WO2009116380A1 - 油圧サーボ駆動装置、およびこれを用いた可変ターボ過給機 - Google Patents
油圧サーボ駆動装置、およびこれを用いた可変ターボ過給機 Download PDFInfo
- Publication number
- WO2009116380A1 WO2009116380A1 PCT/JP2009/053806 JP2009053806W WO2009116380A1 WO 2009116380 A1 WO2009116380 A1 WO 2009116380A1 JP 2009053806 W JP2009053806 W JP 2009053806W WO 2009116380 A1 WO2009116380 A1 WO 2009116380A1
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- WIPO (PCT)
- Prior art keywords
- drive device
- piston
- oil passage
- oil
- hydraulic
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
- F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
- F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
- F15B9/12—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor in which both the controlling element and the servomotor control the same member influencing a fluid passage and are connected to that member by means of a differential gearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
- F01D17/143—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path the shiftable member being a wall, or part thereof of a radial diffuser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
- F01D17/167—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes of vanes moving in translation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/24—Control of the pumps by using pumps or turbines with adjustable guide vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/40—Application in turbochargers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/40—Transmission of power
- F05D2260/406—Transmission of power through hydraulic systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B2013/0409—Position sensing or feedback of the valve member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/62—Cooling or heating means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to a hydraulic servo drive device and a variable turbocharger using the same.
- variable turbocharger that can adjust an opening area of a nozzle portion for ejecting exhaust gas to an exhaust turbine.
- the opening area can be reduced by narrowing the gap between the exhaust introduction walls forming the nozzle portion. Since the flow velocity of the exhaust gas flowing into the exhaust turbine increases, the rotational energy of the turbine increases, and the supercharging capability of the supply air compressor can be increased.
- a slide mechanism is adopted in which one of the exhaust introduction walls is slid toward the other, and it is proposed that the slide mechanism is driven by a hydraulic servo drive device.
- a hydraulic servo drive device a hydraulic servo piston is used, and by switching the pressure oil supply to the hydraulic chambers on both sides of the servo piston, the servo piston is reciprocated, and the reciprocating motion is transmitted to the slide mechanism.
- the opening degree can be controlled.
- Patent Document 1 when a stroke sensor or the like is attached to a hydraulic servo drive device provided in the variable turbocharger, the turbine becomes hot, so that the stroke sensor or the like that is vulnerable to heat is detected from the turbine. May be damaged by heat. Therefore, it is known to cool a stroke sensor or the like by providing a cooling passage and a gap exclusively as in a hydraulic servo drive device provided in an EGR (Exhaust Gas Recirculation) valve device of an exhaust gas recirculation device. (Patent Documents 2 to 4).
- EGR exhaust Gas Recirculation
- Patent Documents 2 to 4 it is necessary to provide a dedicated cooling water circulation oil passage for cooling the stroke sensor in the hydraulic servo drive device or a dedicated air gap for taking in cooling air.
- the device structure may be complicated and the manufacturing cost may increase.
- the structure for taking in air in the gap also has a problem that cooling efficiency is extremely deteriorated in a place where the air to be taken in becomes high temperature, so that it cannot be adopted.
- An object of the present invention is to provide a hydraulic servo drive device that can be cooled by circulating oil in a heat-sensitive part such as a stroke sensor without providing a dedicated oil path for circulating cooling water, and a variable using the same It is to provide a turbocharger.
- the hydraulic servo drive device of the present invention includes a pilot spool that slides by pilot pressure and switches between supply and shutoff of oil, an urging means that urges the pilot spool, and a servo that slides following the pilot spool.
- a piston, detection means for detecting the movement amount of the servo piston, a pump hydraulic chamber into which oil for moving the servo piston flows, a pump port to which oil from a pump is supplied, the pump port, A piston oil passage that communicates with the pump hydraulic chamber and a discharge circulation oil passage that communicates between the pump hydraulic chamber and the drain port are provided.
- the pump port and the drain port communicate with each other at least when the pilot spool and the servo piston are in balance.
- the piston oil passage and the discharge circulation oil passage are provided in the servo piston.
- the hydraulic servo drive device of the present invention includes a housing that accommodates the servo piston, and the detection means moves together with the servo piston by being provided at a stator provided at the housing and an end of the servo piston.
- the pump hydraulic chamber is formed in the housing between the mover provided in the servo piston and the stator provided in the housing, and is arranged inside the servo piston. Is formed with a center hole that penetrates along the sliding direction and accommodates the pilot spool, and the pilot hydraulic pressure chamber on which the pilot pressure acts is located within the center hole of the servo piston, at the end of the pilot spool. Desirably formed between the movable portion and the mover provided on the servo piston. There.
- the piston oil passage for allowing oil to flow into the pump hydraulic chamber and the discharge circulation oil passage for discharging the oil in the pump hydraulic chamber are provided, so that the hydraulic pressure of the pump hydraulic chamber is maintained.
- the oil from the pump port is circulated through the pump hydraulic chamber by being discharged from the discharge circulation oil passage while being supplied to the pump hydraulic chamber via the piston oil passage.
- variable turbocharger is the variable turbocharger in the circumferential direction of the turbine wheel between the exhaust introduction wall provided opposite to the nozzle portion outside the turbine wheel and the exhaust introduction wall.
