Hybrid power system and vehicle

Abstract

The utility model belongs to the technical field of vehicles, and provides a hybrid power system and a vehicle. The hybrid power system comprises a driving motor, an engine and a transmission. The transmission comprises a planetary gear train, a first combination switch, a second combination switch, a third combination switch and a transmission set. The planetary gear train comprises a gear ring, a sun gear, a planet gear and a planet carrier; a first input shaft of the engine is connected with a sun gear which is connected with a planet gear, and the planet gear is connected with a gear ring and a planet carrier. The first input shaft of the engine is further connected with the planet carrier through a first combination switch. A second input shaft of the driving motor is connected with the gear ring and is connected with the transmission group through a second combination switch; the planet carrier is connected with the transmission set through a third combination switch. The transmission set is connected with the output shaft. According to the E-CVT, large-torque power output of the E-CVT can be achieved, and therefore the dynamic property of a vehicle is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicles, and more specifically, relates to a hybrid power system and a vehicle. Background Art

[0002] In the context of energy conservation and environmental protection, hybrid vehicles have the characteristics of both fuel vehicles and electric vehicles, and have huge advantages in fuel economy, power, carbon reduction and environmental protection.

[0003] Hybrid vehicles usually switch power modes through transmissions. Currently, there are many types of transmissions, but the common E-CVT (Electric-Continuously Variable Transmission) structure is prone to power shortage during operation due to power diversion. Utility Model Content

[0004] In view of this, the utility model provides a hybrid power system and a vehicle, aiming to achieve high torque power output of E-CVT, thereby improving the power of the vehicle.

[0005] In a first aspect, an embodiment of the utility model provides a hybrid power system, including: a drive motor, an engine and a transmission; the transmission includes a planetary gear train, a first combination switch, a second combination switch, a third combination switch and a transmission group; the planetary gear train includes a ring gear, a sun gear, planetary gears and a planet carrier;

[0006] The first input shaft of the engine is connected to the sun gear, the sun gear is connected to the planetary gear, the planetary gear is connected to the ring gear and the planetary carrier; the first input shaft of the engine is also connected to the planetary carrier through a first combination switch;

[0007] The second input shaft of the driving motor is connected to the ring gear and is connected to the transmission group through a second combination switch;

[0008] The planet carrier is connected to the transmission group through the third combination switch;

[0009] The transmission group is connected to the output shaft.

[0010] In combination with the first aspect, in a possible implementation of the first aspect, the transmission further includes a fourth combination switch and a housing, and the planetary gear train, the first combination switch, the second combination switch, the third combination switch and the transmission group are all arranged in the housing;

[0011] The planet carrier is also connected to the casing via a fourth combination switch.

[0012] In combination with the first aspect, in a possible implementation of the first aspect, the transmission further includes a first reduction gear set;

[0013] The second input shaft of the driving motor is connected to the ring gear through the first reduction gear set.

[0014] In combination with the first aspect, in a possible implementation of the first aspect, the transmission further includes an intermediate gear;

[0015] The second input shaft of the driving motor is also connected to the intermediate gear through the first reduction gear set, and the intermediate gear is connected to the transmission set through the second combination switch.

[0016] In combination with the first aspect, in a possible implementation of the first aspect, the first reduction gear set includes a first driving wheel and a first driven wheel;

[0017] The second input shaft of the driving motor is connected to the first driving wheel, the first driving wheel is connected to the first driven wheel, and the first driven wheel is connected to the ring gear and the intermediate gear.

[0018] In combination with the first aspect, in a possible implementation of the first aspect, the transmission further includes a second reduction gear set;

[0019] The planet carrier is connected to the second reduction gear set, and the second reduction gear set is connected to the transmission set via the third combination switch.

[0020] In combination with the first aspect, in a possible implementation of the first aspect, the second reduction gear set includes a second driving wheel and a second driven wheel;

[0021] The planet carrier is connected to the second driving wheel, the second driving wheel is connected to the second driven wheel, and the second driven wheel is connected to the transmission group through the third combination switch.

[0022] In combination with the first aspect, in a possible implementation of the first aspect, the transmission group includes an intermediate transmission shaft, a third reduction gear group, and a differential;

[0023] The second input shaft of the driving motor is connected to the intermediate transmission shaft through the second combination switch, and the planet carrier is connected to the intermediate transmission shaft through the third combination switch;

[0024] The intermediate transmission shaft is connected to the third reduction gear set;

[0025] The third reduction gear set is connected to the output shaft through a differential.

