JP4948800B2 - Turbine housing - Google Patents

Description

  The present invention relates to a turbine housing which is a component of an exhaust turbine side of a turbocharger. In particular, the present invention relates to an improvement in a turbine housing to which a waste gate mechanism including a waste gate valve is mounted.

  In general, a turbocharger for an automobile engine includes an exhaust turbine and a compressor that are coaxially connected, and a supercharging pressure control mechanism for preventing the supercharging pressure by the compressor from exceeding a set pressure. A supercharging pressure control mechanism includes a diaphragm that responds to a pressure change on the compressor side, a supercharging pressure control actuator having a built-in supercharging pressure setting spring, and an exhaust turbine side wastegate that is operatively connected to the actuator via a rod. It consists of a mechanism. For example, as shown in FIG. 10, a waste gate mechanism 30 includes a waste gate valve 34 that opens and closes a waste gate port provided in a turbine housing of an exhaust turbine, a bush 31 attached to the turbine housing, a shaft supported by the bush, It is comprised from the link member 35 which connects the shaft and the said rod. When the supercharging pressure exceeds the set pressure, the supercharging pressure control actuator opens the waste gate valve 34 via the rod, the link member 35 and the shaft, so that the exhaust gas toward the exhaust turbine is waste gated. Bypassing from the port to the outlet side of the turbine housing, as a result, overrun of the exhaust turbine is prevented in advance (see, for example, Patent Documents 1 and 2).

  Conventional turbine housings are relatively thick and have very high mechanical rigidity. For this reason, even if a downstream exhaust system component (for example, an elbow or a maniverter) connected to an outlet flange provided on the outlet side of the turbine housing is thermally deformed, the turbine housing is deformed due to the influence thereof. There was no. On the other hand, thermal deformation of the downstream exhaust system parts connected to the turbine housing did not adversely affect the waste gate mechanism.

  However, in recent years, in order to realize early activation of the exhaust gas purification catalyst at the time of low temperature start-up of automobile engines, it has become an important technical issue to reduce the heat capacity of exhaust system parts, and the turbine housing has also become thinner. (See, for example, Patent Document 3). However, the reduction in the thickness of the turbine housing leads to a decrease in mechanical rigidity at the same time. As a negative aspect, the turbine housing is affected by thermal deformation of the downstream exhaust system parts connected to the outlet flange of the turbine housing. Invited the troubled situation of deformed. In particular, when the turbine housing is deformed during the operation of the turbocharger, the valve opening start pressure of the wastegate valve is unintentionally deviated from the initial setting, and the problem is that the supercharging pressure control as designed cannot be performed. More specifically, when an unexpected twist occurs in the turbine housing due to an external force, the bush attached to the housing body shifts from the original position, and the shaft supported by the bush also shifts to an undesired position. End up. As a result, the link path (that is, the rod, link member, and shaft) that transmits the operation of the supercharging pressure control actuator to the waste gate valve is disrupted in mechanical connection or malfunctions, and the opening start pressure of the waste gate valve is distorted. End up. The present invention has been made in view of such circumstances.

JP 58-117322 A Japanese Utility Model Publication No. 63-1000063 and its full text JP2003-56354A (summary, paragraph 0003)

  An object of the present invention is to provide a wastegate without being affected by deformation due to external force even if the turbine housing is easily deformed due to influence from external force from a downstream exhaust system component connected to an outlet flange. An object of the present invention is to provide a turbine housing capable of maintaining a valve opening start pressure of a valve almost accurately.

  In addition, even if the turbine housing is easily deformed due to the influence of external forces from the downstream exhaust system parts connected to the outlet side flange, the influence of the deformation due to the external forces is alleviated and the waste gate valve is opened. It is an object of the present invention to provide a turbine housing capable of keeping a start pressure deviation relatively small.

