Hybrid drive system and vehicle

Abstract

A hybrid power drive system includes an engine, an input shaft, a transmission shaft, a first motor, a planetary gear device, a clutch, a first brake device, an intermediate shaft, a second motor and a differential, wherein the planetary gear device includes a first sun gear, a first planet carrier, a ring gear, a second sun gear and a second planet carrier, wherein the ring gear is respectively meshed with the first planet gear and the second planet gear, the engine is connected to the input shaft, the first planet carrier is fixed on the input shaft, the first motor is connected to the first sun gear, and the second sun gear is fixed on the transmission shaft; the second planet carrier is connected to the intermediate shaft; the second motor is connected to the intermediate shaft; the intermediate shaft is connected to the differential; the clutch is used to combine or separate the second sun gear and the ring gear, the first brake device is connected to the transmission shaft, and the first brake device is used to brake or unlock the second sun gear. The hybrid power drive system of the present invention has multiple working modes. The present invention also relates to a vehicle.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to a hybrid power drive system and a vehicle. Background Art

[0002] Developing environmentally friendly and energy-saving cars has become the development direction of the automobile industry.

[0003] Among energy-saving cars and new energy vehicles, the technical bottlenecks of pure electric vehicles, such as long charging time and short driving range in winter, have not yet been broken through; the cost of hydrogen fuel cell vehicles remains high, and the construction of hydrogen refueling infrastructure will take time. Hybrid vehicles can achieve energy conservation and emission reduction even with existing charging facilities, and are currently a more realistic and feasible solution. Therefore, major car companies have launched or are developing their own hybrid models.

[0004] To achieve energy saving in hybrid vehicles, hybrid vehicles need to have multiple working modes and switch to the most economical working mode according to the actual conditions such as vehicle speed and vehicle torque demand. Therefore, in order to achieve the purpose of energy saving, it is necessary to design a hybrid transmission device with multiple working modes. Summary of the invention

[0005] In view of this, the present invention provides a hybrid power drive system, which has a relatively simple and compact structure, is easy to arrange, and has multiple working modes.

[0006] A hybrid power drive system includes an engine, an input shaft, a transmission shaft, a first motor, a planetary gear device, a clutch, a first brake device, an intermediate shaft, a second motor and a differential, wherein the planetary gear device includes a first sun gear, a first planet carrier, a ring gear, a second sun gear and a second planet carrier, the first planet carrier is provided with a first planetary gear, the second planet carrier is provided with a second planetary gear, and the ring gear is meshed with the first planetary gear and the second planetary gear respectively, wherein:

[0007] The engine is connected to the input shaft, the first planet carrier is fixed on the input shaft, the first motor is connected to the first sun gear, and the second sun gear is fixed on the transmission shaft;

[0008] The second planet carrier is connected to the intermediate shaft;

[0009] The second motor is connected to the intermediate shaft;

[0010] The intermediate shaft is connected to the differential;

[0011] The clutch is used to connect or disconnect the second sun gear and the ring gear. The first brake device is connected to the transmission shaft. The first brake device is used to brake or unlock the second sun gear.

[0012] In an embodiment of the present invention, the hybrid driving system further comprises a second braking device, wherein the second braking device is connected to the input shaft, and the second braking device is used to brake or unlock the first planet carrier.

[0013] In an embodiment of the present invention, a first gear and a second gear are fixedly disposed on the intermediate shaft, a differential gear is disposed on the differential, the first gear is meshed with the second planet carrier, and the second gear is meshed with the differential gear.

[0014] In an embodiment of the present invention, the second motor has a second motor output shaft, a third gear is fixedly provided on the second motor output shaft, and the third gear is meshed with the first gear.

[0015] In an embodiment of the present invention, the above-mentioned first motor includes a first shell, a first motor stator and a first motor rotor, the first motor stator is connected in the first shell, the first motor stator and the first motor rotor are arranged opposite to each other, and the first motor rotor is fixed on the first planetary carrier.

[0016] In an embodiment of the present invention, the above-mentioned hybrid drive system has a pure electric first gear mode and a pure electric second gear mode. In the pure electric first gear mode, the clutch is disengaged, the first braking device brakes the second sun gear, and is driven by the second motor; in the pure electric second gear mode, the clutch is engaged, the first braking device is disengaged, and is driven by the second motor.

