Multi-gear Hybrid Power Transmission System and Method

Abstract

The present invention discloses a multi-gear hybrid power transmission system and method. Among them, the system includes: a plurality of brakes, the first ends of the brakes are fixed to the housing; a plurality of clutches, the first ends of the clutches are connected to the wheel ends of the vehicle through an output shaft; a planetary gear set, the first end of the planetary gear set is connected to the output end of the motor, the second end of the planetary gear set is connected to the second end of the brake, and the third end of the planetary gear set is connected to the second end of the clutch, and is used to transmit different powers output by the motor to the wheel ends by combining different brakes and different clutches. The present invention solves the technical problem of high requirements for the performance of the motor in the related art.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control, and more particularly, to a multi-gear hybrid power transmission system and method. Background Art

[0002] With the continuous improvement of people's awareness of energy conservation and emission reduction, conventional gasoline vehicles are difficult to meet people's needs due to structural limitations. As a new type of vehicle power, hybrid vehicles play an extremely important role in the drive unit.

[0003] However, current hybrid transmissions are limited by their structure, with a single structure. The adjustment of vehicle speed and load capacity depends entirely on the motor, resulting in a high requirement for the motor level.

[0004] In view of the above problems, no effective solution has been proposed yet. Summary of the Invention

[0005] Embodiments of the present invention provide a multi-gear hybrid power transmission system and method to at least solve the technical problem of high requirements for motor performance in related technologies.

[0006] According to one aspect of the embodiments of the present invention, there is provided a multi-gear hybrid power transmission system, including: a plurality of brakes, the first end of each brake being fixed to a housing; a plurality of clutches, the first end of each clutch being connected to a wheel end of a vehicle through an output shaft; a planetary gear train group, the first end of the planetary gear train group being connected to an output end of a motor, the second end of the planetary gear train group being connected to the second end of the brake, and the third end of the planetary gear train group being connected to the second end of the clutch, for transmitting different powers output by the motor to the wheel end by combining different brakes and different clutches.

[0007] Further, the plurality of brakes at least includes a first brake and a second brake, the plurality of clutches at least includes a first clutch and a second clutch, and the planetary gear train group includes: a first planetary gear set, including a first sun gear, a first planetary carrier, a first external planetary gear, a first internal planetary gear, and a first external ring gear, wherein the first end of the first planetary carrier is connected to the second end of the second brake, the second end of the first planetary carrier is connected to the second end of the second clutch through a first intermediate shaft, the first sun gear is connected to the second end of the first clutch through a second intermediate shaft, and the first external ring gear is fixedly connected to the output end of the motor; a second planetary gear set, including a second sun gear, a second planetary carrier, a second planetary gear, and a second external ring gear, wherein the first end of the second planetary carrier is connected to the second end of the second brake, the second end of the second planetary carrier is connected to the second end of the second clutch through a first intermediate shaft, the second sun gear is connected to the second end of the first brake through a third intermediate shaft, and the second external ring gear is fixedly connected to the output end of the motor.

[0008] Further, the system further includes: a power generation planetary gear set, the first end of the power generation planetary gear set is connected to the engine through an input shaft and a coupler, and the second end of the power generation planetary gear set is connected to the input end of the motor, and is configured to transmit the power output by the engine to the motor.

[0009] Further, the power generation planetary gear set includes a third sun gear, a third planet carrier, third planet gears and a third ring gear. Among them, the third ring gear is connected to the input end of the motor through a one-way clutch, the third sun gear is fixed on the housing, and the third planet carrier is connected to the engine through an input shaft and a coupler.

[0010] According to another aspect of the embodiments of the present invention, there is also provided a multi-gear hybrid power transmission method, including: in response to receiving a driving instruction, controlling the engine to operate, and determining a target gear corresponding to the driving instruction; based on the target gear, determining the operating states of the brake and the clutch; controlling the brake based on the operating state of the brake, and controlling the clutch based on the operating state of the clutch.

[0011] According to a third aspect of the embodiments of the present invention, there is also provided a multi-gear hybrid power transmission device, including: a receiving module, configured to control the engine to operate in response to receiving a driving instruction, and determine a target gear corresponding to the driving instruction; a determining module, configured to determine the operating states of the brake and the clutch based on the target gear; a control module, configured to control the brake based on the operating state of the brake, and control the clutch based on the operating state of the clutch.