  The present inventor considers the external force exerted on the turbine housing based on the deformation due to thermal expansion or the like of the downstream exhaust system parts (for example, elbows and maniverters) connected to the outlet flange of the turbine housing when the vehicle is mounted, and the influence of the external force. As a result, the turbine housing was analyzed carefully to see how it deforms. As a result, a wastegate in which the flange on the outlet side of the turbine housing communicates the first columnar portion of the housing body defining the outlet port that is the exhaust gas outlet of the turbine chamber and the upstream side of the turbine chamber to the outlet side of the turbine chamber. Since it is integrated with the main part of the housing body that defines the turbine chamber via the second columnar portion of the housing body that defines the port, when viewed from the direction where the outlet side flange is the front surface Let the turbine housing connected to the downstream exhaust system components be tilted about the imaginary line (L) that is grasped as a straight line passing through the center of the first columnar part and the center of the second columnar part. It was found that a force (that is, a force to cause twisting in the turbine housing) acts. The present invention is based on such new technical knowledge.

The present invention (Claims 1, 2 and 3) includes a turbine chamber, an outlet port which is an exhaust gas outlet of the turbine chamber, a waste gate port which communicates the upstream side of the turbine chamber with the outlet side of the turbine chamber, and the waste gate port thereof. A housing main body having a bush mounting portion provided in the vicinity, an outlet flange provided on the outlet side of the housing main body for connecting downstream exhaust system parts to the housing main body, and the bush mounting portion A bush, a shaft supported by the bush, a waste gate valve for opening and closing the waste gate port provided at one end of the shaft, and a waste gate mechanism having a link member provided at the other end of the shaft. a turbine housing, an outlet-side flange of the turbine housing The second column of the housing body that defines the first columnar portion of the housing body that defines the outlet port that is the exhaust gas outlet of the turbine chamber and the waste gate port that communicates the upstream side of the turbine chamber with the outlet side of the turbine chamber. The present invention relates to a turbine housing that is integrated with a main part of a housing body that defines a turbine chamber via a columnar part .

In the turbine housing according to claim 1, when the connecting portion (P) with the supercharging pressure control actuator in the link member constituting the waste gate mechanism is viewed from the direction in which the outlet side flange is the front surface, The bush of the waste gate mechanism is attached to the bush mounting portion of the housing body so as to be positioned on an imaginary line (L) passing through the center and the center of the waste gate port.

According to claim 1, the connecting portion (P) of the link member connected to the supercharging pressure control actuator is on an imaginary line (L) passing through the outlet port center and the waste gate port center when the outlet side flange is viewed from the front. It is positioned set to be located (see Figure 5). Therefore, even if the downstream exhaust system component connected to the outlet flange exerts an external force on the turbine housing based on deformation due to thermal expansion or the like, the imaginary line that is the central axis of the housing twist caused by the external force ( L) Since the connecting portion (P) of the link member with the supercharging pressure control actuator is located on the upper side , the connecting portion (P) is essentially not easily displaced. That is, the absolute position of the connecting portion (P) of the link member with the supercharging pressure control actuator does not change much before and after the downstream exhaust system component is deformed due to thermal expansion or the like. In this way, the mechanical connection between the link member of the waste gate mechanism mounted on the turbine housing and the supercharging pressure control actuator is always kept constant, so the external force from the downstream exhaust system parts causes the turbine housing Even if twisting occurs, it is possible to prevent a large deviation in the valve opening start pressure of the waste gate valve.

In the turbine housing according to claim 2, when the connection part (Q) with the shaft in the link member which constitutes the waste gate mechanism is viewed from the direction in which the outlet side flange is the front, the center of the outlet port and the waste The bush of the waste gate mechanism is attached to the bush attachment portion of the housing body so as to be positioned on an imaginary line (L) passing through the center of the gate port.

