阅读说明：本技术 一种混合动力驱动装置 (Hybrid power driving device ) 是由 陈史俊 林霄喆 谭艳军 杨帆 孙艳 方少权 王瑞平 安聪慧 肖逸阁 于 2020-12-04 设计创作，主要内容包括：本发明公开了一种混合动力驱动装置,用于混合动力汽车,包括发动机、与所述发动机的输出端相连的输入轴、输出轴、与所述输入轴连接的P1电机、与所述输出轴连接的P3电机和位于所述输入轴、所述输出轴之间用以控制所述输入轴与所述输出轴连接与分离的狗牙离合器。本发明公开的混合动力驱动装置通过用狗牙离合器代替传统离合器,结实耐用,可以保证在电机快速响应地调速下完成较平顺换挡,同时提升系统的可靠性并明显降低成本。又通过将P1电机偏轴布置,可以有效减小整车轴向尺寸,从而可以覆盖A/B平台车辆搭载布置要求。通过将P3电机轴套轴的布置在P1电机的外侧,结构简单,工艺可实现能力强,高度集成,整体装置布置紧凑。(The invention discloses a hybrid power driving device, which is used for a hybrid electric vehicle and comprises an engine, an input shaft connected with the output end of the engine, an output shaft, a P1 motor connected with the input shaft, a P3 motor connected with the output shaft and a dog clutch positioned between the input shaft and the output shaft and used for controlling the connection and the separation of the input shaft and the output shaft. The hybrid power driving device disclosed by the invention replaces the traditional clutch with the dog clutch, is firm and durable, can ensure that smooth gear shifting can be finished under the condition that the motor rapidly responds to speed regulation, and simultaneously improves the reliability of the system and obviously reduces the cost. And the P1 motor is arranged in an off-axis way, so that the axial size of the whole vehicle can be effectively reduced, and the carrying arrangement requirement of the A/B platform vehicle can be met. Through arranging the outer side at P1 motor with the arrangement of P3 motor shaft sleeve axle, simple structure, technology realizability is strong, high integration, and the whole device arranges compactly.)

1. A hybrid power driving device is used for a hybrid electric vehicle and is characterized by comprising an engine, an input shaft connected with the output end of the engine, an output shaft, a P1 motor connected with the input shaft, a P3 motor connected with the output shaft and a dog clutch positioned between the input shaft and the output shaft and used for controlling the connection and the disconnection of the input shaft and the output shaft.

2. The hybrid drive of claim 1, wherein the input shaft is provided at a front end thereof with a first gear, and the P1 motor is provided at a front end thereof with a second gear engaged with the first gear.

3. The hybrid drive apparatus according to claim 2, wherein the second gear is an involute helical gear for changing a speed ratio of the engine to the P1 motor, and an axis of the second gear does not coincide with an axis of the first gear.

4. A hybrid drive as set forth in claim 2 wherein said input shaft is provided at a rear end thereof with a third gear connected to said output shaft, said dog clutch mating with said third gear.

5. The hybrid drive of claim 4, wherein a fourth gear connected to the third gear and the P3 motor is provided at a front end of the output shaft.

6. The hybrid drive of claim 5, wherein the third gear is coupled to the fourth gear via a reduction gear pair.

7. The hybrid driving apparatus as claimed in claim 5, wherein a fifth gear engaged with the fourth gear is provided at a front end of the P3 motor.

8. The hybrid drive of claim 7, wherein said P3 motor and said fifth gear are both sleeved outside said P1 motor and are free to rotate relative to said P1 motor.

9. The hybrid drive apparatus according to claim 1, further comprising a sixth gear connected to a wheel of the hybrid vehicle, wherein a seventh gear meshed with the sixth gear is provided at a rear end of the output shaft.

10. A hybrid drive as claimed in claim 9, characterized in that a differential is provided between the sixth gear and the wheel for controlling the difference in rotational speed of the wheel.

Technical Field

The invention relates to the technical field of vehicle transmission, in particular to a hybrid power driving device.

Background

With the development of new energy automobiles, hybrid automobiles are now formed into new energy automobile models which are mainly sold at present, the hybrid automobiles can operate in various driving modes, however, the battery capacity is limited, and the hybrid automobiles mainly rely on engine combustion to provide power.

The hybrid vehicle types can be divided into P0, P1, P2, P3, P4 and the like according to the position of the motor. P0 motor is placed in front of the gear box, Belt drives BSG motor (Bel drive Starter Generator, start, generate electricity integral motor). P1 the motor is placed before the gearbox, mounted on the engine crankshaft, before the clutch (original flywheel position). P2: the electric machine is placed at the input of the gearbox, after the clutch (between the engine and the gearbox). P3: the motor is arranged at the output end of the gearbox, shares the same shaft with the engine and is output in the same source. P4: the motor is arranged behind the gearbox, is separated from the output shaft of the engine and is used for driving unpowered wheels (the P4 is that the motor is arranged on a rear axle, and the wheel side drive is also called P4).

