Hybrid system and vehicle having the same

Abstract

The present invention discloses a hybrid power system and a vehicle having the same, the hybrid power system comprising: an engine, the engine having an engine output shaft; a first planetary gear, the first planetary gear comprising a first planetary carrier and a first sun gear, the first planetary carrier being connected to the engine output shaft, the first sun gear being loosely connected to the engine output shaft; a second planetary gear, the second planetary gear being transmission-connected to the first planetary gear, the second planetary gear comprising a second sun gear; a first motor, the first motor being connected to the second sun gear; a second motor, the second motor outputting power through a differential, and the second motor being connected to the first sun gear. The hybrid power system according to the embodiment of the present invention has the advantages of compact and simple structure, small axial size, low cost, fast mode switching speed, good vehicle fuel economy and good energy-saving effect.

Description

Technical Field

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

[0002] Vehicles in related technologies, especially electric vehicles, usually have an engine and a motor. The vehicle is in pure electric mode when it is driven only by the motor, and in hybrid mode when it is driven by both the motor and the engine. The vehicle adapts to different operating scenarios by changing different driving modes to meet the vehicle's torque and speed requirements. However, the engine and motor usually use a clutch to realize power transmission and disconnection. The vehicle has a low switching rate between pure electric mode and hybrid mode, and the production cost is high. 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 high mode switching rate and low production cost.

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

[0005] In order to achieve the above-mentioned purpose, a hybrid power system is proposed 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 planetary carrier and a first sun gear, the first planetary carrier being connected to the engine output shaft, and the first sun gear being loosely connected to the engine output shaft; a second planetary gear, the second planetary gear being transmission-connected to the first planetary gear, the second planetary gear comprising a second sun gear; a first motor, the first motor being connected to the second sun gear; and a second motor, the second motor outputting power through a differential, and the second motor being connected to the first sun gear.

[0006] The hybrid power system according to the embodiment of the present invention has the advantages of high mode switching rate and low production cost.

[0007] According to some embodiments of the present invention, the engine outputs power through the first planetary gear, and the engine drives the first motor through the first planetary gear and the second planetary gear.

[0008] According to some embodiments of the present invention, the first planetary gear includes: a first ring gear, which is arranged around the first sun gear and is drivingly connected to the second planetary gear; a plurality of first planetary gears, 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 the plurality of first planetary gears are arranged at intervals along the circumference of the first sun gear.

[0009] According to some embodiments of the present invention, the second planetary gear includes: a second planet carrier, which is connected to the first ring gear; a second ring gear, which is connected to the first planet carrier; 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 the plurality of second planetary gears are arranged at intervals along the circumference of the second sun gear.

[0010] According to some embodiments of the present invention, the first planet carrier is connected to the second ring gear to form a first connecting member; and / or the second planet carrier is connected to the first ring gear to form a second connecting member.

[0011] According to some embodiments of the present invention, both the first connecting member and the second connecting member are integral members.

[0012] According to some embodiments of the present invention, the first connecting member is located on an inner side of the second connecting member.

[0013] 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, the engine and the first motor are arranged coaxially; the second motor and the first motor are arranged off-axis.

[0014] According to some embodiments of the present invention, the hybrid power system further comprises: a one-way locking mechanism, which cooperates with the engine output shaft and only allows the engine output shaft to rotate in one direction: clockwise or counterclockwise.

[0015] According to a second aspect of the present invention, a vehicle is provided, comprising the hybrid power system according to the first aspect of the present invention.

[0016] The vehicle according to the second embodiment of the present invention has the advantages of high mode switching rate and low production cost by utilizing the hybrid power system according to the first embodiment of the present invention.

[0017] 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

[0018] 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:

[0019] Figure 1 is a schematic diagram of a hybrid power system according to an embodiment of the present invention.

[0020] Figure 2 is a schematic diagram of a hybrid power system according to another embodiment of the present invention.

[0021] Reference numerals:

[0022] Hybrid system1.