According to claim 2, the connecting portion between the shaft definitive link member (Q) is located on the imaginary line (L) passing through the outlet port center and the wastegate port center when viewed in front of the outlet side flange are positioned such that (see Fig. 7 and 8). Therefore, even if the downstream exhaust system component connected to the outlet flange exerts an external force on the turbine housing based on deformation due to thermal expansion or the like, the imaginary line that is the central axis of the housing twist caused by the external force ( L) Since the connecting portion (Q) with the shaft of the link member is located on the upper side , the connecting portion (Q) is essentially not easily displaced. That is, the absolute position of the connecting portion (Q) with the shaft in the link member does not change much before and after the downstream exhaust system parts are deformed due to thermal expansion or the like. In this way, the mechanical connection between the shaft of the wastegate mechanism mounted on the turbine housing and the supercharging pressure control actuator via the link member is always kept constant. Even if the turbine housing is twisted due to the external force, it is possible to prevent a large deviation in the valve opening start pressure of the waste gate valve.

  In the turbine housing according to claim 3, the intermediate portion of the link member between the connecting portion (P) of the link member constituting the waste gate mechanism and the supercharging pressure control actuator and the connecting portion (Q) of the shaft. The bush of the waste gate mechanism is positioned on a virtual line (L) passing through the center of the outlet port and the center of the waste gate port when viewed from the direction in which the outlet flange is the front. It is attached to the bush mounting part of the housing body.

  According to the third aspect, the virtual line (L) passing through the center of the outlet port and the center of the waste gate port when the outlet side flange is viewed from the front is connected to the boost pressure control actuator in the link member constituting the waste gate mechanism. It passes between the part (P) and the connecting part (Q) of the shaft (see FIG. 9). The configuration of claim 3 can be said to be a configuration in an intermediate state between the configuration of claim 1 and the configuration of claim 2. According to this configuration, when the downstream exhaust system component connected to the outlet flange exerts an external force on the turbine housing based on deformation due to thermal expansion or the like, the imaginary line that is the central axis of the housing torsion caused by the external force (L) Since neither the connecting part (P) with the supercharging pressure control actuator in the link member nor the connecting part (Q) with the shaft is located on the link member, both these connecting parts (P, Q) are on the downstream side. The exhaust system parts are clearly misaligned before and after deformation due to thermal expansion. However, by adopting a structure in which the imaginary line (L) passes between these two connecting portions, the degree of positional deviation between both connecting portions is suppressed to be relatively small. Therefore, even if the turbine housing is twisted due to the external force from the downstream exhaust system parts, the change in the opening start pressure of the waste gate valve is kept small.

[Additional remarks] Further preferable aspects and additional constituent elements of the present invention are listed below.
-In Claim 1, 2, or 3, the said imaginary line (L) is grasped | ascertained as a straight line which passes along the center of an exit port, and the center of a waste gate port, when it sees from the direction which makes the said exit side flange the front. However, it is a virtual line (L). The imaginary line (L) is an imaginary line (L) serving as a central axis of housing twist.
-In Claim 1, 2, or 3, the said exit port and waste gate port are opening to the exit side space (S) enclosed by the said exit side flange.

  According to the turbine housing of the first and second aspects, even if the turbine housing is easily deformed due to the influence of the external force from the downstream exhaust system parts connected to the outlet side flange, the deformation by the external force is caused. It is possible to maintain the valve opening start pressure of the waste gate valve almost accurately without being affected by the above. As a result, it is very easy to reduce the thickness of the turbine housing.

  According to the turbine housing of the third aspect, even if the turbine housing is easily deformed due to the influence of the external force from the downstream exhaust system parts connected to the outlet side flange, the influence of the deformation due to the external force. And the deviation of the opening start pressure of the waste gate valve can be kept relatively small. As a result, it is easy to reduce the thickness of the turbine housing.

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

[First Embodiment]
1 to 4 show a turbine housing (single unit) according to the first embodiment, and FIGS. 5 and 6 show a turbine housing to which a waste gate mechanism is attached. 1 and 5 are front views when the turbine housing is viewed from the direction in which the outlet side flange 23 is the front.

