Hybrid system and vehicle having the same

Abstract

The present invention discloses a hybrid power system and a vehicle having the same, comprising: an engine; a first planetary gear, the first planetary gear comprises a first sun gear, a first planetary carrier and a first gear ring; a first clutch, the first clutch is connected to the engine and the first planetary carrier respectively; a second clutch, the second clutch is connected to the engine and the first sun gear respectively; a second planetary gear, the second planetary gear is connected to the first planetary gear, the second planetary gear comprises a second sun gear and is connected to a first driving gear; a first brake, the first brake is connected to the second sun gear; a first motor, the first motor is connected to the first planetary gear; a second motor, the second motor is connected to the second driving gear; a driven gear, the driven gear and the first driving gear are meshed with the second driving gear. The hybrid power system of the embodiment of the present invention has the advantages of multiple modes, simple structure and high applicability.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a hybrid power system and a vehicle having the same. Background Art

[0002] The hybrid power system in the related technology is usually equipped with a clutch, a brake, a dual planetary gear, a dual motor and an engine, so that the hybrid power system can be driven by the engine alone, the motor alone, and the engine and the motor together. However, due to the unreasonable arrangement within the hybrid power system, the diversity of the modes of the hybrid power system is low and the applicable scenarios are few. In addition, some hybrid power systems need to be equipped with a large number of clutches and brakes to increase the diversity of the modes of the hybrid power system, but this will make the structure of the hybrid power system complicated and not conducive to layout. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a hybrid power system, which has the advantages of multiple modes, simple structure and high applicability.

[0004] The present invention also provides a vehicle having the hybrid power system.

[0005] In order to achieve the above-mentioned object, a hybrid power system is provided according to a first aspect of the present invention, comprising: an engine, the engine having an engine output shaft; a first planetary gear, the first planetary gear comprising a first sun gear, a first planetary carrier and a first ring gear connected in a transmission manner; a first clutch, the first clutch being connected to the engine output shaft and the first planetary carrier respectively, for controlling whether power is transmitted between the engine output shaft and the first planetary carrier; a second clutch, the second clutch being connected to the engine output shaft and the first sun gear respectively, for controlling whether power is transmitted between the engine output shaft and the first sun gear; a second planetary gear, the second planetary gear being connected to the first ring gear and the first planetary carrier respectively, the second planetary gear comprising a second sun gear, the second planetary gear being connected to a first driving gear; a first brake, the first brake being connected to the second sun gear, for controlling whether braking is applied to the second sun gear; a first motor, the first motor being connected to the first planetary gear in a transmission manner; a second motor, the second motor being connected to a second driving gear; and a driven gear, the driven gear being meshed with the first driving gear and the second driving gear respectively.

[0006] The hybrid power system according to the embodiment of the present invention has the advantages of multiple modes, simple structure and high applicability.

[0007] According to some embodiments of the present invention, the second planetary row includes: a second sun gear; a second ring gear, which is arranged around the second sun gear and is drivingly connected to the first planet carrier; a second planet carrier, which is drivingly connected to the first ring gear and the first driving gear respectively; a plurality of second planetary gears, each of which is rotatably mounted on the second planet carrier and is respectively meshed with the second sun gear and the second ring gear, and a plurality of second planetary gears are arranged at intervals along the circumference of the second sun gear; the first planetary row also includes a plurality of first planetary gears, which is drivingly connected to the first motor, the first ring gear is arranged around the first sun gear, each of which is rotatably mounted on the first planet carrier and is respectively meshed with the first sun gear and the first ring gear, and a plurality of first planetary gears are arranged at intervals along the circumference of the first sun gear.

[0008] According to some embodiments of the present invention, the first clutch includes a first active end and a first driven end that can be engaged with and separated from each other, the first active end is drivingly connected to the engine output shaft, and the first driven end is drivingly connected to the first planetary carrier; the second clutch includes a second active end and a second driven end that can be engaged with and separated from each other, the second active end is drivingly connected to the engine output shaft, and the second driven end is drivingly connected to the first sun gear; the first active end and the second active end are formed as one body; the first driven end and the second driven end are arranged along the axial direction of the engine output shaft.

[0009] According to some embodiments of the present invention, the first driven end and the first planet carrier are connected as a whole through a first structural member; the second driven end and the first sun gear are connected as a whole through a second structural member.

[0010] According to some embodiments of the present invention, the first structural member is connected to a side of the first planet carrier facing the engine; and the second structural member is connected to a side of the first sun gear facing the engine.

[0011] According to some embodiments of the present invention, the first structural member is hollowly mounted on the second structural member, and the second sun gear is hollowly mounted on the first structural member and the second structural member; or, the first structural member is hollowly mounted on the second structural member, and the second sun gear is hollowly mounted on the second structural member.

[0012] According to some embodiments of the present invention, the first ring gear and the second planet carrier are connected as a whole through a third structural member; the first planet carrier and the second ring gear are connected as a whole through a fourth structural member; the third structural member is located between the first planetary row and the second planetary row; the fourth structural member surrounds the outside of the third structural member.

[0013] According to some embodiments of the present invention, the hybrid power system further comprises: a second brake connected to the fourth structural member and configured to control whether braking is applied to the fourth structural member.

[0014] According to some embodiments of the present invention, the driven gear is a front-drive driven gear, and the first driving gear and the second driving gear are both engaged with the front-drive driven gear; or the driven gear includes a front-drive driven gear and a rear-drive driven gear, the first driving gear is engaged with the front-drive driven gear, and the second driving gear is engaged with the rear-drive driven gear.

[0015] According to some embodiments of the present invention, the first planetary gear and the second planetary gear are arranged between the engine and the first motor, and the engine and the first motor are arranged coaxially; the second motor and the first motor are arranged off-axis, and the second motor and the first motor are located on the same side of the first planetary gear and the second planetary gear.

[0016] According to a second aspect of the present invention, a vehicle is provided, comprising: a hybrid power system according to the first aspect of the present invention.