[0026] In combination with the first aspect, in a possible implementation of the first aspect, the third reduction gear set includes a third driving wheel and a third driven wheel;

[0027] The intermediate transmission shaft is connected to the third driving wheel, the third driving wheel is connected to the third driven wheel, and the third driven wheel is connected to the output shaft through a differential.

[0028] In a second aspect, an embodiment of the utility model provides a vehicle, comprising a hybrid power system as described in the first aspect or any one of the implementations of the first aspect.

[0029] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0030] In the embodiment of the utility model, the third combination switch is engaged, the first combination switch and the second combination switch are disconnected, and the power of the engine and the drive motor is output through the planetary gear train to achieve stepless power fusion, so as to achieve forward movement in the E-CVT hybrid mode, provide high torque power output, and improve the power of the vehicle. In addition, through the cooperation of the first combination switch, the second combination switch and the third combination switch, the transmission can also realize the free switching of multiple gears in the pure electric mode, the engine direct drive mode, and the extended range mode, so as to meet the power requirements in different modes, and the transmission structure is simple and suitable for practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the structure of a hybrid power system provided by an embodiment of the utility model Figure 1 ;

[0032] Figure 2 A schematic diagram of the structure of a hybrid power system provided by an embodiment of the utility model Figure 2 ;

[0033] Figure 3 A schematic diagram of the structure of a hybrid power system provided by an embodiment of the utility model Figure 3 ;

[0034] Figure 4 A schematic diagram of the structure of a hybrid power system provided by an embodiment of the utility model Figure 4 ;

[0035] Explanation of the accompanying drawings: driving motor 1; second input shaft 2; first reduction gear set 3; planetary gear train 4; first input shaft 5; engine 6; second reduction gear set 7; intermediate gear 8; intermediate transmission shaft 9; third reduction gear set 10; output shaft 11; differential 12; transmission gear 13; first combining switch S1; second combining switch S2; third combining switch S3; fourth combining switch S4; clutch C1; first driving wheel 31; first driven wheel 32; ring gear 41; planetary gear 42; planetary carrier 43; sun gear 44; second driving wheel 71; second driven wheel 72; third driving wheel 101; third driven wheel 102. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] The transmission is one of the core components of a car. Its function is to adjust the speed ratio between the engine and the wheels according to the driving state of the vehicle to achieve the best power output and fuel economy. Traditional transmissions include manual transmissions, automatic transmissions, dual-clutch transmissions, etc. They all have their own advantages and disadvantages, but they also have some common problems, such as complex structures, high costs, easily worn parts, and obvious gear shifting frustrations.

[0038] E-CVT is a technology that uses electric motors and planetary gear sets to achieve continuously variable speeds. It does not have components such as clutches, torque converters or gear shafts in traditional transmissions. Instead, it uses a sophisticated electronic control system to control the power distribution and coordination between the motor and the engine to achieve optimal driving performance and energy saving. However, in the E-CVT hybrid mode, due to power diversion, the vehicle is prone to insufficient power.

[0039] In order to solve the problem, an embodiment of the utility model provides a high-efficiency four-wheel drive hybrid architecture including a planetary gear train and capable of outputting a larger torque under different connection modes.

[0040] See also Figures 1 to 4 Any one of the embodiments of the present invention, the hybrid power system provided by the embodiment of the present invention comprises:

[0041] Driving motor 1, engine 6, planetary gear train 4, first combination switch S1, second combination switch S2, third combination switch S3 and transmission group.

[0042] The planetary gear train 4 includes a ring gear 41 , planetary gears 42 , a sun gear 44 and a planet carrier 43 .

[0043] The first input shaft 5 of the engine 6 is connected to the sun gear 44, the sun gear 44 is connected to the planetary gear 42, and the planetary gear 42 is connected to the ring gear 41 and the planetary carrier 43. The first input shaft 5 of the engine 6 is also connected to the planetary carrier 43 through the first combination switch S1. The second input shaft 2 of the drive motor 1 is connected to the ring gear 41, and is connected to the transmission group through the second combination switch S2. The planetary carrier 43 is connected to the transmission group through the third combination switch S3. The transmission group is connected to the output shaft 11. Here, the first combination switch S1, the second combination switch S2 and the third combination switch S3 are switches with an engagement function, that is, switches with an engagement or disconnection function.

[0044] In the embodiment of the utility model, the third combination switch is engaged, the first combination switch and the second combination switch are disconnected, and the power of the engine and the drive motor is output to the planetary carrier through the planetary gear train to achieve stepless power fusion, so as to achieve forward movement in the E-CVT hybrid mode, provide high torque power output, and improve the power of the vehicle. In addition, through the cooperation of the first combination switch, the second combination switch and the third combination switch, the transmission can also realize the free switching of multiple gears in the pure electric mode, the engine direct drive mode, and the extended range mode, so as to meet the power requirements in different modes, and the transmission structure is simple and suitable for practical applications.

