Internal combustion engine for a motor vehicle, in particular for a car

Abstract

Internal combustion engine (1) for a motor vehicle, comprising an output shaft, a fan (5), at least one auxiliary unit (7) different from the fan (5), and a wrapping drive (8) comprising at least one wrapping wheel (9) that can be driven by the output shaft and at least one wrapping means (10) that wraps around the wrapping wheel (9) and can be driven by the output shaft via the wrapping wheel (9), and by which at least the auxiliary unit (7) can be driven by the output shaft, characterized by: - a second wrap wheel (12); - a third wrap wheel (13); - a second wrapping means (14) which wraps around the first wrapping wheel (9) and the second wrapping wheel (12), which can be driven by the output shaft via the second wrapping means (14) and the first wrapping wheel (9); and - a third wrapping means (15) which wraps around the second wrapping wheel (12) and the third wrapping wheel (13), so that the fan (5) can be driven by the second wrapping wheel (12) via the third wrapping wheel (13) and the third wrapping means (15).

Description

[0001] The invention relates to an internal combustion engine for a motor vehicle, in particular for a motor car, according to the preamble of claim 1.

[0002] Internal combustion engines of this type for motor vehicles, particularly for cars such as passenger vehicles, are already well known from the general state of the art. Each internal combustion engine has an output shaft, for example a crankshaft, through which the engine can provide torque to propel the motor vehicle. Furthermore, the engine has a fan and at least one auxiliary component, distinct from the fan, which can be driven, for example, by the output shaft.Furthermore, the internal combustion engine has a wrapping drive which has at least one wrapping wheel which can be driven by the output shaft and at least one wrapping means which at least partially encircles the wrapping wheel and can be driven by the output shaft via the wrapping wheel, and via which at least the auxiliary unit can be driven by the output shaft.

[0003] The drive wheel is also referred to as a wheel or drive wheel. In particular, the drive mechanism may be designed as a belt drive, with the drive element being, for example, a belt. In this case, the drive wheel is designed as a pulley.

[0004] US patent 2009 / 0298646A1 discloses an internal combustion engine with auxiliary components. DE 2846775A1 discloses an internal combustion engine with a sound-absorbing casing that at least partially covers the engine surface. Furthermore, DE 102010005423B4 discloses a pulley assembly for mounting on the crankshaft of an internal combustion engine.

[0005] The object of the present invention is to further develop an internal combustion engine of the type mentioned above in such a way that the fan can be driven particularly advantageously.

[0006] This problem is solved according to the invention by an internal combustion engine with the features of claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.

[0007] The internal combustion engine according to the invention for a motor vehicle, in particular for a motor vehicle such as a passenger car, has an output shaft, a fan, at least one auxiliary unit different from the fan and a wrapping drive, which has at least one wrapping wheel that can be driven by the output shaft and at least one wrapping means that wraps around the wrapping wheel and can be driven by the output shaft via the wrapping wheel, by means of which at least the auxiliary unit can be driven by the output shaft.

[0008] To achieve a particularly advantageous drive for the fan, which is preferably designed as a viscous fan, the invention provides a second wrapping wheel, a third wrapping wheel, a second wrapping element, and a third wrapping element. The second wrapping element wraps around the first and second wrapping wheels at least partially, with the second wrapping wheel being driven by the output shaft via the second wrapping element and the first wrapping wheel. The third wrapping element wraps around the second and third wrapping wheels at least partially, so that the fan is driven by the second wrapping wheel via the third wrapping wheel and the third wrapping element.The fan, in particular at least one fan wheel of the fan, can thus be driven, in particular mechanically driven, via the third wrapping wheel, the third wrapping means, the second wrapping wheel, the second wrapping means and the first wrapping wheel from the output shaft, for example designed as a crankshaft.

