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AssigneeDaimlerChrysler AG
InventorsErwin Schmidt, Siegfried Sumser
Estimating the term…
An exhaust-gas turbocharger for an internal combustion engine has a turbine having a variable turbine geometry for the variable setting of the effective flow inlet cross section to the turbine wheel. The exhaust-gas turbocharger has a compressor which is connected to the turbine via a shaft. The variable turbine geometry can be adjusted by means of a regulating device between a closed position and an open position. To compensate for wear, a stop limiting an end position of the variable turbine geometry is provided, and the position of this stop can be set in a variable manner.
An exhaust-gas turbocharger for an internal combustion engine, having an exhaust-gas turbine which is provided with variable turbine geometry for variable setting of an effective flow inlet cross section to a turbine wheel, and having a compressor which is connected to the exhaust-gas turbine via a shaft, the variable turbine geometry being adjustable by a regulating device between a closed position reducing the flow inlet cross section and an open position widening the flow inlet cross section,
An exhaust-gas turbocharger for an internal combustion engine, having an exhaust-gas turbine which is provided with variable turbine geometry for variable setting of an effective flow inlet cross section to a turbine wheel, and having a compressor which is connected to the exhaust-gas turbine via a shaft, the variable turbine geometry being adjustable by a regulating device between a closed position reducing the flow inlet cross section and an open position widening the flow inlet cross section,
An exhaust-gas turbocharger for an internal combustion engine, having an exhaust-gas turbine which is provided with variable turbine geometry for variable setting of an effective flow inlet cross section to a turbine wheel, and having a compressor which is connected to the exhaust-gas turbine via a shaft, the variable turbine geometry being adjustable by a regulating device between a closed position reducing the flow inlet cross section and an open position widening the flow inlet cross section,
An exhaust-gas turbocharger for an internal combustion engine, having an exhaust-gas turbine which is provided with variable turbine geometry for variable setting of an effective flow inlet cross section to a turbine wheel, and having a compressor which is connected to the exhaust-gas turbine via a shaft, the variable turbine geometry being adjustable by a regulating device between a closed position reducing the flow inlet cross section and an open position widening the flow inlet cross section,
A method of operating an exhaust-gas turbocharger for an internal combustion engine which is provided with a variable turbine geometry which is set in a variable manner and/is adjusted as a function of characteristic quantities of at least one of the exhaust-gas turbocharger and the internal combustion engine between a closed position reducing a flow inlet cross section to the turbine wheel and an open position widening the flow inlet cross section,
A method of operating an exhaust-gas turbocharger for an internal combustion engine which is provided with a variable turbine geometry which is set in a variable manner and/is adjusted as a function of characteristic quantities of at least one of the exhaust-gas turbocharger and the internal combustion engine between a closed position reducing a flow inlet cross section to the turbine wheel and an open position widening the flow inlet cross section,
A method of operating an exhaust-gas turbocharger for an internal combustion engine which is provided with a variable turbine geometry which is set in a variable manner and/is adjusted as a function of characteristic quantities of at least one of the exhaust-gas turbocharger and the internal combustion engine between a closed position reducing a flow inlet cross section to the turbine wheel and an open position widening the flow inlet cross section,
A method of operating an exhaust-gas turbocharger for an internal combustion engine which is provided with a variable turbine geometry which is set in a variable manner and/is adjusted as a function of characteristic quantities of at least one of the exhaust-gas turbocharger and the internal combustion engine between a closed position reducing a flow inlet cross section to the turbine wheel and an open position widening the flow inlet cross section,
Dependencies are inferred from the claim text.
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Control of the pumps: by using pumps or turbines with adjustable guide vanes
Final actuators: arranged in stator parts
By means of nozzle vanes: for radial flow, i.e. the vanes turning around axes which are essentially parallel to the rotor centre line
Supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant: turbochargers, i.e. plants for…
Term ended 23 Jul 2021 (estimated)
This application claims the priority of German Patent Document 100 35 762.8, filed in Germany, Jul. 22, 2000, the disclosure of which is expressly incorporated by reference herein.
The invention relates to an exhaust-gas turbocharger for an internal combustion engine and a method of operating an exhaust-gas turbocharger. Preferred embodiments of the invention relate to an exhaust-gas turbocharger for an internal combustion engine, having an exhaust-gas turbine which is provided with variable turbine geometry for variable setting of an effective flow inlet cross section to a turbine wheel, and having a compressor which is connected to the exhaust-gas turbine via a shaft, the variable turbine geometry being adjustable by a regulating device between a closed position reducing the flow inlet cross section and an open position widening the flow inlet cross section.
Preferred embodiments of the invention also relate to a method of operating an exhaust-gas turbocharger for an internal combustion engine which is provided with a variable turbine geometry which can be set in a variable manner and can be adjusted as a function of characteristic quantities of the exhaust-gas turbocharger and/or of the internal combustion engine between a closed position reducing a flow inlet cross section to the turbine wheel and an open position widening the flow inlet cross section.
FIG. 1 shows a schematic representation of an internal combustion engine with exhaust-gas turbocharger with variable turbine geometry constructed according to a preferred embodiment of the invention, having a counting and analyzing unit in which the number of actuations of the turbine geometry is determined and processed;
FIG. 2 shows a view of a turbine wheel in a turbine, having a variable turbine geometry which is designed as a radial guide cascade with adjustable blades and can be adjusted between closed position and open position via a regulating device which is movable between two stops, in accordance with preferred embodiments of the invention;
FIG. 3 shows a graph with the profile of the engine braking power as a function of the wear of the variable turbine geometry plotted against the engine speed;
Assigned to the internal combustion engine 1 shown in FIG. 1 is an exhaust-gas turbocharger 2 which comprises a turbine 3 arranged in an exhaust-gas line 4 and a compressor 5 arranged in an intake duct 6, the turbine 3 and compressor 5 being connected to one another via a shaft 7. The turbine 3 in the exhaust-gas line 4 is provided with a variable turbine geometry 12 for the variable setting of the effective turbine flow inlet cross section. The variable turbine geometry 12 can be set via a regulating device 8.
A charge-air cooler 13 is arranged in the intake duct 6 downstream of the compressor 5.
Furthermore, an exhaust-gas recycling arrangement 14, comprising a recycling line 15 in which a shut-off valve 16 and a cooler 17 are arranged, is provided between exhaust-gas line 4 and intake duct 6.