Power system and vehicle

Abstract

A power system and a vehicle. The power system is used for providing power for a vehicle and comprises an engine (1), an electric motor (2), a transmission (3) and a flywheel (4), wherein one end of an electric motor shaft of the electric motor (2) is connected to an output shaft of the engine (1), and the other end of the electric motor shaft of the electric motor (2) is connected to an input shaft of the transmission (3); and the flywheel (4) is sleeved on the electric motor shaft of the electric motor (2).

Description

Powertrain and vehicles

[0001] This application claims priority to Chinese patent application No. 202322036507.X filed on July 31, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of vehicle technology, and in particular to a power system and a vehicle. Background Art

[0003] In the prior art, the powertrain of a hybrid vehicle typically includes an engine, an electric motor, and a transmission, all connected in sequence. The engine is connected to the electric motor via a clutch, enabling the engine and electric motor to jointly or independently output power to the transmission. In the prior art, when the electric motor outputs power to the transmission, the transmission load decreases during gear shifts. To prevent the motor's speed from increasing, the control center reduces the motor's input current. When the transmission shifts, the transmission load is restored, and the control center increases the motor's input current. Therefore, during the gear shift process, the motor's input current varies significantly, causing the motor's speed to vary significantly as well. This change in motor speed can easily impact the transmission, causing the vehicle to jerk or make unusual noises, impacting the driving experience. Technical issues

[0004] The present application provides a power system and a vehicle to solve or improve the defect of large changes in motor speed during transmission shifting in related technologies, thereby reducing the fluctuation of motor speed during transmission shifting. Technical Solutions

[0005] The present application provides a power system for providing power to a vehicle, the power system comprising an engine, a first clutch, a motor, a flywheel, a second clutch, and a manual transmission arranged in sequence;

[0006] In which, the output shaft of the engine is connected to one end of the motor shaft of the motor through the first clutch, the other end of the motor shaft of the motor is connected to the input shaft of the manual transmission, the flywheel is mounted on the motor shaft of the motor, and the flywheel is connected to the input shaft of the manual transmission through the second clutch.

[0007] According to a power system provided in the present application, the power system also includes a first clutch, and the output shaft of the engine is connected to the motor shaft of the motor through the first clutch, and the first clutch is used to engage or disconnect the output shaft of the engine with the motor shaft of the motor.

[0008] According to a power system provided by the present application, the flywheel of the power system is mounted on one end of the motor shaft of the motor close to the transmission, and the input shaft of the transmission is connected to the motor shaft of the motor through the flywheel.

[0009] According to a power system provided by the present application, the power system also includes a second clutch, the flywheel is connected to the input shaft of the transmission through the second clutch, and the second clutch is used to engage or disconnect the flywheel from the input shaft of the transmission.

[0010] According to a power system provided in the present application, the motor includes a main body, a first mounting cavity and a second mounting cavity, the first mounting cavity is connected to one end of the main body close to the transmission, the flywheel and the second clutch are both arranged in the first mounting cavity, the second mounting cavity is connected to one end of the main body close to the engine, and the first clutch is arranged in the second mounting cavity.

[0011] According to a power system provided by the present application, the power system further includes a first support beam, the first support beam is connected to the motor, and both ends of the first support beam are respectively used to connect to two longitudinal beams of the vehicle frame.

[0012] According to a power system provided by the present application, the power system further includes a second support beam, the second support beam is connected to the transmission, and both ends of the second support beam are respectively used to connect to the two longitudinal beams.

[0013] According to a power system provided in the present application, at least one of the first support beam and the second support beam includes a middle section and a pair of connecting seats, the pair of connecting seats are respectively detachably connected to the two ends of the middle section, the pair of connecting seats are respectively used to connect to the two longitudinal beams, and the middle section is connected to the motor or the transmission.

[0014] According to a power system provided in the present application, it also includes a suspension structure, and the two sides of the engine are respectively connected to the two longitudinal beams of the vehicle frame through the corresponding suspension structures, and the two sides of the transmission are respectively connected to the two longitudinal beams through the corresponding suspension structures.

[0015] According to a power system provided by the present application, two of the suspension structures are provided on both sides of the engine, and one of the suspension structures is provided on both sides of the transmission.

[0016] The present application also provides a vehicle, which includes the power system described above. Beneficial effects

[0017] The power system provided by the present application comprises an engine, a motor and a transmission connected in sequence. The engine can provide power to the motor and the transmission at the same time, or provide power to the transmission alone. The engine can also provide power to the transmission together with the motor. By arranging a flywheel on the motor shaft of the motor, the flywheel has a large inertia, so the flywheel can store more energy. After the input current of the motor suddenly decreases, the flywheel can release the stored energy to allow the motor to continue rotating, reducing the problem of the motor speed decreasing too quickly. After the input current of the motor suddenly increases, the flywheel can absorb part of the energy output by the motor, reducing the problem of the motor speed increasing too quickly, thereby reducing the impact of the motor on the transmission and making the power output of the power system more stable.