- the oil for driving the hydraulic servo drive device is lubricating oil for an engine in which the hydraulic servo drive device is mounted.
- variable turbocharger of the present invention it is preferable that the lubricating oil is boosted and supplied to the hydraulic servo drive device.
- a separate hydraulic power source is not required by boosting the engine lubricating oil with, for example, a booster pump, so that the manufacturing cost can be reduced.
- the pump discharge pressure that has been increased can be used as the original pressure of the proportional control valve. For example, by supplying a predetermined current to the proportional control valve, a pilot pressure corresponding to the current is generated, and the pilot spool can be moved to a position corresponding to the pilot pressure.
- FIG. 2 is a cross-sectional view showing the hydraulic servo drive device according to the first embodiment of the present invention, and is a view taken along the line AA in FIG.
- FIG. 2 is a cross-sectional view showing the hydraulic servo drive device, as seen from the direction of arrows BB in FIG.
- mold servo valve Schematic diagram showing the engine lubrication circuit Sectional drawing which shows the hydraulic servo drive device which concerns on 2nd Embodiment of this invention.
- FIG. 1 is a perspective view of a variable turbocharger 1 in which a hydraulic servo drive device 10 according to this embodiment of the present invention is used
- FIG. 2 is a cross-sectional view of the variable turbocharger 1.
- the variable turbocharger 1 includes a turbine 2 on the right side in the drawing, a compressor 3 on the left side, and a hydraulic servo drive device 10 between the turbine 2 and the compressor 3. It is a structure and is attached to the engine main body which is not shown in figure.
- a turbine wheel 5 is accommodated in the turbine housing 4 on the turbine 2 side, and a compressor impeller 7 is accommodated in the compressor housing 6 on the compressor 3 side.
- a shaft 8 is provided integrally with the turbine wheel 5, and a compressor impeller 7 is attached to the tip of the shaft 8.
- the shaft 8 is rotatably supported by the center housing 9. Therefore, the rotation of the turbine wheel 5 rotated by the exhaust gas is transmitted to the compressor impeller 7 via the shaft 8, and the intake air is compressed and supercharged by the rotation of the compressor impeller 7.
- the turbine housing 4 is provided with a volute-shaped exhaust introduction path 81 for introducing exhaust gas from the engine body.
- a nozzle portion 82 for ejecting exhaust gas to the turbine wheel 5 side is continuously provided in the circumferential direction, and the exhaust gas ejected from the nozzle portion 82 rotates the turbine wheel 5.
- the exhaust is later exhausted from the exhaust outlet 83.
- the nozzle portion 82 is formed by a pair of exhaust introduction walls 84 and 85 facing each other.
- One exhaust introduction wall 84 is formed by a side surface 87 of a movable ring 86 having a U-shaped cross section.
- the movable ring 86 is housed in an annular housing space 88 provided in the center housing 9.
- a plurality of nozzle vanes 89 projecting toward the other exhaust introduction wall 85 side are attached to the side surface 87 of the movable ring 86 at equal circumferential intervals.
- the exhaust introduction wall 85 is provided with a recess 90 that is continuous in the circumferential direction, and the front end side of each nozzle vane 89 is accommodated in the recess 90.
- the movable ring 86 is moved forward and backward by a slide mechanism 50 described later, whereby the exhaust introduction wall 84 is moved closer to and away from the exhaust introduction wall 85 and the opening area of the nozzle portion 82 is changed.
- the slide mechanism 50 has a structure in which the above-described movable ring 86 is advanced and retracted by rotationally driving the drive shaft 21 inserted through the lower side of the center housing 9.
- 3 and 4 show the main part of such a slide mechanism 50.
- FIG. 3 and 4 a pair of arms 22, 22 extending in an arc shape upward is fixed at an intermediate position of the drive shaft 21.
- a pin 23 protruding outward in the horizontal direction is attached to the distal end side of each arm 22, and a slider 24 is fitted into the pin 23.
- the slider 24 is slidably fitted in the sliding groove 26 on the base end side of the support rod 25 parallel to the shaft 8 described above.
- the tip of the support rod 25 is joined to the back side of the movable ring 86.
- the arm 22 swings along the axial direction of the shaft 8, so that the support rod 25 moves and moves the movable ring 86, and one exhaust introduction wall 84 moves to the other exhaust. It advances and retreats with respect to the introduction wall 85.
- the support rod 25 having the arm 22, the pin 23, the slider 24, and the sliding groove 26 converts the rotational movement of the drive shaft 21 into the forward / backward movement of the exhaust introduction wall 84.
- FIG. 5 is a perspective view showing a connecting portion 31 between the slide mechanism 50 and the hydraulic servo drive device 10.
- 6 is an AA arrow view of FIG. 1
- FIG. 7 is an BB arrow view of FIG.
- FIG. 8 is a hydraulic circuit diagram of the hydraulic servo drive device 10.
- the hydraulic servo drive device 10 will be described with reference to FIGS.
- the hydraulic servo drive device 10 in this embodiment uses a 6-port 3-position servo valve.
- the hydraulic servo drive device 10 basically has a structure for rotating the drive shaft 21 by moving the servo piston 11 up and down.
