Internal combustion engine device

Abstract

The present disclosure relates to an internal combustion engine arrangement comprising: an internal combustion engine; a turbine device including a turbine and a compressor, where the turbine includes a flow control member; a motor operably coupled to the turbine device; and a control unit comprising processing circuitry configured to determine a current operating parameter of the turbine, determine a current operating parameter of exhaust gas exhausted from the internal combustion engine, and determine a current operating condition of the turbine, and in response to the current operating condition forming part of the predetermined subset of operating conditions: controlling the electric machine to adjust a rotational speed of the turbine device, and concurrently controlling the flow control member to adjust a throughput capacity of the turbine.

Description

Technical Field

[0001] The present disclosure generally relates to apparatus and methods for avoiding high cycle fatigue. In a particular aspect, the present invention relates to an internal combustion engine apparatus configured to avoid turbine high cycle fatigue. The present disclosure may be applicable to heavy vehicles such as trucks, buses, and construction equipment, among other vehicle types. Although the present disclosure may be described with respect to a particular vehicle, the present disclosure is not limited to any particular vehicle. Background Art

[0002] Internal combustion engines are traditionally used to propel vehicles. Conventional internal combustion engines use gasoline or diesel as fuel. In addition, it is also common practice to use a turbine device in conjunction with an internal combustion engine.

[0003] During operation, for example during engine braking, the turbine of the turbine arrangement can be used to control the back pressure. However, one problem with this operating scenario is that the turbine may be subjected to high cycle fatigue loads when aiming to achieve high engine braking powers. The turbine may also be subjected to such high cycle fatigue loads in other operating conditions and there is therefore a need to reduce the risk of the turbine experiencing such high cycle fatigue. Summary of the invention

[0004] According to a first aspect of the present disclosure, an internal combustion engine device is provided, comprising: an internal combustion engine; a turbine device, the turbine device comprising a turbine arranged to be fluidically connected to an exhaust manifold of the internal combustion engine in downstream, and a compressor mechanically connected to the turbine, the compressor being arranged to be fluidically connected to an inlet manifold of the internal combustion engine in upstream, wherein the turbine comprises a flow control member, the flow control member being configured to controllably adjust a throughput capacity of the turbine; an electric motor, the electric motor being operably connected to the turbine device to control a rotational speed of the turbine device; and a control unit, the control unit comprising a processing circuit connected to the electric motor and the flow control member, the processing circuit being configured to determine a current operating parameter of the turbine, determine a current operating parameter of exhaust gas discharged from the internal combustion engine, and determine a current operating condition of a total number of operating conditions of the turbine based on at least one of the current operating parameter of the turbine and the current operating parameter of the exhaust gas, and control the electric motor to adjust the rotational speed of the turbine device in response to the current operating condition forming a part of a predetermined subset of operating conditions of the total number of operating conditions, and simultaneously control the flow control member to adjust the throughput capacity of the turbine.

[0005] A first aspect of the present disclosure may seek to mitigate turbine damage caused by high cycle fatigue. Technical benefits may include: a motor coupled to a turbine arrangement and a flow control member may be controlled to avoid the turbine arrangement operating under adverse operating conditions. Thus, the operating life of the turbine may be extended. Furthermore, by controlling the motor and the flow control member simultaneously, the operating condition of the turbine may be changed so that it does not form part of a predetermined subset of operating conditions. Furthermore, due to the simultaneous control of the motor and the flow control member, the internal combustion engine may be operated as desired despite the change in the operating condition of the turbine.

[0006] The definition of "current operating parameters of the turbine" is to be interpreted below and throughout the text as structural parameters of the turbine. According to a non-limiting example, the current operating parameters of the turbine may include the current position of a flow control member. The position of the flow control member may control the flow supplied through the turbine, i.e., the position may adjust the flow directed through the turbine. According to a further non-limiting example, the current operating parameters of the turbine may include the rotational speed of the turbine arrangement. Therefore, the current operating parameters of the turbine may be used as parameters for determining the current operating conditions of the turbine.

[0007] Furthermore, the definition of "current operating parameters of the exhaust" should be interpreted hereinafter and throughout the text as parameters of the exhaust, i.e., not structural parameters. According to a non-limiting example, the current operating parameters of the exhaust may include the pressure level upstream of the turbine. Thus, the pressure level of the exhaust may affect the turbine and may therefore form part of the current operating conditions of the turbine. According to another non-limiting example, the current operating parameters of the exhaust may include the expansion ratio of the exhaust in the turbine. The turbine expands the exhaust passing through it and may affect the turbine and may therefore form part of the current operating parameters of the turbine. According to yet another non-limiting example, the current operating parameters of the exhaust may include the exhaust flow rate of the exhaust supplied to the turbine from the exhaust manifold. Thus, the flow of the exhaust may affect the turbine and may therefore form part of the current operating parameters of the turbine. The turbine should not be interpreted only as a turbine housing and turbine blades arranged inside such a housing. The turbine may, for example, include a wastegate or the like arranged inside or outside the turbine housing.

[0008] Furthermore, and as is evident from the above description, the current operating condition of the turbine is to be understood as a current condition of the turbine caused by at least one of the current operating parameters of the turbine and the current operating parameters of the exhaust. For example, for specific operating parameters of the turbine or the exhaust, the turbine may be operated in a certain operating condition. Thus, the total number of operating conditions may be viewed as a total number of different available operating conditions in which the turbine may be operated, wherein a predetermined subset of operating conditions may be interpreted as unfavorable, i.e., the turbine may be negatively affected when operating in the operating conditions forming part of the predetermined subset of operating conditions.

[0009] Furthermore, the throughput capacity of a turbine should be interpreted as the volume flow or volume flow rate that the turbine is able to receive and discharge. Therefore, and as defined above, the flow control member can adjust this volume or volume flow rate.

[0010] In some examples, including at least one preferred example, optionally, the electric machine may be controlled to adjust the speed of the turbine device in response to the current operating condition forming part of the predetermined operating condition subset so that subsequent operating conditions of the turbine exceed the predetermined operating condition subset.

[0011] Technical benefits may include: performing rapid control so that the turbine operating conditions exceed a predetermined subset of operating conditions. In other words, the turbine is not operated under adverse operating conditions, for example, such adverse operating conditions may cause high cycle fatigue damage to components of the turbine.

[0012] Optionally, in some examples, including in at least one preferred example, the processing circuit can also be configured to determine a desired output torque of a crankshaft of the internal combustion engine, and control the motor and flow control member so that the resulting output torque of the crankshaft is within a predetermined range of the desired output torque.