[0018] With such a configuration, the power system provided by the present application can utilize the flywheel to store part of the energy output by the motor, reduce the problem of the motor speed increasing too quickly, and release the stored energy when the motor speed decreases, reducing the problem of the motor speed decreasing too quickly, thereby achieving the effect of maintaining the motor speed stable, reducing the impact of the motor on the transmission, and making the power output of the power system smoother, thereby allowing the driver and passengers to have a better driving experience.

[0019] The vehicle provided in this application includes the power system provided in this application, and therefore also includes all the above-mentioned advantages of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] FIG1 is a schematic structural diagram of a power system provided in some embodiments of the present application;

[0022] FIG2 is an exploded view of the structure of a power system provided in some embodiments of the present application;

[0023] FIG3 is a schematic structural diagram of a motor provided in some embodiments of the present application;

[0024] FIG4 is a schematic structural diagram of a first support beam provided in some embodiments of the present application;

[0025] FIG5 is a schematic diagram of the three-dimensional structure of a first support beam provided in some embodiments of the present application;

[0026] FIG6 is a schematic structural diagram of a power system provided in some embodiments of the present application installed on a vehicle frame.

[0027] Reference numerals:

[0028] 1. Engine; 2. Motor; 201. Main body; 202. First installation cavity; 203. Second installation cavity; 204. Junction box; 3. Transmission; 4. Flywheel; 5. First clutch; 6. Second clutch; 7. First support beam; 701. Middle section; 702. Connecting seat; 8. Second support beam; 9. Suspension structure; 10. Longitudinal beam; 11. Clutch controller. Modes for Carrying Out the Invention

[0029] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0030] The power system provided in the embodiments of the present application is described below with reference to FIG. 1 to FIG. 6 .

[0031] Specifically, the power system is used to provide power for the vehicle, and the power system includes an engine 1 , a motor 2 , a transmission 3 and a flywheel 4 .

[0032] Engine 1 can be a fuel engine, such as a gasoline or diesel engine. One end of the motor shaft of motor 2 is connected to the output shaft of engine 1, and the other end of the motor shaft of motor 2 is connected to the input shaft of transmission 3. Flywheel 4 is mounted on the motor shaft of motor 2. Motor 2 is also connected to the power battery of the power system. When engine 1 drives motor 2 to generate electricity, the electricity generated by motor 2 is stored in the power battery. When motor 2 outputs power, the power battery provides electricity to motor 2.

[0033] In the power system provided in the embodiments of the present application, an engine 1, a motor 2, and a transmission 3 are connected in sequence. The engine 1 can simultaneously power the motor 2 and the transmission 3. That is, the engine 1 drives the motor 2 to rotate and generate electricity while also driving the transmission 3 to rotate. The motor 2 stores the generated electricity in the power battery. Alternatively, when the motor 2 is unloaded, the engine 1 alone powers the transmission 3. Of course, the engine 1 can also jointly power the transmission 3 with the motor 2, in which case the power battery supplies power to the motor 2.

[0034] By arranging the flywheel 4 on the motor shaft of the motor 2, the flywheel 4 has a large inertia and can therefore store a large amount of energy. When the input current of the motor 2 suddenly decreases, the flywheel 4 can release the stored energy to allow the motor 2 to continue rotating, reducing the problem of the motor 2 speed decreasing too quickly. When the input current of the motor 2 suddenly increases, the flywheel 4 can absorb part of the energy output by the motor 2, reducing the problem of the motor 2 speed increasing too quickly. This allows the motor 2 speed to remain stable, reduces the impact of the motor 2 on the transmission 3, ensures the smoothness of the motor 2 input to the transmission 3, and thus makes the power output of the power system more stable.

[0035] With such a configuration, the power system provided in the embodiment of the present application can utilize the flywheel 4 to store part of the energy output by the motor 2, thereby reducing the problem of the motor 2 speed increasing too quickly, and release the stored energy when the motor 2 speed decreases, thereby reducing the problem of the motor 2 speed decreasing too quickly, thereby achieving the effect of maintaining the motor 2 speed stable, reducing the impact of the motor 2 on the transmission 3, making the power output of the power system more stable, and thus allowing the driver and passengers to have a better driving experience.

[0036] In some embodiments provided in the present application, the power system also includes a first clutch 5, and the output shaft of the engine 1 is connected to the motor shaft of the motor 2 through the first clutch 5, and the first clutch 5 is used to engage or disconnect the output shaft of the engine 1 with the motor shaft of the motor 2.

[0037] In this embodiment, by setting a first clutch 5 between the output shaft of the engine 1 and the motor shaft of the motor 2, when the motor 2 alone provides power to the transmission 3, the first clutch 5 can be disconnected, thereby preventing the motor 2 from driving the engine 1 to idle, thereby reducing the energy consumption generated by the idling of the engine 1.

[0038] In one embodiment, the first clutch 5 is a normally open clutch.

