Multi-mode hybrid transmission drive system of automobile and automobile

Abstract

The application discloses a multi-mode hybrid variable speed driving system of an automobile and the automobile. The multi-mode hybrid variable speed driving system comprises a power supply device, a power transmission device and a power control device. The power supply device comprises an engine, a first motor and a second motor. The power transmission device comprises a first planetary gear set and a second planetary gear set. The power control device comprises a brake and a clutch. In the multi-mode hybrid variable speed driving system of the automobile, the six driving modes of power split mode, traditional mode, parallel mode, single motor pure electric mode, double motor pure electric mode and energy recovery mode can be realized by controlling the closing and opening of the brake and the clutch, and the phenomenon of power backflow can be avoided when the automobile is high-speed driven in the power split mode state through the switching among the modes, so that the efficiency of the multi-mode hybrid variable speed driving system of the automobile is improved, and the system fuel consumption is reduced.

Description

Technical Field

[0001] This invention relates to the automotive field, and more particularly to a multi-mode hybrid transmission drive system and an automobile. Background Technology

[0002] Hybrid transmissions come in various structures, and some are designed based on traditional transmissions. Currently, there are three main types of hybrid transmissions on the market: 1. Based on a DCT (dual-clutch) transmission with an added electric motor; 2. Based on a CVT (continuously variable transmission) with an added electric motor; and 3. Based on an AT (automatic transmission) with an added electric motor. In addition, there are hybrid transmissions based on power-split mechanisms and dual-motor hybrid transmissions based on planetary gear sets. Power-split hybrid transmissions can effectively adjust the engine's operating point at low speeds, but at high speeds, power recirculation occurs, reducing system efficiency and resulting in poor fuel economy at high speeds.

[0003] Therefore, existing hybrid transmission drive systems are prone to power backflow when the vehicle is traveling at high speeds. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of power backflow that easily occurs in existing hybrid transmission drive systems when the vehicle is traveling at high speed.

[0005] To address the aforementioned problems, one embodiment of the present invention provides a multi-mode hybrid transmission drive system for automobiles, including a power supply device, a power transmission device, and a power control device. The power supply device includes an engine, a first electric motor, and a second electric motor. The power transmission device includes a first planetary gear set and a second planetary gear set. The power control device includes a brake and a clutch.

[0006] The first planetary gear set includes a first ring gear, a first sun gear, and a first planetary assembly disposed between the first ring gear and the first sun gear. The second planetary gear set includes a second ring gear, a second sun gear, and a second planetary assembly disposed between the second ring gear and the second sun gear. In the first planetary gear set, the first ring gear is driven to the output end of the engine via a first drive shaft, the planet carrier of the first planetary assembly is driven to the system output shaft via a second drive shaft, and the first sun gear is driven to the first motor via a third drive shaft. In the second planetary gear set, the second sun gear is driven to the output end of the engine via a first drive shaft, and the planet carrier of the second planetary assembly is driven to the system output shaft via a second drive shaft. The second motor is driven to the output shaft via a fourth drive shaft. A clutch is disposed on the second drive shaft for selectively connecting or disconnecting the power transmission between the system output shaft and the planet carriers of the first and second planetary assemblies. A brake is disposed on the second ring gear for selectively braking the second ring gear.

[0007] Using the above technical solution, the engine can provide power to the vehicle's multi-mode hybrid transmission drive system, and the first and second motors can respectively provide power to the system or recover energy. The power transmission device is used for power transmission, and the power control device is used to control the direction of power flow. In this vehicle's multi-mode hybrid transmission drive system, six driving modes can be achieved by controlling the engagement and disengagement of the brakes and clutches: power-split mode, conventional mode, parallel mode, single-motor pure electric mode, dual-motor pure electric mode, and energy recovery mode. By switching between modes, the power-split mode is used when the vehicle is traveling at low speeds to better adjust the engine's operating point; the parallel mode is used when the vehicle is traveling at high speeds to avoid power backflow when traveling at high speeds in power-split mode, thereby improving system efficiency and reducing fuel consumption. Therefore, this vehicle's multi-mode hybrid transmission drive system has the advantage of avoiding power backflow problems. Furthermore, the system can adjust the drive system mode according to the vehicle's actual driving conditions to ensure the vehicle is in the optimal energy supply mode. Furthermore, the vehicle's multi-mode hybrid transmission system can also recover energy, thereby improving the system's energy utilization rate. Therefore, the vehicle's multi-mode hybrid transmission system also has the advantages of high efficiency and high energy utilization rate.

[0008] According to another specific embodiment of the present invention, a multi-mode hybrid transmission drive system for automobiles disclosed in the present invention further includes a one-way clutch, and the one-way clutch is disposed at the output end of the engine.

[0009] By adopting the above technical solution, the one-way clutch can restrict the free rotation of the engine to avoid affecting the power input in the system when the engine rotates freely, thereby further improving the efficiency and energy utilization of the multi-mode hybrid transmission drive system of the vehicle.