[0013] Technical benefits may include: when the motor and flow control member are controlled simultaneously, the output torque of the crankshaft may remain substantially the same as before the motor and flow control member are controlled. In addition, or as an alternative, the fuel supply to the internal combustion engine may be controlled substantially the same before and after the motor and flow control member are controlled. Therefore, the internal combustion engine device may maintain substantially the same operating conditions before and after the motor and flow control member are controlled as described above.

[0014] Therefore, the resulting output torque is preferably the torque of the crankshaft after simultaneously controlling the motor and the flow control member. The control unit may receive a signal indicative of the resulting output torque, and if the resulting output torque exceeds a predetermined range, the motor and / or the flow control member may be controlled to adjust the resulting output torque. The processing circuit may alternatively or additionally determine the pressure level of the combustion gases in the exhaust manifold, and control the motor and the flow control member so that the resulting pressure level of the combustion gases in the exhaust manifold is within a predetermined range of the desired output torque.

[0015] Optionally, in some examples, including at least one preferred example, the flow control member may be positioned upstream of turbine blades of the turbine.

[0016] Technical benefits may include that the throughput capacity of the turbine may be effectively controlled because adjustments to the exhaust gas fed into the turbine may be controlled before the exhaust gas enters the inlet of the turbine.

[0017] Optionally, in some examples, including at least one preferred example, the turbine may be a variable geometry turbine.

[0018] Technical benefits may include: The throughput capacity of such a variable geometry turbine can be adjusted quickly and efficiently.

[0019] Optionally, in some examples, including at least one preferred example, the flow control member may be one of a pivoting nozzle vane, an adjustable vane disposed at the turbine inlet, or a flow control valve disposed at the turbine inlet.

[0020] Optionally, in some examples, including in at least one preferred example, the predetermined subset of operating conditions may be formed by a predetermined set of predetermined threshold limits.

[0021] Technical benefits may include knowing in advance whether a predetermined threshold limit will negatively impact the turbine and may result in, for example, high cycle fatigue damage to turbine components.

[0022] Optionally, in some examples, including at least one preferred example, the internal combustion engine arrangement may further comprise a first pressure sensor arranged to detect a pressure level upstream of the turbine.

[0023] Optionally, in some examples, including at least one preferred example, the internal combustion engine arrangement may further comprise a second pressure sensor arranged to detect a pressure level of the exhaust gas downstream of the turbine.

[0024] Technical benefits of using first and second pressure sensors may include that rapid adjustments, ie, controlling the motor and flow control member to avoid a predetermined subset of operating conditions, may be performed quickly in response to data received from the first pressure sensor and / or the second pressure sensor.

[0025] Each of the first pressure sensor and the second pressure sensor may also be formed by a so-called virtual sensor. A virtual sensor should be interpreted as a module of a computer system that contains pressure level data for a plurality of operating conditions of the internal combustion engine arrangement. In other words, the module of the computer system may know in advance the pressure level upstream / downstream of the turbine of the internal combustion engine arrangement under a plurality of different operating conditions. The data obtained by the module of the computer system may be received from tests, simulations, live truck data, etc.

[0026] Optionally, in some examples, including in at least one preferred example, the internal combustion engine can be configured to perform engine braking operation, and the processing circuit is further configured to receive a signal indicating the engine braking operation of the internal combustion engine, and when the internal combustion engine performs the engine braking operation, control the motor and the flow control component in response to the current operating condition forming part of a predetermined operating condition subset.

[0027] During an engine braking operation, i.e. during engine braking, the turbine may be subjected to an expansion ratio of the turbine or an inlet pressure of the turbine, which may negatively affect components of the turbine. In other words, during engine braking, the risk that the current operating conditions of the turbine form part of a predetermined subset of operating conditions may increase, and a technical benefit may be that the engine braking operation may be performed with a reduced risk of high cycle fatigue of components of the turbine.

[0028] Optionally, in some examples, including at least one preferred example, the internal combustion engine device may also include an engine aftertreatment system arranged to be fluidically connected to the turbine downstream, and the processing circuit is further configured to receive a signal indicating a temperature adjustment mode of the engine aftertreatment system, and when the engine aftertreatment system adopts the temperature adjustment mode, control the motor and the flow control component in response to the current operating condition forming part of a predetermined operating condition subset.

[0029] Optionally, in some examples, including at least one preferred example, the temperature adjustment mode may be a heating mode in which the temperature level of the engine aftertreatment system is increased above a predetermined threshold temperature level. The predetermined threshold temperature level should be interpreted as also including a temperature threshold rate, i.e., a temperature increase per unit time.

[0030] Therefore, the temperature adjustment mode may also be referred to as a heating mode. In this operating mode, i.e. when it is desired to increase the temperature of the engine aftertreatment system, the turbine is typically controlled to generate back pressure. The back pressure will increase the exhaust gas temperature supplied to the engine aftertreatment system, but may also have a negative impact on the components of the turbine, i.e. subjecting these components to high cycle fatigue damage. Therefore, the technical benefits may include that the internal combustion engine can perform a temperature adjustment mode with a reduced risk of high cycle fatigue of the components of the turbine.

[0031] According to a second aspect of the present disclosure, there is provided a vehicle comprising an internal combustion engine arrangement of any one of the examples described above in relation to the first aspect.

[0032] The effects and features of the second aspect are largely similar to those described above in relation to the first aspect.

[0033] According to a third aspect of the present invention, a method for controlling an internal combustion engine device is provided, wherein the internal combustion engine device includes an internal combustion engine and a turbine device, the method comprising: determining current operating parameters of a turbine of the turbine device through a processing circuit, the turbine being arranged to be fluidically connected to an exhaust manifold of the internal combustion engine in a downstream manner; determining current operating parameters of exhaust gas discharged from the internal combustion engine through the processing circuit; based on the current operating parameters of the turbine and at least one of the current operating parameters of the exhaust, determining a current operating condition from a total number of operating conditions of the turbine through the processing circuit, and forming a part of a predetermined subset of operating conditions from the total number of operating conditions in response to the current operating condition: controlling a motor connected to the turbine through the processing circuit to adjust the rotational speed of the turbine device, and simultaneously controlling a flow control component of the turbine through the processing circuit to adjust the throughput capacity of the turbine.

[0034] The effects and features of the third aspect are largely similar to those described above with respect to the first aspect.

[0035] According to a fourth aspect, there is provided a computer program product comprising program code for performing the method of the third aspect when executed by a processing circuit.

[0036] According to a fifth aspect, there is provided a non-transitory computer-readable storage medium comprising instructions which, when executed by the processing circuit, cause the processing circuit to perform the method of the third aspect.

[0037] Effects and features of the fourth and fifth aspects are largely similar to those described above with respect to the first aspect.