[0012] According to a fourth aspect of the embodiments of the present invention, there is also provided a non-volatile storage medium, which includes a stored program. When the program runs, it controls the processor of the device where it is located to execute the above multi-gear hybrid power transmission method.

[0013] According to a fifth aspect of the embodiments of the present invention, there is also provided a vehicle, including: one or more processors; a storage device, configured to store one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors execute the above multi-gear hybrid power transmission method.

[0014] In an embodiment of the present invention, a multi-gear hybrid power transmission system is provided, including: a plurality of brakes, with the first end of the brake fixed to the housing; a plurality of clutches, with the first end of the clutch connected to the wheel end of the vehicle through an output shaft; a planetary gear train set, with the first end of the planetary gear train set connected to the output end of the motor, the second end of the planetary gear train set connected to the second end of the brake, and the third end of the planetary gear train set connected to the second end of the clutch, for transmitting different powers output by the motor to the wheel end by combining different brakes and different clutches. It is easy to notice that by combining the working states of the plurality of brakes and the plurality of clutches in different ways, and thus controlling the planetary gear train set according to different combination results, the purpose of multi-gear control of the motor is achieved, the technical effect of reducing the high requirements for the performance of the motor in gear control of the motor is achieved, and furthermore, the technical problem of relatively high requirements for the performance of the motor in the related art is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0016] Figure 1 is a schematic diagram of the overall architecture of a multi-gear hybrid power transmission system according to an embodiment of the present invention;

[0017] Figure 2 is a schematic diagram of the structure of an optional multi-gear hybrid power transmission system according to an embodiment of the present invention;

[0018] Figure 3 is a flowchart of a multi-gear hybrid power transmission method according to an embodiment of the present invention;

[0019] Figure 4 is a schematic diagram of an optional first-gear structure according to an embodiment of the present invention;

[0020] Figure 5 is a schematic diagram of an optional second-gear structure according to an embodiment of the present invention;

[0021] Figure 6 is a schematic diagram of an optional third-gear structure according to an embodiment of the present invention;

[0022] Figure 7 is a schematic diagram of an optional fourth-gear structure according to an embodiment of the present invention;

[0023] Figure 8 is a schematic diagram of an optional gear according to an embodiment of the present invention;

[0024] Figure 9Schematic diagram of an optional parking power generation mode structure according to an embodiment of the present invention;

[0025] Figure 10 Schematic diagram of a multi-gear hybrid power transmission device according to an embodiment of the present invention. Detailed implementation manners

[0026] Currently in this field, the mainstream structure is a dual-motor and planetary gear set coupling structure, and multi-gear functions are realized through actuator mechanisms such as clutches and brakes. However, there are still the following problems:

[0027] 1. In the dual-motor structure, one is a driving motor and the other is a power generation motor, which has a certain degree of redundancy in terms of structure, cost, volume, energy conservation, etc., and cannot achieve high integration, high compactness, etc.;

[0028] 2. If multi-gear is to be realized, most of the current mainstream hybrid devices use Ravigneaux planetary gear set structures, which have certain difficulties in production and manufacturing;

[0029] 3. In the field of single-motor hybrid devices, in some hybrid devices, there is a condition where the driving motor drags the engine in reverse, which to a certain extent reduces the service life of the engine and also causes a certain amount of energy loss.

[0030] To solve the above technical problems, the present invention provides a single-motor planetary multi-gear hybrid power device, providing a hybrid vehicle transmission device based on a planetary gear set and single-motor drive. The device consists of one motor, two brakes, two clutches, one one-way clutch, and three planetary gear sets. Different combinations of brakes and clutches can achieve four gears for the vehicle, in-motion energy recovery mode, and parking power generation mode. The three planetary gear sets can be divided into two groups of power output planetary gear sets and one group of power generation planetary gear sets. The two power output planetary gear train systems can independently design the transmission ratio. The planetary gear set structure is simple, with the characteristics of high transmission efficiency, low component rotation speed, and large transmission ratio.

