WO2015093395A1 - Dispositif de génération de pression négative - Google Patents

Dispositif de génération de pression négative Download PDF

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Publication number
WO2015093395A1
WO2015093395A1 PCT/JP2014/082866 JP2014082866W WO2015093395A1 WO 2015093395 A1 WO2015093395 A1 WO 2015093395A1 JP 2014082866 W JP2014082866 W JP 2014082866W WO 2015093395 A1 WO2015093395 A1 WO 2015093395A1
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WO
WIPO (PCT)
Prior art keywords
valve
negative pressure
intake passage
link
sectional area
Prior art date
Application number
PCT/JP2014/082866
Other languages
English (en)
Japanese (ja)
Inventor
信悟 田畑
透 三澤
佑一 小池
Original Assignee
株式会社ミクニ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ミクニ filed Critical 株式会社ミクニ
Publication of WO2015093395A1 publication Critical patent/WO2015093395A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/04—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by mechanical control linkages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035—Details of the valve housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/221—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves specially adapted operating means therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/52—Means for additional adjustment of the rate of flow
    • F16K1/526—Means for additional adjustment of the rate of flow for limiting the maximum flow rate, using a second valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/54—Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
    • F16K3/0254—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor being operated by particular means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/521—Mechanical actuating means with crank, eccentric, or cam comprising a pivoted disc or flap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F02D2009/0201—Arrangements; Control features; Details thereof
    • F02D2009/024—Increasing intake vacuum

Definitions

  • the present invention relates to a negative pressure generating device that generates a negative pressure by gas flowing through an intake passage.
  • An internal combustion engine such as an automobile is provided with a throttle body (negative pressure generator) into which intake air that has passed through an air cleaner, an intercooler, or the like is introduced.
  • the throttle body is provided with a butterfly throttle valve that opens and closes in conjunction with the operation of the accelerator pedal.
  • a configuration in which such a throttle valve is incorporated in an intake passage for example, there is one disclosed in Patent Document 1.
  • Patent Document 1 shows a configuration in which a venturi-shaped venturi section having a narrowed flow path is provided downstream of a throttle valve in a suction passage.
  • the venturi portion is fixedly provided.
  • the pressure loss becomes large, and the suction loss of the internal combustion engine may increase due to such pressure loss.
  • the diameter of the venturi portion is fixed, there is a region where the negative pressure cannot be sufficiently increased depending on the opening of the throttle valve.
  • the present invention has been made on the basis of the above circumstances, and its object is to provide a negative pressure generating device capable of reducing pressure loss and improving the negative pressure even at various throttle valve openings. It is intended to provide.
  • a negative pressure generating device capable of generating a negative pressure in an intake passage, which is provided in the intake passage and is changed by position change.
  • a first valve capable of changing the cross-sectional area of the flow path and a second valve provided on the downstream side of the first valve in the intake passage and capable of changing the cross-sectional area of the flow path by changing the position
  • interlocking means for causing the second valve to change its position by moving the interlocking part as the position of the first valve changes, and the interlocking means includes a flow of the intake passage.
  • a negative pressure generating device characterized in that when the road cross-sectional area is widened from the state in which the first valve is the narrowest, a play portion that does not cause a change in the position of the second valve is provided until the first opening degree. Is provided.
  • the venturi portion where the second valve is located is provided with a projecting member that projects in a direction to narrow the flow passage cross-sectional area of the venturi portion.
  • a projecting member that projects in a direction to narrow the flow passage cross-sectional area of the venturi portion.
  • the first valve is a throttle valve that changes a cross-sectional area of the flow path by rotating about a rotation shaft
  • the second valve is The slide valve is preferably a slide valve that changes the cross-sectional area of the flow path when it appears and disappears.
  • the interlocking unit is a link mechanism including a plurality of links, and two links among the plurality of links are connected to each other via a joint.
  • a joint is attached to one link, a joint is slidably inserted into the other link, and a long hole portion corresponding to the play portion is provided.
  • the second valve is inhaled by the urging means. It is preferable to be biased in the direction of narrowing the cross-sectional area of the passage.