[0010] According to another specific embodiment of the present invention, a multi-mode hybrid transmission drive system for automobiles disclosed in the present invention further includes a battery, which is electrically connected to a first motor and a second motor respectively.

[0011] By adopting the above technical solution, the battery can supply power to the first motor and the second motor respectively, so that when the first motor and / or the second motor need to supply power, the battery can drive the first motor and / or the second motor to supply power to the multi-mode hybrid transmission drive system of the vehicle. The battery can also recover excess energy in the multi-mode hybrid transmission drive system through the first motor and / or the second motor, thereby improving the energy utilization rate of the multi-mode hybrid transmission drive system of the vehicle and improving the fuel saving capability of the vehicle.

[0012] According to another specific embodiment of the present invention, a multi-mode hybrid transmission drive system for automobiles is disclosed in this embodiment. The power transmission device further includes an intermediate transmission device disposed between the system output shaft and the differential of the automobile. The intermediate transmission device includes an intermediate shaft and an intermediate gear disposed on the intermediate shaft. One side of the intermediate gear meshes with the output gear of the system output shaft, and the other side meshes with the differential drive gear of the differential.

[0013] By adopting the above technical solution, the system output shaft transmits energy between the intermediate transmission device and the differential, thereby transferring the energy delivered by the multi-mode hybrid transmission drive system of the vehicle to the vehicle wheels via the differential, or transferring excess energy from the vehicle wheels back to the multi-mode hybrid transmission drive system via the differential and storing it in the battery, thereby improving the energy utilization rate of the multi-mode hybrid transmission drive system of the vehicle and improving the vehicle's fuel efficiency.

[0014] According to another specific embodiment of the present invention, a multi-mode hybrid transmission drive system for automobiles is disclosed. The intermediate gear includes a first intermediate gear disposed on one side of the intermediate shaft and a second intermediate gear disposed on the other side of the intermediate shaft. The first intermediate gear meshes with the output gear of the system output shaft, the second intermediate gear meshes with the differential drive gear, and the two sides of the differential output end are respectively connected to the wheels on both sides of the automobile via two half-shafts.

[0015] According to another specific embodiment of the present invention, a multi-mode hybrid transmission drive system for automobiles is disclosed. A first planetary assembly includes a first planet carrier and at least three first planetary gears. The at least three first planetary gears are evenly and spaced apart on the first planet carrier and fixedly connected to it. Each first planetary gear meshes with a first ring gear and a first sun gear, respectively. A second planetary assembly includes a second planet carrier and at least three second planetary gears. The at least three second planetary gears are evenly and spaced apart on the second planet carrier and fixedly connected to it. Each second planetary gear meshes with a second ring gear and a second sun gear, respectively.

[0016] Using the above technical solution, the first sun gear can transmit energy to the first planetary carrier through the first planetary gears, and the second sun gear or the second ring gear can transmit energy to the second planetary carrier through the second planetary gears. Furthermore, the first and second planetary carriers rotate synchronously, so that the energy output by the first and / or second planetary carriers is transmitted to the system output shaft through the second drive shaft.

[0017] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a multi-mode hybrid transmission drive system for automobiles, wherein a first planetary assembly and a second planetary assembly are arranged side by side in the transmission of the automobile.

[0018] By adopting the above technical solution, this configuration can save space within the gearbox occupied by the first and second planetary gear components, thereby reducing the space occupied by the multi-mode hybrid transmission drive system. Furthermore, this configuration also facilitates energy transfer between the first and second planetary gear components.

[0019] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a multi-mode hybrid transmission drive system for automobiles, wherein in the automobile's transmission, the output gear of the second motor is located on the opposite side of the first planetary assembly and the second planetary assembly relative to the system output shaft.

[0020] By adopting the above technical solution, this configuration can make the structure of the multi-mode hybrid transmission drive system more compact, thereby further reducing the space occupied by the multi-mode hybrid transmission drive system of the vehicle.

[0021] One embodiment of the present invention also provides a vehicle including any of the above-described vehicle multi-mode hybrid transmission drive systems.

[0022] By adopting the above technical solution, the multi-mode hybrid transmission drive system of this vehicle employs a power-split mode when the vehicle is traveling at low speeds to better adjust the engine's operating point; and a parallel mode when the vehicle is traveling at high speeds to avoid power backflow that occurs when the vehicle is traveling at high speeds in power-split mode, thereby improving system efficiency and reducing fuel consumption. Furthermore, by switching the drive modes of the multi-mode hybrid transmission drive system, the vehicle can maintain its optimal energy supply mode under different driving conditions. The multi-mode hybrid transmission drive system can also perform energy recovery, thereby improving the vehicle's energy utilization rate. Therefore, this vehicle has the advantages of avoiding power backflow problems and achieving high energy utilization efficiency.

