Hybrid electric vehicle powertrain and vehicle

Abstract

The present disclosure relates to the technical field of hybrid vehicles, and more particularly to a hybrid vehicle powertrain and vehicle. The hybrid vehicle powertrain comprises: a first drive assembly, a second drive assembly, a transmission mechanism, and a C2 clutch; the transmission mechanism comprises a transmission mechanism input shaft, a transmission mechanism output shaft, a third planetary gear set, a B1 brake, and a C1 clutch; the sun gear of the third planetary gear set is connected to the transmission housing via the B1 brake, the sun gear of the third planetary gear set is connected to its ring gear via the C1 clutch, and the ring gear of the third planetary gear set is connected to the transmission mechanism input shaft. The hybrid vehicle powertrain, through the arrangement of the third planetary gear set, the B1 brake, and the C1 clutch, is capable of shifting gears, thereby providing greater torque output to the wheels at low vehicle speeds and greater speed output to the wheels at high vehicle speeds.

Description

Technical Field

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

[0002] Driven by energy and environmental pressures, as well as technological limitations, hybrid vehicles are increasingly favored by consumers and manufacturers. As a transitional solution to pure electric vehicles, hybrid vehicles combine the advantages of both traditional and pure electric vehicles, making them a highly practical new energy vehicle.

[0003] Nowadays, the usage scenarios of hybrid vehicles are becoming more and more complex. The vehicles need to be able to output power with high torque when climbing and starting, and also need to be able to output power at high speed. However, the transmission mechanism structure currently installed on hybrid vehicles is very complex, which will affect the volume of the entire powertrain, and then increase the difficulty of the vehicle parts layout. Summary of the Invention

[0004] In order to solve the above technical problems, the present disclosure provides a powertrain and a vehicle of a hybrid electric vehicle.

[0005] In a first aspect, the present disclosure provides a powertrain for a hybrid electric vehicle, comprising: a first drive assembly, a second drive assembly, a speed change mechanism, and a C2 clutch;

[0006] The speed change mechanism includes a speed change mechanism input shaft, a speed change mechanism output shaft, a third planetary gear, a B1 brake and a C1 clutch;

[0007] The sun gear of the third planetary gear set is connected to the transmission case via the B1 brake, the sun gear of the third planetary gear set is connected to its ring gear via the C1 clutch, the ring gear of the third planetary gear set is connected to the input shaft of the speed change mechanism, and the planet carrier of the third planetary gear set is connected to the output shaft of the speed change mechanism;

[0008] The first drive assembly is connected to the output shaft of the speed change mechanism, the second drive assembly is connected to the input shaft of the speed change mechanism, and the second drive assembly is connected to the output shaft of the speed change mechanism via the C2 clutch.

[0009] Optionally, the first driving assembly includes an engine, a first motor and a first planetary gear;

[0010] The transmission shaft of the engine is connected to the planetary carrier of the first planetary gear set, the transmission shaft of the first motor is connected to the sun gear of the first planetary gear set, and the ring gear of the first planetary gear set is connected to the output shaft of the speed change mechanism.

[0011] Optionally, the first drive assembly includes an engine, a first motor, a first planetary gear and a C0 clutch;

[0012] The transmission shaft of the engine is connected to the planetary carrier of the first planetary gear set, the transmission shaft of the engine is connected to the output shaft of the speed change mechanism through the C0 clutch, the transmission shaft of the first motor is connected to the sun gear of the first planetary gear set, and the ring gear of the first planetary gear set is connected to the transmission housing.

[0013] Optionally, the second drive assembly includes a second motor and a second planetary gear, the transmission shaft of the second motor is connected to the output shaft of the speed change mechanism, the sun gear of the second planetary gear is connected to the transmission shaft of the second motor, the planetary carrier of the second planetary gear is connected to the input shaft of the speed change mechanism, and the ring gear of the second planetary gear is connected to the transmission housing.

