CN217532543U

CN217532543U - Power assembly of hybrid electric vehicle and vehicle

Info

Publication number: CN217532543U
Application number: CN202221357769.5U
Authority: CN
Inventors: 马宏刚; 高晓光; 苑衍灵; 刘敦宁; 赵培龙; 王硕; 杨庆鹤
Original assignee: Shengrui Transmission Co Ltd
Current assignee: Shengrui Transmission Co Ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-10-04
Anticipated expiration: 2032-05-31

Abstract

The present disclosure relates to the field of hybrid vehicles, and more particularly, to a powertrain and a vehicle of a hybrid vehicle. The power assembly of the hybrid electric vehicle includes: a power output mechanism and a speed change mechanism; the speed change mechanism comprises a speed change mechanism input shaft, a speed change mechanism output shaft, a third planet row and a gear shift assembly; the gear ring of the third planetary row is respectively connected with the input shaft of the speed change mechanism and the transmission shell through the gear shifting assembly, and the planet carrier of the third planetary row is connected with the output shaft of the speed change mechanism; the power output mechanism comprises a power assembly and a power output mechanism output shaft. The power assembly of the hybrid electric vehicle can realize the effect of providing larger torque for the planet carrier of the third planet row by utilizing the gear ring of the third planet row fixed by the transmission shell and the sun gear driven by the power output mechanism when the vehicle runs at low speed through the arrangement of the speed change mechanism, thereby providing larger torque for the vehicle when the vehicle runs at low speed.

Description

Power assembly of hybrid electric vehicle and vehicle

Technical Field

The present disclosure relates to the field of hybrid vehicles, and more particularly, to a powertrain and a vehicle for a hybrid vehicle.

Background

Driven by energy and environmental pressures and technical limitations, hybrid vehicles are becoming increasingly popular with consumers and manufacturers. The hybrid electric vehicle has the advantages of the traditional vehicle and the pure electric vehicle as a transition scheme for developing the pure electric vehicle, and is a new energy vehicle with practical value at present.

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

Although the motor has higher moment of torsion when the low rotational speed, the power assembly that uses at present often has the condition that moment of torsion is not enough when applying to commercial car or the vehicle that needs often climb the slope, and the moment of torsion is high enough to become the common fault of many hybrid vehicle when whole power assembly low-speed, often uses the second motor through changing the big moment of torsion model now to solve this problem, but with high costs, it is impractical.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the present disclosure provides a powertrain of a hybrid vehicle and a vehicle.

In a first aspect, the present disclosure provides a powertrain of a hybrid vehicle, comprising: a power output mechanism and a speed change mechanism;

the speed change mechanism comprises a speed change mechanism input shaft, a speed change mechanism output shaft, a third planet row and a gear shift assembly;

the gear ring of the third planetary row is respectively connected with the input shaft of the speed change mechanism and the transmission shell through the gear shifting assembly, and the planet carrier of the third planetary row is connected with the output shaft of the speed change mechanism;

the power output mechanism comprises a power assembly and a power output mechanism output shaft, the power output mechanism output shaft is connected with the speed change mechanism input shaft, and the power assembly is used for providing driving force.

Optionally, the power assembly includes an engine, a first motor, a second motor and a first planetary gear set;

a transmission shaft of the engine is connected with a planet carrier of the first planetary row, a transmission shaft of the first motor is connected with a sun gear of the first planetary row, and a gear ring of the first planetary row is connected with an input shaft of the speed change mechanism;

and a transmission shaft of the second motor is connected with an input shaft of the speed change mechanism.

Optionally, the power assembly includes an engine, a first motor, a second motor, a first planetary gear set and a C0 clutch;

a transmission shaft of the engine is connected with a planet carrier of the first planetary row, the transmission shaft of the engine is connected with the input shaft of the speed change mechanism through the C0 clutch, a transmission shaft of the first motor is connected with a sun gear of the first planetary row, and a gear ring of the first planetary row is connected with the transmission shell;

Optionally, the transmission device further comprises a second planet row, a sun gear of the second planet row is connected with a transmission shaft of the second motor, a planet carrier of the second planet row is connected with the transmission housing, and a ring gear of the second planet row is connected with the input shaft of the speed change mechanism.