[0023] The engine 100, the first planetary gear 110, the first sun gear 111, the first ring gear 112, the first planetary carrier 113, the first planetary gear 114, the first driving gear 120,

[0024] The first motor 200, the second planetary gear 210, the second sun gear 211, the second ring gear 212, the second planetary carrier 213, the second planetary gear 214,

[0025] The second motor 300, the second driving gear 310, the driven gear 320,

[0026] One-way locking mechanism 400,

[0027] The differential 500 , the speed reduction driving gear 510 , and the speed reduction driven gear 520 . DETAILED DESCRIPTION

[0028] 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.

[0029] In the description of the present invention, it should 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" and the like indicate orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] In the description of the present invention, "plurality" means two or more.

[0031] Hereinafter, a hybrid system 1 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0032] like Figure 1 and Figure 2 As shown, the hybrid system 1 includes an engine 100 , a first planetary gear 110 , a second planetary gear 210 , a first motor 200 , and a second motor 300 .

[0033] The engine 100 has an engine output shaft, the first planetary row 110 includes a first planetary carrier 113 and a first sun gear 111, the first planetary carrier 113 is connected to the engine output shaft, the first sun gear 111 is loosely mounted on the engine output shaft, the second planetary row 210 is transmission-connected to the first planetary row 110, the second planetary row 210 includes a second sun gear 211, the first motor 200 is connected to the second sun gear 211, the second motor 300 outputs power through the differential 500, and the second motor 300 is connected to the first sun gear 211.

[0034] For example, the first motor 200 can be connected to the second motor 300 and the battery of the vehicle. When the state of charge (SOC) of the battery is at a low level, the power generated by the first motor 200 can charge the battery of the vehicle; when the state of charge of the battery is not at a low level, the power generated by the first motor 200 can directly power the second motor 300. The second motor 300 can be connected to the battery of the vehicle, and the battery of the vehicle can power the second motor 300.

[0035] According to the hybrid system 1 of the embodiment of the present invention, the second motor 300 outputs power through the differential 500, and the second motor 300 is connected to the first sun gear 211. When the second motor 300 drives the vehicle alone, the engine 100 and the first motor 200 do not rotate, and the first planetary carrier 113 does not rotate at this time. The second motor 300 drives the gear pair of the first planetary gear 110 and the second planetary gear 210 through the first sun gear 111, and the vehicle is in pure electric mode.

[0036] When the second motor 300 and the engine 100 operate together and drive the vehicle to move, the vehicle is in hybrid mode. When the vehicle switches from pure electric mode to hybrid mode, the first motor 200 works first, and the first motor 200 drags the engine 100 through the first planetary gear 110 and the second planetary gear 210, and at this time the second motor 300 can indirectly drive the engine 100 to rotate through the first sun gear 111, so the speed of the engine 100 can reach the starting speed faster. In this way, the hybrid system 1 can achieve rapid switching from pure electric mode to hybrid mode, and improve the switching rate of the mode.

[0037] In addition, through the arrangement of the first planetary gear 110 and the second planetary gear 210, the hybrid power system 1 of the embodiment of the present invention does not need to be provided with a clutch, that is, the vehicle's hybrid mode and pure electric mode can be switched. While ensuring the driving force range and the driving force variable range of the hybrid power system 1, it can greatly reduce the production cost, further simplify the structure, and reduce the installation space.

[0038] In addition, the engine 100 is connected to the second planetary gear 210 and the first motor 200 through the first planetary gear 110. When the first motor 200 and the engine 100 are running at the same time and the vehicle is moving, part of the power of the engine 100 is used to drive the vehicle to run, and the other part of the power of the engine 100 is used to drive the first motor 200 to generate electricity. This reduces the power cycle and thus reduces the energy consumption of the system; on the other hand, the power of the first motor 200 and the second motor 300 can be reduced, thereby reducing the cost.

[0039] Since the hybrid power system 1 of the embodiment of the present invention can change the power used by the engine 100 to drive the vehicle, the vehicle also has good power performance when climbing a slope with medium, low or heavy loads, which is conducive to improving the working efficiency of the engine 100, and the hybrid power system 1 has better economy. In other words, the hybrid power system 1 can realize electronically controlled continuously variable speed change to achieve more flexible speed regulation and a wider speed regulation range, thereby optimizing the working range of the engine 100 and improving the working efficiency of the hybrid power system 1.

