Turbocharger wastegate actuator high temperature rod end with a spherical bearing and a method for operating the actuator

A high temperature turbocharger wastegate assembly, the wastegate assembly comprising an actuator comprising:

• an actuator housing;
• an actuator rod comprising a high-temperature stainless steel and having a rod end member in line therewith, the actuator rod defining a first end and a second end, and the rod end member being attached to the actuator rod at the second end;
• and
• the rod end member having a socket therein,
• wherein the socket defines an inner surface which has a spherical bearing therein;
• the spherical bearing is swaged into the socket;
• the spherical bearing comprises:
• an outer member having an outer surface and an inner surface, at least a portion of the inner surface of the outer member defining an inner engagement surface of the outer member,
• an inner member disposed within the outer member, the inner member being misalignable and rotatable in relation to the outer member, the inner member having an outer surface and an inner surface, at least a portion of the outer surface of the inner member defining an outer engagement surface of the inner member, the inner surface defining a bore through the inner member, and
• an area of engagement defined by an interface of the inner engagement surface of the outer member and outer engagement surface of the inner member,
• a bearing shaft is disposed in the bore of the inner member of the spherical bearing;
• the bearing shaft is pivotally engaging a pivot link having a first link end and a second link end, the pivot link having a first bore extending therethrough proximate the first link end, the bearing shaft extending through the first bore and pivotally engaging an inner surface defined by the first bore for rotation of the bearing shaft about a longitudinal axis of the bearing shaft;
• the bearing shaft is rotatable about a longitudinal central axis of the actuator rod;
• the pivot link has a second bore extending therethrough proximate the second link end of the pivot link, the second bore having an inner surface;
• and
• a wastegate shaft extends into and is pivotally mounted to an exhaust housing,
• the wastegate shaft having a wastegate that is secured thereto and rotates with the wastegate shaft, the wastegate shaft extending through the second bore of the pivot link and being secured to the inner surface of the second bore, the wastegate shaft having a longitudinal central axis,
• wherein extension of the second end of the actuator rod relative to the actuator housing results in the second end of the actuator rod moving along an arc swung about the longitudinal central axis of the wastegate shaft and therefore causes a lateral displacement of the second end of the actuator rod and causes the second link end of the pivot link to concurrently rotate about the longitudinal central axis of the wastegate shaft, thereby rotating the wastegate shaft which causes the wastegate to move between a closed position and an open position,
• wherein the spherical bearing enables movement of the bearing shaft in three dimensions, and
• wherein the actuator withstands temperatures in excess of 260° C. (500° F.) under high vibration.