[0017] The vehicle according to the second embodiment of the present invention has the advantages of multiple modes, simple structure and high applicability by utilizing the hybrid power system according to the first embodiment of the present invention.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a schematic structural diagram of a hybrid power system according to an embodiment of the present invention.

[0021] Figure 2 is a schematic structural diagram of a hybrid power system according to another embodiment of the present invention.

[0022] Figure 3 1 is an equivalent lever diagram of the first gear in the fuel mode of the hybrid power system according to an embodiment of the present invention.

[0023] Figure 4 1 is an equivalent lever diagram of the second gear in the fuel mode of the hybrid power system according to an embodiment of the present invention.

[0024] Figure 51 is an equivalent lever diagram of the third gear in the fuel mode of the hybrid power system according to an embodiment of the present invention.

[0025] Figure 6 4 is an equivalent lever diagram of the second gear in the pure electric mode of the hybrid system according to an embodiment of the present invention.

[0026] Figure 7 1 is an equivalent lever diagram of a hybrid continuously variable transmission mode of a hybrid power system according to an embodiment of the present invention.

[0027] Figure 8 is a schematic structural diagram of a hybrid power system according to another embodiment of the present invention.

[0028] Fig. 9 is a partial structural schematic diagram of a hybrid power system according to another embodiment of the present invention.

[0029] Reference numerals:

[0030] Hybrid system1.

[0031] engine 100, engine output shaft 110,

[0032] The first planetary gear 200, the first sun gear 210, the first planetary carrier 220, the first ring gear 230, the third structural member 231, the first planetary gear 240,

[0033] The first clutch 300, the first driving end 310, the first driven end 320, the first structural member 330,

[0034] The second clutch 400, the second driving end 410, the second driven end 420, the second structural member 430,

[0035] The second planetary gear 500, the first driving gear 501, the second sun gear 510, the second planetary carrier 520, the second ring gear 530, the fourth structural member 531, the second planetary gear 540, the first brake 550, the second brake 560,

[0036] The first motor 600, the second motor 700, the second driving gear 710, the driven gear 800, the front driven gear 810, the rear driven gear 820,

[0037] Front differential 900 , front reduction driving gear 910 , front reduction driven gear 920 , rear reduction driving gear 930 , rear reduction driven gear 940 , central controller 950 , first inverter 960 , second inverter 970 , battery 980 , rear differential 990 . DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0039] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] In the description of the present invention, "plurality" means two or more.

[0041] Hereinafter, a hybrid system 1 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0042] like Figure 1 and Figure 2 As shown, the hybrid system 1 includes an engine 100 , a first planetary gear 200 , a first clutch 300 , a second clutch 400 , a second planetary gear 500 , a first brake 550 , a first motor 600 , a second motor 700 , and a driven gear 800 .

[0043] The engine 100 has an engine output shaft 110, a first planetary row 200 includes a first sun gear 210, a first planetary carrier 220 and a first ring gear 230 which are connected in a transmission manner, a first clutch 300 is connected to the engine output shaft 110 and the first planetary carrier 220 respectively, and is used to control whether power is transmitted between the engine output shaft 110 and the first planetary carrier 220. The second clutch 400 is connected to the engine output shaft 110 and the first sun gear 210 respectively, and is used to control whether power is transmitted between the engine output shaft 110 and the first sun gear 210. The second planetary row 500 is connected in a transmission manner to the first ring gear 230 and the first planetary carrier 220 respectively, the second planetary row 500 includes a second sun gear 510, the second planetary row 500 is connected to a first driving gear 501, and the first motor 600 is connected in a transmission manner to the first planetary row 200. The first brake 550 is connected to the second sun gear 510, and is used to control whether braking is applied to the second sun gear 510. The second motor 700 is connected to the second driving gear 710 , and the driven gear 800 is meshed with the first driving gear 501 and the second driving gear 710 , respectively.

[0044] According to the hybrid system 1 of the embodiment of the present invention, the first clutch 300 is connected to the engine output shaft 110 and the first planetary carrier 220 respectively to control whether power is transmitted between the engine output shaft 110 and the first planetary carrier 220, and the second clutch 400 is connected to the engine output shaft 110 and the first sun gear 210 respectively to control whether power is transmitted between the engine output shaft 110 and the first sun gear 210. The second planetary row 500 is respectively connected to the first ring gear 230 and the first planetary carrier 220 in a transmission manner, and the second planetary row 500 includes a second sun gear 510, and the second planetary row 500 is connected to the first driving gear 501. The first brake 550 is connected to the second sun gear 510 to control whether to apply a brake to the second sun gear 510. The driven gear 800 is meshed with the first driving gear 501.

[0045] The engine 100 alone drives the vehicle to move in at least the following three modes:

[0046] Direct drive mode 1: the second clutch 400 allows power to be transmitted between the engine output shaft 110 and the first sun gear 210, the first clutch 300 blocks power transmission between the engine output shaft 110 and the first planetary carrier 220, and the first brake 550 brakes the second sun gear 510, the engine 100 drives the first sun gear 210 to rotate, and then transmits power to the second planetary carrier 520 through the first gear ring 230 and the first planetary carrier 220, the first driving gear 501 rotates with the second planetary carrier 520 to drive the driven gear 800 to rotate, at this time, the ratio of the rotation speed of the engine 100 to the rotation speed of the driven gear 800 is a first fixed value, and the hybrid power system 1 is in the first gear of the fuel mode;

[0047] Direct drive mode 2: the first clutch 300 allows power to be transmitted between the engine output shaft 110 and the first planetary carrier 220, the second clutch 400 blocks power transmission between the engine output shaft 110 and the first sun gear 210, and the first brake 550 brakes the second sun gear 510, the engine 100 drives the first planetary carrier 220 to rotate, and then transmits power to the second planetary carrier 520 through the first ring gear 230 and the first planetary carrier 220, the first driving gear 501 rotates with the second planetary carrier 520 to drive the driven gear 800 to rotate, at this time, the ratio of the rotation speed of the engine 100 to the rotation speed of the driven gear 800 is a second fixed value, and the hybrid power system 1 is in the fuel mode second gear;

[0048] Direct drive mode three: the first clutch 300 allows power to be transmitted between the engine output shaft 110 and the first planetary carrier 220, the second clutch 400 allows power to be transmitted between the engine output shaft 110 and the first sun gear 210, and the first brake 550 allows the second sun gear 510 to rotate, the engine 100 drives the first sun gear 210 and the first planetary carrier 220 to rotate, and then transmits power to the second planetary carrier 520 through the first ring gear 230 and the first planetary carrier 220, the first driving gear 501 rotates with the second planetary carrier 520 to drive the driven gear 800 to rotate, at this time, the ratio of the rotation speed of the engine 100 to the rotation speed of the driven gear 800 is a third fixed value, and the hybrid power system 1 is in the third gear of the fuel mode.

