Powertrain and vehicle of a hybrid vehicle

Abstract

The present disclosure relates to the technical field of hybrid vehicles, and particularly to a powertrain and a vehicle of a hybrid vehicle. The powertrain of the hybrid vehicle includes a power output mechanism and a speed change mechanism; the speed change mechanism includes a speed change mechanism output shaft, a third planetary gear set, and a shift component; the power output mechanism includes a first drive component and a second drive component; the ring gear of the third planetary gear set is connected to the transmission housing, the carrier of the third planetary gear set is connected to the speed change mechanism output shaft, and the input shaft of the speed change mechanism is respectively connected to the sun gear and the carrier of the third planetary gear set through the shift component. For the powertrain of the hybrid vehicle, by directly connecting the ring gear of the first planetary gear set to the output shaft, it can not only simplify the gear positions under the condition of the engine driving the vehicle, but also will not affect its cooperation with the second motor to form a series-parallel gear position. Moreover, since the engine does not perform the speed reduction and torque increase action of the third planetary gear set, it can stably provide a relatively high speed for the output shaft.

Description

Technical Field

[0001] The present disclosure relates to the technical field of hybrid electric vehicles, and particularly to a powertrain and a vehicle of a hybrid electric vehicle. Background Art

[0002] Due to the pressure of energy and environmental protection and technical limitations, hybrid electric vehicles are increasingly favored by consumers and manufacturers. As a transitional solution towards pure electric vehicles, hybrid electric vehicles have the advantages of both traditional vehicles and pure electric vehicles, and are currently very practical new energy vehicles.

[0003] The powertrain of a hybrid electric vehicle generally combines an engine, a first motor, and a second motor with a planetary gear mechanism, and supplies the power of the engine, the first motor, and the second motor to the drive shaft of the vehicle, so as to realize driving the vehicle with hybrid power. The planetary gear mechanism has a compact structure, high transmission efficiency, and a large transmission ratio, and is easy to realize the synthesis and distribution of power, and is very suitable for use as a power coupling device of a hybrid electric vehicle.

[0004] Currently, in the powertrain of a hybrid electric vehicle, the output power of the engine and the output power of the second motor are often superimposed first and then output to the output shaft of the powertrain through a planetary gear set. Although such a setting can play a role in reducing speed and increasing torque, the structure of the entire powertrain is too complex, especially the shifting operation is relatively complex, resulting in a relatively high cost of the entire powertrain. Summary of the Invention

[0005] In order to solve the above technical problems, the present disclosure provides a powertrain and a vehicle of a hybrid electric vehicle.

[0006] In a first aspect, the present disclosure provides a powertrain of a hybrid electric vehicle, including: a power output mechanism and a speed change mechanism;

[0007] The speed change mechanism includes a speed change mechanism output shaft, a third planetary gear set, and a shifting assembly;

[0008] The power output mechanism includes a first driving assembly and a second driving assembly;

[0009] The ring gear of the third planetary gear set is connected to the transmission housing, the planet carrier of the third planetary gear set is connected to the speed change mechanism output shaft, and the input shaft of the speed change mechanism is respectively connected to the sun gear and the planet carrier of the third planetary gear set through the shifting assembly;

[0010] The first driving assembly is connected to the speed change mechanism output shaft, and the second driving assembly is connected to the input shaft of the speed change mechanism.

[0011] Optionally, the first driving assembly includes an engine, a first motor, and a first planetary gear set, and the second driving assembly includes a second motor;

[0012] A transmission shaft of the engine is connected to a planet carrier of the first planetary gear set, a transmission shaft of the first motor is connected to a sun gear of the first planetary gear set, and a ring gear of the first planetary gear set is connected to an output shaft of the transmission mechanism;

[0013] A transmission shaft of the second motor is connected to an input shaft of the transmission mechanism.

