Automobile hybrid power system

Abstract

The invention discloses an automobile hybrid power system which comprises an engine, a first brake, a second brake, a third brake, a first clutch, a second clutch, a motor, a planetary gear mechanism and an output gear mechanism. According to the automobile hybrid power system, the engine and the motor are connected through the planetary gear mechanism, meanwhile, power output is conducted through the output gear mechanism, three driving modes of a pure electric driving mode, a range extending power generation mode and a hybrid power mode can be achieved, and stepless speed regulation is achieved while torque output is conducted; the three driving modes can be freely switched in a full vehicle speed range; a pure electric drive mode, a range extending mode, a power dividing mode and two direct drive modes with different speed ratios can be achieved, loss is reduced, and the efficiency of an automobile hybrid power system is improved. And only one motor is used while a multi-drive mode is realized, so that the cost is reduced, and the economic applicability of the automobile hybrid power system is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hybrid power vehicle drive transmission, and in particular to a hybrid power vehicle system. Background Art

[0002] Hybrid vehicles are a form of power system that uses a motor to combine the electric energy of a power battery with a certain form of engine to achieve vehicle drive. Hybrid vehicles have a variety of configurations to meet the different functional and performance requirements of the vehicle.

[0003] The existing hybrid range-extending system generally uses a generator connected to the engine. When the vehicle needs to replenish power, it controls the generator to replenish energy. This engine-generator range-extending system can generally only generate electricity and cannot meet the functional requirements of the front axle of the vehicle, especially the four-wheel drive model. The existing hybrid four-wheel drive solution generally requires a complex hybrid assembly, a transfer device and an electric rear axle to achieve a complete four-wheel drive function. The structure is complex and the cost is very high. Summary of the invention

[0004] The object of the present invention is to provide a hybrid vehicle system that can solve one or more of the above-mentioned problems in the prior art.

[0005] The automobile hybrid power system provided by the present invention comprises: an engine, a first brake, a second brake, a third brake, a first clutch, a second clutch, a motor, a planetary gear mechanism and an output gear mechanism, wherein the output shaft of the engine is connected to the planetary carrier of the planetary gear mechanism, the planetary carrier of the planetary gear mechanism is connected to the housing through the second brake, the sun gear of the planetary gear mechanism is connected to the motor shaft of the motor, the sun gear of the planetary gear mechanism is connected to the housing through the first brake, the ring gear of the planetary gear mechanism is connected to the housing through the third brake, the first clutch is connected to the planetary gear mechanism, when the first clutch is closed, the planetary carrier, the ring gear and the sun gear of the planetary gear mechanism can run at the same speed, and the ring gear of the planetary gear mechanism is connected to the output gear mechanism through the second clutch.

[0006] In some embodiments, a shock absorber is disposed on the output shaft of the engine.

[0007] In some embodiments, the ring gear of the planetary gear mechanism is connected to the planet carrier of the planetary gear mechanism through the first clutch, or the ring gear of the planetary gear mechanism is connected to the sun gear of the planetary gear mechanism through the first clutch, or the sun gear of the planetary gear mechanism is connected to the planet carrier of the planetary gear mechanism through the first clutch.

[0008] In some embodiments, the output gear mechanism includes a first gear, a second gear and a third gear, the planetary gear mechanism ring gear is connected to the first gear through a second clutch, the first gear is meshed with the second gear, the second gear is meshed with the third gear, and the third gear serves as the output end of the automobile hybrid system.

[0009] In some embodiments, the output gear mechanism is connected to the differential through an output bevel gear mechanism, and the output shaft of the differential is arranged perpendicular to the axis of the engine.

[0010] In some embodiments, the output bevel gear mechanism includes a fourth gear and a fifth gear, the fourth gear is connected to the output gear mechanism, the fourth gear is meshed with the fifth gear, and the fifth gear is connected to the differential.

[0011] In some embodiments, the output gear mechanism is connected to the differential through a transmission shaft.

[0012] In some embodiments, a first universal wheel and a second universal wheel are disposed on the transmission shaft.

[0013] In some embodiments, the output gear mechanism is connected to a differential, and the output shaft of the differential is arranged parallel to the axis of the engine.

[0014] In some embodiments, the planetary gear mechanism is disposed on a side of the electric motor remote from the engine.

[0015] The automobile hybrid power system provided by the present invention connects the engine and the motor through a planetary gear mechanism, and outputs power through an output gear mechanism at the same time, and can realize three driving modes of pure electric driving mode, extended-range power generation mode and hybrid mode, and realize stepless speed regulation while outputting torque; the three driving modes can be freely switched within the entire vehicle speed range, so that the automobile hybrid power system has greater flexibility and higher functional coverage; through the cooperation of the first brake, the second brake, the third brake, the first clutch and the second clutch, a pure electric driving mode, a range-extended mode, a power split mode and two direct drive modes with different speed ratios can be realized, so that the whole vehicle has better power performance while reducing losses and improving the efficiency of the automobile hybrid power system; only one motor is used while realizing multiple driving modes, so as to reduce costs and improve the economic applicability of the automobile hybrid power system.

