Powertrain of a hybrid vehicle and vehicle

Abstract

The present disclosure relates to the technical field of hybrid electric vehicles, in particular to a power assembly of a hybrid electric vehicle and a vehicle. The power assembly of the hybrid electric vehicle comprises a power output mechanism and a transmission mechanism; the transmission mechanism comprises a transmission mechanism input shaft, a transmission mechanism output shaft, a third planetary gear set, a fourth planetary gear set, a B1 brake, a B2 brake, a C1 clutch and a C2 clutch; the ring gear of the third planetary gear set is connected with the transmission housing through the B2 brake, and the sun gear of the third planetary gear set and the sun gear of the fourth planetary gear set are both connected with the transmission housing through the B1 brake. The power assembly of the hybrid electric vehicle can provide multiple output gears for the vehicle through the setting of the transmission mechanism, which can improve the torque of the vehicle when running at low speed and the running speed of the vehicle when running at high speed; the transmission mechanism can make the third planetary gear set and the fourth planetary gear set rotate synchronously when the C1 clutch and the C2 clutch are closed at the same time.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of hybrid electric vehicles, in particular to a power assembly of a hybrid electric vehicle and a vehicle. BACKGROUND

[0002] Under the pressure of energy and environmental protection and the limitation of technology, hybrid electric vehicles are increasingly favored by consumers and manufacturers. Hybrid electric vehicles, as a transitional solution to pure electric vehicles, have the advantages of both traditional vehicles and pure electric vehicles, and are currently very practical new energy vehicles.

[0003] The use scenarios of hybrid electric vehicles are becoming more and more complex. Vehicles need to output high torque power when climbing and starting, and also need to output high speed power. The transmission mechanism currently mounted on hybrid electric vehicles has a very simple structure, and the ability to adjust the transmission ratio cannot support the vehicle to cope with complex use scenarios. SUMMARY

[0004] To solve the above technical problems, the present disclosure provides a power assembly of a hybrid electric vehicle and a vehicle.

[0005] In a first aspect, the present disclosure provides a power assembly of a hybrid electric vehicle, comprising: a power output mechanism and a transmission mechanism;

[0006] The transmission mechanism comprises a transmission mechanism input shaft, a transmission mechanism output shaft, a third planetary gear set, a fourth planetary gear set, a B1 brake, a B2 brake, a C1 clutch and a C2 clutch;

[0007] The ring gear of the third planetary gear set is connected with the transmission housing through the B2 brake, the sun gear of the third planetary gear set and the sun gear of the fourth planetary gear set are connected with the transmission housing through the B1 brake, the sun gear of the third planetary gear set and the sun gear of the fourth planetary gear set are connected with the ring gear of the fourth planetary gear set through the C2 clutch, the carrier of the third planetary gear set is connected with the transmission mechanism output shaft, the carrier of the third planetary gear set is connected with the ring gear of the fourth planetary gear set through the C1 clutch, and the carrier of the fourth planetary gear set is connected with the transmission mechanism input shaft;

[0008] 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 transmission mechanism input shaft, and the power assembly is used to provide driving force.

[0009] Optionally, the power assembly comprises an engine, a first motor, a second motor and a first planetary gear set.

[0010] The transmission shaft of the engine is connected with the planet carrier of the first planetary gear set, the transmission shaft of the first motor is connected with the sun gear of the first planetary gear set, and the ring gear of the first planetary gear set is connected with the input shaft of the transmission mechanism.

[0011] The transmission shaft of the second motor is connected with the input shaft of the transmission mechanism.

[0012] Optionally, the power assembly comprises an engine, a first motor, a second motor, a first planetary gear set and a CO clutch.

[0013] The transmission shaft of the engine is connected with the planet carrier of the first planetary gear set, the transmission shaft of the engine is connected with the input shaft of the transmission mechanism through the CO clutch, the transmission shaft of the first motor is connected with the sun gear of the first planetary gear set, and the ring gear of the first planetary gear set is connected with the transmission housing.

[0014] The transmission shaft of the second motor is connected with the input shaft of the transmission mechanism.

