DE102021117188A1 - Compressor-turbine arrangement, internal combustion engine and method for operating a compressor-turbine arrangement - Google Patents

Abstract

The invention relates to a compressor-turbine arrangement (1) with a compressor (3) mounted in a compressor housing and a turbine (5) mounted in a turbine housing, the compressor (3) and the turbine (5) being connected via a shaft (7 ) are connected to one another in a rotationally fixed manner, the shaft (7) being rotatably mounted in at least one bearing device (9) of the compressor-turbine arrangement (1), the compressor-turbine arrangement (1) having an oil supply device (11) which connected to the bearing device (9), the oil supply device (11) having at least one oil supply line (13) and a heating device (15), a first end (17) of the oil supply line (13) being connected to the bearing device (9) and a second end (19) of the oil supply line (13) can be connected to an oil reservoir (21), and wherein the heating device (15) is designed and set up to heat an oil conveyed in the oil supply line (13).

Description

The invention relates to a compressor-turbine arrangement, an internal combustion engine and a method for operating a compressor-turbine arrangement.

Compressor turbine assemblies, internal combustion engines and methods for operating such compressor turbine assemblies and internal combustion engines are known. The compressor-turbine arrangement is typically used as an exhaust gas turbocharger in order to use thermal energy of a combustion gas, which is contained in the combustion gas after the combustion process, in order to drive a turbine of the compressor-turbine arrangement in an outflow path of the internal combustion engine. Since the turbine is connected to a compressor of the compressor-turbine arrangement via a shaft, the compressor, which is arranged in an inflow path of the internal combustion engine, is also set in rotation. As a result, a fresh gas guided in the inflow path is compressed and thus a charging pressure is increased, ie in particular an efficiency of the combustion process in a combustion chamber of the internal combustion engine is increased. Since the energy contained in the exhaust gas essentially depends on its temperature and pressure, there is often not enough energy available to drive the turbine in such a way that the overall efficiency is optimal, especially when starting such an internal combustion engine. This leads to heat losses, particularly in the still cold exhaust gas lines and cylinder heads of the internal combustion engine, which reduces the residual energy in the exhaust gas.

In particular, as a result, the friction of the shaft, which is usually arranged in an oil bearing in a bearing housing, is very high, as a result of which further energy losses occur when torque is transmitted from the turbine to the compressor as a result of the friction. The boost pressure of the internal combustion engine, which is thus reduced overall, also lengthens run-up times, ie the starting process of the internal combustion engine as a whole.

In order to reduce these problems, it is known to use oils that are already as thin as possible, particularly at room temperature, as a result of which friction losses can be reduced.

Shafts with ball bearings are also known for connecting compressors and turbines, so that this also reduces friction losses, particularly during the starting process.

Finally, it is also known to downsize the turbine as such, whereby on the one hand an increased drive pressure is generated. On the other hand, however, this reduces the overall efficiency of the internal combustion engine.

The object of the present invention is to create a compressor-turbine arrangement, an internal combustion engine and a method for operating the compressor-turbine arrangement and/or the internal combustion engine, the disadvantages mentioned being avoided. In particular, the object of the invention is to reduce friction-related energy losses during a starting process of the internal combustion engine and/or to shorten the duration of a run-up of the compressor-turbine arrangement and/or the internal combustion engine as a whole, so that the optimum speed range is reached earlier.

The object is achieved by providing the present technical teaching, in particular the teaching of the independent claims and the embodiments disclosed in the dependent claims and the description.

The object is achieved in particular by creating a compressor-turbine arrangement which has a compressor mounted in a compressor housing and a turbine mounted in a turbine housing, the compressor and the turbine being connected to one another in a torque-proof manner via a shaft, the shaft being at least one bearing device of the compressor-turbine arrangement is rotatably mounted, the compressor-turbine arrangement having an oil supply device which is connected to the bearing device, the oil supply device having at least one oil supply line and a heating device, a first end of the oil supply line being connected to the Bearing device connected and a second end of the oil supply line can be connected to an oil reservoir, in particular connected, and wherein the heating device is designed and configured for heating a guided in the oil supply line oil. As a result, the oil that is supplied to the bearing device and is preferably used to lubricate the shaft is preheated and its viscosity is reduced. As a result, less energy is lost through friction when the shaft rotates. Thus, overall, a boost pressure that can be generated by the compressor for an internal combustion engine is increased. In addition, as a result, a setpoint speed of the compressor-turbine arrangements and/or the internal combustion engine is reached more quickly and the run-up time is shortened.