  As shown in FIGS. 1 to 4, the turbine housing includes a scroll portion 11 that defines a turbine chamber (not shown) therein, and an outlet case portion 12 provided on the front side thereof. The scroll portion 11 and the outlet case portion 12 include a first columnar portion 14 that defines an outlet port 13 that is an exhaust gas outlet of the turbine chamber, and a waste gate port 15 that communicates the upstream side of the turbine chamber with the outlet side of the turbine chamber. The outlet port 13 and the waste gate port 15 are opened on the front side of the outlet case portion 12, respectively. A valve seat surface 17 for seating a waste gate valve 34 (see FIG. 5) is formed in an annular shape on the periphery of the waste gate port 15 opened to the front side of the outlet case portion 12. In addition, the outlet case portion 12 is provided with a bush mounting portion 18 in the vicinity of the waste gate port 15 in which a hole 18a for mounting the bush 31 (see FIG. 5) is formed. The housing body 10 is constituted by the scroll portion 11, the outlet case portion 12, the first columnar portion 14, the second columnar portion 16, and the bush mounting portion 18.

  An inlet side flange 21 for connecting an upstream exhaust system component (for example, an exhaust manifold) to the housing body 10 is provided at the bottom of the scroll portion 11 (see FIG. 3). An inlet port 22 for introducing exhaust gas from the engine into the turbine chamber is formed substantially at the center of the inlet flange 21. The exhaust gas that has entered the inlet port 22 is normally directed to the outlet port 13 via the turbine chamber. However, when the waste gate port 15 is open, a part of the exhaust gas passes through the waste gate port 15. Bypassed to the turbine chamber outlet side.

  On the front surface of the outlet case portion 12, an outlet side flange 23 for connecting a downstream exhaust system component (for example, an elbow or a maniverter) to the housing body 10 is provided. The outlet side flange 23 is formed with a joint surface 23a for joining with the flange on the downstream exhaust system component side. The outlet side flange 23 integrated with the outlet case portion 12 and the bush mounting portion 18 defines an outlet side space S in an inner region surrounded by the outlet side flange 23, and the outlet port 13 and the waste gate port 15 The outlet side space S is opened. In the present embodiment, when the outlet side flange 23 is viewed from the front as shown in FIG. 1, the centers of the outlet port 13 and the waste gate port 15 opened in the outlet side space S surrounded by the outlet side flange 23 are defined. An imaginary line L passing straight can be assumed. This imaginary line L becomes the central axis of the housing twist caused by the external force when the downstream exhaust system component connected to the outlet side flange 23 exerts an external force on the turbine housing based on deformation due to thermal expansion or the like. It is.

  In the present specification and drawings, an imaginary line L as a central axis of housing torsion is drawn as a straight line projected on the paper surface of the front view of the outlet side flange 23 as shown in FIG. It is grasped as a straight line projected on the target paper. Originally, in each specific turbine housing, the absolute coordinate in the three-dimensional space of the virtual line L that is the central axis of the housing twist is uniquely determined. In general, the three-dimensional coordinate of the virtual line L is Since it is influenced by various factors such as the length and thickness of the first and second columnar portions 14 and 16, or the relative positional relationship between the inlet side flange 21 and the outlet side flange 23, the three-dimensional absolute coordinate of the virtual line L is The actual situation is different for each turbine housing. However, even if factors such as the length and thickness of the first and second columnar portions and the relative positional relationship between the outlet side flange and the inlet side flange affect the three-dimensional absolute coordinates of the virtual line L, at least When the front side of the outlet flange 23 is viewed from the front (that is, when projected onto the two-dimensional paper surface), the phantom line L, which is the central axis of the housing twist, corresponds to the outlet port 13 and the waste gate port 15. The technical knowledge that is the premise of the present invention is that the condition that the straight line passes through each center is satisfied. In understanding the present invention, it is necessary to keep this point in mind (the same applies to the second and third embodiments described later).

