Driving system and vehicle

Abstract

The utility model relates to a driving system and a vehicle. The driving system comprises an engine; the first motor can generate electricity under the driving of the engine; the second motor is used for outputting power; and the Ravigneaux planet row is connected to the engine and is used for outputting power. The first motor is driven by the engine to generate power, can directly supply power to the second motor or store the power in the battery pack, so that the power guarantee performance of the battery can be improved, the second motor can continuously output power independently or together with the engine, and the problem that oil consumption is increased due to frequent driving of the engine, low-efficiency parallel power generation and the like is solved.

Description

Technical Field

[0001] This disclosure relates to the field of drive system technology, and more specifically, to a drive system and a vehicle. Background Technology

[0002] Hybrid power systems are commonly used in vehicles to meet the demand for different power levels and performance. A hybrid system typically includes an engine, an electric motor, transmission gears, and a planetary gear set. In related technologies, hybrid systems based on Ravenel planetary gear sets usually include one engine and one electric motor, capable of outputting power individually or jointly. However, this single-motor hybrid technology cannot achieve series operation. That is, when the electric motor is driving the vehicle, the battery's charge retention capacity is insufficient, unable to charge the battery or supply power to the motor in real time. When the battery is depleted, the engine drives the vehicle. Parallel power generation efficiency is low, resulting in higher fuel consumption. Utility Model Content

[0003] The purpose of this disclosure is to provide a drive system and vehicle that at least partially solves the problems existing in the related art.

[0004] To achieve the above objectives, this disclosure provides a driving system, comprising:

[0005] engine;

[0006] The first motor is capable of generating electricity when driven by the engine;

[0007] A second motor, used for power output; and

[0008] The Ravina planetary gear set is connected to the engine and used for power output.

[0009] Optionally, the Ravina planetary gear set includes a planet carrier, a first planet gear and a second planet gear mounted on the planet carrier, a ring gear, a first sun gear, and a second sun gear, wherein the first planet gear is meshed between the first sun gear and the second planet gear, the second planet gear is meshed between the second sun gear and the ring gear, and the ring gear is used for power output.

[0010] Optionally, it also includes:

[0011] A clutch assembly that selectively engages the engine's output shaft with the planetary carrier and selectively engages the output shaft with the first sun gear; and

[0012] The brake assembly includes a first brake for selectively locking the second sun gear.

[0013] Optionally, the brake assembly further includes a second brake for selectively locking the planetary carrier.

[0014] Optionally, the first motor has a rotor, and the clutch assembly is coaxially built into the internal cavity of the rotor.

[0015] Optionally, the clutch assembly includes a first clutch and a second clutch, the first clutch selectively engaging the output shaft with the planet carrier, and the second clutch selectively engaging the output shaft with the first sun gear.

[0016] Optionally, the engine, the first motor, the clutch assembly, the brake assembly, and the planetary gear assembly are coaxially arranged.

[0017] Optionally, it also includes:

[0018] A first drive shaft, one end of which is connected to the planetary carrier, and the other end of which is connected to the output shaft via the clutch assembly; and

[0019] The second drive shaft is connected at one end to the first sun gear and at the other end to the output shaft via the clutch assembly.

[0020] Optionally, the second drive shaft is coaxially loosely fitted onto the first drive shaft, the first sun gear is coaxially loosely fitted onto the first drive shaft and fixedly connected to the second drive shaft, and the second sun gear is coaxially loosely fitted onto the second drive shaft.

[0021] Optionally, the first planetary gear is meshed with the second planetary gear at one end in the axial direction, and the second sun gear is meshed with the second planetary gear at the other end in the axial direction.

[0022] Optionally, it further includes a drive half-shaft and an intermediate shaft connected to the drive half-shaft via a gear set, wherein the gear ring and the second motor are respectively connected to the intermediate shaft.

[0023] Optionally, it also includes:

[0024] A direct-drive gear is coaxially connected to the gear ring, and the gear ring is connected to the intermediate shaft through the direct-drive gear;

[0025] A first gear is disposed on the intermediate shaft and connected to the direct drive gear; and

[0026] The second gear is connected to the second motor and meshes with the first gear.

[0027] Optionally, it also includes a torsional damper disposed on the output shaft of the engine.