[0038] The disclosed aspects, examples (including any preferred examples), and / or the appended claims may be appropriately combined with each other, which is obvious to any person skilled in the art. Additional features and advantages are disclosed in the detailed description, claims, and drawings, and in part will be obvious to those skilled in the art or recognized by practicing the disclosure as described herein.

[0039] Also disclosed herein are computer systems, control units, code modules, computer-implemented methods, computer-readable media, and computer program products associated with the technical benefits discussed above. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Examples are described in more detail below with reference to the accompanying drawings.

[0041] Figure 1 is an exemplary illustration of a vehicle in the form of a truck according to an example,

[0042] Figure 2is an exemplary illustration of an internal combustion engine arrangement according to an example,

[0043] FIG. 3A to FIG. 5B is an exemplary illustration of a flow control component of a turbine according to an example,

[0044] Figure 6 is an exemplary illustration of the operating conditions of a turbine according to an example,

[0045] Figure 7 is an exemplary illustration of a flow chart for controlling an internal combustion engine according to an example, and

[0046] Figure 8 is a schematic diagram of an exemplary computer system for implementing the examples disclosed herein, according to an example. DETAILED DESCRIPTION

[0047] The detailed description set forth below provides information and examples of the disclosed technology in sufficient detail to enable those skilled in the art to practice the disclosure.

[0048] The disclosure described below may seek to mitigate turbine damage caused by high cycle fatigue. Technical benefits may include: the motor and flow control components coupled to the turbine device may be controlled to avoid the turbine device operating under adverse operating conditions. Thus, the operating life of the turbine may be extended.

[0049] refer to Figure 1 , which is an exemplary illustration of a vehicle 1 according to an example. Figure 1 The vehicle 1 in the embodiment is illustrated as a truck, but the following description may be provided in other vehicles such as, for example, a work machine, a bus, a car, etc. The vehicle 1 includes an internal combustion engine device 100. The internal combustion engine device 100 includes an internal combustion engine 10, which is configured to receive gas for combustion in its combustion chamber. The internal combustion engine may be an internal combustion engine, a gasoline internal combustion engine, a diesel internal combustion engine, etc. In addition, the internal combustion engine device 100 also includes a control unit 140. The control unit 140 includes a processor device configured to control the internal combustion engine device 100, as will be described in further detail below.

[0050] For a more detailed description of the internal combustion engine arrangement 100, refer to Figure 2 .like Figure 2 As shown and described above, the internal combustion engine arrangement 100 includes an internal combustion engine 10. The internal combustion engine 10 includes a plurality of combustion cylinders 200. Figure 2In the embodiment, the internal combustion engine 10 is illustrated as including six combustion cylinders 200, but the present disclosure is applicable to a different number of combustion cylinders 200. Each combustion cylinder 200 is associated with an intake valve 202 and an exhaust valve 204. Therefore, the internal combustion engine 10 includes a plurality of intake valves 202 and a plurality of exhaust valves 204, wherein Figure 2 The intake valve 202 and the exhaust valve 204 are schematically shown to simplify the understanding of those skilled in the art. Figure 2 In the embodiment of the present invention, each combustion cylinder 200 is associated with one intake valve 202 and one exhaust valve 204. However, it should be readily understood that each combustion cylinder 200 may also be associated with more than one intake valve 202 and more than one exhaust valve 204.

[0051] Furthermore, the internal combustion engine 10 includes an intake manifold 206 where air is received and further supplied into the combustion cylinder 200 via the intake valve 202. Furthermore, the internal combustion engine 10 includes an exhaust manifold 208 configured to receive combustion gases exhausted from the combustion cylinder 200 via the exhaust valve 204.

[0052] Furthermore, the internal combustion engine arrangement 100 comprises a turbine arrangement 210. The turbine arrangement 210 comprises a turbine 212 which is arranged in downstream fluid communication with the exhaust manifold 208 of the internal combustion engine 10. Thus, during operation, the turbine 212 receives and expands the combustion gases exhausted from the combustion cylinders 200 of the internal combustion engine 10. The turbine 212 is also arranged in upstream fluid communication with the exhaust outlet 220. Thus, the expanded combustion gases from the turbine are exhausted towards the exhaust outlet 220. Figure 2 In the example depicted in , the internal combustion engine arrangement 100 further comprises an engine aftertreatment system 230 which is arranged in fluid communication between the turbine 212 and the exhaust gas outlet 220 .

[0053] The turbine arrangement 210 further comprises a compressor 214. The compressor 214 is mechanically connected to the turbine 212 and is configured to pressurize ambient air. Preferably, the compressor 214 is connected to the turbine 212 via a turbine shaft 215. The pressurized ambient air is supplied to the intake manifold 206. Therefore, the compressor 214 is arranged in fluid communication with the intake manifold 206 upstream.

[0054] Furthermore, the internal combustion engine device 100 further comprises an electric motor 216 operatively coupled to the turbine device 210. The electric motor 216 is configured to control the rotation speed of the turbine device 210. Figure 2 As shown, the motor 216 is connected between the turbine 212 and the compressor 214. In detail, Figure 2The example depicted in FIG. 2 shows the motor 216 connected to the turbine shaft 215 . However, it should be readily understood that the motor 216 itself may form the turbine shaft. In the latter example, the turbine 212 and the compressor 214 are mechanically coupled to each other via the motor 216 .

[0055] During operation, the speed of the turbine device 210 can be controlled by the exhaust flow of combustion gases from the combustion cylinder 200 and by controlling the speed of the electric machine 216. Thus, the electric machine 216 can increase the speed of the turbine device 210 and / or decrease the speed of the turbine device 210. Thus, the electric machine 216 can operate both as an electric motor and as a generator. Figure 2 Not depicted, but vehicle 1 may include a battery configured to supply power to motor 216 when the motor is used as an electric motor, and to receive power when the motor is used as a generator.

[0056] according to Figure 2 , the internal combustion engine arrangement 100 may further include a first pressure sensor 250 and a second pressure sensor 260. The first pressure sensor 250 is configured to detect the pressure level of the combustion gas exhausted from the combustion cylinder 200 at a position upstream of the turbine 212. On the other hand, the second pressure sensor 260 is configured to detect the pressure level of the exhaust gas at a position downstream of the turbine 212, preferably the pressure level of the exhaust gas at a position between the turbine 212 and the engine aftertreatment system 230.

[0057] As mentioned above about Figure 1 As described, the internal combustion engine device includes a control unit 140. The control unit 140 includes a processing circuit coupled to the motor 216. For an example in which the internal combustion engine device 100 includes a first pressure sensor 250 and a second pressure sensor 260, the control unit 140 is also preferably coupled to the first pressure sensor 250 and the second pressure sensor 260. In addition, as described in detail below with reference to FIGS. 3 to 5 , the turbine 212 includes a flow control member to which the processing circuit is coupled to controllably adjust the throughput capacity of the turbine 212.