- the outer periphery of the servo piston 11 is provided with a sliding groove 17 orthogonal to the axial direction, and the arm 27 on the drive shaft 21 side is provided with a pin 28 protruding toward the sliding groove 17 side.
- a slider 29 is fitted into the pin 28, and the slider 24 is slidably fitted into the sliding groove 17.
- another conversion means that includes the sliding groove 17, the slider 29, the pin 28, and the arm 27 and that converts the advance / retreat movement of the servo piston 11 into the rotation movement of the drive shaft 21 is configured.
- the slider 29 moves up and down along with it, and slides along the sliding groove 17.
- the movement of the slider 29 and the rotation of the pin 28 allow the arm 27 to move in a circular arc.
- the arm 27 can be rotated.
- the slide mechanism 50 is driven as described above, and the nozzle opening degree of the variable turbocharger 1 is adjusted.
- the hydraulic servo drive device 10 includes a substantially cylindrical housing 12 and is attached to the variable turbocharger 1 via an O-ring 100 that seals around an opening 12 ⁇ / b> A provided in the housing 12. It is done.
- a cylindrical cylinder chamber 13 penetrating vertically Inside the housing 12, a cylindrical cylinder chamber 13 penetrating vertically is provided.
- the cylinder chamber 13 accommodates a servo piston 11 that slides in the penetrating direction.
- a cylindrical closing member 14 is attached to the upper end portion of the cylinder chamber 13 in the figure via an O-ring 101, and the inner peripheral portion of the closing member 14 is a detection means via O-rings 102 and 103.
- the stroke sensor 15 is attached, and the upper end portion of the cylinder chamber 13 is sealed by the stroke sensor 15. Further, the lower end portion of the cylinder chamber 13 in the drawing is sealed by the closing member 16 via the O-ring 104.
- the opening part 12A which connects the inside and the outside is provided in the side part of the housing 12.
- a connecting portion 31 between the drive shaft 21 and the servo piston 11 is provided at a position corresponding to the opening 12A.
- pilot port 41 for supplying pilot pressure
- pump port 42 for supplying oil from the pump 122 (FIG. 8)
- drain port 43 for returning oil. Is provided.
- Openings 11A and 11B are provided at both ends of the servo piston 11 accommodated in the cylinder chamber 13 from above in the figure, and a center hole that penetrates along the sliding direction in the servo piston 11. 111 is provided.
- the attachment member 18 to which the movable element 15A of the stroke sensor 15 is attached is screwed into the opening 11A of the servo piston 11.
- a first hydraulic chamber 51 as a pump hydraulic chamber is formed between the mounting member 18 and a cap member 151 on the side of the stator 15B such as a Hall IC.
- the stator 15 ⁇ / b> B detects the magnetic field of the mover 15 ⁇ / b> A that moves up and down according to the operation of the servo piston 11. Therefore, the mover 15 ⁇ / b> A moves together with the servo piston 11, and can sense the movement amount of the servo piston 11 and finally the nozzle opening in the variable turbocharger 1.
- a base member 19 fixed to the end of the cylinder chamber 13 is attached to the lower opening 11B in the drawing.
- the servo piston 11 slides in the cylinder chamber 13 with respect to the base member 19.
- a second hydraulic chamber 52 is formed between the seat 191 of the pedestal member 19 and the lower end surface 112 of the servo piston 11, and the spring 30 is held therebetween.
- the servo piston 11 is urged by the spring 30 in a direction away from the base member 19.
- the spring 30 is for urging the servo piston 11 to the upper position in the figure when the oil supply is cut off for some reason.
- the pilot spool 20 is slidably disposed in the center hole 111.
- a pilot hydraulic chamber 53 is formed between the lower end surface of the mounting member 18 and the upper end surface of the pilot spool 20, and the pilot hydraulic chamber 53 and a pilot port 41 provided in the housing 12 Are always in communication via the servo oil passage 60 of the servo piston 11.
- the pilot spool 20 slides in the center hole 111 by the pilot pressure supplied to and discharged from the pilot port 41 to the pilot hydraulic chamber 53.
- a pressure oil passage 61 that allows the center hole 111 and the pump port 42 of the housing 12 to communicate with each other is formed in the radial direction at a substantially center in the sliding direction. Thereby, the oil from the pump 122 flows into the center hole 111.
- the outer side of the pressure oil passage 61 opens into a wide shallow groove 62 formed in the shape of a long hole in the outer periphery of the servo piston 11, and the shallow groove 62 has a predetermined vertical dimension.
- the pressure oil passage 61 and the pump port 42 are always in communication. Further, the inside of the pressure oil passage 61 opens into a groove portion 201 formed along the sliding direction on the outer periphery of the pilot spool 20.
- the servo piston 11 is provided with a return oil passage 63 that connects the center hole 111 and the drain port 43 of the housing 12 to return the oil in the center hole 111 to the oil pan 121 (FIG. 8).
- a return oil passage 63 that connects the center hole 111 and the drain port 43 of the housing 12 to return the oil in the center hole 111 to the oil pan 121 (FIG. 8).
- an opening is formed in a shallow groove 64 formed on the outer periphery of the servo piston 11 and formed in an annular shape in the housing 12, and the return oil passage 63 and the drain port 43 are within the stroke of the servo piston 11. And always communicate.
