Abstract: A guide bar for a chainsaw has a middle section which forms a groove base of a guide groove. The middle section has an edge layer which includes at least one hardened region extending from a first end having a first edge layer depth to a second end having a second edge layer depth. The first edge layer depth at the first end is less than the second edge layer depth at the second end. The second edge layer depth at the second end is greater than 1 mm. The first edge layer depth at the first end of the hardened region is at most 3 mm.

Abstract: A compressor wheel for an internal combustion engine may include a plurality of blades which in a circumferential direction of the wheel are spaced from one another. The plurality of blades may respectively include an inflow edge which during operation are subject to an inflow of a compressible fluid substantially axially to the wheel axis. The plurality of blades may include a surface layer of locally distinct materials to adapt to locally distinct loads during operation.

Abstract: A turbine housing for an exhaust gas turbocharger may include a wastegate valve that may have at least two apertures. A first aperture may be configured to receive a wastegate shaft and a second aperture may be configured as an inlet to a bypass channel. An insert may include a valve seat for the wastegate valve and a bearing bush for mounting the wastegate shaft. The valve seat may be mounted by a matching valve disc. The valve seat may cover the second aperture and the bearing bush may cover the first aperture in an installed state of the insert.

Abstract: A compressor wheel for an internal combustion engine may include a plurality of blades which in a circumferential direction of the wheel are spaced from one another. The plurality of blades may respectively include an inflow edge which during operation are subject to an inflow of a compressible fluid substantially axially to the wheel axis. The plurality of blades may include a surface layer of locally distinct materials to adapt to locally distinct loads during operation.

Abstract: A rotor for a charging device may include a shaft, a turbine wheel and a compressor wheel. The turbine wheel may be connected to the shaft. The rotor may also include at least one of a metal or ceramic adapter connected to the turbine wheel or the shaft via an infiltration process.

Abstract: The present invention relates to an exhaust gas turbocharger having a turbine wheel that is rotatably mounted about an axis of rotation and a turbine housing. The turbine wheel expands a combustion engine exhaust gas while the turbine housing includes a high-pressure region and a low-pressure region. Additionally, the turbine wheel is arranged between the high-pressure region and the low-pressure region, and wherein the low-pressure region has an inner shell conducting the exhaust gas and an outer shell, which is arranged for forming an air gap insulation.

Abstract: A method for manufacturing a lightweight valve is provided. The lightweight valve includes a valve stem, a hollow valve cone and a valve disk closing the valve cone, the valve stem being provided with a hollow space at an end facing the valve disk, the valve disk also having a force transmission element extending through the hollow valve cone into the stem hollow space. The method includes producing a first one-piece component forming the valve disk with the force transmission element by casting, forming and/or a powder metallurgy method, producing a second component forming the valve stem and the valve cone and joining the first and second components together and connecting them by a material, non-positive and/or positive connection.

Abstract: A lightweight valve (1), in particular for internal combustion engines, and a method for manufacturing the lightweight valve (1) are provided. The valve comprises a valve stem (3), a hollow valve cone (7) and a valve disk (13), the valve cone (7) and the valve disk (13) together forming a hollow space. The valve disk (13) is provided with a gripping receiver (23) for the valve stem (3).

Abstract: A lightweight valve (1), in particular for internal combustion engines, is provided, with a valve stem (3), with a hollow valve cone (5) and with a valve disk (7) closing the valve cone hollow space on one side, a valve cone support being provided in the hollow space. The valve cone support is provided at a distance from the valve disk (7).

Abstract: In a turbine housing, for an exhaust gas turbocharger of an internal combustion engine with an exhaust gas guide section which has at least one spiral channel that can be coupled to an exhaust path of an exhaust tract and a reception chamber for accommodating a turbine wheel arranged downstream of the at least one spiral channel, at least one first and one second partial housing are provided, which include complementary wall regions of the at least one spiral channel and which are joined so as to form the at least one spiral channel. Also, an exhaust gas turbocharger with such a turbine housing is provided and a method for producing such a turbine housing.