[0023] The beneficial effects of this invention are:

[0024] The multi-mode hybrid transmission drive system for automobiles provided by this invention includes an engine that provides power to the system, and a first motor and a second motor that respectively provide power or recover energy. A power transmission device is used for power transmission, and a power control device is used to control the direction of power flow. In this multi-mode hybrid transmission drive system, six driving modes can be achieved by controlling the engagement and disengagement of the brakes and clutch: power-split mode, conventional mode, parallel mode, single-motor pure electric mode, dual-motor pure electric mode, and energy recovery mode. By switching between modes, the power-split mode is used when the vehicle is traveling at low speeds to better adjust the engine's operating point; the parallel mode is used when the vehicle is traveling at high speeds to avoid power backflow when traveling at high speeds in the power-split mode, thereby improving system efficiency and reducing fuel consumption. Therefore, this multi-mode hybrid transmission drive system has the advantage of avoiding power backflow problems. Furthermore, the system can adjust the drive system mode according to the actual driving conditions of the vehicle to ensure that the vehicle is in the optimal energy supply mode. Furthermore, the vehicle's multi-mode hybrid transmission system can also recover energy, thereby improving the system's energy utilization rate. Therefore, the vehicle's multi-mode hybrid transmission system also has the advantages of high efficiency and high energy utilization rate.

[0025] Other features and corresponding beneficial effects of the present invention will be described in the latter part of the specification, and it should be understood that at least some of the beneficial effects will become obvious from the description in the specification. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a multi-mode hybrid transmission drive system for automobiles provided in Embodiment 1 of the present invention;

[0027] Figure 2This is a schematic diagram of a single-mode hybrid transmission drive system for a car provided in Embodiment 2 of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10: Engine;

[0030] 20: First motor;

[0031] 30: Second motor;

[0032] 40: First planetary gear set; 410: First ring gear; 420: First planet carrier; 430: First sun gear;

[0033] 50: Second planetary gear set; 510: Second ring gear; 520: Second planet carrier; 530: Second sun gear;

[0034] 60: Brake;

[0035] 70: Clutch;

[0036] 80: One-way clutch;

[0037] 90: Battery;

[0038] 100: First drive shaft;

[0039] 200: Second drive shaft;

[0040] 300: Third drive shaft;

[0041] 400: Fourth drive shaft;

[0042] 500: Output gear;

[0043] 600: First intermediate gear;

[0044] 700: Second intermediate gear;

[0045] 800: Differential. Detailed Implementation

[0046] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a deep understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the invention, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0047] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0048] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in during use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0049] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0050] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0051] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0052] Example 1

[0053] This embodiment provides a multi-mode hybrid transmission drive system for automobiles, such as... Figure 1As shown, it includes a power supply device, a power transmission device, and a power control device. The power supply device includes an engine 10, a first electric motor 20, and a second electric motor 30. The power transmission device includes a first planetary gear set 40 and a second planetary gear set 50. The power control device includes a brake 60 and a clutch 70.

[0054] The first planetary gear set 40 includes a first ring gear 410, a first sun gear 430, and a first planetary assembly disposed between the first ring gear 410 and the first sun gear 430. The second planetary gear set 50 includes a second ring gear 510, a second sun gear 530, and a second planetary assembly disposed between the second ring gear 510 and the second sun gear 530. In the first planetary gear set 40, the first ring gear 410 is connected to the output end of the engine 10 via a first drive shaft 100, the planet carrier of the first planetary assembly is connected to the system output shaft via a second drive shaft 200, and the first sun gear 430 is connected to the first motor 20 via a third drive shaft 300. In the second planetary gear set 50, the second sun gear 530 is connected to the output end of the engine 10 via the first drive shaft 100, and the planet carrier of the second planetary assembly is connected to the system output shaft via the second drive shaft 200. The second motor 30 is connected to the output shaft via a fourth drive shaft 400. Furthermore, the clutch 70 is disposed on the second drive shaft 200 for selectively connecting or disconnecting the power transmission between the system output shaft and the planet carrier of the first planetary assembly, and the planet carrier of the second planetary assembly. The brake 60 is disposed on the second ring gear 510 for selectively braking the second ring gear 510.

[0055] Specifically, the clutch 70 selectively connects or disconnects the power transmission between the system output shaft and the planet carriers of the first planetary assembly and the second planetary assembly. When the clutch 70 is engaged, the power of the planet carriers of the first and / or second planetary assemblies can be transmitted to the system output shaft via the second drive shaft 200, and ultimately to the vehicle wheels. When the clutch 70 is disengaged, the power of the planet carriers of the first and / or second planetary assemblies cannot be transmitted to the second drive shaft 200.

[0056] More specifically, the brake 60 selectively brakes the second ring gear 510 so that when the brake 60 is in the braking state, it can prevent the second ring gear 510 from rotating, allowing the second planetary gear set 50 to transmit energy. When the brake 60 is not in the braking state, the second planetary gear set 50 is in a free state. In this state, if power is transmitted to the planet carrier of the second planetary assembly through the second sun gear 530, causing the planet carrier of the second planetary assembly to rotate, the second ring gear 510 will also rotate, thus preventing the second planetary gear set 50 from transmitting power.

