WO2015097525A1 - Compresseur à suralimentation - Google Patents

Compresseur à suralimentation Download PDF

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Publication number
WO2015097525A1
WO2015097525A1 PCT/IB2014/002840 IB2014002840W WO2015097525A1 WO 2015097525 A1 WO2015097525 A1 WO 2015097525A1 IB 2014002840 W IB2014002840 W IB 2014002840W WO 2015097525 A1 WO2015097525 A1 WO 2015097525A1
Authority
WO
WIPO (PCT)
Prior art keywords
supporting member
turbine housing
spindle
exhaust
valve
Prior art date
Application number
PCT/IB2014/002840
Other languages
English (en)
Inventor
Akitoshi Iwata
Original Assignee
Toyota Jidosha Kabushiki Kaisha
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 Toyota Jidosha Kabushiki Kaisha filed Critical Toyota Jidosha Kabushiki Kaisha
Publication of WO2015097525A1 publication Critical patent/WO2015097525A1/fr

Links

Classifications

    • 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
    • F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
    • F02B37/183—Arrangements of bypass valves or actuators therefor
    • F02B37/186—Arrangements of actuators or linkage for bypass valves
    • 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 invention relates to a supercharger that is disposed in an internal combustion engine.
  • a bypass passage is disposed in a turbine housing of a supercharger.
  • the bypass passage allows exhaust gas to flow by bypassing a turbine wheel.
  • a waste gate valve that controls a flow rate of the exhaust which passes through the bypass passage is disposed in the supercharger (for example, Japanese Patent Application Publication No. 2009-236088 (JP 2009-236088 A)).
  • a valve 102 and a spindle 103 are disposed in a waste gate valve 100.
  • the valve 102 closes a bypass passage 101.
  • the spindle 103 is connected to the valve 102.
  • the spindle 103 is inserted into a bush 105 that is fixed to a turbine housing 104 and has a cylindrical shape, and is pivotably supported by the bush 105.
  • One end of an arm 106 is connected to the spindle 103, and a rod 108 that is driven by an actuator 107 is connected to the other end of the arm 106.
  • a load acts on a part of the turbine housing 104 where the bush 105 is held.
  • a part of the spindle that is connected to the arm 106 is in a state of being pulled leftward in FIG. 5, due to a force of the actuator 107, when the waste gate valve 100 is held in a closed state.
  • a load that presses the turbine housing 104 leftward in FIG. 5 acts on an outer circumferential side part of the turbine housing 104 via the bush 105 holding the spindle.
  • a pressure caused by the exhaust acts on the valve 102 of the waste gate valve 100.
  • a part of the spindle 103 that is connected to the valve 102 is in a state of being pressed rightward in FIG. 5. Therefore, a load that presses the turbine housing 104 rightward in FIG. 5 acts on an inner circumferential side part of the turbine housing 104 via the bush 105 holding the spindle 103.
  • the turbine housing may be deformed.
  • a position of the bush is changed, and thus a support position for the spindle is shifted, an oscillation range and an oscillation position of the waste gate valve are changed, and the valve may not be operated with accuracy.
  • the invention provides a supercharger that is capable of suppressing shift of a support position of a waste gate valve for a spindle.
  • a supercharger includes a turbine housing, a waste gate valve, and a supporting member.
  • the turbine housing includes a bypass passage allowing exhaust gas to flow by bypassing a turbine wheel.
  • the waste gate valve includes a valve and a spindle. The valve is configured to close the bypass passage.
  • the spindle is connected to the valve.
  • the waste gate valve is configured to oscillate the valve by allowing the spindle to pivot and control a flow rate of the exhaust gas passing through the bypass passage.
  • the supporting member is fixed to the turbine housing to pivotably support the spindle.
  • the supporting member is formed of a material higher in rigidity than a material constituting the turbine housing. The supporting member abuts against a first exhaust system member connected to an exhaust downstream side of the turbine housing.
  • the supporting member is formed of the material that is less likely to be deformed than the turbine housing and the spindle is supported by the supporting member. Accordingly, a deformation of the supporting member itself due to a load that acts on the supporting member from the spindle is suppressed.
  • the supporting member abuts against the first exhaust system member and is interposed between the first exhaust system member and the turbine housing. Accordingly, a displacement of the supporting member to the exhaust downstream side is suppressed when the spindle is pressed to the exhaust downstream side by a pressure of the exhaust.