[0045] Optionally, in this embodiment, the transmission further includes a casing, and components such as the planetary gear train 4, the first combination switch S1, the second combination switch S2, the third combination switch S3 and the transmission group are all arranged in the casing.

[0046] Optionally, in order to achieve reverse gear in the engine direct drive mode, the transmission also includes a fourth combination switch S4, and the planetary carrier 43 is also connected to the casing through the fourth combination switch S4, so that when reverse gear is achieved in the engine direct drive mode, the planetary carrier 43 is fixed to the casing by engaging the fourth combination switch S4.

[0047] Optionally, the transmission also includes a first reduction gear set 3. The second input shaft 2 of the drive motor 1 is connected to the ring gear 41 through the first reduction gear set 3. The transmission also includes an intermediate gear 8, and the second input shaft 2 of the drive motor 1 is also connected to the intermediate gear 8 through the first reduction gear set 3, and the intermediate gear 8 is connected to the transmission group through the second combination switch S2. That is, after the power of the drive motor 1 is decelerated by the first reduction gear set, it can be transmitted to the planetary gear train 4, and then transmitted to the output shaft 11 by the planetary gear train 4; it can also be directly transmitted to the transmission group through the intermediate gear 8 and the second combination switch S2, and finally transmitted to the output shaft 11.

[0048] For example, Figure 1 Taking the embodiment as an example, the detailed structure and working principle of the hybrid transmission are introduced.

[0049] Optionally, in this embodiment, the first reduction gear group 3 includes a first driving wheel 31 and a first driven wheel 32; the second input shaft 2 of the drive motor 1 is connected to the first driving wheel 31, the first driving wheel 31 is connected to the first driven wheel 32, and the first driven wheel 32 is connected to the ring gear 41 and the intermediate gear 8.

[0050] Here, the first driving wheel 31 is coaxially mounted on the second input shaft 2, the first driving wheel 31 meshes with the first driven wheel 32, driving the first driven wheel 32 to rotate, and the first driven wheel 32 is coaxially connected to the ring gear 41 on the planetary gear train 4, driving the ring gear 41 to rotate. The first driven wheel 32 is also meshed with the intermediate gear 8. The first input shaft 2 of the driving motor 1 transmits power to the planetary gear train 4 through the first reduction gear set 3, and the power of the engine 6 is transmitted to the planetary gear train 4. The first input shaft 5 of the engine 6 is directly connected to the sun gear 44, and the first input shaft 5 of the engine 6 is also connected to the planetary carrier 43 of the planetary gear train through the first combination switch S1, and the first input shaft 5 is disconnected / engaged by S1 to achieve the disconnection / engagement of the first input shaft 5 and the planetary carrier 43. When S3 is engaged and S1, S2, and S4 are disconnected, the power of the driving motor 1 and the engine 6 is output through the planetary carrier 43 after realizing stepless power fusion through the planetary gear train 4, and then transmitted to the output shaft 11 through the transmission group.

[0051] In a feasible embodiment, the transmission further comprises a second reduction gear set 7. The planet carrier 43 is connected to the second reduction gear set 7, and the second reduction gear set 7 is connected to the transmission group via the third combination switch S3.

[0052] The second reduction gear set may include a second driving wheel 71 and a second driven wheel 72. The second driving wheel 71 is coaxially mounted on the planet carrier 43, the second driving wheel 71 is meshed with the second driven wheel 72, and the second driven wheel 72 is connected to the transmission set through the third combination switch S3. The transmission set may include an intermediate transmission shaft 9, a third reduction gear set 10 and a differential 12, the second input shaft 2 of the drive motor 1 is connected to the intermediate transmission shaft 9 through the second combination switch S2, and the planetary gear 43 is connected to the intermediate transmission shaft 9 through the third combination switch S3. The intermediate transmission shaft 9 is connected to the third reduction gear set 10, where the third reduction gear set 10 includes a third driving wheel 101 and a third driven wheel 102, the intermediate transmission shaft 9 is connected to the third driving wheel 101, the third driving wheel 101 is connected to the third driven wheel 102, and the third driven wheel 102 is connected to the output shaft 11 through the differential 12.

