CN217553681U

CN217553681U - Power assembly of hybrid electric vehicle and vehicle

Info

Publication number: CN217553681U
Application number: CN202221357934.7U
Authority: CN
Inventors: 高晓光; 宋廷彬; 李法友; 苏成云; 苑衍灵; 张广瀚; 刘肖; 李三帅; 万全喜
Original assignee: Shengrui Transmission Co Ltd
Current assignee: Shengrui Transmission Co Ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-10-11
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 for 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, a fourth planet row, a B1 brake, a C1 clutch and a C2 clutch; the ring gear of the fourth planetary row is connected with the transmission shell through the B1 brake, and the sun gear of the third planetary row and the sun gear of the fourth planetary row are both connected with the ring gear of the third planetary row through the C1 clutch. The power assembly can provide a plurality of output gears for the vehicle through the arrangement of the speed change mechanism, so that the torque of the vehicle during low-speed running can be improved, and the running speed of the vehicle during high-speed running can be improved; also, when a shift operation is performed, two of the B1 brake, the C1 clutch, and the C2 clutch are in an engaged state, which can reduce the risk of slip.

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 use scene of the existing hybrid electric vehicle is more and more complicated, and the vehicle needs to output power with high torque when climbing a slope and starting and also needs to output power with high rotating speed; the structure of the speed change mechanism carried on the existing hybrid electric vehicle is very simple, and the capability of adjusting the transmission ratio cannot support the vehicle to deal with a complex use scene.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the present disclosure provides a power assembly of a hybrid 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, a fourth planet row, a B1 brake, a C1 clutch and a C2 clutch;

the ring gear of the fourth planetary row is connected with the transmission housing through the B1 brake, the sun gear of the third planetary row and the sun gear of the fourth planetary row are both connected with the ring gear of the third planetary row through the C1 clutch, the planet carrier of the third planetary row is connected with the speed change mechanism input shaft, the ring gear of the third planetary row is connected with the planet carrier of the fourth planetary row through the C2 clutch, and the planet carrier of the fourth planetary row is connected with the speed change mechanism output shaft;

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 electric machine, a second electric machine, a first planetary gear train 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;

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

Optionally, the planetary gear set further comprises a second planetary gear set, a sun gear of the second planetary gear set is connected with a transmission shaft of the second motor, a ring gear of the second planetary gear set is connected with the transmission housing, and a planet carrier of the second planetary gear set 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, the third planetary row and the fourth planetary row are disposed in the second chamber in a close-fitting manner.

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

Optionally, the bonded steel sheet in the B1 brake is disposed on the transmission housing, and the friction plate in the B1 brake is disposed on the ring gear of the fourth planet row.

Optionally, the transmission mechanism input shaft, the third planet row, the C1 clutch, the C2 clutch, the fourth planet row and the transmission mechanism output shaft are sequentially arranged along the same axial direction.

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, the vehicle can provide a plurality of output gears through the arrangement of the speed change mechanism, so that the torque of the vehicle during low-speed running can be improved, the running speed of the vehicle during high-speed running can be improved, and the economy of the whole vehicle can be improved; and when the gear shifting operation is carried out, two of the B1 brake, the C1 clutch and the C2 clutch are in a combined state, so that the slipping risk can be reduced, and meanwhile, the idle discharge loss of the clutches can also be reduced.

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 diagram of each gear of a powertrain of a hybrid electric 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; 24. a fourth planet row; 31. b1, a brake; 32. a C1 clutch; 33. a C2 clutch; 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.

The use scene of the existing hybrid electric vehicle is more and more complicated, and the vehicle needs to output power with high torque when climbing a slope and starting and also needs to output power with high rotating speed; the existing speed change mechanism mounted on the hybrid electric vehicle is very simple in structure, and the capability of adjusting the transmission ratio cannot support the vehicle to cope with complex use scenes.