[0009] The invention is based on the understanding that, in conventional internal combustion engines, the fan, preferably designed as a viscous fan, is typically driven in a corresponding assembly by means of the same wrapping element, for example, a belt, by means of which the auxiliary unit, for example, a water pump, is also driven. In particular, it can be provided that the water pump, or a pumping element of the water pump designed for pumping a liquid, especially water, and the fan, especially the aforementioned impeller of the fan, are driven via the same shaft by the same wrapping element and, via this, by the output shaft.For example, the fan is rigidly coupled to the water pump shaft, for instance, by being screwed to the shaft. This only allows for a rigid connection, particularly between the water pump and the fan. Furthermore, the fan's position depends on the water pump's position. Specifically, the fan is used to generate an airflow, primarily for cooling, and to supply, for example, a cooling module with this airflow. Since the fan's position depends on the water pump's position, the fan's position cannot be precisely aligned with the cooling module, or only with compromises.Furthermore, the fan cannot be adapted to specific vehicle derivatives, particularly with regard to its positioning, which is especially disadvantageous with regard to generating sufficient water clearance in off-road vehicles or with regard to sports car applications.

[0010] These problems and disadvantages can now be avoided in the internal combustion engine according to the invention, since the fan can be driven particularly advantageously via the second and third wrapping elements. For example, the second wrapping wheel, the third wrapping wheel, the second wrapping element, and the third wrapping element are components of an auxiliary drive via which the fan can be driven particularly advantageously. In particular, the auxiliary drive enables the realization of a particularly advantageous transmission for driving the fan, so that, for example, a rigid coupling of the transmission via which the fan can be driven to a water pump or other auxiliary unit can be avoided.Furthermore, the water pump can be relieved of some of the power load compared to conventional combustion engines, so that, for example, simple, cost-effective and lightweight bearings can be used for the water pump.

[0011] A further advantage of the internal combustion engine according to the invention is that, for example, a basic drive, via which the auxiliary unit can be driven from the output shaft, can remain structurally unchanged, particularly when creating different vehicle derivatives. In this context, the auxiliary drive, for instance, forms an additional solution to the basic drive, thus enabling a modular design for the internal combustion engine. Within this modular framework, the basic drive and the auxiliary drive represent modular elements that can be combined particularly advantageously. Furthermore, it can be avoided that the basic drive is additionally burdened with power to drive the fan, thus eliminating the need for new tests and design modifications of the basic drive.In particular, it is possible to simply omit the fan and thus the auxiliary drive in corresponding vehicle design variants, so that different design variants or derivatives of the vehicle can be created in a simple and cost-effective way.

[0012] Furthermore, the advantage can be realized that the fan can be positioned particularly advantageously, especially in relation to other conventional internal combustion engines and / or to at least one cooling module, so that, for example, the fan's position can be chosen at least essentially freely. Thus, the fan, especially with regard to its positioning, can be adapted to different vehicle variants with particular flexibility and according to requirements, since the fan no longer has to be rigidly mounted in the main drive and, for example, on the water pump.

[0013] In an advantageous embodiment of the invention, a console is provided, mounted on a housing element of the internal combustion engine, on which the second and third wrapping wheels are rotatably mounted. The housing element is, for example, an engine housing, in particular a crankcase, of the internal combustion engine, wherein, for example, the output shaft is rotatably mounted on the housing element. The use of the console enables particularly simple and modular use and positioning of the auxiliary drive and thus of the fan.

[0014] Preferably, the fan, and in particular its impeller, is rotatably mounted or supported on the console. For example, the impeller is rotatably mounted on the console via a shaft, from which the impeller can be driven or to which, for example, the third impeller is non-rotatably connected.

[0015] It has proven particularly advantageous if the console has at least one support arm on which the third wrapping wheel is rotatably mounted. The support arm penetrates a first opening defined by the second wrapping element and a second opening defined by the third wrapping element, thus minimizing the space required for the internal combustion engine. The second and third wrapping elements, for example, form a continuous loop that at least partially encircles the respective wrapping wheels. Each continuous loop forms or defines the respective opening through which the support arm penetrates.

[0016] In a particularly advantageous embodiment of the invention, an additional auxiliary unit, separate from the auxiliary unit and the fan, is provided, which can be driven by the second wrap-around wheel. This allows for a particularly simple, cost-effective, and space-saving integration of the second auxiliary unit into the internal combustion engine.