  As shown in FIGS. 5 and 6, a waste gate mechanism 30 is attached to the single turbine housing shown in FIGS. 1 to 4. The waste gate mechanism 30 includes a bush 31 that is a cylindrical bearing member, a shaft 32 supported by the bush 31 (the end surface of the shaft 32 is shown in FIG. 6), a valve arm 33, and a waste gate valve 34 that is a dish type valve. And a short lever-like link member 35.

  The bush 31 is press-fit into the hole 18a of the bush mounting portion, and supports the shaft 32 so as to be rotatable. The shaft 32 passes through the outlet case portion 12 together with the bush 31, and one end of the shaft 32 is disposed in the outlet side space S and the other end is disposed outside the turbine housing. A waste gate valve 34 is attached to one end portion of the shaft 32 that has entered the outlet side space S via a valve arm 33. Further, one end of a short lever-like link member 35 is fixed to the other end of the shaft 32 protruding outside the turbine housing. The link member 35 integrated with the shaft 32 extends in a direction orthogonal to the central axis C of the shaft 32. Note that an actuator rod 37 operatively connecting the link member 35 and the supercharging pressure control actuator 36 is provided at the end of the short lever-like link member 35 opposite to the end connected to the shaft 32. The tip ends are connected (see FIG. 6).

  In this embodiment, the length of the valve arm 33 is such that the center of the waste gate valve 34 when it is seated on the valve seat surface 17 that borders the waste gate port 15 substantially overlaps the center of the waste gate port 15. Is set. Further, when the outlet side flange 23 is viewed from the front, the connecting portion center P of the link member 35 with the actuator rod 37 is positioned on an imaginary line L passing through the center of the outlet port 13 and the center of the waste gate port 15. As described above, the position and orientation of the hole 18a of the bush mounting portion 18 and the length of the link member 35 are set.

  In the first embodiment, the connecting portion center P of the link member 35 with the actuator rod 37 is on an imaginary line L passing through the center of the outlet port 13 and the center of the waste gate port 15 when the outlet side flange 23 is viewed from the front. The waste gate mechanism 30 is attached to the housing body 10 so as to be positioned. For this reason, even if the downstream exhaust system component connected to the outlet flange 23 exerts an external force on the turbine housing based on deformation due to thermal expansion or the like, the imaginary line L that is the central axis of the housing torsion caused by the external force Since the connecting part center P is located at the center, the connecting part center P is not essentially displaced. Therefore, even if the turbine housing is twisted due to an external force from the downstream exhaust system parts, the valve opening start pressure of the waste gate valve 34 does not change.

[Second Embodiment]
7 and 8 show the turbine housing (with the waste gate mechanism 30 already mounted) of the second embodiment, and both drawings are front views when the outlet side flange 23 is viewed from the front. The example of FIG. 7 differs from the example of FIG. 8 in the manner in which the waste gate mechanism 30 is attached at first glance, but the basic concept regarding the attachment of the waste gate mechanism 30 is common to both as described below, and its meaning Are classified as embodiments of the same category.

  As in the first embodiment, the turbine housing of the second embodiment includes a housing body 10 including a scroll portion 11, an outlet case portion 12, a first columnar portion 14, a second columnar portion 16, and a bush mounting portion 18. In addition, a waste gate mechanism 30 including a bush 31, a shaft 32, a valve arm 33, a waste gate valve 34 as a dish-shaped valve and a short lever-like link member 35 is provided. Further, when the outlet side flange 23 is viewed from the front, the housing twisting of the outlet port 13 and the waste gate port 15 that pass straight through the centers of the outlet port 13 and the waste gate port 15 that are open to the outlet side space S surrounded by the outlet side flange 23. The point which can assume the virtual line L as a central axis is the same as that of the said 1st Embodiment.