[0058] To describe an example of the turbine 212, reference will now be made to FIG. 3A to FIG. 5B , these figures are exemplary illustrations of different turbines 212, each turbine including specific flow control components.

[0059] First reference FIG. 3A to FIG. 3B , showing the turbine 212 in two different configurations. The turbine 212 includes a turbine inlet 302 for receiving the turbine from the combustion cylinder ( Figure 2200) of the combustion cylinder. The turbine 212 also includes a turbine outlet 304 for discharging the combustion gas expanded by the turbine toward the surrounding environment. In addition, the turbine 212 includes a plurality of turbine blades 305, which are configured to be subjected to the combustion gas from the combustion cylinder ( Figure 2 The combustion gas flow discharged from the turbine shaft ( Figure 2 215) rotational motion.

[0060] In addition, turbine 212 includes a flow control member 306. FIG. 3A to FIG. 3B In the example depicted in , the flow control member 306 includes a plurality of pivoting nozzle vanes 306. Figure 3A In the example depicted in , the processing circuit controls the pivoting nozzle vanes 306 to assume a substantially closed position, allowing only a small amount of combustion gases 301 to be fed to the turbine vanes 305 and further towards the turbine outlet 304. Figure 3A In the example depicted in , the throughput capacity of turbine 212 is therefore reduced. Figure 3B In the example depicted in , the pivoting nozzle vanes 306 are controlled by the processing circuit to assume an open position. The nozzle vanes 306 rotate about the axis of rotation to allow a large amount of combustion gases to be supplied to the turbine blades 305 and further toward the turbine outlet 304. Figure 3A In the example depicted in , the throughput capacity of the turbine 212 is thus reduced. In other words, by controlling the plurality of pivoting nozzle vanes 306, the throughput capacity of the turbine 212 may be adjusted. Figure 3A and 3B The example depicted in FIG. 3 shows only two states, i.e., two different positions of the nozzle vane 306. However, it should be readily understood that the nozzle vane 306 can be controlled to assume other positions than those depicted in the figure. Thus, the opening of the nozzle vane 306 can be controlled to assume other positions to adjust the throughput capacity of the turbine as desired. FIG. 3A to FIG. 3B The turbine shown in may be referred to as a variable geometry turbine.

[0061] Now go to FIG. 4A to FIG. 4B , these figures show another example of a turbine 212. FIG. 3A to FIG. 3B Similar to the example depicted in FIG. 4A to FIG. 4B The turbine 212 is shown in two different configurations. The turbine 212 includes a turbine inlet 302 for receiving the turbine from the combustion cylinder ( Figure 2 200) of the combustion cylinder. The turbine 212 also includes a turbine outlet 304 for discharging the combustion gas expanded by the turbine toward the surrounding environment. In addition, the turbine 212 includes a plurality of turbine blades 305, which are configured to be subjected to the combustion gas from the combustion cylinder ( Figure 2 The combustion gas flow discharged from the turbine shaft ( Figure 2 215) rotational motion.

[0062] In addition, the turbine 212 includes a flow control member 150. FIG. 4A to FIG. 4B In the example depicted in FIG. 1 , the flow control member 150 is formed by an inlet vane 406. The inlet vane 406 is arranged at the turbine inlet 302, i.e., at a position upstream of the turbine blades 305, and can be controlled by the processing circuit in Figure 4A The closed position depicted in Figure 4B , in which the pressure level in the turbine increases, and in which the combustion gases are fed toward the turbine blades 305 and the pressure level in the turbine decreases. Figure 4A In the example depicted in FIG. , the throughput capacity of turbine 212 is thus reduced, and Figure 4B In the depicted example, the throughput capacity is increased. That is, by controlling the inlet vanes 406, the throughput capacity of the turbine 212 can be adjusted. When the inlet vanes 406 are arranged in the closed position, the force acting on the turbine blades will increase. Figure 4A and 4B The example depicted in FIG. 4 shows only two states, i.e., two different positions of the inlet vane 406. However, it should be readily understood that the inlet vane 406 can be controlled to assume other positions than those depicted in the figure. Thus, the opening of the inlet vane 406 can be controlled to assume other positions to adjust the throughput capacity of the turbine as desired.

[0063] Now go to FIG. 5A to FIG. 5B , these figures show another example of a turbine 212. FIG. 3A to FIG. 4B Similar to the example depicted in FIG. 5A to FIG. 5B The turbine 212 is shown in two different configurations. The turbine 212 includes a turbine inlet 302 for receiving the turbine from the combustion cylinder ( Figure 2 200) of the combustion gas 301. The turbine 212 also includes a turbine outlet 304 for discharging the combustion gas expanded by the turbine toward, for example, an engine aftertreatment system. In addition, the turbine 212 includes a plurality of turbine blades 305, which are configured to be subjected to the combustion gas from the combustion cylinder ( Figure 2 The combustion gas flow discharged from the turbine shaft ( Figure 2 215) rotational motion.

[0064] In addition, the turbine 212 includes a flow control member 150. FIG. 5A to FIG. 5BIn the example depicted in FIG. 1 , the flow control member 150 is formed by a valve 506. The valve 506 is arranged at the turbine inlet 302, i.e. at a position upstream of the turbine blades 305, and can be controlled by the processing circuit at Figure 5A The closed position depicted in Figure 5B Controlled between the open positions depicted. Figure 5A and Figure 5B The exemplary turbine 212 depicted in FIG. 5 includes a first flow channel 510 and a second flow channel 520 . The first flow channel 510 and the second flow channel 520 merge into a combined flow channel 530 at a merging location 525 of a plate 535 that separates the first flow channel 510 from the second flow channel 520 .

[0065] When valve 506 takes Figure 5A , the combustion gases are supplied toward the turbine blades 304 only via the second flow channel 520 and subsequently via the combined flow channel 530. Thus, by arranging the valve 506 in the closed position, the combustion gases 301 are prevented from reaching the first flow channel 510, thereby obtaining a reduced throughput capacity of the turbine 212.