[0014] Optionally, the combined steel plate in the B1 brake is arranged on the transmission housing, and the friction plate in the B1 brake is arranged on the sun gear of the third planetary gear.

[0015] Optionally, a one-way clutch is provided between the transmission shaft of the engine and the planet carrier of the first planetary gear set.

[0016] In a second aspect, the present disclosure provides a vehicle comprising the powertrain of the hybrid vehicle as described above.

[0017] The technical solution provided by the embodiments of the present disclosure has the following advantages over the prior art:

[0018] The powertrain of the hybrid vehicle provided by the present disclosure can realize speed shifting through the arrangement of the third planetary gear, the B1 brake and the C1 clutch, thereby providing the vehicle with greater torque output to the wheels when traveling at low speeds, and also providing the vehicle with greater speed output to the wheels when traveling at high speeds; at the same time, it can also realize three output gears only through the arrangement of the C2 clutch, namely, the output gear of the first drive component, the output gear of the second drive component and the mixed output gear of the first drive component and the second drive component. The structure is very simple and the control is also simple. At the same time, when the vehicle is in the braking energy recovery state, it only needs to close the C2 clutch to enable the output shaft of the speed change mechanism to directly drive the second drive component to generate electricity, resulting in a short transmission path, low loss and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 present disclosure.

[0020] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 A schematic structural diagram of a powertrain of a hybrid vehicle according to an embodiment of the present disclosure;

[0022] Figure 2 is a schematic structural diagram of a powertrain of a hybrid vehicle according to another embodiment of the present disclosure;

[0023] Figure 3 The present invention is a schematic structural diagram of a hybrid vehicle powertrain equipped with a one-way clutch according to an embodiment of the present disclosure.

[0024] Among them, 11, engine; 12, first motor; 13, second motor; 21, first planetary gear; 22, second planetary gear; 23, third planetary gear; 31, B1 brake; 32, C1 clutch; 33, C2 clutch; 34, C0 clutch; 4, transmission case; 5, one-way clutch. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features therein can be combined with each other in the absence of conflict.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0027] Driven by energy and environmental pressures, as well as technological limitations, hybrid vehicles are increasingly favored by consumers and manufacturers. As a transitional solution to pure electric vehicles, hybrid vehicles combine the advantages of both traditional and pure electric vehicles, making them a highly practical new energy vehicle.

[0028] Nowadays, the usage scenarios of hybrid vehicles are becoming more and more complex. The vehicles need to be able to output power with high torque when climbing and starting, and also need to be able to output power at high speed. However, the transmission mechanism structure currently installed on hybrid vehicles is very complex, which will affect the volume of the entire powertrain, and then increase the difficulty of the vehicle parts layout.

[0029] Based on this, this embodiment provides a powertrain and vehicle of a hybrid electric vehicle. By setting the third planetary gear, B1 brake and C1 clutch, it is possible to realize the action of speed shifting, thereby providing the vehicle with greater torque output to the wheels when driving at low speed, and also providing the vehicle with greater speed output to the wheels when driving at high speed; at the same time, it is possible to realize three output gears only by setting the C2 clutch, namely the output gear of the first drive component, the output gear of the second drive component and the mixed output gear of the first drive component and the second drive component. The structure is very simple and the control is also simple. At the same time, when the vehicle is in the braking energy recovery state, it only needs to close the C2 clutch to make the output shaft of the speed change mechanism directly drive the second drive component to generate electricity, with a short transmission path, low loss and high efficiency. The following is a detailed description of this through specific embodiments:

[0030] Reference Figures 1 to 3 As shown, the powertrain of a hybrid vehicle provided in this embodiment includes: a first drive assembly, a second drive assembly, a speed change mechanism and a C2 clutch 33;