[0014] Optionally, the first driving assembly includes an engine, a first motor, a first planetary gear set, and a C0 clutch, and the second driving assembly includes a second motor;

[0015] A transmission shaft of the engine is connected to a planet carrier of the first planetary gear set, the transmission shaft of the engine is connected to an output shaft of the transmission mechanism through the C0 clutch, a transmission shaft of the first motor is connected to a sun gear of the first planetary gear set, and a ring gear of the first planetary gear set is connected to a transmission housing;

[0016] A transmission shaft of the second motor is connected to an input shaft of the transmission mechanism.

[0017] Optionally, the second driving assembly further includes a second planetary gear set, a sun gear of the second planetary gear set is connected to a transmission shaft of the second motor, a ring gear of the second planetary gear set is connected to the transmission housing, and a planet carrier of the second planetary gear set is connected to an input shaft of the transmission mechanism.

[0018] Optionally, a one-way clutch is provided between a transmission shaft of the engine and a planet carrier of the first planetary gear set.

[0019] Optionally, the shifting assembly is a synchronizer, a synchronizer body is connected to the second driving assembly, and two sides of the synchronizer are respectively connected to a sun gear and a planet carrier of a third planetary gear set.

[0020] Optionally, the shifting assembly includes a C1 clutch and a C2 clutch, the C1 clutch is used for connecting the second driving assembly and the sun gear of the third planetary gear set, and the C2 clutch is used for connecting the second driving assembly and the planet carrier of the third planetary gear set.

[0021] In a second aspect, the present disclosure provides a vehicle, including the powertrain as described above.

[0022] The technical solutions provided by the embodiments of the present disclosure have the following advantages compared with the prior art:

[0023] The powertrain of the hybrid vehicle provided by the present disclosure, by directly connecting the ring gear of the first planetary gear set to the output shaft of the transmission mechanism, can not only simplify the gear positions under the condition of the engine driving the vehicle, but also does not affect its combination with the second motor to form a series-parallel gear position. Moreover, since the engine does not go through the speed reduction and torque increase action of the third planetary gear set, it can stably provide a relatively high speed for the output shaft. At this time, the second motor only needs to output a reduced speed. Therefore, a low-speed motor can be selected as the second motor to reduce costs. By setting the third planetary gear set, when the vehicle is traveling at a low speed, the ring gear of the third planetary gear set fixed by the transmission housing and the sun gear driven by the second motor can be utilized to achieve the effect of providing a greater torque for the planet carrier of the third planetary gear set, thereby providing a greater torque for the vehicle when traveling at a low speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 FIG. [X] is a schematic structural diagram of the powertrain of the hybrid vehicle according to an embodiment of the present disclosure;

[0027] Figure 2 FIG. [X] is a schematic structural diagram of the powertrain of the hybrid vehicle according to a second embodiment of the present disclosure;

[0028] Figure 3 FIG. [X] is a schematic structural diagram of the powertrain of the hybrid vehicle according to a third embodiment of the present disclosure;

[0029] Figure 4 FIG. [X] is a schematic structural diagram of the powertrain of the hybrid vehicle according to an embodiment of the present disclosure provided with a one-way clutch;

[0030] Figure 5 FIG. [X] is a shift logic diagram of the powertrain of the hybrid vehicle according to an embodiment of the present disclosure.

[0031] Wherein, 11, engine; 12, first motor; 13, second motor; 21, first planetary gear set; 22, second planetary gear set; 23, third planetary gear set; 3, shift component; 31, C1 clutch; 32, C2 clutch; 4, transmission housing; 5, one-way clutch; 6, C0 clutch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] In order to more clearly understand the above-mentioned objects, features, and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments may be combined with each other.

[0033] In the following description, many specific details are set forth to facilitate a thorough understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all of the embodiments.