[0028] Optionally, the output shaft of the engine is directly connected to the rotor of the first motor.

[0029] According to a second aspect of this disclosure, a vehicle is provided, including the drive system described above.

[0030] Through the above technical solution, when the engine is running, its output shaft, in addition to driving the Ravina planetary gear set to output power, can also simultaneously drive the first motor to generate electricity, which can then directly power the second motor. Alternatively, when this drive system is used in a vehicle with a battery pack, the electrical energy generated by the first motor can also be stored in the battery pack for use by the second motor (indirect power supply). Specifically, when the first motor generates electricity and the second motor outputs power simultaneously, this is a series mode; when the first motor generates electricity and the second motor does not output power, this is a stationary power generation mode. Compared to traditional drive systems based on the Ravina planetary gear set, this design improves battery power retention, ensuring that the second motor can continuously output power independently or jointly with the engine, avoiding the problems of increased fuel consumption caused by the engine frequently relying on the Ravina planetary gear set for drive due to battery pack depletion and inefficient parallel power generation.

[0031] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0033] Figure 1 This is a schematic diagram of a first type of drive system exemplarily shown according to this disclosure;

[0034] Figure 2 yes Figure 1 The diagram shown illustrates the drive system in low-speed operation.

[0035] Figure 3 yes Figure 1 The diagram shown is a schematic of the drive system in first gear.

[0036] Figure 4 yes Figure 1 The diagram shown is a schematic of the drive system in second gear.

[0037] Figure 5 yes Figure 1 The diagram shown is a schematic of the drive system under three gear conditions;

[0038] Figure 6 This is a schematic diagram of a second type of drive system exemplarily shown according to this disclosure;

[0039] Figure 7This is a schematic diagram of a third drive system exemplarily shown according to this disclosure.

[0040] Explanation of reference numerals in the attached figures

[0041] 1-Drive half-shaft; 10-Intermediate shaft; 2-Engine; 21-Output shaft; 31-First motor; 301-Rotor; 32-Second motor; 4-Ravina planetary gear set; 401-Planet carrier; 402-Ring gear; 403-Second planetary gear; 404-First planetary gear; 405-First sun gear; 406-Second sun gear; 407-Direct drive gear; 5-Clutch assembly; 501-First clutch; 502-Second clutch; 6-Brake assembly; 601-First brake; 602-Second brake; 71-First drive shaft; 72-Second drive shaft; 81-Torsive damper; 82-Differential; 91-First gear; 92-Second gear; 93-Third gear; 94-Fourth gear. Detailed Implementation

[0042] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0043] In this disclosure, the terms "first," "second," etc., are used to distinguish one element from another and do not indicate any order or importance. When the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0044] Reference Figures 1-7 This disclosure exemplarily illustrates a drive system including an engine 2, a first motor 31 capable of generating electricity driven by the engine 2, a second motor for power output, and a Ravenna planetary gear set 4 connected to the engine 2. The first motor 31 can supply power to the second motor 32, either directly or indirectly through a battery pack. The second motor 32 and the Ravenna planetary gear set 4 can either output power individually or simultaneously. Here, "power output" refers to the drive system outputting power to the outside, for example, through the drive half-shaft 1 mentioned below. The second motor 32 can directly receive electrical energy from the first motor 31, or it can receive it indirectly through the battery pack.

[0045] The Ravina planetary gear set 4 refers to a planetary gear set assembly that includes two sun gears and two rows of planet gears, with the two rows of planet gears sharing a single gear ring and planet carrier. Since its structure and principle are well known to those skilled in the art, they will not be described in detail here.

[0046] In the embodiments of this disclosure, the Ravina planetary gear set 4 being connected to the engine 2 refers to being connected to the output shaft 21 of the engine 2. Specifically, the output shaft 21 of the engine 2 can refer to the crankshaft of the engine, or it can refer to a shaft segment connected to the crankshaft, and its function is to output the torque of the engine 2 outward. The first motor 31 being connected to the output shaft 21 means that its rotor is connected to the output shaft 21, so that it can rotate with the output shaft 21 to generate electricity. Of course, in addition to generating electricity, the first motor 31 can also be used for power output, and this disclosure does not limit this. Similarly, the second motor 32, in addition to power output, can also generate electricity under the drive of the engine 2, as will be described in detail below.