[0031] The speed change mechanism includes a speed change mechanism input shaft, a speed change mechanism output shaft, a third planetary gear 23, a B1 brake 31 and a C1 clutch 32; the sun gear of the third planetary gear 23 is connected to the transmission case 4 via the B1 brake 31, the sun gear of the third planetary gear 23 is connected to its ring gear via the C1 clutch 32, the ring gear of the third planetary gear 23 is connected to the speed change mechanism input shaft, and the planet carrier of the third planetary gear 23 is connected to the speed change mechanism output shaft; the first drive assembly is connected to the speed change mechanism output shaft, the second drive assembly is connected to the speed change mechanism input shaft, and the second drive assembly is connected to the speed change mechanism output shaft via the C2 clutch 33.

[0032] Among them, through the setting of the third planetary gear 23, the B1 brake 31 and the C1 clutch 32, the speed shifting action can be realized, thereby providing the vehicle with greater torque output to the wheels when traveling at low speed, and also providing the vehicle with greater speed output to the wheels when traveling at high speed; at the same time, only through the setting of the C2 clutch 33, three output gears can be realized, namely the first drive component output gear, the second drive component output gear and the first drive component and the second drive component mixed output gear. The structure is very simple and the control is also simple. At the same time, when the vehicle is in the braking energy recovery state, it only needs to close the C2 clutch 33 to enable the output shaft of the speed change mechanism to directly drive the second drive component to generate electricity, with a short transmission path, low loss and high efficiency.

[0033] Continue to refer to Figure 1As shown, the first drive assembly includes an engine 11, a first motor 12 and a first planetary gear 21; the drive shaft of the engine 11 is connected to the planetary carrier of the first planetary gear 21, the drive shaft of the first motor 12 is connected to the sun gear of the first planetary gear 21, and the ring gear of the first planetary gear 21 is connected to the output shaft of the speed change mechanism; the drive shaft of the second motor 13 is connected to the input shaft of the speed change mechanism; this arrangement can complete the speed regulation of the engine 11 through the first motor 12 when the power output mechanism is working, so that the engine 11 can always maintain an economic speed range when working, thereby improving the economy of the vehicle.

[0034] Continue to refer to Figure 2 As shown, the first drive assembly includes an engine 11, a first motor 12, a first planetary gear set 21 and a C0 clutch 34; the drive shaft of the engine 11 is connected to the planetary carrier of the first planetary gear set 21, the drive shaft of the engine 11 is connected to the output shaft of the speed change mechanism via the C0 clutch 34, the drive 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; by providing the C0 clutch 34, the power transmission path of the engine 11 and the first motor 12 can be disconnected when the second motor 13 is working alone, thereby reducing the difficulty of controlling the engine 11 and the first motor 12, making it easier to achieve the reverse driving action of the second motor 13 to drive the vehicle to reverse, and significantly reducing the cost of the entire power assembly.

[0035] Continue to refer to Figure 1 and Figure 2 As shown, the second drive assembly includes a second motor 13 and a second planetary row 22. The transmission shaft of the second motor 13 is connected to the output shaft of the speed change mechanism, the sun gear of the second planetary row 22 is connected to the transmission shaft of the second motor 13, the planetary carrier of the second planetary row 22 is connected to the input shaft of the speed change mechanism, and the ring gear of the second planetary row 22 is connected to the transmission housing 4. Through the arrangement of the second planetary row 22, the ring gear of the second planetary row 22 can be connected to the transmission housing 4, and the transmission shaft of the second motor 13 is connected to the sun gear of the second planetary row 22. By utilizing the output of the planetary carrier, the second motor 13 is provided with a speed reduction and torque increase effect when working, so that a second motor 13 with smaller torque can be selected, thereby further reducing the cost of the vehicle and reducing the space occupied by the powertrain.