[0066] When valve 506 takes Figure 5B , the combustion gas is supplied toward the turbine blades 304 via the first flow channel 510 and the second flow channel 520. The combustion gas 301 supplied through the first flow channel 510 and the second flow channel 520 are then mixed with each other at the combined flow channel 530. Therefore, when the valve 506 takes the open position, a larger amount of the combustion gas 301 reaches the turbine blades 305 than when the valve is in the closed position, thereby obtaining an increased throughput capacity of the turbine 212. That is, by controlling the valve 506, the throughput capacity of the turbine 212 can be adjusted. Figure 5A and Figure 5B The example depicted in FIG. 5 shows only two states, namely the fully closed position and the fully open position of the valve 506. However, it should be readily understood that the valve 506 can be controlled to assume other positions than those depicted in the figure. Therefore, the opening of the valve 506 can be controlled to assume other positions to adjust the throughput capacity of the turbine as required.

[0067] although FIG. 3A to FIG. 5BVarious examples of flow control members 150 are shown, but it should be readily understood that other flow control members 150 may be envisioned to adjust the throughput capacity of the turbine 212. For example, a wastegate may be used to control the flow of combustion gases supplied to the turbine 212. Such a wastegate may be an external wastegate arranged upstream of the turbine inlet 302, where the combustion gases or a portion of the combustion gases may be directed to bypass the turbine, thereby adjusting the throughput capacity of the turbine 212. The wastegate may also be an internal wastegate arranged inside the turbine 212. Furthermore, the flow control member 150 may alternatively be arranged in the form of a sliding wall nozzle, rather than, for example, the rotating nozzle vanes described above.

[0068] To describe the operation of the above-described internal combustion engine arrangement, reference will now be made to Figure 6 and Figure 7 . Figure 6 is an exemplary illustration of operating conditions of a turbine according to an example, and Figure 7 is an exemplary illustration of a flow chart for controlling an internal combustion engine according to an example. In detail, Figure 6 The diagram in schematically shows a total number of operating conditions 602 of the turbine 212. Thus, the turbine 212 is operable to assume substantially any operating condition as a position within the region formed by the abscissa axis 604 and the ordinate axis 606. The operating condition within the region formed by the abscissa axis 604 and the ordinate axis 606 is determined based on at least one of the current operating parameters of the turbine (e.g., structural parameters of the turbine) and the current operating parameters of the exhaust gas discharged from the internal combustion engine 10 (e.g., parameters of the exhaust gas, i.e., not structural parameters). In other words, and according to the example, the exhaust gas flow acting on the turbine (i.e., the current operating parameters of the exhaust gas discharged from the internal combustion engine 10) combined with the position of the flow control component (i.e., the current operating parameters of the turbine) together form the current operating condition of the total number of operating conditions of the turbine.

[0069] The abscissa axis 604 may represent operating parameters of the turbine, such as, for example, FIG. 3A to FIG. 5B The position of the flow control member 150 depicted, the rotational speed of the turbine arrangement 210, etc. The abscissa axis 604 may also represent current operating parameters of the exhaust gas discharged from the internal combustion engine 10, such as, for example, the pressure level of the combustion gases upstream of the turbine, the expansion ratio of the exhaust gas in the turbine, the exhaust gas flow rate of the exhaust gas supplied to the turbine from the exhaust manifold, etc.

[0070] The ordinate axis 606 may also represent operating parameters of the turbine, such as, for example, FIG. 3A to FIG. 5BThe position of the flow control member 150 depicted, the rotational speed of the turbine arrangement 210, etc. However, the ordinate axis 606 may also represent current operating parameters of the exhaust gas discharged from the internal combustion engine 10, such as, for example, the pressure level of the combustion gases upstream of the turbine, the expansion ratio of the exhaust gas in the turbine, the exhaust gas flow rate of the exhaust gas supplied to the turbine from the exhaust manifold, etc.

[0071] Therefore, different parameter combinations can be obtained when determining the current operating condition of the turbine. In other words, the current operating parameters of the turbine 212 are determined S1. In addition, the current operating parameters of the exhaust gas discharged from the internal combustion engine 10 are determined S2. For example, by combining two different current operating conditions of the turbine, two different current operating parameters of the exhaust gas, or the current operating parameters of the turbine 212 with the current operating parameters of the exhaust gas, the current operating condition of the turbine 212 out of the total number of operating conditions can be determined S3.

[0072] In order to simplify the description for the reader in the art, the method of controlling the internal combustion engine device 100 will be presented below as an example, wherein the abscissa axis 604 represents the current operating parameter of the turbine 212 in the form of the current position of the flow control member 150. The ordinate axis 606 also represents the current operating parameter of the turbine 212, but in the form of the rotational speed of the turbine device. As previously mentioned and as is apparent from the above, when determining the current operating condition of the S3 turbine 212, the method described below may also be applied to other parameter combinations. In addition, not only a combination of two parameters can be evaluated, but also a combination of multiple parameters, that is, more than two (such as three or more) parameters can provide the current operating condition of the turbine.

[0073] exist Figure 6 , a predetermined subset of operating conditions 608 is determined from the total number of operating conditions 602. The predetermined subset of operating conditions 608 represents operating conditions that are unfavorable to the turbine 212. Specifically, if the current operating condition 610 of the turbine 212 resulting from the current position of the flow control member 150 combined with the rotational speed of the turbine device falls within the predetermined subset of operating conditions, the turbine may, for example, be subjected to high cycle fatigue loads. High cycle fatigue may be caused by the eigenfrequency of the turbine blade 305 coinciding with the exciting force of the same frequency. This may overcome the inherent damping of the turbine blade 212, thereby causing stress damage to the blade. Therefore, the predetermined subset of operating conditions 608 may represent eigenfrequencies that may cause damage to the turbine 212.

[0074] exist Figure 6, the current operating condition 610 forms part of the predetermined operating condition subset 608. Therefore, the current operating condition 610 of the turbine 212 may cause damage to the turbine 212, that is, the turbine may be subjected to high cycle fatigue loads. In order to avoid the turbine from operating under unfavorable conditions forming the predetermined operating condition subset, the control unit 140 controls the S4 motor 216 to adjust the rotation speed of the turbine device 210. At the same time, the control unit 140 also controls the S5 flow control member 150 to adjust the throughput capacity of the turbine 212. When the control unit 140 controls the motor 216 and the flow control member 150, the current operating condition 610 will change to take a subsequent operating condition 612 that exceeds the predetermined operating condition subset 608. Therefore, the subsequent operating condition 612 will belong to a part of the predetermined remaining operating condition 614. As is apparent from the above, the predetermined operating condition subset 608 and the predetermined remaining operating condition 614 constitute the total number of operating conditions 602 of the turbine 212.

[0075] On the other hand, if the current operating condition does not form part of the predetermined operating condition subset 608, i.e., forms part of the predetermined remaining operating condition 614, the control unit 140 can continue to control the S6 motor 216 and the flow control member 150 as before, i.e., no adjustment based on the operating condition being in the high cycle fatigue region is performed.