[0047] By using the above technical solution, when engine 2 is working, its output shaft 21 can not only drive the Ravina planetary gear set to output power, but also simultaneously drive the first motor 31 to generate electricity, which can then directly power the second motor 32. Alternatively, when this drive system is used in a vehicle with a battery pack, the electrical energy generated by the first motor 31 can also be stored in the battery pack for use by the second motor 32 (indirect power supply). Specifically, when the first motor 31 generates electricity and the second motor 32 simultaneously outputs power, it is in series mode; when the first motor 31 generates electricity and the second motor 32 does not output power, it is in-situ power generation mode. Compared to traditional drive systems based on the Ravina planetary gear set, this design improves battery power retention performance, ensuring that the second motor 32 can continuously output power independently or jointly with engine 2, avoiding the problems of frequent engine drive via the Ravina planetary gear set due to battery pack depletion and increased fuel consumption caused by inefficient parallel power generation.

[0048] Reference Figures 1-7 In the embodiments disclosed herein, the Ravina planetary gear set 4 may include a planet carrier 401, a first planetary gear 404 and a second planetary gear 403 mounted on the planet carrier 401, a ring gear 402, a first sun gear 405, and a second sun gear 406. The first planetary gear 404 is meshed between the first sun gear 405 and the second planetary gear 403, and the second planetary gear 403 is meshed between the second sun gear 406 and the ring gear 402. The ring gear 402 is used for power output. In the Ravina planetary gear set 4 described above, the first planetary gear 404 and the second planetary gear 403 can rotate relative to the planet carrier 401, and can revolve around the first sun gear 405 or the second sun gear 406 under the action of the planet carrier 401. Since the structure and working principle of the Ravina planetary gear set are well known to those skilled in the art, they will not be described in detail here.

[0049] The drive system can operate in multiple modes: it can output power solely through engine 2 driving the Ravina planetary gear set 4 (direct drive mode); it can output power solely through the second motor 32 (pure electric mode); or it can output power through both engine 2 driving the Ravina planetary gear set 4 and the second motor 32 (parallel mode). When engine 2 drives the Ravina planetary gear set 4, multiple gears can be output by adjusting the locking relationship between the components of the Ravina planetary gear set 4 through the brake and clutch assemblies.

[0050] Among related technologies, hybrid technology still has a problem: its high-speed gear ratio is too large, the vehicle's top speed is too low, high-speed / ultra-high-speed engine noise is high, and fuel consumption is high, which does not meet the performance requirements of high-performance hybrid vehicles. To address this technical problem, refer to... Figures 1-7 In embodiments of this disclosure, the drive system may further include a clutch assembly 5 and a brake assembly 6. The clutch assembly 5 can selectively engage the output shaft 21 of the engine 2 with the planetary carrier 401 and selectively engage the output shaft 21 with the first sun gear 405. The brake assembly 6 may include a first brake 601 for selectively locking the second sun gear 406. This design enables three-speed transmission (1st / 2nd / 3rd gear) when the engine 2 is driven. It can be a direct drive mode for the engine 2 or a parallel mode in conjunction with the second motor 32. Specifically:

[0051] 1st gear: Refer to Figure 3 In this mode, the clutch assembly 5 controls the output shaft 21 to engage with the first sun gear 405, and the first brake 601 locks the second sun gear 406.

[0052] 2nd gear, refer to Figure 4 In this mode, the clutch assembly 5 controls the output shaft 21 to engage with the first sun gear 405 and the planet carrier 401 respectively, and the first brake 601 does not participate in braking;

[0053] 3rd gear, see reference Figure 5 In this mode, the clutch assembly 5 controls the output shaft 21 to engage with the planetary carrier 401, and the first brake 601 locks the second sun gear 406.

[0054] In 3rd gear, the Ravina planetary gear set 4 can achieve the minimum gear ratio (i=K1 / (1+K1), where k1 is the ratio of the number of teeth of the ring gear 402 to the number of teeth of the second sun gear 406), thus making it easier to achieve ultra-high speeds and meet the ultra-high speed requirements of high-performance vehicles. At high speeds, the engine 2 rotates at a lower speed, which can achieve lower high-speed noise and better high-speed fuel consumption in high-performance vehicles.