[0017] In an embodiment of the present invention, the above-mentioned hybrid drive system has a power-split hybrid first gear mode and a power-split hybrid second gear mode. In the power-split hybrid first gear mode, the clutch is disengaged, the first braking device brakes the second sun gear, and is driven by the engine and the first motor and / or the second motor; in the power-split hybrid second gear mode, the clutch is engaged, the first braking device unlocks the second sun gear, and is driven by the engine and the first motor and / or the second motor.

[0018] In an embodiment of the present invention, the above-mentioned hybrid drive system has a pure electric first gear mode and a pure electric second gear mode. In the pure electric first gear mode, the clutch is disengaged, the first braking device brakes the second sun gear, and the second braking device brakes the first planetary carrier, and is driven by the first motor and / or the second motor; in the pure electric second gear mode, the clutch is engaged, the first braking device unlocks the second sun gear, and the second braking device brakes the first planetary carrier, and is driven by the first motor and / or the second motor.

[0019] In an embodiment of the present invention, the above-mentioned hybrid drive system has a power-split hybrid first-gear mode and a power-split hybrid second-gear mode. In the power-split hybrid first-gear mode, the clutch is disengaged, the first braking device brakes the second sun gear, and the second braking device unlocks the first planetary carrier, and is driven by the engine and the first motor and / or the second motor; in the power-split hybrid second-gear mode, the clutch is engaged, the first braking device unlocks the second sun gear, and the second braking device unlocks the first planetary carrier, and is driven by the engine and the first motor and / or the second motor.

[0020] The present invention also provides a vehicle, comprising the hybrid power drive system mentioned above.

[0021] The overall structure of the hybrid power drive system of the present invention is relatively simple and compact, and is easy to arrange. It can realize a pure electric first gear mode, a pure electric second gear mode, a power split hybrid first gear mode, and a power split hybrid second gear mode. The working mode is switched according to the vehicle speed and the torque demand of the whole vehicle, and better power and economy can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of a hybrid power drive system according to the first embodiment of the present invention.

[0023] Figure 2 Schematic diagram of the levers of the hybrid drive system of the first embodiment of the present invention in the pure electric first gear mode.

[0024] Figure 3 Schematic diagram of the levers of the hybrid drive system of the first embodiment of the present invention in the pure electric second gear mode.

[0025] Figure 4 Schematic diagram of the levers of the hybrid power drive system of the first embodiment of the present invention in the power split hybrid first gear mode.

[0026] Figure 5 Schematic diagram of the levers of the hybrid power drive system of the first embodiment of the present invention in the power split hybrid second gear mode.

[0027] Figure 6 Schematic diagram of the structure of a hybrid power drive system according to a second embodiment of the present invention.

[0028] Figure 7 Schematic diagram of the levers of the hybrid power drive system of the second embodiment of the present invention in the pure electric first gear mode.

[0029] Figure 8Schematic diagram of the levers of the hybrid power drive system of the second embodiment of the present invention in the pure electric second gear mode.

[0030] Fig. 9 Schematic diagram of the levers of the hybrid power drive system of the second embodiment of the present invention in the power split hybrid first gear mode.

[0031] Fig.10 Schematic diagram of the levers of the hybrid power drive system of the second embodiment of the present invention in the power split hybrid second gear mode. DETAILED DESCRIPTION

[0032] First embodiment

[0033] Figure 1 is a schematic diagram of the structure of a hybrid power drive system according to a first embodiment of the present invention. Figure 1 As shown, the hybrid drive system includes an engine 11, an input shaft 12, a transmission shaft 13, a first motor 14, a planetary gear device 15, a clutch 16, a first brake device 17, a second brake device 18, an intermediate shaft 19, a second motor 20, a differential 21 and a power battery (not shown). Among them, the planetary gear device 15 includes a first sun gear 151, a first planet carrier 152, a ring gear 153, a second sun gear 155 and a second planet carrier 156, that is, the planetary gear device 15 has two planet rows, and the two planet rows share a ring gear 153. Specifically, the first planet carrier 152 is provided with a first planetary gear 154, the first planetary gear 154 is connected to the first planet carrier 152 through a rolling bearing or a sliding bearing, and the first planetary gear 154 is respectively meshed with the first sun gear 151 and the ring gear 153; the second planet carrier 156 is provided with a second planetary gear 157, the second planetary gear 157 is connected to the second planet carrier 156 through a rolling bearing or a sliding bearing, and the second planetary gear 157 is respectively meshed with the second sun gear 155 and the ring gear 153.

