IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0630751
(2009-12-03)
|
등록번호 |
US-8105020
(2012-01-31)
|
우선권정보 |
GB-0710670.1 (2007-06-05) |
발명자
/ 주소 |
- Bywater, John Michael
- Garrett, Stephen
- Carr, Henry David Lambton
|
출원인 / 주소 |
- Cummins Turbo Technologies Limited
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
8 |
초록
▼
A turbocharger comprises a turbine wheel (5) mounted within a housing assembly (1, 3) for rotation about a turbine axis, a gas flow inlet passage (8) upstream of the turbine wheel (5), and a gas flow control mechanism (10, 16, 32) located within the housing assembly (1, 3) upstream of the turbine wh
A turbocharger comprises a turbine wheel (5) mounted within a housing assembly (1, 3) for rotation about a turbine axis, a gas flow inlet passage (8) upstream of the turbine wheel (5), and a gas flow control mechanism (10, 16, 32) located within the housing assembly (1, 3) upstream of the turbine wheel (5) and operable to control gas flow through said gas flow inlet passage (9). An actuator assembly is mounted to the housing assembly and comprises: A lead screw including a lead screw shaft (37) defining a lead screw axis, and a lead screw nut (36) threadedly engaged on a threaded portion of the lead screw shaft (37). The lead screw (36, 37) being arranged so that rotation of one of said shaft and nut relative to the housing assembly produces linear movement in the other of said shaft and nut in the direction of the lead screw axis: The lead screw (36, 37) engages the gas flow control mechanism (10, 16, 32) at a location within a housing cavity defined within said housing assembly (1, 3).
대표청구항
▼
1. A turbocharger comprising a turbine wheel mounted within a housing assembly for rotation about a turbine axis, a gas flow inlet passage upstream of said turbine wheel, and a gas flow control mechanism located within said housing assembly upstream of said turbine wheel and operable to control gas
1. A turbocharger comprising a turbine wheel mounted within a housing assembly for rotation about a turbine axis, a gas flow inlet passage upstream of said turbine wheel, and a gas flow control mechanism located within said housing assembly upstream of said turbine wheel and operable to control gas flow through said gas flow inlet passage, and an actuator assembly mounted to the housing assembly comprising: a lead screw including a lead screw shaft defining a lead screw axis, and a lead screw nut threadedly engaged on a threaded portion of the lead screw shaft, the lead screw being arranged so that rotation of one of said shaft and nut relative to the housing assembly produces linear movement in the other of said shaft and nut in the direction of the lead screw axis, the lead screw engaging the gas flow control mechanism at a location within a housing cavity defined within said housing assembly; andwherein the housing assembly comprises a turbine housing, a compressor housing, and a bearing housing located between the turbine housing and the compressor housing, and wherein said housing cavity is defined within the bearing housing. 2. A turbocharger according to claim 1wherein the lead screw shaft axis extends at an oblique angle to the turbine axis. 3. A turbocharger according to claim 1, wherein the threaded portion of the lead screw shaft has a thread with a single start. 4. A turbocharger comprising a turbine wheel mounted within a housing assembly for rotation about a turbine axis, a gas flow inlet passage upstream of said turbine wheel, and a gas flow control mechanism located within said housing assembly upstream of said turbine wheel and operable to control gas flow through said gas flow inlet passage, and an actuator assembly mounted to the housing assembly comprising: a lead screw including a lead screw shaft defining a lead screw axis, and a lead screw nut threadedly engaged on a threaded portion of the lead screw shaft, the lead screw being arranged so that rotation of one of said shaft and nut relative to the housing assembly produces linear movement in the other of said shaft and nut in the direction of the lead screw axis, the lead screw engaging the gas flow control mechanism at a location within a housing cavity defined within said housing assembly;wherein a motor is provided to rotate one of the lead screw shaft and lead screw nut to produce linear motion in the other of the lead screw shaft and lead screw nut; andwherein the motor rotates the lead screw shaft and the lead screw nut engages the gas flow control mechanism. 5. A turbocharger comprising a turbine wheel mounted within a housing assembly for rotation about a turbine axis, a gas flow inlet passage upstream of said turbine wheel, and a gas flow control mechanism located within said housing assembly upstream of said turbine wheel and operable to control gas flow through said gas flow inlet passage, and an actuator assembly mounted to the housing assembly comprising: a lead screw including a lead screw shaft defining a lead screw axis, and a lead screw nut threadedly engaged on a threaded portion of the lead screw shaft, the lead screw being arranged so that rotation of one of said shaft and nut relative to the housing assembly produces linear movement in the other of said shaft and nut in the direction of the lead screw axis, the lead screw engaging the gas flow control mechanism at a location within a housing cavity defined within said housing assembly;wherein a motor is provided to rotate one of the lead screw shaft and lead screw nut to produce linear motion in the other of the lead screw shaft and lead screw nut; andwherein the motor is mounted external to the housing assembly. 6. A turbocharger comprising a turbine wheel mounted within a housing assembly for rotation about a turbine axis, a gas flow inlet passage upstream of said turbine wheel, and a gas flow control mechanism located within said housing assembly upstream of said turbine wheel and operable to control gas flow through said gas flow inlet passage, and an actuator assembly mounted to the housing assembly comprising: a lead screw including a lead screw shaft defining a lead screw axis, and a lead screw nut threadedly engaged on a threaded portion of the lead screw shaft, the lead screw being arranged so that rotation of one of said shaft and nut relative to the housing assembly produces linear movement in the other of said shaft and nut in the direction of the lead screw axis, the lead screw engaging the gas flow control mechanism at a location within a housing cavity defined within said housing assembly; anda linkage between said gas flow control mechanism and said lead screw, said lead screw engaging said linkage at said location within the housing cavity. 