[0031] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present invention are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily limit to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0033] Embodiment 1

[0034] According to an embodiment of the present invention, an embodiment of a multi-gear hybrid power transmission system is provided. Figure 1 is a schematic diagram of the overall architecture of a multi-gear hybrid power transmission system according to an embodiment of the present invention, as Figure 1 shown, the system includes:

[0035] A plurality of brakes, the first end of the brake is fixed on the housing;

[0036] Specifically, the above-mentioned brake is arranged inside the hybrid power transmission system, and the first end of the brake is fixed on the housing for braking the vehicle.

[0037] A plurality of clutches, the first end of the clutch is connected to the wheel end of the vehicle through the output shaft;

[0038] Specifically, the above-mentioned clutch is arranged inside the hybrid power transmission system, and the first end of the clutch is connected to the wheel end of the vehicle through the output shaft for transmitting power to the wheel end of the vehicle.

[0039] A planetary gear set, the first end of the planetary gear set is connected to the output end of the motor, the second end of the planetary gear set is connected to the second end of the brake, and the third end of the planetary gear set is connected to the second end of the clutch, for combining different brakes and different clutches to transmit different powers output by the motor to the wheel end.

[0040] Specifically, the above planetary gear set is disposed inside the hybrid power transmission system. The first end of the planetary gear set is connected to the output end of the motor for receiving the power output by the motor. The second end of the planetary gear set is connected to the second end of the brake for driving the brake. The third end of the planetary gear set is connected to the second end of the clutch for driving the clutch. By combining different combinations of engaged and disengaged states of different brakes and different clutches, different powers output by the motor can be transmitted to the wheel end through the output shaft O.

[0041] Optionally, the multiple brakes at least include a first brake and a second brake, and the multiple clutches at least include a first clutch and a second clutch. The planetary gear set includes: a first planetary gear set including a first sun gear, a first planetary carrier, a first outer planetary gear, a first inner planetary gear, and a first outer ring gear. The first end of the first planetary carrier is connected to the second end of the second brake, the second end of the first planetary carrier is connected to the second end of the second clutch through a first intermediate shaft, the first sun gear is connected to the second end of the first clutch through a second intermediate shaft, and the first outer ring gear is fixedly connected to the output end of the motor; a second planetary gear set including a second sun gear, a second planetary carrier, a second planetary gear, and a second outer ring gear. The first end of the second planetary carrier is connected to the second end of the second brake, the second end of the second planetary carrier is connected to the second end of the second clutch through a first intermediate shaft, the second sun gear is connected to the second end of the first brake through a third intermediate shaft, and the second outer ring gear is fixedly connected to the output end of the motor.

[0042] Specifically, the above planetary gear set includes a first planetary gear set and a second planetary gear set. The first planetary gear set and the second planetary gear set are disposed at the output port of the motor. The first planetary gear set is connected to the second end of the clutch through a first intermediate shaft L, and the second planetary gear set is connected to the second end of the brake through a third intermediate shaft N.

[0043] Figure 2 It is a schematic structural diagram of an optional multi-gear hybrid power transmission system according to an embodiment of the present invention. As Figure 2 shown, the above first planetary gear set includes a first sun gear S1, a first planetary carrier H1, a first outer planetary gear P1A, a first inner planetary gear P1B, and a first outer ring gear R1. The first end of the first planetary carrier H1 is connected to the second end of the second brake B2, the second end of the first planetary carrier H1 is connected to the second end of the second clutch E through a first intermediate shaft L, and the first sun gear S1 is connected to the second end of the first clutch D through a second intermediate shaft M. The first outer ring gear is fixedly connected to the output end of the motor EM1.

[0044] As Figure 2As shown, the above-mentioned second planetary gear set includes a second sun gear S2, a second planet carrier H2, second planet gears P2, and a second ring gear R2. Among them, the first end of the second planet carrier H2 is connected to the second end of the second brake B2, the second end of the second planet carrier H2 is connected to the second end of the second clutch E through a first intermediate shaft L, the second sun gear S2 is connected to the second end of the first brake B1 through a third intermediate shaft N, and the second ring gear R2 is fixedly connected to the output end of the motor EM1.