[0040] As such, the hybrid power system 1 according to the embodiment of the present invention has the advantages of high mode switching rate and low production cost.

[0041] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the engine 100 outputs power through the first planetary gear 110, and the engine 100 can drive the vehicle to run alone through the first planetary gear 110. And the engine 100 drives the first motor 200 through the first planetary gear 110 and the second planetary gear 210, that is, the engine 100 is transmitted to the first motor 200 through the double planetary gear, so the load borne by each planetary gear alone is reduced.

[0042] This not only improves the service life of the two planetary gears, but also reduces the volume of each planetary gear, requiring a small installation space, which is conducive to the miniaturization of the hybrid power system 1. Since the upper limit of the load and the upper limit of the torque that the two planetary gears can bear as a whole are improved, the hybrid power system 1 can select an engine 100 with a larger output power to provide a larger driving force range, which is conducive to improving the adaptability of the vehicle to the driving environment.

[0043] In some embodiments of the present invention, the engine output shaft is connected to the first driving gear 120 through the first planetary gear 110, the second motor 300 is connected to the second driving gear 310, the driven gear 320 is respectively meshed with the first driving gear 120 and the second driving gear 310, and the driven gear 320 is drivingly connected to the differential 500.

[0044] According to some embodiments of the present invention, Figure 1 and Figure 2As shown, the first planetary gear set 110 further includes a first ring gear 112 and a plurality of first planetary gears 114 .

[0045] The first sun gear 111 is transmission connected to the first driving gear 120, the first ring gear 112 is arranged around the first sun gear 111 and is transmission connected to the second planetary row 210, the first planet carrier 113 is transmission connected to the engine output shaft and the second planetary row 210 respectively, each first planetary gear 114 is rotatably mounted on the first planet carrier 113 and is respectively meshed with the first sun gear 111 and the first ring gear 112, and multiple first planetary gears 114 are arranged at intervals along the circumference of the first sun gear 111.

[0046] For example, the first sun gear 111 and the first driving gear 120 can rotate coaxially, for example, the first sun gear 111 and the first driving gear 120 are integrally formed. The first planet carrier 113 and the engine output shaft can rotate coaxially, for example, the first planet carrier 113 and the engine output shaft are integrally formed. The rotation speed of the first planet carrier 113 is the same as the revolution speed of the plurality of first planetary gears 114 around the first sun gear 111, and the rotation direction of the first planet carrier 113 is the same as the revolution direction of the plurality of first planetary gears 114 around the first sun gear 111.

[0047] In this way, it is convenient to transmit the power of the engine 100 to the first driving gear 120 and the second planetary gear 210, so as to realize the first motor 200 to generate electricity and drive the vehicle to move. In addition, there are two power transmission modes between the first planetary gear 110 and the second planetary gear 210, that is, the first planetary gear 110 can transmit power to the second planetary gear 210 through the first ring gear 112 and the first planetary carrier 113, so that the power of the engine 100 can be more conveniently transmitted to the first motor 200, and the overall power loss of the system is lower.

[0048] Optionally, the first driving gear 120 is located on the side of the first sun gear 111 facing the engine 100, that is, the first driving gear 120 is located on the side of the first planetary row 110 facing away from the second planetary row 210. In this way, not only can the first driving gear 120 be prevented from interfering with the power transmission between the first planetary row 110 and the second planetary row 210, but also the distance between the first planetary row 110 and the second planetary row 210 is closer, and the layout of the hybrid power system 1 is more compact.

[0049] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the second transmission assembly further includes a second ring gear 212 , a second planet carrier 213 and a plurality of second planetary gears 214 .

[0050] The second sun gear 211 is drivingly connected to the output shaft of the first motor, the second ring gear 212 is arranged around the second sun gear 211 and is connected to the first planetary carrier 113, the second planetary carrier 213 is connected to the first ring gear 112, each second planetary gear 214 is rotatably mounted on the second planetary carrier 213 and is respectively meshed with the second sun gear 211 and the second ring gear 212, and multiple second planetary gears 214 are arranged at circumferential intervals along the second sun gear 211.

