CN115875414A - A multi-gear dual-mode hybrid transmission - Google Patents

Abstract

The invention provides a multi-gear double-mode hybrid transmission which comprises a transmission shell, an input shaft, a generator, a motor, a connecting output shaft, a planetary gear row set, a connecting component set and a torque transmission device, wherein the input shaft, the generator, the motor, the connecting output shaft, the planetary gear row set, the connecting component set and the torque transmission device are arranged in the transmission shell, and the planetary gear row set comprises a first planetary gear row, a second planetary gear row and a third planetary gear row. The torque transmission device can be selectively engaged in a combination of three, and a multi-gear speed ratio is established between the input shaft and the output shaft by connecting the engine, the generator and the motor, wherein the forward gear comprises a pure electric gear, an input shunting gear, a compound shunting gear, a reduction gear, a direct gear and an overdrive gear. The multi-gear dual-mode hybrid transmission provided by the invention adopts a planetary gear train structure for transmission, three planetary gear rows can construct a multi-gear speed ratio, the structure is compact, and the energy loss in the transmission process is less.

Description

A multi-gear dual-mode hybrid transmission

technical field

The invention relates to the technical field of automobile transmission, in particular to a multi-gear dual-mode hybrid transmission.

Background technique

In recent years, due to the scarcity of fossil fuels and stricter carbon emission regulations, the sustainable and healthy development of the global automotive industry is facing great challenges. Power-split hybrid transmission is the core component of power-split hybrid vehicles, which can improve the efficiency and performance of vehicle hybrid systems, and is considered to be one of the effective methods to alleviate energy shortage and reduce pollution.

Dual-mode power-split hybrid transmissions are currently in a vigorous development stage. The current hybrid transmissions have a single structure, few gears and working modes, low fuel efficiency, complex control, and high overall cost, and are often used in high-end models. Therefore, it is necessary to design a new multi-speed dual-mode hybrid transmission.

Contents of the invention

In view of this, the present invention provides a multi-gear dual-mode hybrid transmission, including a transmission housing and an engine and its input shaft installed inside the transmission housing, a generator, an electric motor, a connecting output shaft, planetary gear trains, and coupling members groups and torque transmitting devices,

The input shaft is connected to the engine;

The planetary gear row set includes a first planetary gear row, a second planetary gear row, and a third planetary gear row installed in sequence from front to back, and the torque transmission device includes a first clutch, a second clutch, a first brake, a second clutch, and a second clutch. a brake, the first brake and the second brake are both fixedly connected to the transmission housing;

The first planetary gear row is composed of a first ring gear, a first planetary gear, a first planetary carrier and a first sun gear, the first sun gear and the first planetary gear are externally meshed for transmission, and the first planetary gear Internal meshing transmission with the first ring gear, the first planetary gear is rotatably supported on the first planetary carrier;

The second planetary gear row is composed of a second ring gear, a second planetary gear, a second planetary carrier and a second sun gear, the second sun gear and the second planetary gear are externally meshed for transmission, and the second planetary gear Inner meshing transmission with the second ring gear, the second planetary gear is rotatably supported on the second planetary carrier;

The third planetary gear row is composed of a third ring gear, a third planetary gear, a third planetary carrier and a third sun gear, the third sun gear and the third planetary gear are externally meshed for transmission, and the third planetary gear Inner meshing transmission with the third ring gear, the third planetary gear is rotatably supported on the third planetary carrier;

The set of coupling components includes a first coupling component, a second coupling component, a third coupling component, and a fourth coupling component;

The first coupling member interconnects the first ring gear and the second planet carrier, the second coupling member interconnects the first clutch and the second sun gear, and the third coupling member interconnects the second sun gear and the second sun gear. the three sun gears are interconnected, and the fourth coupling member interconnects the second ring gear and the third planet carrier;

the first brake interconnects the third ring gear with the transmission housing and the second brake interconnects the first sun gear with the transmission housing;

the first clutch interconnects the fourth coupling member with the third planet carrier; the second clutch interconnects the first ring gear with the second planet carrier;

The first clutch, the second clutch, the first brake, and the second brake are selectively engaged to cooperate with different working modes of the engine, generator, and electric motor, so as to establish a multi-speed transmission mode between the input shaft and the output shaft.

Further, it is characterized in that: the working mode of the transmission includes: pure electric mode, hybrid mode and pure fuel mode;

The pure electric mode is:

The electric motor is started, the first brake is engaged, the transmission enters the pure electric working mode, and the output shaft is driven by pure electric power.