[0017] It has proven particularly advantageous to mount the second auxiliary unit on the console. This allows for a virtually lateral force-free drive of the second auxiliary unit, especially via the power take-off. For example, a modular design can be implemented, enabling the internal combustion engine to be easily and efficiently equipped with the second auxiliary unit as needed, or the second auxiliary unit can simply be omitted, particularly without structurally affecting the main engine and the power take-off.

[0018] Preferably, a coupling is provided through which the second auxiliary unit can be driven by the second wrap wheel. The coupling is, for example, a positive-locking coupling and, in particular, designed as a jaw coupling. The coupling is switchable, for example, between at least one coupled state and at least one uncoupled state. In the coupled state, the second auxiliary unit is coupled to the second wrap wheel via the coupling, in particular in a rotationally fixed manner, whereby the second auxiliary unit can be driven by the second wrap wheel via the coupling. In the uncoupled state, however, the second auxiliary unit is decoupled from the second wrap wheel, so that the second auxiliary unit cannot be driven by the second wrap wheel via the coupling. This allows the second auxiliary unit to be switched on and off as needed and in a particularly efficient manner, and to be driven with exceptional efficiency.

[0019] Another embodiment is characterized in that the second auxiliary unit is designed as a fluid pump. In particular, the second auxiliary unit is, for example, a so-called hydraulic pump, by means of which a hydraulic fluid can be pumped. The hydraulic fluid is used, for example, to actuate at least one hydraulically actuated actuator, in particular a transmission of the motor vehicle. The hydraulic fluid is, for example, a fluid other than water and can be oil.

[0020] In a particularly advantageous embodiment of the invention, the second wrapping wheel and / or the third wrapping wheel has a turret clamping system for clamping the respective wrapping element. Such a turret clamping system, in particular its function, is known, for example, from DE 10 2010 005 423 B4, the disclosure and content of which are to be regarded in their entirety as part of the present disclosure.

[0021] In a further embodiment of the invention, the first auxiliary unit is designed as a coolant pump, in particular as a coolant pump, by means of which, for example, a cooling medium different from the aforementioned hydraulic fluid, in particular a cooling liquid, can be pumped. The cooling liquid is also referred to as cooling water or simply as water, so that, for example, the first auxiliary unit is designed as the aforementioned water pump.

[0022] Finally, it has proven particularly advantageous to provide a third auxiliary unit, especially an electric motor, which can be driven from the output shaft via the first wrapping element and the first wrapping wheel. The first auxiliary unit and the third auxiliary unit can thus be driven, for example, by the aforementioned main drive or, via the main drive, from the output shaft, the main drive comprising, for example, the first wrapping element and the first wrapping wheel. Furthermore, the first wrapping wheel also belongs, for example, to the auxiliary drive, also referred to as the secondary drive, since the fan and the second auxiliary unit, for example, can be driven from the output shaft via the first wrapping wheel.

[0023] Further details of the invention will become apparent from the following description of preferred embodiments with the accompanying drawings. These show: Fig. 1 a schematic front view of an internal combustion engine according to a first embodiment for a motor vehicle, with a main drive for driving at least two auxiliary units, and with an auxiliary drive for driving a fan, wherein the auxiliary drive has at least two wrapping wheels and at least two wrapping means; Fig. 2 a schematic and perspective front view of the basic shoot; Fig. 3 a schematic and perspective front view of the main shoot and the side shoot; Fig. 4 a schematic and perspective top view of the side shoot; Fig. 5 a schematic and perspective side view of the lateral shoot; Fig. 6 a schematic side view of the secondary drive and the fan; Fig. 7 a schematic and perspective rear view of the secondary drive and the fan; Fig. 8. A schematic and perspective side view of the internal combustion engine according to a second embodiment, shown in part; and Fig. 9. Partially a schematic and perspective front view of the internal combustion engine according to the second embodiment.

[0024] In the figures, identical or functionally equivalent elements are provided with the same reference symbols.