Optionally, the transmission housing includes a first chamber and a second chamber, the first planetary row and the second planetary row are disposed in the first chamber, and the variator is disposed in the second chamber.

Optionally, a one-way clutch is arranged between the transmission shaft of the engine and the planet carrier of the first planetary row.

Optionally, the gear shift assembly is a synchronizer, the synchronizer body is connected with the gear ring of the third planetary gear set, and two sides of the synchronizer are respectively connected with the input shaft of the speed change mechanism and the transmission housing.

Optionally, the shift assembly includes two clutches, one of the clutches is used for connecting the transmission input shaft and the ring gear of the third planetary row, and the other clutch is used for connecting the ring gear of the third planetary row and the transmission housing.

In a second aspect, the present disclosure provides a vehicle comprising a powertrain as described above.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

according to the power assembly of the hybrid electric vehicle, through the arrangement of the speed change mechanism, when the vehicle runs at a low speed, the effect of providing larger torque for the planet carrier of the third planet row is achieved by utilizing the gear ring of the third planet row fixed by the transmission shell and the sun gear driven by the power output mechanism, and therefore larger torque is provided for the vehicle when the vehicle runs at the low speed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a powertrain of a hybrid electric vehicle according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a powertrain of a hybrid vehicle according to a second embodiment of the disclosure;

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

FIG. 4 is a schematic structural diagram of a one-way clutch disposed in a powertrain of a hybrid vehicle according to an embodiment of the present disclosure;

fig. 5 is a shift logic diagram of a powertrain of a hybrid vehicle according to an embodiment of the disclosure.

11, an engine; 12. a first motor; 13. a second motor; 21. a first planet row; 22. a second planet row; 23. a third planet row; 3. a shift assembly; 4. a transmission housing; 5. a one-way clutch; 6. and a C0 clutch.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

Driven by energy and environmental pressures and technical limitations, hybrid vehicles are becoming increasingly popular with consumers and manufacturers. The hybrid electric vehicle has the advantages of both the traditional vehicle and the pure electric vehicle as a transition scheme for developing the pure electric vehicle, and is a new energy vehicle with practical value at present.

In view of this, the present embodiment provides a powertrain of a hybrid vehicle and a vehicle, which can realize the effect of providing a greater torque to a carrier of a third planetary row by using a ring gear of the third planetary row fixed by a transmission case and a sun gear driven by a power output mechanism when the vehicle runs at a low speed through the arrangement of a speed change mechanism, thereby providing a greater torque to the vehicle when the vehicle runs at a low speed. This is illustrated in detail by the following specific examples:

referring to fig. 1 to 5, a powertrain of a hybrid vehicle according to the present embodiment includes: a power output mechanism and a speed change mechanism; the speed change mechanism comprises a speed change mechanism input shaft, a speed change mechanism output shaft, a third planet row 23 and a gear shift assembly 3; the gear ring of the third planetary row 23 is connected with the input shaft of the speed change mechanism and the transmission housing 4 through the gear shift assembly 3, and the planet carrier of the third planetary row 23 is connected with the output shaft of the speed change mechanism; the power output mechanism comprises a power assembly and a power output mechanism output shaft, the power output mechanism output shaft is connected with the speed change mechanism input shaft, and the power assembly is used for providing driving force.

By providing the speed change mechanism, when the vehicle is running at a low speed, the ring gear of the third planetary row 23 fixed by the transmission case 4 and the sun gear driven by the power output mechanism are utilized to achieve the effect of providing a larger torque to the carrier of the third planetary row 23, so that a larger torque is provided to the vehicle when the vehicle is running at a low speed.

