the valve in accordance with a parameter relating to control of the internal combustion engine. The parameters relating to the control of the internal combustion engine are parameters such as throttle opening / closing, engine speed, vehicle speed, braking, and front / rear / right / left G by G sensor. Further, the parameter is an intake pressure. Further, the driving means is an actuator, and the accelerator and the opening / closing means can be easily linked by connecting the actuators linked to the intake pressure to the respective valve shafts by linkages. Further, since the valve opening / closing means can control each door portion independently, the rectification and intake patterns can be combined in various ways. Further, since the structure is opened and closed by the pair of door portions, the suction resistance relating to one door portion can be reduced as much as possible.

  When the accelerator is off, the valve is closed by actuator control due to the negative pressure of the intake pressure to increase the flow rate and increase the suction efficiency to improve the response, and the vehicle can easily advance even with a small accelerator opening, achieving an improvement in fuel economy it can.

  On the other hand, when the accelerator is opened by overtaking, etc., the intake pressure decreases from the negative pressure, and the control in the case of a turbo car opens the valve fully, enabling the effect of the rectifying plate to take in a lot of air, As a result, acceleration can be achieved in a short time due to an increase in engine output, which can contribute to fuel efficiency improvement.

  Further, a space of a predetermined volume can be formed on the downstream side of the valve depending on the opening state of the valve, and the intake chamber effect or the intake collector is determined by this space and the space located on the downstream side of the air intake filter. A tank effect can be achieved. Further, by reducing the suction resistance, the suction negative pressure proportional to the suction resistance can also be reduced, so that an effect of reducing the suction negative pressure can be achieved.

  Further, it is desirable that an air intake funnel extending in a reduced diameter from the suction side opening to the discharge side opening is provided in the suction side opening of the intake chamber body.

  As a result, a funnel structure can be provided on the intake side of the intake chamber body, so that maximum intake at high rotation can be achieved.

  Moreover, it is desirable that the valve can be set manually. For this reason, for example, when traveling at medium to low speeds is frequent, the drive shaft is manually rotated in advance so that the opening area of the opening is reduced by the valve body, and when traveling at high speeds is frequent. Is capable of improving torque feeling and response in each speed range by manually increasing the opening area of the opening in advance.

  As described above, according to the present invention, the air intake filter has a truncated conical shape that extends from the suction side opening toward the discharge side opening, and has a predetermined volume on the wake side. By defining the discharge side space, the intake chamber effect, the suction negative pressure reducing effect, and the intake collector tank effect can be achieved. Further, by providing a funnel structure on the intake side of the intake chamber body, the air funnel effect, that is, the maximum intake at a so-called high rotation can be achieved.

  Furthermore, a variable intake effect can be achieved by providing a valve for opening and closing the intake side opening of the intake chamber body or the opening of the air intake funnel. As described above, according to the present invention, the above-described intake chamber effect, suction negative pressure reduction effect, intake collector tank effect, air funnel effect, and variable intake effect can be achieved.

It is explanatory drawing which showed the structure of the intake apparatus which concerns on the Example of this invention. It is explanatory drawing which showed an example of the opening-and-closing state of the valve | bulb of the intake device which concerns on the Example of this invention. It is explanatory drawing which showed another example of the opening-and-closing state of the valve | bulb of the intake device which concerns on the Example of this invention. It is explanatory drawing which showed the air intake filter of the intake device which concerns on the Example of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  An intake device 1 according to the present invention is disposed at a front end portion on an intake side of an internal combustion engine such as an automobile or a motorcycle (not shown). In the case of natural intake, the intake is in front of the throttle valve, and in the case of forced intake. As shown in FIG. 1, a cylindrical intake chamber body 2 having a suction side opening 2a and a discharge side opening 2b at both ends is provided. In the present embodiment, the intake chamber body 2 has a cylindrical shape in the present embodiment, but may have an elliptic cylinder shape, and the shape thereof is not particularly limited.

