WO2016059076A1

WO2016059076A1 - Hybrid drive system, hybrid vehicle and method for operating a motor vehicle comprising a hybrid drive train

Info

Publication number: WO2016059076A1
Application number: PCT/EP2015/073717
Authority: WO
Inventors: Thomas Gallner; Rainer Knorr
Original assignee: Continental Automotive Gmbh
Priority date: 2014-10-15
Filing date: 2015-10-13
Publication date: 2016-04-21
Also published as: DE102014220862A1

Abstract

The invention relates to a hybrid drive system of a motor vehicle (2), comprising an internal combustion engine (3) and an electric motor (29) which is arranged in a drive train (28) of the motor vehicle (2). Said drive train (28) comprises a transmission (18). Said electric motor (29) is arranged in the drive train (28) between the internal combustion engine (3) and the transmission (18). Said electric motor (29) can be coupled to the internal combustion engine (3) by means of a first detachable form-fitting coupling element (34) and can be coupled to the transmission (18) by means of a second form-fitting coupling element (35).

Description

description

Hybrid drive, hybrid vehicle, and method of operating a motor vehicle with a hybrid powertrain

The invention relates to a hybrid drive of a motor ^¬ vehicle and a method for operating a motor vehicle with a hybrid powertrain. Furthermore, the invention relates to a motor vehicle with a Hybridantriebs- sträng invention.

Hybrid drives for motor vehicles are known and are used to ^¬ taking to increase the performance of the Automotive ^¬ vehicles and driving comfort and their efficiency, erbrauchs by reduction pieces financing of fuel. In this case, in a hybrid drive, an internal combustion engine and at least one electric motor are combined in such a way that both the properties of an internal combustion engine and of an electric motor for driving the vehicle can be utilized. For this purpose, the electric motor can be arranged in various ways in the motor vehicle, depending on the design of the hybrid powertrain.

DE 10 2011 056 431 AI describes a Hybridantriebs- strand for motor vehicles with an internal combustion engine, at least one electric motor, which is designed as a belt starter generator, at least one clutch, at least one Ge ^¬ gear and at least one control device, wherein the

Electric motor is connected via a belt drive with a crankshaft of the internal combustion engine, wherein the belt drive is designed as a continuously variable transmission.

The voltage supply of the electric motor or of the starter generator is typically provided by the vehicle electrical system tion of the motor vehicle provided. In this case, hybrid ^¬ vehicles can be operated with a 12V board voltage, but it is foreseeable that the conventional 12-volt electrical system is increasingly supplemented or replaced by a 48-volt electrical system, especially in the car sector. This has the advantage that much higher electrical services may be provided by the vehicle electrical system without leaving to fly a ma ^¬ imum operating current for a prescribed threshold at ^¬. At the same time, the electrical system of the vehicle and the electric motor are still operated in the low-voltage range, whereby the contact protection limit of 60 volts is not reached.

The object of the present invention is to provide a hybrid drive of a motor vehicle, by which the possibilities of an electrical system in a motor vehicle, such as a 48-V electrical system, can be better utilized compared to conventional hybrid drives, the complexity of the drive and the cost significantly be reduced.

This object is achieved by the subject matter of independent ^¬ patent claims. Advantageous developments are counter ^¬ stand of the dependent claims. According to one embodiment of the invention, this object is achieved by a hybrid drive of a motor vehicle having egg ^¬ nen internal combustion engine and an electric machine, which are arranged in a drive train of the motor vehicle. The drive train also has a transmission. The electric machine is arranged in the drive train between the internal combustion engine and the transmission. In this case, the electric machine with the internal combustion engine by means of a first positive coupling element can be coupled, and with the transmission by means of a second positive coupling ^¬ elements coupled. As a positive coupling ^element who ^¬ couplings described, the connection state is controllable and in which coupling parts form-locking and (controllable) releasably intermesh. As a positive coupling element is to be understood in particular a positive coupling.