[0049] Among them, the first fixed value, the second fixed value and the third fixed value are not equal. There are three different ratios between the speed of the engine 100 and the vehicle. The large speed ratio gear can meet the power demand of the vehicle at low speed and high torque, and the small speed ratio gear can achieve high-speed driving, which greatly improves the system efficiency. The coordination of the three gears can improve the smoothness of the system and improve the driving experience. In this case, through the connection relationship between the dual clutch and the first planetary gear 200, the connection relationship between the first planetary gear 200 and the second planetary gear 500, and the connection relationship between the first sun gear 210 and the first brake 550, the engine 100 has at least three driving modes and at least three gears when it is directly driven. Therefore, this embodiment can control the vehicle to enter different modes and gears according to different needs to improve engine performance and user experience.

[0050] In addition, the first motor 600 is transmission-connected to the first planetary gear 200 , the second motor 700 is connected to the second driving gear 710 , and the driven gear 800 is connected to the second driving gear 710 .

[0051] There are at least two modes in which the motor drives the vehicle to move:

[0052] Pure electric driving mode 1: the first motor 600 and the engine 100 are not working, the second motor 700 drives the driven gear 800 to rotate through the second driving gear 710, and the hybrid system 1 is in the first gear of the pure electric mode;

[0053] Pure electric drive mode two: the engine 100 is not working, the first brake 550 brakes the second sun gear 510, the first motor 600 drives the first planetary row 200 to rotate, and then transmits power to the second planetary carrier 520 through the first ring gear 230 and the first planetary carrier 220, the first driving gear 501 rotates with the second planetary carrier 520 to drive the driven gear 800 to rotate, and the second motor 700 drives the driven gear 800 to rotate through the second driving gear 710, that is, the first motor 600 and the second motor 700 jointly drive the driven gear 800 to rotate, and the hybrid power system 1 is in the second gear of the pure electric mode.

[0054] This embodiment drives the first motor 600 and the second motor 700 synchronously to meet the high power demand of the transmission vehicle. Therefore, compared with the prior art, it not only reduces the power demand of the second motor 700, but also reduces the cost and volume of the second motor 700, thereby reducing the volume and weight of the entire hybrid system 1, thereby reducing the accommodation space for placing the hybrid system 1, and providing more possibilities for the hybrid system 1 to be applied to vehicles below Class A. In addition, the weight of the hybrid system 1 is reduced, so that the overall mass of the vehicle is reduced, thereby reducing the energy required to drive the vehicle, thereby reducing the energy consumption of the hybrid vehicle. In addition, by driving the vehicle with a motor, the energy is cleaner, which is beneficial to environmental protection, and the power cost is low.

[0055] The first motor 600, the second motor 700 and the engine 100 are all working, and the motor and the engine 100 hybrid drive the vehicle to move in at least the following five modes:

[0056] Hybrid drive mode 1: the second clutch 400 allows power to be transmitted between the engine output shaft 110 and the first sun gear 210, the first clutch 300 blocks power transmission between the engine output shaft 110 and the first planetary carrier 220, and the first brake 550 brakes the second sun gear 510. A portion of the power of the engine 100 can drive the first motor 600 to generate electricity through the double planetary gears, and another portion of the power of the engine 100 can drive the first driving gear 501 and the driven gear 800 to rotate through the double planetary gears. The second motor 700 drives the driven gear 800 to rotate through the second driving gear 710. At this time, the second motor 700 and the engine 100 jointly drive the vehicle to run, and the hybrid power system 1 is in the first gear of the hybrid drive mode;

[0057] Hybrid drive mode 2: the first clutch 300 allows power to be transmitted between the engine output shaft 110 and the first planetary carrier 220, the second clutch 400 blocks power transmission between the engine output shaft 110 and the first sun gear 210, and the first brake 550 brakes the second sun gear 510. A portion of the power of the engine 100 can drive the first motor 600 to generate electricity through the double planetary gears, and another portion of the power of the engine 100 can drive the first driving gear 501 and the driven gear 800 to rotate through the double planetary gears, or the first motor 600 drives the first driving gear 501 and the driven gear 800 to rotate through the double planetary gears, and all the power of the engine 100 drives the first driving gear 501 and the driven gear 800 to rotate through the double planetary gears. At this time, the second motor 700 can drive the driven gear 800 to rotate through the second driving gear 710, or the second motor 700 can be dragged to generate electricity, and the hybrid power system 1 is in the second gear of the hybrid drive mode;

[0058] Hybrid drive mode three: the first clutch 300 allows power to be transmitted between the engine output shaft 110 and the first planetary carrier 220, the second clutch 400 allows power to be transmitted between the engine output shaft 110 and the first sun gear 210, and the first brake 550 allows the second sun gear 510 to rotate, a part of the power of the engine 100 can drive the first motor 600 to generate electricity through the double planetary gear, and another part of the power of the engine 100 can drive the first driving gear 501 and the driven gear 800 to rotate through the double planetary gear, or the first motor 600 drives the first driving gear 501 and the driven gear 800 to rotate through the double planetary gear, and all the power of the engine 100 drives the first driving gear 501 and the driven gear 800 to rotate through the double planetary gear, at this time, the second motor 700 can drive the driven gear 800 to rotate through the second driving gear 710, or the second motor 700 can be dragged to generate electricity, and the hybrid power system 1 is in the third gear of the hybrid drive mode;