[0057] More specifically, the power transmitted by the engine 10 is transmitted via the first drive shaft 100 to the first ring gear 410, then via the first ring gear 410 to the planet carrier of the first planetary assembly, and finally via the second drive shaft 200 to the system output shaft. Additionally, the power transmitted by the engine 10, after reaching the planet carrier of the first planetary assembly, can also be transmitted to the first sun gear 430, and then via the third drive shaft 300 to the first motor 20 for generating electricity.

[0058] More specifically, the power transmitted by the first motor 20 is transmitted to the first sun gear 430 via the third drive shaft 300, then to the planet carrier of the first planetary assembly via the first sun gear 430, and finally to the system output shaft via the second drive shaft 200. Additionally, the power transmitted from the first motor 20 to the first sun gear 430 via the third drive shaft 300 can also be transmitted to the first ring gear 410. The rotation of the first ring gear 410 drives the second sun gear 530 to rotate, thereby transmitting power to the planet carrier of the second planetary assembly, and finally to the system output shaft via the second drive shaft 200.

[0059] More specifically, the power transmitted by the second motor 30 is transmitted to the system output shaft via the fourth drive shaft 400.

[0060] More specifically, the planet carrier of the first planetary assembly and the second drive shaft 200, the second drive shaft 200 and the system output shaft; the first sun gear 430 and the third drive shaft 300, the third drive shaft 300 and the first motor 20; the second sun gear 530 and the first drive shaft 100, the first drive shaft 100 and the output end of the engine 10; the planet carrier of the second planetary assembly and the second drive shaft 200, the second drive shaft 200 and the system output shaft; the second motor 30 and the fourth drive shaft 400, the fourth drive shaft 400 and the output shaft can be connected by snap-fit, riveting, or other methods. The specific connections can be determined according to actual design and usage requirements; this embodiment does not impose specific limitations on this.

[0061] More specifically, the output end of the engine 10 is connected to the first drive shaft 100 via a torsional damper. The first gear ring 410 and the first drive shaft 100 can be connected via a spline or as a single unit, depending on the actual design and usage requirements. This embodiment does not impose any specific limitations on this. Furthermore, the rotation of the output end of the engine 10 drives the first drive shaft 100 to rotate, which in turn drives the first gear ring 410 to rotate.

[0062] More specifically, the clutch 70 and the second drive shaft 200, and the brake 60 and the second gear ring 510, can be connected by snap-fit, sleeve, or other means. The specific connection can be determined according to actual design and usage requirements; this embodiment does not impose any specific limitations on this.

[0063] More specifically, the first planetary assembly and the second planetary assembly each include a planet carrier and at least three planetary gears, and the number of planetary gears can be set to three, four, etc. Preferably, in order to ensure balanced force and smooth transmission, the number of planetary gears in this embodiment is set to three.

[0064] It should be noted that engine 10 can provide power to the vehicle's multi-mode hybrid transmission drive system, while the first motor 20 and the second motor 30 can respectively provide power to the system or recover energy. The power transmission device is used for power transmission, and the power control device is used to control the direction of power flow. In this vehicle's multi-mode hybrid transmission drive system, six driving modes can be achieved by controlling the engagement and disengagement of brake 60 and clutch 70: power split mode, conventional mode, parallel mode, single-motor pure electric mode, dual-motor pure electric mode, and energy recovery mode. By switching between modes, the power split mode is used when the vehicle is traveling at low speeds to better adjust the engine 10's operating point; the parallel mode is used when the vehicle is traveling at high speeds to avoid power backflow when traveling at high speeds in power split mode, thereby improving system efficiency and reducing fuel consumption. Therefore, this vehicle's multi-mode hybrid transmission drive system has the advantage of avoiding power backflow problems. Furthermore, the system can adjust the drive system mode according to the vehicle's actual driving conditions to ensure the vehicle is in the optimal energy supply mode. Furthermore, the vehicle's multi-mode hybrid transmission system can also recover energy, thereby improving the system's energy utilization rate. Therefore, the vehicle's multi-mode hybrid transmission system also has the advantages of high efficiency and high energy utilization rate.

[0065] According to another specific embodiment of the present invention, such as Figure 1 As shown, an embodiment of the present invention discloses a multi-mode hybrid transmission drive system for automobiles, which further includes a one-way clutch 80, and the one-way clutch 80 is disposed at the output end of the engine 10.

[0066] Specifically, the one-way clutch 80 can be connected to the output end of the engine 10 by means of socketing, snap-fitting, etc. The specific connection can be set according to actual design and usage requirements. This embodiment does not make specific limitations on this.

[0067] It should be noted that the one-way clutch 80 can restrict the free rotation of the engine 10 to avoid affecting the power input in the system when the engine 10 rotates freely, thereby further improving the efficiency and energy utilization of the vehicle's multi-mode hybrid transmission drive system.

[0068] According to another specific embodiment of the present invention, such as Figure 1 As shown, an embodiment of the present invention discloses a multi-mode hybrid transmission drive system for automobiles, which further includes a battery 90, and the battery 90 is electrically connected to a first motor 20 and a second motor 30 respectively.