  • the supporting member may abut against a part of an exhaust upstream side end face of the first exhaust system member. According to the configuration described above, the supporting member can be more compact in size than in a case where the supporting member abuts against the entire exhaust upstream side end face of the first exhaust system member. Accordingly, handling of the supporting member is facilitated and assembly to the turbine housing and the first exhaust system member is facilitated.
  • the supercharger described above further includes a heat shield plate.
  • the heat shield plate may cover a part of an inner wall of the turbine housing, and the heat shield plate may be disposed in the turbine housing.
  • the supporting member and the heat shield plate may be one piece. According to the configuration described above, the heat shield plate is disposed in the turbine housing so as to suppress direct exposure of the turbine housing to the high-temperature exhaust.
  • the heat shield plate and the supporting member are one piece, that is, the heat shield plate and the supporting member are integrally formed.
  • the number of components can be reduced and manufacturing of the supercharger can be facilitated.
  • a convex portion may be disposed in any one of the turbine housing and the supporting member to protrude toward the other one of the turbine housing and the supporting member and a concave portion may be disposed in the other one of the turbine housing and the supporting member to be fitted into the convex portion.
  • the convex portion is fitted into the concave portion so that the supporting member is held at a predetermined position in the turbine housing. Accordingly, the assembly of the supporting member can be facilitated and the change of the support position for the spindle can be further suppressed according to the configuration described above.
  • the supercharger described above, further comprising a bush holding the spindle, and the bush may be disposed in the supporting member.
  • the supporting member and the bush may be formed of materials having a same linear expansion coefficient.
  • the exhaust flowing through the supercharger has a high temperature, and thus the supporting member is heated by heat of the exhaust.
  • a gap may be generated between the supporting member and the bush when the supporting member is heated. Accordingly, a position of the bush holding the spindle may be changed.
  • the linear expansion coefficient of the supporting member is equal to the linear expansion coefficient of the bush, and thus the gap is unlikely to be generated between the supporting member and the bush even when the supporting member and the bush are heated and thermally expanded. Accordingly, the change of the position of the bush holding the spindle can be suppressed.
  • FIG. 1 is a side view of a turbine side part of a supercharger according to an embodiment of the invention
  • FIG. 2 is a section view illustrating a structure of a waste gate valve of the supercharger of the embodiment
  • FIG. 3 is an enlarged partial sectional view illustrating the vicinity of a supporting member of the supercharger of the embodiment
  • FIG. 4 is a side view of a turbine side part of a supercharger according to another embodiment.
  • FIG. 5 is a side view of a turbine side part of a supercharger according to the related art.
  • an exhaust inlet portion 11 and a scroll passage 13 are disposed in a turbine housing 10 of the supercharger.
  • An exhaust that passes through a cylinder head or an exhaust manifold flows into the exhaust inlet portion 11.
  • the scroll passage 13 guides the exhaust from the exhaust inlet portion 11 to a turbine wheel 12.
  • the turbine wheel 12 is connected . to a compressor wheel of the supercharger that is disposed in an intake passage via an axis of rotation of the turbine wheel 12. Accordingly, the compressor wheel rotates and intake air is supercharged when the exhaust rotates the turbine wheel 12.
  • the exhaust that passes through the turbine wheel 12 flows to an outlet portion 14 that is disposed on an exhaust downstream side from the turbine wheel 12.
  • a flange 15 is formed in an end portion of the outlet portion 14.
  • An exhaust pipe 16 as a downstream side exhaust system member (a first exhaust system member) is disposed on an exhaust downstream side from the turbine housing 10.
  • a flange 17 is disposed in an exhaust upstream side end portion of the exhaust pipe 16.
