DE102022001147B3 - Hybrid drive system for a motor vehicle and motor vehicle, in particular motor vehicle - Google Patents

Abstract

The invention relates to a hybrid drive system (10) for a motor vehicle, with an internal combustion engine (16) which has a drive shaft (21) via which first drive torques for driving the motor vehicle can be provided by the internal combustion engine (16), with an electric machine (22 ), which has a rotor (26) via which second drive torques for driving the motor vehicle can be provided by the electric machine (22), with an axle drive (30) which has an axle drive input wheel (34) via which the axle drive (30) can be driven, and with a transmission (44) which has a first sub-transmission (46) and a second sub-transmission (48), the first sub-transmission (46) having a first planetary gear set (50) with a first element (54), a second Element (56) and a third element (58) and a second planetary gear set (52) with a permanently non-rotatably connected to the second element (56), fourth element (62), a fifth element (64) and a sixth element (66) having.

Description

The invention relates to a hybrid drive system for a motor vehicle, in particular for a motor vehicle, according to the preamble of patent claim 1. The invention also relates to a motor vehicle with such a hybrid drive system.

From the U.S. 2015/0 283 894 A1 a hybrid drive system is known, in which an internal combustion engine and an electric machine are connected to a transmission with two sub-transmissions. A first of the sub-transmissions has two planetary gear sets. A second of the sub-transmissions has two spur gear stages and is upstream of the first sub-transmission with regard to a torque flow emanating from the internal combustion engine.

From the DE 10 2018 005 372 A1 a hybrid drive system is known in which two partial transmissions are also used. In this case, with regard to a torque flow emanating from an internal combustion engine, a planetary gear is connected upstream of a spur gear sub-gear. The spur gear is only connected to one of the shafts of the planetary gear.

The DE 10 2017 006 082 A1 discloses a hybrid drive device having an internal combustion engine and an electric machine having a rotor. A spur gear sub-gear connected downstream of a planetary gear with regard to a torque flow emanating from the internal combustion engine is connected to two different shafts of the planetary gear.

The object of the present invention is to create a hybrid drive system for a motor vehicle and a motor vehicle with such a hybrid drive system, so that a particularly advantageous drive can be implemented in a particularly space-saving manner.

This object is achieved by a hybrid drive system having the features of patent claim 1 and by a motor vehicle having the features of patent claim 14 . Advantageous configurations with expedient developments of the invention are specified in the remaining claims.

A first aspect of the invention relates to a hybrid drive system, also referred to as a hybrid drive device or hybrid drive device or designed as a hybrid drive device or hybrid drive device, for a motor vehicle, in particular for a motor vehicle. This means that the motor vehicle, designed in particular as a motor vehicle, particularly as a passenger car, has the hybrid drive system in its fully manufactured state and can be driven by means of the hybrid drive system. The hybrid drive system has an internal combustion engine, also referred to as an internal combustion engine or internal combustion engine, which is also simply referred to as a motor and has a drive shaft. For example, the internal combustion engine is designed as a reciprocating piston engine, so that in particular the drive shaft can be designed as a crankshaft. The internal combustion engine can provide first drive torques for driving the motor vehicle via the drive shaft. The first drive torques are first torques for driving the motor vehicle. The hybrid drive system also includes an electric machine that has a rotor. For example, the electrical machine has a stator, by means of which the rotor can be driven and thereby rotated about a machine axis of rotation relative to the stator. The electric machine can provide second drive torques for driving the motor vehicle via the rotor. The second driving torques are second torques for driving the motor vehicle. For example, in its completely manufactured state, the motor vehicle has at least or exactly two vehicle axles, also referred to simply as axles, one after the other in the longitudinal direction of the vehicle and thus arranged one behind the other. The respective axle has at least or exactly two vehicle wheels, also referred to simply as wheels, which are arranged on opposite sides of the motor vehicle, referred to simply as vehicle, in the vehicle transverse direction. The respective wheel is a ground contact element, via which the motor vehicle can be or is supported on a ground downwards in the vertical direction of the vehicle. If the motor vehicle is driven along the ground and is driven by the hybrid drive system while the motor vehicle is supported on the ground via the ground contact elements in the vehicle vertical direction, the ground contact elements roll, in particular directly, on the ground. For example, the hybrid drive system is assigned, in particular precisely, to one of the axles, so that the wheels of the axle to which the hybrid drive system is assigned can be driven by means of the hybrid drive system, for example. Thus, it is particularly conceivable that the internal combustion engine can drive via its drive shaft and the electric machine via its rotor the same wheels of the axle that is associated with the hybrid drive system. By driving the wheels, the motor vehicle can be propelled. The wheels that can be driven by means of the hybrid drive system, and therefore by means of the internal combustion engine and by means of the electric machine, are also referred to as drivable or driven wheels or referred to as drive wheels. When the wheels or the vehicle wheels are mentioned below, unless otherwise stated, this means the wheels of the axle that can be driven by means of the hybrid drive system and to which the hybrid drive system is assigned.

The hybrid drive system includes an axle drive that is assigned in particular to the axle that is assigned to the hybrid drive system. In particular, the wheels can be driven by the internal combustion engine and by the electric machine via the axle drive. In particular, the axle drive is a differential drive, also referred to simply as a differential, which in particular has the function, well known from the general state of the art, that a respective, third torque can be distributed to the wheels via the axle drive, so that the wheels can be driven via the axle drive by means of of the respective third torque can be driven. For example, the respective third torque results from the respective first drive torque and/or from the respective second drive torque. In particular, the axle drive allows the wheels to rotate at different speeds, for example when the motor vehicle is cornering, so that the wheel on the outside of the curve can rotate at a higher speed than the wheel on the inside of the curve, in particular while the wheels are being driven via the axle drive by means of the third torque or from the internal combustion engine and/or or can be driven or are driven by the electrical machine. The axle drive has an axle drive input gear, via which the axle drive can be driven, in particular in such a way that the respective third torque can be introduced into the axle drive or transmitted to the axle drive via the axle drive input wheel. The final drive input gear is a first gear of the hybrid drive system and is therefore also referred to as the final drive input gear. For example, the axle transmission input wheel can be designed as a crown wheel. The axle drive can be designed as a bevel gear differential or, for example, as a planetary gear differential.

The hybrid drive system also has a transmission, which is also referred to as the main transmission and is provided in particular in addition to the axle drive, which transmission has a first sub-transmission and a second sub-transmission. In particular, it is conceivable that the axle drive can be driven via the transmission by the internal combustion engine and by the electric machine, so that, for example, the transmission can provide the respective, third torque, or the transmission can, for example, provide a respective, fourth torque, from which, for example, the respective, third torque results. It is conceivable that the respective fourth torque results from the respective first drive torque and/or from the respective second drive torque.