The hybrid power mode includes an input split working mode and a compound split working mode;

Among them, the input split working mode is: the engine is started, the generator is started, the electric motor is started, the first brake is engaged, the transmission enters the input split working mode, and the output shaft is driven with mixed power;

Compound split working mode; engine starts, generator starts, electric motor starts, the first clutch is engaged, the transmission enters compound split working mode, and the output shaft is driven by hybrid power;

The pure fuel mode includes a first gear working mode, a second gear working mode and a third gear working mode,

Wherein, the first-gear working mode is: the engine is started, and the first-gear transmission ratio is established between the input shaft and the output shaft by engaging the first clutch and the first brake;

The second gear working mode is: the engine is started, and the second gear transmission ratio is established between the input shaft and the output shaft by engaging the first clutch and the second clutch;

The third-gear working mode is: the engine is started, and the third-gear transmission ratio is established between the input shaft and the output shaft by engaging the second brake and the first clutch.

The beneficial effects brought by the technical scheme provided by the invention are:

1. The multi-gear dual-mode hybrid transmission provided by the present invention can work in the modes of fuel drive, electric drive and hybrid drive respectively, and can effectively reduce fuel consumption, vehicle emissions and pollution during operation.

2. The mechanism part of the multi-gear dual-mode hybrid transmission provided by the present invention adopts planetary gear train transmission, and the three planetary gear rows are compact in structure, and single planetary gear or double planetary gear can be used, and the manufacturing process is mature;

3. The multi-gear dual-mode hybrid transmission provided by the present invention only uses four control elements, which are two clutches and two brakes, and only one control element needs to be replaced in the process of switching to the next gear, so the control more simple.

Description of drawings

Fig. 1 is a schematic structural diagram of a multi-gear dual-mode hybrid transmission of the present invention.

In the figure: 1-input shaft, 2-output shaft, 3-generator, 4-motor, 5-transmission housing, 6-first ring gear, 7-first planetary gear, 8-first planet carrier, 9- The first sun gear, 10-the second ring gear, 11-the second planetary gear, 12-the second planet carrier, 13-the second sun gear, 14-the third ring gear, 15-the third planet carrier, 16-the first Three planetary gears, 17-third sun gear, 18-first coupling member, 19-second coupling member, 20-third coupling member, 21-fourth coupling member, B1-first brake, B2-second brake , C1-first clutch, C2-clutch.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

Please refer to FIG. 1 , the embodiment of the present invention provides a multi-gear dual-mode hybrid transmission, including a transmission housing and an input shaft 1, an output shaft 2, three planetary gear rows, two Brakes, two clutches, and four coupling components, among which, the three planetary gear rows are the first planetary gear row, the second planetary gear row, and the third planetary gear row; the two brakes are the first brake B1 and the second brake B2 ; The four coupling members are the first coupling member 18, the second coupling member 19, the third coupling member 20, and the fourth coupling member 21, and the two clutches are respectively: the first clutch C1 and the second clutch C1.

Both the first brake B1 and the second brake B2 are fixedly connected to the transmission housing 5; the input shaft 1 is connected to the engine;

The three planetary gear rows are located in the transmission housing 5, wherein the first planetary gear row includes the first ring gear 6, the first planetary gear 7, the first planet carrier 8 and the first sun gear 9, the first sun gear 9 The first planetary gear 7 is externally meshed with the first planetary gear 7 , and the first planetary gear 7 is meshed with the inner ring gear 6 for transmission. The first planetary wheel 7 is rotatably supported on the first planetary carrier 8 .

The second planetary gear row includes a second ring gear 10, a second planetary gear 11, a second planetary carrier 12 and a second sun gear 13, the second sun gear 13 and the second planetary gear 11 are externally meshed for transmission, and the The second planetary gear 11 is internally meshed with the second ring gear 10 , and the second planetary gear 11 is rotatably supported on the second planetary carrier 12 .

The third planetary gear row includes a third ring gear 14, a third planetary gear 16, a third planetary carrier 15 and a third sun gear 17, the third sun gear 17 and the third planetary gear 16 are externally meshed for transmission, and the The third planetary gear 16 is internally meshed with the third ring gear 14 , and the third planetary gear 16 is rotatably supported on the third planetary carrier 15 .