[0036] In some embodiments, the bonding steel plate in the B1 brake 31 is arranged on the transmission housing 4, and the friction plate in the B1 brake 31 is arranged on the sun gear of the third planetary gear 23; it should be noted that since the material of the planetary gear structure 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 bonding steel plate is arranged on the aluminum alloy structure, which can prevent the transmission housing 4 from being deformed when the brake is performing a braking action. Moreover, the mass of the friction plate is lighter than the mass of the bonding steel plate, so the rotational inertia of the third planetary gear 23 is smaller during rotation, which will make the operation of the entire transmission mechanism more stable and reliable.

[0037] Continue to refer to Figure 3 As shown, a one-way clutch 5 is provided between the transmission shaft of the engine 11 and the planetary carrier of the first planetary gear 21; by providing 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 at the same time reducing the noise level of the entire vehicle.

[0038] In a second aspect, the present disclosure provides a vehicle comprising the powertrain of the hybrid vehicle as described above.

[0039] The specific implementation method and implementation principle are the same as those in the above embodiment, and can bring the same or similar technical effects, which will not be described here one by one. For details, please refer to the description of the powertrain embodiment of the above hybrid vehicle.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0041] The foregoing description is intended only to provide specific embodiments of the present disclosure, intended to enable those skilled in the art to understand and implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the embodiments described herein, but rather to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A powertrain for a hybrid vehicle, characterized in that: include: A first drive assembly, a second drive assembly, a speed change mechanism and a C2 clutch (33); The speed change mechanism comprises a speed change mechanism input shaft, a speed change mechanism output shaft, a third planetary gear (23), a B1 brake (31) and a C1 clutch (32); The sun gear of the third planetary row (23) is connected to the transmission housing (4) via the B1 brake (31), the sun gear of the third planetary row (23) is connected to its ring gear via the C1 clutch (32), the ring gear of the third planetary row (23) is connected to the input shaft of the speed change mechanism, and the planet carrier of the third planetary row (23) is connected to the output shaft of the speed change mechanism; The first drive assembly is connected to the output shaft of the transmission mechanism, the second drive assembly is connected to the input shaft of the transmission mechanism, and the second drive assembly is connected to the output shaft of the transmission mechanism via the C2 clutch (33); The second drive assembly comprises a second motor (13) and a second planetary gear (22), the transmission shaft of the second motor (13) is connected to the output shaft of the speed change mechanism, the sun gear of the second planetary gear (22) is connected to the transmission shaft of the second motor (13), and the planet carrier of the second planetary gear (22) is connected to the input shaft of the speed change mechanism; The first drive assembly comprises an engine (11), a first motor (12) and a first planetary gear (21); a transmission shaft of the engine (11) is connected to a planetary carrier of the first planetary gear (21), a transmission shaft of the first motor (12) is connected to a sun gear of the first planetary gear (21), and a ring gear of the first planetary gear (21) is connected to an output shaft of the speed change mechanism; Alternatively, the first drive assembly comprises an engine (11), a first motor (12), a first planetary gear (21) and a C0 clutch (34); the transmission shaft of the engine (11) is connected to the planetary carrier of the first planetary gear (21), the transmission shaft of the engine (11) is connected to the output shaft of the speed change mechanism via the C0 clutch (34), the transmission shaft of the first motor (12) is connected to the sun gear of the first planetary gear (21), and the ring gear of the first planetary gear (21) is connected to the transmission housing (4).

2. The hybrid vehicle powertrain according to claim 1, characterized in that: The ring gear of the second planetary gear (22) is connected to the transmission housing (4).

3. The hybrid vehicle powertrain according to claim 1, characterized in that: The combined steel plate in the B1 brake (31) is arranged on the transmission housing (4), and the friction plate in the B1 brake (31) is arranged on the sun gear of the third planetary gear (23).

4. The hybrid vehicle powertrain according to claim 1, wherein: A one-way clutch (5) is provided between the transmission shaft of the engine (11) and the planet carrier of the first planetary gear (21).

5. A vehicle, characterized in that: Comprising the powertrain according to any one of claims 1 to 4.

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