The first partial transmission has a first planetary gear set, which is also simply referred to as the first planetary gear set. The first planetary gear set has a first sun gear, a first planet carrier, which is also referred to as the first carrier, and a first ring gear. The first sun gear, the first planet carrier and the first ring gear are also referred to as planetary gear set elements of the first planetary gear set, consequently the first sun gear, the first planet carrier and the first ring gear are planetary gear set elements of the first planetary gear set. A first of the planetary gearset members of the first planetary gear set is also referred to as the first member, a second of the planetary gearset members of the first planetary gear set is also referred to as the second member, and the third planetary gearset member of the first planetary gear set is also referred to as the third member.

The first partial transmission also has a second planetary gear set, which is provided in particular in addition to the first planetary gear set and is also simply referred to as the second planetary gear set. In particular, the second planetary gear set has a second sun gear, a second planet carrier, which is also referred to as a second carrier, and a second ring gear. The second sun gear, the second planet carrier and the second ring gear are also referred to as transmission elements of the second planetary gear set or are transmission elements of the second planetary gear set. A first of the gear elements of the second planetary gear set is also referred to as the fourth element, a second of the gear elements of the second planetary gear set is also referred to as the fifth element, and the third gear element of the second planetary gear set is also referred to as the sixth element of the second planetary gear set. When the elements are mentioned below, unless otherwise stated, these include the six elements of the planetary gear sets mentioned above, namely the first element, the second element, the third element, the fourth element, the fifth element and understand the sixth element.

In particular, it is conceivable for the hybrid drive system to have a housing, it being conceivable for the first planetary gear set and/or the second planetary gear set to be arranged at least partially, in particular at least predominantly and thus at least more than half or completely, in the housing is. For example, when the respective planet wheel set element is not rotatably connected to the housing, the respective planetary gear set element can be rotated about a first planetary gear set axis of rotation relative to the housing, in particular by driving the first planetary gear set. It is also conceivable that, particularly when the respective transmission element is not connected to the housing in a torque-proof manner, the respective transmission element can be rotated about a second planetary gear set axis of rotation relative to the housing, in particular by driving the second planetary gear set. In particular, it can be provided that the planetary gear sets are arranged coaxially with one another, so that the planetary gear set axes of rotation coincide.

In the hybrid drive system, the second element is permanently non-rotatably connected to the fourth element or vice versa.

The second partial transmission has a first spur gear stage, a second spur gear stage provided in particular in addition to the first spur gear stage, and an output shaft provided in particular in addition to the drive shaft. The first spur gear stage has a first output gear wheel which is arranged coaxially to the output shaft and which can be connected, for example, in particular permanently, in a torque-proof manner to the output shaft. For example, the first output gear is arranged on the output shaft. The first spur gear stage also has a first input gear which, in particular permanently, meshes with the first output gear. In addition, the first input gear is non-rotatably connected or connectable to the second element. The first output gear is a second gear of the hybrid drive system, and the first input gear is a third gear of the hybrid drive system, for example the second gear and the third gear can be designed as spur gears. Since the first output gear wheel and the second input gear wheel mesh with one another, in particular permanently, the first output gear wheel and the first input gear wheel, in particular permanently, mesh with one another. The feature that two gears, such as the first output gear and the first input gear, permanently mesh with one another, and are therefore permanently in mesh with one another, means that the permanently meshing gears do not move between a meshing position, in which the gears mesh with one another, and a loose position are movable relative to each other, in which the gears do not mesh with each other, but the gears permanently meshing with each other are permanently, that is always in engagement with each other.

The second spur gear has a second output gear, which is arranged coaxially to the output shaft. For example, the second output gear wheel is connected to the output shaft in a torque-proof manner, in particular permanently. In particular, it is conceivable that the second output gear wheel is arranged on the output shaft. The second spur gear stage also has a second input gear which, in particular permanently, meshes with the second output gear. The second input gear is non-rotatably connected or connectable to the sixth element.

In particular, the second output gear is a fourth gear and the second input gear is a fifth gear of the hybrid drive system. In particular, for example, the fourth gear and the fifth gear of the hybrid drive system can be designed as spur gears.

Furthermore, it is provided that the rotor of the electric machine is coupled or can be coupled in a torque-transmitting manner to one of the elements in such a way that the respective second drive torque provided or that can be made available by the electric machine via the rotor is applied to the one torque-transmittingly coupled to the rotor or element that can be coupled can be introduced into the transmission, thus the respective second drive torque provided or that can be provided by the electric machine via the rotor can be transferred from the rotor to the one element that is coupled or can be coupled in a torque-transmitting manner to the rotor and thus via the one element that is torque-transmitting to the Rotor coupled or coupled element can be introduced into the transmission, in particular to thereby drive the transmission.

The hybrid drive system also includes an output gear, which is, for example, a sixth gear of the hybrid drive system. The output gear wheel is permanently non-rotatably connected to the output shaft. It is preferably provided that the output gear wheel is arranged coaxially to the first output gear wheel and preferably also coaxially to the second output gear wheel. Furthermore, it is conceivable that the second output gear is arranged coaxially to the first output gear. The output gear constantly meshes with the final drive input gear of the final drive. In particular, it is conceivable that the output gear is designed as a bevel gear.

In the context of the present disclosure, the feature that two components, such as the output gear wheel and the output shaft or, for example, the second element and the fourth element, are connected to one another in a rotationally fixed manner is to be understood as meaning that the components are rotationally fixed to one another connected components are arranged coaxially to one another and, in particular when the components are driven, rotate together or simultaneously about a component axis of rotation common to the components, such as the first planetary gear set axis of rotation or the second planetary gear set axis of rotation, at the same angular velocity, in particular relative to the housing. The feature that two components such as the rotor and one element are coupled or connected to one another in a torque-transmitting manner is to be understood as meaning that the components are coupled or connected to one another in such a way that torque can be transmitted between the components, and when the Components are connected to one another in a torque-proof manner, the components are also connected to one another in a torque-transmitting manner.