[0034] The engine 11 is connected to the input shaft 12, and the first planet carrier 152 is fixed on the input shaft 12, so that the input shaft 12 and the first planet carrier 152 can rotate synchronously. In this embodiment, the engine 11 is a gasoline engine or a diesel engine.

[0035] The transmission shaft 13 and the input shaft 12 are arranged along the same axis, and the second sun gear 155 is fixed on the transmission shaft 13 so that the transmission shaft 12 and the second sun gear 155 can rotate synchronously.

[0036] like Figure 1As shown, the first motor 14 is connected to the first sun gear 151. Specifically, the first motor 14 includes a first housing 141, a first motor stator 142 and a first motor rotor 143. The first motor stator 142 and the first motor rotor 143 are arranged opposite to each other, the first motor stator 142 is connected in the first housing 141, and the first motor rotor 143 is fixed on the first sun gear 151. In this embodiment, the first motor 14 is a driving and generating integrated machine.

[0037] The clutch 16 is used to engage or disengage the second sun gear 155 and the ring gear 153. When the clutch 16 is engaged, the second sun gear 155 and the ring gear 153 are locked together; when the clutch 16 is disengaged, the second sun gear 155 and the ring gear 153 are separated from each other.

[0038] The first brake device 17 is connected to the transmission shaft 13, and the first brake device 17 is used to brake or unlock the second sun gear 155 through the transmission shaft 13. The first brake device 17 is, for example, a brake or a one-way clutch. When the first brake device 17 brakes the second sun gear 155, the second sun gear 155 is fixed and cannot rotate; when the first brake device 17 unlocks the second sun gear 155, the second sun gear 155 can rotate.

[0039] The second brake device 18 is connected to the input shaft 12, and is used to brake or unlock the first planet carrier 152 through the input shaft 12. The second brake device 18 is, for example, a brake or a one-way clutch. When the second brake device 18 brakes the first planet carrier 152, the first planet carrier 152 is fixed and cannot rotate; when the second brake device 18 unlocks the first planet carrier 152, the first planet carrier 152 can rotate.

[0040] The second planet carrier 156 is connected to the intermediate shaft 19 . Specifically, a first gear 191 and a second gear 192 are fixedly provided on the intermediate shaft 19 . The first gear 191 and the second gear 192 are spaced apart from each other, and the first gear 191 and the first planet carrier 152 are meshed with each other.

[0041] The second motor 20 is connected to the intermediate shaft 19. Specifically, the second motor 20 is arranged in parallel with the first motor 14. The second motor 20 has a second motor output shaft 201. The second motor output shaft 201 is fixed with a third gear 202, and the third gear 202 is meshed with the first gear 191. The second motor 20 includes a second housing 203, a second motor stator 204 and a second motor rotor 205. One end of the second motor output shaft 201 is arranged in the second housing 203. The second motor stator 204 and the second motor rotor 205 are arranged opposite to each other. The second motor stator 204 is connected in the second housing 203, and the second motor rotor 205 is fixed on the second motor output shaft 201. In this embodiment, the second motor 20 is a driving and generating integrated machine.

[0042] The intermediate shaft 19 is connected to the differential 21. Specifically, the differential 21 is provided with a differential gear 211, which meshes with the second gear 192. The differential 21 is used to adjust the speed difference between the left and right wheels. When the car turns or drives on an uneven road, the left and right wheels roll at different speeds to ensure that the driving wheels on both sides perform pure rolling motion.

[0043] The power battery is electrically connected to the first motor 14 and the second motor 20. The power battery provides the first motor 14 and the second motor 20 with electric energy for driving, and the electric energy generated when the first motor 14 and the second motor 20 are driven to rotate can also be stored in the power battery.

[0044] The hybrid power drive system of the present invention has a pure electric first gear mode, a pure electric second gear mode, a power split hybrid first gear mode and a power split hybrid second gear mode.