  • the flanges 15, 17 are fixed to each other in a state where an end face of the flange 17 that is disposed in the end portion of the exhaust pipe 16 and an end face of the flange 15 that is disposed in the end portion of the outlet portion 14 of the turbine housing 10 abut against each other.
  • the turbine housing 10 and the exhaust pipe 16 are connected to each other in this manner.
  • the turbine housing 10 is manufactured by casting with aluminum used as a material.
  • a bypass passage 18 that allows the exhaust to flow by bypassing the turbine wheel 12 is disposed in the turbine housing 10.
  • the bypass passage 18 allows the scroll passage 13 and the outlet portion 14 to communicate with each other.
  • a waste gate valve 19 is disposed at a part of the turbine housing 10 where an outlet of the bypass passage 18 is open.
  • the waste gate valve 19 has a valve 20 and a spindle 21 that is connected to the valve 20.
  • the valve 20 has a hemispherical shape, and abuts against the part of the turbine housing 10 where the outlet of the bypass passage 18 is open.
  • the bypass passage 18 is in a closed state in this manner.
  • the spindle 21 is bent in the middle, and one end of the spindle 21 is connected to the valve 20. The other end of the spindle 21 is inserted into an insertion hole 23 of a supporting member 22 that is fixed to the turbine housing 10. As illustrated in FIG. 1, the supporting member 22 is fitted into a concave portion 24 that is disposed in the turbine housing 10.
  • a convex portion 25 that protrudes toward the turbine housing 10 is disposed in the supporting member 22.
  • a groove 26 into which the convex portion 25 is fitted is disposed in the turbine housing 10.
  • the groove 26 extends to an exhaust downstream side (that is, extends in an exhaust downstream direction) to reach an exhaust downstream side opening of the turbine housing 10.
  • the supporting member 22 is held by the turbine housing 10 in a state where the convex portion 25 is fitted into the groove 26.
  • a bush 27 that has a cylindrical shape is fitted into the insertion hole 23 of the supporting member 22.
  • the spindle 21 is pivotably supported by the bush 27.
  • One end of an arm 28 is connected to the spindle 21.
  • a rod 30 that is driven by an actuator 29 is connected to the other end of the arm 28.
  • a heat shield plate 31 that covers a part of an inner wall of the turbine housing 10 via an insulated space is disposed in the outlet portion 14 of the turbine housing 10.
  • the heat shield plate 31 is integrally formed with the supporting member 22. That is, the supporting member 22 and the heat shield plate 31 are one piece.
  • the heat shield plate 31 covers an inner wall of the outlet portion 14 over the entire circumference in a circumferential direction in FIG. 2, which illustrates a cross section orthogonal to a flow direction of the exhaust.
  • the supporting member 22 and the heat shield plate 31 are formed by sintering powder of stainless steel that is a material higher in rigidity than aluminum.
  • the bush 27 is also formed by sintering powder of stainless steel as is the case with the supporting member 22.
  • the magnitude of material rigidity can be determined by forming members having the same shape with two different materials and comparing amounts of deformation at a time when the same load is applied in the same condition. The material with the smaller member deformation amount is the material that is higher in rigidity.
  • the supporting member 22 extends to an exhaust downstream side to constitute a part of the flange 15.
  • an exhaust downstream side surface of the supporting member 22 abuts against a part of the end face of the flange 17 of the exhaust pipe 16 in a state where the turbine housing 10 and the exhaust pipe 16 are connected to each other.
  • the supporting member 22 surrounds the bush 27 and is sufficiently larger than the bush 27, and thus the area of each of contact surfaces SI, S2, S3 of the supporting member 22 in contact with the turbine housing 10 is larger than half of the contact area between the bush 27 and the supporting member 22.
  • the supporting member 22 and the turbine housing 10 can be assembled, for example, as follows. Firstly, the supporting member 22 that is integrally formed with the heat shield plate 31 is inserted toward an inner portion of the outlet portion 14 from out of the turbine housing 10. In this case, the supporting member 22 is pushed to a predetermined position by sliding the convex portion 25 of the supporting member 22 along the groove 26 since the groove 26, which extends to the opening of the turbine housing 10, is disposed in the turbine housing 10. When the supporting member 22 that is guided by the groove 26 of the turbine housing 10 in this manner is assembled at a predetermined position of the turbine housing 10, a part of the inner wall of the outlet portion 14 is in a state of being covered by the heat shield plate 31.