The electric machine has a rotor. This ver ^¬ adds (in the longitudinal direction of the rotor) over two ends. At one of these ends or at both ends, jaws in the sense of positive-locking elements of one of the coupling elements or both coupling elements can connect directly or via a jaw carrier. There may be provided positive locking elements directly to one end face or at both end faces of the rotor are faced (preferably axially displaceable) Formschlussele ^¬ elements. Opposing ^interlocking elements are parts of one of the coupling elements, wherein the form- ^{locking ¬} elements are mounted axially displaceable on one side, whereby the coupling state can be defined. In particular, the rotor may have a winding head, from the positive-locking elements in the axial direction, facing away from the rotor, stand out. Further, on a shaft of the rotor, a carrier may be provided with positive locking elements which protrude away from the rotor and which form part of a coupling element. In addition, in each case a support with positive locking elements can be provided on a shaft of the rotor on both sides of the rotor, which protrude away from the rotor. Each carrier, together with the form-locking elements projecting therefrom, forms one part or, in functional terms, one half of a coupling element. The interlocking elements are preferably formed integrally with the carriers, from which they protrude away. The created hybrid drive allows in particular a comfortable, immediate electromotive starting process, in which the internal combustion engine started, to put it graphically: can be entrained. Furthermore, the hybrid drive is particularly well suited for performing a so-called Coasting or Segein. It can also be advantageous in a convenient manner an anti-jerk control of the hybrid vehicle Runaway ^¬ leads. Furthermore, CO 2 savings can be maximized compared to conventional systems.

Preferably, the first releasable interlocking Kupplungsele ^¬ member is a first claw clutch, wherein the second releasable form ^¬ positive clutch member is a second dog clutch.

Advantageously, the clutches can be controlled such that a change-of-mind situation particularly reliabil ^¬ sig and can be safely handled. In addition, the use of dog clutches has the particular advantage that they can be installed to save space, so that an existing ^¬ the powertrain with minimal changes can be adopted.

According to an advantageous embodiment, the first positive connection element is connected to a crankshaft of the Ver ^¬ combustion engine, that is firmly attached to the crankshaft, wherein the second positive coupling element connected to a transmission input shaft of the transmission, that is fixedly mounted on the transmission input shaft.

According to one embodiment of the invention, the first positive coupling element and the second positive coupling element are each electronically switchable. The designs of the necessary actuators can be electrical, mechanical, pneumatic or hydraulic. The triggering follows electronically. For this purpose, the motor vehicle in a suitable Ak ^¬ factors and agents. For this purpose, the motor vehicle may have suitable actuators and means. In this case, the hybrid drive ^¬ be vorzugt may have, which is adapted to switch the first positive clutch member and the second lös ^¬ bare coupling element between a closed state and an open state, a controller.

Furthermore, the controller may be coupled to the electric machine and is preferably configured to control a current torque and a rotational speed of the electric machine.

According to one embodiment of the invention, the controller is adapted to control the hybrid powertrain so that a speed of the engine and a speed of the Ge ^¬ drive, in particular a speed of the transmission input shaft of the transmission can be synchroni ^¬ Siert by means of the electric machine.

Preferably, the motor vehicle has a central control unit (electronic control unit, ECU), wherein the control of the hybrid powertrain is performed by the central control unit.

According to a further advantageous embodiment, the hybrid powertrain and the electric machine are designed to ^¬ to start the engine by means of the electric machine and / or to drive the motor vehicle by means of the electric machine see. This can advantageously be carried out with advertising CLOSED ^¬ senem first positive clutch member and geschlosse ^¬ nem second positive clutch member the. For this purpose, the electric machine can be designed as an integrated starter generator.

In this case, the internal combustion engine and the integrated starter generator can advantageously both be used for boosting the vehicle, in particular during the start.

By inline geschal ^¬ ted within the hybrid powertrain integrated starter generator is also a purely electric driving advantageous possible, for example, with Geschwin ^¬ speeds of up to less than 30 km / h.

Preferably, the motor vehicle has on-board electronics for supplying the electric machine, the onboard electrical system has a nominal voltage of 48 volts. Furthermore, the electrical system electronics can be powered by a hybrid battery.

According to one aspect of the invention, there is also provided a method of operating a motor vehicle comprising a hybrid powertrain having an internal combustion engine, an electrical engine

Machine, and having a gearbox. The electrical ^¬ specific machine is arranged on a crankshaft of the internal combustion engine at ^¬. During operation of the vehicle, a Verbin ^¬ connection between the engine and the electric machine is ma- by a first dog clutch connected. Further, a connection between the electric machine and the transmission is switched by a second dog clutch.