[0069] Specifically, the energy transmitted by the engine 10 through the first sun gear 430 can be used to generate electricity through the first motor 20 and stored in the battery 90.

[0070] More specifically, the battery 90 can be a rechargeable battery such as a nickel-metal hydride battery 90 or a lithium battery 90. The specific type can be set according to actual design and usage requirements. This embodiment does not make any specific limitations on this.

[0071] It should be noted that the battery 90 can supply power to the first motor 20 and the second motor 30 respectively, so that when the first motor 20 and / or the second motor 30 need to supply power, it can drive the first motor 20 and / or the second motor 30 to supply power to the multi-mode hybrid transmission drive system of the vehicle. The battery 90 can also recover excess energy in the multi-mode hybrid transmission drive system through the first motor 20 and / or the second motor 30, thereby improving the energy utilization rate of the multi-mode hybrid transmission drive system of the vehicle and improving the fuel saving capability of the vehicle.

[0072] According to another specific embodiment of the present invention, such as Figure 1 As shown, an embodiment of the present invention discloses a multi-mode hybrid transmission drive system for automobiles. The power transmission device further includes an intermediate transmission device disposed between the system output shaft and the differential 800 of the automobile. The intermediate transmission device includes an intermediate shaft and an intermediate gear disposed on the intermediate shaft. One side of the intermediate gear meshes with the output gear 500 of the system output shaft, and the other side meshes with the differential drive gear of the differential 800.

[0073] It should be noted that the system output shaft transmits energy between the intermediate transmission device and the differential 800, thereby transferring the energy delivered by the multi-mode hybrid transmission drive system of the vehicle to the vehicle wheels via the differential 800, or transferring excess energy from the vehicle wheels back to the multi-mode hybrid transmission drive system via the differential 800 and storing it in the battery 90, thereby improving the energy utilization rate of the multi-mode hybrid transmission drive system of the vehicle and improving the vehicle's fuel efficiency.

[0074] According to another specific embodiment of the present invention, such as Figure 1 As shown, an embodiment of the present invention discloses a multi-mode hybrid transmission drive system for automobiles. The intermediate gear includes a first intermediate gear 600 disposed on one side of the intermediate shaft and a second intermediate gear 700 disposed on the other side of the intermediate shaft. The first intermediate gear 600 meshes with the output gear 500 of the system output shaft, the second intermediate gear 700 meshes with the differential drive gear, and the two sides of the output end of the differential 800 are respectively connected to the wheels on both sides of the automobile via two half-shafts.

[0075] Specifically, the output gear 500 of the system output shaft can be configured as either internal or external gears, and the first intermediate gear 600 is adapted accordingly. The differential drive gear of the differential 800 can also be configured as either internal or external gears, and the second intermediate gear 700 is adapted accordingly. These specific configurations can be determined based on actual design and usage requirements; this embodiment does not impose any specific limitations on them.

[0076] According to another specific embodiment of the present invention, such as Figure 1 As shown, an embodiment of the present invention discloses a multi-mode hybrid transmission drive system for automobiles. A first planetary assembly includes a first planet carrier 420 and at least three first planetary gears. The at least three first planetary gears are evenly and spaced apart on the first planet carrier 420 and fixedly connected to it. Each first planetary gear meshes with a first ring gear 410 and a first sun gear 430, respectively. A second planetary assembly includes a second planet carrier 520 and at least three second planetary gears. The at least three second planetary gears are evenly and spaced apart on the second planet carrier 520 and fixedly connected to it. Each second planetary gear meshes with a second ring gear 510 and a second sun gear 530, respectively.

[0077] Specifically, the number of first planetary gears in the first planetary assembly can be set to three, four, etc. The number of second planetary gears in the second planetary assembly can be set to three, four, etc. Preferably, to ensure balanced force and smooth transmission, the number of first planetary gears and second planetary gears in this embodiment are each set to three.

[0078] More specifically, the first planetary carrier 420 and the first planetary gear, and the second planetary carrier 520 and the second planetary gear can be connected by screws, rivets, or other means. The specific connection can be set according to actual design and usage requirements, and this embodiment does not impose any specific limitations on this.

[0079] It should be noted that the first sun gear 430 can transmit energy to the first planet carrier 420 through the first planet gear, and the second sun gear 530 or the second ring gear 510 can transmit energy to the second planet carrier 520 through the second planet gear. Furthermore, the first planet carrier 420 and the second planet carrier 520 rotate synchronously, so that the energy output by the first planet carrier 420 and / or the second planet carrier 520 is transmitted to the system output shaft through the second drive shaft 200.

[0080] According to another specific embodiment of the present invention, such as Figure 1 As shown, an embodiment of the present invention discloses a multi-mode hybrid transmission drive system for automobiles, wherein a first planetary assembly and a second planetary assembly are arranged side by side in the automobile's transmission.

[0081] It should be noted that this configuration saves space within the gearbox occupied by the first and second planetary gear units, thereby reducing the space required for the multi-mode hybrid transmission drive system. Furthermore, this configuration facilitates energy transfer between the first and second planetary gear units.

[0082] According to another specific embodiment of the present invention, such as Figure 1 As shown, an embodiment of the present invention discloses a multi-mode hybrid transmission drive system for automobiles. In the automobile's transmission, the output gear 500 of the second motor 30 is located on the opposite side of the first planetary assembly and the second planetary assembly relative to the system output shaft.

[0083] It should be noted that this configuration allows the multi-mode hybrid transmission drive system to be more compact, thereby further reducing the space occupied by the multi-mode hybrid transmission drive system in the vehicle.

[0084] The multi-mode hybrid transmission drive system of this vehicle can achieve six driving modes—power split mode, conventional mode, parallel mode, single-motor pure electric mode, dual-motor pure electric mode, and energy recovery mode—by controlling the closing and opening of the brake 60 and the engagement and disengagement of the clutch 70. Table 1 below shows the driving modes of the multi-mode hybrid transmission drive system of this vehicle.

[0085] Table 1

[0086]

[0087] Power split mode: Engine 10 operates, one-way clutch 80 is in a free-rotating state, brake 60 is in a non-braking state, clutch 70 is in a engaged state, first motor 20 is in a generating state, and second motor 30 is in a driving state. The power generated by engine 10 is transmitted to first drive shaft 100, and then to first ring gear 410. The rotation of first ring gear 410 drives first planetary carrier 420 to rotate, and then to system output shaft via second drive shaft 200 and clutch 70. From system output shaft, it is transmitted to vehicle differential 800 via intermediate transmission device, and finally to vehicle wheels. Simultaneously, the power transmitted from engine 10 to first ring gear 410 can also be transmitted to first sun gear 430, and then to first motor 20 via third drive shaft 300, where this kinetic energy is converted into electrical energy and stored in battery 90. In addition, the battery 90 is electrically connected to the second motor 30 to supply power to the second motor 30, so that the second motor 30 drives the fourth drive shaft 400 to rotate and transmits the power to the system output shaft. Then, the power is transmitted from the system output shaft to the differential 800 of the car through the intermediate transmission device, and finally to the car wheels.

[0088] Traditional mode: Engine 10 is operating, one-way clutch 80 is in a free-rotating state, brake 60 is in a braking state, clutch 70 is in a engaged state, and both first motor 20 and second motor 30 are not operating. The power generated by engine 10 is transmitted to first drive shaft 100, and then to first gear ring 410. The rotation of first gear ring 410 drives first planetary carrier 420 to rotate, and then to system output shaft via second drive shaft 200 and clutch 70. From system output shaft, the power is transmitted to vehicle differential 800 via intermediate transmission device, and finally to vehicle wheels. Meanwhile, since the brake 60 is in a braking state, that is, the second ring gear 510 is in a locked state, the power transmitted to the second sun gear 530 through the first drive shaft 100 can also be transmitted to the second planetary carrier 520, and simultaneously transmitted to the system output shaft through the second drive shaft 200 and the clutch 70. Then, the power is transmitted from the system output shaft to the differential 800 of the car through the intermediate transmission device, and finally to the car wheels.

[0089] Parallel mode: Engine 10 is operating, one-way clutch 80 is in a free-rotating state, brake 60 is in a braking state, clutch 70 is in a engaged state, and both the first motor 20 and the second motor 30 are operating. The power generated by engine 10 is transmitted through one-way clutch 80 to the first drive shaft 100, and then through the first drive shaft 100 to the first gear ring 410. The rotation of the first gear ring 410 drives the first planetary carrier 420 to rotate, and then through the second drive shaft 200 and clutch 70 to the system output shaft. From the system output shaft, the power is transmitted through the intermediate transmission device to the vehicle's differential 800, and finally to the vehicle wheels. Meanwhile, since the brake 60 is in a braking state, that is, the second ring gear 510 is in a locked state, the power transmitted to the second sun gear 530 through the first drive shaft 100 can also be transmitted to the second planetary carrier 520, and simultaneously transmitted to the system output shaft through the second drive shaft 200 and the clutch 70. Then, the power is transmitted from the system output shaft to the differential 800 of the car through the intermediate transmission device, and finally to the car wheels.

[0090] The power transmitted from engine 10 to the first ring gear 410 can also be transmitted to the first sun gear 430, and then through the third drive shaft 300 to the first motor 20. The first motor 20 is electrically connected to the battery 90 and converts this kinetic energy into electrical energy, which is stored in the battery 90. Furthermore, when the system output shaft requires more power, the battery 90 can also supply power to the first motor 20, causing the first motor 20 to rotate. This power is then transmitted through the third drive shaft 300 to the first sun gear 430. The rotation of the first sun gear 430 drives the first planetary carrier 420 to rotate, and then through the second drive shaft 200 and the clutch 70 to the system output shaft. From there, the power is transmitted through the system output shaft to the vehicle's differential 800 via an intermediate transmission device, and finally to the vehicle's wheels.

[0091] Battery 90 is electrically connected to the second motor 30 to supply power to the second motor 30, causing the second motor 30 to drive the fourth drive shaft 400 to rotate and transmit power to the system output shaft. From the system output shaft, the power is transmitted to the vehicle's differential 800 via an intermediate transmission device, and finally to the vehicle's wheels. Additionally, excess energy at the system output shaft can be converted into electrical energy by the second motor 30 and stored in the battery 90.

[0092] Single-motor pure electric mode: Engine 10 is not working, one-way clutch 80 is in a free-rotating state, brake 60 is in a non-braking state, clutch 70 is in a disengaged state, first motor 20 is not working, and second motor 30 is in a driving state. Battery 90 supplies power to second motor 30, causing second motor 30 to drive fourth drive shaft 400 to rotate and transmit power to system output shaft. Then, from system output shaft, power is transmitted through intermediate transmission device to vehicle differential 800, and finally to vehicle wheels.

[0093] Dual-motor pure electric mode: Engine 10 is not working, one-way clutch 80 is locked, brake 60 is not braking, clutch 70 is engaged, first motor 20 is in drive mode, and second motor 30 is in drive mode. Battery 90 supplies power to first motor 20, causing it to rotate. The power is transmitted through third drive shaft 300 to first sun gear 430. The rotation of first sun gear 430 drives first planetary carrier 420 to rotate, and the power is transmitted through second drive shaft 200 and clutch 70 to system output shaft. Then, the power is transmitted from system output shaft to vehicle differential 800 via intermediate transmission device, and finally to vehicle wheels.

[0094] It should be noted that since the brake 60 is in a non-braking state, meaning the second ring gear 510 is not locked and is in a free state, the power transmitted from the first sun gear 430 to the first ring gear 410, which in turn drives the second sun gear 530 to rotate, will not be transmitted through the second planetary carrier 520. Furthermore, since the one-way clutch 80 is in a disengaged state, the power transmitted from the first sun gear 430 to the first ring gear 410 will not be transmitted to the engine 10, thus preventing the engine 10 from rotating freely.

[0095] Battery 90 is electrically connected to the second motor 30 to supply power to the second motor 30, so that the second motor 30 drives the fourth drive shaft 400 to rotate and transmits power to the system output shaft. Then, the power is transmitted from the system output shaft to the differential 800 of the car through the intermediate transmission device, and finally to the car wheels.

[0096] Energy recovery mode: Engine 10 is not working, one-way clutch 80 is in a free-rotating state, brake 60 is in a non-braking state, clutch 70 is in a disengaged state, first motor 20 is not working, and second motor 30 is in a generating state. Excess energy at the vehicle wheels is transferred sequentially through differential 800 and intermediate transmission to the system output shaft, and then the second motor 30 converts this kinetic energy into electrical energy stored in battery 90.

[0097] Example 2

[0098] This embodiment provides a single-mode hybrid transmission drive system for automobiles, such as... Figure 2 As shown, the difference between this embodiment and Embodiment 1 is that the single-mode hybrid transmission drive system of the vehicle in this embodiment does not include the brake 60 and the clutch 70. In this embodiment, the engine 10 is working, the one-way clutch 80 is in a free-rotating state, the first motor 20 is in a power generation state, and the second motor 30 is in a driving state. The power generated by the engine 10 is transmitted to the first drive shaft 100, and then to the first ring gear 410. The rotation of the first ring gear 410 drives the first planetary carrier 420 to rotate, and then transmits the power through the second drive shaft 200 to the system output shaft. From the system output shaft, the power is transmitted to the vehicle's differential 800 through an intermediate transmission device, and finally to the vehicle's wheels. At the same time, the power transmitted from the engine 10 to the first ring gear 410 can also be transmitted to the first sun gear 430, and then to the first motor 20 through the third drive shaft 300, where this kinetic energy is converted into electrical energy and stored in the battery 90. In addition, the battery 90 is electrically connected to the second motor 30 to supply power to the second motor 30, so that the second motor 30 drives the fourth drive shaft 400 to rotate and transmits the power to the system output shaft. Then, the power is transmitted from the system output shaft to the differential 800 of the car through the intermediate transmission device, and finally to the car wheels.

[0099] It should be noted that since the second ring gear 510 is in an unlocked, free state, the power transmitted to the second sun gear 530 via the first drive shaft 100 will not be transmitted out through the second planetary carrier 520. This vehicle's single-mode hybrid transmission drive system can recover excess energy within the system, thereby improving the system's energy utilization rate, thus offering advantages of high efficiency and high energy utilization.

[0100] Example 3

[0101] This embodiment provides a vehicle, including the multi-mode hybrid transmission drive system of the vehicle in Embodiment 1 or the single-mode hybrid transmission drive system of the vehicle in Embodiment 2.

[0102] Specifically, multi-mode hybrid transmission drive systems or single-mode hybrid transmission drive systems can be applied to HEV (hybrid electric vehicle) and PHEV (plug-in hybrid electric vehicle) models. The specific configuration can be determined based on actual design and usage requirements; this embodiment does not impose any specific limitations.

[0103] It should be noted that the multi-mode hybrid transmission drive system of this vehicle employs a power-split mode when the vehicle is traveling at low speeds to better adjust the operating point of the engine 10; when the vehicle is traveling at high speeds, it employs a parallel mode to avoid power backflow that occurs when the vehicle is traveling at high speeds in power-split mode, thereby improving system efficiency and reducing fuel consumption. Furthermore, by switching the drive modes of the multi-mode hybrid transmission drive system, the vehicle can maintain its optimal energy supply mode under different driving conditions. The multi-mode hybrid transmission drive system can also perform energy recovery, thereby improving the vehicle's energy utilization rate. Therefore, this vehicle has the advantages of avoiding power backflow problems and achieving high energy utilization efficiency.

[0104] While the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the invention to these descriptions. Various changes in form and detail can be made by those skilled in the art, including several simple deductions or substitutions, without departing from the spirit and scope of the invention.

Claims

1. A multi-mode hybrid transmission drive system for automobiles, characterized in that, It includes a power supply device, a power transmission device, and a power control device; among which The power supply device includes an engine, a first motor, and a second motor; the power transmission device includes a first planetary gear set and a second planetary gear set; the power control device includes a brake and a clutch. in The first planetary gear set includes a first ring gear, a first sun gear, and a first planetary assembly disposed between the first ring gear and the first sun gear; the second planetary gear set includes a second ring gear, a second sun gear, and a second planetary assembly disposed between the second ring gear and the second sun gear; the first planetary assembly includes a first planet carrier, and the second planetary assembly includes a second planet carrier; and In the first planetary gear set, the first ring gear is connected to the output end of the engine via a first drive shaft, the first planet carrier of the first planetary assembly is connected to the system output shaft via a second drive shaft, and the first sun gear is connected to the first motor via a third drive shaft. In the second planetary gear set, the second sun gear is connected to the output end of the engine via the first drive shaft, and the second planet carrier of the second planetary assembly is connected to the system output shaft via the second drive shaft; The second motor is connected to the output shaft via a fourth drive shaft; and The clutch is mounted on the second drive shaft and is used to selectively connect or disconnect the power transmission between the system output shaft and the first planetary carrier of the first planetary assembly and the second planetary carrier of the second planetary assembly. The brake is disposed on the second gear ring and is used to selectively brake the second gear ring; When the clutch is engaged, the brake is engaged, and both the first motor and the second motor are operating, the power generated by the engine is transmitted to the first drive shaft, and then to the first ring gear. The first ring gear rotates, causing the first planetary carrier to rotate, and the power is transmitted to the system output shaft via the second drive shaft and the clutch. When the second ring gear is locked, the power transmitted to the second sun gear via the first drive shaft is transmitted to the second planetary carrier, and then to the system output shaft via the second drive shaft and the clutch.

2. The multi-mode hybrid transmission drive system for automobiles as described in claim 1, characterized in that, It also includes a one-way clutch, which is located at the output end of the engine.

3. The multi-mode hybrid transmission drive system as described in claim 2, characterized in that, It also includes a battery, which is electrically connected to the first motor and the second motor respectively.

4. The multi-mode hybrid transmission drive system for automobiles as described in claim 3, characterized in that, The power transmission device further includes an intermediate transmission device disposed between the system output shaft and the vehicle differential; wherein The intermediate transmission device includes an intermediate shaft and an intermediate gear disposed on the intermediate shaft. One side of the intermediate gear meshes with the output gear of the system output shaft, and the other side meshes with the differential drive gear of the differential.

5. The multi-mode hybrid transmission drive system for automobiles as described in claim 4, characterized in that, The intermediate gear includes a first intermediate gear disposed on one side of the intermediate shaft and a second intermediate gear disposed on the other side of the intermediate shaft; and The first intermediate gear meshes with the output gear of the system output shaft, the second intermediate gear meshes with the differential drive gear, and the two sides of the differential output end are respectively connected to the wheels on both sides of the vehicle through two half shafts.

6. The multi-mode hybrid transmission drive system for automobiles as described in claim 5, characterized in that, The first planetary assembly further includes at least three first planetary gears, which are evenly and spaced apart on the first planetary carrier and fixedly connected to the first planetary carrier. Each first planetary gear meshes with the first gear ring and the first sun gear, respectively. The second planetary assembly further includes at least three second planetary gears, which are evenly and spaced apart on the second planetary carrier and fixedly connected to the second planetary carrier. Each second planetary gear meshes with the second ring gear and the second sun gear, respectively.

7. The multi-mode hybrid transmission drive system for automobiles as described in claim 6, characterized in that, The first planetary assembly and the second planetary assembly are arranged side by side within the vehicle's transmission.

8. The multi-mode hybrid transmission drive system for automobiles as described in claim 7, characterized in that, Within the vehicle's transmission, the output gear of the second motor relative to the system's output shaft is located on opposite sides of the first planetary assembly and the second planetary assembly.

9. A car, characterized in that, Including the multi-mode hybrid transmission drive system for automobiles as described in any one of claims 1-8.

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