[0051] For example, the second sun gear 211 and the first motor output shaft can rotate coaxially, for example, the second sun gear 211 and the first motor output shaft are integrally formed. The second planet carrier 213 and the first ring gear 112 can rotate coaxially, for example, the second planet carrier 213 and the first ring gear 112 are integrally formed. The second ring gear 212 and the first planet carrier 113 can rotate coaxially, for example, the second ring gear 212 and the first planet carrier 113 are integrally formed. The rotation speed of the second planet carrier 213 is the same as the revolution speed of the plurality of second planetary gears 214 around the second sun gear 211, and the rotation direction of the second planet carrier 213 is the same as the revolution direction of the plurality of second planetary gears 214 around the second sun gear 211.

[0052] Two power transmission modes between the first planetary gear 110 and the second planetary gear 210 are described below:

[0053] The first power transmission method: first, the engine 100 drives the first planetary carrier 113 to rotate; then, the first planetary carrier 113 drives the multiple first planetary gears 114 to revolve around the first sun gear 111 and each first planetary gear 114 rotates, and at this time, the multiple first planetary gears 114 jointly drive the first ring gear 112 to rotate; next, the first ring gear 112 drives each second planetary gear 214 to rotate and the multiple second planetary gears 214 revolve around the second sun gear 211, and at this time, the multiple second planetary gears 214 drive the second sun gear 211 to rotate; finally, the second sun gear 211 drives the first motor 200 to rotate.

[0054] The second power transmission method: first, the engine 100 drives the first planetary carrier 113 to rotate; then, the second ring gear 212 of the first planetary carrier 113 rotates; next, the second ring gear 212 drives each second planetary gear 214 to rotate and multiple second planetary gears 214 revolve around the second sun gear 211, and at this time, multiple second planetary gears 214 drive the second sun gear 211 to rotate; finally, the second sun gear 211 drives the first motor 200 to rotate.

[0055] In this way, by setting the first planetary row 110 and the second planetary row 210, the power transmission efficiency of the hybrid system 1 can be improved, and the power transmission between the first planetary row 110 and the second planetary row 210 does not need to be matched with an outer ring gear, so that the torque stress demand between the first planetary row 110 and the second planetary row 210 is reduced, so as to reduce the size and volume of the first planetary row 110 and the second planetary row 210, which is beneficial to improve the adjustable range of the overall transmission ratio of the first planetary row 110 and the second planetary row 210.

[0056] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the first planet carrier 113 is connected to the second gear ring 212 to form a first connecting member, for example, the first planet carrier 113 is fixedly connected to the second gear ring 212, and / or, the second planet carrier 213 is connected to the first gear ring 112 to form a second connecting member, for example, the second planet carrier 213 is fixedly connected to the first gear ring 112. In this way, the mechanical strength of the first planet carrier 113 and the second gear ring 212 is better, and since there is no gap between the first planet carrier 113 and the second gear ring 212, the transmission error between the first planet carrier 113 and the second gear ring 212 is small. Similarly, the mechanical strength of the second planet carrier 213 and the first gear ring 112 is better, and since there is no gap between the second planet carrier 213 and the first gear ring 112, the transmission error between the second planet carrier 213 and the first gear ring 112 is small. It can be seen that the overall transmission error of the hybrid system 1 is reduced.

[0057] Furthermore, the first connecting member and the second connecting member are both integral members. In this way, the connection strength between the first planetary carrier 113 and the second ring gear 212 is further improved, and the production steps of the first connecting member are reduced, and the production efficiency is improved. Similarly, the connection strength between the second planetary carrier 213 and the first ring gear 112 is further improved, and the production steps of the first connecting member are reduced, and the production efficiency is improved. It can be seen that the overall structural strength and production efficiency of the hybrid system 1 are higher.

[0058] Specifically, the first connecting member is located inside the second connecting member, so that the hybrid system 1 has a more compact structure.

[0059] Optionally, the first planet carrier 113 is coaxially arranged with the second sun gear 211. In this way, the radial dimensions of the first planet row 110 and the second planet row 210 as a whole are small, and power transmission is convenient, and the structural arrangement is simple.