[0059] Hybrid drive continuously variable transmission (ECVT) mode: the first clutch 300 allows power to be transmitted between the engine output shaft 110 and the first planetary carrier 220, the second clutch 400 blocks power transmission between the engine output shaft 110 and the first sun gear 210, and the first brake 550 allows the second sun gear 510 to rotate, a part of the power of the engine 100 can drive the first motor 600 to generate electricity through the double planetary gear, and another part of the power of the engine 100 can drive the first driving gear 501 and the driven gear 800 to rotate through the double planetary gear, or the first motor 600 drives the first driving gear 501 and the driven gear 800 to rotate through the double planetary gear, and all the power of the engine 100 drives the first driving gear 501 and the driven gear 800 to rotate through the double planetary gear, at this time, the second motor 700 can drive the driven gear 800 to rotate through the second driving gear 710, or the second motor 700 can be dragged to generate electricity, and the hybrid power system 1 is in the hybrid drive continuously variable transmission (ECVT) mode;

[0060] Extended-range mode: the second clutch 400 allows power to be transmitted between the engine output shaft 110 and the first sun gear 210, the first clutch 300 blocks the power transmission between the engine output shaft 110 and the first planetary carrier 220, and the first brake 550 allows the second sun gear 510 to rotate. A portion of the power of the engine 100 can drive the first motor 600 to generate electricity through the double planetary gear set, and another portion of the power of the engine 100 can drive the first driving gear 501 and the driven gear 800 to rotate through the double planetary gear set. The second motor 700 drives the first driving gear 501 and the driven gear 800 to rotate through the second driving gear 710. At this time, the second motor 700 and the engine 100 jointly drive the vehicle to run, and the hybrid power system 1 is in the extended-range mode.

[0061] When the engine 100 and the motor are driven in a hybrid manner, there are three gears with fixed speed ratios, which greatly increase the range of output torque, making the system more dynamic. There is also an extended-range mode, and the system is highly economical. There is also a continuously variable transmission mode, and the vehicle speed changes quickly, and the system is more stable.

[0062] From the above description, it can be seen that by only setting up a double planetary gear, two clutches and one brake, the hybrid power system 1 can have at least three modes in which the engine 100 drives the vehicle alone, two modes in which the motors drive the vehicle alone, and five modes in which the engine 100 and the motor are combined to drive the vehicle. Therefore, the hybrid power system 1 is applicable to many occasions.

[0063] As such, the hybrid power system 1 according to the embodiment of the present invention has the advantages of multiple modes, simple structure and high applicability.

[0064] According to some specific embodiments of the present invention, Figure 1 and Figure 2 As shown, the second planetary gear set 500 includes a second ring gear 530 , a second planet carrier 520 , and a plurality of second planetary gears 540 .

[0065] The second ring gear 530 is arranged around the second sun gear 510 and is transmission connected to the first planet carrier 220. The second planet carrier 520 is transmission connected to the first ring gear 230 and the first driving gear 501 respectively. Each second planet gear 540 is rotatably mounted on the second planet carrier 520 and is meshed with the second sun gear 510 and the second ring gear 530 respectively. Multiple second planet gears 540 are arranged at intervals along the circumference of the second sun gear 510.

[0066] In this way, the power transmission between the first planetary gear 400 and the second planetary gear 500 is smoother, and the double planetary gears can share the power output by the engine 100, which can reduce the force borne by each planetary gear, which is beneficial to reduce the probability of damage to the planetary gears, and can also increase the upper limit of the output torque of the engine 100, and the hybrid system 1 has a higher driving force.

[0067] According to some specific embodiments of the present invention, Figure 1 and Figure 2 As shown, the first clutch 300 includes a first active end 310 and a first driven end 320 that can be engaged and separated from each other, the first active end 310 is drivingly connected to the engine output shaft 110, and the first driven end 320 is drivingly connected to the first planet carrier 220. The second clutch 400 includes a second active end 410 and a second driven end 420 that can be engaged and separated from each other, the second active end 410 is drivingly connected to the engine output shaft 110, and the second driven end 420 is drivingly connected to the first sun gear 210.

[0068] By combining the first active end 310 and the first driven end 320, power transmission between the engine output shaft 110 and the first planetary carrier 220 can be achieved, and by separating the first active end 310 and the first driven end 320, power transmission between the engine output shaft 110 and the first planetary carrier 220 can be stopped. By combining the second active end 410 and the second driven end 420, power transmission between the engine output shaft 110 and the first sun gear 210 can be achieved, and by separating the second active end 410 and the second driven end 420, power transmission between the engine output shaft 110 and the first sun gear 210 can be stopped.

[0069] The first active end 310 and the second active end 410 are formed as one body, that is, the first clutch 300 and the second clutch 400 are formed as one body, and the first driven end 320 and the second driven end 420 are arranged along the axial direction of the engine output shaft 110. The axial dimensions of the first clutch 300 and the second clutch 400 as a whole can be reduced, thereby reducing the axial dimensions of the hybrid power system 1 as a whole, and making the hydraulic systems of the two vehicles more centralized, thereby reducing costs.

[0070] Optionally, the first driven end 320 and the first planetary carrier 220 are connected as a whole through the first structural member 330, and the second driven end 420 and the first sun gear 210 are connected as a whole through the second structural member 430. In this way, the connection strength between the first driven end 320 and the first planetary carrier 220 is high, which can simplify the processing steps and reduce the difficulty of installation, and there is no need to provide a transmission structure such as gears between the first driven end 320 and the first planetary carrier 220, which can greatly reduce power loss. The connection strength between the second driven end 420 and the first sun gear 210 is high, which can simplify the processing steps and reduce the difficulty of installation, and there is no need to provide a transmission structure such as gears between the second driven end 420 and the first sun gear 210, which can greatly reduce power loss.

[0071] Furthermore, the first structural member 330 is connected to a side of the first planet carrier 220 facing the engine 100 , and the second structural member 430 is connected to a side of the first sun gear 210 facing the engine 100 .