[0045] Optionally, the system further includes: a power generation planetary gear set. The first end of the power generation planetary gear set is connected to the engine through an input shaft and a coupler, and the second end of the power generation planetary gear set is connected to the input end of the motor for transmitting the power output by the engine to the motor.

[0046] Specifically, the above-mentioned power generation planetary gear set is disposed inside the hybrid power transmission system and is fixedly connected to the input end of the motor EM1. Among them, the first end of the power generation planetary gear set is connected to the engine through an input shaft S and a coupler, and the second end of the power generation planetary gear set is connected to the input end of the motor EM1 through a one-way clutch OWC for transmitting the power output by the engine to the motor EM1.

[0047] At the same time, the output end of the above-mentioned input shaft S is connected to the rotor of the motor EM1 through the above-mentioned power generation planetary gear set, and the first end of the rotor of the motor EM1 is fixedly connected to the first ring gear R1 and the second ring gear R2.

[0048] Optionally, the power generation planetary gear set includes a third sun gear, a third planet carrier, third planet gears, and a third ring gear. Among them, the third ring gear is connected to the input end of the motor through a one-way clutch, the third sun gear is fixed on the housing, and the third planet carrier is connected to the engine through an input shaft and a coupler.

[0049] Specifically, as Figure 2 shown, the above-mentioned power generation planetary gear set includes a third sun gear S3, a third planet carrier H3, third planet gears P3, and a third ring gear R3. Among them, the third ring gear R3 is connected to the input end of the motor EM1 through a one-way clutch OWC, the third sun gear is fixed on the housing, and the third planet carrier H3 is connected to the engine through an input shaft S and a coupler.

[0050] In summary, by providing a multi-gear hybrid power transmission system, including: a plurality of brakes, the first ends of the brakes are fixed on the housing; a plurality of clutches, the first ends of the clutches are connected to the wheel ends of the vehicle through an output shaft; a planetary gear train group, the first end of the planetary gear train group is connected to the output end of the motor, the second end of the planetary gear train group is connected to the second end of the brake, and the third end of the planetary gear train group is connected to the second end of the clutch, which is used to combine different brakes and different clutches to transmit different powers output by the motor to the wheel ends. It is easy to notice that by combining the working states of a plurality of brakes and a plurality of clutches in different ways, the planetary gear train group is controlled according to different combination results, achieving the purpose of multi-gear control of the motor, achieving the technical effect of reducing the high requirements for the motor performance in the gear control of the motor, and thus solving the technical problem of relatively high requirements for the motor performance in the related art.

[0051] Embodiment 2

[0052] According to an embodiment of the present invention, an embodiment of a multi-gear hybrid power transmission method is provided. This method is applied to a multi-gear hybrid power transmission system provided in the above Embodiment 1. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0053] Figure 3 is a flowchart of a multi-gear hybrid power transmission method according to an embodiment of the present invention. As Figure 3 shown, the method includes the following steps:

[0054] Step S302, in response to receiving a driving instruction, control the engine to work and determine the target gear corresponding to the driving instruction;

[0055] Specifically, the above driving instruction can be used to represent an instruction for driving the vehicle sent by the main controller of the vehicle.

[0056] The above target gear can be used to represent the control gear for driving the vehicle, which can be the first gear, or the second gear, the third gear, etc. The target gear is not specifically limited here.

[0057] Among them, the working states of the brakes and clutches corresponding to different target gears are different, and the target gear is consistent with the above driving instruction. Exemplarily, in response to the driving instruction being characterized as driving control of the vehicle in the first gear, the corresponding target gear is characterized as the first gear, etc.

[0058] In an alternative embodiment, after receiving a driving instruction of the vehicle, the engine is controlled to operate, and at the same time, the power of the engine is transmitted to the wheel ends of the vehicle through the above multi-gear hybrid power transmission system to drive the vehicle in the target gear.

[0059] Step S304: Determine the operating states of the brake and the clutch based on the target gear.

[0060] Specifically, the above-mentioned operating states can be used to represent the operating states of the brake and the clutch, and can be either a combined state or a disengaged state. The operating states are not specifically limited herein. Among them, different target gears correspond to different operating states of the brake and the clutch.