The oil supply device is preferably designed separately from the bearing device forms. In particular, the heating device is designed separately from the bearing device in this case, as a result of which the heating device can be heated independently of the bearing device. The bearing device is preferably connected to the oil supply device solely through the oil supply line, in particular its first end. Because of the separate design, heat exchange between the oil supply direction, in particular the heating device, and the bearing device is reduced. As a result, the oil to be heated can be heated with little energy input. In addition, a more flexible arrangement of the individual components is possible with the separate design. Retrofitting a known, in particular ready-to-use, compressor-turbine arrangement is hereby easily possible by connecting the oil supply line of the oil supply device, which can be heated by the heating device, to a preferably already existing connection area of the known compressor-turbine arrangement.

Alternatively, the oil supply device is formed at least partially, preferably completely, integrally with the bearing device. In particular, the heating device is designed as part of the bearing device. In this case, the storage device preferably has the heating device. The oil supply device and the bearing device are particularly preferably designed together as an integral bearing housing, which provides both the bearing of the shaft and the heating of the oil. As a result, the overall design is very compact. Due to this compact design in particular, diffusive heat losses can also be reduced and heat fluctuations avoided.

The turbine mentioned here, the compressor, the bearing device, which is designed in particular as a bearing housing, the shaft, the turbine housing and the compressor housing are preferably designed together as an exhaust gas turbocharger. In principle, however, the inventive principle explained here can advantageously be transferred to any compressor-turbine arrangement and in particular to other oil-bearing shafts.

The shaft mounted in the bearing device is therefore preferably oil-bearing. An oil bearing is understood here in particular to mean that the shaft in contact with the oil is in particular surrounded by the oil and—at least during rotation of the shaft—floats in this oil in such a way that the shaft is surrounded by the oil at least in sections in all radial directions is. This reduces friction between the shaft and the component that supports the shaft, here the bearing device.

According to a development of the invention, it is provided that the heating device has a heat exchanger and a heat source. Such a heater thus provides an efficient means of heating the oil.

In this case, the heat exchanger is preferably coupled to the oil supply line for exchanging heat, in particular for transferring heat. The heat source is designed and set up for heating, ie for heating, the heat exchanger, in particular coupled to the heat exchanger for the transfer of heat.

According to a development of the invention, it is provided that the heating device, in particular the heat exchanger, encompasses the oil supply line at least in sections. This allows the oil to be heated easily and efficiently.

According to a development of the invention, it is provided that the heat exchanger is designed as a metal block and/or as part of a bearing housing that includes the bearing device. The design as a metal block is particularly cost-effective, with the transfer of heat by means of the metal block being improved, in particular due to its high thermal conductivity. Due to the integral design as part of the bearing housing, the overall design is very compact and space-saving.

A metal block is understood here in particular as an at least essentially unmachined metal block, which is preferably designed and arranged separately from the bearing device.

In principle, materials other than metal and/or designs other than the block-shaped form mentioned are also possible. It is important that the heat exchanger has a high level of thermal conductivity and that there is therefore good heat transfer between the heat exchanger and the oil supply line and in particular the oil carried in it.

According to a development of the invention, it is provided that the heat source has an electric heating element. As a result, the heating device and the heat source can function, in particular, independently of an operation of the internal combustion engine and/or a rotation of the shaft. In addition, as a result, the heating device and/or the heat source can already be put into operation before the internal combustion engine has been started and/or the shaft has been set in rotation.

The heat source is preferably designed as an electric heating cartridge, as a result of which the oil is heated particularly efficiently, which is independent of the operation of the internal combustion engine and/or the rotation of the shaft.

According to a development of the invention, it is provided that the heat exchanger, in particular the metal block, preferably predominantly has steel, copper, aluminum, iron, in particular cast iron, and/or alloys of these materials, in particular consists of them. As a result, the thermal conductivity of the heat exchanger is high and the heating of the oil is very efficient, which reduces energy losses during heating.

The material of the heat exchanger is therefore preferably chosen in such a way that the thermal conductivity is high.

According to a development of the invention, it is provided that the metal block has a weight of at least 2 kg. As a result, the thermal capacity of the metal block is very high and a quantity of heat supplied via the heat source can be temporarily stored very well on the one hand and distributed over a larger area on the other hand and transferred to the oil supply line.