The first coupling member 18 interconnects the first ring gear 6 and the second planet carrier 12, the second coupling member 19 interconnects the first clutch C2 and the second sun gear 13, and the third coupling member 20 interconnects the first clutch C2 and the second sun gear 13. The second sun gear and the third sun gear are interconnected, and the fourth coupling member 21 interconnects the second ring gear 10 and the third planet carrier 15;

A first brake B1 interconnects the third ring gear 14 with the transmission housing 5, said second brake B2 interconnects the first sun gear 9 with the transmission housing 5;

The first clutch C1 interconnects the fourth coupling member 21 with the third planet carrier 15; the second clutch C2 interconnects the first ring gear 6 with the second planet carrier 12;

Its specific implementation process is:

Pure electric mode: by engaging the first brake B1, the motor 4 starts, the third ring gear 14 is connected to the transmission case 5 by the first brake B1, the rotation of the third ring gear 14 is prevented, and the third planetary gear (16) and The third sun gear 17 is engaged to directly transmit the power from the electric motor 4 to the output shaft 2, thus, only the electric motor 4 is used as the power input source, and the transmission is in pure electric mode at this time.

Input split mode: by engaging the first brake B1, the engine, the generator 3, and the motor 4 are started, and the third ring gear 14 is connected to the transmission housing 5 by the first brake B1, preventing the rotation of the third ring gear 14. At this time, The engine drives the first ring gear 6 to rotate, and further drives the first sun gear 8 to rotate through the first planetary gear 7. The generator 3 converts mechanical energy into electrical energy to supply power to the external battery. The motor 4 is used as the main power input source to drive the vehicle. The engine power is mainly The generator 3 is energized, thereby input split mode.

Compound split mode: By engaging the first brake B1 and the first clutch C1, the engine, generator 3, and electric motor 4 are started, and the third ring gear 14 is connected to the transmission case 5 by the first brake B1, preventing the third ring gear 14 from Rotate, the second ring gear 10 is connected with the third planetary carrier 15, at this time, the engine and the motor 4 are used as power input sources to drive the vehicle, and the generator 3 charges the external battery at the same time, part of the engine power supplies energy to the generator 3, and part of the Drive the vehicle, thus in compound split mode.

Pure fuel gear 1: By engaging the first brake B1 and the first clutch C1, the engine starts, and the third ring gear 14 is connected to the transmission case 5 by the first brake B1, preventing the rotation of the third ring gear 14, and the second gear The ring 10 is connected with the third planetary carrier 15, and a transmission ratio of first gear is established between the input shaft 1 and the output shaft 2.

Pure fuel gear 2: By engaging the first clutch C1 and the second clutch C2, the engine starts, the second ring gear 10 and the third planet carrier 15 are connected, the first ring gear 6, the first planetary gear 7, and the second planetary gear 11 and the second sun gear 13 rotate at the same speed, and a second gear transmission ratio is established between the input shaft 1 and the output shaft 2, that is, a direct gear.

Pure fuel gear three: By engaging the first clutch C1 and the second brake B2, the engine starts, the first sun gear 9 is connected to the transmission case 5 by the second brake B2, and the rotation of the first sun gear 9 is prevented, and the second gear The ring 10 is connected to the third planet carrier 15, and a third-gear transmission ratio is established between the input shaft 1 and the output shaft 2,

Among them, the working logic tables of the first clutch C1, the second clutch C2, the first brake B1 and the second brake B2 are shown in Table 1:

Table 1: Working logic table

model engine dynamo electric motor first brake second brake first clutch second clutch pure electric mode √ √ input shunt √ √ √ √ Compound shunt √ √ √ √ √ first gear √ √ √ second gear √ √ √ third gear √ √ √

In this embodiment, the first clutch C1 and the second clutch C2 are multi-plate wet clutches or jaw clutches, and the first brake B1 and the second brake B2 are drum brakes or multi-plate wet brakes.

In this article, the orientation words such as front, rear, upper, and lower involved are defined by the parts in the drawings and the positions between the parts in the drawings, just for the clarity and convenience of expressing the technical solution. It should be understood that the use of the location words should not limit the scope of protection claimed in this application.