[0072] In this way, the sizes of the first structural member 330 and the second structural member 430 are smaller, the transmission stability between the first driven end 320 and the first planetary carrier 220 is high, the transmission stability between the second driven end 420 and the first sun gear 210 is high, and it is beneficial to reduce the size of the hybrid power system 1. The first structural member 330 and the second structural member 430 are not easy to interfere with other structures of the hybrid power system 1.

[0073] Furthermore, the first structural member 330 is hollowly sleeved in the second structural member 430, and the second sun gear 510 is hollowly sleeved in the first structural member 330, that is, the first structural member 330, the second structural member 430 and the second sun gear 510 are nested in layers in the radial direction of the second sun gear 510, and the central axis of the first structural member 330, the central axis of the second structural member 430 and the central axis of the second sun gear 510 can coincide, so that the first structural member 330, the second structural member 430 and the second sun gear 510 can be prevented from interfering with each other, and the space of the hybrid system 1 can be more effectively utilized. At this time, the second planetary gear 500 is located between the engine 100 and the first planetary gear 200.

[0074] Alternatively, the first structure 330 is loosely mounted on the second structure 430, and the second sun gear 510 is loosely mounted on the second structure 430. In this case, the first structure 330 and the second sun gear 510 are spaced apart along the axial direction of the second structure 430. In this case, the first planetary gear 200 is located between the engine 100 and the second planetary gear 500.

[0075] According to some specific embodiments of the present invention, Figure 1 and Figure 2 As shown, the first ring gear 230 and the second planet carrier 520 are connected as a whole through the third structural member 231 , and the first planet carrier 220 and the second ring gear 530 are connected as a whole through the fourth structural member 531 .

[0076] In this way, the connection strength between the first gear ring 230 and the second planetary carrier 520 is high, which can simplify the processing steps and reduce the difficulty of installation. There is no need to set a transmission structure such as gears between the first gear ring 230 and the second planetary carrier 520, which can greatly reduce power loss. The connection strength between the first planetary carrier 220 and the second gear ring 530 is high, which can simplify the processing steps and reduce the difficulty of installation. There is no need to set a transmission structure such as gears between the first planetary carrier 220 and the second gear ring 530, which can greatly reduce power loss.

[0077] Specifically, the third structure member 231 is located between the first planetary gear 200 and the second planetary gear 500 , and the fourth structure member 531 surrounds the outer side of the third structure member 231 .

[0078] Since the first driving gear 501 is connected to the side of the second planetary gear 540 facing away from the first planetary gear row 200, the third structural member 231 is arranged between the first planetary gear row 200 and the second planetary gear row 500, which can not only avoid interference between the first driving gear 501 and the third structural member 231, but also reduce the size of the third structural member 231, thereby fully utilizing the space on the two opposite axial sides of the second planetary gear 540.

[0079] In addition, the first structural member 330 is connected to the side of the first planetary gear 240 facing the first planetary gear row 200, and the fourth structural member 531 is surrounded on the outside of the third structural member 231, that is, the fourth structural member 531 needs to be connected to the side of the first planetary gear 240 facing away from the first planetary gear row 200, and the fourth structural member 531 is extended to the radial outside of the first planetary gear row 200 and connected to the second ring gear 530, so that the fourth structural member 531 can avoid interference with the first structural member 330 and the third structural member 231.

[0080] In this way, the structure of the hybrid power system 1 is more reasonable. On the one hand, it can realize the power transmission between the first planetary gear 200 and the second planetary gear 500. On the other hand, there will be no interference between the parts, and the reliability is high.

[0081] According to some specific embodiments of the present invention, Figure 1 and Figure 2 As shown, the driven gear 800 is a front driven gear 810, and the first driving gear 501 and the second driving gear 710 are both meshed with the front driven gear 810. In this way, the torque transmitted by the engine 100 and the second motor 700 is coupled at the driven gear 810, the driving force is more sufficient, and the power loss is small.

[0082] Among them, the front driven gear 810 is connected to the front reduction driving gear 910, and the front differential 900 is connected to the front reduction driven gear 920, and the front reduction driving gear 910 is meshed with the front reduction driven gear 920. For example, the front driven gear 800 and the front reduction driving gear 910 can rotate coaxially, and the front differential 900 is connected to the front wheels of the vehicle. By setting the front reduction driving gear 910 and the front reduction driven gear 920, the torque output to the front differential 900 can be increased, and the speed output to the front differential 900 can be reduced, so that the movement of the vehicle is stable and the driving force is greater. By setting the front differential 900, when the vehicle turns, the speed of the left front wheel and the speed of the right front wheel can be different, so that the vehicle can turn smoothly.

[0083] Or, if Figure 8 and Fig. 9 As shown, the driven gear 800 includes a front driven gear 810 and a rear driven gear 820, the first driving gear 501 is meshed with the front driven gear 810, and the second driving gear 710 is meshed with the rear driven gear 820. In this way, the front drive of the hybrid system 1 only has the first motor 600, which reduces the axial size of the front drive of the hybrid system 1 and saves costs. At this time, the vehicle has two driving modes, front drive and rear drive, and the steering performance of the vehicle is better.

[0084] The hybrid system 1 further includes a central control box 950, a first inverter 960, a second inverter 970 and a battery 980. The central control box 950 is connected to the first inverter 960, the second inverter 970 and the battery 980 respectively. The first inverter 960 is connected to the first motor 600, and the second inverter 970 is connected to the second motor 700. The central control box 950 can control whether the battery 980 supplies power to the first motor 600 and whether to supply power to the second motor 700. The first inverter 960 and the second inverter 970 can convert the direct current of the battery 980 into alternating current.

[0085] In addition, the front driven gear 810 is connected to the front reduction driving gear 910, the front differential 900 is connected to the front reduction driven gear 920, and the front reduction driving gear 910 is meshed with the front reduction driven gear 920. For example, the front driven gear 800 and the front reduction driving gear 910 can rotate coaxially, and the front differential 900 is connected to the front wheel of the vehicle. The rear driven gear 820 is connected to the rear reduction driving gear 930, the rear differential 990 is connected to the rear reduction driven gear 940, and the rear reduction driving gear 930 is meshed with the rear reduction driven gear 940. For example, the rear driven gear 8200 and the rear reduction driving gear 930 can rotate coaxially, and the rear differential 990 is connected to the rear wheel of the vehicle.