7. A turbocharger comprising a turbine wheel mounted within a housing assembly for rotation about a turbine axis, a gas flow inlet passage upstream of said turbine wheel, and a gas flow control mechanism located within said housing assembly upstream of said turbine wheel and operable to control gas flow through said gas flow inlet passage, and an actuator assembly mounted to the housing assembly comprising: a lead screw including a lead screw shaft defining a lead screw axis, and a lead screw nut threadedly engaged on a threaded portion of the lead screw shaft, the lead screw being arranged so that rotation of one of said shaft and nut relative to the housing assembly produces linear movement in the other of said shaft and nut in the direction of the lead screw axis, the lead screw engaging the gas flow control mechanism at a location within a housing cavity defined within said housing assembly, wherein said gas flow control mechanism comprises a variable geometry mechanism for varying the size of the inlet passage, and wherein said inlet passage is annular and surrounds the turbine wheel, and said variable geometry mechanism includes an annular wall member which is displaceable in a direction parallel to the turbine axis to vary the width of the annular inlet passage between a first surface defined by the annular wall member and a second surface defined by the housing assembly; anda linkage comprising at least one axially displaceable rod on which the movable wall member is mounted, a yoke pivotally supported within the housing cavity and defining at least one arm which extends into engagement with a respective rod, wherein the lead screw engages the yoke at said location within the housing cavity such that linear motion of the lead screw pivots said yoke relative to the housing to thereby control position of the annular wall member. 8. A turbocharger according to claim 7, wherein the yoke is pivotally mounted on a shaft supported by the housing. 9. A turbocharger according to claim 8, wherein the yoke floats on said shaft which is non-rotatably supported by the housing. 10. A turbocharger according to claim 9, wherein opposite ends of said shaft are supported by internal walls of the housing assembly. 11. A turbocharger according to claim 10, wherein said walls are provided with a substantially “v” shaped notch or groove within which a respective end of the shaft sits, the shaft being secured in position by a bolt or the like inserted through a hole at a respective end of the shaft and into said housing wall at the bottom of the “v” shaped notch or groove. 12. A turbocharger comprising a turbine wheel mounted within a housing assembly for rotation about a turbine axis, a gas flow inlet passage upstream of said turbine wheel, and a gas flow control mechanism located within said housing assembly upstream of said turbine wheel and operable to control gas flow through said gas flow inlet passage, and an actuator assembly mounted to the housing assembly comprising: a lead screw including a lead screw shaft defining a lead screw axis, and a lead screw nut threadedly engaged on a threaded portion of the lead screw shaft, the lead screw being arranged so that rotation of one of said shaft and nut relative to the housing assembly produces linear movement in the other of said shaft and nut in the direction of the lead screw axis, the lead screw engaging the gas flow control mechanism at a location within a housing cavity defined within said housing assembly;said gas flow control mechanism comprising a variable geometry mechanism for varying the size of the inlet passage, said inlet passage being annular and surrounding the turbine wheel, said variable geometry mechanism including an annular wall member which is displaceable in a direction parallel to the turbine axis to vary the width of the annular inlet passage between a first surface defined by the annular wall member and a second surface defined by the housing assembly, and a linkage comprising at least one axially displaceable rod on which the movable wall member is mounted, a yoke pivotally supported within the housing cavity and defining at least one arm which extends into engagement with a respective rod, wherein the lead screw engages the yoke at said location within the housing cavity such that linear motion of the lead screw pivots said yoke relative to the housing to thereby control position of the annular wall member, the yoke being pivotally mounted on a shaft supported by the housing, the yoke floating on said shaft which is non-rotatably supported by the housing, opposite ends of said shaft being supported by internal walls of the housing assembly;wherein said walls are provided with a substantially “v” shaped notch or groove within which a respective end of the shaft sits, the shaft being secured in position by a bolt or the like inserted through a hole at a respective end of the shaft and into said housing wall at the bottom of the “v” shaped notch or groove. 13. A turbocharger according to claim 12, wherein the housing assembly comprises a turbine housing, a compressor housing, and a bearing housing located between the turbine housing and the compressor housing, and wherein said housing cavity is defined within the bearing housing. 14. A turbocharger according to claim 12, wherein a motor is provided to rotate one of the lead screw shaft and lead screw nut to produce linear motion in the other of the lead screw shaft and lead screw nut. 15. A turbocharger according to claim 14, wherein the motor rotates the lead screw shaft and the lead screw nut engages the gas flow control mechanism. 16. A turbocharger according to claim 14, wherein the motor is mounted external to the housing assembly. 17. A turbocharger according to claim 12, further comprising a linkage between said gas flow control mechanism and said lead screw, said lead screw engaging said linkage at said location within the housing cavity. 18. A turbocharger according to claim 12, where the threaded portion of the lead screw shaft has a thread with a single start.
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