The metal block preferably has a weight of at least 3 kg, preferably 4 kg, preferably 5 kg. The metal block preferably weighs between 2 kg and 5 kg. This further increases the heat capacity. In addition, this also further improves the transfer of heat from the heat source to the oil supply line and in particular to the oil conveyed therein.

It is important that the dimensioning, in particular the size and/or weight and thus the heat capacity of the metal block, is selected in such a way that the oil heated by the metal block, in particular in a starting phase of the internal combustion engine, especially in the first 20 to 60 seconds after starting of the internal combustion engine, after heating to at least 60°C, preferably at least 80°C, preferably at least 100°C.

According to a development of the invention, it is provided that the heat exchanger has at least one water reservoir and/or at least one water line. This makes it possible to use the heat exchanger as a water-carrying heat exchanger, so that the thermal capacity of the heat exchanger is high and heat transfer to the oil is very efficient. Due to the high heat capacity, residual heat from the internal combustion engine and/or the compressor-turbine arrangement from previous operation, which is before the starting process, can also be stored and used to heat the oil.

According to a development of the invention, it is provided that the compressor-turbine arrangement has an oil reservoir which is connected to the second end of the oil supply line. This creates an overall compact compressor-turbine arrangement that can be used independently of an external, separately designed oil reservoir.

The object is also achieved in particular by creating an internal combustion engine with a compressor-turbine arrangement according to one of the preceding exemplary embodiments, the compressor being arranged in an inflow path to a combustion chamber of the internal combustion engine and the turbine being arranged in an outflow path from a combustion chamber of the internal combustion engine. As a result, the internal combustion engine can be operated efficiently, in particular during a run-up, ie a starting process of the internal combustion engine, with a boost pressure being very particularly high during run-up.

An inflow path is understood here in particular as a supply line for fresh gas, which is designed and set up to supply the fresh gas to the combustion chamber of the internal combustion engine for combustion with a fuel. An outflow path is understood here in particular to mean an exhaust gas line which is designed and set up to discharge exhaust gas resulting from the combustion from the combustion chamber.

The object is also achieved in particular by creating a method for operating a compressor-turbine arrangement in particular according to one of the preceding exemplary embodiments and very particularly for operating an internal combustion engine according to one of the preceding exemplary embodiments, with a bearing device of the compressor-turbine arrangement containing an oil is supplied, the oil being heated before and/or during the supply by a heating device of the compressor-turbine arrangement. As a result, friction-related energy losses when operating the compressor-turbine arrangement are low.

The oil is preferably heated in an oil supply line of the compressor-turbine arrangement, so that the oil supplied is already heated in the bearing device. This ensures a reliable supply of heated oil and friction-related energy losses are particularly low.

A compressor of the compressor-turbine arrangement is preferably arranged in an inflow path of the internal combustion engine and is designed and set up to compress a fresh gas that is guided in the inflow path. A turbine of the compressor-turbine arrangement that is arranged in an outflow path of the internal combustion engine is preferably designed and set up here to expand an exhaust gas that is guided in the outflow path and thus to extract energy from it. The turbine and compressor and in particular the compressor-turbine arrangement are therefore particularly preferably designed as an exhaust gas turbocharger, which is set up to compress the fresh gas supplied to the internal combustion engine.

According to a development of the invention, it is provided that the oil is supplied to a shaft connecting the turbine to the compressor. As a result, friction of the shaft, in particular between the shaft and the bearing device, is reduced

The heated oil is therefore preferably used to support the shaft, thereby reducing friction.

According to a development of the invention, it is provided that the oil is heated and/or supplied before starting an internal combustion engine that is operatively connected to the compressor-turbine arrangement and/or during a run-up of the internal combustion engine. As a result, energy losses during startup are reduced and the duration of the startup is shortened.

A run-up is understood here in particular as a process when starting the compressor-turbine arrangement, in particular the internal combustion engine, with a speed of the compressor-turbine arrangement, in particular the shaft, and/or a further speed of a further component of the internal combustion engine, in particular an engine speed, increases over time, particularly to reach a target speed.

According to a development of the invention, it is provided that the oil is heated to at least a temperature of 60°C, preferably 80°C, preferably 100°C. As a result, friction and the associated friction-related energy losses are particularly low.