According to one aspect of the invention, there is also provided a hybrid vehicle, in particular a hybrid car, having a hybrid drive according to an embodiment of the invention, wherein the hybrid vehicle is driven by the hybrid drive. The invention will now be explained in more detail with reference to the attached figures, wherein further advantages and features of the invention will become apparent from the following description of embodiments with reference to the attached figures. It should be noted that from this description and the figures also

Features of embodiments emerge, which are not explicitly mentioned in the claims. Furthermore, the features of the different aspects of the invention may also appear in other combinations which are not specifically discussed. The fact that several such features in a same sentence or in another type of text associated with each other are mentioned thus, does not justify the conclusion result ^¬ tion that these features may be present only in the combination specifically disclosed herein. Rather, it is assumed that the described features may be omitted or modified, under the constraint that characterized the functionality of the invention is not ge in question ^¬ represents. 1 shows a schematic view of components of an on ^¬ drivetrain of a motor vehicle in a 12-V P0 configuration,

FIG. 2 shows a schematic view of components of a drive train of a motor vehicle in a 48 V PO.

Configuration,

Figure 3 is a schematic view of components of an on ^¬ drive train of a motor vehicle in a 48-V P2 configuration, according to an embodiment of the invention, 4 shows a flow of a gear shift in a drive train Hybridan ^¬, according to an embodiment of the invention, Figure 5 shows a flow of a startup of a motor vehicle with a hybrid drive train according to an embodiment of the invention, and

6 shows a process flow in which the combustion engine of the motor vehicle, such as ^¬ is dergestartet from a Ausrollphase out, according to an embodiment of the invention.

In the following detailed description, like or similar components in different figures are sometimes designated by the same reference numeral. Further, partly components that have already been explained in connection with a figure and are also used in embodiments according to another figure, not explicitly again erläu ^¬ tert.

1 shows a view of a typical configuration of components of a conventional powertrain 1 of a motor vehicle 2 with associated electrical components. It is understood that the drawings are very schematic darge ^¬ represents. As shown in the figure 1, the force ^¬ vehicle 2 on an internal combustion engine 3, which is provided a generator 5 with a starter 4 and. The starter 4 is exemplified here as a pinion starter 4. The starter 4 has a small pinion 6 which together ^¬ menwirkt with a large pinion 7 of a flywheel 8 of the engine 3, wherein the flywheel 8 is mounted on the crankshaft 16 of the engine. 3 Further, the generator 5 formed as an alternator 5 and via a belt drive 9 with a shaft 10 of the engine 3 verbun ^¬ the. The belt drive 9 includes a first drive wheel 11, which is coupled to the generator 5, a second drive wheel 12 which is coupled to the shaft 10 of the engine 3, and to the first drive wheel 11 and the second driving wheel 12 umlau ^¬ fendes leavening 13 For example, a V-belt. FIG. 1 also shows the fuel tank 22 for the internal combustion engine 3.

The motor vehicle has on-board electronics 14, which is equipped with a vehicle battery 15, here: a 12-volt battery 15. By the alternator 5, which is operated by the internal combustion engine 3, electrical energy can be fed into the electrical system 14, which can be stored in the vehicle battery 15. By the vehicle battery 15, the starter 4 and other, not explicitly shown here further electrical components of the motor vehicle 2 are fed.