[0076] When the control unit 140 controls the motor 216 and the flow control member 150 to make adjustments, not only will the turbine 212 adopt an operating condition beyond the predetermined operating condition subset 608, but the resulting output torque on the crankshaft can be provided within the predetermined range of the desired output torque. In particular, the operating condition of the turbine 212 can be controlled while keeping the internal combustion engine operating as desired. Thus, a dual technical advantage is obtained, wherein the internal combustion engine arrangement 100 can be operated as required while reducing the risk of turbine failure. More or less optimized engine power and reduced emissions can be obtained.

[0077] According to a non-limiting example, the turbine 212 may be particularly susceptible to high cycle fatigue loads during engine braking operation and during heating mode operation. During engine braking operation, the turbine may be subject to backpressure, which may result in the operating conditions of the turbine forming part of the above-mentioned predetermined operating condition subset, especially when aiming to achieve high engine braking power. On the other hand, during heating mode operation, the turbine may be controlled to generate backpressure in order to increase the temperature of the combustion gases supplied to the engine aftertreatment system. By controlling the turbine in this way, there may be a risk that the operating conditions of the turbine 212 form part of the predetermined operating condition subset 608.

[0078] Now go to Figure 8, which is a schematic diagram of a computer system 800 for implementing the examples disclosed herein. The computer system 800 is suitable for executing instructions from a computer-readable medium to perform these and / or any functions or processes described herein. The computer system 800 can be connected (e.g., networked) to other machines in a LAN, an intranet, an extranet, or the Internet. Although only a single device is shown, the computer system 800 may include any device collection that executes an instruction set (or multiple instruction sets) individually or jointly to perform any one or more of the methods discussed herein. Therefore, any reference to a computer system, a computing system, a computer device, a computing device, a control system, a control unit, an electronic control unit (ECU), a processor device, a processing circuit, etc. in the present disclosure and / or claims includes a reference to one or more such devices to execute an instruction set (or multiple instruction sets) individually or jointly to perform any one or more of the methods discussed herein. For example, the control system may include a single control unit or multiple control units connected to each other or otherwise communicatively coupled, so that any executed function can be distributed between the control units as needed. Furthermore, such devices may communicate with each other or other devices through various system architectures, such as directly or via a controller area network (CAN) bus, etc.

[0079] The computer system 800 may include at least one computing device or electronic device that can include firmware, hardware and / or execute software instructions to implement the functionality described herein. The computer system 800 may include a processing circuit 802 (e.g., a processing circuit including one or more processor devices or control units), a memory 804, and a system bus 806. The computer system 800 may include at least one computing device having a processing circuit 802. The system bus 806 provides an interface for system components including, but not limited to, the memory 804 and the processing circuit 802. The processing circuit 802 may include any number of hardware components for performing data or signal processing or for executing computer code stored in the memory 804. The processing circuit 802 may include, for example, a general-purpose processor, a special-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), a circuit containing a processing component, a group of distributed processing components, a group of distributed computers configured for processing, or other programmable logic devices designed to perform the functions described herein, discrete gate or transistor logic, discrete hardware components, or any combination thereof. The processing circuit 802 may also include computer executable code that controls the operation of the programmable device.

[0080] The system bus 806 can be any of several types of bus structures, which can also be interconnected to a memory bus (with or without a memory controller), a peripheral bus, and / or a local bus using any of a variety of bus architectures. The memory 804 can be one or more devices for storing data and / or computer code to complete or facilitate the methods described herein. The memory 804 can include a database component, an object code component, a script component, or any type of information structure for supporting various activities herein. Any distributed or local memory device can be utilized with the systems and methods of this specification. The memory 804 can be communicatively connected to the processing circuit 802 (e.g., via a circuit or any other wired, wireless, or network connection) and can include computer code for performing one or more processes described herein. The memory 804 may include nonvolatile memory 808 (e.g., read-only memory (ROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), etc.) and volatile memory 810 (e.g., random access memory (RAM)), or any other medium that can be used to carry or store desired program code in the form of machine-executable instructions or data structures and that can be accessed by a computer or other machine having the processing circuit 802. A basic input / output system (BIOS) 812 may be stored in the nonvolatile memory 808 and may include the basic routines that help to transfer information between elements within the computer system 800.

[0081] The computer system 800 may also include or be coupled to non-transitory computer-readable storage media such as storage device 814, which may include, for example, an internal or external hard disk drive (HDD) (e.g., enhanced integrated drive electronics (EIDE) or serial advanced technology attachment (SATA)), a HDD for storage (e.g., EIDE or SATA), flash memory, etc. The storage device 814 and other drives associated with computer-readable and computer-usable media may provide non-volatile storage of data, data structures, computer-executable instructions, etc.

[0082] The hard-coded or soft-coded computer code may be provided in the form of one or more modules. The module may be implemented as software and / or hard-coded in the circuit to implement the functionality described herein in whole or in part. The module may be stored in a storage device 814 and / or a volatile memory 810 that may include an operating system 816 and / or one or more program modules 818. All or part of the examples disclosed herein may be implemented as a computer program 820 stored on a temporary or non-temporary computer-usable or computer-readable storage medium (e.g., a single medium or multiple media) such as a storage device 814, which includes complex programming instructions (e.g., complex computer-readable program code) that cause the processing circuit 802 to perform the actions described herein. Therefore, the computer-readable program code of the computer program 820 may include software instructions for implementing the functionality of the examples described herein when executed by the processing circuit 802. In some examples, storage device 814 may be a computer program product (e.g., a readable storage medium) having computer program 820 stored thereon, wherein at least a portion of computer program 820 may be loadable (e.g., loaded into a processor) for implementing the functionality of the examples described herein when executed by processing circuit 802. Processing circuit 802 may serve as a controller or control system of computer system 800 for implementing the functionality described herein.

[0083] The computer system 800 may include an input device interface 822 configured to receive input and selections to be transmitted to the computer system 800 when executing instructions, such as from a keyboard, mouse, touch-sensitive surface, etc. Such input devices can be connected to the processing circuit 802 through an input device interface 822 coupled to the system bus 806, but can be connected through other interfaces (such as a parallel port, an Institute of Electrical and Electronics Engineers (IEEE) 1394 serial port, a universal serial bus (USB) port, an IR interface, etc.). The computer system 800 may include an output device interface 824, which is configured to forward output to a display, a video display unit (e.g., a liquid crystal display (LCD) or a cathode ray tube (CRT)). The computer system 800 may include a communication interface 826 suitable for communicating with a network as appropriate or required.