  • the negative pressure generating device in the negative pressure generating device, it is possible to reduce the pressure loss and improve the negative pressure even at various opening degrees of the throttle valve.
  • FIG. 1 It is a perspective view which shows the structure of the throttle body which concerns on one embodiment of this invention. It is a perspective view which shows the half cross-sectional state of a structure of the throttle body of FIG. It is a perspective view which shows the structure of a slide valve with the throttle valve in the throttle body of FIG. It is a perspective view which shows the half cross-sectional state of the structure of the slide valve and storage housing
  • a throttle body 10 as a negative pressure generating device will be described with reference to the drawings.
  • an XYZ orthogonal coordinate system may be used for explanation, where the X direction is the direction in which the intake passage 21 flows, the X1 side is the upstream side to the downstream side, and the X2 side is the downstream side to the upstream side.
  • the Z direction is the direction in which the slide valve 50 moves, the Z1 side is the upper side (that is, the side where the intake passage 21 is opened), and the Z2 side is the opposite lower side (that is, the side where the intake passage 21 is closed).
  • the Y direction is a direction orthogonal to the X direction and the Z direction, the Y1 side is the right front side in FIG. 1, and the Y2 side is the left back side.
  • FIG. 1 is a perspective view showing the configuration of the throttle body 10.
  • FIG. 2 is a perspective view showing a half cross-sectional state of the configuration of the throttle body 10.
  • the throttle body 10 has a body portion 20 and a movable venturi portion 40.
  • the entire body portion 20 is integrally molded from, for example, metal or resin.
  • the body portion 20 is provided with an intake passage 21 through which a gas such as air flows.
  • the intake passage 21 is, for example, a pipe having a circular cross section, but may have a cross section other than a circle.
  • a throttle valve 30 as a first valve in the scope of claims is arranged via a rotary shaft 31.
  • the throttle valve 30 is provided in a disk shape having a diameter slightly smaller than the diameter of the intake passage 21.
  • the throttle valve 30 is a butterfly type in the present embodiment, and rotates (position changes) about the rotation shaft 31 in conjunction with an operation of an accelerator pedal (not shown). With this rotation, the throttle valve 30 changes the flow passage cross-sectional area of the portion of the intake passage 21 where the throttle valve 30 is located, and adjusts the gas flow rate.
  • the slide valve 50 as the second valve in the claims is located in the intake passage 21 on the downstream side (X1 side) of the throttle valve 30.
  • the slide valve 50 is a main component of the movable venturi unit 40, and slides in the vertical direction (Z direction) so as to protrude and retract with respect to the intake passage 21 (changes in position), whereby the flow path of the intake passage 21. Change the cross-sectional area. Therefore, in the throttle state of the slide valve 50, the negative pressure in the vicinity of the slide valve 50 in the intake passage 21 is increased.
  • FIG. 3 is a perspective view showing the configuration of the slide valve 50 together with the throttle valve 30.
  • the slide valve 50 is provided in a rectangular box-shaped cylindrical body, and a semicircular gap (referred to as a semicircular portion 53) is provided on the lower side (Z2 side). Is provided. That is, on the lower end side (Z2 side) of the slide valve 50, there is a pair of bottom wall portions 51 that abut against a locking bottom wall 614 described later, and a wall surface portion 52 between the pair of bottom wall portions 51 is , Curved upwards (depressed upwards). Thereby, a semicircular portion 53 is formed on the outer surface side of the wall surface portion 52 so that gas can be circulated even when the slide valve 50 is located at the lowest position (the narrowest state).
  • the front shape of the semicircular portion 53 is a semicircular shape.
  • both end sides in the X direction have a large channel cross-sectional area, but the channel cross-sectional area is gradually decreased from the both end sides toward the center side in the X direction. ing.
  • FIG. 4 is a perspective view showing a half cross-sectional state of the configuration of the slide valve 50 and the storage housing 60.
  • FIG. 5 is a perspective view showing a half cross-sectional state of the storage housing 60.
  • FIG. 6 is a cross-sectional view showing the throttle body 10 as viewed from the back in front (viewed from the X1 side to the X2 side), and is a view showing a cross section slightly closer to the X1 side than the protruding member 90.