Abstract: A multipart composite valve for an internal combustion engine, in which a valve shaft (2) and a valve plate (4) are embodied separately while being joined together in an overlapping area (6). The invention is characterized in that at least some parts of the valve shaft (2) are provided with an intermediate layer (8) in the overlapping area (6). Said intermediate layer (8) forms an integral joint with both the valve shaft (2) and the valve plate (4) in the form of a chemical bond, the valve plate (4) being cast onto the valve shaft (2).

Abstract: A method for producing a contoured gap between a rotor and a stator of a turbo-engine is provided. A first turbo-engine drives a second turbo-engine by means of a common shaft, the shaft being mounted in a bearing housing by means of a bearing. The aim of the invention is to enable the contoured gap to be created in a simple and reliable manner. To this end, the contoured gap is formed between a contoured surface of the rotor and a contoured surface of an engine housing associated with the rotor, by grinding the contoured surfaces against each other, using the axial play of the bearing.

Abstract: In a secondary air supply device comprising a turbine and a compressor with turbine and compressor wheels having blades which are covered by wheel covers and an air filter structure disposed between the turbine and compressor wheels, so that air is supplied to the compressor and to the turbine from a common filter structure disposed between the compressor and the turbine wheels.

Abstract: A lightweight valve (1), in particular for internal combustion engines, is provided, with a valve stem (3), with a hollow valve cone (5) and with a valve disk (7) closing the valve cone hollow space on one side, a valve cone support being provided in the hollow space. The valve cone support is provided at a distance from the valve disk (7).

Abstract: In a compressor and turbine wheel for a secondary air feed device formed as a single component, a rotor which includes a center disc structure consisting of at least two discs of different materials is provided at one side with compressor blades and on the opposite side with turbine blades, and the discs consist of an alloy based on Al, Mg, Ti, Fe, or Ni and are preferably arranged in axially spaced relationship with a disc carrier of a plastic material disposed in the space between the two bladed discs.

Abstract: In an exhaust gas turbocharger for an internal combustion engine, with a turbine wheel arranged in the exhaust gas stream of the engine and including a heat-resistant light metal alloy, with a compressor wheel arranged in the intake air stream of the engine, with a shaft including steel, the compressor wheel being seated on the shaft and the turbine wheel being connected to the shaft by welding, and with a mounting for the shaft, a hub adapted to the shaft diameter is formed on the turbine wheel, the connection point between the hub of the turbine wheel and the shaft being arranged in the vicinity of the mounting.

Abstract: A lightweight valve (1), in particular for internal combustion engines, is provided, with a valve stem (3), with a hollow valve cone (5) and with a valve disk (7) closing the valve cone (5), the valve disk (7) being provided with a recess (23) on its flat side facing the valve cone (5). The lightweight valve (1) has a valve cone (5) projecting with its end region of greater diameter into the recess (23).

Abstract: In a secondary air delivery device for an internal combustion engine comprising a secondary air charger with a compressor and a turbine which is driven by the vacuum generated in the engine intake duct and which drives the compressor that delivers secondary air to the engine exhaust duct, wherein the engine intake air duct includes an air filter for filtering the air supplied to the engine, a separate air filter structure is provided for filtering the air supplied to the compressor and to the turbine which air filter structure is accommodated in the housing of the secondary air charger.

Abstract: A lightweight valve (1), in particular for internal combustion engines, and a method for manufacturing the lightweight valve (1) are provided. The valve comprises a valve stem (3), a hollow valve cone (7) and a valve disk (13), the valve cone (7) and the valve disk (13) together forming a hollow space. The valve disk (13) is provided with a gripping receiver (23) for the valve stem (3).

Abstract: A lightweight valve (1) for internal combustion engines is provided, which comprises a valve stem (3), a hollow valve cone (7) and a valve disk (9) closing the valve cone (7). In this connection, the valve stem (3) is provided with a hollow space (5) at its end facing the valve disk (9). The lightweight valve (1) is characterized by at least one force transmission element (19) which is provided on the valve disk (9) and extends through the hollow valve cone (7) into the stem hollow space (5).