- a first piston oil passage 65 as a piston oil passage for communicating the center hole 111 and the upper first hydraulic chamber 51 and a discharge circulation oil passage 66 are provided. It has been. Further, a second piston oil passage 67 is provided for communicating the center hole 111 and the second hydraulic chamber 52.
- An oil passage 661 is provided.
- the oil passage 651 of the first piston oil passage 65 is positioned below the pressure oil passage 61 (FIG. 6), and the second oil passage 661 of the discharge circulation oil passage 66 is more illustrated than the pressure oil passage 61. Located above and inside. A communication portion 671 with the center hole 111 provided on the upper end side of the second piston oil passage 67 is located between the oil passages 651 and 661.
- the pilot spool 20 includes first to third spool lands 71, 72, 73 on the outer periphery in order from the lower side in the figure.
- a return oil passage 68 that opens downward in the figure is provided inside the pilot spool 20, and the groove 69 provided between the second and third spool lands 72 and 73 communicates with the return oil passage 68. is doing. Further, since the lower side of the return oil passage 68 is opened, the return oil passage 68, the return oil passage 63, and the drain port 43 communicate with each other.
- the relationship between the oil passages 651 and 661 of the servo piston 11 and the grooves 69 and 201 of the pilot spool 20 is set as follows. That is, when the oil passage 651 of the first piston oil passage 65 is minutely communicated with the groove portion 201 of the pilot spool 20, the oil passage 661 of the discharge circulation oil passage 66 is minutely communicated with the groove portion 69 of the pilot spool 20. It is set to do. According to this, since the oil supplied from the first piston oil passage 65 to the first hydraulic chamber 51 passes through the discharge circulation oil passage 66 and is drained to the return oil passage 68 of the pilot spool 20, the stroke sensor 15. It will be circulated around.
- a spring 40 as an urging means is interposed between the lower end surface 203 of the pilot spool 20 and the seat 192 of the base member 19, and the pilot spool 20 is separated from the base member 19 by the spring 40. It is energized in the direction to do. Due to the pilot pressure in the pilot hydraulic chamber 53, the pilot spool 20 moves downward against the biasing force of the spring 40. Alternatively, the pilot spool 20 moves upward by the biasing force.
- FIG. 7 shows a state where the servo piston 11 and the pilot spool 20 are balanced (neutral state).
- the “balanced state” means that the force acting on the pilot spool 20 by the pilot pressure in the pilot hydraulic chamber 53 and the urging force of the spring 40 are balanced and act on the first hydraulic chamber 51.
- the force that lowers the servo piston 11 due to pressure and the force due to the pressure acting on the second hydraulic chamber 52 and the force that raises the servo piston 11 due to the resultant force of the spring 30 are balanced.
- the pilot spool 20 is configured by an underlap in which the oil passage 651 and the groove portion 201 communicate with each other, and the oil passage 661 and the groove portion 69 communicate with each other.
- external force acts on the servo piston 11 from the drive shaft 21, it has almost no effect.
- the oil passage 651 of the first piston oil passage 65 is in minute communication with the groove 201 of the pilot spool 20, and the oil from the pump 122 passes through the first piston oil passage 65 through the first hydraulic chamber. 51.
- the oil passage 661 of the discharge circulation oil passage 66 and the groove 69 of the pilot spool 20 are minutely communicated and supplied into the first hydraulic chamber 51.
- a small amount of oil is drained to the return oil passage 63 through the return oil passage 68. Accordingly, in this balanced state, oil always circulates in the first hydraulic chamber 51, and the periphery of the stroke sensor 15 can be cooled by the flow of oil used to move the servo piston 11, and the stroke sensor 15 It can prevent high temperature.
- the pilot spool 20 When the pilot spool 20 is lowered from the balanced state shown in FIG. 7, the pilot spool 20 is lowered against the biasing force of the spring 40 by increasing the pilot pressure in the pilot hydraulic chamber 53. .
- the opening degree of communication between the oil passage 651 of the first piston oil passage 65 and the groove portion 201 of the pilot spool 20 increases, so that the oil supplied from the pump 122 into the first hydraulic chamber 51 is increased.
- the flow rate increases.
- the oil is supplied into the first hydraulic chamber 51, and the force that lowers the servo piston 11 due to the pressure acting on the first hydraulic chamber 51 is the force caused by the pressure acting on the second hydraulic chamber 52 and the force caused by the spring 30.
- the resultant force exceeds the force that raises the servo piston 11 upward, the servo piston 11 is lowered.
- the servo piston 11 descends following the pilot spool 20. Then, the pilot spool 20 descends to a position where the pilot pressure and the spring 40 are balanced and stops. During this downward movement, the oil passage 661 of the discharge circulation oil passage 66 is blocked from communicating with the groove 69 of the pilot spool 20.
- the servo piston 11 that has followed the pilot spool 20 has a force that lowers the servo piston 11 due to the pressure acting on the first hydraulic chamber 51 and a force due to the pressure that acts on the second hydraulic chamber 52. It stops in a state in which the force that raises the servo piston 11 upward is balanced by the resultant force of the spring 30.
- the opening area of the oil path 651 and the groove part 201 will decrease, the opening area of the oil path 661 and the groove part 69 will increase.