  The air intake filter 3 is attached to the suction side opening 2a of the intake chamber body 2, and the diameter of the air intake filter 3 is reduced from the attachment part 3a of the suction side opening 2a toward the discharge side opening 2b. The end of the discharge side is closed by the closing cap 3b. For example, as shown in FIG. 4, the frustoconical filter portion 30 is formed by a three-layer structure of a mesh structure made of stainless mesh, and the first layer 31 and the third layer 33 are relatively rough. The second layer 32 located in the middle is formed with a relatively fine mesh interval, for example, 70 μm. By adopting such a three-layered mesh structure of stainless steel mesh, it is possible to ensure the dust absorption capability and reduce the ventilation resistance and the suction negative pressure. Moreover, since it is a mesh structure by a stainless mesh, it is easy to wash and improves maintainability.

  The air intake filter 3 is basically fixed by a shaft, and the number of shafts is basically three, but the number can be increased or decreased depending on the mesh layer, mesh gap, material, and the like. At the same time, only the filter unit 30 can be disassembled and removed by fixing the shaft, so that replacement and cleaning are facilitated. Furthermore, since the filter unit 30 can be replaced, the configuration of the mesh layer, the mesh gap, and the material of the filter unit 30 can be changed depending on the use environment, the type of vehicle used, and the like.

  The filter section 30 divides the intake chamber body 2 into a suction side space 2c and a discharge side space 2d. The discharge-side space 2d has a predetermined volume, and the discharge-side space 2d having the predetermined volume serves as a pre-turbine collector tank or a pre-intake collector tank. It will be possible to cope with sudden fluctuations in A guide wall 2e is provided in the discharge side opening 2b of the intake chamber body 2, and a connecting pipe 2f is provided outside the guide wall 2e, and is connected downstream. Further, the guide wall 2e is provided with a tapered portion 2g having a diameter reduced toward the connecting pipe 2f, and the funnel effect can be obtained even on the downstream side.

  In addition, an air intake funnel 4 extending from the suction side opening 2a toward the discharge side opening 2b with a reduced diameter is provided in the suction side opening 2a of the intake chamber body 2.

  Between the air intake funnel 4 and the air intake filter 3, a valve 6 for changing the opening ratio of the air passage 4a of the air intake funnel 4 is provided. The valve 6 includes valve shafts 61 and 62 that bridge the substantial center of the air passage 4a in the suction side opening 2a, and door portions 63 and 64 that rotate about the valve shafts 61 and 62 as rotation fulcrums. A pair of butterfly doors.

  The valve shafts 61 and 62 are connected to actuators 67 and 68 via coupling mechanisms 65 and 66, respectively. The valve shafts 61 and 62 are rotated by driving of the actuators 67 and 68, and the door portions 63 and 64 are connected to the air. The passage 4a is opened and closed. The actuators 67 and 68 are controlled independently or simultaneously by a control unit (C / U) 7. The control unit 7 inputs parameters for controlling the rotation of the internal combustion engine, such as throttle opening / closing, engine speed, vehicle speed, braking, front / rear / left / right G parameters, and intake pressure. After being input through the terminals 71, 72, 73 and the like and processed in accordance with a predetermined program, the actuators 67, 68 are driven to open and close the valve 6. Further, with respect to this actuator control, analog control for analog control corresponding to the pressure of the intake and program control by inputting various electric signals described above are possible. In order to drive the actuators 67 and 68, a method using a stepping motor or an electromagnetic valve is desirable.

  In addition, the above-described valve 6 can produce a wide variety of air flows including forward and backward movement of the valve 6. In addition, the coupling mechanisms 65 and 66 have a structure that can be manually disconnected from the actuators 67 and 68, whereby the valve 6 can be manually opened and closed. In this case, for example, when the vehicle travels at medium and low speeds, the opening area of the air passage 4a is manually reduced in advance. When the vehicle travels at high speeds, the opening area of the air passage 4a is reduced. By making it large, it is possible to improve the torque feeling and response in each speed range. In addition, since manual operation is possible, it is possible to easily switch to manual control in an emergency.