  • the bush 27 is fitted into the insertion hole 23 of the supporting member 22 and the turbine housing 10 is connected to the exhaust pipe 16. Then, a downstream side end face of the supporting member 22 abuts against the end face of the flange 17 of the exhaust pipe 16 and the supporting member 22 is interposed between the turbine housing 10 and the exhaust pipe 16.
  • the supporting member 22 is formed of stainless steel, which is a material higher in rigidity than the turbine housing 10, and the spindle 21 is supported by the supporting member 22. Accordingly, deformation of the supporting member 22 due to a load acting on the supporting member 22 from the spindle 21 is suppressed.
  • the supporting member 22 is interposed between the exhaust pipe 16 and the turbine housing 10. Accordingly, displacement of the supporting member 22 to an exhaust downstream side at a time when the spindle 21 is pressed to an exhaust downstream side by pressure of the exhaust is also suppressed. In addition, the supporting member 22 abuts against a part of the end face of the flange 17 of the exhaust pipe 16 in this supercharger. Accordingly, the supporting member 22 can be more compact in size than in a case where the supporting member 22 abuts against the entire end face of the flange 17 of the exhaust pipe 16.
  • the supporting member 22 is formed of stainless steel, which is heavier than the aluminum constituting the turbine housing 10. Accordingly, the mass of the supercharger may increase when the supporting member 22 becomes larger in size. In this supercharger, the supporting member 22 is compact in size, and thus increase in weight that arises when the supporting member 22 is disposed can be suppressed.
  • the heat shield plate 31 that covers the inner wall of the turbine housing 10 via the insulated space is disposed in the turbine housing 10. Accordingly, direct exposure of the turbine housing 10 to the high-temperature exhaust can be suppressed and the amount of heat moving from the heat shield plate 31 to the turbine housing 10 can also be suppressed. Accordingly, supercharging of the turbine housing 10 is suppressed. Since the heat shield plate 31 and the supporting member 22 are integrally formed, the number of components can be reduced and manufacturing of the supercharger can be facilitated.
  • the convex portion 25 that protrudes toward the turbine housing 10 is disposed in the supporting member 22.
  • the groove 26 into which the convex portion 25 is fitted, is disposed in the turbine housing 10. Accordingly, the supporting member 22 is held at a predetermined position in the turbine housing 10 when the convex portion 25 is fitted into the groove 26.
  • the supporting member 22 and the bush 27 are heated by heat of the exhaust flowing in the supercharger. Accordingly, a gap may be generated between the heated supporting member 22 and the heated bush 27 in a case where linear expansion coefficients of the supporting member 22 and the bush 27 differ from each other. This may cause a position of the bush 27 to be changed.
  • the supporting member 22 and the bush 27 are formed of stainless steel. Accordingly, the linear expansion coefficient of the supporting member 22 and the linear expansion coefficient of the bush 27 are equal to each other, and thus it is difficult to generate a gap between the supporting member 22 and the bush 27 even when the supporting member 22 and the bush 27 are heated and thermally expanded. Accordingly, positional change of the bush 27 is suppressed.
  • the supporting member 22 is formed of a material higher in rigidity than a material constituting the turbine housing 10, and the supporting member 22 abuts against the exhaust pipe 16. Accordingly, change of a support position of the waste gate valve 19 for the spindle 21 can be suppressed even when the pressure of the exhaust acts On the waste gate valve 19. Eventually, change in oscillation range and oscillation position of the waste gate valve 19 can be suppressed so that the valve 19 can be operated with accuracy.
  • the supporting member 22 Since the supporting member 22 abuts against a part of the end face of the flange 17 of the exhaust pipe 16, the supporting member 22 can be more compact in size than in a case where the supporting member 22 abuts against the entire end face of the flange 17 of the exhaust pipe 16. Accordingly, handling of the supporting member 22 is facilitated and assembly to the turbine housing 10 and the exhaust pipe 16 is facilitated.