- the oil supplied into the first hydraulic chamber 51 again decreases, the oil is supplied into the first hydraulic chamber 51, while the return oil passage 68 passes from the discharge circulation oil passage 66 through the groove 69.
- Will be drained from That is, the oil supplied from the first piston oil passage 65 into the first hydraulic chamber 51 is discharged to the discharge circulation oil passage by balancing in the same manner as in the balanced state shown in FIG. 7 before the pilot spool 20 is lowered. Since it is discharged from 66, the periphery of the stroke sensor 15 can be cooled, and the stroke sensor 15 can be prevented from becoming hot.
- the pilot pressure is controlled by the proportional control valve 141.
- the pilot spool 20 When the pilot spool 20 is raised from the balanced state shown in FIG. 7, the pilot pressure in the pilot hydraulic chamber 53 is lowered so that the force due to the pilot pressure acting on the pilot spool 20 causes the biasing force of the spring 40. Since it becomes smaller, the pilot spool 20 is raised. When the pilot spool 20 is raised, the communication between the oil passage 651 of the first piston oil passage 65 and the groove portion 201 of the pilot spool 20 is blocked, and the communication portion 671 of the second piston oil passage 67 and the groove portion 201 communicate with each other. . Thus, the oil from the pump 122 is not supplied to the first hydraulic chamber 51 but is supplied to the second hydraulic chamber 52 via the second piston oil passage 67.
- the oil passage 661 of the exhaust circulation oil passage 66 has a larger opening degree communicating with the groove portion 69, and the oil in the first hydraulic chamber 51 is drained through the return oil passage 68 of the pilot spool 20. .
- the force that lowers the servo piston 11 by the pressure acting on the first hydraulic chamber 51 is lower than the force that raises the servo piston 11 by the resultant force of the pressure acting on the second hydraulic chamber 52 and the force by the spring 30. When it becomes smaller, the servo piston 11 rises.
- the opening area between the oil passage 661 and the groove portion 69 is reduced, and the oil passage 651 and the groove portion 201 are slightly communicated with each other.
- the oil supplied into the first hydraulic chamber 51 increases and the oil is supplied into the first hydraulic chamber 51, while the oil in the first hydraulic chamber 51 passes through the groove 69 and returns oil. Drain from the road 68. That is, since the oil supplied from the first piston oil passage 65 into the first hydraulic chamber 51 is discharged from the discharge circulation oil passage 66, the periphery of the stroke sensor 15 can be cooled, and the stroke sensor 15 is heated. Can be prevented.
- the hydraulic servo drive device 10 is illustrated as a hydraulic circuit diagram as shown in FIG.
- the hydraulic servo drive device 10 includes a servo piston 11, a pilot spool 20, a stroke sensor 15, a pilot port 41, and an oil pan 121, and it is understood that a 6-port 3-position servo valve is configured.
- the oil supplied from the pump 122 is connected to the center upper port and the first piston oil passage 65 at the two positions of the pilot spool 20 and to the center lower port and the pressure oil passage 61. Therefore, the first piston oil passage 65 and the pressure oil passage 61 are communicated, and the oil from the pump 122 is supplied to the first hydraulic chamber 51. Further, since the upper right port and the discharge circulation oil passage 66 are connected, and the lower right port and the return oil passage 68 are connected, the discharge circulation oil passage 66 and the return oil passage 68 are communicated, and the first hydraulic pressure Oil in the chamber 51 is drained to the oil pan 121 via the return oil passage 68.
- the oil from the pump 122 is not supplied to the first hydraulic chamber 51. Furthermore, since the upper right port and the discharge circulation oil passage 66 are connected, and the lower right port and the return oil passage 68 are connected, the discharge circulation oil passage 66 and the return oil passage 68 communicate with each other, and the first hydraulic pressure Oil in the chamber 51 is drained to the oil pan 121 via the return oil passage 68. Then, following the movement of the pilot spool 20, the servo piston 11 moves and stops in a state where the two positions are balanced.
- the lubrication circuit 120 is branched from the main gallery 125, and the injector side circuit 129 that lubricates the cam drive unit and the like in the fuel injector 128, and the transmission mechanism side that lubricates the power transmission mechanism 130 including the timing gear.
- a first drain circuit 135 for returning the lubricating oil from 128 to the oil pan 121 is provided.
- the pressure oil for driving the hydraulic servo drive device 10 is covered by part of the engine lubricating oil, but the circuit for supplying the pressure oil is branched from the front of the main gallery 125.
- This is a pressure oil supply circuit 136.
- a booster pump 138 is provided on the proximal end side of the pressure oil supply circuit 136, and the pressurized pressure oil is supplied to the pump port 42 of the hydraulic servo drive device 10 through the drive pressure circuit 139 on the distal end side.
- FIG. 10 is a diagram showing a hydraulic servo drive device 10 according to the second embodiment of the present invention
- FIG. 11 is a hydraulic circuit diagram of the hydraulic servo drive device 10.
- the hydraulic servo drive device 10 in this embodiment uses a 4-port 3-position servo valve.
- the shape of the servo piston 11 is a shape corresponding to the 4-port 3-position type. That is, in this embodiment, the second piston oil passage 67 (FIG. 7) provided in the first embodiment is not provided, and the second hydraulic chamber 52 (FIG. 7) in the first embodiment is It communicates with the shallow groove 64 on the drain side via the communication path 80, and the movement of the servo piston 11 is not hindered by allowing the oil in the second hydraulic chamber 52 to enter and exit in conjunction with the movement of the servo piston 11. It is like that.