The temperature is preferably selected in such a way that the viscosity of the oil is only 1/10, preferably 1/15, preferably 1/18, preferably 1/20 of the original viscosity of the oil. An original viscosity is understood here in particular to mean the viscosity of the oil before heating and very particularly to mean the viscosity of the oil at room temperature. As a result, the friction is particularly low.

According to a development of the invention, provision is made for another oil to be heated, with the heated additional oil being supplied to the internal combustion engine. This enables two different oils to be heated separately, in particular to two different temperatures, so that one oil and its properties can be selected in such a way that they are optimal for the operation of the compressor-turbine arrangement, in particular the shaft, with the other, more oil can be selected such that its properties are optimal for the operation of the internal combustion engine.

It is preferably provided that the additional oil is not supplied to the compressor-turbine arrangement.

The oil supplied to the compressor-turbine arrangement is preferably supplied separately from the other oil, which is in particular engine oil.

The internal combustion engine is preferably designed as a reciprocating piston engine. It is possible for the internal combustion engine to be set up to drive a passenger car, a truck or a commercial vehicle. In a preferred exemplary embodiment, the internal combustion engine is used to drive heavy land or water vehicles in particular, for example mining vehicles, trains, with the internal combustion engine being used in a locomotive or a railcar, or ships. It is also possible to use the internal combustion engine to drive a vehicle used for defense, for example a tank. An exemplary embodiment of the internal combustion engine is preferably also used in a stationary manner, for example for stationary energy supply in emergency power operation, continuous load operation or peak load operation, with the internal combustion engine preferably driving a generator in this case. A stationary use of the internal combustion engine for driving auxiliary units, for example fire pumps on oil platforms, is also possible. Furthermore, the internal combustion engine can be used in the field of extracting fossil raw materials and in particular fuels, for example oil and/or gas. It is also possible to use the internal combustion engine in the industrial sector or in the construction sector, for example in a construction or construction machine, for example in a crane or an excavator. The internal combustion engine is preferably designed as a diesel engine, as a gasoline engine, as a gas engine for operation with natural gas, biogas, special gas or another suitable gas forms. In particular, when the internal combustion engine is designed as a gas engine, it is suitable for use in a block-type thermal power station for stationary power generation.

The descriptions of the method, the compressor-turbine arrangement and the internal combustion engine are to be understood as complementary to one another. In particular, features of the internal combustion engine and/or the compressor-turbine arrangement that have been described explicitly or implicitly in connection with the method are preferably individually or combined features of the internal combustion engine and/or the compressor-turbine arrangement. The internal combustion engine and/or the compressor-turbine arrangement is/are preferably designed to carry out at least one of the method steps described in connection with the method. Method steps that have been described explicitly or implicitly in connection with the internal combustion engine and/or the compressor-turbine arrangement are preferably individually or in combination with one another steps of a preferred embodiment of the method. In particular, as part of the method, at least one step is preferably provided which results from at least one feature of the internal combustion engine and/or the compressor-turbine arrangement.

• 1 zeigt eine Verdichter-Turbinen-Anordnung 1 mit einem Verdichter 3 und eine Turbine 5, wobei der Verdichter 3 und die Turbine 5 über eine Welle 7 miteinander drehfest verbunden sind. Die Welle 7 ist dabei in einer Lagervorrichtung 9, welche hier als Lagergehäuse ausgebildet ist, um eine Rotationsachse A drehbar gelagert.

The invention is explained in more detail below with reference to the drawing. The only figure shows a schematic representation of a compressor-turbine arrangement and an internal combustion engine.

• 1 shows a compressor-turbine arrangement 1 with a compressor 3 and a turbine 5, the compressor 3 and the turbine 5 being connected to one another in a torque-proof manner via a shaft 7. The shaft 7 is rotatably mounted about an axis of rotation A in a bearing device 9, which is designed here as a bearing housing.

Furthermore, the compressor-turbine arrangement 1 has an oil supply device 11 which is connected to the bearing device 9 by means of an oil supply line 13 . The oil supply device 11 thus has the oil supply line 13 and also a heating device 15 . A first end 17 of the oil supply line 13 is connected to the bearing device 9 here, with a second end 19 of the oil supply line 13 being able to be connected to an oil reservoir 21 and being connected here in particular. In this case, the heating device 15 is designed and set up for heating an oil carried in the oil supply line 13 . As a result, oil fed to the shaft can be heated in advance and in particular before the shaft and/or an exhaust line of an internal combustion engine has reached an operating temperature. This reduces in particular shaft friction and associated energy losses, increases boost pressure that can be generated by means of the compressor-turbine arrangement 1 and shortens the duration of a run-up of the compressor-turbine arrangement 1 .