[0034] Due to the pressure of energy and environmental protection as well as technological limitations, hybrid electric vehicles are increasingly favored by consumers and manufacturers. As a transitional solution towards pure electric vehicles, hybrid electric vehicles combine the advantages of traditional vehicles and pure electric vehicles, and are currently very practical new energy vehicles.

[0035] The powertrain of a hybrid electric vehicle generally uses a planetary gear mechanism to combine an engine, a first motor, and a second motor, and provides the power of the engine, the first motor, and the second motor to the drive shaft of the vehicle, so as to realize driving the vehicle in a hybrid power mode. The planetary gear mechanism has a compact structure, high transmission efficiency, and a large transmission ratio, and is easy to realize the synthesis and distribution of power, and is very suitable for use as a power coupling device for hybrid electric vehicles.

[0036] Currently, in the powertrain of a hybrid electric vehicle, the output power of the engine and the output power of the second motor are often superimposed first and then output to the output shaft of the powertrain through a planetary gear set. Although such a setting can play a role in reducing speed and increasing torque, the structure of the entire powertrain is too complex, especially the shifting operation is relatively complex, resulting in a relatively high cost of the entire powertrain.

[0037] Based on this, the present embodiment provides a powertrain of a hybrid electric vehicle and a hybrid electric vehicle. By directly connecting the ring gear of the first planetary gear set to the output shaft of the transmission mechanism, not only can the gears in the working condition of the engine driving the vehicle be simplified, but it will not affect its combination with the second motor to form a series-parallel gear. Moreover, since the engine does not go through the action of reducing speed and increasing torque of the third planetary gear set, it can stably provide a relatively high rotational speed for the output shaft. At this time, the second motor only needs to output a reduced rotational speed. Therefore, a low-speed motor can be selected as the second motor to reduce costs; through the setting of the third planetary gear set, when the vehicle is driving at a low speed, the ring gear of the third planetary gear set fixed by the transmission housing and the sun gear driven by the second motor can be utilized to achieve the effect of providing a greater torque for the planet carrier of the third planetary gear set, thereby providing a greater torque for the vehicle when driving at a low speed. The following will be described in detail through specific embodiments:

[0038] Refer toFigures 1 to 5 As shown in the figure, the powertrain of a hybrid vehicle provided in this embodiment includes a power output mechanism and a speed change mechanism; the speed change mechanism includes a speed change mechanism output shaft, a third planetary gear set 23, and a shift component 3; the power output mechanism includes a first drive component and a second drive component; the ring gear of the third planetary gear set 23 is connected to the transmission housing 4, the planet carrier of the third planetary gear set 23 is connected to the speed change mechanism output shaft, and the speed change mechanism input shaft is respectively connected to the sun gear and the planet carrier of the third planetary gear set 23 through the shift component 3; the first drive component is connected to the speed change mechanism output shaft, and the second drive component is connected to the speed change mechanism input shaft.

[0039] Among them, by directly connecting the ring gear of the first planetary gear set 21 to the speed change mechanism output shaft, not only can the gears in the working condition of the engine 11 driving the vehicle be simplified, but it will not affect its combination with the second motor 13 to form a series-parallel gear. Moreover, since the engine 11 does not go through the speed reduction and torque increase action of the third planetary gear set 23, it can stably provide a relatively high speed for the output shaft. At this time, the second motor 13 only needs to output a reduced speed. Therefore, a low-speed motor can be selected as the second motor 13 to reduce costs; through the setting of the third planetary gear set 23, when the vehicle is driving at a low speed, the ring gear of the third planetary gear set 23 fixed by the transmission housing 4 and the sun gear driven by the second motor 13 can be used to achieve the effect of providing a greater torque for the planet carrier of the third planetary gear set 23, so as to provide a greater torque for the vehicle when driving at a low speed.