[0084] The operational actions described in any of the exemplary aspects of this article are described to provide examples and discussions. These actions can be performed by hardware components, can be embodied in machine executable instructions so that a processor performs these actions, or can be performed by a combination of hardware and software. Although a specific order of method actions can be shown or described, the order of actions can be different. In addition, two or more actions can be performed simultaneously or partially simultaneously.

[0085] Example List

[0086] Example 1: An internal combustion engine device, comprising: an internal combustion engine; a turbine device, the turbine device comprising a turbine arranged to be in downstream fluid communication with an exhaust manifold of the internal combustion engine, and a compressor mechanically connected to the turbine, the compressor being arranged to be in upstream fluid communication with an inlet manifold of the internal combustion engine, wherein the turbine comprises a flow control member, the flow control member being configured to controllably adjust the throughput capacity of the turbine; an electric motor operably coupled to the turbine device to control a rotational speed of the turbine device; and a control unit, the control unit comprising a coupling processing circuitry to the electric machine and the flow control member, the processing circuitry being configured to determine a current operating parameter of the turbine, determine a current operating parameter of the exhaust gas discharged from the internal combustion engine, and determine a current operating condition from a total number of operating conditions of the turbine based on at least one of the current operating parameter of the turbine and the current operating parameter of the exhaust gas, and control the electric machine to adjust the rotational speed of the turbine device in response to the current operating condition forming part of a predetermined subset of operating conditions from the total number of operating conditions, and simultaneously control the flow control member to adjust the throughput capacity of the turbine.

[0087] Example 2: An internal combustion engine device according to Example 1, wherein in response to the current operating condition forming part of the predetermined operating condition subset, the electric motor is controlled to adjust the rotational speed of the turbine device so that subsequent operating conditions of the turbine exceed the predetermined operating condition subset.

[0088] Example 3. According to the internal combustion engine device described in any one of Examples 1 or 2, the processing circuit is also configured to: determine the desired output torque of the crankshaft of the internal combustion engine, and control the motor and the flow control member so that the resulting output torque of the crankshaft is within a predetermined range of the desired output torque.

[0089] Example 4. An internal combustion engine arrangement according to any of the preceding examples, wherein the flow control member is located upstream of turbine blades of the turbine.

[0090] Example 5. An internal combustion engine arrangement according to any of the preceding examples, wherein the turbine is a variable geometry turbine.

[0091] Example 6. An internal combustion engine arrangement according to any of the preceding examples, wherein the flow control member is one of a pivoting nozzle vane, an adjustable vane arranged at a turbine inlet, or a flow control valve arranged at the turbine inlet.

[0092] Example 7. An internal combustion engine arrangement according to any of the preceding examples, wherein the current operating parameter of the turbine comprises a current position of the flow control component.

[0093] Example 8. An internal combustion engine arrangement according to any of the preceding examples, wherein the current operating parameter of the turbine comprises a rotational speed of the turbine arrangement.

[0094] Example 9. An internal combustion engine arrangement according to any of the preceding examples, wherein the current operating parameter of the exhaust gas comprises a pressure level upstream of the turbine.

[0095] Example 10. An internal combustion engine arrangement according to any of the preceding examples, wherein the current operating parameter of the exhaust gas comprises an expansion ratio of the exhaust gas in the turbine.

[0096] Example 11. An internal combustion engine arrangement according to any of the preceding examples, wherein the current operating parameter of the exhaust gas comprises an exhaust gas flow rate of the exhaust gas supplied from the exhaust manifold to the turbine.

[0097] Example 12. An internal combustion engine arrangement according to any of the preceding examples, wherein the predetermined subset of operating conditions is formed by a predetermined set of predetermined threshold limits.

[0098] Example 13. An internal combustion engine arrangement according to any of the preceding examples, wherein the internal combustion engine arrangement further comprises a first pressure sensor arranged to detect a pressure level upstream of the turbine.

[0099] Example 14. An internal combustion engine arrangement according to any of the preceding examples, wherein the internal combustion engine arrangement further comprises a second pressure sensor arranged to detect a pressure level of the exhaust gas downstream of the turbine.

[0100] Example 15. An internal combustion engine device according to any one of the preceding examples, wherein the internal combustion engine is configured to perform engine braking operation, the processing circuit is further configured to receive a signal indicative of the engine braking operation of the internal combustion engine, and when the internal combustion engine performs the engine braking operation, the motor and the flow control component are controlled in response to the current operating condition forming part of the predetermined operating condition subset.

[0101] Example 16. An internal combustion engine device according to any one of the preceding examples, wherein the internal combustion engine device also includes an engine aftertreatment system arranged to be fluidically connected to the turbine downstream, and the processing circuit is further configured to receive a signal indicating a temperature adjustment mode of the engine aftertreatment system, and when the engine aftertreatment system adopts the temperature adjustment mode, control the motor and the flow control component in response to the current operating condition forming part of the predetermined operating condition subset.

[0102] Example 17. An internal combustion engine arrangement according to example 16, wherein the temperature regulation mode is a heating mode in which a temperature level of the engine aftertreatment system is increased above a predetermined threshold temperature level.

[0103] Example 18. A vehicle comprising an internal combustion engine arrangement according to any of the preceding examples.

[0104] Example 19. A method for controlling an internal combustion engine device, the internal combustion engine device comprising an internal combustion engine and a turbine device, the method comprising: determining, by a processing circuit, current operating parameters of a turbine of the turbine device, the turbine being arranged to be fluidically connected to an exhaust manifold of the internal combustion engine in a downstream manner; determining, by the processing circuit, current operating parameters of exhaust gas discharged from the internal combustion engine; determining, by the processing circuit, a current operating condition from a total number of operating conditions of the turbine based on at least one of the current operating parameters of the turbine and the current operating parameters of the exhaust gas, and forming a part of a predetermined subset of operating conditions from the total number of operating conditions in response to the current operating condition: controlling, by the processing circuit, an electric motor connected to the turbine to adjust the rotational speed of the turbine device, and simultaneously controlling, by the processing circuit, a flow control component of the turbine to adjust the throughput capacity of the turbine.

[0105] Example 20. A computer program product comprising program code for performing the method according to Example 19 when executed by a processing circuit.

[0106] Example 21. A non-transitory computer-readable storage medium comprising instructions which, when executed by a processing circuit, cause the processing circuit to perform the method according to Example 19.

[0107] The terms used herein are only for the purpose of describing specific aspects and are not intended to limit the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "a kind of" and "the" are intended to also include plural forms. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. It should also be understood that the terms "include", "comprising" when used herein specify the presence of stated features, integers, actions, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, actions, steps, operations, elements, parts and / or their groups.