- the pilot pressure in the pilot hydraulic chamber 53 is raised to resist the urging force of the spring 40. 20 is lowered.
- the opening degree of communication between the oil passage 651 of the first piston oil passage 65 and the groove portion 201 of the pilot spool 20 increases, so that the oil supplied from the pump 122 into the first hydraulic chamber 51 is increased.
- the flow rate increases.
- the pilot spool 20 when the pilot spool 20 is raised from the balanced state shown in FIG. 10, the pilot pressure in the pilot hydraulic chamber 53 is reduced, so that the force by the pilot pressure acting on the pilot spool 20 causes the spring 40 to move. Therefore, the pilot spool 20 is raised.
- the pilot spool 20 rises, the communication between the oil passage 651 of the first piston oil passage 65 and the groove 201 of the pilot spool 20 is blocked, and the oil passage 661 and the groove 69 of the discharge circulation oil passage 66 communicate with each other.
- the oil from the pump 122 is not supplied to the first hydraulic chamber 51, and the oil that was in the first hydraulic chamber 51 is drained through the return oil passage 68 of the pilot spool 20.
- the hydraulic servo drive device 10 is illustrated as a hydraulic circuit diagram as shown in FIG.
- the hydraulic servo drive device 10 includes a servo piston 11, a pilot spool 20, a stroke sensor 15, and a pilot port 41, and it can be seen that a 4-port three-position servo valve is configured.
- the oil supplied from the pump 122 is connected to the center upper port and the first piston oil passage 65 at the two positions of the pilot spool 20 and to the center lower port and the pressure oil passage 61. Therefore, the first piston oil passage 65 and the pressure oil passage 61 are communicated, and the oil from the pump 122 is supplied to the first hydraulic chamber 51. Further, since the upper right port and the discharge circulation oil passage 66 are connected, and the lower right port and the return oil passage 68 are connected, the discharge circulation oil passage 66 and the return oil passage 68 are communicated, and the first hydraulic pressure Oil in the chamber 51 is drained to the oil pan 121 via the return oil passage 68.
- FIG. 12 shows a hydraulic servo drive device 10 according to the third embodiment, and the hydraulic servo drive device 10 also uses a 6-port servo valve.
- the groove portion 70 is provided between the first and second spool lands 71 and 72 of the pilot spool 20, and the discharge circulation oil passage 66 communicates with the groove portion 70.
- the first piston oil passage 65 is in minute communication with the groove portion 201 of the pilot spool 20, and the discharge circulation oil passage 66 is in minute communication with the groove portion 70 of the pilot spool 20. Therefore, the same effect as that of the first embodiment can be obtained.
- FIG. 13 shows a hydraulic servo drive device 10 according to the fourth embodiment, and a 4-port servo valve is used for the hydraulic servo drive device 10.
- the exhaust circulation oil passage 66 includes a groove portion 70 positioned between the first hydraulic chamber 51 and the first and second spool lands 71 and 72 as in the third embodiment. Communicate.
- Other configurations are the same as those of the second embodiment, and the same effects as those of the second embodiment can be obtained.
- the first piston oil passage 65 and the groove portion 201 of the pilot spool 20 are set to be in minute communication with each other, and the discharge circulation oil passage 66 and the groove portion 69 or groove portion 70 of the pilot spool 20
- the pilot piston 20 repeats minute vibrations at the time of pilot pressure control, so that the first piston oil passage 65 and the groove portion 201 communicate with each other, and the discharge circulation oil passage 66 and the groove portion 69 or groove portion of the pilot spool 20 70 communicates with each other, so that oil circulates in the first hydraulic chamber 51 little by little.
- variable turbocharger 1 of each of the above embodiments has a structure in which the movable ring 86 is slid by the slide mechanism 50 and the opening area of the nozzle portion 82 is changed.
- a structure in which the opening area is changed by swinging the nozzle vane using a swing mechanism may be used.
- the hydraulic servo drive device 10 is configured to be used in the variable turbocharger 1, but may be used in an EGR valve device.
- the hydraulic servo drive device of the present invention and the variable turbocharger using the same can be suitably used for a variable turbocharger or an EGR valve device.
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Abstract
Description
以下、本発明の第1実施形態を図面に基づいて説明する。
図1は、本発明の本実施形態に係る油圧サーボ駆動装置10が用いられた可変ターボ過給機1の斜視図であり、図2は可変ターボ過給機1の断面図である。
図1,2を参照すると、可変ターボ過給機1は、図中の右側にタービン2と、左側にコンプレッサ3と、このタービン2とコンプレッサ3との間に油圧サーボ駆動装置10とを備えた構成であり、図示しないエンジン本体に取り付けられる。タービン2側のタービンハウジング4内にはタービンホイール5が収容され、コンプレッサ3側のコンプレッサハウジング6内にはコンプレッサインペラ7が収容されている。タービンホイール5にはシャフト8が一体に設けられ、シャフト8の先端にコンプレッサインペラ7が取り付けられている。シャフト8はセンターハウジング9に回転自在に支持されている。このため、排気ガスによって回転するタービンホイール5の回転が、シャフト8を介してコンプレッサインペラ7に伝達され、コンプレッサインペラ7の回転によって吸気が圧縮過給される。
シリンダ室13に収容されたサーボピストン11の両端部には、図中の上方から開口部11A,11Bが設けられているとともに、サーボピストン11内部には、摺動方向に沿って貫通するセンターホール111が設けられている。
このつり合っている状態で油路651と溝部201とが連通し、かつ油路661と溝部69とが連通しているアンダーラップでパイロットスプール20を構成している。なお、駆動シャフト21よりサーボピストン11に外力が作用するが、ほとんど影響はない。
なお、パイロット圧は、比例制御弁141で圧力制御している。
図10は、本発明の第2実施形態に係る油圧サーボ駆動装置10を示す図であり、図11は、油圧サーボ駆動装置10の油圧回路図である。本実施形態での油圧サーボ駆動装置10には、4ポート3位置型サーボバルブが用いられている。
図12には、第3実施形態に係る油圧サーボ駆動装置10が示され、油圧サーボ駆動装置10にも、6ポート式サーボバルブが用いられている。
ただし、本実施形態での油圧サーボ駆動装置10では、パイロットスプール20の第1、第2スプールランド71,72の間に溝部70が設けられ、その溝部70に排出循環油路66が連通している。このような本実施形態においても、第1ピストン油路65がパイロットスプール20の溝部201と微小に連通しているとともに、排出循環油路66がパイロットスプール20の溝部70と微小に連通しているため、第1実施形態と同様の効果を得ることができる。
図13には、第4実施形態に係る油圧サーボ駆動装置10が示され、油圧サーボ駆動装置10には、4ポート式サーボバルブが用いられている。
本実施形態での油圧サーボ駆動装置10では、第3実施形態と同様に排出循環油路66は、第1油圧室51と第1、第2スプールランド71,72の間に位置する溝部70と連通している。他の構成は、第2実施形態と同じであり、第2実施形態と同様の効果を得ることができる。
従って、上記に開示した形状、数量などを限定した記載は、本発明の理解を容易にするために例示的に記載したものであり、本発明を限定するものではないから、それらの形状、数量などの限定の一部もしくは全部の限定を外した部材の名称での記載は、本発明に含まれるものである。
Claims (11)
- パイロット圧によって摺動し、油の供給および遮断を切り換えるパイロットスプールと、
前記パイロットスプールを付勢する付勢手段と、
前記パイロットスプールに追従して摺動するサーボピストンと、
前記サーボピストンの移動量を検出する検出手段と、
前記サーボピストンを移動させるための油が流入するポンプ油圧室と、
ポンプからの油が供給されるポンプポートと、
前記ポンプポートと前記ポンプ油圧室とを連通させるピストン油路と、
前記ポンプ油圧室とドレーンポートとを連通させる排出循環油路とを備えている
ことを特徴とする油圧サーボ駆動装置。 - 請求項1に記載の油圧サーボ駆動装置において、
少なくとも前記パイロットスプールおよび前記サーボピストンがつり合っている状態では、前記ポンプポートと前記ドレーンポートとが連通している
ことを特徴とする油圧サーボ駆動装置。 - 請求項1に記載の油圧サーボ駆動装置において、
前記ピストン油路および前記排出循環油路は、サーボピストンに設けられている
ことを特徴とする油圧サーボ駆動装置。 - 請求項2に記載の油圧サーボ駆動装置において、
前記ピストン油路および前記排出循環油路は、サーボピストンに設けられている
ことを特徴とする油圧サーボ駆動装置。 - 請求項1~請求項4のいずれかに記載の油圧サーボ駆動装置において、
前記サーボピストンを収容するハウジングを備え、
前記検出手段は、前記ハウジングに設けられた固定子と、前記サーボピストンの端部に設けられることで前記サーボピストンと共に移動する可動子とで構成され、
前記ポンプ油圧室は、前記ハウジング内で、前記サーボピストンに設けられた可動子と当該ハウジングに設けられた前記固定子との間に形成され、
前記サーボピストンの内部には、摺動方向に沿って貫通し、かつ前記パイロットスプールを収容するセンターホールが形成され、
前記パイロット圧が作用するパイロット油圧室は、前記サーボピストンのセンターホール内で、前記パイロットスプールの端部と当該サーボピストンに設けられた前記可動子との間に形成されている
ことを特徴とする油圧サーボ駆動装置。 - 可変ターボ過給機において、
タービンホイール外側のノズル部に互いに対向して設けられた排気導入壁と、
前記排気導入壁の間で前記タービンホイールの周方向に沿って所定間隔をあけて配置された複数のノズルベーンと、
一方の排気導入壁を他方の排気導入壁に対して対向方向に進退させるスライド機構と、
前記スライド機構を駆動する請求項1~4のいずれかに記載の油圧サーボ駆動装置とを備えている
ことを特徴とする可変ターボ過給機。 - 請求項6に記載の可変ターボ過給機において、
前記油圧サーボ駆動装置を駆動するための油は、当該油圧サーボ駆動装置が搭載されるエンジンの潤滑油である
ことを特徴とする可変ターボ過給機。 - 請求項7に記載の可変ターボ過給機において、
前記潤滑油は昇圧されて前記油圧サーボ駆動装置に供給される
ことを特徴とする可変ターボ過給機。 - 可変ターボ過給機において、
タービンホイール外側のノズル部に互いに対向して設けられた排気導入壁と、
前記排気導入壁の間で前記タービンホイールの周方向に沿って所定間隔をあけて配置された複数のノズルベーンと、
一方の排気導入壁を他方の排気導入壁に対して対向方向に進退させるスライド機構と、
前記スライド機構を駆動する請求項5に記載の油圧サーボ駆動装置とを備えている
ことを特徴とする可変ターボ過給機。 - 請求項9に記載の可変ターボ過給機において、
前記油圧サーボ駆動装置を駆動するための油は、当該油圧サーボ駆動装置が搭載されるエンジンの潤滑油である
ことを特徴とする可変ターボ過給機。 - 請求項10に記載の可変ターボ過給機において、