[0016] In addition, in the technical solution of the present invention, unless otherwise specified, the technical solution can be implemented by adopting conventional means in the art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the structure of a hybrid power system for an automobile provided in an embodiment of the present invention.

[0019] Figure 2 A schematic structural diagram of a hybrid power system for an automobile provided in another embodiment of the present invention.

[0020] Figure 3 A schematic structural diagram of a hybrid power system for an automobile provided in another embodiment of the present invention. DETAILED DESCRIPTION

[0021] The terms "including" and "having" and any variations thereof in the present specification and claims are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or are inherent to these processes, methods, systems, products or apparatuses.

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example:

[0024] Reference Manual Attached Figure 1 An embodiment of the present invention provides an automobile hybrid power system, including: an engine 1, a first brake 2, a second brake 3, a third brake 4, a first clutch 5, a second clutch 6, a motor 7, a planetary gear mechanism 8 and an output gear mechanism.

[0025] The output shaft of the engine 1 is connected to the planet carrier P of the planetary gear mechanism 8 through the shock absorber 9, the motor shaft of the motor 7 is connected to the sun gear S of the planetary gear mechanism 8, and the ring gear R of the planetary gear mechanism 8 serves as the output end of the planetary gear mechanism 8. Thus, the engine 1 and the motor 7 are connected through the planetary gear mechanism 8, and the shock absorber 9 is connected to the output shaft of the engine 1, so that the torque fluctuation of the engine 1 or the motor 7 can be filtered.

[0026] The sun gear S of the planetary gear mechanism 8 is connected to the housing through the first brake 2, that is, one end of the first brake 2 is connected to the housing of the automobile hybrid system, and the other end is connected to the sun gear S of the planetary gear mechanism 8. Therefore, the first brake 2 can lock the sun gear S of the planetary gear mechanism 8, and when the first brake 2 is closed, the sun gear S is locked.

[0027] The planet carrier P of the planetary gear mechanism 8 is connected to the housing through the second brake 3, that is, one end of the second brake 3 is connected to the housing of the automobile hybrid system, and the other end is connected to the planet carrier P of the planetary gear mechanism 8. Therefore, the second brake 3 can lock the planet carrier P of the planetary gear mechanism 8, and when the second brake 3 is closed, the planet carrier P is locked.

[0028] The ring gear R of the planetary gear mechanism 8 is connected to the housing through the third brake 4, that is, one end of the third brake 4 is connected to the housing of the automobile hybrid system, and the other end is connected to the ring gear R of the planetary gear mechanism 8. Therefore, the third brake 4 can lock the ring gear R of the planetary gear mechanism 8, and when the third brake 4 is closed, the ring gear R is locked.

[0029] The first clutch 5 is connected to the planetary gear mechanism 8. Specifically, the connection mode of the first clutch 5 can be that the ring gear R of the planetary gear mechanism 8 is connected to the planet carrier P of the planetary gear mechanism 8 through the first clutch 5, or the ring gear R of the planetary gear mechanism 8 is connected to the sun gear S of the planetary gear mechanism 8 through the first clutch 5, or the sun gear S of the planetary gear mechanism 8 is connected to the planet carrier P of the planetary gear mechanism 8 through the first clutch 5. Thus, the first clutch 5 can lock two of the ring gear R, the planet carrier P or the sun gear S of the planetary gear mechanism 8, so as to realize the same speed operation of the ring gear R, the planet carrier P or the sun gear S. In this embodiment, one end of the first clutch 5 is connected to the ring gear R, and the other end is connected to the planet carrier P. When the first clutch 5 is closed, the planet carrier P, the ring gear R, and the sun gear S run at the same speed.

[0030] The ring gear R of the planetary gear mechanism 8 is connected to the output gear mechanism through the second clutch 6. The output gear mechanism can be used as the output end of the automobile hybrid power system. The output gear mechanism can include a first gear 91, a second gear 92 and a third gear 93. The ring gear R of the planetary gear mechanism 8 is connected to the first gear 91 through the second clutch 6, the first gear 91 is meshed with the second gear 92, the second gear 92 is meshed with the third gear 93, and the third gear 93 is used as the output end of the automobile hybrid power system. Thus, the second clutch 6 connects the ring gear R of the planetary gear mechanism 8 to the output gear mechanism, and the power of the ring gear R of the planetary gear mechanism 8 is output through the second clutch 6, the first gear 91, the second gear 92 and the third gear 93. When the second clutch 6 is closed, the power of the ring gear R is output through the second clutch 6, the first gear 91, the second gear 92 and the third gear 93. When the second clutch 6 is disconnected, the power of the ring gear R is disconnected from the output end of the automobile hybrid power system, and the operation of the planetary gear mechanism 8 is not related to the output end.