[0055] Reference Figures 1-6In embodiments of this disclosure, the brake assembly 6 may further include a second brake 602, which is used to selectively lock the planetary carrier 401. By providing the second brake 602, the drive system can be equipped with a low-speed mode compared to the above embodiments. Specifically:

[0056] Low gear: Refer to Figure 2 In this mode, the clutch assembly 5 controls the output shaft 21 to engage with the first sun gear 405, and the second brake 602 locks the planetary carrier 401. The gear ratio in this mode is lower than that of the first gear mentioned above, and it is suitable for low-speed direct drive of the engine.

[0057] It should be noted that, in Figures 1-6 The illustrated embodiment includes a first brake 601 and a second brake 602, which will be mentioned below. Figure 7 In the illustrated embodiment, only the first brake 601 is included.

[0058] Reference Figures 1-5 , Figure 7 In the embodiments of this disclosure, the first motor 31 may have a rotor 301, and the clutch assembly 5 may be coaxially built into the internal cavity of the rotor 301, that is, the rotor 301 of the first motor 31 may be arranged around the clutch assembly 5. This design results in higher integration, making the drive system structure more compact, shortening the axial dimension of the system, and facilitating its arrangement in the engine compartment of a hybrid vehicle. Furthermore, in Figure 6 In the illustrated embodiment, the clutch assembly 5 may also be separate from the rotor of the first motor 31, i.e., a separate design, which is not a limitation of this disclosure.

[0059] In embodiments of this disclosure, the clutch assembly 5 may include a first clutch 501 and a second clutch 502. The first clutch 501 may selectively engage the output shaft 21 with the planetary carrier 401. The second clutch 502 may selectively engage the output shaft 21 with the first sun gear 405.

[0060] In the embodiments of this disclosure, the engine 2, the first motor 31, the clutch assembly 5, the brake assembly 6, and the Ravenna planetary gear set 4 can be arranged coaxially, that is, the centerlines of the aforementioned components coincide. This design helps to reduce the radial dimension waste of the drive system, making the radial structure of the drive system compact and facilitating its arrangement in the engine compartment of a hybrid vehicle.

[0061] To establish a transmission connection between the Ravina planetary gear set 4 and engine 2, and to transfer the power output of engine 2, refer to... Figures 1-7In the embodiments disclosed herein, the drive system may further include: a first drive shaft 71, one end of which is connected to the planetary carrier 401 and the other end of which is connected to the output shaft 21 via a clutch assembly 5, specifically via a first clutch 501; and a second drive shaft 72, one end of which is connected to the first sun gear 405 and the other end of which is connected to the output shaft 21 via a clutch assembly 5, specifically via a second clutch 502.

[0062] To make the overall structure of the drive system compact, refer to Figures 1-7 In the embodiments disclosed herein, the second drive shaft 72 can be coaxially loosely fitted onto the first drive shaft 71, the first sun gear 405 can be coaxially loosely fitted onto the first drive shaft 71 and fixedly connected to the second drive shaft 72, and the second sun gear 406 can be coaxially loosely fitted onto the second drive shaft 72. This aforementioned fitted-on positional relationship allows for full utilization of space, further making the drive system structure more compact.

[0063] In order for the second planetary gear 403 to mesh and connect with the first planetary gear 404 and the second sun gear 406 respectively, refer to Figures 1-7 In embodiments of this disclosure, the first planetary gear 404 can be meshed with the second planetary gear 403 at one end in the axial direction, and the second sun gear 406 can be meshed with the second planetary gear 403 at the other end in the axial direction. In this case, the second planetary gear 403 needs to be a long planetary gear, and the first planetary gear 404 is a short planetary gear.

[0064] Reference Figures 1-7 In embodiments of this disclosure, the drive system may further include a torsional vibration damper 81 disposed on the output shaft 21 of the engine 2. Specifically, the output shaft 21 may include two parts, one part connected to the engine 2 body and the other part connected to the clutch assembly 5. The torsional vibration damper 81 is disposed between the two parts of the output shaft 21, thereby reducing the torsional vibration of the engine 2 and the transmission components in the drive system. The torsional vibration damper 81 is mainly composed of elastic elements and damping elements, etc. The spring element is used to reduce the torsional stiffness at the beginning of the transmission system, thereby reducing a certain natural frequency of the torsional system of the transmission system, changing the natural mode shape of the system, so that it can avoid the excitation caused by the main harmonic excitation of the engine torque; the damping element is used to effectively dissipate vibration energy. Since its structure and principle are well known to those skilled in the art, they will not be described in detail here.