The crankshaft 16 is connected to a transmission clutch 17, which has its output connected to a gear 18 of the motor driving ^¬ zeugs. 2 The transmission clutch 17 is a friction clutch. The transmission 18 is designed, for example, as an automatic transmission or a manual transmission. A Getriebeaus ^¬ input shaft 19 of the transmission 18 is further provided with a differentiation ^¬ tialgetriebe 20 of the drive shaft 21 of the motor vehicle 2 ver ^¬ prevented. Although in FIG. 1 the starter 4 and the generator 5 are arranged as separate components at different positions, it is also conceivable to replace the generator 5 by a belt starter generator 23, by means of which the internal combustion engine 3 can be started With the configuration shown in Figure 1, which uses a 12 volt vehicle electrical system, a classic start-stop system can be realized. The configuration according to FIG. 1 is comparable to a 12 volt P0 system, in which the generator 5 or a belt starter generator 23 is arranged at the corresponding position "0", ie as a belt generator The start-stop system according to FIG thereby adapted to the internal combustion engine 3 of the vehicle 2 can be stopped automatically if the vehicle 2 examples of play at a traffic light stops or is in an Ver ^¬ traffic congestion. It is also a start-stop system is conceivable in which the internal combustion engine 3 is already turned off when the motor vehicle 2 is braked by the driver, for example, in front of a traffic light, so that the vehicle 2 approaches the traffic light with the internal combustion engine 3 turned off, but a so-called change-of-mind situation with the configuration shown in FIG Figure 2 is a schematic view of a typical 48V PO configuration nes drive train 27 of a motor vehicle ^¬ 2. In contrast to the 12-V-P0 configuration of Figure 1, the motor vehicle 2 here in addition a 48-volt vehicle electrical system on. The 48-volt vehicle electrical system is here equipped with a hybrid battery 26, which is connected to a corresponding on-board ^¬ network electronics 25. The 48-volt vehicle electrical system 25 and the 12-volt vehicle electrical system 14 may be interconnected, which is not shown explicitly in FIG. 2 for the sake of simplicity. The generator 5 and the starter generator 23 of Figure 1 are replaced in Figure 2 by a designed for the 48-volt electrical system starter generator 24. Otherwise, the drive corresponds to Strand 27 according to FIG. 2 essentially the drive train 1 according to FIG. 1.

3 shows a schematic view of components in a powertrain 28 of a motor vehicle 3 to which a Schlos ^¬ Senen electrical components in a P2-configuration, i.e. the electric machine 29 is disposed on the input shaft Getriebeein ^¬ 30th Is Illustratively stated, a hybrid ^¬ drive with an "in-line" arranged electric machine 29 provided, that is, the internal combustion engine 3 and electric machine 29 are arranged linearly one behind the other. The electric machine 29 of the shown in Figure 3 Hybridan ^¬ drive train 28 is coupled to The integrated starter generator 29 has a stator 36 and a rotor 37 and is preferably an internal rotor machine, whereby the flywheel 8 of the internal combustion engine 3 is replaced by the rotor 37 of the integrated starter generator 29 that is, the rotor 37 of the integrated starter generator 29 also functions as a flywheel of the internal combustion engine

Flywheel 8 of the internal combustion engine 3 can therefore be omitted, whereby weight and cost can be saved.

In the figure 3, the board power electronics 25 is shown with the feeding through the hybrid battery 26 Bordnetzelekt ^¬ ronik 26 may comprise different electrical units 31 of the motor ^¬ vehicle, one of which is shown in FIG. 3 Although the hybrid battery 26 of Figure 3 is a 48 volt hybrid battery, the aspects of the invention are not limited in principle to a nominal voltage of 48 volts. For example, it is also conceivable that the nominal voltage is only 42 volts, or even more than 48 volts. Furthermore, in the vehicle preferably still a her- conventional 12-volt vehicle electrical system with a 12-volt vehicle battery 15 is arranged to be supplied with the electrical modules 32, of which in Figure 3, a module 32 is shown by way of example. Furthermore, the vehicle 3 typically has auxiliary units 33 of the internal combustion engine 3, which are connected to the internal combustion engine 3 via the belt drive 9. With the 48-volt vehicle electrical system voltage higher performance and a relatively high torque of the electric machine 29 can be achieved compared to the conventional 12-volt vehicle electrical system voltage. Furthermore, due to the increased vehicle electrical system voltage lower losses and higher efficiency, in particular ^¬ special, no additional load of the 12-volt electrical system takes place during the boot process. As shown in the figure 3, the hybrid drive ^¬ strand 28 on a first clutch 34, as the form-locking coupling, in this case is designed as a dog clutch 34th The first dog clutch 34 is connected to the crankshaft 16 of the engine 3 and connects the engine 3 with the integrated starter generator 29. Further, the hybrid powertrain 28, a second clutch 35, which also as a positive clutch, here: as a dog clutch 35 ^{ausgebil ¬} it is. The second dog clutch 35 is connected to the transmission input shaft 30 and connects the integrated Star tergenerator 29 with the gear 18. The integrated starter ^¬ generator 29 and the second dog clutch 35 are by means of ei ^¬ ner output shaft 39 of the integrated starter generator 29 connected to each other. The hybrid drive and the two clutches 34 and 35 are controlled by the controller 38.