[0015] Optionally, a second planetary gear set is further included, the sun gear of the second planetary gear set is connected with the transmission shaft of the second motor, the ring gear of the second planetary gear set is connected with the transmission housing, and the planet carrier of the second planetary gear set is connected with the input shaft of the transmission mechanism.

[0016] Optionally, the transmission housing comprises a first chamber and a second chamber, the first planetary gear set and the second planetary gear set are arranged in the first chamber, and the transmission mechanism is arranged in the second chamber.

[0017] Optionally, the third planetary gear set and the fourth planetary gear set are arranged in close contact in the second chamber.

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

[0019] Optionally, the engaging steel sheet in the B1 brake is arranged on the transmission housing, the sun gear of the third planetary gear set and the sun gear of the fourth planetary gear set are connected through a connecting member, and the friction sheet in the B1 brake is arranged on the connecting member.

[0020] And / or the engaging steel sheet in the B2 brake is arranged on the transmission housing, and the friction sheet in the B2 brake is arranged on the ring gear of the third planetary gear set.

[0021] Optionally, a synchronizer is further included, the body of the synchronizer is arranged on the transmission housing, and the engaging structures at both ends of the synchronizer are the B1 brake and the B2 brake respectively.

[0022] In a second aspect, the disclosure provides a vehicle comprising the power assembly as described above.

[0023] Compared with the prior art, the technical scheme provided by the embodiments of the disclosure has the following advantages:

[0024] The power assembly of the hybrid vehicle provided by the disclosure can provide multiple output gears for the vehicle through the setting of the transmission mechanism, which can improve the torque of the vehicle during low-speed driving, improve the driving speed of the vehicle during high-speed driving, and improve the economy of the vehicle. Through the setting of the C1 clutch and the C2 clutch, the third planetary row and the fourth planetary row can be made to rotate synchronously when the C1 clutch and the C2 clutch are closed at the same time, so that the transmission ratio of the entire transmission mechanism is 1, and the transmission efficiency of the power assembly is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the disclosure and, together with the specification, serve to explain the principles of the disclosure.

[0026] In order to more clearly illustrate the technical schemes in the embodiments of the disclosure or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0027] Figure 1 A structural schematic diagram of the power assembly of the hybrid vehicle according to an embodiment of the disclosure is shown in the figure.

[0028] Figure 2 A structural schematic diagram of the power assembly of the hybrid vehicle according to a second embodiment of the disclosure is shown in the figure.

[0029] Figure 3 A structural schematic diagram of the power assembly of the hybrid vehicle according to a third embodiment of the disclosure is shown in the figure.

[0030] Figure 4 A schematic diagram of each gear of the power assembly of the hybrid vehicle according to an embodiment of the disclosure is shown in the figure.

[0031] In the figure, 11 is an engine, 12 is a first motor, 13 is a second motor, 21 is a first planetary row, 22 is a second planetary row, 23 is a third planetary row, 24 is a fourth planetary row, 31 is a B1 brake, 32 is a B2 brake, 33 is a C1 clutch, 34 is a C2 clutch, 35 is a C3 clutch, 4 is a transmission housing, 5 is a one-way clutch, and 6 is a C0 clutch. DETAILED DESCRIPTION

[0032] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0033] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0034] Driven by energy and environmental pressures, as well as technological limitations, hybrid vehicles are gaining increasing favor among consumers and manufacturers. As a transitional solution towards pure electric vehicles, hybrid vehicles combine the advantages of both traditional and pure electric vehicles, making them a highly practical new energy vehicle option.

[0035] Hybrid vehicles are now used in increasingly complex scenarios. They need to deliver high torque and power when climbing hills and starting, as well as high-speed power output. However, the transmission mechanisms currently used in hybrid vehicles are very simple, and their ability to adjust the transmission ratio is insufficient to support the vehicle in dealing with complex usage scenarios.