The feature that two components are permanently connected to each other in a torque-transmitting manner means that a switching element is not provided, for example, which can be switched between a coupling state connecting the components to one another in a torque-transmitting manner and a decoupling state in which no torques can be transmitted between the components , but the components are always or always and thus permanently torque-transmitting, that is connected to each other in such a way that a torque can be transmitted between the components. Thus, for example, one of the components can be driven by the respective other component or vice versa. In particular, the feature that two components such as the second element and the fourth element are permanently connected to one another in a rotationally fixed manner means that a switching element is not provided, which can be switched between a coupled state connecting the components with one another in a rotationally fixed manner and a decoupling state. in which the components are decoupled from one another and can be rotated relative to one another, in particular about the component axis of rotation, so that, for example, no torque can be transmitted between the components, but the components are always or always, therefore permanently, connected or coupled to one another in a torque-proof manner. Thus, within the scope of the present disclosure, a non-rotatable connection of two elements, in particular rotatably mounted elements, means that these two elements are arranged coaxially to one another and are connected to one another in such a way that they rotate at the same angular velocity. Furthermore, the feature that two components, such as the rotor of the electric machine and one element, can be coupled or connected to one another in a torque-transmitting manner, in particular in a torque-proof manner, means that the components are assigned a switching element, also known as a switching element, which switches between a coupling state , in which the components are connected to one another in a torque-transmitting manner, in particular non-rotatably, by means of the switching element, and a decoupling state can be switched over, in which the components are decoupled from one another, so that the components can rotate relative to one another, in particular about the component axis of rotation, and so that in particular no torques are generated between the Components can be transferred.

The one element mentioned above that is coupled or can be coupled in a torque-transmitting manner to the rotor of the electric machine is also referred to below as the first connecting element, so that hereinafter the first connecting element can be clearly referred to if this should be necessary.

The hybrid drive system has a first switching element, which is designed to connect the drive shaft of the internal combustion engine to one of the elements in a torque-proof manner. In other words, the drive shaft can be connected to one of the elements in a torque-proof manner by means of the first shifting element. The one element that can be connected non-rotatably to the drive shaft of the internal combustion engine, which is designed as a crankshaft, for example, by means of the first shifting element, is also referred to below as the second connecting element, in order to be able to clearly refer to the second connecting element in the following, if this should be necessary. The second connection element can be the first connection element, or preferably the second connection element is a different element than the first connection element. In particular, the first switching element can be switched between a first coupling state and a first decoupling state. In the first coupling state, the drive shaft and the second connecting element are connected to one another in a rotationally fixed manner by means of the first shifting element, so that the drive shaft and the second connecting element move together or simultaneously, i.e. at the same angular velocity, in particular about one of the axes of rotation of the planetary gear set and/or relative to the housing Can rotate or rotate, especially when, for example, the drive shaft drives the second connecting element. In the first decoupling state, the first shifting element allows relative rotations between the drive shaft and the second connecting element, in particular about one of the planetary gear set axes of rotation. For example, the first switching element, in particular translatory and / or relative to the Housing, movable between at least one first coupling position effecting the first coupling state and at least one first decoupling position effecting the first decoupling state.

The hybrid drive system also includes a second switching element, which is designed to connect the third element to the fifth element in a rotationally fixed manner. In other words, the third element can be connected to the fifth element in a torque-proof manner by means of the second switching element. Thus, for example, the second switching element can be switched over between a second coupling state and a second decoupling state. In the second coupling state, the third and the fifth element are non-rotatably connected to one another by means of the second switching element, so that the third element and the fifth element move together or simultaneously, i.e. at the same angular velocity, in particular about the first planetary gear set axis of rotation and the second planetary gear set axis of rotation and/or or relative to the housing, rotate or can rotate, in particular when the first sub-transmission is driven. In the second decoupling state, the second shifting element allows relative rotations between the third element and the fifth element, in particular about the first and/or second axis of rotation of the planetary gear set, so that in the second decoupling state the third element and the fifth element can rotate relative to one another, in particular about the first or second planetary gear set axis of rotation. For example, the second switching element can be moved, in particular translationally and/or relative to the housing, between at least one second coupling position causing the second coupling state and at least one second uncoupling position causing the second uncoupling state.

In order to be able to achieve a particularly advantageous drivability in a particularly space-saving manner, i.e. a particularly compact and therefore space-saving design of the hybrid drive system, it is provided according to the invention that the second spur gear stage, viewed in an axial direction, is on a side of the first spur gear stage that faces away from the first spur gear stage Sub-transmission is arranged. In other words, it is provided according to the invention that the second spur gear stage is arranged on a side of the first partial transmission that faces away from the first spur gear stage in the axial direction.

The terms "axial" and "coaxial" refer to the respective planetary gear set axis of rotation, so that the aforementioned axial direction coincides with the respective planetary gear set axis of rotation. For example, with regard to the output shaft and the respective output gear wheel, a coaxial arrangement of the respective output gear wheel to the output shaft means that the output shaft and the respective output gear wheel can be rotated about a common element axis of rotation, in particular relative to the housing, very particularly simultaneously. In the context of the present disclosure, ordinal number words such as "first", "first", "second", "second" etc. are also not necessarily used to indicate or imply a number or quantity, but rather to unambiguously refer to terms to be able to reference to which the ordinal number words are assigned or to which the ordinal number words relate.

In a particularly advantageous embodiment of the invention, the first switching element is designed to connect the drive shaft to the fifth element in a rotationally fixed manner. In other words, the second connecting element is preferably the fifth element, so that it is preferably provided that the drive shaft can be connected to the fifth element in a torque-proof manner by means of the first shifting element. As a result, a particularly advantageous shiftability and thus a particularly advantageous multi-speed and thus drivability can be realized.

In a particularly advantageous embodiment of the invention, it is provided that the rotor of the electrical machine is permanently coupled to the first element in such a way that the respective second drive torque provided or that can be provided by the electrical machine via the rotor is transmitted to the first element in the transmission can be initiated. In other words, it is preferably provided that the first connecting element is the first element of the first planetary gear set. As a result, a particularly advantageous translation and thus a particularly advantageous drivability can be achieved in a way that is economical in terms of installation space.

In order to be able to keep the space requirement, the costs and the weight low, it is provided in a further embodiment of the invention that a total of exactly two planetary gear sets are provided, namely the first planetary gear set and the second planetary gear set. In other words, it is preferably provided that the hybrid drive system as a whole has precisely, ie exclusively, two planetary gear sets, namely the first planetary gear set and the second planetary gear set.

Provision is very preferably made for the first element to be the first sun gear, the second element to be the first planet carrier and the third element to be the first ring gear. Alternatively or additionally, it is preferably provided that the fourth element, the second sun gear, the fifth element of second planet carrier and the sixth element is the third ring gear.