The property that the clutches 34, 35 are not formed as friction clutches rather than jaw clutches ^¬ 34, 35 is operatively supported in particular by the fact that a synchronization of the rotational speed of the internal combustion engine 3 with a rotational speed of the transmission 18 can be made by the integrated starter generator 29. The synchronization can in particular in connection with a shift, that is, the implementation of a gear change of the transmission 18 he follow ^¬ . The control of the synchronization can be done automatically by the controller 38. This will be explained in more detail below with reference to FIG. 4 shows an exemplary flow of a gear shift by using the hybrid drive train 28 shown in Figure 3. At the beginning of the process in egg ^¬ nem determine the vehicle gear, for example, in the first gear. See step S1. As further shown in step S2, both jaw clutches 34, 35 are closed during travel. As a result, for example by both motors 3, 29, that is, by the internal combustion engine 3 and the integrated starter generator 29, a torque can be generated by which the vehicle 2 is moved. Now, a gear change should be performed while driving. In this exemplary case, for example, it is intended to shift up into second gear. For this, the torque of both the combustion ^¬ motor 3 and the integrated starter generator 29 are first brought to a value of 0 Nm, respectively, the motors if they are not already idling in the

Idle mode brought. See step S3. Now, according to step S4, the second dog clutch 35 is opened so that the rotational connection between the integrated starter generator 29 and the transmission 18 is released. In the ren of the motorcycle 3, 29 uncoupled gear 18 is now the gear geschal ^¬ tet, here: upshifted to second gear, step S5. Even in the separated state of the transmission 18, ie with the second claw clutch 35 open, in step S6, a speed synchronization is now carried out by means of the integrated starter generator 29 by bringing the rotational speed of the internal combustion engine 3 to a rotational speed which is one speed of the transmission 18 or a speed of the transmission input shaft 30 approximately matches. The Steue ^¬ tion of the synchronization and related measurements for this purpose can be done by means of the controller 38.

After performing the synchronization, the output shaft 39 of the integrated starter generator 39 and the transmission input shaft 30 are at approximately the same speed. Now ^¬ more, the second jaw clutch 35 is closed in step S7. Thus, the torque train of the hybrid drive is closed again, and the procedure of the gear change is be ^¬ ends.

According to another aspect of the invention, when the Klau- enkupplungen 34, 35 are both closed, a positive rotary connection bereitge ^¬ represents by the hybrid powertrain 28, wherein a signal generated by the integrated starter generator 29 torque can be transmitted without slippage over the entire hybrid powertrain 28 away particular can. This is especially true for a lower speed range during startup of the motor vehicle 2. Since in this case the dog clutch 35 between the integrated starter generator 29 and the transmission 18 is closed, a torque of the integrated starter generator 29 is transmitted immediately to the drive wheels of the vehicle 3. This allows a smooth electromotive approach done, which also has a high level of comfort for the driver and passengers. Fer ^¬ ner can, since the first dog clutch 34 further also a provides interlocking rotational connection between the engine 3, while the electromotive start the same time ^¬ the engine 3 are started. Thus, the integrated starter generator 29 not only replaces that

Flywheel 8 of the motor 3, as already mentioned above, but it can also in particular also on the use of a pinion starter, such as the pinion starter 4 shown in Figures 1 and 2 are omitted, since the integrated starter generator 29 in particular as a starter fun - yells.

Further, since the first dog clutch 34 also provides a positive rotational connection between the engine 3 and the engine 3, the engine 3 may be started simultaneously during the electromotive starting. Thus, the integrated starter generator 29 not only replaces that

Flywheel 8 of the motor 3, as already mentioned above, but it can also be particularly in particular on the use of a pinion starter, such as the pinion starter 4 shown in Figures 1 and 2 15 omitted, since the integrated starter generator 29 in particular as a starter acts.