[0036] Based on this, this embodiment provides a powertrain and vehicle for a hybrid electric vehicle. Through the configuration of the transmission mechanism, the vehicle can provide multiple output gears, which can improve torque at low speeds and increase speed at high speeds, while also improving overall vehicle fuel economy. The configuration of clutches C1 and C2 allows the third and fourth planetary gear sets to rotate synchronously when both clutches are engaged simultaneously, resulting in a transmission ratio of 1 for the entire transmission mechanism, significantly improving the powertrain's transmission efficiency. A detailed description follows with specific embodiments:

[0037] Reference Figures 1 to 4As shown, the power assembly of the hybrid vehicle provided by the embodiment comprises a power output mechanism and a transmission mechanism; the transmission mechanism comprises a transmission mechanism input shaft, a transmission mechanism output shaft, a third planetary gear set 23, a fourth planetary gear set 24, a B1 brake 31, a B2 brake 32, a C1 clutch 33 and a C2 clutch 34; the ring gear of the third planetary gear set 23 is connected with the transmission housing 4 through the B2 brake 32, the sun gear of the third planetary gear set 23 and the sun gear of the fourth planetary gear set 24 are both connected with the transmission housing 4 through the B1 brake 31, the sun gear of the third planetary gear set 23 and the sun gear of the fourth planetary gear set 24 are both connected with the ring gear of the fourth planetary gear set 24 through the C2 clutch 34, the carrier of the third planetary gear set 23 is connected with the transmission mechanism output shaft, the carrier of the third planetary gear set 23 is connected with the ring gear of the fourth planetary gear set 24 through the C1 clutch 33, and the carrier of the fourth planetary gear set 24 is connected with the transmission mechanism input 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 transmission mechanism input shaft, and the power assembly is used for providing driving force.

[0038] Through the arrangement of the transmission mechanism, the vehicle can provide multiple output gears, which can improve the torque of the vehicle when running at low speed, improve the running speed of the vehicle when running at high speed, and improve the economy of the vehicle; through the arrangement of the C1 clutch 33 and the C2 clutch 34, the third planetary gear set 23 and the fourth planetary gear set 24 can be made to rotate synchronously when the C1 clutch 33 and the C2 clutch 34 are closed at the same time, so that the transmission ratio of the entire transmission mechanism is 1, and the transmission efficiency of the power assembly is significantly improved.

[0039] Continuing to refer to Figure 1 As shown, the power assembly comprises an engine 11, a first motor 12, a second motor 13 and a first planetary gear set 21; the transmission shaft of the engine 11 is connected with the carrier of the first planetary gear set 21, the transmission shaft of the first motor 12 is connected with the sun gear of the first planetary gear set 21, and the ring gear of the first planetary gear set 21 is connected with the transmission mechanism input shaft; in this way, when the power output mechanism is working, the first motor 12 can be used to complete the work of regulating the speed of the engine 11, so that the engine 11 can always be kept in the economic speed range when working, and the economy of the vehicle is improved.

[0040] Continuing to refer to Figure 2 and Figure 3As shown, the power assembly includes an engine 11, a first motor 12, a second motor 13, a first planetary gear set 21 and a C0 clutch 6; the transmission shaft of the engine 11 is connected with the carrier of the first planetary gear set 21, the transmission shaft of the engine 11 is connected with the input shaft of the transmission mechanism through the C0 clutch 6, the transmission shaft of the first motor 12 is connected with the sun gear of the first planetary gear set 21, the ring gear of the first planetary gear set 21 is connected with the transmission housing 4; the transmission shaft of the second motor 13 is connected with the input shaft of the transmission mechanism; through the setting 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 are disconnected, thereby reducing the control difficulty of the engine 11 and the first motor 12, more easily realizing the action of the second motor 13 reversely driving the vehicle to reverse, and significantly reducing the cost of the whole power assembly.

[0041] Continuing to refer to Figure 1 As shown, the power assembly further includes 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 motor 13, the ring gear of the second planetary gear set 22 is connected with the transmission housing 4, and the carrier of the second planetary gear set 22 is connected with the input shaft of the transmission mechanism; through the setting of the second planetary gear set 22, the ring gear of the second planetary gear set 22 is connected with the transmission housing 4, and the transmission shaft of the second motor 13 is connected with the sun gear of the second planetary gear set 22, thereby providing the second motor 13 with the effect of speed reduction and torque increase when working, and through the setting mode of the power assembly, a second motor 13 with smaller torque can be selected, thereby further reducing the cost of the whole vehicle and also reducing the occupied space of the power assembly.