Based on this, the embodiment provides a power assembly of a hybrid electric vehicle and a vehicle, which can provide a plurality of output gears for the vehicle through the arrangement of a speed change mechanism, thereby not only improving the torque of the vehicle when the vehicle runs at a low speed, but also improving the running speed of the vehicle when the vehicle runs at a high speed, and simultaneously improving the economy of the whole vehicle; and when the gear shifting operation is carried out, two of the B1 brake, the C1 clutch and the C2 clutch are in a combined state, so that the slipping risk can be reduced, and meanwhile, the idle discharge loss of the clutches can also be reduced. This is illustrated in detail by the following specific examples:

referring to fig. 1 to 3, 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, a fourth planet row 24, a B1 brake 31, a C1 clutch 32 and a C2 clutch 33; the ring gear of the fourth planetary row 24 is connected with the transmission housing 4 through a B1 brake 31, the sun gear of the third planetary row 23 and the sun gear of the fourth planetary row 24 are both connected with the ring gear of the third planetary row 23 through a C1 clutch 32, the planet carrier of the third planetary row 23 is connected with the input shaft of the speed change mechanism, the ring gear of the third planetary row 23 is connected with the planet carrier of the fourth planetary row 24 through a C2 clutch 33, and the planet carrier of the fourth planetary row 24 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.

The vehicle can provide a plurality of output gears through the arrangement of the speed change mechanism, so that the torque of the vehicle during low-speed running can be improved, the running speed of the vehicle during high-speed running can be improved, and the economical efficiency of the whole vehicle can be improved; also, when a shift operation is performed, two of the B1 brake 31, the C1 clutch 32, and the C2 clutch 33 are in an engaged state, which can reduce the risk of slip while also reducing the idle loss of the clutches.

With continued reference to fig. 2, the power assembly includes 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. 1, the power assembly includes 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 action of reversing the vehicle by reversely driving the second motor 13 is easier to realize, and the cost of the whole set of power assembly is obviously reduced.

With continued reference to fig. 2, the powertrain further includes a second planetary gear set 22, a sun gear of the second planetary gear set 22 is connected with a transmission shaft of the second electric machine 13, a ring gear of the second planetary gear set 22 is connected with the transmission housing 4, and a planet carrier of the second planetary gear set 22 is connected with an input shaft of the speed change mechanism; through the setting of second planet row 22, can utilize the ring gear of second planet row 22 to be connected with derailleur housing 4 to the mode that the transmission shaft of second motor 13 and the sun gear of second planet row 22 are connected provides the effect that the speed reduction increased the turn round at the during operation for second motor 13, can utilize this power assembly's the mode of setting, chooses 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.

In a further embodiment, the third planet row 23 and the fourth planet row 24 are arranged snugly within the second chamber; this arrangement can reduce the volume of the structure for connecting the third planetary row 23 and the fourth planetary row 24, thereby making the structure of the transmission mechanism more compact and reducing the production cost.

In a further embodiment, a one-way clutch 5 is provided between the transmission shaft of the engine 11 and the planet carrier of the first planetary row 21; through the setting of one-way clutch 5, can prevent that engine 11 from taking place the reversal when second motor 13 is worked to prevent that engine 11 from taking place wearing and tearing because of idle running, can also reduce the noise level of whole car simultaneously.

In some embodiments, the bonded steel plates in the B1 brake 31 are provided on the transmission case 4, and the friction plates in the B1 brake 31 are provided on the ring gear of the fourth planetary row 24; it should be noted that, because the material of the planetary row is generally steel, and the material of the transmission housing 4 is generally aluminum alloy, the friction plate is arranged on the steel structure, and the combination steel sheet is arranged on the aluminum alloy structure, so that deformation of the transmission housing 4 can be prevented when the brake performs braking action, and the mass of the friction plate is lighter than that of the combination steel sheet, so that when the ring gear of the fourth planetary row 24 rotates, the rotational inertia is smaller, and the operation of the whole speed change mechanism is more stable and reliable.