FIG. 5 shows a sequence of starting a motor vehicle 3 with the hybrid drive train 28, according to an embodiment of the invention. At the beginning of the process, the vehicle is stationary, which is referred to in step S10 in FIG. For starting, the first Klauenkupp ^¬ ment 34 and the second dog clutch 35 are both closed in step Sil. In step S12, the integrated starter generator 29 is ^¬ controls so that torque is generated by the motor vehicle 3 starts moving. For this purpose, a gear was previously engaged, and now by the electric machine 29, ie an immediate start is started by the integrated starter generator 29. Since both jaw clutches 34 and 35 are closed, this has the consequence that the rotational movement of the integrated starter generator 29 is also transmitted to the crankshaft 16 of the engine 3, whereby the combus ^¬ tion motor 3 is started, see step 13. At the same time finds an acceleration of the vehicle 2 instead, step 14. With both running motors 3, 29, a boost is now carried out up to a certain speed, that is, both by the engine 3 and by the integrated starter generator 29 is a positive torque to the drive shaft ^¬ 21 issued. The boosting operation can be carried out until, for example, a respective engine speed of at least 1500 revolutions per minute is reached, step S15, after which the starting operation is completed. However, the exact speed may depend on the particular setting and the specific layout of the hybrid powertrain 28. Further, S14 of the acceleration during the at ^¬ driving can be performed at least partially simultaneously with or before step S13, depending on the procedure, the step, wherein the vehicle is accelerated during the Boos Tens in step S15.

With the present hybrid powertrain of Figure 3 or another possible embodiment and variant are by appropriate driving the hybrid powertrain

28 and switching the jaw clutches 34, 35 copes all possible driving situations particularly reliable. Here, the hybrid powertrain is particularly well suited for vehicles of the classes A to C. Possible procedures relate to examples game, a warm start, in particular the above explained in co ^¬ menhang with Figure 5 instant hot start, cold start of the engine, a change from a NOR ^¬ paint driving situation on a sailing, or leakage or Roll out of the vehicle motion ( "coasting") in switched-off internal combustion engine, a restarting of the internal combustion engine during coasting, or a start on the fly Ver ^¬ brennungsmotor. Further fits reasonable to the hybrid drive system, a recuperation of energy, or a change from a normal driving situation, automatically to a recuperation mode or vice versa.

FIG. 6 shows by way of example a sequence of a start-up procedure of the internal combustion engine 3, while the motor vehicle 3 is in a coasting phase. Illustratively, the engine 3 is restarted from a "coasting" phase As described in Fig. 6, during the step S20, the vehicle is in a state where the first dog clutch 34 is opened, whereas the second dog clutch 35 is closed. this means that the vehicle 3 without combustion engine drive fah ^¬ ren or roll can, wherein the vehicle 2 is not decelerating by the decoupling of the engine 3, since the motor brake is eliminated. this leaves more kinetic energy preserver ^¬ th, the 6, the engine 3 is then turned off in step S21 In step S22, a control signal is generated or a control command issued by the controller 38, so that no torque from the engine 3 and the integrated starter generator is impressed on the drive axle 21, wherein the two Ite claw ^¬ clutch 35 is opened. In step S23, the second claw ^¬ clutch 35 is open, as well as the first dog clutch, compare step S20.

According to step S24, the integrated starter generator 29 is now stopped so that now both the integrated starter generator Rator 29 and the internal combustion engine 3 are decoupled within the hybrid powertrain 28 and have the same speed zero. Further, then the first dog clutch 34 is driven to close. In step S25, the first dog clutch 34 is then closed, so that the rotary connection between the engine 3 and the integrated starter generator 29 is restored. Now, in steps S26 and S27 of the internal combustion engine 3 is started by means of the integrated starter generator 29 and brought to a speed at which the internal combustion engine 3 and the integrated Starterge ^¬ generator 29 has approximately the same speed as the transmission 18. Then, in step S28, the second dog clutch 35 is closed. Finally, in step S29, the internal combustion engine 3 and the integrated starter generator 29 are controlled, and the motor vehicle 2 now drives by means of both motors 3, 29 generated torques. Thus, for example, according to a mild hybrid drive through the integrated starter generator 29 additional drive power can be provided.