In a further, particularly advantageous embodiment of the invention, the hybrid drive system has a third switching element which is designed to connect the third element to the housing of the hybrid drive system in a torque-proof manner. This means that the third switching element can be connected to the housing in a torque-proof manner by means of the third switching element. The third switching element can thus be switched between a third coupling state and a third decoupling state, for example. In the third coupling state, the third element is non-rotatably connected to the housing by means of the third switching element, so that relative rotations between the third element and the housing occurring at least about the first planetary gear set axis of rotation are prevented. In the third decoupling state, the third shifting element allows relative rotations between the third element and the housing, in particular about the first planetary gear set axis of rotation. For example, the third switching element can be moved, in particular translationally and/or relative to the housing, between at least one third coupling position causing the third coupling state and at least one third uncoupling position causing the third uncoupling state. By using the third shifting element, a particularly advantageous shiftability and thus a particularly advantageous multi-speed capability of the hybrid drive can be implemented, so that a particularly advantageous drive can be produced.

A further embodiment is characterized by a fourth switching element, which is designed to connect the drive shaft to the first element in a rotationally fixed manner. In other words, it is preferably provided that the drive shaft can be connected to the first element in a torque-proof manner by means of the fourth shifting element. For example, the fourth switching element can be switched over between a fourth coupling state and a fourth decoupling state. In the fourth coupling state, the drive shaft is non-rotatably connected to the first element by means of the fourth shifting element, so that the first element and the drive shaft can rotate or rotate in particular about the first planetary gear set axis of rotation together or simultaneously and preferably relative to the housing, in particular when the drive shaft drives the first element. In the fourth decoupling state, the fourth shifting element permits relative rotations between the drive shaft and the first element, in particular about the first planetary gear set axis of rotation. For example, the drive shaft is thus arranged coaxially to the first planetary gear set and/or to the second planetary gear set. For example, the fourth switching element can be moved, in particular translationally and/or relative to the housing, between at least one fourth coupling position causing the fourth coupling state and at least one fourth uncoupling position causing the fourth uncoupling state.

In order to be able to keep the installation space requirement of the hybrid drive system particularly small, particularly in the axial direction, it is provided in a further embodiment of the invention that the fourth switching element is arranged so that it overlaps axially with respect to the electric machine.

In particular, the feature “axially overlapping” means the following: Two elements such as the fourth switching element and the electric machine, in particular the rotor, are arranged in an axially overlapping manner if they are arranged in areas with the same axial coordinates. Thus, with regard to two axially overlapping elements, there is at least one radially arranged straight line, i.e. running in the radial direction and thus perpendicular to the respective planetary gear set axis of rotation, which penetrates or intersects both the one and the other of the axially overlapping elements.

In order to be able to realize a particularly advantageous multi-speed and thus a particularly advantageous driveability and a particularly advantageous drive, the hybrid drive system comprises a fifth shifting element in a further embodiment, which is designed to non-rotatably connect the sixth element to the second input gear. In other words, the sixth element can be connected in a torque-proof manner to the second input gear wheel by means of the fifth shifting element. Thus, for example, the fifth switching element can be switched over between a fifth coupling state and a fifth decoupling state. In the fifth coupling state, the sixth element is non-rotatably connected to the second input gear by means of the fifth switching element, so that the sixth element and the second input gear can rotate or rotate simultaneously or jointly, in particular about the second planetary gear set axis of rotation and preferably relative to the housing, in particular when the second input gear drives the sixth element or vice versa. In the fifth decoupling state, the fifth shifting element allows relative rotations between the sixth element and the second input gear wheel, in particular about the second planetary gear set axis of rotation. Thus, it is further preferably provided that the sixth element and the second input gear are arranged coaxially to one another. For example, the fifth Switching element, in particular translatory and/or movable relative to the housing, between at least one fifth coupling position causing the fifth coupling state and at least one fifth uncoupling position causing the fifth uncoupling state.

In a further, particularly advantageous embodiment of the invention, the hybrid drive system has a sixth shifting element, which is designed to connect the first output gear wheel to the output shaft in a rotationally fixed manner. In other words, the first output gear wheel can be connected to the output shaft in a torque-proof manner by means of the sixth shifting element. For this purpose, for example, the sixth switching element can be switched over between a sixth decoupling state and a sixth coupling state. In the sixth coupling state, the first output gear is non-rotatably connected to the output shaft by means of the sixth shifting element. In the sixth decoupling state, the sixth shifting element permits relative rotations between the first output gear wheel and the output shaft, these relative rotations taking place, for example, about an output shaft axis of rotation about which the output shaft can be rotated in particular relative to the housing. For example, the sixth switching element can be moved, in particular translationally and/or relative to the housing, between at least one sixth coupling position causing the sixth coupling state and at least one sixth uncoupling position causing the sixth uncoupling state. As a result, a particularly advantageous shiftability and multiple speeds of the hybrid drive system can be achieved.

In order to be able to implement a particularly compact design of the hybrid drive system, it is provided in a further embodiment of the invention that viewed in an axial direction and thus along the respective planetary gear set axis of rotation, the first shifting element, the second shifting element, the third shifting element, the fourth shifting element, the fifth The switching element and the sixth switching element are arranged one after the other in the following order, ie one after the other: the first switching element - the fourth switching element - the fifth switching element - the sixth switching element - the third switching element - the second switching element. It is therefore preferably provided that, viewed in the axial direction and thus along the respective axis of rotation of the planetary gearset, the fourth shifting element is attached to the first shifting element, the fifth shifting element to the fourth shifting element, the sixth shifting element to the fifth shifting element, the third shifting element to the sixth shifting element and the second switching element connects to the third switching element.

In order to be able to present a particularly compact design of the hybrid drive system, it is provided in a further embodiment of the invention that viewed in the axial direction and thus along the respective planetary gear set axis of rotation, a rotor wheel of the electric machine, the first spur gear stage, the first partial transmission and the second spur gear stage in the The order mentioned, that is to say they are arranged one after the other in the following order: The rotor wheel - the first spur gear stage - the first sub-transmission - the second spur gear stage. Thus, it is preferably provided that viewed in the axial direction and thus along the respective planetary gear set axis of rotation, the first spur gear stage is connected to the rotor wheel, the first partial transmission to the first spur gear stage and the second spur gear stage to the first partial transmission. In particular, the rotor wheel is a seventh gear wheel of the hybrid drive system, it being possible for the seventh gear wheel to be a spur gear. In particular, it is conceivable that the rotor is coupled or can be coupled to the first connecting element in a torque-transmitting manner by means of the rotor wheel, that is to say via the rotor wheel. In particular, it is conceivable that the rotor is coupled via the rotor wheel, in particular permanently, to the first connecting element in a torque-transmitting manner. For this purpose, for example, an eighth gear wheel, designed in particular as a spur gear, can be or is connected to the first connecting element in a torque-transmitting manner, in particular in a rotationally fixed manner. In particular, it is conceivable that the eighth gear wheel is connected to the first connecting element in a torque-proof manner, in particular permanently. It is particularly conceivable that the eighth gearwheel meshes with the rotor wheel, in particular permanently, and is therefore, in particular permanently, in engagement with the rotor wheel. It is thus conceivable that the rotor wheel and the eighth gear wheel form a third spur gear stage, which is provided in particular in addition to the first spur gear stage and in addition to the second spur gear stage. In particular, it is conceivable that the eighth gear wheel is arranged coaxially to the first connecting element, so that in particular when the eighth gear wheel is not connected to the housing in a rotationally fixed manner, the eighth gear wheel rotates around the first planetary gear set axis of rotation and/or the second planetary gear set axis of rotation relative to the housing is rotatable.

