An articulating joint includes a linkage and a pin. The linkage includes a surface defining an opening. The pin extends along a pivot axis, and is disposed, at least in-part, in the hole. The pin has a core component made of a first material, and an outer component that at least partially circumferentially surrounds the core component and is made of a wear resistant material. The outer component includes a gradated sub-surface depth extending in a radial direction.

A waste gate valve actuator, that may be used for an exhaust gas turbocharger of a motor vehicle, may have a flap with a base surface to be supported on an edge of an inlet or outlet opening of a waste gate channel and a channel-side elevation, which at least in one cross section along its axial direction exhibits an outer contour with a first section and an adjoining section facing away from the base surface. The outer contour in the first section may have at least one outer tangent that includes a first angle deviating from zero with the axial direction, and in the second section may have at least two outer tangents spaced apart from each other in an axial direction that include the same second angle angle deviating from zero and the first angle with the axial direction, and/or wherein the elevation exhibits in particular a flat front surface facing away from the base surface, which in relation to the base surface-side floor surface of the elevation is offset toward a rotational axis of the flap.

A turbocharger has an annular bypass valve disposed in an annular portion of a bypass passage of the turbine housing. The turbine housing defines an exhaust gas chamber having separate half-annular first and second scrolls, and a portion of the bypass passage is sector-divided by a pair of dividing walls that create two 180-degree bypass sectors respectively connected to the first and second scrolls. Each dividing wall has a through-hole. The valve rotor defines a pair of valve members that close the through-holes when the bypass valve is fully closed. When the valve rotor begins to rotate toward an open position, first the valve members open the through-holes to connect the two bypass sectors, and then the bypass flow passages begin to open.

A charging device for an exhaust gas turbocharger of an internal combustion engine may include at least one variable turbine and compressor geometry and an adjusting device for adjusting the at least one variable turbine and compressor geometry. The adjusting device may include a minimum set limit, which defines a minimum set flow of the at least one variable turbine and compressor geometry for an exhaust gas driving the charging device, and a maximum set limit, which defines a maximum set flow of the at least one variable turbine and compressor geometry for the exhaust gas driving the charging device. The adjusting device may be designed such that at least one minimum set limit of the adjusting device and the maximum set limit of the adjusting dive are variably adjustable and readjustable.

A link mechanism includes: a first link portion including a first hole; a second link portion including a second hole; a rotary shaft of a rotating body attached to the first or second link portion; a spring arranged between the first link portion and the second link portion; and a connecting pin including: a larger-diameter portion located on the first link portion at a side opposite to the second link portion and the spring and having an outer diameter larger than an inner diameter of the first hole and an inner diameter of the second hole; a medium-diameter portion having an outer diameter smaller than that of the larger-diameter portion and at least partially located within the first hole; and a smaller-diameter portion having an outer diameter smaller than that of the medium-diameter portion and at least partially located within the second hole.

A valve device includes: a mounting plate including a rotary shaft; an insertion hole formed in the mounting plate; a valve including a shaft portion inserted into the insertion hole; a larger-diameter portion of the shaft portion, at least a part of the larger-diameter portion being located within the insertion hole; a smaller-diameter portion of the shaft portion, a diameter of the smaller-diameter portion being smaller than that of the larger-diameter portion; a stepped surface formed between the larger-diameter portion and the smaller-diameter portion on the shaft portion; and a position regulating portion provided on the smaller-diameter portion, the position regulating portion being attached on the smaller-diameter portion at a position spaced apart from the stepped surface in a central axis direction of the shaft portion.

Various methods for compensating variation in the geometry and position of linkages and valve seats in wastegate assemblies are provided. In one example, a method of operating a wastegate in an internal combustion engine comprises, at engine startup, placing a wastegate valve at a seat, recording a position of the seat and associating the seat position with one or more operating parameters, and modifying a position of a wastegate actuator based on the seat position throughout engine operation.

A lever for a VTG guide vane arrangement of a radial turbine with a main body with a fork-shaped coupling section with two limbs. A wear-resistant contact block is arranged on an inner side of at least one of the limbs. The wear-resistant contact block is designed for operative engagement with an adjusting ring of the VTG guide van arrangement, giving rise to the effect of increased wear resistance at least in the region of the engagement with the VTG guide vane arrangement. Furthermore, a VTG guide vane arrangement having such a lever, a radial turbine having such a VTG guide vane arrangement, and a supercharging device having such a radial turbine.

A turbocharger includes a turbine housing and a wastegate valve. The turbine housing defines two bypass passages. The wastegate valve opens and closes the two bypass passages. The turbine housing has a valve seat surface that is a flat surface that the wastegate valve contacts. The wastegate valve has a valve surface and a depression. The valve surface is a flat surface that faces the valve seat surface when the wastegate valve is in a closed state. The depression is depressed from the valve surface. The depression is located at a portion that faces a region located between openings of the two bypass passages when the wastegate valve is in the closed state.

A turbocharger wastegate actuator arm includes a first section made from a rigid composite material, a second section made from a rigid composite material, and a third section made from a flexible polymeric material positioned between and interconnecting the first and second sections and adapted to allow angular deflection of the first section relative to the second section, wherein a longitudinal axis of the first section and a longitudinal axis of the second section define a first angle when the actuator arm is in the first position and the longitudinal axis of the first section and the longitudinal axis of the second section define a second angle when the actuator arm is in the second position, the first angle being greater than the second angle.