[0025] Fig. Figure 1 shows a schematic front view of an internal combustion engine, designated as 1 in its entirety, according to a first embodiment for a motor vehicle, in particular for a motor car such as a passenger car. The motor vehicle can be driven by the internal combustion engine 1. The internal combustion engine 1 is designed as a reciprocating piston engine. As shown in Fig. As can be seen from Figure 1, the internal combustion engine 1 is furthermore designed in a V-configuration. The internal combustion engine 1 has at least one housing element designed as an engine housing 2, which is, for example, designed as a crankcase, in particular as a cylinder crankcase, or comprises at least one such crankcase, in particular at least one such cylinder crankcase. The housing element (engine housing 2) forms, for example, a plurality of combustion chambers of the internal combustion engine 1, wherein the combustion chambers are, for example, designed as cylinders. For example, two cylinder banks are formed by the engine housing 2, each cylinder bank having several cylinders arranged in a row. Each cylinder has, for example, a central axis, which is also referred to as the cylinder axis.Furthermore, the internal combustion engine 1 comprises at least one cylinder head 3 or 4 per cylinder bank, which is connected to the engine housing 2.

[0026] The internal combustion engine 1 further comprises an output shaft, not shown in detail in the figures, which is designed as a crankshaft. The output shaft is rotatably mounted on the engine housing 2 and is thus rotatable about an axis of rotation relative to the engine housing 2. The internal combustion engine 1 can provide torque for driving the motor vehicle via the output shaft, which is preferably designed as a crankshaft.

[0027] As seen in conjunction with Fig. 6 and Fig. As can be seen in Figure 7, the internal combustion engine 1 includes a fan 5, which is designed as a viscous fan. As will be explained in more detail below, the fan 5, in particular its impeller 6, is driven by the output shaft and is therefore rotatable about an axis of rotation relative to the engine housing 2. By rotating the impeller 6, an airflow acting as a cooling airflow is generated or conveyed. For example, a cooling module of the vehicle (not shown in the figure) can be supplied with the airflow, since the airflow can flow around the cooling module. Thus, the cooling module can be cooled by the airflow generated by the fan 5. Furthermore, the cooling module can be cooled by a coolant, for example, a cooling liquid, which is also referred to as water or cooling water.The coolant can also flow through the internal combustion engine 1, in particular the engine block 2 and / or the respective cylinder head 3 or 4, thereby cooling the engine block 2 or the respective cylinder head 3 or 4. This heats the coolant, which can then flow through the cooling module. The heated coolant can be cooled by means of the cooling module, as heat can be transferred from the coolant to the airflow around the cooling module.

[0028] The characteristic that the fan 5 is designed as a viscous fan means that the fan 5 functions like a viscous coupling. The fan 5 comprises, for example, the impeller 6 and a drive plate, which—as will be explained in more detail below—can be driven by the output shaft. The drive plate is, for example, housed in a working chamber, which is at least partially formed by the housing of the fan 5. The housing is, for example, rotationally fixed to the impeller 6, in particular by the impeller 6 itself. By introducing a viscous fluid into the working chamber, the drive plate is coupled to the housing via the viscous fluid, similar to a viscous coupling. This allows the housing, and thus the impeller 6, to be driven by the drive plate via the viscous fluid, and in turn by the impeller, by the output shaft.However, if the viscous fluid is discharged from the working chamber, particularly at least predominantly or completely, the housing and thus the fan wheel 6 are decoupled from the drive plate, so that the drive plate and thus the output shaft cannot drive the fan wheel 6. The supply and discharge of viscous fluid into and out of the working chamber is controlled, for example, by means of a bimetallic strip, whereby the bimetallic strip deforms accordingly depending on a temperature, in particular that of the cooling module and / or the internal combustion engine 1. This deformation of the bimetallic strip regulates the supply and discharge of the viscous fluid into and out of the working chamber.

