A turbocharger actuator and method of calibrating for a variable nozzle turbocharger. Included are an actuator housing having a diaphragm connected across it, a piston, and a compression spring arranged to be generally centered in the actuator housing biasing the piston. Three rivets connect the act
A turbocharger actuator and method of calibrating for a variable nozzle turbocharger. Included are an actuator housing having a diaphragm connected across it, a piston, and a compression spring arranged to be generally centered in the actuator housing biasing the piston. Three rivets connect the actuator housing to a bracket. The diaphragm is crimped to connect to the actuator housing, which is coated with an elastomeric bead. The bracket includes three plate sections, the first having a plurality of rivet holes, and second two each having an elongated hole to receive an attachment bolt and allow sliding movement of the actuator assembly relative to the turbocharger housing.
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The invention claimed is: 1. A method of affixing an actuator that includes an actuator housing, an actuator port and a rod, to a variable nozzle turbocharger having a turbocharger housing and a pin crank, comprising the steps of: i) moving the actuator body to a calibrated position by a) applying
The invention claimed is: 1. A method of affixing an actuator that includes an actuator housing, an actuator port and a rod, to a variable nozzle turbocharger having a turbocharger housing and a pin crank, comprising the steps of: i) moving the actuator body to a calibrated position by a) applying a predetermined vacuum to the actuator, through the actuator port, to move the actuator rod to an actuated position with respect to the actuator housing, and b) positioning the rod with respect to the pin crank, c) wherein the calibrated position is determined by the position of the actuator body with the actuator rod in the actuated position with respect to the actuator housing, and with the rod positioned with respect to the pin crank; and ii) subsequent to the step of moving, fastening the actuator housing to the turbocharger housing in the calibrated position. 2. A method according to claim 1, and further comprising determining whether the actuator housing is fastened to the turbocharger housing in a correct position, and if it is not in a correct position, then: d) unfastening the actuator housing from the turbocharger housing; and e) repeating the process from step b) using a different predetermined vacuum. 3. A method according to claim 1, wherein the step of applying the predetermined vacuum is done after the step of positioning the rod. 4. A method of calibrating a variable nozzle turbocharger having a housing, a flow screw and a pin crank, comprising the steps of: a) using an actuator which has a rod; b) using at least one bolt to attach the actuator to the turbocharger so that the rod is adjacent to the pin crank; c) applying a predetermined vacuum to the actuator, through an actuator port, to allow the actuator to take a calibrated position determined by gravity; d) keeping the pin crank in contact with the flow screw of the turbocharger; e) tightening the or each bolt, at a predetermined torque, to tighten the attachment of the actuator assembly to the housing; and f) determining whether the calibration process is correct variable nozzle turbocharger is calibrated correctly, and if it is not correct calibrated correctly, then repeating the process from step c) using a different predetermined vacuum value. 5. A method according to claim 4, wherein in the step (b), the rod is spaded at one end and of a fixed length. 6. An actuator for a variable nozzle turbocharger having a turbocharger housing, comprising: an actuator housing; a piston; a diaphragm, connected across the actuator housing; at least one compression spring arranged to be generally centered in the actuator housing and to bias the piston; a rod, connected to the piston, for calibrating the turbocharger; and a bracket comprising a first plate section configured for fixedly connecting with the actuator housing, and a second section extending generally perpendicular to the first plate section and having an elongate hole formed therein to receive a means for attaching the bracket to the turbocharger housing, the elongate hole allowing a sliding movement of the actuator relative to the turbocharger housing. 7. An actuator according to claim 6, wherein the bracket further comprises a third section extending perpendicular to the first plate section and being generally parallel to the second section, the third section having an elongate hole formed therein to receive a bolt to attach the bracket to the turbocharger housing, the elongate hole allowing a sliding movement of the actuator relative to the turbocharger housing. 8. An actuator according to claim 6, wherein the elongate hole allows approximately 4 mm of sliding movement. 9. An actuator according to claim 6, wherein the actuator housing is connected to the bracket using at least one rivet. 10. An actuator according to claim 9, wherein the actuator housing is connected to the bracket using three rivets. 11. A turbocharger comprising a turbine, a compressor and an actuator, for controlling movement of the piston to control a gas inlet to the turbine or an air inlet to the compressor, wherein the actuator is configured according to claim 10. 12. An actuator according to claim 6, wherein the diaphragm is crimped to connect it to the actuator housing. 13. An actuator according to claim 6, wherein the diaphragm is coated with elastomer bead. 14. A turbocharger comprising a turbine, a compressor and an actuator, for controlling movement of the piston to control a gas inlet to the turbine or an air inlet to the compressor, wherein the actuator is configured according to claims 6, 7, 8, 9, 12, or 13. 15. A method of calibrating a variable nozzle turbocharger having a flow screw and a pin crank, comprising the steps of: a) using an actuator according to claims 6, 7, 8, 9, 10, 12, or 13; b) using at least one bolt to attach the actuator to the turbocharger so that the rod is 5 adjacent to the pin crank; c) applying a predetermined vacuum to the actuator, through an actuator port, to allow the actuator to take a calibrated position determined by gravity; d) keeping the pin crank in contact with the flow screw of the turbocharger; e) tightening the or each bolt, at a predetermined torque, to tighten the attachment of the actuator assembly to an end housing; and f) determining whether the variable nozzle turbocharger is calibrated correctly, and if it is not calibrated correctly, then repeating the process from step c) using a different predetermined vacuum value. 16. A method according to claim 15, wherein in the step (b), the rod is spaded at one end and of a fixed length. 17. An actuator according to claim 6, wherein the rod is spaded at one end and of a fixed length. 18. A turbocharger comprising a turbine, a compressor and an actuator, for controlling movement of the piston to control a gas inlet to the turbine or an air inlet to the compressor, wherein the actuator is configured according to claim 17. 19. An actuator according to claim 1, wherein: the bracket further comprises a third section extending perpendicular to the first plate section and being generally parallel to the second section, the third section having an elongate hole formed therein to receive a bolt to attach the bracket to the turbocharger housing, the elongate hole allowing a sliding movement of the actuator relative to the turbocharger housing; each elongate hole allows approximately 4 mm of sliding movement; the actuator housing is connected to the bracket using three rivets; the diaphragm is crimped to connect it to the actuator housing; the diaphragm is coated with elastomer bead; and the rod is spaded at one end and of a fixed length.
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이 특허에 인용된 특허 (10)
Vertanen Mark W., Adjustable actuator for a turbocharger.
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