[0040] Continue to refer to Figure 1 As shown in the figure, the first drive component includes an engine 11, a first motor 12, and a first planetary gear set 21, and the second drive component includes a second motor 13; the transmission shaft of the engine 11 is connected to the planet carrier of the first planetary gear set 21, the transmission shaft of the first motor 12 is connected to the sun gear of the first planetary gear set 21, and the ring gear of the first planetary gear set 21 is connected to the speed change mechanism output shaft; the transmission shaft of the second motor 13 is connected to the speed change mechanism input shaft; such a setting can, when the power output mechanism is working, complete the speed regulation work for the engine 11 through the first motor 12, so that the engine 11 can always maintain within the economic speed range during operation, improving the economy of the vehicle.

[0041] Continue to refer to Figure 2As shown, the first drive assembly includes an engine 11, a first motor 12, a first planetary gear set 21, and a C0 clutch 6. The second drive assembly includes a second motor 13. The transmission shaft of the engine 11 is connected to the planet carrier of the first planetary gear set 21. The transmission shaft of the engine 11 is connected to the output shaft of the transmission mechanism through the C0 clutch 6. The transmission shaft of the first motor 12 is connected to the sun gear of the first planetary gear set 21. The ring gear of the first planetary gear set 21 is connected to the transmission housing 4. The transmission shaft of the second motor 13 is connected to the input shaft of the transmission mechanism. By setting the C0 clutch 6, when the second motor 13 works alone, the power transmission paths of the engine 11 and the first motor 12 can be disconnected, thereby reducing the control difficulty of the engine 11 and the first motor 12, making it easier to realize the action of the second motor 13 reversing to drive the vehicle in reverse, and significantly reducing the cost of the entire power assembly.

[0042] Continue to refer to Figure 1 , Figure 2 and Figure 3 As shown, the second drive assembly further includes a second planetary gear set 22. The sun gear of the second planetary gear set 22 is connected to the transmission shaft of the second motor 13. The ring gear of the second planetary gear set 22 is connected to the transmission housing 4. The planet carrier of the second planetary gear set 22 is connected to the input shaft of the transmission mechanism. By setting the second planetary gear set 22, the connection between the ring gear of the second planetary gear set 22 and the transmission housing 4, and the connection between the transmission shaft of the second motor 13 and the sun gear of the second planetary gear set 22 can be used to provide a speed reduction and torque increase effect for the second motor 13 during operation. At the same time, it can also cooperate with the setting of the third planetary gear set 23 to achieve a double torque increase effect. Subsequently, the setting method of this power assembly can be used to select a second motor 13 with a smaller torque, thereby further reducing the cost of the entire vehicle and also reducing the occupied space of this power assembly.

[0043] Continue to refer to Figure 4 As shown, a one-way clutch 5 is provided between the transmission shaft of the engine 11 and the planet carrier of the first planetary gear set 21. By setting the one-way clutch 5, the engine 11 can be prevented from reversing when the second motor 13 works, thereby preventing the engine 11 from being worn due to idling, and at the same time reducing the noise level of the entire vehicle.

[0044] Continue to refer to Figure 3 As shown, the shifting assembly 3 is a synchronizer. The synchronizer body is connected to the second drive assembly. The two sides of the synchronizer are respectively connected to the sun gear and the planet carrier of the third planetary gear set 23. When using the synchronizer as the shifting assembly 3, there is no need to set a dedicated hydraulic system in the transmission housing 4, which can effectively reduce costs and the control mode is also simpler, significantly improving the economy and practicality of this power assembly.

[0045] In a further embodiment, the shifting assembly 3 includes a C1 clutch 31 and a C2 clutch 32. The C1 clutch 31 is used to connect the second driving assembly and the sun gear of the third planetary gear set 23, and the C2 clutch 32 is used to connect the second driving assembly and the planet carrier of the third planetary gear set 23. When the C1 clutch 31 and the C2 clutch 32 are used as the shifting assembly 3, the shifting operation can be achieved more accurately and quickly, significantly improving the shifting efficiency and the reliability of gear holding.