The defects of four single-motor driving modes are obvious, and more vehicle models adopt double motors to achieve the purpose of enabling the engine to work in a high-efficiency range forever, such as an IMMD system in Honda. However, the existing double-motor hybrid electric vehicle is high in research, development and manufacturing cost, and when a traditional clutch is used, drag torque loss exists in the process that the clutch is opened during mode switching, so that the efficiency of the transmission is influenced. And the traditional clutch adopts the design of many friction discs, and spare part cost is higher relatively, and can wear constantly after using, has higher requirement to durability and adaptive adjustment.

The foregoing description is provided for general background information and is not admitted to be prior art.

Disclosure of Invention

The invention aims to provide a hybrid power driving device which replaces a traditional clutch with a dog clutch.

The invention provides a hybrid power driving device, which is used for a hybrid electric vehicle and comprises an engine, an input shaft connected with the output end of the engine, an output shaft, a P1 motor connected with the input shaft, a P3 motor connected with the output shaft and a dog clutch positioned between the input shaft and the output shaft and used for controlling the connection and the disconnection of the input shaft and the output shaft.

Further, a first gear is arranged at the front end of the input shaft, and a second gear meshed with the first gear is arranged at the front end of the P1 motor.

Further, the second gear is an involute helical gear for changing the speed ratio of the engine and the P1 motor, and the axis of the second gear is not coincident with the axis of the first gear.

Furthermore, a third gear connected with the output shaft is arranged at the rear end of the input shaft, and the dog clutch is matched with the third gear.

Furthermore, a fourth gear connected with the third gear and the P3 motor is arranged at the front end of the output shaft.

Further, the third gear and the fourth gear are connected through a reduction gear pair.

Further, a fifth gear meshed with the fourth gear is arranged at the front end of the P3 motor.

Further, the P3 motor and the fifth gear are sleeved outside the P1 motor and can rotate freely relative to the P1 motor.

Furthermore, the hybrid electric vehicle further comprises a sixth gear connected with wheels of the hybrid electric vehicle, and a seventh gear meshed with the sixth gear is arranged at the rear end of the output shaft.

Further, a differential mechanism used for controlling the rotation speed difference of the wheels is arranged between the sixth gear and the wheels.

The hybrid power driving device provided by the invention replaces the traditional clutch with the dog clutch, is firm and durable, can ensure that smooth gear shifting can be completed under the condition that the motor rapidly responds to speed regulation, and simultaneously improves the reliability of the system and obviously reduces the cost. And the P1 motor is arranged in an off-axis way, so that the axial size of the whole vehicle can be effectively reduced, and the carrying arrangement requirement of the A/B platform vehicle can be met. Through arranging the outer side at P1 motor with the arrangement of P3 motor shaft sleeve axle, simple structure, technology realizability is strong, high integration, and the whole device arranges compactly.

Drawings

FIG. 1 is a schematic structural diagram of a hybrid drive unit according to an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating the operation of the hybrid drive apparatus according to the embodiment of the present invention in each operation mode.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Referring to fig. 1 to fig. 2, the present embodiment provides a hybrid driving apparatus for a hybrid vehicle. The hybrid drive device includes a battery pack (not shown) for storing electric Power and driving the vehicle by the electric Power, a PCU (Power Control Unit) (not shown), an engine 10 (internal combustion engine), an input shaft 20, an output shaft 30, a P1 motor 40, a P3 motor 50, a dog clutch 60, a differential 70, and a first gear 81, a second gear 82, a third gear 83, a fourth gear 84, a fifth gear 85, a sixth gear 86, and a seventh gear 87. The P1 motor 40 and the P3 motor 50 are both high-voltage high-power motors, and can be used as generators or motors.

The input shaft 20 is connected to an output end of the engine 10, and the first gear 81 is disposed at a front end of the input shaft 20 and the third gear 83 is disposed at a rear end of the input shaft 20. The second gear 82 is disposed at the front end of the P1 motor 40 and meshes with the first gear 81. The second gear 82 is an involute helical gear for setting the speed ratio between the engine 10 and the P1 motor 40. The second gear 82 is not coincident with the axis of the first gear 81, so that the P1 motor 40 is arranged in an off-axis manner relative to the engine 10, and the axial size of the whole vehicle is effectively reduced.

The dog clutch 60 is matched with the third gear 83 to control the combination and separation of the third gear 83 and the output shaft 30, and a hydraulic mechanism or a motor mechanism is arranged on the dog clutch 60 to control the state of the clutch. Dog clutch 60 is more durable for conventional clutch, can guarantee to accomplish more level and smooth shifting under the quick response ground speed governing of motor, promotes the reliability of system and obviously reduce cost simultaneously.

A fourth gear 84 is disposed at the front end of the output shaft 30, a seventh gear 87 is disposed at the rear end of the output shaft 30, and a fifth gear 85 is disposed at the front end of the P3 motor 50 and meshes with the fourth gear 84. The third gear 83 and the fourth gear 84 are connected by at least one pair of reduction gear pairs (not shown), and the number of the reduction gear pairs can be set according to actual needs. The sixth gear 86 is connected to the wheels 90 of the vehicle, the sixth gear 86 meshes with the seventh gear 87, and the differential 70 is arranged between the sixth gear 86 and the wheels 90 to control the difference in the rotational speed of the wheels 90.