[0045] Figure 2 Schematic diagram of the levers of the hybrid drive system of the first embodiment of the present invention in the pure electric first gear mode. Figure 2 As shown, in the pure electric first gear mode, the clutch 16 is disengaged, the first brake device 17 brakes the second sun gear 155, the second brake device 18 brakes the first planetary carrier 152, the engine 11 does not work, and is driven by the first motor 14 and / or the second motor 20. In this working mode, the transmission ratio of the transmission mechanism composed of the ring gear 153, the second sun gear 155, and the second planetary carrier 156 is (i 02 is the gear ratio between the ring gear 153 and the second sun gear 155), and operating in the pure electric first gear mode can obtain better power than the pure electric second gear mode.

[0046] Figure 3 Schematic diagram of the lever of the hybrid drive system of the first embodiment of the present invention in the pure electric second gear mode. Figure 3 As shown, in the pure electric second gear mode, the clutch 16 is engaged, the first brake device 17 unlocks the second sun gear 155, the second brake device 18 brakes the first planetary carrier 152, the engine 11 does not work, and is driven by the first motor 14 and / or the second motor 20. In this working mode, the transmission ratio of the transmission mechanism composed of the ring gear 153, the second sun gear 155, and the second planetary carrier 156 is 1, and some medium and high speed sections work in this pure electric second mode to obtain better economy than the pure electric first gear.

[0047] Figure 4 FIG. 1 is a schematic diagram of the levers of the hybrid power drive system of the first embodiment of the present invention in the power split hybrid first gear mode. Figure 4As shown, in the power split hybrid first gear mode, the clutch 16 is disengaged, the first brake device 17 brakes the second sun gear 155, and the second brake device 18 unlocks the first planetary carrier 152, and the engine 11 is driven and the first motor 14 and / or the second motor 20 are driven (generating electricity or driving wheels according to the working conditions). In this working mode, the transmission ratio of the transmission mechanism composed of the ring gear 153, the second sun gear 155, and the second planetary carrier 156 is (i 02 is the gear ratio between the ring gear 153 and the second sun gear 155), and operating in the power-split hybrid first gear mode can obtain better power than the power-split hybrid second gear mode.

[0048] Figure 5 FIG. 1 is a schematic diagram of the levers of the hybrid power drive system of the first embodiment of the present invention in the power split hybrid second gear mode. Figure 5 As shown, in the power split hybrid second gear mode, the clutch 16 is engaged, the first brake device 17 unlocks the second sun gear 155, and the second brake device 18 unlocks the first planetary carrier 152. The engine 11 is driven and the first motor 14 and / or the second motor 20 are driven (power generation or driving wheels is selected according to the remaining power of the power battery). Under the medium and small throttle conditions, the first motor 14 generates electricity and the second motor 20 assists in driving the wheels; under the throttle condition, the first motor 14 and the second motor 20 both drive the wheels. In this working mode, the transmission ratio of the transmission mechanism composed of the ring gear 153, the second sun gear 155, and the second planetary carrier 156 is 1. In some vehicle speed ranges, working in the power split hybrid second gear mode can obtain better power than the power split hybrid first gear mode.

[0049] The hybrid drive system provided in the embodiment of the present invention has a pure electric first gear mode, a pure electric second gear mode, a power split hybrid first gear mode and a power split hybrid second gear mode, and can automatically switch between different modes according to the SOC (remaining power) value of the power battery and the vehicle speed requirement. For example, the relationship between the power battery SOC value and the first threshold value is judged, or the relationship between the power battery SOC value and the first threshold value and the relationship between the vehicle speed and the second threshold value are judged at the same time; according to the judgment result, the working mode of the hybrid drive system is switched. It should be noted that the first threshold value is used to judge the level of the power battery SOC value, and the second threshold value is used to judge the level of the vehicle speed. This embodiment does not limit the value range of the first threshold value and the second threshold value, which can usually be freely set according to the specific control strategy. Under different control strategies, the values ​​of the first threshold value and the second threshold value are not the same. After setting the first threshold value and the second threshold value, it is automatically judged and automatically switched between various modes according to the judgment result.

[0050] The above working modes are specifically reflected in the table as follows:

[0051]

[0052] Second embodiment

[0053] Figure 6 6 is a schematic diagram of the structure of the hybrid power drive system of the second embodiment of the present invention. The hybrid power drive system of this embodiment has a substantially same structure as the hybrid power drive system of the first embodiment, except that the second brake device 18 is not provided on the input shaft 12. Not providing the second brake device 18 is beneficial to reducing system complexity and cost. Please refer to the first embodiment for the structure of the hybrid power drive system, which will not be described in detail here.