[0029] The internal combustion engine 1 also features a first auxiliary unit, different from the fan 5, which is provided in addition and is in the form of a particularly well designed Fig. The coolant pump 7 is identifiable and is used to pump the aforementioned coolant. Since the coolant is also referred to as cooling water or water, the coolant pump 7 is also called a water pump.

[0030] Furthermore, the internal combustion engine 1 comprises a drive system 8, which is, for example, designed as a belt drive. The drive system 8 has at least one first drive wheel in the form of a pulley 9, which can be driven by the output shaft and is, for example, non-rotatably connected to the output shaft. In particular, the pulley 9 is, for example, bolted to the output shaft. The drive system 8 also comprises at least one first drive element in the form of a first belt 10, which at least partially encircles the pulley 9 and can thus be driven by the output shaft via the pulley 9. Furthermore, the coolant pump 7 is driven by the belt 10 and, thus, by the output shaft via the belt 10 and the pulley 9. The coolant pump 7 has, for example, at least one pump element, not shown in detail in the figures, which is rotatable about an axis of rotation.By rotating the pump element around its associated axis of rotation, the coolant is pumped. The pump element is, for example, fixedly connected to a shaft. The drive mechanism 8 includes a pulley 11, which drives the shaft and thus the pump element. Specifically, the pulley 11 is fixedly connected to the shaft. The belt 10 wraps around the pulley 11, at least partially, so that the pump element can be driven by the output shaft via the shaft, the pulley 11, the belt 10, and the pulley 9.

[0031] In order to achieve a particularly advantageous drive for the fan 5, especially the fan wheel 6, the internal combustion engine 1 comprises a particularly well-designed Fig. 3. A second encircling wheel in the form of a pulley 12, a third encircling wheel in the form of a pulley 13, a second encircling element in the form of a belt 14, and a third encircling element in the form of a belt 15. The belts 14 and 15 are preferably elastic belts. For example, the belts 14 and 15, as well as the pulleys 12 and 13, are components of an auxiliary drive, which is also referred to as a secondary drive and which, for example, also includes the pulley 9. The encircling drive 8 is, for example, a primary drive, which includes the belt 10, the pulley 11, and the pulley 9. Thus, for example, the pulley 9 is assigned to both the primary drive and the auxiliary drive, via which the fan 5 or the fan wheel 6 can be driven.

[0032] Belt 14 wraps at least partially around pulley 9 and pulley 12, so that pulley 12 can be driven from the output shaft via belt 14 and pulley 9. Furthermore, belt 15 wraps at least partially around pulley 12 and pulley 13, so that fan 5 can be driven from pulley 12 via pulley 13 and belt 15. Overall, fan 5, and in particular fan wheel 6, can thus be driven from the output shaft via pulley 13, belt 15, pulley 12, belt 14, and pulley 9. How particularly good from Fig. As can be seen in Figure 4, the belt 10 at least partially wraps around a first wrap area 16 of the pulley 9, while the belt 14 at least partially wraps around a second wrap area 17 of the pulley 9. The wrap areas 16 and 17 are arranged one after the other, or consecutively, in the axial direction of the pulley 9. Similarly, the belt 14 wraps around a third wrap area 18 of the pulley 12, while the belt 15 wraps around a fourth wrap area 19 of the pulley 12. The wrap areas 18 and 19 are arranged one after the other, or consecutively, in the axial direction of the pulley 12.

[0033] The wrapping regions 16 and 17 are preferably formed integrally, but could alternatively be formed by separately formed individual components which are connected to each other, for example, in a rotationally fixed manner. The wrapping regions 18 and 19 are preferably formed integrally, but could alternatively be formed by separately formed individual components which are connected to each other, for example, in a rotationally fixed manner.

[0034] Overall, it is evident that the fan 5 can be driven via the auxiliary drive from the output shaft, thus avoiding a rigid transmission coupling to the water pump (coolant pump 7). Furthermore, the fan 5 can be positioned as needed and therefore particularly advantageously relative to the cooling module, enabling effective cooling.

[0035] The encircling shoot 8, which is developed or functions as the basic drive, is particularly well suited to Fig. 2 recognizable. Fig. Figure 3 shows the main shoot and the side shoot. As shown from Fig. 2 and Fig. As can be seen in Figure 3, the internal combustion engine 1, or rather the basic drive, can be extended to include the auxiliary drive in a particularly simple and modular manner, thus enabling a modular system. Furthermore, the internal combustion engine 1 exhibits a particularly well-designed Fig. 3, Fig. 4 to Fig. 5. A recognizable console 20, which may, for example, be formed in one piece. The console 20 is preferably held or attached to the motor housing 2. In particular, it is possible that the console 20 is attached, for example, by means of a particularly well-integrated Fig. 4 and Fig. The motor housing 2 is screwed to the motor housing 2 by 5 visible screws 21 and is thereby attached to the motor housing 2. The pulleys 12 and 13 are rotatably held or mounted on the console 20. In particular, it is conceivable that the fan 5, especially the fan wheel 6, is rotatably mounted on the console 20. For this purpose, for example, a Fig. A recognizable shaft 22 is provided, which is at least partially received in a corresponding receptacle 23 of the console 20, for example designed as a through-opening, and is rotatably mounted in the receptacle 23 on the console 20. The shaft 22 can, for example, be driven by the pulley 13. In particular, the pulley 13 is non-rotatably connected to the shaft 22.

[0036] The fan wheel 6 can be driven by the shaft 22 in the manner described. For example, the aforementioned drive disc can be driven by the shaft 22 or is rotationally fixed to the shaft 22. For example, the housing, and thus the fan wheel 6, is rotatably mounted on the shaft 22 and thus supported on the bracket 20 via the shaft 22. While, for example, the fan wheel 6, or the fan 5, is arranged axially in the direction of the pulley 13 on a first side of the bracket 20 facing away from the motor housing 2 in the axial direction of the pulley 13, the pulley 13 is arranged axially on a second side of the bracket 20 opposite the first side and facing the motor housing 2. This allows the installation space requirement to be kept particularly small.In particular, the console 20 is reversibly detachable from the engine housing 2, so that the internal combustion engine 1 can be equipped with the auxiliary drive as required.

[0037] The console 20 has at least one support arm 24 which penetrates a through-opening 25 formed by the belt 14 and a through-opening 26 formed by the belt 15. Thus, the console 20 extends from the motor housing 2 through the through-openings 25 and 26 to the pulley 13 and the shaft 22, respectively.

[0038] The internal combustion engine 1 also has an auxiliary unit in the form of an electric machine 27, which can be driven from the output shaft via the belt 10 and the pulley 9. For this purpose, the electric machine 27 has a rotor which is non-rotatably connected to a rotating pulley 28, or can be driven by the pulley 28. The belt 10 at least partially wraps around the pulley 28, so that the rotor, and thus the electric machine 27, can be driven from the output shaft via the pulley 28, the belt 10, and the pulley 9. Therefore, the electric machine 27 can be driven from the output shaft via the main drive. The electric machine 27 is, for example, a generator, which is also referred to as an alternator.

[0039] The internal combustion engine 1 includes a further auxiliary unit in the form of an air conditioning compressor 29. The air conditioning compressor 29 can, for example, pump and compress a refrigerant for the vehicle's air conditioning system. The air conditioning compressor 29 can be driven by the output shaft via the main drive. The air conditioning compressor 29 has, for example, a further pump element (not visible in the figure) for pumping and compressing the refrigerant. This pump element can be driven, for example, by another shaft of the air conditioning compressor 29 and is, in particular, rotationally fixed to this other shaft. Furthermore, this other shaft can be driven by a pulley in the form of a belt pulley 30, with the other shaft being rotationally fixed to the belt pulley 30. The belt 10 wraps around the belt pulley 30, at least partially, so that the main drive also includes the belt pulleys 28 and 30.The air conditioning compressor 29 can thus be driven by the output shaft via the pulley 30, the belt 10 and the pulley 9 in order to pump the refrigerant.

[0040] As an alternative to the rotationally fixed coupling of the pump element, particularly via the secondary shaft, to the pulley 30, a coupling device can be provided which, for example, can be switched between an enabled state and a locked state. In the locked state, the secondary pump element of the air conditioning compressor 29 is coupled to the pulley 30 via the coupling device and can thus be driven by the pulley 30. In the enabled state, however, the secondary pump element of the air conditioning compressor 29 is decoupled from the pulley 30, so that the secondary pump element, and thus the air conditioning compressor 29 as a whole, is not driven by the output shaft. This allows the air conditioning compressor 29 to be switched on and off as needed.

[0041] Preferably, the pulley 12, for example, has at least one turret tensioning system for tensioning the belt 14 and / or the belt 15. Alternatively or additionally, it is conceivable that the pulley 13, for example, has a turret tensioning system for tensioning the belt 15.

[0042] Since at the in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 to Fig. In the first embodiment shown in Figure 7, where both belt 14 and belt 15 at least partially encircle pulley 12, pulley 12 is, for example, designed as a double pulley. Furthermore, pulley 9 is, for example, designed as a double pulley, since both belt 14 and belt 10 encircle pulley 9. In this case, for example, the encircling areas 16 and 17 are formed integrally or connected to each other in a rotationally fixed manner. Alternatively or additionally, the encircling areas 18 and 19 can be formed integrally or connected to each other in a rotationally fixed manner.

[0043] At the in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 to Fig. In the illustrated embodiment 7, the pulley 12 has a turret tensioning system for tensioning the belt 15. The turret tensioning system comprises, for example, a drive pulley and a hub component. The drive pulley forms, for example, the wrap area 19, wherein, in the fully assembled state of the internal combustion engine 1, the drive pulley is rotationally fixed to the hub component. To achieve a pre-assembly state, the drive pulley is, for example, arranged on the hub component, wherein, in the pre-assembly state, the drive pulley is, for example, rotationally fixed to the hub component, but in the pre-assembly state, the drive pulley can still be displaced in its radial direction and in the radial direction of the hub component or the pulley 12 as a whole relative to the hub component.

[0044] For example, in the pre-assembly state, the belt 15 is mounted on the drive pulley by at least partially encircling the drive pulley. If, for example, the drive pulley, which in the pre-assembly state is arranged eccentrically to the hub component, is then displaced radially relative to the hub component, particularly such that the drive pulley is aligned coaxially with the hub component, the belt 15 is thereby tensioned and the drive pulley is moved into a final assembly position. In this final assembly position, in which the belt 15 is tensioned as described and the drive pulley is arranged coaxially with the hub component, the drive pulley is secured to the hub component, thus preventing undesired relative displacements between the drive pulley and the hub component in the radial direction of the pulley 12.For this purpose, for example, the drive disc is screwed to the hub component.

[0045] To make tensioning the belt 15 particularly easy, for example the drive pulley and with it the hub component are rotated 180 degrees relative to the motor housing 2 from the pre-assembly state, whereby the drive pulley is arranged coaxially to the hub component and the belt 15 is tensioned.

[0046] Fig. 8 and Fig. Figure 9 shows a second embodiment of the internal combustion engine 1. The second embodiment differs from the first embodiment in particular in that a further auxiliary unit in the form of a liquid pump 31 is provided. The liquid pump 31 is a hydraulic pump by means of which hydraulic fluid can be pumped, for example, to operate at least one hydraulically operated actuator, in particular a transmission of the motor vehicle. The liquid pump 31 is held on the bracket 20 and can be driven by the pulley 12. This means that the liquid pump 31 can be driven, or is driven, by the output shaft via the pulley 12, the belt 14, and the pulley 9.

