Abstract:
A radial-flow exhaust-gas turbocharger turbine is provided with a row of adjustable guide blades which are rotatable via adjusting shafts mounted in a casing. The guide blades are each provided with sealing discs on their longitudinal sides running at right angles to the adjusting-shaft axes. The diameter of the sealing discs is a multiple of the thickness of the guide blades. The sealing discs which are located on the side remote from the adjusting shafts form bearing points for the guide blades in the casing.
Abstract:
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.
Abstract:
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.
Abstract:
In an exhaust gas turbocharger for an internal combustion engine with a turbine casing including a turbine inlet structure with two flow passages separated by a partition, a turbine control valve is arranged in the partition and is in communication with a turbine bypass flow passage, which is disposed in the partition and extends to the turbine outlet for discharging exhaust gases from at least one of the two turbine inlet flow passages to the turbine outlet under the control of the turbine bypass valve.
Abstract:
In an exhaust gas turbocharger turbine for an internal combustion engine with a turbine housing having an annular flow path, a control sleeve axially movably supported in an annular space formed in the turbine housing adjacent the annular flow path and having at its front end a flow guide structure with vanes for guiding the exhaust gas flow when the flow guide structure is disposed in the annular flow path, a ring is disposed at the front end of the control sleeve in front of the flow guide structure such that the annular space is covered and sealed when the control sleeve is fully retracted into the annular space whereby flow losses are substantially reduced.
Abstract:
In a rear view mirror for a motor vehicle with a housing connected with an air source, traversed by air guide channels, and holding a mirror glass, with the outlets of the channels being arranged along the edge of the mirror glass to allow air to escape opposite to the direction of forward travel of the vehicle, modified guidance and processing of the escaping air reduces the danger of contamination of the mirror glass by the wind blast as well contamination of the side window associated with the mirror. This is also intended to improve the flow resistance of the mirror as well as its noise behavior. For this purpose, a plurality of separate air channel outlets is provided that are located within a guiding device and/or are equipped with one that produces vorticized air streams that emerge and are stable at each of the air outlets.
Abstract:
In a method and system for controlling the flow of fluid through the intake duct of an internal combustion engine of which the exhaust gas is measured and its composition compared with values desired for minimum fuel consumption and minimum emission values and the flow of additional fluid supplied to the intake duct is controlled depending on a characteristic diagram, the mass flow and flow profiles are varied depending on the characteristic diagram by controlled injection of the additional flow into the intake duct and by controlled removal of gas from the intake duct.
Abstract:
The exhaust gas flow of an internal-combustion engine is be supplied to a turbine wheel of a radial turbine through a gas duct arrangement in the turbine housing. A guiding device is controlled as a function of operational parameters of the internal combustion engine, by means of which the exhaust gas current can be rerouted into separate gas ducts of the duct arrangement. In order to achieve an improved behavior in the lower nonsteady speed range, one of the gas ducts opens at a front side of the turbine housing on the side of the turbine wheel shaft in the area of the moving blades of the turbine wheel.
Abstract:
A rotor for a gas turbine exhibits three-dimensionally curved blades which are curved counter to the direction of rotation of the rotor in the radial flow region. The blades are arranged on a hub with a disc-shaped terminal region. In order to achieve a more highly aerodynamic blade shape with a simultaneous reduction of the moment of inertia of the rotor, the blades exhibit in the axial direction mean camber lines which extend centrally in the radial direction between the pressure side and the suction side of the blades, the mean camber lines being describable by a 2nd order curve equation.
Abstract:
In a turbine for an exhaust gas turbocharger having a turbine housing with a turbine rotor rotatable supported therein and including spiral channels for directing exhaust gas onto the turbine wheel, at least one annular blocking element is supported between the spiral channels and the turbine wheel so as to be rotatable in the peripheral direction of the turbine wheel and additionally movable in the axial direction of the turbine wheel for a controlling the exhaust gas flow to the turbine wheel between impulse turbine mode when extended into the space between the turbine wheel and the spiral chamber and an accumulation made when retracted, with the gas flow through the turbine wheel or by-passing the turbine wheel being adjustable by rotation of the blocking element.