The oil supplied to the bearing device 9 means that the shaft 7 is oil-bearing here, in particular in the bearing device 9, with at least one, here in particular two, bearing areas 16 encompassing the shaft 7 in the circumferential direction being designed in particular as recesses in the bearing device 9, with the bearing areas 16 being connected to the heated oil.

In addition, a line that drains the oil is preferably provided, which collects the oil from the bearing area and/or oil leaks and drains it out of the compressor-turbine assembly 1 and/or feeds it back to the oil supply line 13, particularly in a section that is fluidically above the Heating device 15 is arranged. Thus, an oil circuit is created overall and the need for oil is low.

In the exemplary embodiment of the compressor-turbine arrangement 1 shown here, the heating device 15 has a heat exchanger 23 and a heat source 25 . The heat exchanger 23 is designed here in particular as a metal block 27, so that the heat capacity and the thermal conductivity are high and heat transfer to the oil therefore takes place very efficiently. This metal block 27 encloses a section of the oil supply line 13, in particular in that the oil supply line 13 is led through recesses in the metal block 27. As a result, the heat transfer is very efficient on the one hand and the production costs are low on the other.

In the exemplary embodiment shown here, the heat source 25 is in the form of an electrical heating cartridge 29 which is supplied with electrical energy via an electrical voltage supply 31 .

The heat exchanger shown here, that is to say the metal block 27, is preferably predominantly made of steel, copper, aluminum, iron, in particular cast iron, and/or alloys of these materials. The metal block 27 particularly preferably consists of such a material, in particular aluminum and/or copper, which are particularly advantageous here with regard to their relevant properties mentioned here, in particular thermal conductivity and heat capacity.

Furthermore, the metal block 27 preferably has a weight of at least 2 kg, preferably a weight between 2 and 5 kg. As a result, the heat capacity on the one hand and the thermal conductivity on the other hand are high and the oil is heated quickly and evenly. The weight and thus the thermal capacity is selected in such a way that during a starting process, in particular in the first 20 to 60 seconds after starting an internal combustion engine, the oil, after it has been heated, in particular after flowing through the metal block, is brought to the desired temperature, in particular at least 60°C , preferably at least 80°C, preferably at least 100°C.

In an alternative embodiment not shown here, the heat exchanger 23 is designed as a water-carrying heat exchanger, the heat exchanger 23 having at least one water reservoir and/or at least one water line. This also improves the heating of the oil and the operation of the compressor-turbine arrangement is efficient.

Furthermore shows 1 an internal combustion engine 33 which includes the compressor-turbine arrangement 1 . The compressor 3 is arranged in an inflow path, not shown here, to a combustion chamber of the internal combustion engine 33 and the turbine 5 is arranged in an outflow path from a combustion chamber of the internal combustion engine 33 . As a result, the operation of the internal combustion engine is very efficient, especially during a starting process, i.e. a run-up of the internal combustion engine, with boost pressure being high and energy losses due to friction, particularly in the area of shaft 7, being low.

Based on 1 a method for operating a compressor-turbine arrangement 1, in particular the previously described exemplary embodiment of the compressor-turbine arrangement 1 and/or the internal combustion engine 33, is described below. In this case, the bearing device 9 of the compressor-turbine arrangement 1 is supplied with an oil. The oil is heated by the heating device 15 of the compressor-turbine arrangement 1 before and/or during the supply. This reduces friction between the shaft 7 and the bearing device 9 and thus avoids energy losses caused by friction.

The oil is thus fed here in particular to the shaft 7, which connects the turbine 5 to the compressor 3, with the two bearing areas 16 encompassing the shaft being filled with the oil. Because the oil is heated during filling, the friction between the shaft 7 and the bearing device 9 is always low.

The oil is preferably heated before the internal combustion engine 33 is started and/or during the run-up of the internal combustion engine 33 and supplied to the two bearing areas 16 . Thus, the energy loss is also minimized during the run-up.

In the method presented here, the oil is preferably heated to a temperature of at least 60 °C, preferably 80 °C, preferably 100 °C. This shows that the viscosity of the heated oil reaches a good value and friction is reduced.