[0046] The first motor 12 and the first planetary gear set 21 can drive the engine 11 to start.

[0047] Continue to refer to Figures 1 to 5 as shown, wherein, Figure 5 the shifting element in is switched to the first gear state, that is, the sun gear of the third planetary gear set 23 is connected to the planet carrier of the second planetary gear set 22; Figure 5 the shifting element in is switched to the second gear state, that is, the planet carrier of the third planetary gear set 23 is connected to the planet carrier of the second planetary gear set 22; When the shifting assembly 3 is the C1 clutch 31 and the C2 clutch 32, the shifting assembly 3 is switched to the first gear state, that is, the C1 clutch 31 is in the engaged state, and the shifting assembly 3 is switched to the second gear state, that is, the C2 clutch 32 is in the engaged state.

[0048] In a second aspect, the present disclosure provides a hybrid vehicle including the powertrain as described above.

[0049] The specific implementation manner and implementation principle are the same as those of the above embodiments, and can bring the same or similar technical effects, which will not be elaborated herein one by one. Specifically, reference can be made to the description of the powertrain embodiment of the above hybrid vehicle.

[0050] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0051] The above are only specific embodiments of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments described herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A powertrain of a hybrid vehicle, characterized in that, Comprising: A power output mechanism and a speed change mechanism; The speed change mechanism includes a speed change mechanism output shaft, a third planetary gear set (23) and a shift component (3); The power output mechanism includes a first drive component and a second drive component; The ring gear of the third planetary gear set (23) is connected to the transmission housing (4), the planet carrier of the third planetary gear set (23) is connected to the speed change mechanism output shaft, and the speed change mechanism input shaft is respectively connected to the sun gear and the planet carrier of the third planetary gear set (23) through the shift component (3); The first drive component is connected to the speed change mechanism output shaft, and the second drive component is connected to the speed change mechanism input shaft; The first drive component includes an engine (11), a first motor (12) and a first planetary gear set (21), and the second drive component includes a second motor (13); The transmission shaft of the engine (11) is connected to the planet carrier of the first planetary gear set (21), the transmission shaft of the first motor (12) is connected to the sun gear of the first planetary gear set (21), and the ring gear of the first planetary gear set (21) is connected to the speed change mechanism output shaft; Or, the first drive component includes an engine (11), a first motor (12), a first planetary gear set (21) and a C0 clutch (6), and the second drive component includes a second motor (13); The transmission shaft of the engine (11) is connected to the planet carrier of the first planetary gear set (21), the transmission shaft of the engine (11) is connected to the speed change mechanism output shaft through the C0 clutch (6), the transmission shaft of the first motor (12) is connected to the sun gear of the first planetary gear set (21), and the ring gear of the first planetary gear set (21) is connected to the transmission housing (4); Wherein, the second drive component further includes a second planetary gear set (22), the sun gear of the second planetary gear set (22) is connected to the transmission shaft of the second motor (13), the ring gear of the second planetary gear set (22) is connected to the transmission housing (4), and the planet carrier of the second planetary gear set (22) is connected to the speed change mechanism input shaft; A one-way clutch (5) is provided between the transmission shaft of the engine (11) and the planet carrier of the first planetary gear set (21).

2. The powertrain of the hybrid vehicle according to claim 1, characterized in that, The shift component (3) is a synchronizer, the synchronizer body is connected to the second drive component, and both sides of the synchronizer are respectively connected to the sun gear and the planet carrier of the third planetary gear set (23).

3. The powertrain of the hybrid vehicle according to claim 1, characterized in that, The shift component (3) includes a C1 clutch (31) and a C2 clutch (32), the C1 clutch (31) is used to connect the second drive component and the sun gear of the third planetary gear set (23), and the C2 clutch (32) is used to connect the second drive component and the planet carrier of the third planetary gear set (23).

4. A vehicle, characterized in that, Comprising a power assembly according to any one of claims 1 to 3.

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