With continued reference to fig. 1, the power assembly may include an engine 11, a first electric machine 12, a second electric machine 13, and a first planetary gear set 21; a transmission shaft of the engine 11 is connected with a planet carrier of the first planet row 21, a transmission shaft of the first motor 12 is connected with a sun gear of the first planet row 21, and a gear ring of the first planet row 21 is connected with an input shaft of the speed change mechanism; the transmission shaft of the second motor 13 is connected with the input shaft of the speed change mechanism; by the arrangement, when the power output mechanism works, the first motor 12 can complete the speed regulation work of the engine 11, so that the engine 11 can be always kept in an economic rotating speed range during working, and the economy of a vehicle is improved.

With continued reference to fig. 2, the power assembly may further include an engine 11, a first electric machine 12, a second electric machine 13, a first planetary gear set 21, and a C0 clutch 6; a transmission shaft of the engine 11 is connected with a planet carrier of the first planetary row 21, the transmission shaft of the engine 11 is connected with an input shaft of the speed change mechanism through a C0 clutch 6, a transmission shaft of the first motor 12 is connected with a sun gear of the first planetary row 21, and a gear ring of the first planetary row 21 is connected with the transmission shell 4; the transmission shaft of the second motor 13 is connected with the input shaft of the speed change mechanism; through the arrangement of 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, so that the control difficulty of the engine 11 and the first motor 12 is reduced, the reverse rotation of the vehicle driven by the second motor 13 is easier to realize, and the cost of the whole set of power assembly is remarkably reduced.

The power assembly can be driven by a pure electric drive mode in which the second motor 13 provides power, a fuel drive mode in which the engine 11 provides power, and a hybrid drive mode in which the engine 11 and the second motor 13 provide power.

With continued reference to fig. 1 to 3, the powertrain of the hybrid vehicle 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 electric machine 13, the carrier of the second planetary gear set 22 is connected to the transmission housing 4, and the ring gear of the second planetary gear set 22 is connected to the input shaft of the speed change mechanism; through the setting of second planet row 22, can utilize the planet carrier of second planet row 22 to be connected with derailleur housing 4 to the transmission shaft of second motor 13 is connected with the sun gear of second planet row 22, utilizes the mode of ring gear output, for second motor 13 provides the effect that the speed reduction increased the turn round at the during operation, thereby can choose for use the second motor 13 that the moment of torsion is littleer, thereby further reduce whole car cost, can also reduce the occupation space of this power assembly.

In some embodiments, the transmission housing 4 includes a first chamber in which the first planetary row 21 and the second planetary row 22 are disposed and a second chamber in which the variator is disposed; by the arrangement, the situation that the structure in the second chamber is too compact to influence the clutch structure in the speed change mechanism to establish oil pressure can be prevented, the structure of the whole power assembly can be conveniently produced in a modularized manner, the structure in the first chamber or the structure in the second chamber can be independently upgraded and transformed or replaced, and the universality of the power assembly is remarkably improved; it should be noted that the first planetary row 21 and the second planetary row 22 can be disposed in close contact in the first chamber, and this arrangement can reduce the volume of the structure for connecting the first planetary row 21 and the second planetary row 22, thereby making the structure of the speed change mechanism more compact and reducing the production cost.

With continued reference to fig. 4, a one-way clutch 5 is provided between the transmission shaft of the engine 11 and the carrier of the first planetary row 21; through the arrangement of the one-way clutch 5, the reverse rotation of the engine 11 can be prevented when the second motor 13 works, so that the abrasion of the engine 11 due to idling is prevented, and the noise level of the whole vehicle can be reduced.

In some embodiments, the shifting unit 3 is a synchronizer, the synchronizer body is connected with the ring gear of the third planetary row 23, and both sides of the synchronizer are respectively connected with the transmission shaft of the second electric machine 13 and the transmission housing 4; when the synchronizer is used as the gear shifting assembly 3, a special hydraulic system is not required to be arranged in the transmission shell 4, the cost can be effectively reduced, the control mode is simpler, and the economical efficiency and the practicability of the power assembly are obviously improved.