[0065] In the embodiments of this disclosure, the output shaft 21 of the engine 2 can be directly connected to the rotor 301 of the first motor 31, so that the transmission ratio between them is 1. This design eliminates gear transmission losses, resulting in higher transmission efficiency and improving the power generation efficiency of the first motor 31.

[0066] In order to output power from the drive system, refer to Figures 1-7In embodiments of this disclosure, the drive system may further include a drive half-shaft 1 and an intermediate shaft 10 connected to the drive half-shaft 1 via a gear set. The gear ring 402 and the second motor 32 may be connected to the intermediate shaft 10 respectively, and power may be transmitted to the drive half-shaft 1 through the intermediate shaft 10. It should be noted that the "connection" here may be a direct connection or an indirect connection.

[0067] The specific transmission connection between the gear ring 402, the second motor 32, and the drive half-shaft 1 will be described below. Specifically:

[0068] Reference Figures 1-7 In embodiments of this disclosure, the drive system may further include: a direct drive gear 407, coaxially connected to the gear ring 402. This "coaxial connection" can reduce the waste of radial space while ensuring the transmission effect and improve the compactness of the overall structure. The gear ring 402 can be connected to the intermediate shaft 10 through the direct drive gear 407; a first gear 91, disposed on the intermediate shaft 10 and connected to the direct drive gear 407; and a second gear 92, connected to the second motor 32 and meshing with the first gear 91. With this design, when only engine 2 is driving (direct drive mode), the direct drive gear 407 drives the first gear 91, and the first gear 91 then transmits power to the drive half-shaft 1 through the intermediate shaft 10 and the gear set; when only the second motor 32 is driving (pure electric mode), the second motor 32 can drive the second gear 92, and the second gear 92 transmits power to the drive half-shaft 1 through the first gear 91, the intermediate shaft 10 and the gear set; when engine 2 and the second motor 32 are driving simultaneously (parallel mode), the direct drive gear 407 and the second gear 92 can jointly drive the first gear 91, and transmit power to the drive half-shaft 1 through the intermediate shaft 10 and the gear set.

[0069] Furthermore, in embodiments of this disclosure, the gear set may include: a third gear 93, coaxially connected to the first gear 91; and a fourth gear 94, meshing with the third gear 93 and connected to the drive half-shaft 1. With this design, the power of the first gear 91 can be transmitted through the third gear 93 to the fourth gear 94, and further to the drive half-shaft 1.

[0070] In embodiments of this disclosure, the drive system may further include a differential 82 disposed between the gear set and the drive half-shaft 1. By providing the differential 82, the rotational speed of the wheels connected to the drive half-shaft 1 can be adjusted, allowing the rotational speeds of the left and right wheels to be automatically adjusted according to turning requirements to maintain balance. Since the structure and principle of the differential 82 are well known to those skilled in the art, they will not be described in detail here.

[0071] To facilitate understanding of the technical solution disclosed herein, the following will refer to Table 1 and... Figures 2-5The various operating modes and gears of this drive system are described in detail:

[0072]

[0073] Table 1

[0074] 1. Pure Electric Mode:

[0075] With clutch assembly 5, first brake 601, and second brake 602 all disengaged, engine 2 and first motor 31 are not operating. Second motor 32 utilizes the power battery's energy to output power. The power from second motor 32 is transmitted through second gear 92, first gear 91, third gear 93, fourth gear 94, differential 82, and drive half-shaft 1 to achieve pure electric drive of the vehicle. This mode is suitable for vehicles with a high SOC (state of charge) of the power battery and speeds below medium to high.

[0076] 2. Series mode:

[0077] When clutch assembly 5, first brake 601, and second brake 602 are all disengaged, engine 2 drives first motor 31 to generate electricity efficiently, either to replenish the vehicle's power battery or to provide power to second motor 32. Second motor 32 utilizes the power battery or the electricity generated by first motor 31 to drive output power. The driving power path of second motor 32 is the same as in pure electric mode. This mode is suitable for operating conditions such as low vehicle power battery SOC or high vehicle power demand.