  The turbine housing of the second embodiment is different from the first embodiment in the following points. That is, when the outlet side flange 23 is viewed from the front, the connecting portion center Q of the link member 35 with the shaft 32 at the outer end position of the shaft 32 (C is the central axis of the shaft) is The position and orientation of the hole 18a of the bush mounting portion 18 are set so as to be positioned on an imaginary line L passing through the center of the outlet port 13 and the center of the waste gate port 15 (hidden under the waste gate valve 34). Has been. 7 and 8 are exactly the same, and the difference between the two is that the bush 31 and the bush mounting portion 18 are disposed above the imaginary line L in the example of FIG. In the example of FIG. 8, the bush 31 and the bush mounting portion 18 are merely located below the virtual line L.

  In the second embodiment of FIGS. 7 and 8, the center Q of the link portion 35 with the shaft 32 passes through the center of the outlet port 13 and the center of the waste gate port 15 when the outlet side flange 23 is viewed from the front. The waste gate mechanism 30 is mounted on the housing body 10 so as to be positioned on the imaginary line L. For this reason, even if the downstream exhaust system component connected to the outlet flange 23 exerts an external force on the turbine housing based on deformation due to thermal expansion or the like, the imaginary line L that is the central axis of the housing torsion caused by the external force Since the connecting portion center Q is located at the center, the connecting portion center Q is not essentially displaced. Therefore, even if the turbine housing is twisted due to an external force from the downstream exhaust system parts, the valve opening start pressure of the waste gate valve 34 does not change.

[Third Embodiment]
FIG. 9 is a front view of the turbine housing (with the waste gate mechanism 30 mounted) according to the third embodiment when the outlet flange 23 is viewed from the front. The first and second embodiments are positioned as the best mode of the present invention, whereas the third embodiment is positioned as the better mode of the present invention.

  As in the first embodiment, the turbine housing according to the third embodiment includes a housing body 10 including a scroll portion 11, an outlet case portion 12, a first columnar portion 14, a second columnar portion 16, and a bush mounting portion 18. In addition, a waste gate mechanism 30 including a bush 31, a shaft 32, a valve arm 33, a waste gate valve 34 as a dish-shaped valve and a short lever-like link member 35 is provided. Further, when the outlet side flange 23 is viewed from the front, the housing twisting of the outlet port 13 and the waste gate port 15 that pass straight through the centers of the outlet port 13 and the waste gate port 15 that are open to the outlet side space S surrounded by the outlet side flange 23. The point which can assume the virtual line L as a central axis is the same as that of the said 1st Embodiment.

  The turbine housing of the third embodiment is different from the first embodiment in the following points. That is, when the outlet side flange 23 is viewed from the front, the intermediate portion of the link member 35 between the connecting portion center P of the link member 35 and the actuator rod 37 and the connecting portion center Q of the shaft 32 is the outlet port. 13 and the position and orientation of the hole 18a of the bush mounting portion 18 and the link member 35 so as to be located on an imaginary line L passing through the center of the waste gate port 15 (hidden under the waste gate valve 34). The length of is set. That is, in FIG. 9, the imaginary line L connecting the outlet port center and the waste gate port center passes between the connecting portion center P with the supercharging pressure control actuator 36 and the connecting portion center Q with the shaft 32. 31 is attached. The configuration of the third embodiment can be regarded as an intermediate configuration between the first embodiment and the second embodiment.

  In the third embodiment, when the downstream exhaust system component connected to the outlet flange 23 exerts an external force on the turbine housing based on deformation due to thermal expansion or the like, an imaginary line that is a central axis of housing torsion caused by the external force Since neither the connecting part center P nor Q of the link member 35 is positioned on L, the connecting part centers P and Q are misaligned before and after the downstream exhaust system parts are deformed due to thermal expansion or the like. It is inevitable to cause. However, by adopting a suboptimal structure in which the imaginary line L passes between the two connection part centers P and Q, the degree of positional deviation between the two connection part centers P and Q is suppressed to be relatively small. Therefore, even if the turbine housing is twisted due to the external force from the downstream exhaust system parts, the change in the valve opening start pressure of the waste gate valve 34 is kept small.