In order to be able to realize a particularly space-saving construction of the hybrid drive system, it is provided in a further embodiment of the invention that the drive shaft is arranged coaxially to the first partial transmission and thus coaxially to the first planetary gear set and preferably also coaxially to the second planetary gear set. In this case, the driven gear wheel is preferably axial, that is to say viewed in the axial direction and thus along the respective planetary gear set axis of rotation between the internal combustion engine and the first part gear arranged. In other words, the output gear wheel is preferably arranged in a plane which runs perpendicularly to the axial direction and thus perpendicularly to the respective planetary gear set axis of rotation, the plane being arranged between the internal combustion engine and the first partial transmission when viewed in the axial direction and thus along the respective planetary gear set axis of rotation. In order to be able to realize a particularly space-saving design of the hybrid drive system, particularly in the axial direction, it is provided in a further embodiment of the invention that the first switching element is arranged so that it overlaps axially with respect to the electrical machine, in particular the rotor and/or the stator.

A second aspect of the invention relates to a motor vehicle, also referred to simply as a vehicle, which can be embodied, for example, as a motor vehicle, in particular as a passenger car. The motor vehicle has a hybrid drive system according to the first aspect of the invention. The motor vehicle can be driven by the hybrid drive system. Advantages and advantageous configurations of the first aspect of the invention are to be regarded as advantages and advantageous configurations of the second aspect of the invention and vice versa.

In particular, the invention enables the hybrid drive system or the transmission to be configured as a multi-speed transmission, in particular based on coupled planetary gear sets in the form of the first planetary gear set and the second planetary gear set, in particular in an axially parallel design. The invention makes it possible in particular to be able to keep the power loss particularly low. For example, up to 6 hybrid or combustion engine-based priority gears and one hybrid reverse gear can be implemented. In addition, for example, at least or exactly two electric gears and various stepless driving ranges can be implemented. In addition, the invention enables a particularly large spread to be implemented. The planetary gear sets are preferably designed as simple planetary gear sets. At least one of the shifting elements can be designed as a positive-locking shifting element, in particular as a claw clutch, in particular with or without a synchronizing unit, as a result of which losses can be kept particularly low. The electric machine can be arranged coaxially to the planetary gear sets. Furthermore, an axis-parallel arrangement of the electrical machine is conceivable. With the coaxial arrangement of the electric machine, the machine axis of rotation coincides with the respective planetary gear set axis of rotation. In the paraxial, the machine axis of rotation runs parallel to the respective planetary gear set axis of rotation, the machine axis of rotation being spaced from the respective planetary gear set axis of rotation. Other form-fit shifting elements, in particular claw shifting elements, are conceivable, as a result of which losses can be kept particularly low. The invention also makes it possible to achieve advantageous gearing efficiencies.

Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing. The features and combinations of features mentioned above in the description and the features and combinations of features mentioned below in the description of the figures and/or shown alone in the figures can be used not only in the combination specified in each case, but also in other combinations or on their own, without going beyond the scope of the leave invention.

• 1 eine schematische Darstellung einer ersten Ausführungsform eines Hybridantriebssystems für ein Kraftfahrzeug;
• 2 eine schematische Darstellung einer zweiten Ausführungsform des Hybridantriebssystems; und
• 3 eine schematische Darstellung einer dritten Ausführungsform des Hybridantriebssystems.

The drawing shows in:

• 1 a schematic representation of a first embodiment of a hybrid drive system for a motor vehicle;
• 2 a schematic representation of a second embodiment of the hybrid drive system; and
• 3 a schematic representation of a third embodiment of the hybrid drive system.

Elements that are the same or have the same function are provided with the same reference symbols in the figures.