[0061] In an alternative embodiment, after determining the target gear, it is necessary to determine the operating states of the brake and the clutch according to the target gear. Exemplarily, in response to the target gear being the first gear, the operating state of the corresponding first brake B1 is the combined state, and the operating state of the second clutch E is the combined state. Conversely, the operating states of the second brake B2 and the first clutch D are the disengaged states. The above is only an exemplary illustration, and the target gear and the corresponding operating states of the brake and the clutch are not uniquely limited herein.

[0062] Step S306: Control the brake based on the operating state of the brake and control the clutch based on the operating state of the clutch.

[0063] Specifically, after determining the operating states of the brake and the clutch, it is necessary to control the brake through the operating state of the brake and control the clutch through the operating state of the clutch. Exemplarily, in response to the operating state of the first brake B1 being the combined state, control the first brake B1 to be combined; in response to the operating state of the second clutch E being the combined state, control the second clutch E to be combined; in response to the operating states of the second brake B2 and the first clutch D being the disengaged states, control the second brake B2 and the first clutch D to be disengaged, etc.

[0064] In summary, by responding to the received driving instruction, controlling the engine to operate, and determining the target gear corresponding to the driving instruction; determining the operating states of the brake and the clutch based on the target gear; controlling the brake based on the operating state of the brake and controlling the clutch based on the operating state of the clutch. It is easy to note that after determining the target gear corresponding to the driving instruction, the operating states of the brake and the clutch corresponding to the target gear can be obtained, and then the brake and the clutch can be controlled respectively according to the operating states of the brake and the clutch, achieving the purpose of multi-gear control of the vehicle.

[0065] In addition, by arranging an OWC (One Way Clutch) between the motor EM1 and the engine, when the engine speed is higher than the motor speed, the one-way clutch OWC engages, enabling the transfer of engine power in the direction of the motor; when the motor speed is higher than the engine speed, the one-way clutch OWC disengages, preventing the motor from dragging the engine in reverse and causing energy loss.

[0066] Optionally, the plurality of brakes at least includes a first brake and a second brake, and the plurality of clutches at least includes a first clutch and a second clutch. Determining the working states of the brakes and the clutches based on the target gear includes: in response to the target gear being the first gear, determining that the working states of the first brake and the second clutch are engaged states, and the working states of the second brake and the first clutch are disengaged states; in response to the target gear being the second gear, determining that the working states of the first clutch and the second clutch are engaged states, and the working states of the first brake and the second brake are disengaged states; in response to the target gear being the third gear, determining that the working states of the first brake and the first clutch are engaged states, and the working states of the second brake and the second clutch are disengaged states; in response to the target gear being the fourth gear, determining that the working states of the second brake and the first clutch are engaged states, and the working states of the first brake and the second clutch are disengaged states.

[0067] Specifically, the above-mentioned first gear can be used to represent the gear corresponding to the engaged states of the first brake and the second clutch.

[0068] The above-mentioned second gear can be used to represent the gear corresponding to the engaged states of the first clutch and the second clutch.

[0069] The above-mentioned third gear can be used to represent the gear corresponding to the engaged states of the first brake and the first clutch.

[0070] The above-mentioned fourth gear can be used to represent the gear corresponding to the engaged states of the second brake and the first clutch.

[0071] In an optional embodiment, Figure 4 is a schematic diagram of an optional first-gear structure according to an embodiment of the present invention. As Figure 4As shown, in response to the target gear being the first gear, determine that the operating states of the first brake and the second clutch are engaged states, and the operating states of the second brake and the first clutch are disengaged states, that is, the first brake B1 and the second clutch E are engaged. When the first brake B1 is engaged, the second sun gear S2 is braked, and the power of the motor EM1 is output to the second outer gear ring R2 via the rotor, driving the second planet carrier H2 to rotate. The power is output to the second clutch E via the first intermediate shaft L. When the second clutch E is engaged, the power is transmitted to the wheel end via the output shaft O.