[0060] According to some embodiments of the present invention, Figure 1 and Figure 2As shown, the first planet carrier 113 is located on the side of the first planetary gear 114 facing the second planetary row 210, so that the distance between the first planet carrier 113 and the second planetary row 210 is relatively close, which facilitates the connection between the first planet carrier 113 and the second ring gear 212. The second planet carrier 213 is located on the side of the second planetary gear 214 facing away from the first planetary row 110, and the connection part between the first ring gear 112 and the second planet carrier 213 is located outside the connection part between the second ring gear 212 and the first planet carrier 113. In this way, while realizing the connection between the first ring gear 112 and the second planet carrier 213, interference with the power transmission between the first planetary row 110 and the second planetary row 210 can be avoided.

[0061] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the first planetary gear 110 and the second planetary gear 210 are arranged between the engine 100 and the first motor 200, the engine 100 and the first motor 200 are arranged coaxially, and the second motor 300 and the first motor 200 are arranged off-axis. The second motor 300 and the first motor 200 are located on the same side of the first planetary gear 110 and the second planetary gear 210.

[0062] In this way, the axial direction of the first motor 200 is parallel to and does not overlap with the axial direction of the second motor 300, 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 300 and the first motor 200 generate less heat when working, the second motor 300 and the first motor 200 have lower requirements for heat dissipation, so the second motor 300 and the first motor 200 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.

[0063] like Figure 1 and Figure 2 As shown, the driven gear 320 is connected to the reduction driving gear 510, and the differential 500 is connected to the reduction driven gear 520, and the reduction driving gear 510 is meshed with the reduction driven gear 520. Among them, the driven gear 320 and the reduction driving gear 510 can rotate coaxially, for example, the driven gear 320 and the reduction driving gear 510 are integrally formed. By providing the reduction driving gear 510 and the reduction driven gear 520, the torque output to the differential 500 can be increased, and the speed output to the differential 500 can be reduced, so that the movement of the vehicle is stable and the driving force is greater.

[0064] The following examples describe the power transmission routes of the hybrid system 1 in different modes:

[0065] Starting mode: Under normal starting conditions, the second motor 300 provides power to drive the vehicle to start; when the vehicle requires a large torque to start, such as when the vehicle starts on an uphill slope, the first motor 200 first starts the engine 100, and then the engine 100 and the second motor 300 jointly drive the vehicle to start.

[0066] Parking power generation mode: the vehicle stops moving, the second motor 300 does not work, and the first driving gear 120, the second driving gear 310 and the driven gear 320 all stop rotating, the first sun gear 111 stops rotating as the first driving gear 120 stops rotating, and the power of the engine 100 is fully transmitted to the first motor 200 through the first planetary gear 110 and the second planetary gear 210 to drive the first motor 200 to generate electricity.

[0067] Pure electric mode: the second motor 300 is working, the engine 100 and the first motor 200 are not working, and the power of the second motor 300 is transmitted to the differential 500 through the second driving gear 310 and the driven gear 320, as well as the reduction driving gear 510 and the reduction driven gear 520 to drive the vehicle.

[0068] Hybrid driving mode: the first motor 200, the second motor 300 and the engine 100 are all working. When the first motor 200 outputs power to drive the vehicle, the power of the engine 100 is all used to drive the vehicle. When the first motor 200 participates in power generation, part of the power of the engine 100 drives the vehicle, and the other part of the power of the engine 100 drives the first motor 200 to generate electricity. At this time, the second motor 300 drives the vehicle or participates in power generation.

[0069] Regenerative braking mode: During vehicle deceleration, when the state of charge (SOC) of the vehicle battery does not exceed the upper limit of the battery state of charge, the vehicle enters the regenerative braking mode. At this time, the engine 100 and the first motor 200 do not work, and the power of the differential 500 is transmitted to the second motor 300 through the reduction driving gear 510 and the reduction driven gear 520, as well as the second driving gear 310 and the driven gear 320. At this time, the second motor 300 generates electricity. On the one hand, the second motor 300 can generate energy to reduce the energy consumption of the vehicle. On the other hand, the second motor 300 can provide braking force to decelerate the vehicle.