[0042] Continuing to refer to Figure 1 As shown, the transmission housing 4 includes a first chamber and a second chamber, the first planetary gear set 21 and the second planetary gear set 22 are arranged in the first chamber, and the transmission mechanism is arranged in the second chamber; such arrangement not only prevents the structure inside the second chamber from being too compact to affect the establishment of oil pressure of the clutch structure in the transmission mechanism, but also facilitates the modular production of the structure of the whole power assembly, and the structure in the first chamber or the structure in the second chamber can be upgraded, modified or replaced separately, thereby significantly improving the universality of the power assembly; it should be noted that the first planetary gear set 21 and the second planetary gear set 22 can be arranged closely in the first chamber, and such arrangement can reduce the volume of the structure for connecting the first planetary gear set 21 and the second planetary gear set 22, thereby making the structure of the transmission mechanism more compact and reducing the production cost.

[0043] In some embodiments, the third planetary gear set 23 and the fourth planetary gear set 24 are arranged closely in the second chamber; such arrangement can reduce the volume of the structure for connecting the third planetary gear set 23 and the fourth planetary gear set 24, thereby making the structure of the transmission mechanism more compact and reducing the production cost.

[0044] Continuing to refer toFigure 2 and Figure 3 As shown, a one-way clutch 5 is provided between the drive shaft of the engine 11 and the planet carrier of the first planetary gear 21. By setting the one-way clutch 5, the engine 11 can be prevented from reversing when the second motor 13 is working, thereby preventing the engine 11 from wearing due to idling, and also reducing the noise level of the whole vehicle.

[0045] In some embodiments, the connecting steel plate in brake B1 31 is disposed on the transmission housing 4, the sun gear of the third planetary gear set 23 and the sun gear of the fourth planetary gear set 24 are connected by a connector, and the friction plate in brake B1 31 is disposed on the connector; and / or the connecting steel plate in brake B2 32 is disposed on the transmission housing 4, and the friction plate in brake B2 32 is disposed on the ring gear of the third planetary gear set 23. It should be noted that the material of the connector is steel, and since the material of the planetary gear set structure is generally steel, and the material of the transmission housing 4 is generally aluminum alloy, so disposing of the friction plate on the steel structure and the connecting steel plate on the aluminum alloy structure can prevent deformation of the transmission housing 4 when the brake is applied. Moreover, the mass of the friction plate is lighter than that of the connecting steel plate, so the moment of inertia of the connector, the sun gear of the third planetary gear set 23 or the sun gear of the fourth planetary gear set 24 is smaller when they rotate, which makes the operation of the entire transmission mechanism smoother and more reliable.

[0046] Continue to refer to Figure 4 As shown, when the transmission mechanism is in first gear, brake B2 32 and clutch C1 33 are engaged; when the transmission mechanism is in second gear, brake B2 32 and clutch C2 34 are engaged; when the transmission mechanism is in third gear, clutch C1 33 and clutch C2 34 are engaged, realizing a direct drive, and the transmission mechanism has the highest transmission efficiency; when the transmission mechanism is in fourth gear, brake B1 31 and clutch C2 34 are engaged.

[0047] In some embodiments, the powertrain further includes a synchronizer, the body of which is disposed on the transmission housing 4, and the connecting structures at both ends of the synchronizer are brake B1 31 and brake B2 32, respectively. Since brake B1 31 and brake B2 32 will not close simultaneously, brake B1 31 and brake B2 32 can be integrated on the same synchronizer. This arrangement eliminates the need for a dedicated hydraulic system for the synchronizer within the transmission housing 4, effectively reducing costs and simplifying the control mode, thus significantly improving the economy and practicality of the powertrain.

[0048] Continue to refer to Figure 3As shown, the B2 brake 32 can be cancelled, and then the sun gear of the third planetary gear set 23 is connected with the connecting member through the C3 clutch 35; in this way, the torque borne by the clutch structure is smaller, the clutch can be designed to be lighter, and the design work is easier; when the B2 brake 32 is used instead of the C3 clutch 35, the torque borne by the B2 brake 32 is larger, but the rotational speed is relatively low, and the bearing structure matched with the B2 brake 32 can use low-cost bearings that cannot bear high rotational speed.