[0072] In another alternative embodiment, Figure 5 is a schematic diagram of an alternative second-gear structure according to an embodiment of the present invention. As Figure 5 shown, in response to the target gear being the second gear, determine that the operating states of the first clutch and the second clutch are engaged states, and the operating states of the first brake and the second brake are disengaged states, that is, the first clutch D and the second clutch E are engaged. When the first clutch D and the second clutch E are engaged, the first planet carrier H1 and the first sun gear S1 rotate at the same speed. The power of the motor EM1 is input from the first outer gear ring R1, and the first planetary gear set operates as a whole, transmitting the power to the output shaft 0 via the first clutch D and the second clutch E, and finally outputting it to the wheel end.

[0073] In a third alternative embodiment, Figure 6 is a schematic diagram of an alternative third-gear structure according to an embodiment of the present invention. As Figure 6 shown, in response to the target gear being the third gear, determine that the operating states of the first brake and the first clutch are engaged states, and the operating states of the second brake and the second clutch are disengaged states, that is, the first brake B1 and the first clutch D are engaged. When the first brake B1 is engaged, the second sun gear S2 is braked. The power of the motor EM1 is input via the second outer gear ring R2, and the second planet carrier H2 outputs a fixed speed and torque to the first planet carrier H1. At the same time, the power of the motor EM1 is input via the first outer gear ring R1 and coupled with the power of the first planet carrier H1, making the first sun gear S1 rotate uniquely. When the first clutch D is engaged, the first sun gear S1 is connected to the output shaft O, transmitting the power to the wheel end.

[0074] In a fourth alternative embodiment, Figure 7 is a schematic diagram of an alternative fourth-gear structure according to an embodiment of the present invention. As Figure 7As shown, in response to the target gear being the fourth gear, determine that the operating states of the second brake and the first clutch are engaged states, and the operating states of the first brake and the second clutch are disengaged states, that is, the second brake B2 and the first clutch D are engaged. When the second brake B2 is engaged, the first planetary carrier is braked, and the power of the motor EM1 is input via the first external gear ring R1 and acts on the first planetary gear set, causing the first sun gear S1 to rotate uniquely. When the first clutch D is engaged, the first sun gear S1 is connected to the output shaft O, and the power is transmitted to the wheel end.

[0075] Figure 8 It is an optional gear schematic diagram according to an embodiment of the present invention. As Figure 8 shown, different target gears correspond to different operating states of the first brake B1, the second brake B2, the first clutch D, and the second clutch E. Among them, the solid black circle represents that the corresponding brake or clutch is in the engaged state, and vice versa, it is in the disengaged state.

[0076] Optionally, the method further includes: in response to receiving a parallel operation instruction, controlling the engine to operate; transmitting the power output by the engine to the motor through the power generation planetary gear set.

[0077] Specifically, the above parallel operation instruction can be used to represent an instruction corresponding to the parallel drive of the engine and the motor for the vehicle.

[0078] In an optional embodiment, in response to receiving a parallel operation instruction for the engine and the motor of the vehicle, the engine power can act on the third planetary carrier H3 in the power generation planetary gear set via the input shaft S. The third sun gear S3 is fixed, and the power is output from the third external gear ring R3 to the motor EM1 via the one-way clutch OWC and then participates in the drive.

[0079] Optionally, the method further includes: in response to receiving a braking instruction, applying excitation to the motor through the motor controller; transmitting the current output by the motor to the battery.

[0080] Specifically, the above braking instruction can be used to represent an instruction corresponding to the braking control of the vehicle.

[0081] In an optional embodiment, in response to receiving a braking instruction, when the driver steps on the brake pedal, the system detects the driver's intention to decelerate, and through the motor controller, adjusts the operating state of the motor in each mode, changing from the power output state to the counter-dragging torque state, thereby providing a load and converting magnetic energy into electrical energy. The current flows from the motor to the battery, forming an energy recovery mode during driving.

[0082] Optionally, the method further includes: controlling the engine to operate in response to receiving a power generation instruction; transmitting the power output by the engine to the motor through a power generation planetary gear set to control the motor to generate power; and transmitting the current output by the motor to the battery.

[0083] Specifically, the above-mentioned power generation instruction can be used to represent an instruction for charging the vehicle's battery when the vehicle stops and the engine idles.

[0084] In an alternative embodiment, when the vehicle stops and the engine idles, power is transmitted from the engine through the input shaft S to the third planet carrier H3, driving the third planet gear P3. Since the third sun gear S3 is fixedly connected to the transmission housing, the operation mode of the third ring gear R3 is unique. Power is transmitted from the third ring gear R3 to the motor EM1 to generate power, and the current flows from the motor to the battery.