[0031] In an optional embodiment, the output gear mechanism is connected to the differential 10 via an output bevel gear mechanism, and the output shaft 11 of the differential 10 is arranged perpendicular to the axis of the engine 1 .

[0032] The output bevel gear mechanism includes a fourth gear 94 and a fifth gear 95, the fourth gear 94 is connected to the output gear mechanism, the fourth gear 94 and the fifth gear 95 are meshed, and the fifth gear 95 is connected to the differential 10. Thus, the power of the ring gear R of the planetary gear mechanism 8 is output through the second clutch 6, the first gear 91, the second gear 92, the third gear 93, the fourth gear 94 and the fifth gear 95. Thus, the wheels can be driven.

[0033] In an optional embodiment, the output bevel gear mechanism can be integrated with the third gear 93. Thus, the overall structure is more compact and more applicable.

[0034] In an optional embodiment, the output bevel gear mechanism can be integrated with the third gear 93 and the differential.

[0035] Reference Manual Attached Figure 1 As shown, the direction of the output shaft 11 of the differential 10 can be arranged perpendicular to the axial direction of the engine 1, so that the automobile hybrid power system is more suitable for arrangement on a longitudinal vehicle platform.

[0036] Reference Manual Attached Figure 2 The output gear mechanism can be connected to the differential 10 through a transmission shaft 12, and the length of the transmission shaft 12 can be adjusted according to actual needs. At this time, the differential 10 and the automobile hybrid power system are two independent components. As a result, the automobile hybrid power system has better flexibility and is more convenient to arrange.

[0037] The transmission shaft 12 may be provided with a first universal joint 121 and a second universal joint 122 , which can further enhance the flexibility of the hybrid power system of the vehicle.

[0038] Reference Manual Attached Figure 3 The output gear mechanism is connected to the differential 10, and the direction of the output shaft 11 of the differential 10 can be arranged in parallel with the axial direction of the engine 1. Thus, the automobile hybrid power system is more suitable for being arranged on a transverse vehicle platform.

[0039] In an optional embodiment, the planetary gear mechanism 8 is arranged on the side of the motor 7 away from the engine 1. The axes of the first gear 91, the second gear 92 and the third gear 93 are all arranged parallel to the motor shaft of the motor 7 and the axis of the planetary gear mechanism 8.

[0040] The automotive hybrid power system provided by the embodiment of the present invention can realize the following driving modes:

[0041] In pure electric drive mode, that is, the engine 1 is not working, the second brake 3 is closed, the second clutch 6 is closed, and the motor 7 realizes power output through the planetary gear mechanism 8 and the output gear mechanism, and then drives the wheels. The pure electric drive mode can cover the pure electric drive requirements within the full speed range of the vehicle and the pure electric function requirements of the vehicle moving forward and backward.

[0042] In the extended-range power generation mode, the engine 1 and the motor 7 work at the same time, and the motor 7 works in the power generation mode. The third brake 4 is closed to lock the ring gear R of the planetary gear mechanism 8, that is, the output end of the planetary gear mechanism 8 is fixed, the second clutch 6 is opened, and a fixed speed ratio is formed between the engine 1 and the motor 7, and power is not transmitted to the output end of the vehicle hybrid system.

[0043] In the hybrid mode, the engine 1 and the motor 7 work at the same time, and the output power of the engine 1 is output through the output gear mechanism. In the hybrid mode, by controlling the first brake 2, the first clutch 5 and the second clutch 6, the following working modes can be realized:

[0044] When the first brake 2 and the first clutch 5 are opened and the second clutch 6 is closed, the motor 7 can perform stepless dynamic speed regulation for the engine 1. The power of the engine 1 passes through the ring gear R of the planetary gear mechanism 8 and is then output through the output gear mechanism, thus realizing a power split mode.

[0045] When the first brake 2 is opened and the first clutch 5 and the second clutch 6 are closed, the planetary gear mechanism 8 is locked, and the engine 1 and the motor 7 maintain the same speed, so the engine 1 and the motor 7 will run at the same speed, the engine 1 is driven, and the motor 7 can enter the power generation mode or the power-assisted driving mode. The speed of the engine 1 is used for power output through the output gear mechanism, that is, the first locked direct drive gear. When the motor 7 is in the power-assisted driving mode, the output torque of the automobile hybrid system is the sum of the torques of the engine 1 and the motor 7. The output capacity of the automobile hybrid system is greater than that of other working modes. At this time, the automobile hybrid system is in the maximum capacity state and has better power performance;

[0046] When the first brake 2 is closed, the first clutch 5 is open and the second clutch 6 is closed, the motor shaft of the motor 7 is locked. At this time, the motor 7 has zero speed, the engine 1 is driven alone, the engine 1 to the ring gear R is a fixed speed ratio, the planetary gear mechanism 8 is in a speed-increasing state, and power is output through the planetary gear mechanism 8 and the output gear mechanism, that is, the second locked direct drive gear. At this time, there is no loss of the motor 7, making the automobile hybrid power system more efficient.