[0108] It should be understood that although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the present disclosure, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0109] Relative terms such as "below" or "above" or "upper" or "lower" or "horizontal" or "vertical" may be used herein to describe the relationship of one element to another element, as shown in the figures. It should be understood that these terms and those discussed above are intended to cover different device orientations in addition to the orientations depicted in the figures. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, the element may be directly connected or directly coupled to the other element, or there may be intervening elements. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements.

[0110] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. It should also be understood that, unless otherwise clearly defined herein, the terms used herein should be interpreted as meanings consistent with their meanings in the context of this specification and the relevant art, and should not be interpreted in an idealized or overly formal sense.

[0111] It should be understood that the present disclosure is not limited to the aspects described above and shown in the accompanying drawings; rather, the skilled person will recognize that many changes and modifications may be made within the scope of the present disclosure and the appended claims. In the drawings and description, various aspects have been disclosed for illustrative purposes only and not for limiting purposes, and the scope of the present disclosure is set forth in the appended claims.

Claims

1. An internal combustion engine device, comprising: - Internal combustion engines; - a turbine arrangement comprising a turbine arranged in downstream fluid communication with an exhaust manifold of the internal combustion engine, and a compressor mechanically connected to the turbine, the compressor being arranged in upstream fluid communication with an inlet manifold of the internal combustion engine, wherein the turbine comprises a flow control member configured to controllably adjust a throughput capacity of the turbine; - an electric machine operatively coupled to the turbine arrangement to control the rotational speed of the turbine arrangement; as well as - a control unit comprising a processing circuit coupled to the motor and the flow control member, the processing circuit being configured to: - determining the current operating parameters of the turbine, - determining current operating parameters of exhaust gas emitted from said internal combustion engine, and - determining a current operating condition from a total number of operating conditions of the turbine based on at least one of the current operating parameter of the turbine and the current operating parameter of the exhaust, and forming a part of a predetermined subset of operating conditions from the total number of operating conditions in response to the current operating condition: - controlling the electric motor to adjust the rotational speed of the turbine device, and at the same time - controlling the flow control element to adjust the throughput capacity of the turbine.

2. An internal combustion engine arrangement according to claim 1, wherein in response to the current operating condition forming part of the predetermined operating condition subset, the electric machine is controlled to adjust the speed of the turbine arrangement so that subsequent operating conditions of the turbine exceed the predetermined operating condition subset.

3. The internal combustion engine device according to any one of claims 1 or 2, wherein the processing circuit is further configured to: - determining a desired output torque of a crankshaft of the internal combustion engine, and - controlling the electric machine and the flow control member such that the resulting output torque of the crankshaft is within a predetermined range of the desired output torque.

4. An internal combustion engine arrangement according to any one of the preceding claims, wherein the flow control member is located upstream of turbine blades of the turbine.

5. An internal combustion engine arrangement according to any one of the preceding claims, wherein the turbine is a variable geometry turbine.

6. An internal combustion engine arrangement according to any one of the preceding claims, wherein the flow control member is one of a rotating nozzle vane, an adjustable vane arranged at a turbine inlet or a flow control valve arranged at the turbine inlet.

7. An internal combustion engine arrangement according to any one of the preceding claims, wherein the current operating parameters of the turbine include a current position of the flow control component.

8. An internal combustion engine arrangement according to any one of the preceding claims, wherein the current operating parameter of the turbine comprises a rotational speed of the turbine arrangement.

9. An internal combustion engine arrangement according to any one of the preceding claims, wherein the current operating parameter of the exhaust gas comprises a pressure level upstream of the turbine.

10. An internal combustion engine arrangement according to any one of the preceding claims, wherein the current operating parameter of the exhaust gas comprises an expansion ratio of the exhaust gas in the turbine.

11. An internal combustion engine arrangement according to any one of the preceding claims, wherein the current operating parameter of the exhaust gas comprises an exhaust gas flow rate of the exhaust gas supplied from the exhaust manifold to the turbine.

12. An internal combustion engine arrangement according to any one of the preceding claims, wherein the predetermined subset of operating conditions is formed by a predetermined set of predetermined threshold limits.

13. An internal combustion engine arrangement according to any one of the preceding claims, wherein the internal combustion engine arrangement further comprises a first pressure sensor arranged to detect a pressure level upstream of the turbine.

14. An internal combustion engine arrangement according to any one of the preceding claims, wherein the internal combustion engine arrangement further comprises a second pressure sensor arranged to detect a pressure level of the exhaust gas downstream of the turbine.

15. An internal combustion engine arrangement according to any one of the preceding claims, wherein the internal combustion engine is configured to employ engine braking operation, the processing circuit being further configured to: - receiving a signal indicative of an engine braking operation of said internal combustion engine, and - when the internal combustion engine assumes the engine braking maneuver, controlling the electric machine and the flow control member in response to the current operating condition forming part of the predetermined subset of operating conditions.

16. An internal combustion engine arrangement according to any one of the preceding claims, wherein the internal combustion engine arrangement further comprises an engine aftertreatment system arranged in fluid communication downstream of the turbine, the processing circuit being further configured to: - receiving a signal indicative of a temperature adjustment mode of the engine aftertreatment system, and - when the engine aftertreatment system assumes the temperature regulation mode, controlling the electric machine and the flow control member in response to the current operating conditions forming part of the predetermined subset of operating conditions. 17 . The internal combustion engine arrangement of claim 16 , wherein the temperature regulation mode is a heating mode in which a temperature level of the engine aftertreatment system is increased above a predetermined threshold temperature level.

18. A vehicle comprising an internal combustion engine arrangement according to any one of the preceding claims.

19. A method of controlling an internal combustion engine arrangement, the internal combustion engine arrangement comprising an internal combustion engine and a turbine arrangement, the method comprising: - determining, by means of a processing circuit, current operating parameters of a turbine of said turbine arrangement, said turbine being arranged in downstream fluid communication with an exhaust manifold of said internal combustion engine; - determining, by means of said processing circuit, current operating parameters of exhaust gas emitted from said internal combustion engine; - determining, by the processing circuit, a current operating condition from a total number of operating conditions of the turbine based on at least one of the current operating parameter of the turbine and the current operating parameter of the exhaust, and forming a part of a predetermined subset of operating conditions from the total number of operating conditions in response to the current operating condition: - controlling the electric machine coupled to the turbine by the processing circuit to adjust the rotational speed of the turbine device, and at the same time - Controlling a flow control member of the turbine by means of the processing circuit to adjust the throughput capacity of the turbine.

20. A computer program product comprising program code for performing the method according to claim 19 when executed by a processing circuit.

21. A non-transitory computer-readable storage medium comprising instructions that, when executed by a processing circuit, cause the processing circuit to perform the method of claim 19.

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