1 shows a first embodiment of a hybrid drive system 10 for a motor vehicle, also referred to as a vehicle, in a schematic representation. The motor vehicle is preferably designed as a motor vehicle. The motor vehicle has, for example, at least or exactly two vehicle axles arranged one behind the other in the longitudinal direction of the vehicle. The respective vehicle axle is also referred to simply as an axle and has at least or exactly two vehicle wheels, the vehicle wheels being ground contact elements of the motor vehicle. The hybrid drive system 10 is assigned, in particular precisely, to one of the axles, so that the vehicle wheels of the vehicle axle to which the hybrid drive system 10 is assigned can be driven by means of the hybrid drive system 10 . The vehicle wheels of the vehicle axle, which can be driven by means of hybrid drive system 10 and to which hybrid drive system 10 is assigned, are in 1 shown particularly schematically and denoted by 12 and 14. The hybrid drive system 10 has a combustion motor 16, which is also referred to as an internal combustion engine, motor or internal combustion engine. The internal combustion engine has a cylinder housing 18 , also referred to as an engine block, which has a plurality of cylinders 20 . In a fired operation of the internal combustion engine, combustion processes take place in the cylinders 20 . For example, the internal combustion engine 16 is designed as a reciprocating piston engine. The internal combustion engine 16 has a drive shaft 21 embodied as a crankshaft, for example, which can be rotated about a drive shaft axis of rotation relative to the cylinder housing 18 . The internal combustion engine 16 can provide first drive torques for driving the vehicle wheels 12 and 14 and thus for driving the motor vehicle via the drive shaft 21 . The hybrid drive system 10 also includes an electric machine 22 which has a stator 24 and a rotor 26 . The rotor 26 can be driven by the stator 24 and can therefore be rotated about a machine axis of rotation relative to a stator 24 . The hybrid propulsion system 10 also includes an in 1 housing 28 shown particularly schematically, the drive shaft 21 being rotatable about the drive shaft axis of rotation and the rotor 26 being rotatable about the machine axis of rotation relative to the housing 28 . The electric machine 22 can provide second drive torques via the rotor 26 for driving the vehicle wheels 12 and 14 and thus for driving the motor vehicle. The hybrid drive system 10 also has an axle drive 30 designed as a differential gear and also referred to simply as a differential, via which the vehicle wheels 12 and 14 can be driven by the electric machine 22 and by the internal combustion engine 16 . In the first embodiment, the transaxle 30 is formed, for example, as a bevel gear differential. The axle drive 30 has an axle drive housing 32, which is designed here, for example, as a so-called differential carrier. In addition, the axle drive 30 includes an axle drive input wheel 34 which is connected to the axle drive housing 32 in a torque-proof manner, in particular permanently. Thus, the transaxle housing 32 and the transaxle input gear 34 are rotatable about a transaxle axis of rotation relative to the housing 28 . As in 1 illustrated by arrows 36, the axle drive 30 can divide or transmit a respective third drive torque resulting from the respective first drive torque and/or from the respective second drive torque, which is also referred to as the third torque, to the vehicle wheels 12 and 14, whereby the vehicle wheels 12 and 14 are drivable. In the present case, the axle drive 30 has differential wheels 38 embodied as bevel gears, which can be rotated together with the axle drive housing 32 about the axle drive axis of rotation relative to the housing 28 . In addition, the differential gears 38 can rotate about a particular common differential gear axis of rotation, which runs perpendicular to the axis of rotation of the axle drive. The differential gears 38 mesh, in particular permanently, with side gears 40 of the axle drive 30. The respective differential gear 38 can be rotated relative to the axle drive housing 32 about the differential gear axis of rotation, which runs perpendicular to the axle drive axis of rotation. Each side gear 40 is rotatable about the transaxle axis of rotation relative to the housing 28 and also relative to the transaxle housing 32 . The respective side wheel 40 is connected to a respective side shaft 42, in particular permanently, in a torque-proof manner, with the respective vehicle wheel 12, 14 being able to be driven by the respective side shaft 42. In particular, the side gears 40 can be designed as bevel gears. The differential gears 38 and the side gears 40 are gears which mesh with one another, in particular permanently.

The hybrid drive system 10 also includes a transmission 44 , also referred to as the main transmission, which has a first sub-transmission 46 and a second sub-transmission 48 . The first sub-transmission 46 has a first planetary gear set 50 and a second planetary gear set 52, which in the present case are arranged coaxially with one another. The first planetary gear set 50 has a first element 54 in the form of a first sun gear, a second element 56 in the form of a first planet carrier, which is also referred to as a first carrier, and a third element 58 in the form of a first ring gear. In addition, the first planetary gearset 50 has first planetary gears 60 , which are rotatably mounted on the first planetary carrier 56 and simultaneously mesh both with the first sun gear 54 and with the first ring gear 58 . The second planetary gear set 52 includes a fourth member 62 in the form of a second sun gear, a fifth member 64 in the form of a second planet carrier, and a sixth member 66 in the form of a second ring gear. In addition, the second planetary gearset 52 has second planetary gears 68 , which are rotatably mounted on the planet carrier 64 here and simultaneously mesh both with the second sun gear 62 and with the ring gear 66 . In the first embodiment, the first sun gear is the first element 54, the first planet carrier is the second element 56, and the first ring gear is the third element 58. Also, the second sun gear is the fourth element 62, the second planet carrier is the fifth element 64, and the second ring gear the sixth element 66. The second element (first planet carrier) 56 is permanently non-rotatably connected to the fourth element (second sun gear) 62.

The second partial transmission 48 has a first spur gear stage 70 . In addition, the second sub-transmission 48 includes an output shaft 72, which in particular special about an output shaft axis of rotation relative to the housing 28 is rotatable. In particular, when the respective element is not connected to the housing 28 in a rotationally fixed manner, the respective element is rotatable about a planetary gear set axis of rotation relative to the housing 28 . The planetary gear set axis of rotation is a planetary gear set axis of rotation common to the planetary gear sets 50 and 52 since the planetary gear sets 50 and 52 are arranged coaxially with one another. In the first embodiment, the internal combustion engine 16 or the drive shaft 21 is arranged coaxially to the planetary gear sets 50 and 52, so that the drive shaft axis of rotation coincides with the planetary gear set axis of rotation. The output shaft 72 is arranged axially parallel to the planetary gear sets 50 and 52 and also axially parallel to the input shaft 21, so that the output shaft axis of rotation runs parallel to the planetary gear set axis of rotation and parallel to the input shaft axis of rotation and is spaced from the planetary gear set axis of rotation and the input shaft axis of rotation. The electric machine 22, i.e. its rotor 26, is arranged axially parallel to the output shaft 72, axially parallel to the planetary gear sets 50 and 52 and axially parallel to the internal combustion engine 16, so that the machine axis of rotation runs parallel to the output shaft axis of rotation, parallel to the planetary gear set axis of rotation and parallel to the input shaft axis of rotation and from the output shaft axis of rotation , is spaced from the planetary gear set axis of rotation and from the input shaft axis of rotation. In the present case, the axis of rotation of the axle transmission also runs parallel to the axis of rotation of the machine, parallel to the axis of rotation of the output shaft, parallel to the axis of rotation of the planetary gearset and parallel to the axis of rotation of the input shaft and is spaced apart from these, so that the axle transmission 30 is axis-parallel to the output shaft 72, to the electric machine 22, to the internal combustion engine 16 or to the drive shaft 21 and to the Planetary gear sets 50 and 52 is arranged.

The first spur gear stage 70 has a first output gear 74 which is arranged coaxially to the output shaft 72 . In the first embodiment, the output gear wheel 74 is connected to the output shaft 72 in a torque-proof manner, in particular permanently. Furthermore, it is conceivable that the output gear wheel 74 is arranged on the output shaft 72 . The first spur gear stage 70 also includes an input gear 76 which, in particular permanently, meshes with the first output gear 74 . In the first embodiment, the first input gear 76 is non-rotatably connected, specifically permanently, to the first member (first sun gear 54).

The second partial transmission 48 also includes a second spur gear stage 86 which has a second output gear 88 and a second input gear 90 . The output gear 88 is arranged coaxially with the output shaft 72 . In the first embodiment, the output gear 88 is non-rotatably connected to the output shaft 72, in particular permanently. In particular, the output gear 88 can be arranged on the output shaft 72 . The second input gear 90 meshes permanently with the output gear 88. The second input gear 90 is non-rotatably connected to the sixth element (ring gear 66).

