Daimler Chrysler Ag

Daimler-benz Ag

Borgwarner Inc.

Mercedes-benz Aktiengesellschaft

Other

Basf Aktiengesellschaft

Daimlerchrylser Ag

Atlas Fahrzeugtechnik Gmbh

Mercedes-benz Aktiengesellscaft

Helmut Daudel

Siegfried Sumser

Helmut Finger

Peter Fledersbacher

Horst Bergmann

Joseph Spurk

Stephan Schenkel

Ralf Koch

Erwin Schmidt

Bernd Morsbach

Hermann Hiereth

Wolfgang Erdmann

Burkhard Brandner

Uwe Gaertner

Hans Erdmannsdorfer

Paul Löffler

Paul L&ouml;ffler

Roland Bischoff

Uwe Gartner

Paul Loeffler

Hans-Josef Hemer

Carsten Funke

Klaus-Jurgen Marquardt

Alfred Normann

Gebhard Bopp

Guenter Fleckenstein

Peter Renninger

Wolfgang Bandel

Friedrich Sperling

Gerhard Griebling

Guenther Hohenberg

Klemens Klueppel

In a compressor particularly of an exhaust gas turbocharger of an internal combustion engine having a compressor wheel rotatably supported in a compressor housing which includes a diffuser structure with an adjustable diffuser geometry comprising guide vanes pivotally supported, an adjustment ring is provided with engagement elements which engage forked end structures of the guide vanes at the outer ends of the guide vanes opposite the pivotal guide vane support so that the pivot position of the guide vanes can be adjusted by rotation of the adjustment ring.

Compressor, particularly in an exhaust gas turbocharger for an internal combustion engine

An exhaust gas turbocharger for an internal combustion engine comprises a turbine in the exhaust line and a compressor, which is driven by the turbine and which is located inside the intake tract of the internal combustion engine. The turbine comprises a flow duct having a radial flow entrance cross-section, and a flow ring is provided that delimits the flow entrance cross-section. An adjustable vane is placed in the radial flow entrance cross-section for variably adjusting this flow entrance cross-section. The flow ring inside the housing of the exhaust gas turbine can be axially displaced between a contact position toward the vane and a position that frees a gap toward the vane.

Exhaust gas turbocharger for an internal combustion engine

The invention concerns an exhaust gas turbocharger for an internal combustion engine, with at least one turbine arranged in the exhaust gas stream downstream of the internal combustion engine, wherein the turbine includes at least one flow channel with at least one radial flow cross-section, with a nozzle ring bordering the radial flow cross-section, wherein for the variable adjustment of the radial flow cross-section a variable guide vane is provided in this area.

Turbocharger

An operating internal combustion engine with at least one cylinder ( ), and a piston ( ), which can move in an alternating manner therein, is used to compress a fuel mix in a combustion chamber ( ). In order to determine the nitrogen oxide content in oxygen-containing exhaust gases, the quantity of fuel fed to the cylinder ( ) and the air mass flowing in an induction pipe ( ) are recorded and are fed to an electronic circuit ( ). The center of gravity (S) of the combustion is determined from at least one current measured value for the engine operation, and the level of nitrogen oxide emissions is calculated from the value for the center of gravity (S) of the combustion, including the values for the recorded fuel quantity and air mass.

Method for determining nitrogen oxide content in internal combustion engine exhaust gases containing oxygen

A compressor in a turbocharger has a compressor impeller in an inflow passage and an outflow region downstream of the compressor-impeller outlet edge. The outflow region is assigned a connecting passage, a stabilizing chamber and an outflow passage, the connecting passage being arranged with a lateral offset with respect to a longitudinal center axis of the stabilizing chamber.

Compressor in a turbocharger

In an exhaust-gas turbocharger having a compressor and an exhaust-gas turbine, which drives the compressor and comprises a multipart exhaust gas supply duct manifold and a turbine rotor, to which pressurized exhaust gas can be delivered by way of the exhaust gas supply duct, the exhaust gas supply duct manifold includes at least three flow passages, which, except for one, are provided with shut-off flaps, which are adjustable independently of one another.

Exhaust-gas turbocharger

An exhaust gas turbocharger with a variable turbine geometry can be adjusted in the fired engine operation by an automatic turbine controller to a definable desired supercharging pressure in the intake port. In the braking operation, the turbocharger can be adjusted by an engine braking system with an automatic braking controller as a function of operating parameters of the internal-combustion engine into a ram position which increases the pressure in the exhaust gas system. A change-over element is provided for the change-over between the engine braking system and the automatic turbine controller. To make the exhaust gas turbocharger variable, the automatic turbine controller and the engine braking system each have a modular design and a separate construction. A manual braking signal to the engine braking system, can be generated in a manually adjustable brake operating device. A change-over element is provided for changing over between the automatic braking controller and the brake operating device.

Exhaust gas turbocharger with a variable turbine geometry

The invention relates to a radial compressor for producing a compressed gas flow, having a casing, an impeller which is arranged therein has a hub which carries blades. A ring is arranged in the flow duct concentrically with the hub, and is accommodated in a recess in the inner surface of the casing. The ring has wall slits on its inner surface. An annular gap is provided between that end face of the ring which is directed downstream and an end face of the recess which corresponds thereto and is directed upstream.