前記潤滑油は昇圧されて前記油圧サーボ駆動装置に供給される
ことを特徴とする可変ターボ過給機。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09721935.6A EP2267316B1 (en) | 2008-03-21 | 2009-03-02 | Hydraulic servo-drive device and variable turbo-supercharger using the same |
CN2009801100536A CN101978175B (zh) | 2008-03-21 | 2009-03-02 | 液压伺服驱动装置以及利用该液压伺服驱动装置的可变涡轮增压器 |
US12/933,479 US8770087B2 (en) | 2008-03-21 | 2009-03-02 | Hydraulic servo-drive device and variable turbo-supercharger using the same |
KR1020107016856A KR101223968B1 (ko) | 2008-03-21 | 2009-03-02 | 유압 서보 구동 장치 및 이것을 사용한 가변 터보 과급기 |
Applications Claiming Priority (2)
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JP2008-074404 | 2008-03-21 | ||
JP2008074404A JP5095458B2 (ja) | 2008-03-21 | 2008-03-21 | 油圧サーボ駆動装置、およびこれを用いた可変ターボ過給機 |
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WO2009116380A1 true WO2009116380A1 (ja) | 2009-09-24 |
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PCT/JP2009/053806 WO2009116380A1 (ja) | 2008-03-21 | 2009-03-02 | 油圧サーボ駆動装置、およびこれを用いた可変ターボ過給機 |
Country Status (6)
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US (1) | US8770087B2 (ja) |
EP (1) | EP2267316B1 (ja) |
JP (1) | JP5095458B2 (ja) |
KR (1) | KR101223968B1 (ja) |
CN (1) | CN101978175B (ja) |
WO (1) | WO2009116380A1 (ja) |
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CN102536438A (zh) * | 2012-01-18 | 2012-07-04 | 无锡威孚英特迈增压技术有限公司 | 涡轮壳滑动变截面装置 |
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US9091179B2 (en) * | 2010-08-13 | 2015-07-28 | Cummins Ltd. | Variable geometry turbine and assembly thereof |
GB201015679D0 (en) * | 2010-09-20 | 2010-10-27 | Cummins Ltd | Variable geometry turbine |
US8959911B2 (en) * | 2011-10-06 | 2015-02-24 | GM Global Technology Operations LLC | Engine assembly including fluid control to boost mechanism |
CN103437833B (zh) * | 2013-09-09 | 2016-05-25 | 中国航空动力机械研究所 | 进气导叶调节装置 |
CN106414948B (zh) * | 2016-07-14 | 2018-02-02 | 株式会社小松制作所 | 液压伺服装置和涡轮增压器 |
KR101999695B1 (ko) * | 2018-05-30 | 2019-07-12 | 현대위아(주) | 가변형 베인이 구비된 터보차저 |
CN109185498B (zh) * | 2018-11-23 | 2020-04-17 | 玉环信得利阀业股份有限公司 | 一种比例平衡阀 |
CN112343520B (zh) * | 2020-09-28 | 2022-06-28 | 四川宏华石油设备有限公司 | 一种井下离合装置 |
JP7405729B2 (ja) | 2020-11-09 | 2023-12-26 | トヨタ自動車株式会社 | ターボチャージャ |
JP7566607B2 (ja) * | 2020-12-10 | 2024-10-15 | 住友重機械工業株式会社 | スプール型流量制御弁およびその製造方法 |
CN115234538B (zh) * | 2022-08-30 | 2024-09-17 | 潍柴动力股份有限公司 | 一种先导式液压比例执行机构及液压泵 |
CN115434974A (zh) * | 2022-08-31 | 2022-12-06 | 潍柴动力股份有限公司 | 一种先导式液压比例执行机构及液压泵 |
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Publication number | Publication date |
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JP5095458B2 (ja) | 2012-12-12 |
CN101978175A (zh) | 2011-02-16 |
US20110011077A1 (en) | 2011-01-20 |
US8770087B2 (en) | 2014-07-08 |
EP2267316B1 (en) | 2014-05-07 |
KR20100098719A (ko) | 2010-09-08 |
KR101223968B1 (ko) | 2013-01-21 |
EP2267316A4 (en) | 2013-05-01 |
CN101978175B (zh) | 2013-11-13 |
JP2009228771A (ja) | 2009-10-08 |
EP2267316A1 (en) | 2010-12-29 |
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