[Conventional example]
FIG. 10 shows a conventional turbine housing outside the scope of the present invention, and is a front view when the outlet side flange 23 is viewed from the front. Even in this conventional example, when the outlet side flange 23 is viewed from the front, the outlet port 13 and the waste gate port 15 (under the waste gate valve 34) opened in the outlet side space S surrounded by the outlet side flange 23. It is the same as in the first to third embodiments in that an imaginary line L can be assumed as a central axis of housing torsion that passes straight through the center of each (hidden). However, as shown in FIG. 10, in the conventional example, the bush 31 and the bush mounting portion 18 are provided at positions away from the imaginary line L. As a result, the imaginary line L is connected to the link member 35. Neither the connecting part center P with the actuator rod 37 nor the connecting part center Q with the shaft 32 passes through, nor does it pass between the connecting part center P and the connecting part center Q.

  According to the conventional example of FIG. 10, when the downstream exhaust system component connected to the outlet flange 23 exerts an external force on the turbine housing based on deformation due to thermal expansion or the like, the central axis of the housing twist caused by the external force Since the connection part centers P and Q of the link member 35 are located at a position considerably away from a certain virtual line L, the connection part centers P and Q are before the downstream exhaust system parts are deformed due to thermal expansion or the like. There will be a significant misalignment later. The degree of the positional deviation is much larger than in the case of the third embodiment. Therefore, the turbine housing of FIG. 10 has a problem that the valve opening start pressure of the waste gate valve 34 greatly changes when the turbine housing is twisted by an external force from the downstream exhaust system parts.

  [Modification] In the first to third embodiments, the link member 35 is a short lever-shaped member, but the link member 35 is not limited to the lever-shaped member. For example, when the operation transmission structure from the supercharging pressure control actuator 36 to the shaft 32 is configured by a rack and pinion instead of the combination of the short lever-like link member 35 and the actuator rod 37, the end portion of the shaft 32 The pinion gear attached to the shaft corresponds to the link member.

  [Modification]: In the first to third embodiments, the imaginary line L is located closer to the scroll part 11 than the joining surface 23a of the outlet side flange, but the imaginary line L is the joining surface of the outlet side flange. It may be a straight line included in a plane flush with 23a.

The front view of the turbine housing (single unit) of 1st Embodiment. The right view of the turbine housing (single unit) of 1st Embodiment. The bottom view of the turbine housing (single unit) of a 1st embodiment. The rear view of the turbine housing (single unit) of a 1st embodiment. The front view of the turbine housing with a wastegate mechanism of a 1st embodiment. The right view of the turbine housing with a wastegate mechanism of 1st Embodiment. The front view of the turbine housing with a wastegate mechanism of 2nd Embodiment. The front view of the turbine housing with a wastegate mechanism of 2nd Embodiment. The front view of the turbine housing with a wastegate mechanism of 3rd Embodiment. The front view of the turbine housing with a wastegate mechanism of a prior art example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Housing main body, 13 ... Outlet port, 15 ... Waste gate port, 18 ... Bush mounting part, 21 ... Inlet side flange, 23 ... Outlet side flange, 30 ... Waste gate mechanism, 31 ... Bush, 32 ... Shaft, 33 ... Valve arm, 34 ... Wastegate valve, 35 ... Link member, 36 ... Supercharging pressure control actuator, 37 ... Actuator rod, C ... Center axis of shaft, L ... Virtual line passing through outlet port center and wastegate port center, P: Link portion center of the link member with the supercharging pressure control actuator, Q: Link portion center of the link member with the shaft, S: Exit side space.