  • a link mechanism 70 described later and a part of the protruding member 90 are also shown.
  • a protruding member 90 is also shown.
  • a link attachment portion 56 is provided on the lower side of the inner cylinder portion of the slide valve 50.
  • the link attachment portion 56 is a portion to which a joint 81 on the other end side of a fifth link 75 described later is attached in a rotatable state.
  • the slide valve 50 is housed in the housing housing 60, and the housing housing 60 is fixed to the X1 side of the body portion 20 via screws or the like.
  • the storage housing 60 is provided with a slide storage portion 61 and a link storage portion 62, and the upper portion is closed with a lid member 63.
  • the slide storage portion 61 is a portion that stores the slide valve 50 so as to be slidable in the vertical direction (Z direction).
  • the upper side (Z1 side) of the slide storage unit 61 is provided in a rectangular tube shape. However, a communication hole 611 passing through the outer wall of the slide storage portion 61 is provided on the lower side (Z2 side) of the slide storage portion 61 along the X direction.
  • the slide storage portion 61 stores the slide valve 50 for closing the intake passage 21, and the width (dimension in the Y direction) of the slide valve 50 is approximately the same as the diameter of the intake passage 21. Or slightly larger.
  • the lower side (Z2 side) of the slide storage unit 61 is curved and protrudes from the upper side (Z1 side).
  • part located below the slide valve 50 among the inner cylinder parts 612 is a part through which gas distribute
  • the above-described slide valve 50 can be regarded as a configuration that appears and disappears with respect to the intake passage 21.
  • the cylindrical inner cylinder part 612 of the slide storage part 61 is provided slightly larger than the slide valve 50, the dimensional difference between the inner cylinder part 612 and the slide valve 50 is such that the slide valve 50 does not rattle. It has become.
  • the slide storage portion 61 is provided wider than the link storage portion 62 (the dimension in the Y direction is larger), and both ends of the slide storage portion 61 in the Y direction are provided. It protrudes from the link storage part 62.
  • the slide storage portion 61 can cause the portion protruding from the link storage portion 62 to function as a groove portion that supports the slide of the slide valve 50.
  • a portion functioning as the groove portion is referred to as a sliding groove portion 613.
  • the sliding groove portion 613 is linearly provided in the vertical direction (Z direction) so that the width dimension (dimension in the Y direction) is constant also on the communication hole 611 side. .
  • the lower side (Z2 side) of the sliding groove 613 is positioned above the lower side (Z1 side) of the inner peripheral wall of the intake passage 21. That is, a locking bottom wall 614 for receiving the slide valve 50 is provided on the lower end side of the sliding groove 613, and the locking bottom wall 614 is higher than the lower side of the inner peripheral wall of the intake passage 21.
  • a gas flow passage (gap passage) other than the semicircular portion 53 is provided between the wall surface portion 52 of the slide valve 50 and the inner wall surface of the intake passage 21. 54).
  • a venturi portion 55 when referring to a gas flow passage including the semicircular portion 53 and the gap passage 54, it is referred to as a venturi portion 55.
  • the link storage unit 62 is a part that stores a part of the link mechanism 70 described later.
  • the link storage unit 62 is located on the X2 side with respect to the slide storage unit 61. Further, the inner cylinder part 621 of the link storage part 62 communicates with the inner cylinder part 612 of the slide storage part 61.
  • a hole-shaped shaft support portion 622 (see FIG. 1) for supporting a connecting shaft, which will be described later, is provided on the wall surface on the Y1 side of the link storage portion 62. Further, the wall surface on the Y2 side of the link storage portion 62 is provided with a concave shaft support portion 623 (see FIG. 5) that supports the end portion on the Y2 side of the connecting shaft.
  • the shaft support 623 is provided in a recess having a circular cross section. The two shaft support portions 622 and 623 are located on the same axis line in the Y direction.
  • the throttle valve 30 is provided so as to be capable of interlocking with the slide valve 50 via a link mechanism 70 serving as a hook interlocking means in the claims.
  • the slide valve 50 does not move from the time when the throttle valve 30 is most closed (the throttle is closed) without stepping on the accelerator pedal until a certain degree of opening (first opening). Maintain the most closed state (the slide closed state).