[0047] Preferably, the fluid pump 31 (hydraulic pump) has an integrated coupling, which is preferably designed as a positive-locking coupling, for example as a jaw coupling. The fluid pump 31 has, for example, a third pumping element for pumping the hydraulic fluid, which can be driven by the pulley 12. The coupling can be switched between a coupled state and a disengaged state. In the coupled state, the third pumping element of the fluid pump 31 is connected to the pulley 12 via the coupling and can thus be driven by the pulley 12 via the coupling. In the disengaged state, however, the third pumping element is decoupled from the pulley 12 and can thus not be driven by the pulley 12 via the coupling, whereby the fluid pump 31 can be switched on and off as required. Fig. 8 and Fig.Figure 9 clearly shows that the liquid pump 31, due to its modular design described above, can be integrated particularly easily, cost-effectively, and in a space-saving manner, and can be advantageously driven via the auxiliary drive. This makes it possible, in particular, to implement a modular design in which the internal combustion engine 1 can be easily equipped with the liquid pump 31, or the liquid pump 31 can simply be omitted without affecting the design of the main or auxiliary drive. Furthermore, the liquid pump, also referred to as a hydraulic pump, can be driven without transverse forces via the auxiliary drive and, in particular, via the clutch. Reference symbol list 1 Internal combustion engine 2 Motor housings 3 cylinder head 4 cylinder head 5 fans 6 fan wheel 7 Coolant pump 8. Embracing instinct 9 Pulley 10 belts 11 Pulley 12 Pulley 13 Pulley 14 belts 15 belts 16 Wrap area 17 Wrapping area 18 Wrapping area 19 Wrapping area 20 console 21 screw 22nd wave 23 recording 24 support arm 25 Through opening 26 Passage opening 27 electric machine 28 Pulley 29 Air conditioning compressor 30 Pulley 31 Hydraulic pump

Claims

[1] Internal combustion engine (1) for a motor vehicle, comprising an output shaft, a fan (5), at least one auxiliary unit (7) different from the fan (5), and a wrapping drive (8) comprising at least one wrapping wheel (9) that can be driven by the output shaft and at least one wrapping means (10) that wraps around the wrapping wheel (9) and can be driven by the output shaft via the wrapping wheel (9), by means of which at least the auxiliary unit (7) can be driven by the output shaft, characterized by : - a second wrap wheel (12); - a third wrap wheel (13); - a second wrapping means (14) which wraps around the first wrapping wheel (9) and the second wrapping wheel (12), which can be driven by the output shaft via the second wrapping means (14) and the first wrapping wheel (9); and - a third wrapping means (15) which wraps around the second wrapping wheel (12) and the third wrapping wheel (13), so that the fan (5) can be driven by the second wrapping wheel (12) via the third wrapping wheel (13) and the third wrapping means (15). [2] Internal combustion engine (1) according to claim 1, characterized by , that a console (20) held on a housing element (2) of the internal combustion engine (1) is provided, on which the second wrapping wheel (12) and the third wrapping wheel (13) are rotatably held. [3] Internal combustion engine (1) according to claim 2, characterized by , that the console (20) has at least one support arm (24) on which the third wrapping wheel (13) is rotatably held, the support arm (24) penetrating a first through-opening (25) bounded by the second wrapping means (14) and a second through-opening (26) bounded by the third wrapping means (15). [4] Internal combustion engine (1) according to any one of the preceding claims, characterized by , that a second auxiliary unit (31) is provided, which is different from the auxiliary unit (7) and the fan (5) and which can be driven by the second wrap-around wheel (12). [5] Internal combustion engine (1) according to claim 4 in reference to claim 2 or 3, characterized by , that the second auxiliary unit (31) is held on the console (20). [6] Internal combustion engine (1) according to claim 4 or 5, characterized by , that the second auxiliary unit (31) is designed as a liquid pump (31). [7] Internal combustion engine (1) according to any one of the preceding claims, characterized by , that the second wrapping wheel (12) and / or the third wrapping wheel (13) has a turret clamping system for clamping the respective wrapping means (14, 15). [8] Internal combustion engine (1) according to any one of the preceding claims, characterized by , that the auxiliary unit (7) is designed as a coolant pump (7). [9] Internal combustion engine (1) according to any one of the preceding claims, characterized by , that a third auxiliary unit (27) is provided, which can be driven by the output shaft via the first wrapping means (10) and the first wrapping wheel (9).

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