[0085] In summary, the present invention uses a single motor coupled with a planetary gear set structure, and through different combinations of brakes and clutches, a multi-gear power device is realized, reducing the excessive requirements for the performance of the motor. At the same time, it also has the following beneficial effects:

[0086] 1. The present invention can not only achieve the electric vehicle driving mode through only one motor structure, but also has the ability of energy recovery and parking power generation;

[0087] 2. The present invention uses two simple planetary gear sets at the driving end, avoiding the use of Ravigneaux structure, and has simplicity and cost advantages in production and manufacturing;

[0088] 3. In the present invention, by arranging an OWC between the motor and the engine, the power can be output from the engine to the motor and the driving end, and the condition of the motor dragging the engine in reverse can be avoided, improving the efficiency of the system and reducing the engine usage loss.

[0089] Embodiment 3

[0090] According to an embodiment of the present invention, there is also provided a multi-gear hybrid power transmission device, which can execute a multi-gear hybrid power transmission method provided in the above Embodiment 2. The specific implementation manner and preferred application scenario are the same as those in the above Embodiment 2, and will not be elaborated here.

[0091] Figure 10 is a schematic diagram of a multi-gear hybrid power transmission device according to an embodiment of the present invention, as Figure 10 shown, the device includes:

[0092] A receiving module 1002, configured to control the engine to operate in response to receiving a driving instruction, and determine a target gear corresponding to the driving instruction;

[0093] A determination module 1004, configured to determine the operating states of a brake and a clutch based on a target gear position;

[0094] A control module 1006, configured to control the brake based on the operating state of the brake and control the clutch based on the operating state of the clutch.

[0095] Optionally, the determination module 1004 includes: a first determination module, configured to, in response to the target gear position being a first gear position, determine that the operating states of a first brake and a second clutch are engaged states, and the operating states of a second brake and a first clutch are disengaged states; a second determination module, configured to, in response to the target gear position being a second gear position, determine that the operating states of the first clutch and the second clutch are engaged states, and the operating states of the first brake and the second brake are disengaged states; a third determination module, configured to, in response to the target gear position being a third gear position, determine that the operating states of the first brake and the first clutch are engaged states, and the operating states of the second brake and the second clutch are disengaged states; a fourth determination module, configured to, in response to the target gear position being a fourth gear position, determine that the operating states of the second brake and the first clutch are engaged states, and the operating states of the first brake and the second clutch are disengaged states.

[0096] Optionally, the device further includes: a first control module, configured to control the engine to operate in response to receiving a parallel operation instruction; a first transmission module, configured to transmit the power output by the engine to a motor through a power generation planetary gear set.

[0097] Optionally, the device further includes: an application module, configured to apply excitation to the motor through a motor controller in response to receiving a braking instruction; a first transfer module, configured to transfer the current output by the motor to a battery.

[0098] Optionally, the device further includes: a second control module, configured to control the engine to operate in response to receiving a power generation instruction; a second transmission module, configured to transmit the power output by the engine to the motor through the power generation planetary gear set to control the motor to generate power; a second transfer module, configured to transfer the current output by the motor to the battery.

[0099] Embodiment 4

[0100] According to an embodiment of the present invention, there is also provided a non-volatile storage medium, which includes a stored program, wherein, when the program runs, it controls a processor of a device where it is located to execute the above multi-gear hybrid power transmission method.

[0101] Embodiment 5

[0102] According to an embodiment of the present invention, there is also provided a vehicle, including: one or more processors; a storage device for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors execute the above multi-gear hybrid power transmission method.

[0103] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0104] In the above embodiments of the present invention, the descriptions of the respective embodiments have their own emphases. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0105] In the several embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the units or modules can be in electrical or other forms.

[0106] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place, or they can be distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0107] In addition, the functional units in the various embodiments of the present invention can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0108] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), mobile hard disks, magnetic disks, or optical discs.

