Torsten Hirth

Bio: Torsten Hirth is an academic researcher from Daimler AG. The author has contributed to research in topics: Turbine & Turbocharger. The author has an hindex of 5, co-authored 22 publications receiving 465 citations.

Exhaust-gas turbocharger for an internal combustion engine

Abstract: An exhaust gas turbocharger for an internal combustion engine has an exhaust gas turbine in the exhaust gas train and a compressor in the intake tract, whereby an adjustable throttle device is provided upstream from the compressor wheel, for regulating the air mass stream to be supplied. The throttle device comprises a first guide grid and a second guide grid in the inflow region to the compressor wheel. Each guide grid possesses an adjustable grid geometry.

Turbine for an exhaust gas turbocharger

Abstract: In a turbine for an exhaust gas turbocharger including a turbine wheel with a number of turbine wheel blades supported in a housing, which defines a first radial inlet flow channel and which includes in the radial inlet flow channel a variable guide vane structure for guiding exhaust gas radially onto the turbine wheel, and a second, semi-axial, flow channel for guiding exhaust gas semi-axially to the turbine wheel, the turbine wheel blades are arranged and sized so as to define between circumferentially adjacent blades, a flow passage with a flow cross-section which has a minimum at its inlet end

Exhaust-gas turbine in an exhaust-gas turbocharger

Abstract: In an exhaust-gas turbine of an exhaust-gas turbo-charger including a turbine wheel which is rotatably supported in a housing and to which exhaust gas can be supplied via an inlet channel and discharged out of the exhaust-gas turbine via an outlet duct, wherein a guide vane structure and an axial slide which interacts with the latter, are disposed in the turbine inlet at the transition from the inlet channel to the turbine wheel, the guide vane structure is fixedly mounted with respect to the housing and the axial slide is arranged at the turbine outlet side and is movably supported on an outlet duct contour sleeve and provided with an axial opening for accommodating the guide vane structure, and the contour sleeve includes openings which conduct exhaust gas from the inlet channel directly to the outlet duct and which are arranged so that they are covered by the axial slide when the axial slide is moved out of its open position, the guide vane structure extending axially over the contour sleeve openings so as to impart a swirl to the exhaust gas being discharged via the contour sleeve openings when the slide member is in an open position.

Abgasturbine in einem Abgasturbolader

Abstract: Eine Abgasturbine (3) in einem Abgasturbolader (2) ist mit einem in einem Gehause drehbar gelagerten Turbinenrad (14) versehen, dem uber eine Einlassflut (16) Abgas zufuhrbar ist, welches uber einen Austrittskanal (13) aus der Abgasturbine abfuhrbar ist. Im Turbineneintrittsquerschnitt (15) im Ubergang von der Einlassflut zu dem Turbinenrad ist ein Leitgitter (17) und ein damit zusammenwirkender Axialschieber (19) angeordnet. Das Leitgitter ist gehausefest montiert, der Axialschieber ist auf der dem Austrittskanal zugewandten Seite angeordnet. Die dem Austrittskanal abgewandte, gehausefeste Begrenzungswand (24) des Turbineneintrittsquerschnitts schliest axial bundig mit den Turbinenradschauf ein ab.

Turbine with a turbine wheel for an exhaust gas turbocharger of an internal combustion engine and exhaust gas turbocharger for an internal combustion engine

Abstract: The invention relates to a turbine with a turbine wheel for an exhaust gas turbocharger of an internal combustion engine, which comprises a hub, provided with turbine wheel blades and auxiliary blades, whereby said auxiliary blades are arranged on the hub in exhaust channels, delimited by two turbine wheel blades. According to said invention, the dimensions of the auxiliary blades (20) are fixed, whereby the ratio between a throughput parameter of the turbine wheel blades (6) and a throughput parameter of the auxiliary blades (20) is higher than 15. Said invention is mainly provided for exhaust gas turbochargers in the automotive industry.

Exhaust-gas turbocharger for an internal combustion engine

Abstract: An exhaust gas turbocharger for an internal combustion engine has an exhaust gas turbine in the exhaust gas train and a compressor in the intake tract, whereby an adjustable throttle device is provided upstream from the compressor wheel, for regulating the air mass stream to be supplied. The throttle device comprises a first guide grid and a second guide grid in the inflow region to the compressor wheel. Each guide grid possesses an adjustable grid geometry.

Variable geometry turbine

Abstract: A turbocharger variable geometry turbine of the type which includes nozzle vanes displaceable across the turbine inlet flow path into slots. The vanes have cut-outs which reduce the vane cord and permit peak turbine efficiency over a range of geometries.

Abgasturbolader für eine brennkraftmaschine

Abstract: Ein Abgasturbolader fur eine Brennkraftmaschine weist eine Turbine und einen von der Turbine angetriebenen Verdichter auf. Der Verdichter besteht aus einem Verdichterrad in einem Stromungskanal, wobei mindestens ein radial ausen am Verdichterrad in Achsrichtung des Rades verlaufender und mit dem Stromungskanal kommunizierender Uberstromkanal angeordnet ist. Zur variablen Einstellung des wirksamen Stromungsquerschnitts des Uberstromkanals ist ein aus zwei Teilringen bestehender Uberstromring vorgesehen, dessen Teilringe relativ zueinander verstellbar sind. DOLLAR A Um einen Abgasturbolader mit einem Verdichter mit einem erweiterten Kennfeld zu schaffen, ist in jedem Teilring mindestens eine den Uberstromkanal bildende, axial verlaufende Uberstromnut mit radialer Erstreckung im Teilring vorgesehen, wobei die Teilringe zwischen einer Uberdeckungsstellung und einer Sperrstellung verstellbar sind.

Internal combustion engine with an exhaust turbocharger and an exhaust-gas recirculation device

Abstract: In an internal combustion engine including an exhaust turbocharger and an exhaust-gas recirculation device, with an exhaust turbine and a compressor, the exhaust turbine has a plurality of inlet flow passages to which exhaust gas can be supplied via separate exhaust lines connected to some of the cylinders of the internal combustion engine In total, three flow passages are provided in the exhaust turbine, of which two communicate with the exhaust-gas recirculation device, and one of these flow passages includes an adjustable throttling member for regulating the mass flow of exhaust gas to be recirculated

Turbocharger and EGR System

Abstract: An exhaust gas recirculation system for an internal combustion engine. The present invention includes a turbocharger, restrictor valve, and exhaust gas recirculation valve. The restrictor valve is upstream of the turbine of the turbocharger, and restricts the flow of exhaust gas into the turbine. This restriction results in an increase in pressure of the exhaust gas provided to the restrictor valve. The increased pressure exhaust gas is provided to the inlet of an exhaust gas recirculation valve which may be actuatable independently of the actuation of the restrictor valve. The restrictor valve may be modulated until exhaust pressure is greater than the pressure of the intake gas. The restrictor valve creates a pressure differential suitable for recirculating a portion of exhaust gas through the EGR valve and into the intake manifold of the engine. The restrictor valve may also be operated without recirculation of exhaust gas, such as during cold starting of a diesel engine so as to increase the load on the engine and decrease the warm-up time of the engine. Some embodiments of the present invention utilize an electronic controller for operating the restrictor valve and the EGR valve.