[0086] By providing the front reduction driving gear 910, the front reduction driven gear 920, the rear reduction driving gear 930 and the rear reduction driven gear 940, the torque output to the front differential 900 and the rear differential 990 can be increased, and the rotation speed output to the front differential 900 and the rear differential 990 can be reduced, so that the movement of the vehicle is stable and the driving force is greater. By providing the front differential 900 and the rear differential 990, when the vehicle turns, the rotation speed of the left wheel and the rotation speed of the right wheel can be different, so that the vehicle can turn smoothly.

[0087] According to some specific embodiments of the present invention, Figure 1 and Figure 2 As shown, the first planetary row 200 further includes a plurality of first planetary gears 240 .

[0088] The first sun gear 210 is transmission-connected to the first motor 600 , the first ring gear 230 is arranged around the first sun gear 210 , each first planetary gear 240 is rotatably mounted on the first planetary carrier 220 and is respectively meshed with the first sun gear 210 and the first ring gear 230 , and a plurality of first planetary gears 240 are arranged at intervals along the circumference of the first sun gear 210 .

[0089] In this way, the power transmission of the first planetary gear 200 itself is stable, and each component rotates smoothly, which is beneficial to the efficiency of the hybrid power system 1.

[0090] The following describes the power transmission of the hybrid system 1 in which the first driving gear 501 and the second driving gear 710 are both meshed with the front driven gear 810 by way of example with reference to the accompanying drawings:

[0091] Wherein, ZR1, ZS1, ZR2, ZS2, ZG1, ZG2, ZG3, ZG4, and ZG5 are respectively the numbers of teeth of the first ring gear 230, the first sun gear 210, the second ring gear 530, the second sun gear 510, the first driving gear 501, the front driven gear 810, the reduction driving gear 910, the reduction driven gear 920, and the second driving gear 710, i1=ZR1 / ZS1, i2=ZR2 / ZS2;

[0092] Assume that NICE, NM1, NM2 are the rotation speeds of the engine 100, the first motor 600, and the second motor 700, respectively; TICE, TM1, TM2 are the torques of the engine 100, the first motor 600, and the second motor 700, respectively; NP2, TP2 are the rotation speed and torque of the second planetary carrier 520, respectively; NOUT, TOUT are the rotation speed and torque of the wheels, respectively.

[0093] It should be noted that in Figure 3-Figure 7 , the engine 100 is an ICE, the first motor 600 is M1, the first clutch 300 is C1, the second clutch 400 is C2, the first brake 550 is B0, the first sun gear 210 is S1, the first planetary carrier 220 is P1, the first ring gear 230 is R1, the second sun gear 510 is S2, the second planetary carrier 520 is P2, and the second ring gear 530 is R2.

[0094] When the hybrid system 1 is in the first gear of the fuel mode, Figure 3 As shown:

[0095]

[0096]

[0097] When the hybrid system 1 is in the fuel mode second gear, if Figure 4 As shown:

[0098]

[0099]

[0100] When the hybrid system 1 is in the third gear of the fuel mode, Figure 5 As shown:

[0101]

[0102]

[0103] When the hybrid system 1 is in pure electric mode, first gear:

[0104]

[0105]

[0106] When the hybrid system 1 is in the second gear of the pure electric mode, Figure 6 As shown:

[0107]

[0108]

[0109] When the hybrid system 1 is in the hybrid drive mode 1st gear:

[0110] NM1=NICE,

[0111]

[0112]

[0113] When the hybrid system 1 is in the hybrid drive mode second gear:

[0114]

[0115]

[0116]

[0117] When the hybrid system 1 is in hybrid drive mode 3:

[0118] NM1=NICE,

[0119]

[0120]

[0121] When the hybrid system 1 is in the hybrid drive continuously variable speed mode, Figure 7 As shown:

[0122] NM1+i1×NR1=NICE×(i1+1),

[0123] TICE:TR1:TM1=(i1+1):i1:1,

[0124]

[0125]

[0126] When hybrid system 1 is in range-extended mode:

[0127]

[0128]

[0129] In another embodiment, the following describes the power transmission of the hybrid system 1 in which the first driving gear 501 is meshed with the front driven gear 810 and the second driving gear 710 is meshed with the rear driven gear 820 by way of example in conjunction with the accompanying drawings:

[0130] Parameters such as the number of teeth of the first ring gear 230, the number of teeth of the first sun gear 210, the number of teeth of the second ring gear 530, the number of teeth of the second sun gear 510, the number of teeth of the first driving gear 501, the number of teeth of the front driven gear 810, the number of teeth of the reduction driving gear 910, the number of teeth of the reduction driven gear 920, the number of teeth of the second driving gear 710, the speed and torque of the engine 100, the speed and torque of the first motor 600, the speed and torque of the second motor 700, the speed and torque of the second planetary carrier 520, and the speed and torque of the wheels remain unchanged.

[0131] In addition, the speed ratio of the rear drive reducer is ir.

[0132] The wheel speed and torque when the hybrid system 1 is in the fuel mode first gear, fuel mode second gear and fuel mode third gear are the same as the wheel speed and torque when the first driving gear 501 and the second driving gear 710 are meshed with the front driven gear.

[0133] When the hybrid system 1 is in the pure electric mode first gear:

[0134] TOUT = TM2 × ir;

[0135] When the hybrid system 1 is in the second gear of the pure electric mode:

[0136]

[0137]

[0138] When the hybrid system 1 is in the hybrid drive mode 1st gear:

[0139] NM1=NICE,

[0140]

[0141]

[0142] When the hybrid system 1 is in the hybrid drive mode second gear:

[0143]

[0144]

[0145]

[0146] When the hybrid system 1 is in hybrid drive mode 3:

[0147] NM1=NICE,

[0148]

[0149]

[0150] When the hybrid system 1 is in the hybrid drive continuously variable speed mode, Figure 7 As shown:

[0151] NM1+i1×NR1=NICE×(i1+1),

[0152] TICE:TR1:TM1=(i1+1):i1:1,

[0153]

[0154]

[0155] When hybrid system 1 is in range-extended mode:

[0156] NOUT=NM2×ir,

[0157] TOUT = TM2 × ir.