With continued reference to fig. 1 and 2, the variator input shaft, the third planetary row 23, the C1 clutch 32, the C2 clutch 33, the fourth planetary row 24, and the variator output shaft are arranged in sequence along the same axial direction; the arrangement can enable the speed change mechanism to transmit power in a single direction, simplify the structure of parts in the speed change mechanism, reduce the number of tubular connecting pieces, more conveniently arrange other extension structures such as a speed measurement structure in the speed change mechanism and facilitate later upgrading and updating of the speed change mechanism; meanwhile, the third planetary row 23, the C1 clutch 32, the C2 clutch 33, and the fourth planetary row 24 may not be arranged in one extending direction, as long as the speed change mechanism can perform speed change and gear shift operations.

With continued reference to fig. 1, when the B1 brake 31 is used to control the ring gear of the fourth planetary gear set 24 instead of the sun gear, and the rotational speed is relatively low although the torque is relatively high, the bearing structure associated with the B1 brake 31 may be a low-cost bearing that cannot withstand high rotational speed.

With continued reference to fig. 1 to 3, the shifting element in fig. 3 is shifted into the first gear, i.e. the ring gear of the third planetary row 23 is connected to the sun gear of the fourth planetary row 24, and the B1 brake 31 is shifted into the engaged state, the ring gear of the fourth planetary row 24 is connected to the transmission housing 4; the shifting element in fig. 3 is shifted into the second gear, i.e. the ring gear of the third planetary row 23 is connected to the carrier of the fourth planetary row 24, and the B1 brake 31 is shifted into the engaged state, the ring gear of the fourth planetary row 24 is connected to the transmission housing 4; the shifting element in fig. 3 is shifted into the third gear, i.e. the ring gear of the third planetary row 23 is simultaneously connected to the carrier and the sun gear of the fourth planetary row 24, and the B1 brake 31 is shifted into the disengaged state, so that the ring gear of the fourth planetary row 24 is not connected to the transmission housing 4; it should be understood that the shift element is shifted to the first gear state, i.e., the B1 brake 31 and the C1 clutch 32 are engaged, the C2 clutch 33 is disengaged, the shift element is shifted to the second gear state, i.e., the B1 brake 31 and the C2 clutch 33 are engaged, the C1 clutch 32 is disengaged, the shift element is shifted to the third gear state, i.e., the C1 clutch 32 and the C2 clutch 33 are engaged, and the B1 brake 31 is disengaged.

The specific implementation manner and the implementation principle are the same as those of the above embodiments, and can bring the same or similar technical effects, and detailed description is omitted here, and specific reference may be made to the description of the power assembly 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 for 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), a fourth planet row (24), a B1 brake (31), a C1 clutch (32) and a C2 clutch (33);

the ring gear of the fourth planetary row (24) is connected with a transmission housing (4) through the B1 brake (31), the sun gear of the third planetary row (23) and the sun gear of the fourth planetary row (24) are connected with the ring gear of the third planetary row (23) through the C1 clutch (32), the planet carrier of the third planetary row (23) is connected with the transmission input shaft, the ring gear of the third planetary row (23) is connected with the planet carrier of the fourth planetary row (24) through the C2 clutch (33), and the planet carrier of the fourth planetary row (24) is connected with the transmission output shaft;

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);

the transmission shaft of the engine (11) is connected with the planet carrier of the first planet row (21), 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 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 ring gear of the second planetary gear set (22) is connected to the transmission housing (4), and a carrier of the second planetary gear set (22) is connected to the transmission input shaft.

5. Powertrain of a hybrid vehicle according to claim 4, characterized in that the transmission housing (4) comprises a first chamber in which the first planetary row (21) and the second planetary row (22) are arranged and a second chamber in which the gear change mechanism is arranged.

6. The powertrain of a hybrid vehicle according to claim 5, characterized in that the third planetary row (23) and the fourth planetary row (24) are disposed snugly in the second chamber.

7. 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).

8. The powertrain of a hybrid vehicle according to claim 1, characterized in that the bonded steel plates in the B1 brake (31) are provided on the transmission case (4), and the friction plates in the B1 brake (31) are provided on the ring gear of the fourth planetary row (24).

9. The powertrain of a hybrid vehicle according to claim 1, wherein the variator input shaft, the third planetary row (23), the C1 clutch (32), the C2 clutch (33), the fourth planetary row (24), and the variator output shaft are arranged in order in the same axial direction.

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