[0054] Figure 7 Schematic diagram of the levers of the hybrid drive system of the second embodiment of the present invention in the pure electric first gear mode. Figure 7 As shown, in the pure electric first gear mode, the clutch 16 is disengaged, the first brake device 17 brakes the second sun gear 155, the engine 11 and the first motor 14 do not work, and the second motor 20 drives. In this working mode, the transmission ratio of the transmission mechanism composed of the ring gear 153, the second sun gear 155, and the second planetary carrier 156 is (i 02 is the gear ratio between the ring gear 153 and the second sun gear 155), and operating in the pure electric first gear mode can obtain better power than the pure electric second gear mode.

[0055] Figure 8 Schematic diagram of the lever of the hybrid drive system of the second embodiment of the present invention in the pure electric second gear mode. Figure 8 As shown, in the pure electric second gear mode, the clutch 16 is engaged, the first brake device 17 unlocks the second sun gear 155, the engine 11 and the first motor 14 do not work, and the second motor 20 drives. In this working mode, the transmission ratio of the transmission mechanism composed of the ring gear 153, the second sun gear 155, and the second planetary carrier 156 is 1, and some medium and high speed sections work in this pure electric second mode to obtain better economy than the pure electric first gear.

[0056] Fig. 9 FIG. 2 is a schematic diagram of a lever of a hybrid power drive system according to a second embodiment of the present invention in a power split hybrid first gear mode. Fig. 9As shown, in the power split hybrid first gear mode, the clutch 16 is disengaged, the first brake device 17 brakes the second sun gear 155, and the engine 11 is driven and the first motor 14 and / or the second motor 20 are driven (generating electricity or driving wheels according to the working conditions). Under the medium and small throttle conditions, the first motor 14 generates electricity and the second motor 20 assists in driving the wheels; under the throttle condition, the first motor 14 and the second motor 20 both drive the wheels. In this working mode, the transmission ratio of the transmission mechanism composed of the ring gear 153, the second sun gear 155, and the second planetary carrier 156 is (i 02 is the gear ratio between the ring gear 153 and the second sun gear 155), and operating in the power-split hybrid first gear mode can obtain better power than the power-split hybrid second gear mode.

[0057] Fig.10 FIG. 2 is a schematic diagram of the levers of the hybrid power drive system of the second embodiment of the present invention in the power split hybrid second gear mode. Fig.10 As shown, in the power split hybrid second gear mode, the clutch 16 is engaged, the first brake device 17 unlocks the second sun gear 155, and the engine 11 is driven and the first motor 14 and / or the second motor 20 are driven (power generation or driving wheels are selected according to the remaining power of the power battery). In this working mode, the transmission ratio of the transmission mechanism composed of the ring gear 153, the second sun gear 155, and the second planetary carrier 156 is 1, and some vehicle speed sections can obtain better power performance than the power split hybrid first gear mode when working in the power split hybrid second gear mode.

[0058] The above working modes are specifically reflected in the table as follows:

[0059]

[0060] In summary, the overall structure of the hybrid power drive system of the present invention is relatively simple and compact, and is easy to arrange. It can realize the pure electric first gear mode, the pure electric second gear mode, the power split hybrid first gear mode and the power split hybrid second gear mode, and switch the working mode according to the vehicle speed and the torque demand of the whole vehicle, so as to obtain better power and economy. Moreover, the power split hybrid of the hybrid power drive system of the present invention has two gears, and the working mode is switched according to the vehicle speed and the torque demand of the whole vehicle, so as to obtain better power and economy.

[0061] Furthermore, the present invention also provides a vehicle, comprising the above hybrid drive system. The above implementation is only an example of the present invention, and is not intended to limit the implementation and scope of the present invention. All equivalent changes and modifications made according to the content described in the protection scope of the patent application of the present invention should be included in the patent protection scope of the present invention.