Claims (3)

A turbine body, an outlet port that is an exhaust gas outlet of the turbine chamber, a waste gate port that communicates the upstream side of the turbine chamber with the outlet side of the turbine chamber, and a housing body having a bush mounting portion provided in the vicinity of the waste gate port; ,
An outlet-side flange provided on the outlet side of the housing body to connect downstream exhaust system components to the housing body;
A waste having a bush attached to the bush attachment portion, a shaft supported by the bush, a waste gate valve for opening and closing the waste gate port provided at one end of the shaft, and a link member provided at the other end of the shaft A turbine housing comprising a gate mechanism ,
A wastegate port that communicates the first columnar portion of the housing body defining the outlet port that is an exhaust gas outlet of the turbine chamber and the upstream side of the turbine chamber to the outlet side of the turbine chamber. In the turbine housing integrated with the main part of the housing body partitioning the turbine chamber via the second columnar portion of the housing body partitioning ,
When the connection part (P) with the supercharging pressure control actuator in the link member constituting the waste gate mechanism is viewed from the direction in which the outlet side flange is the front, the center of the outlet port and the center of the waste gate port A turbine housing, wherein a bush of the waste gate mechanism is attached to a bush attachment portion of the housing body so as to be located on an imaginary line (L) passing through the housing. A turbine body, an outlet port that is an exhaust gas outlet of the turbine chamber, a waste gate port that communicates the upstream side of the turbine chamber with the outlet side of the turbine chamber, and a housing body having a bush mounting portion provided in the vicinity of the waste gate port; ,
An outlet-side flange provided on the outlet side of the housing body to connect downstream exhaust system components to the housing body;
A waste having a bush attached to the bush attachment portion, a shaft supported by the bush, a waste gate valve for opening and closing the waste gate port provided at one end of the shaft, and a link member provided at the other end of the shaft A turbine housing comprising a gate mechanism ,
A wastegate port that communicates the first columnar portion of the housing body defining the outlet port that is an exhaust gas outlet of the turbine chamber and the upstream side of the turbine chamber to the outlet side of the turbine chamber. In the turbine housing integrated with the main part of the housing body partitioning the turbine chamber via the second columnar portion of the housing body partitioning ,
When the connecting portion (Q) of the link member constituting the waste gate mechanism with the shaft is viewed from a direction in which the outlet flange is the front surface, a virtual passage that passes through the center of the outlet port and the center of the waste gate port. A turbine housing, wherein a bush of the waste gate mechanism is attached to a bush attachment portion of the housing body so as to be positioned on a line (L). A turbine body, an outlet port that is an exhaust gas outlet of the turbine chamber, a waste gate port that communicates the upstream side of the turbine chamber with the outlet side of the turbine chamber, and a housing body having a bush mounting portion provided in the vicinity of the waste gate port; ,
An outlet-side flange provided on the outlet side of the housing body to connect downstream exhaust system components to the housing body;
A waste having a bush attached to the bush attachment portion, a shaft supported by the bush, a waste gate valve for opening and closing the waste gate port provided at one end of the shaft, and a link member provided at the other end of the shaft A turbine housing comprising a gate mechanism ,
A wastegate port that communicates the first columnar portion of the housing body defining the outlet port that is an exhaust gas outlet of the turbine chamber and the upstream side of the turbine chamber to the outlet side of the turbine chamber. In the turbine housing integrated with the main part of the housing body partitioning the turbine chamber via the second columnar portion of the housing body partitioning ,
An intermediate portion of the link member between the connecting portion (P) of the link member constituting the waste gate mechanism and the supercharging pressure control actuator and the connecting portion (Q) of the shaft faces the outlet flange. The bush of the waste gate mechanism is attached to the bush mounting portion of the housing body so that it is located on a virtual line (L) passing through the center of the outlet port and the center of the waste gate port when viewed from the direction A turbine housing characterized by being provided.

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