Radial compressor with wall slits

An exhaust gas turbine portion of a vehicle engine turbocharger is provided with at least one variable guide-blade cascade with guide blades in a nozzle opening to the turbocharger rotor for effectively changing the cross section of the exhaust flow to the rotor wherein the angle of the guide blades is selectively settable by an adjusting device. The width dimension of the gap between the ends of the guide-blade cascade and the casing wall defining the nozzle is adjustable between a substantially zero gap dimension and a maximum gap dimension.

Exhaust gas turbine of a turbocharger for an internal combustion engine

In a multi-cylinder internal combustion engine including an exhaust gas turbocharger to which at least two separate exhaust lines extend from different groups of cylinders of the engine, the exhaust lines have discharge openings arranged adjacent one another along a control surface area and a control slide member supported so as to be movable relative to the exhaust gas discharge openings includes wall portions movable with the slide member between a position in which the wall portions of the slide member are in alignment with stationary wall portions between the discharge openings for maintaining the exhaust gas flow passages separated from one another and a position in which the wall portions on the slide member are out of alignment with the stationary wall portions, wherein the exhaust gas lines are in communication with one another.

Multi-cylinder internal combustion engine with an exhaust-gas turbocharger

An exhaust gas turbocharger for an internal-combustion engine, whose exhaust gas turbine has a rotor disk with at least one semiaxial and one radial flow inlet cross-section, and is provided with a variable turbine geometry for the variable adjustment of at least one flow inlet cross-section. Furthermore, a compressor is provided in the intake system of the internal-combustion engine. In order to improve the efficiency of the exhaust gas turbocharger in a wide operating range, the ratio of the compressor outlet diameter to the average turbine inlet diameter can be variably adjusted according to the adjustment of the variable turbine geometry between a minimal value and a maximal value, the minimal value being lower than 1.1.

Exhaust gas turbocharger for an internal-combustion engine and method of operating same

In an exhaust gas re-circulation arrangement for a supercharged internal combustion engine including an exhaust gas turbocharger with an exhaust gas turbine and a compressor, first and second exhaust pipes extending from the engine separately to the exhaust gas turbine, a charge air duct extending from the compressor to the engine and an exhaust gas recirculation line extending from one of the exhaust pipes upstream of the exhaust gas turbine to the charge air duct downstream of the compressor, the exhaust gas turbine has two turbine inlet flow passages, which provide for different flow volumes and to each of which one of the exhaust pipes is connected and a control arrangement is provided for controlling the exhaust gas flow through the turbine inlet flow passages so as to control the pressure in the exhaust gas re-circulation line to be higher than in the charge air intake duct.

Exhaust gas re-circulation arrangement

An exhaust turbocharger for an internal combustion engine has a main compressor for compressing the fresh air supplied to the engine, an additional compressor for compressing combustion gases to be recycled to the engine, and a turbine that can be driven by the exhaust gases from the engine and which serves to drive the main compressor and the additional compressor. The turbine has an adjustable geometry which facilitates optimization of engine operation regarding pollutant emissions, fuel consumption, and performance.

Exhaust turbocharger

In a method and apparatus for controlling a supercharged internal combustion engine including an exhaust gas turbocharger having variable turbine inlet vanes, an engine control unit includes an engine performance graph with control parameters for a multitude of engine operating points compressor performance graph is also recorded in the engine performance which represents for various exhaust gas turbocharger speeds a particular relationship between mass flow through the compressor and total pressure ratio. A multitude of engine operating curves for constant turbine guide vane positions and constant engine speeds for various engine loads and engine operating modes are also recorded and retrieved by the engine control unit for controlling the engine depending on desired engine load and engine speed for adjusting the turbine inlet vanes.

Method of controlling a supercharged internal combustion engine and

In the engine braking operation of supercharged internal combustion engines, the braking power is generated by backing-up the exhaust gas before it enters an exhaust gas turbine of an exhaust gas turbocharger from an actuator in the exhaust gas duct. In order to make it possible to control the braking power within the operating limits of the exhaust gas turbocharger, the actual value and a maximum value of the turbine inlet pressure within the operating limits of the exhaust gas turbo supercharger are inferred from a performance graph of the internal combustion engine, which performance graph includes an electronically stored compressor performance graph of the supercharged air compressor which represents the relationship between mass throughput and total pressure ratio of the compressor and in which a plurality of engine operating lines for certain actuator positions and certain engine speeds as well as for a constant turbine inlet pressure are recorded. The maximum value arises as a function of the engine speed from a characteristic rotational speed line stored in the performance graph. Corresponding to the desired braking power, a nominal value which, together with the actual value of the turbine inlet pressure, serves in the control circuit as an inlet parameter for an engine controller for a comparison of nominal and actual values, is determined proportionally from the maximum value.

Growing community of inventors

Schorndorf, Germany

Helmut Daudel