[0078] 3. Direct drive low-speed mode:

[0079] like Figure 2 As shown, when both the second clutch 502 and the second brake 602 are engaged (i.e., the engine 2 is connected to the first sun gear 405, and the planetary carrier 401 is locked), both the first clutch 501 and the first brake 601 are disengaged, and the engine 2 operates. Neither the first motor 31 nor the second motor 32 participates in the operation. At this time, the power flow of the engine 2's drive path is as follows:

[0080] Engine 2 - Output shaft 21 - Second clutch 502 - Second transmission shaft 72 - First sun gear 105 - First planetary gear 404 - Second planetary gear 403 - Ring gear 402 - Direct drive gear 407 - First gear 91 - Third gear 93 - Fourth gear 94 - Differential 82 - Drive half shaft 1, thereby realizing direct drive of the vehicle at low speeds.

[0081] This mode is suitable for situations such as when the vehicle's power battery SOC is low, when the vehicle starts up, and when it accelerates rapidly at low speeds.

[0082] 4. Direct drive 1st gear mode:

[0083] like Figure 3As shown, when both the second clutch 502 and the first brake 601 are engaged (i.e., the engine 2 is connected to the first sun gear 405, and the second sun gear 406 is locked), and both the first clutch 501 and the second brake 602 are disengaged, the engine 2 operates, and neither the first motor 31 nor the second motor 32 participates in the operation. At this time, the power flow of the engine 2's drive path is as follows:

[0084] Engine 2 - Output shaft 21 - Second clutch 502 - Second drive shaft 72 - First sun gear 405 - First planet gear 404 - Planet carrier 401, Second planet gear 403 - Ring gear 402 - Direct drive gear 407 - First gear 91 - Third gear 93 - Fourth gear 94 - Differential 82 - Drive half shaft 1, thereby realizing the vehicle's first gear direct drive.

[0085] This mode is suitable for situations such as when the vehicle's power battery SOC is low and the vehicle is accelerating rapidly at low to medium speeds.

[0086] 5. Direct drive 2-speed mode:

[0087] like Figure 4 As shown, the first clutch 501 and the second clutch 502 are engaged (i.e., the engine 2 is simultaneously connected to the first sun gear 405 and the planetary carrier 401; at this time, due to the characteristics of the Ravenna planetary gear set, the connection between the first sun gear 405 and the planetary carrier 401, i.e., the Ravenna planetary gear set 4, can participate in the transmission as a rigid whole), the first brake 601 and the second brake 602 are both disengaged, the engine 2 operates, and the first motor 31 and the second motor 32 do not participate in the operation. At this time, the power flow of the engine 2 drive path is as follows:

[0088] Engine 2 - Output shaft 21 - First clutch 501, second clutch 502 - First drive shaft 71, second drive shaft 72 - Ravina planetary gear set 4 - Direct drive gear 407 - First gear 91 - Third gear 93 - Fourth gear 94 - Differential 82 - Drive half shaft 1, thereby realizing the vehicle's 2nd gear direct drive.

[0089] This mode is suitable for situations such as when the vehicle's power battery SOC is low, when the vehicle is accelerating rapidly at low to medium speeds, or when it is operating at high speeds.

[0090] 6. Direct drive 3-speed mode:

[0091] like Figure 5 As shown, the first clutch 501 and the first brake 601 are engaged (i.e., the engine 2 is connected to the planetary carrier 401, and the second sun gear 406 is locked), while the second clutch 502 and the second brake 602 are both disengaged. The engine 2 operates, and neither the first motor 31 nor the second motor 32 participates in the operation. At this time, the power flow of the engine 3's drive path is as follows:

[0092] Engine 2 - Output shaft 21 - First clutch 501 - First drive shaft 71 - Planetary carrier 401 - Second planetary gear 403 - Ring gear 402 - Direct drive gear 407 - First gear 91 - Third gear 93 - Fourth gear 94 - Differential 82 - Drive half shaft 1, thereby realizing 4-speed direct drive of the vehicle.