[0053] Through the above structure, free switching among pure electric mode, engine direct drive mode, E-CVT hybrid mode and boost mode can be realized as follows:

[0054] Table 1 Working mode shift logic table

[0055]

[0056]

[0057] (1) Pure electric mode

[0058] S2 is engaged, S1, S3, and S4 are disconnected, and forward and reverse travel in pure electric mode can be achieved. The drive motor 1 drives the intermediate gear 8 to rotate through the first reduction gear set 3, and then drives the intermediate transmission shaft 9 to rotate, and transmits power to the output shaft 11 through the third reduction gear set 10. By rotating the drive motor 1 forward and reverse, forward and reverse travel in pure electric mode can be achieved.

[0059] The power transmission route is as follows: driving motor 1 → first reduction gear set 3 → intermediate gear 8 → intermediate transmission shaft 9 → third reduction gear set 10 → output shaft 11 .

[0060] (2) Engine direct drive mode

[0061] Forward gear: S1 is engaged, S4 is disengaged. The two gears in the forward mode under the fuel mode can be switched by engaging S2 or S3. The power transmission path 1 of the engine 6 is transmitted to the output shaft 11 by the first driven wheel 32 through the planetary gear train 4 and the output of the ring gear 41. The power transmission path 2 is transmitted to the output shaft 11 through the planetary carrier 43 and the second reduction gear set 7. S2 realizes the engagement / disengagement of the intermediate gear 8 and the intermediate transmission shaft 9, and S3 realizes the engagement / disengagement of the second driven wheel 72 and the intermediate transmission shaft 9. The switching of different gears is realized by the engagement of S2 or S3, thereby realizing the two-gear adjustment of the engine direct drive forward mode.

[0062] The power transmission route is as follows:

[0063] Gear position 1 (S2 engaged), engine 6 → ring gear 41 → first driven wheel 32 → intermediate gear 8 → intermediate transmission shaft 9 → third reduction gear set 10 → output shaft 11.

[0064] Gear position 2 (S3 engaged), engine 6 → planetary carrier 43 → second reduction gear set 7 → intermediate transmission shaft 9 → third reduction gear set 10 → output shaft 11.

[0065] Reverse gear: S2 and S4 are engaged, S1 and S3 are disconnected, and reverse gear can be achieved in the engine direct drive mode. The planet carrier 43 is fixed on the casing, and the power of the engine 6 is input through the sun gear 44, output by the ring gear 41, and transmitted to the output shaft 11 through the first driven wheel 32, the intermediate gear 8, the intermediate transmission shaft 9, and the third reduction group 10, so as to achieve reverse gear in the engine direct drive mode.

[0066] The power transmission route is as follows: engine 6 → sun gear 44 → ring gear 41 → first driven gear 32 → intermediate gear 8 → intermediate transmission shaft 9 → third reduction gear set 10 → output shaft 11 .

[0067] (3) E-CVT hybrid mode

[0068] S3 is engaged, S1, S2, and S4 are disconnected, and normal driving in the E-CVT hybrid mode can be achieved. The power output of the engine 6 acts on the sun gear 44, and the power output of the drive motor 1 acts on the ring gear 41 through the first reduction gear set 3. The power of the engine 6 and the drive motor 1 is output to the planetary carrier 43 through the planetary gear train 4 to achieve stepless power fusion, and then the power is transmitted to the output shaft 11 after two-stage reduction through the second reduction gear set 7 and the third reduction gear set 10, so as to achieve forward movement in the E-CVT hybrid mode.

[0069] The power transmission route is as follows:

[0070] Engine 6 , drive motor 1 → planetary gear train 4 → second reduction gear set 7 → intermediate transmission shaft 9 → third reduction gear set 10 → output shaft 11 .

[0071] (4) Extended range mode

[0072] S1 is engaged, and S1, S2, and S3 are disconnected, so that the range extension mode can be realized. The power of the engine 6 is transmitted to the ring gear 41 through the planetary carrier 43, and then transmitted to the drive motor 1 through the first reduction gear set 3 for charging.

[0073] The power transmission route is as follows:

[0074] Engine 6 →planet carrier 43 →ring gear 41 →first reduction gear set 3 →drive motor 1 .

[0075] It can be seen that the hybrid transmission of this embodiment can realize free switching of multiple power modes such as pure electric, engine direct drive, E-CVT hybrid, and extended range. It has a simple structure and is easy to implement. It can still provide high-torque power output under medium and low-speed driving conditions of E-CVT hybrid mode and engine direct drive reverse mode, and can easily achieve scenarios such as getting out of muddy roads and climbing hills, and is suitable for various types of vehicles.

[0076] Based on the above design concept, components such as the reduction gear set, the transmission set, and the combination switch can also be implemented in different structural ways.