[0047] The automobile hybrid power system provided by the present invention has the following beneficial effects:

[0048] The automobile hybrid power system provided by the present invention connects the engine and the motor through a planetary gear mechanism, and outputs power through an output gear mechanism at the same time, and can realize three driving modes of pure electric driving mode, extended-range power generation mode and hybrid mode, and realize stepless speed regulation while outputting torque; the three driving modes can be freely switched within the entire vehicle speed range, so that the automobile hybrid power system has greater flexibility and higher functional coverage; through the cooperation of the first brake, the second brake, the third brake, the first clutch and the second clutch, a pure electric driving mode, a range-extended mode, a power split mode and two direct drive modes with different speed ratios can be realized, so that the whole vehicle has better power performance while reducing losses and improving the efficiency of the automobile hybrid power system; only one motor is used while realizing multiple driving modes, so as to reduce costs and improve the economic applicability of the automobile hybrid power system.

[0049] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0050] Unless otherwise specifically stated, the relative arrangement of the components and steps, numerical expressions and numerical values ​​described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship, and the techniques, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but in appropriate cases, the techniques, methods and devices should be regarded as part of the authorization specification.

[0051] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0052] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A hybrid vehicle system, characterized in that: include: An engine (1), a first brake (2), a second brake (3), a third brake (4), a first clutch (5), a second clutch (6), a motor (7), a planetary gear mechanism (8) and an output gear mechanism, The output shaft of the engine (1) is connected to the planet carrier of the planetary gear mechanism (8), and the planet carrier of the planetary gear mechanism (8) is connected to the housing via a second brake (3). The sun gear of the planetary gear mechanism (8) is connected to the motor shaft of the motor (7), and the sun gear of the planetary gear mechanism (8) is connected to the housing via a first brake (2). The ring gear of the planetary gear mechanism (8) is connected to the housing via the third brake (4). The first clutch (5) is connected to the planetary gear mechanism (8); when the first clutch (5) is closed, the planet carrier, the ring gear and the sun gear of the planetary gear mechanism (8) can run at the same speed. The ring gear of the planetary gear mechanism (8) is connected to the output gear mechanism via a second clutch (6).

2. The automotive hybrid power system according to claim 1, characterized in that: A shock absorber (9) is arranged on the output shaft of the engine (1).

3. The automotive hybrid power system according to claim 1, characterized in that: The ring gear of the planetary gear mechanism (8) is connected to the planet carrier of the planetary gear mechanism (8) through the first clutch (5), or the ring gear of the planetary gear mechanism (8) is connected to the sun gear of the planetary gear mechanism (8) through the first clutch (5), or the sun gear of the planetary gear mechanism (8) is connected to the planet carrier of the planetary gear mechanism (8) through the first clutch (5).

4. The automotive hybrid power system according to claim 1, characterized in that: The output gear mechanism comprises a first gear (91), a second gear (92) and a third gear (93); the ring gear of the planetary gear mechanism (8) is connected to the first gear (91) via the second clutch (6); the first gear (91) is meshed with the second gear (92); the second gear (92) is meshed with the third gear (93); and the third gear (93) serves as an output end of a hybrid power system of an automobile.

5. The automotive hybrid power system according to claim 1, characterized in that: The output gear mechanism is connected to the differential (10) via an output bevel gear mechanism, and the output shaft (11) of the differential (10) is arranged perpendicular to the axis of the engine (1).

6. The automotive hybrid power system according to claim 5, characterized in that: The output bevel gear mechanism comprises a fourth gear (94) and a fifth gear (95), the fourth gear (94) is connected to the output gear mechanism, the fourth gear (94) and the fifth gear (95) are meshed, and the fifth gear (95) is connected to the differential (10).

7. The automotive hybrid power system according to claim 1, characterized in that: The output gear mechanism is connected to the differential (10) via a transmission shaft (12).

8. The automotive hybrid power system according to claim 7, characterized in that: The transmission shaft (12) is provided with a first universal wheel (121) and a second universal wheel (122).

9. The automotive hybrid power system according to claim 1, characterized in that: The output gear mechanism is connected to a differential (10), and an output shaft (11) of the differential (10) is arranged parallel to an axis of the engine (1).

10. The automotive hybrid power system according to claim 1, characterized in that: The planetary gear mechanism (8) is arranged on a side of the motor (7) away from the engine (1).

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