[0093] This mode is suitable for situations such as when the vehicle's power battery has a low SOC, when the vehicle is accelerating at high speeds, or when it is operating at ultra-high speeds.

[0094] 7. Parallel mode:

[0095] In parallel mode, the clutch and brake control logic for each gear and the power flow of engine 2 are the same as in direct drive mode. Depending on the vehicle's battery SOC and power demand, the second motor 32 participates in parallel power generation or parallel drive. Specifically, when the battery SOC is high and power demand is high, such as during hill climbing or rapid acceleration, the second motor 32 engages in parallel drive to improve vehicle performance and allow the engine to operate in its most efficient range. When the battery SOC is low, under direct drive conditions at higher speeds, the second motor 32 engages in parallel power generation to replenish the battery's energy.

[0096] On-site power generation mode:

[0097] When the vehicle's power battery is low and the vehicle is parked, the clutch assembly 5 and both brakes are disengaged, the second motor 32 does not work, and the engine 2 drives the first motor 31 to generate electricity, quickly replenishing the vehicle's power battery.

[0098] According to a second aspect of this disclosure, a vehicle is provided that includes the aforementioned drive system, the advantages of which will not be elaborated upon here.

[0099] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0100] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0101] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A drive system, characterized in that, include: engine; The first motor is capable of generating electricity when driven by the engine; The second motor is used for power output; as well as The Ravina planetary gear set is connected to the engine and used for power output.

2. The drive system according to claim 1, characterized in that, The Ravina planetary gear set includes a planet carrier, a first planet gear and a second planet gear mounted on the planet carrier, a ring gear, a first sun gear, and a second sun gear. The first planet gear is meshed between the first sun gear and the second planet gear, and the second planet gear is meshed between the second sun gear and the ring gear. The ring gear is used for power output.

3. The drive system according to claim 2, characterized in that, Also includes: The clutch assembly selectively engages the engine's output shaft with the planetary carrier and selectively engages the output shaft with the first sun gear; as well as The brake assembly includes a first brake for selectively locking the second sun gear.

4. The drive system according to claim 3, characterized in that, The brake assembly also includes a second brake for selectively locking the planetary carrier.

5. The drive system according to claim 3, characterized in that, The first motor has a rotor, and the clutch assembly is coaxially built into the internal cavity of the rotor.

6. The drive system according to claim 3, characterized in that, The clutch assembly includes a first clutch and a second clutch, the first clutch selectively engaging the output shaft with the planet carrier, and the second clutch selectively engaging the output shaft with the first sun gear.

7. The drive system according to any one of claims 3-6, characterized in that, The engine, the first motor, the clutch assembly, the brake assembly, and the Ravina planetary gear set are arranged coaxially.

8. The drive system according to claim 7, characterized in that, Also includes: The first drive shaft has one end connected to the planetary carrier and the other end connected to the output shaft via the clutch assembly; as well as The second drive shaft is connected at one end to the first sun gear and at the other end to the output shaft via the clutch assembly.

9. The drive system according to claim 8, characterized in that, The second drive shaft is coaxially loosely fitted onto the first drive shaft, the first sun gear is coaxially loosely fitted onto the first drive shaft and fixedly connected to the second drive shaft, and the second sun gear is coaxially loosely fitted onto the second drive shaft.

10. The drive system according to claim 2, characterized in that, The first planetary gear is meshed with the second planetary gear at one end in the axial direction, and the second sun gear is meshed with the second planetary gear at the other end in the axial direction.

11. The drive system according to claim 2, characterized in that, It also includes a drive half-shaft and an intermediate shaft connected to the drive half-shaft via a gear set, with the gear ring and the second motor respectively connected to the intermediate shaft.

12. The drive system according to claim 11, characterized in that, Also includes: A direct-drive gear is coaxially connected to the gear ring, and the gear ring is connected to the intermediate shaft through the direct-drive gear; The first gear is disposed on the intermediate shaft and connected to the direct drive gear; as well as The second gear is connected to the second motor and meshes with the first gear.

13. The drive system according to claim 1, characterized in that, It also includes a torsional damper disposed on the output shaft of the engine.

14. The drive system according to claim 1, characterized in that, The output shaft of the engine is directly connected to the rotor of the first motor.

15. A vehicle, characterized in that, The drive system included in any one of claims 1-14.

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