  • a convex portion that protrudes toward the supporting member 22 may be disposed in the turbine housing 10 and a groove into which the convex portion is fitted may be disposed in the supporting member 22. Effects similar to (1) to (5) above can also be achieved with this configuration.
  • the groove 26 that extends to the exhaust downstream side opening is disposed in the turbine housing 10 in the embodiment described above.
  • this configuration can be appropriately changed insofar as a concave portion into which the convex portion 25 disposed in the supporting member 22 is fitted is provided.
  • the groove may not extend to the exhaust downstream side opening.
  • the size of an outer circumferential surface of the supporting member 22 is set so that the area of each of the contact surfaces SI, S2, S3 of the supporting member 22 in contact with the turbine housing 10 is larger than half of the contact area between the bush 27 and the supporting member 22.
  • the size of the outer circumferential surface of the supporting member 22 may be set so that the area of only one of the contact surfaces SI, S2, S3 on which the largest load acts when the actuator is driven, for example, the contact surface S2, is larger than half of the contact area between the bush 27 and the supporting member 22.
  • this configuration may also be omitted. Effects similar to (1) to (5) above can also be achieved with this configuration.
  • the bush 27 are formed of materials having the same linear expansion coefficient to each other. However, these members may also be formed of materials having linear expansion coefficients. Alternatively, the bush 27 may not be disposed in the supporting member 22 and the spindle 21 may be supported by using the insertion hole 23 of the supporting member 22. Effects similar to (1) to (4) above can also be achieved with this configuration.
  • the convex portion 25 that protrudes toward the turbine housing 10 is disposed in the supporting member 22 and the groove 26 into which the convex portion 25 is fitted is disposed in the turbine housing 10.
  • this configuration may be omitted. Effects similar to (1) to (3) above can also be achieved with this configuration.
  • the supporting member 22 and the heat shield plate 31 are integrally formed. That is, the supporting member 22 and the heat shield plate 31 are one piece. However, the supporting member 22 and the heat shield plate 31 may also be separately formed. Effects similar to (1) to (2) above can also be achieved with this configuration.
  • the heat shield plate 31 that covers the inner wall of the outlet portion 14 of the turbine housing 10 over the entire circumference in the circumferential direction is disposed. However, only a part in the circumferential direction may be covered. Also, the heat shield plate 31 may not be disposed.
  • the supporting member may abut against the entire end face of the flange 17 of the exhaust pipe 16.
  • the supporting member may be formed as illustrated in FIG. 4.
  • the supporting member is different in configuration from the respective embodiments described above.
  • the same reference numerals are attached to the same configuration as in the respective embodiments, and detailed description thereof will be omitted.
  • a supporting member 40 is interposed between the flange 15 of the turbine housing 10 and the flange 17 of the exhaust pipe 16.
  • the supporting member 40 has an annular shape, and an outer diameter of the supporting member 40 is approximately equal to outer diameters of the flanges 15, 17.
  • the supporting member 40 is formed of stainless steel.
  • a support hole 41 is disposed in the supporting member 40.
  • the spindle 21 of the waste gate valve 19 is pivotably supported by the support hole 41.
  • the supporting member 40 is interposed between the exhaust pipe 16 and the turbine housing 10, and thus displacement of the supporting member 40 to an exhaust downstream side at a time when the spindle 21 is pressed to an exhaust downstream side by the pressure of the exhaust is suppressed.
  • the supporting member 40 is formed of stainless steel, which is higher in rigidity than the aluminum constituting the turbine housing 10. Accordingly, an effect similar to (1) above can also be achieved with this configuration.
  • the turbine housing 10 is manufactured by using aluminum in the embodiment described above. However, the turbine housing 10 may also be manufactured by using other materials such as cast steel, cast iron, and stainless steel. In this case, the support member may be formed of a material higher in rigidity than the material constituting the turbine housing.
  • a technical idea similar to the above-described embodiment may be applied to a water-cooled supercharger in which a coolant passage is disposed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supercharger (AREA)