[0049] In a second aspect, the present disclosure provides a vehicle comprising the power assembly as described above.

[0050] The specific implementation and implementation principles are the same as those of the above-described embodiments, and can bring the same or similar technical effects, which will not be repeated here. For details, refer to the description of the above-described power assembly embodiments of the hybrid vehicle.

[0051] It should be noted that, in this document, relational terms such as "first" and "second", and the like, are 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. Moreover, the terms "comprises", "comprising", or any other variations 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 can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the statement "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0052] The above description is merely one implementation of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be apparent 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 will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A powertrain of a hybrid vehicle, characterized by comprising: Comprising: a power output mechanism and a transmission mechanism; the transmission mechanism comprises a transmission mechanism input shaft, a transmission mechanism output shaft, a third planetary gear set (23), a fourth planetary gear set (24), a B1 brake (31), a B2 brake (32), a C1 clutch (33), and a C2 clutch (34); the ring gear of the third planetary gear set (23) is connected with the transmission housing (4) through the B2 brake (32), the sun gear of the third planetary gear set (23) and the sun gear of the fourth planetary gear set (24) are both connected with the transmission housing (4) through the B1 brake (31), the sun gear of the third planetary gear set (23) and the sun gear of the fourth planetary gear set (24) are both connected with the ring gear of the fourth planetary gear set (24) through the C2 clutch (34), the carrier of the third planetary gear set (23) is connected with the transmission mechanism output shaft, the carrier of the third planetary gear set (23) and the ring gear of the fourth planetary gear set (24) are connected through the C1 clutch (33), the carrier of the fourth planetary gear set (24) is connected with the transmission mechanism input 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 transmission mechanism input shaft, and the power assembly is used for providing driving force; the power assembly comprises an engine (11), a first motor (12), a second motor (13), and a first planetary gear set (21); the transmission shaft of the engine (11) is connected with the carrier of the first planetary gear set (21), the transmission shaft of the first motor (12) is connected with the sun gear of the first planetary gear set (21), and the ring gear of the first planetary gear set (21) is connected with the transmission mechanism input shaft; further comprising 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 motor (13), the ring gear of the second planetary gear set (22) is connected with the transmission housing (4), and the carrier of the second planetary gear set (22) is connected with the transmission mechanism input shaft; or, the power assembly comprises an engine (11), a first motor (12), a second motor (13), a first planetary gear set (21), and a C0 clutch (6); the transmission shaft of the engine (11) is connected with the carrier of the first planetary gear set (21), the transmission shaft of the engine (11) is connected with the transmission mechanism input shaft through the C0 clutch (6), the transmission shaft of the first motor (12) is connected with the sun gear of the first planetary gear set (21), and the ring gear of the first planetary gear set (21) is connected with the transmission housing (4); the transmission shaft of the second motor (13) is connected with the transmission mechanism input shaft.

2. The powertrain of claim 1, wherein The transmission housing (4) comprises a first chamber and a second chamber, the first planetary gear set (21) and the second planetary gear set (22) are arranged in the first chamber, and the transmission mechanism is arranged in the second chamber.

3. The powertrain of claim 2, wherein The third planetary gear set (23) and the fourth planetary gear set (24) are arranged in close proximity in the second chamber.

4. The powertrain of claim 1, wherein A one-way clutch (5) is arranged between the drive shaft of the engine (11) and the carrier of the first planetary gear set (21).

5. The powertrain of claim 1, wherein The engaging steel sheet in the B1 brake (31) is arranged on the transmission housing (4), the sun gear of the third planetary gear set (23) and the sun gear of the fourth planetary gear set (24) are connected through a connecting piece, and the friction sheet in the B1 brake (31) is arranged on the connecting piece. And / or the engaging steel sheet in the B2 brake (32) is arranged on the transmission housing (4), and the friction sheet in the B2 brake (32) is arranged on the ring gear of the third planetary gear set (23).

6. The powertrain of claim 1, wherein A synchronizer is further included, the body of the synchronizer is arranged on the transmission housing (4), and the engaging structures at both ends of the synchronizer are the B1 brake (31) and the B2 brake (32) respectively.

7. A vehicle characterized by comprising: The power assembly comprises the power assembly according to any one of claims 1 to 6.

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