[0070] Mechanical braking mode: During vehicle deceleration, when the state of charge (SOC) of the vehicle battery exceeds the upper limit of the battery state of charge, the vehicle needs to enter the mechanical braking mode. At this time, the second motor 300, the engine 100 and the first motor 200 are not working, and the braking force is provided by the brake pedal to meet the vehicle braking requirements.

[0071] Combined braking mode: During the vehicle deceleration process, when the state of charge (SOC) of the vehicle battery does not exceed the upper limit of the battery state of charge, and the regenerative braking mode alone cannot meet the vehicle's braking needs, the vehicle enters the combined braking mode, and the engine 100 and the first motor 200 do not work. On the one hand, the power of the differential 500 is transmitted to the second motor 300 through the reduction driving gear 510 and the reduction driven gear 520, as well as the second driving gear 310 and the driven gear 320. At this time, the second motor 300 generates electricity and provides braking force; on the other hand, the braking force is provided through the brake pedal. The above two braking forces brake the vehicle together to meet the vehicle's braking needs and decelerate the vehicle.

[0072] Reverse gear mode: the second motor 300 reverses (when the second motor 300 rotates forward, the second motor 300 drives the vehicle to move toward at least one of the front, left or right sides of the vehicle, and the forward rotation direction of the second motor 300 and the reverse rotation direction of the second motor 300 are opposite directions of the axial direction of the second motor 300), and the power of the second motor 300 is transmitted to the differential 500 through the second driving gear 310 and the driven gear 320, as well as the reduction driving gear 510 and the reduction driven gear 520, so that the vehicle moves backward and realizes the reverse gear function.

[0073] Low-load hybrid mode: At this time, part of the power of the engine 100 is used to drive the vehicle, and the other part of the power of the engine 100 is used to drive the first motor 200 to generate electricity.

[0074] High-speed cruising mode: All the power of the engine 100 is used to drive the vehicle, and the rotation direction of the first motor 200 is opposite to that of the engine 100. The power of the first motor 200 is also used to drive the vehicle. At this time, the second motor is in a power generation state.

[0075] The following example describes the relationship between the power transmission of the engine 100, the first motor 200 and the second motor 300:

[0076] Assume that ZR1, ZS1, ZR2, ZS2, ZG1, ZG2, ZG3, ZG4, and ZG5 are respectively the number of teeth of the first ring gear 112, the number of teeth of the first sun gear 111, the number of teeth of the second ring gear 212, the number of teeth of the second sun gear 211, the number of teeth of the first driving gear 120, the number of teeth of the driven gear 320, the number of teeth of the reduction driving gear 510, the number of teeth of the reduction driven gear 520, and the number of teeth of the second driving gear 310, wherein i1= ZR1 / ZS1, i2= ZR2 / ZS2;

[0077] NICE and TICE are the speed and torque of the engine 100 , NM1 and TM1 are the speed and torque of the first motor 200 , NM2 and TM2 are the speed and torque of the second motor 300 , NOUT and TOUT are the speed and torque of the wheels, NS2 and TS2 are the speed and torque of the second sun gear 211 ;

[0078] When the hybrid system 1 is in parking power generation mode: NICE*(i1+i2+1)=NM1*i1; TICE:TM1=(i1+i2+1):i1;

[0079] When the hybrid system 1 is in pure electric mode: NOUT=NM2 / (ZG2 / ZG5*ZG4 / ZG3); TOUT=TM2*(ZG2 / ZG5*ZG4 / ZG3);

[0080] When the hybrid system 1 is in the hybrid driving mode: NM1*i1+(i2+1)*NS2=(i1+i2+1)*NICE; TICE:TS2:TM1=(i1+i2+1):(i2+1):i1; NOUT=NS2 / (ZG2 / ZG1*ZG4 / ZG3); TOUT=TS2*(ZG2 / ZG1*ZG4 / ZG3)+TM2*(ZG2 / ZG5*ZG4 / ZG3).

[0081] According to some embodiments of the present invention, Figure 2 As shown, the hybrid system 1 further includes a one-way locking mechanism 400, which cooperates with the engine output shaft and allows the engine 100 output shaft to rotate in only one direction, clockwise or counterclockwise. The one-way locking mechanism 400 can be a one-way clutch or a one-way bearing.