Abstract

La présente invention concerne un compresseur à suralimentation comprenant un logement de turbine, un robinet-vanne de déchets, un élément de support. Le logement de turbine comprend un passage de dérivation permettant au gaz d'échappement de circuler en contournant une roue de turbine. Le robinet-vanne de déchets comprend une vanne et une tige, la vanne étant conçue pour fermer le passage de dérivation, la tige étant raccordée à la vanne, et le robinet-vanne de déchets étant conçu pour faire osciller la vanne en permettant à la tige de pivoter et de commander un débit du gaz d'échappement passant à travers le passage de dérivation. L'élément de support est fixé au logement de turbine pour supporter en pivotement la tige. L'élément de support est formé d'un matériau d'une rigidité supérieure à celle d'un matériau constituant le logement de turbine, et l'élément de support vient en butée contre un premier élément de système d'échappement raccordé à un côté aval d'échappement du logement de turbine.
PCT/IB2014/002840 2013-12-25 2014-12-19 Compresseur à suralimentation WO2015097525A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-266727 2013-12-25
JP2013266727A JP2015121200A (ja) 2013-12-25 2013-12-25 過給機

Publications (1)

Publication Number Publication Date
WO2015097525A1 true WO2015097525A1 (fr) 2015-07-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2014/002840 WO2015097525A1 (fr) 2013-12-25 2014-12-19 Compresseur à suralimentation

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JP (1) JP2015121200A (fr)
WO (1) WO2015097525A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5857337A (en) * 1996-02-29 1999-01-12 Aisin Seiki Kabushiki Kaisha Turbocharger
JP2009236088A (ja) 2008-03-28 2009-10-15 Mitsubishi Heavy Ind Ltd 排気制御バルブを備えた排気タービン
WO2011053513A2 (fr) * 2009-10-30 2011-05-05 Borgwarner Inc. Corps de turbine d'un turbocompresseur de gaz d'échappement
WO2013003134A1 (fr) * 2011-06-28 2013-01-03 Borgwarner Inc. Turbocompresseur à gaz d'échappement
US20130247565A1 (en) * 2012-03-21 2013-09-26 Honeywell International Inc. Turbocharger Cartridge, Bypass, and Engine Cylinder Head Assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5857337A (en) * 1996-02-29 1999-01-12 Aisin Seiki Kabushiki Kaisha Turbocharger
JP2009236088A (ja) 2008-03-28 2009-10-15 Mitsubishi Heavy Ind Ltd 排気制御バルブを備えた排気タービン
WO2011053513A2 (fr) * 2009-10-30 2011-05-05 Borgwarner Inc. Corps de turbine d'un turbocompresseur de gaz d'échappement
WO2013003134A1 (fr) * 2011-06-28 2013-01-03 Borgwarner Inc. Turbocompresseur à gaz d'échappement
US20130247565A1 (en) * 2012-03-21 2013-09-26 Honeywell International Inc. Turbocharger Cartridge, Bypass, and Engine Cylinder Head Assembly

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