[0158] In addition, no matter the first driving gear 501 is meshed with the front driven gear, the second driving gear 710 is meshed with the rear driven gear, or both the first driving gear 501 and the second driving gear 710 are meshed with the front driven gear, the hybrid system 1 also has the following modes:

[0159] The parking power generation mode is the first gear. In this mode, the vehicle stops moving, the second motor 700 does not work, the first clutch 300 is closed, and the engine 100 drives the first motor 600 to generate electricity through the first planetary carrier 220 and the first sun gear 210. At this time, NICE×(i1+1)=NM1, TICE:TM1=(i1+1):1;

[0160] The parking power generation mode second gear, in which the vehicle stops moving, the second motor 700 does not work, the second clutch 400 is closed, and the engine 100 drives the first motor 600 to generate electricity through the first sun gear 210. At this time, NICE=NM1, TICE=TM1;

[0161] Regenerative braking mode, in which the vehicle decelerates and the battery state of charge (SOC) does not exceed the upper limit of the battery SOC, the engine 100 and the first motor 600 do not work, and the wheels drive the deceleration driven gear 920, the deceleration driving gear 910, the driven gear 800 and the second driving gear 710 to rotate through the differential 900, and then the second driving gear 710 drags the second motor 700 to generate electricity, and the second motor 700 can provide braking force to the wheels, and the braking force is opposite to the moving direction of the vehicle to decelerate the vehicle, and the energy generated by the second motor 700 can be stored in the battery of the vehicle;

[0162] Mechanical braking mode, in which the vehicle decelerates and the battery state of charge exceeds the upper limit of the battery SOC, the first motor 600, the second motor 700 and the engine 100 do not work, and a braking force is provided by the brake pedal to decelerate the vehicle;

[0163] Combined braking mode: In this mode, the vehicle decelerates, the engine 100 and the first motor 600 do not work, the battery state of charge (SOC) does not exceed the battery SOC upper limit, and the regenerative braking mode alone cannot meet the braking needs of the vehicle, and the combined braking mode is entered. On the one hand, the wheels drive the deceleration driven gear 920, the deceleration driving gear 910, the driven gear 800 and the second driving gear 710 to rotate through the differential 900, and then the second driving gear 710 drags the second motor 700 to generate electricity. The second motor 700 can provide braking force to the wheels. On the other hand, the braking force is provided through the brake pedal. The directions of the above two braking forces are opposite to the direction of vehicle movement, and the vehicle is decelerated together.

[0164] In the reverse gear mode, the engine 100 and the first motor 600 may not work, and the second motor 700 may rotate in reverse. The power of the second motor 700 is transmitted to the differential 900 through the second driving gear 710, the driven gear 800, the reduction driving gear 910 and the reduction driven gear 920, so that the vehicle moves backward. When the second motor 700 rotates forward (for example, clockwise), the power of the second motor 700 drives the vehicle to move forward. When the second motor 700 rotates in reverse (for example, counterclockwise), the power of the second motor 700 drives the vehicle to move backward. The clockwise rotation and the counterclockwise rotation are observed from the same end of the axial direction of the second motor 700.

[0165] Vehicle starting mode: When the vehicle starts under normal circumstances, usually only the second motor 700 provides power to drive the vehicle to start. If the starting torque required is large under special circumstances such as uphill, the first motor 600 can start the engine 100, and the engine 100 and the second motor 700 jointly provide power to drive the vehicle to start;

[0166] In the low-load hybrid mode, part of the power of the engine 100 is used to drive the vehicle to move, and another part of the power of the engine 100 is used to drive the first motor 600 to generate electricity. The energy generated by the first motor 600 can be transmitted to the second motor 700 as the input power of the second motor 700; if the battery SOC does not exceed the battery SOC upper limit, the energy generated by the first motor 600 can be stored in the battery of the vehicle;

[0167] In high-speed cruising mode, the hybrid power system 1 is in the third gear of the fuel mode or the hybrid drive continuously variable transmission mode. When the hybrid power system 1 is in the third gear of the fuel mode, the second motor 700 is in a power generation state, and the engine 100 drives the vehicle to move, and the transmission efficiency is high; when the hybrid power system 1 is in the hybrid drive continuously variable transmission mode, the power of the engine 100 can be fully used to drive the vehicle to move, and the first motor 600 runs at a negative speed, and the power of the first motor 600 is also used to drive the vehicle to move, and at this time the second motor 700 is in a power generation state.

[0168] For example, when the hybrid system 1 is in the above-mentioned different modes, the states of the first clutch 300, the second clutch 400 and the first brake 550 are shown in the following table, wherein the table with black dots represents that the corresponding clutch is closed in the corresponding mode, or the table with black dots represents that the first brake 550 applies braking to the second sun gear 510 in the corresponding mode:

[0169]

[0170]

[0171] Alternatively, if Figure 2 As shown, when the first driving gear 501 and the second driving gear 710 are both engaged with the front driven gear 810, the hybrid system 1 further includes a second brake 560. The second brake 560 is connected to the fourth structural member 531 and is used to control whether to apply a brake to the fourth structural member 531. The hybrid system 1 can add a pure electric mode and a fuel reverse mode.

[0172] When the hybrid system 1 is in the newly added pure electric mode, the second brake 560 is closed to apply braking to the fourth structural member 531 so that the first planetary carrier 220 and the second ring gear 530 do not rotate, and the power of the first motor 600 is transmitted to the first driving gear 501 and the driven gear 800 through the double planetary gear set, and the ratio of the rotation speed of the first motor 600 to the rotation speed of the driven gear 800 is a fixed value.