[0077] For example, Figure 2 In the embodiment shown, the ring gear 41 can be of a type having both internal and external teeth. The first driving wheel 31 of the first reduction gear set 3 is directly meshed with the external teeth of the ring gear 41, and the first driven wheel 32 is coaxially connected to the ring gear 41. The power transmission process is consistent with the above embodiment.

[0078] Or, if Figure 3 In the illustrated embodiment, the intermediate gear 8 is not directly meshed with the first driven wheel 32, but a transfer gear 13 is added. The transfer gear 13 is coaxially connected to the ring gear 41, and the intermediate gear 8 meshes with the transfer gear 13 to achieve indirect transmission of power.

[0079] Or, if Figure 4 In the illustrated embodiment, the first engagement switch S1 is changed to be controlled by the clutch C1 , which can also realize the engagement / disengagement of the second input shaft 5 and the planetary carrier 43 .

[0080] It is understandable that in the design concept of the present application, similar simple structural changes can be implemented according to actual needs, and within the protection scope of the present application, the present application will not list them one by one.

[0081] The embodiment of the utility model proposes a four-wheel drive hybrid architecture with front and rear axles. The front axle is composed of an engine, a drive motor, a planetary gear train and a reduction gear set. It can provide a large torque power output by changing the connection method between the power source and the planetary gear train, and realize a large torque output in the E-CVT hybrid and engine direct drive reverse gear power modes. The rear electric drive axle is equipped to realize the four-wheel drive mode. It has pure electric, engine direct drive, E-CVT hybrid, and extended range multi-mode free switching, and can be widely used in passenger car models.

[0082] An embodiment of the utility model further provides a vehicle, comprising the hybrid power system as described above.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hybrid power system, characterized in that: include: A drive motor, an engine and a transmission; the transmission comprises a planetary gear train, a first combination switch, a second combination switch, a third combination switch and a transmission group; the planetary gear train comprises a ring gear, a sun gear, planetary gears and a planet carrier; The first input shaft of the engine is connected to the sun gear, the sun gear is connected to the planetary gear, the planetary gear is connected to the ring gear and the planetary carrier; the first input shaft of the engine is also connected to the planetary carrier through the first combination switch; The second input shaft of the driving motor is connected to the ring gear, and is connected to the transmission group through the second combination switch; The planet carrier is connected to the transmission group via the third combination switch; The transmission group is connected to the output shaft.

2. The hybrid power system according to claim 1, characterized in that: The transmission further comprises: a fourth combination switch and a housing, wherein the planetary gear train, the first combination switch, the second combination switch, the third combination switch and the transmission group are all arranged in the housing; The planet carrier is also connected to the casing via the fourth combining switch.

3. The hybrid power system according to claim 1, characterized in that: The transmission also includes: a first reduction gear set; The second input shaft of the driving motor is connected to the ring gear through the first reduction gear set.

4. The hybrid power system according to claim 3, characterized in that: The transmission also includes: an intermediate gear; The second input shaft of the driving motor is also connected to the intermediate gear through the first reduction gear set, and the intermediate gear is connected to the transmission set through the second combining switch.

5. The hybrid power system according to claim 4, characterized in that: The first reduction gear set includes a first driving wheel and a first driven wheel; The second input shaft of the driving motor is connected to the first driving wheel, the first driving wheel is connected to the first driven wheel, and the first driven wheel is connected to the ring gear and the intermediate gear.

6. The hybrid power system according to claim 1, characterized in that: The transmission also includes: a second reduction gear set; The planet carrier is connected to the second reduction gear set, and the second reduction gear set is connected to the transmission set via the third combination switch.

7. The hybrid power system according to claim 6, characterized in that: The second reduction gear set includes a second driving wheel and a second driven wheel; The planet carrier is connected to the second driving wheel, the second driving wheel is connected to the second driven wheel, and the second driven wheel is connected to the transmission group through the third combination switch.

8. The hybrid power system according to claim 1, characterized in that: The transmission group includes an intermediate transmission shaft, a third reduction gear group and a differential; The second input shaft of the driving motor is connected to the intermediate transmission shaft through the second combination switch, and the planet carrier is connected to the intermediate transmission shaft through the third combination switch; The intermediate transmission shaft is connected to the third reduction gear set; The third reduction gear set is connected to the output shaft through the differential.

9. The hybrid power system according to claim 8, characterized in that: The third reduction gear set includes a third driving wheel and a third driven wheel; The intermediate transmission shaft is connected to the third driving wheel, the third driving wheel is connected to the third driven wheel, and the third driven wheel is connected to the output shaft through the differential.

10. A vehicle, characterized in that: Comprising a hybrid power system as claimed in any one of claims 1 to 9.

Images