In the case of no conflict, the above-mentioned embodiments and features in the embodiments herein may be combined with each other.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (4)

1. A multi-gear dual-mode hybrid transmission is characterized by comprising a transmission shell, an input shaft (1), a generator (3), a motor (4), a connecting output shaft (2), a planetary gear row group, a connecting component group and a torque transmission device, wherein the input shaft, the generator (3), the motor (4), the connecting output shaft, the planetary gear row group, the connecting component group and the torque transmission device are arranged in the transmission shell,

the input shaft (1) is connected with an engine;

the planetary gear row set comprises a first planetary gear row, a second planetary gear row and a third planetary gear row which are sequentially arranged from front to back, the torque transmission device comprises a first clutch (C1), a second clutch (C2), a first brake (B1) and a second brake (B2), and the first brake (B1) and the second brake (B2) are fixedly connected with a transmission shell (5);

the first planetary gear row is composed of a first gear ring (6), a first planetary gear (7), a first planet carrier (8) and a first sun gear (9), the first sun gear (9) and the first planetary gear (7) are in external meshing transmission, the first planetary gear (7) and the first gear ring (6) are in internal meshing transmission, and the first planetary gear (7) is rotatably supported on the first planet carrier (8);

the second planetary gear row is composed of a second gear ring (10), a second planetary gear (11), a second planet carrier (12) and a second sun gear (13), the second sun gear (13) and the second planetary gear (11) are in external meshing transmission, the second planetary gear (11) and the second gear ring (10) are in internal meshing transmission, and the second planetary gear (11) is rotatably supported on the second planet carrier (12);

the third planetary gear row is composed of a third gear ring (14), a third planetary gear (16), a third planet carrier (15) and a third sun gear (17), the third sun gear (17) and the third planetary gear (16) are in external meshing transmission, the third planetary gear (16) and the third gear ring (14) are in internal meshing transmission, and the third planetary gear (16) is rotationally supported on the third planet carrier (15);

the coupling member group comprises a first coupling member (18), a second coupling member (19), a third coupling member (20) and a fourth coupling member (21);

the first coupling member (18) interconnecting the first ring gear (6) and the second planet carrier (12), the second coupling member (19) interconnecting the first clutch (C2) and the second sun gear (13), the third coupling member (20) interconnecting the second sun gear and the third sun gear, the fourth coupling member (21) interconnecting the second ring gear (10) and the third planet carrier (15);

the first brake (B1) interconnecting the third ring gear (14) with the transmission housing (5), the second brake (B2) interconnecting the first sun gear (9) with the transmission housing (5);

the first clutch (C1) interconnecting the fourth coupling member (21) with the third carrier (15); the second clutch (C2) interconnecting the first ring gear (6) with the second planet carrier (12);

the first clutch (C1), the second clutch (C2), the first brake (B1) and the second brake (B2) are selectively engaged to cooperate with different working modes of an engine, a generator (3) and a motor (4) so as to establish a multi-gear transmission mode between the input shaft (1) and the output shaft (2).

2. The multi-range, dual-mode, hybrid transmission of claim 1, wherein: the operating modes of the transmission include: a pure electric working mode;

the pure electric mode is as follows:

the motor (4) is started, the first brake (B1) is engaged, the transmission enters a pure electric working state, and the output shaft (2) is driven by pure electric.

3. The multi-range, dual-mode, hybrid transmission of claim 2, wherein: the operating modes of the transmission also include hybrid modes, including an input-split operating mode and a compound-split operating mode;

wherein, the input shunting working mode is as follows: the engine is started, the generator (3) is started, the motor (4) is started, the first brake (B1) is engaged, the transmission enters an input-split working state, and the output shaft (2) is driven by mixed power;

a compound split operating mode; the engine is started, the generator (3) is started, the motor (4) is started, the first clutch (C1) is engaged, the transmission enters a compound split working state, and the output shaft (2) is driven by mixed power.

4. The multi-range, dual-mode, hybrid transmission of claim 2, wherein: the operating modes of the transmission also include a fuel only mode;

the pure fuel mode comprises a first-gear working mode, a second-gear working mode and a third-gear working mode,

wherein, one keeps off the mode and does: starting the engine, and establishing a first gear transmission ratio between the input shaft and the output shaft by engaging the first clutch (C1) and the first brake (B1);

the two-stage working mode is as follows: starting the engine, by engaging the first clutch (C1), the second clutch (C2), to establish a second gear ratio between the input shaft and the output shaft;

the three-gear working mode is as follows: the engine is started, and a third gear transmission ratio is established between the input shaft and the output shaft by engaging the second brake (B2) and the first clutch (C1).

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