According to a particularly preferred embodiment of the method, another oil is also heated and supplied to internal combustion engine 33, in particular to another shaft of internal combustion engine 33 and/or to a cylinder piston of internal combustion engine 33 (not shown here).

This creates a separate oil supply for the shaft 7 of the compressor-turbine arrangement 1 on the one hand and other components of the internal combustion engine 33 on the other hand, so that the respective oil supply is optimized for the respective application.

Particularly preferably, after the compressor-turbine arrangement 1 and/or the internal combustion engine 33 has started up, the heating device 15 is switched off and/or its heating output is reduced, so that the oil - after the internal combustion engine 33 and/or the compressor-turbine arrangement 1 has started up is - is less strong and/or no longer warmed up. This saves energy that is required to operate the heating device 15, so that the method is more efficient overall. In addition, heating by means of the heating device 15 is not necessary after the start-up insofar as the oil is heated by the heated components of the compressor-turbine arrangement 1 and/or the internal combustion engine 33 and additional heating is therefore not required and/or can be reduced , without significantly increasing energy losses due to friction.

Claims (15)

Compressor-turbine arrangement (1) with a compressor (3) mounted in a compressor housing and a turbine (5) mounted in a turbine housing, the compressor (3) and the turbine (5) being non-rotatably connected to one another via a shaft (7). are, wherein the shaft (7) is rotatably mounted in at least one bearing device (9) of the compressor-turbine arrangement (1), the compressor-turbine arrangement (1) having an oil supply device device (11) which is connected to the bearing device (9), the oil supply device (11) having at least one oil supply line (13) and a heating device (15), a first end (17) of the oil supply line (13) being connected to the Bearing device (9) is connected and a second end (19) of the oil supply line (13) can be connected to an oil reservoir (21), and the heating device (15) is designed and set up to heat oil carried in the oil supply line (13). Compressor-turbine arrangement (1) according to one of the preceding claims, characterized in that the heating device (15) has a heat exchanger (23) and a heat source (25). Compressor turbine arrangement (1) according to one of the preceding claims, characterized in that the heating device (15) surrounds the oil supply line (13) at least in sections. Compressor-turbine arrangement (1) according to one of the preceding claims, characterized in that the heat exchanger (23) is designed as a metal block (27) and/or as part of a bearing housing which includes the bearing device (9). Compressor-turbine arrangement (1) according to one of the preceding claims, characterized in that the heat source (25) has an electric heating element. Compressor-turbine arrangement (1) according to one of the preceding claims, characterized in that the heat exchanger (23) has steel, copper, aluminium, iron, in particular cast iron, and/or alloys of these materials. Compressor-turbine arrangement (1) according to one of the preceding claims, characterized in that the metal block (27) has a weight of at least 2 kg. Compressor-turbine arrangement (1) according to one of the preceding claims, characterized in that the heat exchanger (23) has at least one water reservoir and/or at least one water line. Compressor-turbine arrangement (1) according to one of the preceding claims, characterized in that the compressor-turbine arrangement (1) has an oil reservoir (21) which is connected to the second end (19) of the oil supply line (13). Internal combustion engine (33) with a compressor-turbine arrangement (1) according to one of the preceding claims, wherein the compressor (3) in an inflow path to a combustion chamber of the internal combustion engine (33) and the turbine (5) in an outflow path from the combustion chamber of the Internal combustion engine (33) is arranged. Method for operating a compressor-turbine arrangement (1), in particular according to one of Claims 1 until 9 , especially for operating an internal combustion engine (33). claim 10 wherein an oil is supplied to a bearing device (9) of the compressor-turbine arrangement (1), the oil being heated before and/or during the supply by a heating device (15) of the compressor-turbine arrangement (1). procedure after claim 11 , characterized in that the oil is supplied to a shaft (7) connecting the turbine (5) to the compressor (3). Procedure according to one of Claims 11 until 12 , characterized in that the oil is heated and/or supplied prior to starting an internal combustion engine (33) operatively connected to the compressor-turbine arrangement (1) and/or during run-up of the internal combustion engine (33). Procedure according to one of Claims 11 until 13 , characterized in that the oil is heated to a temperature of at least 60 °C. Procedure according to one of Claims 11 until 14 , characterized in that a further oil is heated, wherein the heated further oil of the internal combustion engine (33) is supplied.

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