  By linking the intake pressure with the actuators 67 and 68, the valve 6 is closed by the actuator control by the negative pressure of the intake pressure when the accelerator is turned off to increase the flow velocity, and the response is improved by increasing the suction efficiency, thereby reducing the accelerator opening. However, since the rotation speed of the internal combustion engine can be easily improved, the fuel efficiency improvement effect can be achieved. In addition, when the accelerator is opened by overtaking, etc., the intake pressure is reduced from the negative pressure, so the valve 6 is fully opened due to the suppression in the case of a turbo car. As a result, since the output of the internal combustion engine is increased, acceleration can be achieved in a short time, which can contribute to improvement of fuel consumption.

  FIG. 2 shows a state in which the door portions 63 and 64 of the valve 6 are half open to the front side (outside opening). In this case, the door portions 63 and 64 function as a current plate and limit the opening of the air passage 4a. Therefore, the speed of the intake air increases, so that the intake air can efficiently pass through the filter portion 30. is there.

  FIG. 3 shows a state in which the door portions 63 and 64 of the valve 6 are half opened rearward (inward opening). In this case, while functioning as a current plate for the door portions 63 and 64, and a predetermined space (suction side space 2c) is secured on the downstream side of the door portions 63 and 64, in combination with the discharge side space 2d, An intake chamber effect or an intake collector tank effect can be achieved.

  Furthermore, in the case of the outward opening and the inward opening described above, not only the rectification but also the current guiding effect can be exhibited. For example, when opening outwardly with a reverse eight figure along the funnel wall, it has the effect of guiding turbulent air to the funnel wall, and conversely when opening inward The effect is that the intake air can be guided to the filter wall while being rectified.

  Further, in the above-described embodiment, the valve 6 is shown as an example in which the door portions 63 and 64 are simultaneously controlled. However, one door portion 63 and 64 is manually fixed, and the other door portion 64 and 63 is automatically operated. You may make it control.

DESCRIPTION OF SYMBOLS 1 Intake apparatus 2 Intake chamber body 2a Suction side opening 2b Discharge side opening 2c Suction side space 2d Discharge side space 2e Guide wall 2f Connection pipe 2g Taper part 3 Air intake filter 3a Mounting part 3b Cap part 4 Air intake funnel 4a Air Passage 6 Valve 7 Control unit 30 Filter part 31 1st layer 32 2nd layer 33 3rd layer 61,62 Valve shaft 63,64 Door part 65,66 Connection mechanism 67,68 Actuator

Claims (3)

In an intake device arranged on the suction side of an internal combustion engine such as an automobile or a motorcycle,
A cylindrical intake chamber body having suction side openings and discharge side openings at both ends;
A frustoconical shape that is attached to the suction side opening of the intake chamber body and extends while reducing the diameter toward the discharge side opening, and defines the intake chamber body into a suction side space and a discharge side space. An air intake filter,
An air intake funnel that is attached to the suction side opening of the intake chamber body and expands in a trumpet shape toward the suction direction;
Each of the suction side openings includes a valve formed of a pair of doors each formed by a valve shaft that bridges the substantial center of the suction side opening and a door that rotates around the valve shaft as a rotation fulcrum. ,
An intake device comprising an opening / closing means for opening and closing the valve.   The air intake filter has a mesh three-layer structure made of stainless mesh having a predetermined mesh gap, the first and third layers have a predetermined mesh gap, and the first and third layers are between the first and third layers. The intake device according to claim 1, wherein the second layer has a mesh gap smaller than the mesh gap of the first and third layers.   3. The intake device according to claim 1, wherein the opening / closing means includes a driving means for rotating each valve shaft of the valve in accordance with a parameter relating to control of the internal combustion engine.

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