[0173] When the hybrid system 1 is in the fuel reverse gear mode, the second brake 560 is closed to apply braking to the fourth structural member 531 so that the first planetary carrier 220 and the second ring gear 530 do not rotate, the second clutch 400 is closed, and the power of the engine 100 is transmitted to the first driving gear 501 and the driven gear 800 through the double planetary gear. At this time, the direction of rotation of the first driving gear 501 is opposite to that of the engine 100, and the ratio of the rotation speed of the engine 100 to the rotation speed of the driven gear 800 is a fixed value, so the hybrid system 1 realizes a fixed speed ratio reverse gear for the vehicle.

[0174] According to some specific embodiments of the present invention, Figure 1 and Figure 2 As shown, the first planetary gear 200 and the second planetary gear 500 are arranged between the engine 100 and the first motor 600, and the engine 100 and the first motor 600 are arranged coaxially. The second motor 700 and the first motor 600 are arranged off-axis, and the second motor 700 and the first motor 600 are located on the same side of the first planetary gear 200 and the second planetary gear 500.

[0175] In this way, the axial direction of the first motor 600 is parallel to and does not overlap with the axial direction of the second motor 700, which can reduce the overall axial dimension of the hybrid system 1, so as to facilitate the layout of the hybrid system 1. And because the second motor 700 and the first motor 600 generate less heat when working, the second motor 700 and the first motor 600 have lower requirements for heat dissipation, so the second motor 700 and the first motor 600 are arranged at one end of the axial direction of the hybrid system 1, and the engine 100 is arranged at the other end of the axial direction of the hybrid system 1, which is conducive to optimizing the heat dissipation performance of the engine 100.

[0176] A vehicle according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The vehicle includes a hybrid system 1 according to the above-described embodiment of the present invention.

[0177] The vehicle according to the embodiment of the present invention has the advantages of multiple modes, simple structure and high applicability by utilizing the hybrid power system 1 according to the above embodiment of the present invention.

[0178] Other configurations and operations of the hybrid system 1 and the vehicle having the same according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail herein.

[0179] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0180] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A hybrid power system, characterized in that: include: an engine having an engine output shaft; A first planetary gear, the first planetary gear comprising a first sun gear, a first planet carrier and a first ring gear which are drivingly connected; a first clutch, the first clutch being connected to the engine output shaft and the first planet carrier respectively, and being used to control whether power is transmitted between the engine output shaft and the first planet carrier; a second clutch, the second clutch being connected to the engine output shaft and the first sun gear respectively, and being used for controlling whether power is transmitted between the engine output shaft and the first sun gear; A second planetary row, the second planetary row is drivingly connected to the first ring gear and the first planet carrier respectively, the second planetary row comprises a second sun gear, and the second planetary row is connected to a first driving gear; a first brake, the first brake being connected to the second sun gear and being used to control whether to apply braking to the second sun gear; A first motor, the first motor is drivingly connected to the first planetary gear; A second motor, wherein the second motor is connected to a second driving gear; A driven gear is meshed with the first driving gear and the second driving gear respectively.

2. The hybrid power system according to claim 1, characterized in that: The second planetary gear comprises: a second ring gear, the second ring gear being arranged around the second sun gear and drivingly connected to the first planet carrier; a second planet carrier, the second planet carrier being transmission-connected to the first ring gear and the first driving gear respectively; a plurality of second planetary gears, each of which is rotatably mounted on the second planet carrier and meshes with the second sun gear and the second ring gear respectively, and the plurality of second planetary gears are arranged at intervals along the circumference of the second sun gear; The first planetary gear also includes a plurality of first planetary gears, the first sun gear is drivingly connected to the first motor, the first ring gear is arranged around the first sun gear, each of the first planetary gears is rotatably mounted on the first planetary carrier and is respectively meshed with the first sun gear and the first ring gear, and the plurality of first planetary gears are arranged at intervals along the circumference of the first sun gear.

3. The hybrid power system according to claim 1, characterized in that: The first clutch comprises a first active end and a first driven end which can be engaged with and separated from each other, the first active end is drivingly connected to the engine output shaft, and the first driven end is drivingly connected to the first planet carrier; The second clutch comprises a second active end and a second driven end which can be engaged with and separated from each other, the second active end is drivingly connected to the engine output shaft, and the second driven end is drivingly connected to the first sun gear; The first active end and the second active end are formed as one body; The first driven end and the second driven end are arranged along the axial direction of the engine output shaft.

4. The hybrid power system according to claim 3, characterized in that: The first driven end and the first planet carrier are connected as one body through a first structural member; The second driven end and the first sun gear are connected as one body through a second structural member.

5. The hybrid power system according to claim 4, characterized in that: The first structural member is connected to a side of the first planet carrier facing the engine; The second structural member is connected to a side of the first sun gear facing the engine.

6. The hybrid power system according to claim 5, characterized in that: The first structural member is hollowly sleeved on the second structural member, and the second sun gear is hollowly sleeved on the first structural member and the second structural member; Alternatively, the first structural member is loosely mounted on the second structural member, and the second sun gear is loosely mounted on the second structural member.

7. The hybrid power system according to claim 2, characterized in that: The first ring gear and the second planet carrier are connected as one body via a third structural member; The first planet carrier and the second ring gear are connected as one body via a fourth structural member; The third structural member is located between the first planetary gear and the second planetary gear; The fourth structure surrounds the outer side of the third structure.

8. The hybrid power system according to claim 7, characterized in that: Also includes; The second brake is connected to the fourth structural member and is used to control whether to apply braking to the fourth structural member.

9. The hybrid power system according to claim 1, characterized in that: The driven gear is a front-drive driven gear, and both the first driving gear and the second driving gear are meshed with the front-drive driven gear; or The driven gears include a front driven gear and a rear driven gear, the first driving gear is meshed with the front driven gear, and the second driving gear is meshed with the rear driven gear.

10. The hybrid power system according to any one of claims 1 to 9, characterized in that: The first planetary gear and the second planetary gear are arranged between the engine and the first motor, and the engine and the first motor are coaxially arranged; The second motor and the first motor are arranged on different axes, and the second motor and the first motor are located on the same side of the first planetary gear and the second planetary gear.

11. A vehicle, characterized in that: include: A hybrid power system according to any one of claims 1 to 10.

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