With continued reference to fig. 3, the shifting assembly 3 comprises two clutches, one of which is used to connect the drive shaft of the second electric machine 13 with the ring gear of the third planetary row 23, and the other clutch is used to connect the ring gear of the third planetary row 23 with the transmission housing 4; when using two clutches to come as subassembly 3 that shifts gears, can more accurate faster realization action of shifting gears, obviously improve the reliability that shift efficiency and fender position kept.

With continued reference to fig. 1, the powertrain further comprises a second planetary gear set 22, the sun gear of the second planetary gear set 22 is connected with the transmission shaft of the second electric machine 13, the planet carrier of the second planetary gear set 22 is connected with the transmission housing 4, and the ring gear of the second planetary gear set 22 is connected with the ring gear of the third planetary gear set 23 through the gear shift assembly 3; through the setting of second planet row 22, the planet carrier that can utilize second planet row 22 is connected with derailleur housing 4, and the mode that the transmission shaft of second motor 13 is connected with the sun gear of second planet row 22, for second motor 13 provides the effect that the deceleration increased torsion at the during operation, simultaneously can also cooperate the setting of third planet row 23, realize the dual effect of increasing torsion, then can utilize the mode that sets up of this power assembly, choose the second motor 13 that the moment of torsion is littleer for use, thereby further reduce whole car cost, can also reduce the occupation space of this power assembly.

The engine 11 can be driven to complete the start by the first motor 12 and the first planetary gear set 21.

With continued reference to fig. 1 to 5, the shifting of the shift element to the R-engaged state in fig. 5 means that the shift assembly 3 is shifted to the first gear state, i.e. the ring gear of the third planetary row 23 is connected to the transmission housing 4; the shifting of the shift element to the L-engaged state in fig. 5 means that the shift assembly 3 is shifted to the second gear, i.e. the ring gear of the third planetary row 23 is connected to the ring gear of the second planetary row 22.

When the vehicle speed is not more than 10km/h, the gear shifting assembly 3 is switched to a first gear state, the gear ring of the third planet row 23 is connected with the transmission shell 4, the second motor 13 is used for driving the vehicle to run, and the working condition can utilize the torque increasing effect of the second planet row 22 and the torque increasing effect of the third planet row 23 to improve the torque of the vehicle when the vehicle runs at low speed.

When the vehicle speed is more than 10km/h and not more than 30km/h, the gear shifting assembly 3 is switched to a two-gear state, the gear ring of the third planet row 23 is connected with the input shaft of the speed change mechanism, the second motor 13 is used for driving the vehicle to run, the torque increasing effect is achieved only through the second planet row 22 under the working condition, the torque increasing effect is not achieved through the third planet row 23 any more, and therefore the running speed of the whole vehicle is improved.

When the vehicle speed is greater than 30km/h and not greater than 60km/h, the shifting assembly 3 is switched to the first gear state, the ring gear of the third planetary row 23 is connected with the transmission housing 4, the engine 11 is used for driving the vehicle to run, the working condition can utilize the torque increasing effect of the second planetary row 22 and the torque increasing effect of the third planetary row 23, and the torque of the engine 11 is divided into the first motor 12 and the ring gears of the first planetary row 21, wherein the ratio of the divided torque of the first motor 12 and the ring gears of the first planetary row 21 is 1:4.

When the vehicle speed is more than 60km/h and not more than 120km/h, the gear shifting assembly 3 is switched to a second gear state, the gear ring of the third planetary row 23 is connected with the input shaft of the speed change mechanism, the engine 11 is used for driving the vehicle to run, the torque increasing effect is achieved only through the second planetary row 22 under the working condition, the torque increasing effect is not achieved any more through the third planetary row 23, and therefore the stability and the economy of the vehicle at a high running speed are guaranteed.

