VNT FLOW CALIBRATION ADJUSTMENT
First Claim
1. A stop for limiting rotation of a crankshaft for adjusting geometry of a variable geometry turbine, the stop comprising:
- an aperture for receiving the crankshaft wherein the crankshaft has a rotational axis and wherein the aperture is centered on the rotational axis; and
a close stop surface extending from a first radius from the rotational axis to a second radius from the rotational axis, the close stop surface having a width in the axial direction;
wherein the close stop surface establishes a contact with a secured component set in a center housing of a turbocharger to limit rotation of the crankshaft and, correspondingly, to establish a close position for the variable geometry turbine.
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Accused Products
Abstract
An exemplary variable geometry turbine includes a turbine wheel; a variable geometry assembly that includes a rotatable control ring that has a slot and a plurality of vanes where each vane has a post pivotably controlled by rotation of the control ring and where adjacent vanes define nozzles to direct exhaust gas to the turbine wheel; a crankshaft that has a pin for receipt by the slot of the control ring where rotation of the crankshaft rotates the control ring; and a center housing that includes a rotatable stop fixed to the crankshaft and having a close stop surface, a secure component and a translatable shaft where the translatable shaft comprises an engagement mechanism to engage the rotatable stop; where translation of the shaft causes rotation of the crankshaft and where the close stop surface establishes a contact with the secure component to limit rotation of the crankshaft and to establish a closed limit for the vanes. Various other exemplary methods, devices, systems, etc., are also disclosed.
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Citations
20 Claims
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1. A stop for limiting rotation of a crankshaft for adjusting geometry of a variable geometry turbine, the stop comprising:
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an aperture for receiving the crankshaft wherein the crankshaft has a rotational axis and wherein the aperture is centered on the rotational axis; and a close stop surface extending from a first radius from the rotational axis to a second radius from the rotational axis, the close stop surface having a width in the axial direction; wherein the close stop surface establishes a contact with a secured component set in a center housing of a turbocharger to limit rotation of the crankshaft and, correspondingly, to establish a close position for the variable geometry turbine. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A variable geometry turbine comprising:
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a turbine wheel; a variable geometry assembly that comprises a rotatable control ring that comprises a slot and a plurality of vanes wherein each vane comprises a post pivotably controlled by rotation of the control ring and wherein adjacent vanes define nozzles to direct exhaust gas to the turbine wheel; a crankshaft that comprises a pin for receipt by the slot of the control ring wherein rotation of the crankshaft rotates the control ring; and a center housing that comprises a rotatable stop fixed to the crankshaft and having a close stop surface, a secure component and a translatable shaft wherein the translatable shaft comprises an engagement mechanism to engage the rotatable stop; wherein translation of the shaft causes rotation of the crankshaft and wherein the close stop surface establishes a contact with the secure component to limit rotation of the crankshaft and to establish a closed limit for the vanes. - View Dependent Claims (9, 10, 11, 12)
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13. A method comprising:
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actuating a variable geometry turbine controller to arrive at a close position; in response to the actuating, rotating a stop fixed to a crankshaft positioned in a center housing of the variable geometry turbine; and in response to the rotating, contacting the stop and a secure component set in the center housing to stop the rotation of the crankshaft and to arrive at the close position of the variable geometry turbine. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification