CN203267762U - single-planet row automotive hybrid power assembly - Google Patents

Abstract

The utility model discloses a single-planet row automotive hybrid power assembly. The single-planet row automotive hybrid power assembly comprises an engine, a power coupling device, a first motor, a second motor, a drive axle, a motor controller, a power assembly controller and a power battery. A first motor output shaft and a second motor output shaft are arranged in the power coupling device. The first motor and the second motor are connected to the first motor output shaft and the second motor output shaft respectively through a first motor coupling and a second motor coupling. Power is transmitted through a gear pair or a chain wheel-chain transmission mechanism between a power output shaft and the drive axle so that the power can be transmitted to the drive axle by the power output shaft in a radial output mode. According to the single-planet row automotive hybrid power assembly, a single-planet row structure is adopted for achieving the function of a series-parallel power assembly system with double planet rows; the hybrid power assembly is easy to design and machine and beneficial to manufacturing cost reduction, lowers the failure rate of the planet row, solves the problems of oil leakage, sealing and the like of a gear case, can realize five operating modes including hybrid power, pure electromotion, braking feedback, on-spot electricity generation and power grid charging, and realizes energy conservation and emission reduction of a vehicle.

Description

A hybrid powertrain for a single planetary train

technical field

The utility model relates to a hybrid power assembly for a vehicle, in particular to a hybrid power assembly for a single planetary row vehicle used for a hybrid hybrid power.

Background technique

Hybrid electric vehicles have become the development direction of clean and efficient vehicles, one of the best ways to solve environmental protection and energy-saving problems, and an inevitable choice for the sustainable development of my country's automobile industry. Hybrid vehicles using traditional internal combustion engines and battery-motors as power systems have become a hot research topic in automotive power system technology due to their advantages of low energy consumption and low emissions. Hybrid electric vehicles use two kinds of power sources as power devices, and its various components, layout methods and control strategies are different, thus forming a variety of structural types. There are also many ways to classify hybrid vehicles. According to the number of power sources and the power transmission mode, it can be divided into series type, parallel type and hybrid type. Among them, the series type and parallel type have low energy saving rate due to their own structural limitations, or the application occasions are greatly restricted, and the market share has been declining year by year. The hybrid type is currently the mainstream of research and market. There are different types of existing series-connected hybrid powertrains, and the most typical one is a split system based on a two-degree-of-freedom planetary split-merge mechanism, as shown in Figure 1, Toyota's THS hybrid powertrain system. There are also some hybrid types based on the planetary row type, in order to reduce the volume and weight of the electric motor, a double planetary row structure is adopted. However, the design and manufacture of the planetary row, especially the rear planetary row needs to work under high-speed and high-torque conditions, which puts forward high requirements for its design and manufacture, which is the main reason for the high manufacturing cost and high failure rate of this type of structure. In addition, on some power plants used in rear-wheel-drive models, the double planetary row structure needs to be made into a hollow-shaft motor so that the power output shaft can pass through, resulting in a complex structure of the motor shaft. The sealing problem is also difficult to solve.

Utility model content

In view of the above problems, the utility model provides a hybrid powertrain for a single planetary row vehicle, which is a hybrid powertrain system based on a single planetary row structure to realize the function of a double planetary row, which is suitable for light, medium and heavy duty vehicles. Hybrid vehicles use requirements, easy to design and process, which is beneficial to reduce manufacturing costs, reduce planetary failure rate, and solve problems such as oil leakage and sealing of gearboxes

In order to solve the above-mentioned technical problems, the technical scheme realized by the hybrid power assembly for single planetary train of the present invention is: the power assembly includes an engine, a power coupling device, a first motor, a second motor, a drive axle, and a motor controller , a powertrain controller and a power battery, the power coupling device includes a clutch, a brake, an engine output shaft and a power output shaft, a planetary row is arranged between the engine output shaft and the power output shaft, and the planetary row It is composed of a sun gear, a ring gear, a planetary carrier and a planetary gear. One end of the engine output shaft is connected to the clutch, and the other end of the engine output shaft is connected to the planetary carrier. The clutch is used to control the power of the engine. output and interruption; the brake is set on the engine output shaft for braking the engine output shaft and the planet carrier; the power coupling device is provided with a first motor output shaft and a second motor output shaft The first motor is coupled to the output shaft of the first motor through a first motor coupling, the output shaft of the first motor is provided with a driving gear of the first motor, and the output shaft of the power is provided with the The first motor driven gear meshed with the driving gear of the first motor; the second motor is connected to the second motor output shaft through the second motor coupling, and the second motor output shaft is provided with a second motor drive gear, the central shaft of the sun gear is a hollow shaft, the central shaft is sleeved on the output shaft of the engine, and the second motor driven gear meshed with the driving gear of the second motor is arranged on the central shaft; One end of the power output shaft is supported on the housing of the power coupling device through a bearing, and the other end of the power output shaft is connected with the ring gear; a gear pair is arranged between the power output shaft and the drive axle Or a sprocket chain transmission mechanism, so that the power output shaft transmits power to the drive axle in a radial output mode; the engine, the power battery, the controller of the power coupling device and the motor control The controllers are all connected with the powertrain controller; the first motor, the second motor and the power battery are all connected with the motor controller; the power coupling device is used to realize engine power, first Coupling of motor power and second motor power.

In the present utility model, the first motor and the second motor are motor/generators.

Compared with the prior art, the beneficial effects of the utility model are:

The utility model uses a single planetary row structure to realize the function of a dual planetary row hybrid power assembly system, can adapt to the use requirements of light, medium and heavy hybrid vehicles, is easy to design and process, and is beneficial to reduce manufacturing costs and reduce planetary row failures It is easy to arrange and reduce costs; and it can realize five working modes of hybrid power, brake feedback, pure electric, in-situ power generation and grid charging, which is conducive to energy saving and emission reduction.

Description of drawings

Fig. 1 is a schematic diagram of a hybrid power assembly for a single planetary row car of the present invention;

Fig. 2 is a schematic structural diagram of the power coupling device shown in Fig. 1 .

In the picture:

1-engine, 2-power coupling device, 3-first motor, 4-second motor, 5-drive axle, 6-motor controller, 7-power battery, 8-powertrain controller, 9-clutch, 10-engine output shaft, 11-second motor driving gear, 12-sun gear, 13-ring gear, 14-power output shaft, 15-second motor input shaft, 16-second motor coupling, 17-the first One motor driven gear, 19-first motor driving gear, 20-first motor coupling, 21-first motor input shaft, 22-planet carrier, 23-planetary gear, 24-central shaft, 25-second Motor driven gear, 26-brake.

Detailed ways

The utility model will be further described in detail below in conjunction with specific embodiments.

As shown in Figure 1, the utility model is a hybrid power assembly for a single planetary train, including an engine 1, a power coupling device 2, a first motor 3, a second motor 4, a drive axle 5, a motor controller 6, a power The assembly controller 8 and the power battery 7, the engine 1, the power battery 7, the controller of the power coupling device 2 and the motor controller 6 are all connected with the power assembly controller 8; The first motor 3, the second motor 4 and the power battery 7 are all connected to the motor controller 6; the power coupling device 2 is used to realize engine power, first motor power and second motor power coupling.

As shown in Figure 2, the power coupling device 2 includes a clutch 9, a brake 26, an engine output shaft 10 and a power output shaft 14, and a planetary row is arranged between the engine output shaft 10 and the power output shaft 14, so The planetary row is composed of a sun gear 12, a ring gear 13, a planetary carrier 22 and a planetary gear 23. One end of the engine output shaft 10 is connected to the clutch 9, and the other end of the engine output shaft 10 is connected to the planetary carrier 22. The clutch 9 is used to control the output and interruption of engine power; the brake 26 is arranged on the engine output shaft 10 for braking the engine output shaft 10 and the planet carrier 22 .

Both the first motor 3 and the second motor 4 are arranged outside the casing of the power coupling device 2, and the motor controller 6 controls the operation of the first motor 3 and the second motor 4, so The first motor 3 and the second motor 4 are motor/generators, that is, under the control of the motor controller 6, the first motor 3 and the second motor 4 can be used as motors or as Generator; the first motor 3 and the engine 1 can be arranged on the same side or on the opposite side of the power coupling device 2, and the first motor 3 and the second motor 4 are arranged on the power coupling device 2 Same side or different side.

The first motor output shaft 21 and the second motor output shaft 15 are provided in the power coupling device; the first motor 3 is coupled to the first motor output shaft 21 through the first motor coupling 20, the The first motor output shaft 21 is provided with a first motor driving gear 19, and the power output shaft 14 is provided with a first motor driven gear 17 meshing with the first motor driving gear 19; the second motor 4 Connected to the second motor output shaft 15 through the second motor coupling 16, the second motor output shaft 15 is provided with the second motor driving gear 11, and the central shaft 24 of the sun gear 12 is a hollow shaft, so The central shaft 24 is sleeved on the engine output shaft 10, and the central shaft 24 is provided with a second motor driven gear 25 meshed with the second motor driving gear 11; one end of the power output shaft 14 passes through The bearing is supported on the housing of the power coupling device 2, and the other end of the power output shaft 14 is connected with the ring gear 13; a gear pair or a sprocket is arranged between the power output shaft 14 and the drive axle 5 Chain transmission mechanism, as shown in the double arrow place among Fig. 1, transmits power through gear pair or sprocket chain transmission mechanism between described power output shaft 14 and described driving axle 5, thereby makes described power output shaft 14 will The power is transmitted to the drive axle 5 in a radial output mode.

The utility model realizes the following five working modes under the control of a powertrain controller 8, a motor controller 6 and a controller of a power coupling device for a hybrid powertrain for a vehicle:

When the vehicle is running normally and the power battery 7 is fully charged, the clutch 9 is engaged, the brake 26 is released, and the power of the engine 1 reaches the planet carrier 22 through the clutch 9 and the engine output shaft 10 , wherein part of the power passes through the ring gear 13, and then transmitted to the power output shaft 14 to drive the vehicle radially, and the other part of the power passes through the sun gear 12, the central shaft 24, the second motor driven gear 25, and the second motor drive The gear 11, the second motor output shaft 15, and the second motor coupling 16 drive the second motor 4 to generate electricity, and the electric energy is stored in the power battery 7 for use when the first motor 3 is driven; when the engine 1 When the power cannot meet the needs, the first motor 3 works in a motor mode, and its power passes through the first motor coupling 20, the first motor output shaft 21, the first motor driving gear 19, the first motor driven gear 17, The output of the power output shaft 14 assists in driving the vehicle, so as to realize the hybrid mode of the vehicle.

When the vehicle brakes, the clutch 9 is released, the engine 1 no longer outputs power, and the kinetic energy of the vehicle passes through the wheels, the drive axle 5, the power output shaft 14, the first motor driven gear 17, and the first motor driving gear 19. , the first motor output shaft 21 and the first motor coupling 20 drive the first motor 3 to generate electricity, and the electric energy is stored in the power battery 7, thereby realizing the brake feedback mode of the vehicle.

When the power battery 7 of the vehicle is sufficient and does not need the engine 1 to work, the engine 1 stops, the clutch 9 is disengaged, the brake 26 is released, and the first motor 3 works in a motor mode, and its power passes through the first motor coupling 20, The first motor output shaft 21, the first motor driving gear 19, the first motor driven gear 17, and the power output shaft 14 output and drive the vehicle; when the power provided by the first motor 3 cannot meet the needs of the vehicle, the clutch 9 is separated, and the brake 26 Braking, the planetary carrier 22 can not rotate, and the second motor 4 also works in a motor mode, and its power passes through the second motor coupling 16, the second motor output shaft 15, the second motor driving gear 11, and the second motor driven gear 25. The central shaft 24, the sun gear 12, the planetary gear 23, the ring gear 13, and the power of the final assembly pass through the gear pair or the chain sprocket transmission mechanism between the power output shaft 14 and the drive axle 5 (as shown by the two-way arrow in Figure 1 shown) is output in the form of radial transmission, together with the power coupling from the first motor 3 to drive the vehicle, so as to realize the pure electric mode of the vehicle.

When the power battery 7 of the vehicle is insufficient and the vehicle needs to be parked to generate power, the vehicle brakes, the clutch 9 is engaged, the brake 26 is released, the power of the engine 1 passes through the clutch 9, and the output shaft of the engine 10. The planet carrier 22 is transmitted to the planetary gear 23, and then through the sun gear 12, the central shaft 24, the second motor driven gear 25, the second motor driving gear 11, the The second motor output shaft 15 and the second motor coupling 16 are transmitted to the second motor 4 to drive the second motor 4 to generate electricity, and the electric energy is stored in the power battery 7, thereby realizing the original position of the vehicle. power generation mode.

When the vehicle is stopped at night, the power battery 7 of the vehicle is directly charged by grid electric energy to save fuel consumption of the engine 1 , thereby realizing the grid charging mode of the vehicle.

Although the utility model has been described above in conjunction with the drawings, the utility model is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative, rather than restrictive. Under the enlightenment of the utility model, many deformations can be made without departing from the purpose of the utility model, and these all belong to the protection of the utility model.

Claims (2)

1. A hybrid powertrain for a single-planetary vehicle, including an engine (1), a power coupling device (2), a first motor (3), a second motor (4), a drive axle (5), and a motor controller (6), powertrain controller (8) and power battery (7), characterized in that the power coupling device (2) includes a clutch (9), a brake (26), an engine output shaft (10) and a power The output shaft (14), a planetary row is arranged between the engine output shaft (10) and the power output shaft (14), and the planetary row consists of a sun gear (12), a ring gear (13), a planet carrier ( 22) and planetary gears (23), one end of the engine output shaft (10) is connected to the clutch (9), and the other end of the engine output shaft (10) is connected to the planet carrier (22), so The clutch (9) is used to control the output and interruption of engine power; the brake (26) is set on the engine output shaft (10) for the engine output shaft (10) and the planet carrier (22) braking; The power coupling device is provided with a first motor output shaft (21) and a second motor output shaft (15); the first motor (3) is coupled to the first motor through a first motor coupling (20). On the motor output shaft (21), the first motor output shaft (21) is provided with a first motor driving gear (19), and the power output shaft (14) is provided with the first motor driving gear ( 19) The meshed first motor driven gear (17); the second motor (4) is coupled to the second motor output shaft (15) through the second motor coupling (16), and the second motor outputs The shaft (15) is provided with a second motor drive gear (11), the central shaft (24) of the sun gear (12) is a hollow shaft, and the central shaft (24) is sleeved on the engine output shaft (10) Above, the central shaft (24) is provided with a second motor driven gear (25) meshing with the second motor driving gear (11); one end of the power output shaft 14 is supported on the power coupling device through a bearing On the casing of (2), the other end of the power output shaft (14) is connected to the ring gear (13); a gear is provided between the power output shaft (14) and the drive axle (5) A pair or sprocket chain transmission mechanism, so that the power output shaft (14) transmits power to the drive axle (5) in a radial output mode; The engine (1), the power battery (7), the controller of the power coupling device (2) and the motor controller (6) are all connected to the powertrain controller (8); The first motor (3), the second motor (4) and the power battery (7) are all connected to the motor controller (6); the power coupling device (2) is used to realize engine power, The coupling of the power of the first motor and the power of the second motor. 2. The hybrid powertrain for a single-planetary vehicle according to claim 1, characterized in that, the first motor (3) and the second motor (4) are electric motors/generators.

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