When the vehicle needs to accelerate to exceed a front obstacle, the gear shifting assembly 3 can be switched to a first gear state at the moment, the gear ring of the third planet row 23 is connected with the transmission shell 4, the engine 11, the first motor 12 and the second motor 13 are started at the moment, the torque of the vehicle is improved through a hybrid mode, and therefore the overtaking efficiency is improved.

When the vehicle needs a higher speed, the gear shifting assembly 3 can be switched to a second gear state at the moment, so that the gear ring of the third planetary gear set 23 is connected with the input shaft of the speed change mechanism, the engine 11, the first motor 12 and the second motor 13 are started at the same time, the total output power is improved through a hybrid mode, and the vehicle speed is obviously improved.

The specific implementation manner and implementation principle are the same as those of the above embodiments, and the same or similar technical effects can be brought, which are not described herein again, and reference may be made to the description of the powertrain embodiment of the hybrid electric vehicle.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A powertrain of a hybrid vehicle, comprising: a power output mechanism and a speed change mechanism;

the speed change mechanism comprises a speed change mechanism input shaft, a speed change mechanism output shaft, a third planet row (23) and a gear shift assembly (3);

the gear ring of the third planetary row (23) is respectively connected with the input shaft of the speed change mechanism and the transmission housing (4) through the gear shifting assembly (3), and the planet carrier of the third planetary row (23) is connected with the output shaft of the speed change mechanism;

2. The powertrain of the hybrid vehicle according to claim 1, characterized in that the power components include an engine (11), a first electric machine (12), a second electric machine (13), and a first planetary gear train (21);

a transmission shaft of the engine (11) is connected with a planet carrier of the first planet row (21), a transmission shaft of the first motor (12) is connected with a sun gear of the first planet row (21), and a gear ring of the first planet row (21) is connected with an input shaft of the speed change mechanism;

and a transmission shaft of the second motor (13) is connected with the input shaft of the speed change mechanism.

3. The powertrain of a hybrid vehicle according to claim 1, characterized in that the power components include an engine (11), a first electric machine (12), a second electric machine (13), a first planetary gear set (21) and a C0 clutch (6);

the transmission shaft of the engine (11) is connected with the planet carrier of the first planet row (21), the transmission shaft of the engine (11) is connected with the input shaft of the speed change mechanism through the C0 clutch (6), the transmission shaft of the first motor (12) is connected with the sun gear of the first planet row (21), and the gear ring of the first planet row (21) is connected with the transmission shell (4);

4. A hybrid vehicle powertrain according to any one of claims 2 or 3, further comprising a second planetary gear set (22), wherein a sun gear of the second planetary gear set (22) is connected to a transmission shaft of the second electric machine (13), a carrier of the second planetary gear set (22) is connected to the transmission housing (4), and a ring gear of the second planetary gear set (22) is connected to the transmission input shaft.

5. The powertrain of a hybrid vehicle according to claim 4, characterized in that the transmission housing (4) includes a first chamber in which the first planetary row (21) and the second planetary row (22) are disposed and a second chamber in which the speed change mechanism is disposed.

6. A hybrid vehicle powertrain according to any one of claims 2 or 3, characterised in that a one-way clutch (5) is provided between the drive shaft of the engine (11) and the planet carrier of the first planetary row (21).

7. The powertrain of a hybrid vehicle according to claim 1, characterized in that the shift assembly (3) is a synchronizer, the synchronizer body is connected with the ring gear of the third planetary row (23), and both sides of the synchronizer are respectively connected with the transmission input shaft and the transmission housing (4).

8. Hybrid vehicle powertrain according to claim 1, characterised in that the shifting group (3) comprises two clutches, one of which is used to connect the variator input shaft to the ring gear of the third planetary row (23) and the other of which is used to connect the ring gear of the third planetary row (23) to the transmission housing (4).

9. A vehicle comprising a powertrain as claimed in any one of claims 1 to 8.