  • the slide valve 50 is also moved in the opening direction in synchronization.
  • the link mechanism 70 of the present embodiment has a total of five links 71 to 75.
  • the first link 71, the second link 72, the third link 73, the fourth link 74, and the fifth link 75 are directed from the rotary shaft 31 toward the slide valve 50.
  • Each link 71 to 75 corresponds to the interlocking unit in the claims.
  • the number of links constituting the link mechanism 70 may be any number as long as the above-described interlocking of the throttle valve 30 and the slide valve 50 can be realized, and other members may be appropriately combined. Below, the link mechanism 70 of this Embodiment is demonstrated concretely.
  • the first link 71 is fixed to the fixed pin portion 31 a of the rotating shaft 31, and the first link 71 rotates together with the rotating shaft 31.
  • a second link 72 is connected to the first link 71 via a joint 76.
  • a long hole portion 72a corresponding to the saddle clearance portion in the claims is provided on one end side of the second link 72, and the joint 76 fixedly provided on the first link 71 is movable. Is inserted into the long hole portion 72a.
  • the joint 76 may rotate with respect to the 1st link 71, a slide is impossible.
  • the other end side of the second link 72 is connected to one end side of the third link 73 via the joint 77, and the other end side of the third link 73 is rotatable to the pin portion 78 a of the connecting shaft 78. It is connected to.
  • the end of the connecting shaft 78 on the Y2 side is rotatably supported by the shaft supporting portion 623, and the connecting shaft 78 is rotatable to the shaft supporting portion 622 via the bearing 79 on the Y1 side of the shaft supporting portion 623. It is supported by.
  • the fourth link 74 is rotatably supported on the outer periphery of the connecting shaft 78 near the other end (close to Y2). That is, the fourth link 74 is connected to the third link 73 via the connecting shaft 78.
  • the fourth link 74 is curved to prevent interference with the bottom of the link storage portion 62. However, even if the fourth link 74 is not curved, if it does not interfere with the bottom of the link storage portion 62, or if interference does not cause a problem, it may be linear as with the other links 71 to 73, 75. good.
  • the other end side of the fourth link 74 is connected to one end side of the fifth link 75 via the joint 80, and the other end side of the fifth link 75 is connected to the link mounting portion 56 of the slide valve 50 with the joint 81. Is attached through.
  • an urging spring 82 corresponding to the urging means in the claims is provided.
  • the urging spring 82 applies an urging force toward which the slide valve 50 moves downward (Z2 side).
  • the urging spring 82 is a torsion coil spring, but other springs may be used.
  • One end portion 82a of the biasing spring 82 abuts on the inner wall of the link storage portion 62, and the other end portion 82b differs from the other portions of the biasing spring 82 while being bent along the Y direction.
  • 74 abuts on the upper side.
  • the biasing spring 82 applies a biasing force that pushes the slide valve 50 downward via the fourth link 74 and the fifth link 75.
  • a projecting member 90 is provided on the lower side of the intake passage 21 on the slide accommodating portion 61 side.
  • the protruding member 90 protrudes upward (Z1 side) in the intake passage 21.
  • the wall surface portion 91 on the upstream side (X2 side) of the intake passage 21 in the projecting member 90 is provided at an angle that is perpendicular to or close to perpendicular to the flow path direction (X direction).
  • an inclined portion 92 is provided so as to gradually go downward from the top portion 91a.
  • the inclined part 92 is provided with a negative pressure outlet 93.
  • the negative pressure outlet 93 is an outlet portion of a pipe line 94 that penetrates the protruding member 90 in the vertical direction (Z direction).
  • the wall surface part 91 inclines from the direction perpendicular
  • the protruding member 90 having the wall surface portion 91 is provided in the venturi portion 55 having a narrow channel cross-sectional area, and the negative pressure outlet 93 is provided in the inclined portion 92 on the downstream side (X1 side) from the wall surface portion 91.
  • the negative pressure at the negative pressure outlet 93 can be increased.