In the first embodiment, the rotor 26 is permanently coupled in a torque-transmitting manner to the first element (sun gear 54) in such a way that the respective second drive torque provided or that can be provided by the electric machine 22 via its rotor 26 or a torque resulting therefrom on the first element ( Sun gear 54), that is, via the sun gear 54 can be introduced into the transmission 44. The hybrid drive system 10 also includes an output gear 78 which is permanently non-rotatably connected to the output shaft 72 . The output gear wheel 78 meshes permanently with the axle transmission input wheel 34.

The hybrid drive system 10 includes a first switching element 80, by means of which the drive shaft 21 of the internal combustion engine 16 is non-rotatably connected to one of the elements. The one element that can be connected in a rotationally fixed manner to the drive shaft 21 by means of the first shifting element 80 is also referred to as a connecting element and is presently the fifth element (second planetary carrier) 64, so that in the first embodiment the second planetary carrier is rotationally fixed to the drive shaft 21 by means of the first shifting element 80 is connectable. The hybrid drive system 10 also includes a second switching element 82, by means of which the third element (first ring gear) 58 is non-rotatably connected to the fifth element (second planetary carrier) 64.

In order to be able to achieve particularly advantageous drivability in a particularly space-saving manner, the second spur gear stage 86 is arranged on a side S of the first partial transmission 46, in particular of the second planetary gear set 52, facing away from the first spur gear stage 70 when viewed in the axial direction. In other words, the second spur gear stage 86 is arranged on the side S of the partial transmission 46, in particular of the second planetary gear set 52, that faces away from the first spur gear stage 70 or faces the way in the axial direction of the respective planetary gear set 50, 52 and thus viewed along the axis of rotation of the planetary gear set. It can be seen that the hybrid drive system 10 has a total of exactly two planetary gear sets, namely the first planetary gear set 50 and the second planetary gear set 52.

The hybrid drive system 10 also includes a third switching element 84, by means of which the third element (first ring gear) 58 can be connected to the housing 28 in a torque-proof manner. Furthermore, the hybrid drive system 10 includes a fourth switching element 92, by means of which the drive shaft 21 is non-rotatably connected to the first element (first sun gear) 54. In order to be able to keep the installation space requirement of the hybrid drive system 10 particularly low, particularly in the axial direction of the respective planetary gearset 50, 52 and thus viewed along the axis of rotation of the planetary gearset, provision is made for the fourth shifting element 92 to be arranged so that it overlaps axially with respect to the electric machine 22.

The hybrid drive system 10 also includes a fifth switching element 94, by means of which the sixth element (second ring gear) 66 can be connected in a rotationally fixed manner to the second input gear wheel 90. A sixth switching element 96 is also provided, by means of which the first output gear wheel 74 can be connected to the output shaft 72 in a rotationally fixed manner. The output gear 74 is arranged on the output shaft 72, for example. In particular, the output gear 74 is arranged coaxially with the output shaft 72 .

In the first embodiment, the shifting elements 80, 82, 84, 92, 94 and 96 are arranged in the following sequence in the axial direction and thus viewed along the axis of rotation of the planetary gear set, i.e. one after the other: the first shifting element 80 - the fourth shifting element 92 - the sixth shifting element 96 - the third switching element 84 - the second switching element 82 - the fifth switching element 94.

In principle, it is conceivable that at least one of the shifting elements 80, 82, 84, 92, 94 and 96 is designed as a positive shifting element, in particular as a claw clutch. In the first embodiment, the shifting elements 80, 82, 84, 92, 94 and 96 are designed as frictional shifting elements, in particular as a friction clutch and very particularly as a multi-plate clutch.

In the embodiment not shown in the figures, shifting element 92 can be designed as a positive shifting element, in particular as a claw clutch, for example, while the other shifting elements 80, 82, 84, 92, 94 and 96 can be designed as frictional shifting elements.

2 shows a second embodiment of the hybrid drive system 10. In the second embodiment, the switching elements 80, 82, 84, 92, 94 and 96 viewed in the axial direction and thus along the axis of rotation of the planetary gear set are arranged in the following order one after the other, i.e. consecutively: The fourth switching element 92 - the first shifting element 80 - the fifth shifting element 94 - the second shifting element 82 - the third shifting element 84 - the sixth shifting element 96. While in the first embodiment, the electric machine 22 and the internal combustion engine 16 on the same, facing away from the second planetary gear set 52 in the axial direction Side of the first planetary gear set 50 are arranged, it is provided in the second embodiment that the planetary gear sets 50 and 52 are arranged in the axial direction between the internal combustion engine 16 and the electric machine 22, so that the internal combustion engine 16 viewed in the axial direction on one side of the partial transmission 46 and the electric machine 22 are arranged on a second side of the partial transmission 46 facing away from the first side in the axial direction.

In the first embodiment, the rotor 26 has a toothed wheel referred to as a rotor wheel 98 which, in particular permanently, meshes with a corresponding, further toothed wheel 100 . The gear wheel 100 can be connected or is connected to the first element (first sun gear) 54 in a torque-transmitting manner, in particular in a torque-proof manner. In the first embodiment, the gear wheel 100 is non-rotatably connected to the first element 54, in particular permanently.

In the first embodiment, viewed in the axial direction and thus along the axis of rotation of the planetary gear set, the rotor wheel 98, the first spur gear stage 70, the first sub-transmission 46 and the second spur gear stage 86 are arranged one after the other in the following order: The rotor wheel 98 - the first spur gear stage 70 - the first sub-transmission 46 - the second spur gear 86. This is also the case in 2 shown, second embodiment of the case.

Finally shows 3 a third embodiment of the hybrid drive system 10. In the third embodiment, the internal combustion engine 16 and the electric machine 22 are arranged on the same side of the partial transmission 46 as in the first embodiment.

In the third embodiment, the drive shaft 21 can be connected in a rotationally fixed manner to the first sun gear 54 (first element) by means of the first shifting element 80, so that the connecting element in the third embodiment is the first sun gear (first element 54). The first ring gear (third element 58) and the second planet carrier (fifth element 64) can be connected to one another in a torque-proof manner by means of the second switching element 82 . The first ring gear (third element 58) can be connected to the housing 28 in a rotationally fixed manner by means of the third switching element 84. By means of the fourth switching element 92 are in the third embodiment, the first sun gear (first element 54) and the second planet carrier (fifth element 64) rotatably connected to each other. In particular, the second planet carrier (fifth element 64) can thus be connected to the drive shaft 21 in a torque-transmitting manner, in particular in a torque-proof manner, by means of the fourth shifting element 92 and by means of the first shifting element 80, for example. In the third embodiment, the first ring gear (third element 58) can be connected in a torque-proof manner to the first input gear wheel 76 by means of the fifth shifting element 94 . Furthermore, the first output gear wheel 74 can be connected in a rotationally fixed manner to the output shaft 72 by means of the sixth shifting element 96 . In the third embodiment, the shifting elements 80, 82, 84, 92, 94 and 96 are arranged one after the other in the following order in the axial direction and thus viewed along the axis of rotation of the planetary gear set: The first shifting element 80 - the fourth shifting element 92 - the fifth shifting element 94 - the sixth Switching element 96 - the third switching element 84 - the second switching element 82.