As those skilled in the art will recognize, in the foregoing description only exemplary embodiments of aspects of the invention have been shown, and many changes can be made in the function and arrangement of elements or steps described in an exemplary embodiment without departing from the scope of the appended claims and claims to leave their legal equivalents. Reference sign list

1 powertrain

2 motor vehicle

3 internal combustion engine

4 starters

5 generator

6 pinions

7 pinions

8 flywheel

9 belt drive

10 wave

11 drive wheel

12 drive wheel

13 leavening agents

14 electrical system electronics

15 vehicle battery

16 crankshaft

17 Transmission coupling

18 gears

19 transmission output shaft

20 differential gear

21 drive axle

22 fuel tank

23 Belt starter generator

24 belt starter generator

25 electrical system electronics

26 hybrid battery

27 powertrain

28 hybrid powertrain

29 integrated starter generator, electric machine

30 transmission input shaft

31 electrical unit electrical module

Auxiliary first claw clutch second claw clutch

stator

runner

control

output shaft

Claims

claims

1. Hybrid drive of a motor vehicle (2), with a Ver ^¬ internal combustion engine (3) and an electric machine (29) which are arranged in a drive train (28) of the motor vehicle (2), wherein the drive train (28) further comprises a transmission ( 18), a first releasable form-fitting coupling element (34), and a second releasable form-fitting coupling ^element (35) and the electric machine (29) in the drive train (28) between the internal combustion engine (3) and the transmission (18) is, wherein the electric machine (29) with ^{¬ means of} the first releasable positive coupling element (34) with the internal combustion engine (3) is coupled and by means of the second positive Kupplungsele ^¬ element (35) with the transmission (18) can be coupled.

2. hybrid drive according to claim 1, wherein the first releasable positive coupling element (34) has a first claw ^¬ coupling (34) and wherein the second releasable positive coupling element (35) has a second claw ^¬ coupling (35).

3. Hybrid drive according to claim 1 or 2, wherein the first positive connection element (34) with a crank ^¬ shaft (16) of the internal combustion engine (3) is connected and the second positive coupling element (35) with ei ^¬ ner transmission input shaft (30) of the transmission is ver ^¬ inhibited (18).

4. Hybrid drive according to one of the preceding claims, wherein the first positive coupling element (34) and the second positive coupling element (35) respectively by means of control are electronically switchable and wherein the hybrid drive further comprises a controller (38) ^¬ , which is adapted to the first formschlüs ^¬ sige coupling element (34) and the second Kupplungsele ^¬ ment (35) between a closed state and an open state to switch.

Hybrid drive according to claim 4, wherein the controller (38) is coupled to the electric machine (29) and there ^¬ is set to control a current torque and a rotational speed of the electric machine (29).

Hybrid drive according to claim 5, wherein the controller (38) is further adapted to control the hybrid drive train (28) so that a rotational speed of the combustion ^¬ motor (3) and a rotational speed of the transmission (18), in particular ^¬ sondere a rotational speed of the Transmission input shaft (30) of the transmission (18), by means of the electric machine (29) can be synchronized.

Hybrid drive according to one of claims 4 to 6, wherein the controller (38) by a central control device of the motor vehicle (2) is realized.

Hybrid drive according to one of the preceding claims, wherein the hybrid powertrain (28) and the electric machine (29) are adapted to Verbrennungsmo ^¬ tor (3) by means of the electric machine (29) to star ^¬ th and / or the motor vehicle (2) to approach by means of the electric machine (29) if the first form- ^fitting coupling element (34) and the second form- ^fitting coupling element (35) are each closed.

Hybrid drive according to one of the preceding claims, wherein the motor vehicle (2) has an on-board power electronics (25) for supplying the electrical machine, said board power electronics (25) has a nominal voltage of, for example, 48 volts and / or wherein the board ^¬ network electronics (25) through a hybrid battery (26) is ge ^¬ fed.

10. A method for operating a motor vehicle (2) with a hybrid powertrain (28) having an internal combustion engine (3), a transmission (18), and an electrical machine (29) on a crankshaft (16) of the Ver ^¬ internal combustion engine (3), wherein during operation of the vehicle (2) a connection between the

Combustion engine (3) and the electric machine (29) by a first dog clutch (34) is switched and a connection between the electric machine (29) and the transmission (18) by a second dog clutch (35) is switched.

11. hybrid vehicle (2), in particular hybrid car (2), the egg ^¬ nen hybrid drive according to one of claims 1 to 9, ^¬ with which the hybrid vehicle (2) is driven.