  • gases and liquids such as EGR gas can be injected from the negative pressure outlet 93 into the intake passage 21 by using the negative pressure generated in the vicinity of the negative pressure outlet 93.
  • the negative pressure used for various actuators can be supplied.
  • the configuration in which the fixed venturi portion is provided has a problem that the pressure loss increases when the throttle valve 30 rotates in the opening direction and the gas flow rate increases. Therefore, if the opening diameter of the fixed venturi is increased in order to reduce the pressure loss, there is a problem that a sufficient negative pressure cannot be obtained at the fixed venturi.
  • a slide valve 50 is provided in place of the fixed venturi portion in the portion where the fixed venturi portion of Patent Document 1 is provided.
  • the slide of the slide valve 50 is interlocked with the movement for adjusting the opening degree of the throttle valve 30.
  • the rotary shaft 31 rotates in conjunction with the movement, and the first link 71 also rotates. Move.
  • the joint 76 located on the other end side of the first link 71 enters the long hole portion 72a on the one end side of the second link 72, it does not move to the end portion 72a1 on the X1 side of the long hole portion 72a. Then, the second link 72 does not rotate. Then, up to the portion where the joint 76 collides with the end portion 72a1, the influence of the pressure loss generated in the throttle valve 30 is large, and even if the slide valve 50 does not exist, the pressure loss does not change so much. Yes.
  • the opening degree of the throttle valve 30 further increases after the joint 76 collides with the end portion 72 a 1
  • the slide valve 50 is more than the pressure loss at the throttle valve 30.
  • the effect of the pressure loss at is increased. That is, when the throttle valve 30 is opened and the flow rate is increased, the pressure loss at the slide valve 50 increases if the slide valve 50 remains closed.
  • the slide valve 50 moves upward (Z1 side) in conjunction with the movement of the throttle valve 30 in the opening direction.
  • the sliding amount of the slide valve 50 is set to such a degree that a large negative pressure can be secured while sliding so as not to increase the pressure loss with respect to the rotation of the throttle valve 30 in the opening direction.
  • the slide valve 50 is also positioned on the uppermost side (Z1 side).
  • FIG. 7 shows a pressure loss with respect to an increase in the gas flow rate when the opening of the throttle valve 30 is changed, and a position away from the throttle valve 30 by a distance corresponding to the slide valve 50 in the flow path direction (negative pressure measurement position). It is the figure which showed the relationship of the negative pressure in () in the graph.
  • the vertical axis represents the pressure value, and in the region where the pressure is higher than 0 (Pa), the pressure value of the pressure loss is shown, and the region where the pressure is lower than 0 (Pa). The negative pressure value is shown.
  • the horizontal axis represents the gas flow rate.
  • FIG. 7 shows a case where the opening degree of the throttle valve 30 is 15 degrees (left side) and 30 degrees (right side).
  • the case where the slide valve 50 is provided in addition to the throttle valve 30 clearly increases compared to the case where only the throttle valve 30 is provided. Specifically, when the opening degree of the throttle valve 30 is 15 degrees, the negative pressure increases by 22%, and when the opening degree of the throttle valve 30 is 30 degrees, the negative pressure increases by 24%. ing.
  • the slide valve 50 interlocking with the opening operation of the throttle valve 30 is provided, so that the negative pressure is increased while suppressing an increase in pressure loss.
  • a protruding member 90 is also provided. Therefore, the negative pressure can be further increased at the negative pressure outlet 93 on the downstream side of the wall surface portion 91 in the venturi portion 55 in which the flow path is narrowed.
  • the projecting member 90 exists even when the slide valve 50 moves upward (Z1 side) as the throttle valve 30 is greatly opened, thereby reducing the negative pressure at the venturi 55.
  • the negative pressure at the negative pressure outlet 93 can be increased.
  • FIG. 8 is a graph showing how the negative pressure at the negative pressure outlet 93 is increased due to the presence of the protruding member 90.
  • the broken line indicates a case where the protruding member 90 is not present, and the solid line indicates a case where the protruding member 90 is present.
  • FIG. 8 is a plot of negative pressure at the same air amount when the throttle valve 30 has an opening of 15 degrees, the opening of 30 degrees, and the throttle valve 30 is fully open.