The P3 motor 50 and the fifth gear 85 are both sleeved outside the P1 motor 40 in the form of a shaft sleeve shaft and can freely rotate relative to the P1 motor 40. The shaft sleeve shaft of the P3 motor 50 is arranged outside the P1 motor 40, so that the structure is simple, the process realizability is high, the integration is high, and the whole device is compact in arrangement.

The P1 motor 40 and the P3 motor 50 are both connected with the battery pack through wires, when the P1 motor 40 and the P3 motor 50 are used as generators, the battery pack stores electric energy generated by the P1 motor 40 and the P3 motor 50, and when the P1 motor 40 and the P3 motor 50 are used as motors, the electric energy in the battery pack drives the P1 motor 40 and the P3 motor 50 to rotate.

The PCU is connected with the engine 10, the P1 motor 40, the P3 motor 50 and the dog clutch 60, and controls the State of the dog clutch 60 and the start, stop and rotation speed of the engine 10, the P1 motor 40 and the P3 motor 50 according to the conditions of vehicle speed, accelerator brake operation, battery pack SOC (State of charge) and the like, and is specifically subdivided into 6 operating modes, namely an idle charging mode, an electric-only driving mode, a series driving mode, a parallel driving mode, an engine direct driving mode and a braking energy recovery mode.

Referring to fig. 2, in the idle charge mode, the PCU controls the dog clutch 60 to be disengaged, the P3 motor 50 is not started, and the engine 10 drives the P1 motor 40 to charge the battery pack. Under pure electric drive mode, PCU control dog tooth clutch 60 does not combine, and P1 motor 40 does not start, and the battery package is the power supply of P3 motor, and drive output shaft 30 rotates, and then drive wheel 90 and rotate. In the series driving mode, the PCU controls the dog clutch 60 not to be engaged, the engine 10 drives the P1 motor 40 to charge the battery pack, and the battery pack supplies power to the P3 motor to drive the output shaft 30 to rotate, so as to drive the wheels 90 to rotate. In the braking energy recovery mode, the PCU controls the dog clutch 60 to be not engaged, the accelerator is released when the automobile runs, the P3 motor 50 sends a negative torque command, the P3 motor 50 serves as a generator, and the P3 motor 50 can be understood as a brake capable of charging the battery pack.

In the parallel drive mode, the PCU controls the dog clutch 60 to engage, the third gear 83 meshes with the fourth gear 84, the input shaft 20 is connected to the output shaft 30, the engine 10 drives the wheels 90 to rotate via the input shaft 20, the dog clutch 60, and the output shaft 30, and the P3 motor 50 also drives the output shaft 30 to rotate. When the battery pack is low, the engine 10 may also rotate the P1 motor 40 to charge the battery pack. In the engine direct drive mode, the PCU controls the dog clutch 60 to be engaged, the third gear 83 is engaged with the fourth gear 84, the input shaft 20 is connected with the output shaft 30, and the engine 10 drives the wheels 90 to rotate through the input shaft 20, the dog clutch 60 and the output shaft 30. When the battery pack is low, the engine 10 may also rotate the P1 motor 40 to charge the battery pack.

In the process of starting and accelerating the vehicle, the vehicle firstly responds quickly through a pure electric driving mode, is in a series connection mode at low speed and then is in a parallel connection driving mode, and the high-speed cruising stage is an engine direct driving mode. The mode switching sequence is only the optimal switching sequence in the ideal speed increasing process, and then the mode switching sequence is changed according to the speed increase and decrease in the actual driving process.

The hybrid power driving device provided by the embodiment replaces the traditional clutch with the dog tooth clutch 60, is firm and durable, can ensure that the smooth gear shifting can be completed under the speed regulation of the motor with quick response, and simultaneously improves the reliability of the system and obviously reduces the cost. And the P1 motor 40 is arranged in an off-axis way, so that the axial size of the whole vehicle can be effectively reduced, and the requirement of carrying and arranging the A/B platform vehicle can be met. The shaft sleeve shaft of the P3 motor 60 is arranged outside the P1 motor 40, so that the structure is simple, the process realizability is high, the integration is high, and the whole device is compact in arrangement.

In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. It will be understood that when an element such as a layer, region or substrate is referred to as being "formed on," "disposed on" or "located on" another element, it can be directly on the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly formed on" or "directly disposed on" another element, there are no intervening elements present.

In this document, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms can be understood in a specific case to those of ordinary skill in the art.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the purpose of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.

As used herein, the ordinal adjectives "first", "second", etc., used to describe an element are merely to distinguish between similar elements and do not imply that the elements so described must be in a given sequence, either temporally, spatially, in ranking, or in any other manner.

As used herein, the meaning of "a plurality" or "a plurality" is two or more unless otherwise specified.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.