[0109] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A multi-gear hybrid power transmission system, characterized in that, Including: A plurality of brakes, with the first ends of the brakes fixed to the housing; A plurality of clutches, with the first ends of the clutches connected to the wheel ends of the vehicle through an output shaft; A planetary gear train group, with the first end of the planetary gear train group connected to the output end of the motor, the second end of the planetary gear train group connected to the second end of the brake, and the third end of the planetary gear train group connected to the second end of the clutch, for transmitting different powers output by the motor to the wheel ends by combining different brakes and different clutches; Wherein, the plurality of brakes at least includes a first brake and a second brake, the plurality of clutches at least includes a first clutch and a second clutch, and the planetary gear train group includes: A first planetary gear set, including a first sun gear, a first planetary carrier, a first external planetary gear, a first internal planetary gear, and a first external gear ring. Wherein, the first end of the first planetary carrier is connected to the second end of the second brake, the second end of the first planetary carrier is connected to the second end of the second clutch through a first intermediate shaft, the first sun gear is connected to the second end of the first clutch through a second intermediate shaft, and the first external gear ring is fixedly connected to the output end of the motor; A second planetary gear set, including a second sun gear, a second planetary carrier, a second planetary gear, and a second external gear ring. Wherein, the first end of the second planetary carrier is connected to the second end of the second brake, the second end of the second planetary carrier is connected to the second end of the second clutch through the first intermediate shaft, the second sun gear is connected to the second end of the first brake through a third intermediate shaft, and the second external gear ring is fixedly connected to the output end of the motor; A power generation planetary gear set, with the first end of the power generation planetary gear set connected to the engine through an input shaft and a coupler, and the second end of the power generation planetary gear set connected to the input end of the motor, for transmitting the power output by the engine to the motor.

2. The multi-gear hybrid power transmission system according to claim 1, wherein The power generation planetary gear set includes a third sun gear, a third planetary carrier, a third planetary gear, and a third external gear ring. Wherein, the third external gear ring is connected to the input end of the motor through a one-way clutch, the third sun gear is fixed to the housing, and the third planetary carrier is connected to the engine through the input shaft and the coupler.

3. A multi-gear hybrid power transmission method, characterized in that, The multi-gear hybrid power transmission method is applied to the multi-gear hybrid power transmission system according to any one of claims 1 to 2. The multi-gear hybrid power transmission method includes: In response to receiving a driving instruction, controlling the engine to work and determining the target gear corresponding to the driving instruction; Based on the target gear, determining the working states of the brakes and the clutches; Controlling the brakes based on the working states of the brakes and controlling the clutches based on the working states of the clutches.

4. The multi-gear hybrid power transmission method according to claim 3, wherein The plurality of brakes at least includes a first brake and a second brake, the plurality of clutches at least includes a first clutch and a second clutch. Based on the target gear, determining the working states of the brakes and the clutches includes: In response to the target gear being the first gear, determine that the operating states of the first brake and the second clutch are engaged states, and the operating states of the second brake and the first clutch are disengaged states; In response to the target gear being the second gear, determine that the operating states of the first clutch and the second clutch are engaged states, and the operating states of the first brake and the second brake are disengaged states; In response to the target gear being the third gear, determine that the operating states of the first brake and the first clutch are engaged states, and the operating states of the second brake and the second clutch are disengaged states; In response to the target gear being the fourth gear, determine that the operating states of the second brake and the first clutch are engaged states, and the operating states of the first brake and the second clutch are disengaged states.

5. The multi-gear hybrid power transmission method according to claim 3, characterized in that, Further includes: In response to receiving a parallel operation instruction, control the engine to operate; Transmit the power output by the engine to the motor through the power generation planetary gear set.

6. The multi-gear hybrid power transmission method according to claim 3, wherein Further includes: In response to receiving a braking instruction, apply excitation to the motor through the motor controller; Transmit the current output by the motor to the battery.

7. The multi-gear hybrid power transmission method according to claim 3, characterized in that Further includes: In response to receiving a power generation instruction, control the engine to operate; Transmit the power output by the engine to the motor through the power generation planetary gear set to control the motor to generate electricity; Transmit the current output by the motor to the battery.

8. A vehicle, characterized in that, Includes: The multi-gear hybrid power transmission system according to any one of claims 1 to 2.

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