Reference List

10

hybrid drive system

12

vehicle wheel

14

vehicle wheel

16

combustion engine

18

cylinder body

20

cylinder

21

drive shaft

22

electric machine

24

stator

26

rotor

28

Housing

30

final drive

32

final drive housing

34

final drive input gear

36

Arrow

38

balance wheel

40

side wheel

42

sideshaft

44

transmission

46

first partial transmission

48

second sub-transmission

50

first planetary gear set

52

second planetary gear set

54

first item

56

second element

58

third element

60

first planet wheel

62

fourth element

64

fifth element

66

sixth element

68

second planet gear

70

first spur gear stage

72

output shaft

74

first output gear

76

first input gear

78

output gear

80

first switching element

82

second switching element

84

third switching element

86

second spur gear stage

88

second output gear

90

second input gear

92

fourth switching element

94

fifth switching element

96

sixth switching element

98

rotor wheel

100

another gear

Claims (14)

Hybrid drive system (10) for a motor vehicle, with: - an internal combustion engine (16) which has a drive shaft (21) via which first drive torques for driving the motor vehicle can be provided by the internal combustion engine (16), - an electric machine (22), which has a rotor (26) via which second drive torques for driving the motor vehicle can be provided by the electric machine (22), - an axle drive (30) which has an axle drive input wheel (34) via which the axle drive (30) can be driven , - a transmission (44), which has a first partial transmission (46) and a second partial transmission (48), wherein: ◯ the first partial transmission (46) has a first planetary gear set (50) with a first element (54), a second element (56) and a third element (58) and a second planetary gear set (52) with a permanent rotationally fixed to the second element (56) connected, fourth element (62), a fifth element (64) and a sixth element (66), ◯ the second partial transmission (48) has a first spur gear stage (70), a second spur gear stage (86) and an output shaft ( 72), ◯ the first spur gear stage (70) has a first output gear (74) which is arranged coaxially to the output shaft (72) and meshes with a first input gear (76) which is or can be connected in a rotationally fixed manner to the second element (56), ◯ the second spur gear stage (86) has a second output gear (88) which is arranged coaxially to the output shaft (72) and meshes with a second input gear (90) which is or can be connected in a rotationally fixed manner to the sixth element (66), and ◯ the rotor (26) of the electrical machine (22) is coupled or can be coupled in a torque-transmitting manner to one of the elements (54, 56, 58, 62, 64, 66) in such a way that the respective element driven by the electrical machine (22) via the rotor (26) provided second drive torque on the one element (54, 56, 58, 62, 64, 66) which is or can be coupled to the rotor (36) in a torque-transmitting manner can be introduced into the transmission (44), - an output gear (78) which is permanent is connected in a rotationally fixed manner to the output shaft (72) and permanently meshes with the axle drive input wheel (34) of the axle drive (30), - a first switching element (80) which is designed to connect the drive shaft (21) of the internal combustion engine (16) in a rotationally fixed manner to a of the elements (54, 56, 58, 62, 64, 66), and - a second switching element (82) is provided, which is designed to connect the third element (58) to the fifth element (64) in a torque-proof manner , characterized in that the second spur gear stage (86) viewed in the axial direction is arranged on a side of the first spur gear stage (70) facing away from the first partial transmission (46). Hybrid drive system (10) after claim 1 , characterized in that the first switching element (80) is designed to connect the drive shaft (21) in a torque-proof manner to the fifth element (64). Hybrid drive system (10) after claim 1 or 2 , characterized in that the rotor (26) of the electric machine (22) is permanently coupled to the first element (54) in such a way that the respective second drive torque provided by the electric machine (22) via the rotor (26). the first element (54) can be introduced into the transmission (44). Hybrid drive system (10) according to one of the preceding claims, characterized in that a total of exactly two planetary gear sets (50, 52) are provided, namely the first planetary gear set (50) and the second planetary gear set (52). Hybrid drive system (10) according to one of the preceding claims, characterized by a third switching element (84) which is designed to rotate the third element (58) to a housing (28) of the hybrid drive system (10) to connect. Hybrid drive system (10) according to one of the preceding claims, characterized by a fourth switching element (92) which is designed to connect the drive shaft (21) in a rotationally fixed manner to the first element (54). Hybrid drive system (10) after claim 6 , characterized in that the fourth switching element (92) is arranged so that it overlaps axially with respect to the electrical machine (22). Hybrid drive system (10) according to one of the preceding claims, characterized by a fifth switching element (94) which is designed to rotate the sixth element (66) to the second input gear (90) to connect. Hybrid drive system (10) according to one of the preceding claims, characterized by a sixth switching element (96) which is designed to connect the first output gear (74) to the output shaft (72) in a torque-proof manner. Hybrid drive system (10) according to claims 5 , 6 , 7 , 8th and 9 or after the claims 5 , 6 , 8th and 9 , characterized in that viewed in an axial direction, the first shifting element (80), the second shifting element (82), the third shifting element (84), the fourth shifting element (92), the fifth shifting element (94) and the sixth shifting element (96 ) are arranged one after the other in the following order: the first switching element (80) - the fourth switching element (92) - the fifth switching element (94) - the sixth switching element (96) - the third switching element (84) - the second switching element (82). Hybrid drive system (10) according to one of the preceding claims, characterized in that viewed in an axial direction, a rotor wheel (98) of the electric machine (22), the first spur gear stage (70), the first partial transmission (46) and the second spur gear stage (86 ) are arranged one after the other in the following order: the rotor wheel (98) - the first spur gear stage (70) - the first sub-transmission (46) - the second spur gear (86). Hybrid drive system (10) according to one of the preceding claims, characterized in that the drive shaft (21) is arranged coaxially with the first partial transmission (46), the output gear wheel (78) being arranged axially between the internal combustion engine (16) and the first partial transmission (46). is arranged. Hybrid drive system (10) according to one of the preceding claims, characterized in that the first switching element (80) is arranged so that it overlaps axially with respect to the electric machine (22). Motor vehicle with a hybrid drive system according to one of the preceding claims

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