Claims

1. A hybrid power drive system, characterized in that: The invention comprises an engine (11), an input shaft (12), a transmission shaft (13), a first motor (14), a planetary gear device (15), a clutch (16), a first brake device (17), an intermediate shaft (19), a second motor (20) and a differential (21); the planetary gear device (15) comprises a first sun gear (151), a first planet carrier (152), a ring gear (153), a second sun gear (155) and a second planet carrier (156); the first planet carrier (152) is provided with a first planetary gear (154); the second planet carrier (156) is provided with a second planetary gear (157); the ring gear (153) is meshed with the first planetary gear (154) and the second planetary gear (157), respectively; wherein: The engine (11) is connected to the input shaft (12), the first planet carrier (152) is fixed on the input shaft (12), the first motor (14) is connected to the first sun gear (151), and the second sun gear (155) is fixed on the transmission shaft (13); The second planet carrier (156) is connected to the intermediate shaft (19); The second motor (20) is connected to the intermediate shaft (19); The intermediate shaft (19) is connected to the differential (21); The clutch (16) is used to engage or disengage the second sun gear (155) and the ring gear (153); the first brake device (17) is connected to the transmission shaft (13); the first brake device (17) is used to brake or unlock the second sun gear (155); the hybrid drive system has a pure electric first gear mode and a pure electric second gear mode; in the pure electric first gear mode, the clutch (16) is disengaged and the first brake device (17) brakes the second sun gear (155); in the pure electric second gear mode, the clutch (16) is engaged and the first brake device (17) is disengaged.

2. The hybrid drive system according to claim 1, characterized in that: The hybrid drive system further comprises a second brake device (18), wherein the second brake device (18) is connected to the input shaft (12), and the second brake device (18) is used for braking or unlocking the first planet carrier (152).

3. The hybrid drive system according to claim 1 or 2, characterized in that: A first gear (191) and a second gear (192) are fixedly provided on the intermediate shaft (19), a differential gear (211) is provided on the differential (21), the first gear (191) and the second planet carrier (156) are meshed with each other, and the second gear (192) and the differential gear (211) are meshed with each other.

4. The hybrid drive system according to claim 3, characterized in that: The second motor (20) has a second motor output shaft (201), a third gear (202) is fixedly provided on the second motor output shaft (201), and the third gear (202) and the first gear (191) are meshed with each other.

5. The hybrid drive system according to claim 1 or 2, characterized in that: The first motor (14) comprises a first housing (141), a first motor stator (142) and a first motor rotor (143); the first motor stator (142) is connected inside the first housing (141); the first motor stator (142) and the first motor rotor (143) are arranged opposite to each other; and the first motor rotor (143) is fixed on the first planetary carrier (152).

6. The hybrid drive system according to claim 1, characterized in that: In the pure electric first gear mode, the second motor (20) is used for driving; in the pure electric second gear mode, the second motor (20) is used for driving.

7. The hybrid drive system according to claim 1, characterized in that: The hybrid drive system has a power split hybrid first gear mode and a power split hybrid second gear mode. In the power split hybrid first gear mode, the clutch (16) is disengaged, the first brake device (17) brakes the second sun gear (155), and is driven by the engine (11) and the first motor (14) and / or the second motor (20); in the power split hybrid second gear mode, the clutch (16) is engaged, the first brake device (17) unlocks the second sun gear (155), and is driven by the engine (11) and the first motor (14) and / or the second motor (20).

8. The hybrid drive system according to claim 2, characterized in that: The hybrid drive system has a pure electric first gear mode and a pure electric second gear mode. In the pure electric first gear mode, the clutch (16) is disengaged, the first brake device (17) brakes the second sun gear (155), and the second brake device (18) brakes the first planetary carrier (152), and is driven by the first motor (14) and / or the second motor (20); in the pure electric second gear mode, the clutch (16) is engaged, the first brake device (17) unlocks the second sun gear (155), and the second brake device (18) brakes the first planetary carrier (152), and is driven by the first motor (14) and / or the second motor (20).

9. The hybrid drive system according to claim 2, characterized in that: The hybrid drive system has a power split hybrid first gear mode and a power split hybrid second gear mode. In the power split hybrid first gear mode, the clutch (16) is disengaged, the first brake device (17) brakes the second sun gear (155), and the second brake device (18) unlocks the first planetary carrier (152), and is driven by the engine (11) and the first motor (14) and / or the second motor (20); in the power split hybrid second gear mode, the clutch (16) is engaged, the first brake device (17) unlocks the second sun gear (155), and the second brake device (18) unlocks the first planetary carrier (152), and is driven by the engine (11) and the first motor (14) and / or the second motor (20).

10. A vehicle comprising the hybrid drive system according to any one of claims 1 to 9.

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