[0082] For example, the engine 100 rotates clockwise, which is the normal rotation direction of the engine 100. The engine 100 can drive the vehicle to move and drive the first motor 200 to generate electricity when rotating in the clockwise direction. When the first motor 200 outputs power, the engine 100 will not rotate counterclockwise due to the setting of the one-way locking mechanism 400. In this way, when the engine 100 is not working, the first motor 200 can drive the vehicle to move alone, or the first motor 200 and the second motor 300 can drive the vehicle to move together.

[0083] The following examples describe the power transmission methods of the above two working modes:

[0084] 1. The first motor 200 drives the vehicle to move alone. When the first motor 200 can rotate counterclockwise, the input shaft of the engine 100, the first ring gear 112, and the first planetary carrier 113 are restricted by the one-way locking mechanism 400 and cannot rotate counterclockwise. The power of the engine 100 is transmitted to the differential 500 through the first planetary gear 110 and the second planetary gear 210 to drive the vehicle forward.

[0085] 2. The first motor 200 and the second motor 300 jointly drive the vehicle to move. When the first motor 200 can rotate in the counterclockwise direction, the input shaft of the engine 100, the first ring gear 112, and the first planetary carrier 113 are restricted by the one-way locking mechanism 400 and cannot rotate in the counterclockwise direction. The power of the engine 100 is transmitted to the differential 500 through the first planetary gear 110 and the second planetary gear 210, and the power of the second motor 300 is transmitted to the wheels through the second driving gear 310 and the driven gear 320, as well as the reduction driving gear 510 and the reduction driven gear 520. The above two powers jointly drive the vehicle forward.

[0086] 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.

[0087] The vehicle according to the embodiment of the present invention has the advantages of high mode switching rate and low production cost by utilizing the hybrid power system 1 according to the above-mentioned embodiment of the present invention.

[0088] 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.

[0089] 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.

[0090] 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 comprises a first planet carrier and a first sun gear, the first planet carrier is connected to the engine output shaft, and the first sun gear is loosely connected to the engine output shaft; a second planetary gear, the second planetary gear is drivingly connected to the first planetary gear, and the second planetary gear comprises a second sun gear; The engine output shaft is connected to the first driving gear through the first planetary gear, the first sun gear is drivingly connected to the first driving gear, and the first driving gear is located on the side of the first planetary gear facing away from the second planetary gear; a first motor, the first motor being connected to the second sun gear; a second motor, the second motor outputs power through a differential, and the second motor is connected to the first sun gear; The second motor is connected to the second driving gear, the driven gear is always meshed with the first driving gear and the second driving gear respectively, and the driven gear is drivingly connected to the differential; The engine outputs power through the first planetary gear, and the engine drives the first motor through the first planetary gear and the second planetary gear; 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.

2. The hybrid power system according to claim 1, characterized in that: The first planetary gear set further comprises: a first ring gear, the first ring gear being arranged around the first sun gear and drivingly connected to the second planetary gear; A plurality of first planetary gears are provided, each of the first planetary gears is rotatably mounted on the first planet carrier and is respectively meshed with the first sun gear and the first ring gear, and the plurality of first planetary gears are spaced apart along the circumference of the first sun gear.

3. The hybrid power system according to claim 2, characterized in that: The second planetary gear set further comprises: a second planet carrier, the second planet carrier being connected to the first ring gear; a second ring gear connected to the first planet carrier; 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 spaced apart along the circumference of the second sun gear.

4. The hybrid power system according to claim 3, characterized in that: The first planet carrier is connected to the second ring gear to form a first connecting member; And / or, the second planet carrier is connected to the first ring gear to form a second connecting member.

5. The hybrid power system according to claim 4, characterized in that: The first connecting member and the second connecting member are both integral members.

6. The hybrid power system according to claim 4, characterized in that: The first connecting member is located at an inner side of the second connecting member.

7. The hybrid power system according to claim 1, characterized in that: It also includes: A one-way locking mechanism is cooperated with the engine output shaft, and the one-way locking mechanism only allows the engine output shaft to rotate in one direction of a clockwise direction or a counterclockwise direction.

8. A vehicle, characterized in that: Comprising a hybrid power system according to any one of claims 1-7.

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