Anti-rattle geometry for waste gate linkages using preloading technologies to reduce wear

摘要

A turbocharger assembly is disclosed with a connected lever. An actuator may be spaced away from the lever. An arm may extend from the actuator and may be connected to the lever by a preloaded joint. The joint may include a pin fixed to the lever or the arm. An opening may be provided in the lever or the arm to which the pin is not fixed. The pin may have a shaped section that matches the shape of the opening to provide selected degrees of freedom. A spring element may be engaged in the groove and may apply a force to the pin compensating for wear between the pin and the mating surface by pulling the pin into the opening under the force.

主权项

1. A turbocharger assembly comprising: a turbine housing defining a first flow path and a second flow path bypassing at least a part of the first flow path; a valve damper controlling flow through the second flow path; a valve shaft connected to the valve damper and extending out of the turbine housing; a lever connected to the valve shaft; a pin connected to and extending away from the lever; wherein the pin has a first section that is shaped as a frustum, and wherein the first section has a base that has a first diameter and the first section has a terminus opposite the base that has a second diameter that is smaller than the first diameter, and wherein the pin has a second cylindrical section that extends from the terminus, the second cylindrical section has a third diameter that is equal to the second diameter, wherein an annular groove is formed in the second cylindrical section; a first cylindrical section of the pin extends between the base and the lever, wherein the first cylindrical section has a fourth diameter that is larger than the first diameter; an actuator is mounted on the turbocharger assembly; an arm extends from the actuator and has an end with a first side and a second side; a conical opening is formed completely through the arm near the end from the first side to the second side, and the conical opening is tapered completely through the arm from the first side to the second side; the pin extends through the conical opening so that the first section engages the arm completely through the arm in conical opening; a spring element is engaged in the groove and engages the second side of the arm, and the spring element applies a force pulling the pin into the conical opening and compensating for wear between the pin and the arm by maintaining contact between the pin and the arm under the force; wherein the first cylindrical section is positioned on the first side of the arm and the spring has an operational bandwidth that maintains the force on the pin when the first cylindrical section is spaced away from the first side of the arm so that the first section contacts the arm in the conical opening, and wherein the operational bandwidth maintains the force on the pin when the first cylindrical section contacts the first side of the arm as a result of wear.