  • the pressure at the negative pressure outlet 93 is increased when the protruding member 90 is present, compared with the case where the protruding member 90 is not present.
  • the slide of the slide valve 50 is interlocked with the adjustment of the opening degree of the throttle valve 30, and the negative pressure in the venturi portion 55 is increased while suppressing an increase in pressure loss. .
  • the slide valve 50 is provided in addition to the throttle valve 30.
  • the slide valve 50 flows in the intake passage 21 by a position change of sliding in the vertical direction.
  • the road cross-sectional area is changed. Therefore, as compared with the case where only the throttle valve 30 is present and the slide valve 50 is not present, the negative pressure at a site away from the throttle valve 30 by a distance corresponding to the venturi portion 55 is located downstream (X1 side). It becomes possible to raise.
  • the link mechanism 70 is provided so that the rotation of the throttle valve 30 and the slide valve 50 are synchronized with each other. Due to the presence of the link mechanism 70, the slide valve 50 can be reliably slid in conjunction with the rotation of the throttle valve 30. Further, when the link mechanism 70 is used, there is an advantage that it is easy to assemble, since there is no need for adjustment and the like as compared with the case where other means such as a wire is used.
  • the second link 72 is provided with a long hole portion 72a, and a joint 76 attached to the first link 71 is inserted into the long hole portion 72a.
  • the throttle valve 30 even if the throttle valve 30 is rotated from the most closed state in a direction to gradually open, it can be set to suppress an increase in pressure loss up to the first opening.
  • the slide valve 50 is slid upward (Z1 side) in conjunction with the opening of the throttle valve 30 so that the pressure loss does not increase. .
  • the venturi portion 55 is provided with a protruding member 90 protruding.
  • the projecting member 90 is provided with a wall surface 91 for generating a gas flow that bypasses the projecting member 90, a downstream side of the wall surface 91, and a base side of the projecting member 90 with respect to the top 91 a (Z 2).
  • a negative pressure outlet 93 located on the side).
  • the throttle valve 30 is used as the first valve, and the slide valve 50 is used as the second valve.
  • the slide of the slide valve 50 which forms the venturi part 55 can be efficiently interlocked with the throttle valve 30 interlocked with the operation of the accelerator pedal.
  • the link mechanism 70 is used as the interlocking means, and the second link 72 is provided with a long hole portion 72a, and the long hole portion 72a is attached to the first link 71.
  • the joint 76 is inserted.
  • the slide valve 50 is given a biasing force that always slides downward by the biasing spring 82. For this reason, even if the joint 76 is located in the intermediate part of the long hole part 72a, the state which the slide valve 50 closed most is maintainable.
  • the throttle valve 30 that rotates as the first valve is shown.
  • the first valve is not limited to the rotating valve, and may be another valve.
  • a sliding valve may be used.
  • the slide valve 50 is shown as the second valve.
  • this slide valve 50 may also be one that is added with a rotating operation instead of only a sliding operation.
  • the link mechanism 70 is described as an interlocking unit that interlocks the throttle valve 30 and the slide valve 50.
  • the interlocking means is not limited to the link mechanism 70, and other mechanisms and configurations may be used.
  • a slide of the slide valve 50 may be interlocked with the movement of the throttle valve 30 using a wire and a pulley.
  • the slide of the slide valve 50 may be interlocked with the movement of the throttle valve 30 by a gear mechanism, a cam mechanism, or a combination thereof.
  • the long hole portion 72a as the play portion is described.
  • the play portion is not limited to the long hole portion 72a.
  • a hole shape that does not penetrate may be used.
  • a gap portion such as a long hole portion may be provided in a portion other than the second link 72.
  • Throttle body (corresponding to negative pressure generating device), 20 ... Body portion, 21 ... Intake passage, 30 ... Throttle valve (corresponding to first valve), 31 ... Rotating shaft, 31a ... Fixed pin portion, 40 ... Movable venturi 50, slide valve (corresponding to the second valve), 51 ... bottom wall portion, 52 ... wall surface portion, 53 ... semicircular portion, 54 ... gap passage, 55 ... venturi portion, 56 ... link mounting portion, 60 ... storage Housing 61: Slide storage part 62 ... Link storage part 63 ... Lid member 70 ... Link mechanism (corresponding to interlocking means) 71-75 ... Link (first to fifth links; corresponding to interlocking part), 72a ...

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Lift Valve (AREA)

Abstract

　L'invention concerne un dispositif de génération de pression négative capable de réduire les chutes de pression et aussi d'améliorer la pression négative dans différents degrés d'ouverture d'une valve d'étranglement. Le dispositif de génération de pression négative (10) selon l'invention est capable de produire une pression négative à l'intérieur d'un passage d'admission d'air (21). Le dispositif de génération de pression négative (10) comprend : une première valve (30) se trouvant à l'intérieur du passage d'admission d'air (21), la première valve (30) étant capable de modifier une section transversale de canal en changeant de position ; une deuxième valve (50) se trouvant plus loin en aval que la première valve (30) à l'intérieur du passage d'admission d'air (21), la deuxième valve (50) étant capable de modifier une section transversale de canal en changeant de position ; et un moyen d'interverrouillage (70) qui possède des pièces d'interverrouillage (71-75), le moyen d'interverrouillage (70) provoquant un changement de position de la deuxième valve (50) par le mouvement des pièces d'interverrouillage (71-75) conjointement avec le changement de position de la première valve (30), le moyen d'interverrouillage (70) étant muni d'une pièce de dégagement (72a) qui ne provoque par un changement de position de la deuxième valve (50) vers un premier degré d'ouverture lorsque la section transversale de canal du passage d'admission d'air (21) s'agrandit depuis l'état le plus fermé de la première valve (30).
PCT/JP2014/082866 2013-12-20 2014-12-11 Dispositif de génération de pression négative WO2015093395A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013264232A JP2015121119A (ja) 2013-12-20 2013-12-20 負圧発生装置
JP2013-264232 2013-12-20

Publications (1)

Publication Number Publication Date
WO2015093395A1 true WO2015093395A1 (fr) 2015-06-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020009952A1 (fr) * 2018-07-05 2020-01-09 Fisher Controls International Llc Robinet à soupape axiale rotatif

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53125527A (en) * 1977-02-23 1978-11-01 Smith Mervyn Noel Carburetor unit for internal combustion engine
JPS5725136U (fr) * 1980-07-18 1982-02-09
JPS63295825A (ja) * 1987-05-25 1988-12-02 Hitachi Ltd エンジンの吸入空気量制御装置
JPH0628233U (ja) * 1992-09-09 1994-04-15 株式会社ミクニ エンジン吸気量制御装置
JPH10252563A (ja) * 1997-03-13 1998-09-22 Teikei Kikaki Kk 可変ベンチュリ式気化器
JP2000329010A (ja) * 1999-05-19 2000-11-28 Toyota Motor Corp 内燃機関の排気ガス再循環装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53125527A (en) * 1977-02-23 1978-11-01 Smith Mervyn Noel Carburetor unit for internal combustion engine
JPS5725136U (fr) * 1980-07-18 1982-02-09
JPS63295825A (ja) * 1987-05-25 1988-12-02 Hitachi Ltd エンジンの吸入空気量制御装置
JPH0628233U (ja) * 1992-09-09 1994-04-15 株式会社ミクニ エンジン吸気量制御装置
JPH10252563A (ja) * 1997-03-13 1998-09-22 Teikei Kikaki Kk 可変ベンチュリ式気化器
JP2000329010A (ja) * 1999-05-19 2000-11-28 Toyota Motor Corp 内燃機関の排気ガス再循環装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020009952A1 (fr) * 2018-07-05 2020-01-09 Fisher Controls International Llc Robinet à soupape axiale rotatif
CN110686122A (zh) * 2018-07-05 2020-01-14 费希尔控制产品国际有限公司 旋转轴向截止阀
US10962122B2 (en) 2018-07-05 2021-03-30 Fisher Controls International Llc Rotary axial globe valve
CN110686122B (zh) * 2018-07-05 2023-11-28 费希尔控制产品国际有限公司 旋转轴向截止阀

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