[0039] In some embodiments provided herein, the flywheel 4 is mounted on one end of the motor shaft of the motor 2 near the transmission 3, and the input shaft of the transmission 3 is connected to the motor shaft of the motor 2 through the flywheel 4. Specifically, referring to FIG2 , the flywheel 4 is connected to the motor shaft of the motor 2, and the input shaft of the transmission 3 is connected to the flywheel 4.

[0040] 2 , in some embodiments provided herein, the power system further includes a second clutch 6. The flywheel 4 is connected to the input shaft of the transmission 3 via the second clutch 6, and the second clutch 6 is used to engage or disconnect the flywheel 4 from the input shaft of the transmission 3.

[0041] In this embodiment, a second clutch 6 is provided between the motor 2 and the transmission 3. When the engine 1 is solely driving the motor 2 to generate electricity, the flywheel 4 can be disconnected from the transmission 3 via the second clutch 6. This prevents the flywheel 4 from driving the transmission 3 to idle, thereby reducing the energy consumption caused by the idle rotation of the transmission 3. Furthermore, due to the larger area of ​​the flywheel 4, the second clutch 6 is more easily connected to the flywheel 4. This results in a simple connection structure between the flywheel 4 and the second clutch 6, making disassembly easy and improving the efficiency of powertrain maintenance.

[0042] With reference to Figures 2 and 3, in some embodiments provided in the present application, the motor 2 includes a main body 201, a first mounting cavity 202, and a second mounting cavity 203. The main body 201 includes a housing and a stator, a rotor, and a motor shaft disposed in the housing. The first mounting cavity 202 is connected to an end of the main body 201 close to the transmission 3, and the flywheel 4 is disposed in the first mounting cavity 202. Furthermore, the second clutch 6 is also mounted in the first mounting cavity 202. The second mounting cavity 203 is connected to an end of the main body 201 close to the engine 1, and the first clutch 5 is disposed in the second mounting cavity 203.

[0043] In this embodiment, a first mounting cavity 202 is provided at one end of the main body 201 to facilitate installation of the flywheel 4 and the second clutch 6, and the first mounting cavity 202 can also protect the flywheel 4 and the second clutch 6. A second mounting cavity 203 is provided at the other end of the main body 201 to facilitate installation of the first clutch 5, and the second mounting cavity 203 can also protect the first clutch 5.

[0044] In this embodiment, in the direction perpendicular to the motor shaft, the cross-sectional dimensions of the first mounting cavity 202 and the second mounting cavity 203 are both larger than the cross-sectional dimensions of the main body 201 , that is, the motor 2 as a whole is a dumbbell-shaped structure with thick ends and a thin middle.

[0045] With such an arrangement, the structure of the motor 2 is simple and compact. When the required power of the motor 2 changes, the rotor size and the stator size of the motor 2 need to be adjusted. Therefore, the cross-sectional size of the main body 201 is changed so that the main body 201 can accommodate the corresponding stator and rotor, and the sizes of the first mounting cavity 202 and the second mounting cavity 203 do not need to be changed, thereby facilitating the realization of product serialization and modularization, and reducing the cost of redeveloping the motor 2.

[0046] 1 and 6 , in some embodiments provided in the present application, the power system further includes a first support beam 7 , which is connected to the motor 2 , and the two ends of the first support beam 7 are respectively used to connect to the two longitudinal beams 10 of the vehicle frame.

[0047] As shown in FIG6 , because the power system includes an engine 1, a motor 2, and a transmission connected in sequence, the power system has a relatively large length along the length of the vehicle frame. Since the power system is disposed between the two longitudinal beams 10 of the vehicle frame, the portion of the vehicle frame used to mount the power system cannot be provided with a crossbeam, resulting in an uneven and irrational distribution of crossbeams between the two longitudinal beams 10 of the vehicle frame. In this embodiment, a first support beam 7 is used to connect the motor 2 and the pair of longitudinal beams 10 of the vehicle frame. This means that the first support beam 7 not only secures the motor 2 of the power system but also connects the pair of longitudinal beams 10, acting as a frame crossbeam, thereby increasing the connection strength of the pair of longitudinal beams 10 and improving the bending and torsional resistance of the vehicle frame.

[0048] In one embodiment, the first support beam 7 is connected to the top of the motor 2 to facilitate hoisting of the motor 2 .

[0049] In one embodiment, the first support beam 7 is arranged between the first mounting cavity 202 and the second mounting cavity 203, so as to avoid interference between the first mounting cavity 202 and the second mounting cavity 203 on the first support beam 7, so that the height of the first support beam 7 can be reduced, thereby increasing the space above the first support beam 7 to facilitate the installation of other components, thereby improving the space utilization above the frame.

[0050] Referring to Figures 1-3 , the motor 2 is further provided with a junction box 204 and a clutch controller 11 for controlling the first clutch 5. The clutch controller 11 is disposed outside the second mounting cavity 203, and the junction box 204 is disposed outside the first mounting cavity 202. The junction box 204, the clutch controller 11, and the first support beam 7 are installed at substantially the same height, thereby optimizing the layout of the power system and increasing the available space above the power system. The fact that the junction box 204, the clutch controller 11, and the first support beam 7 are installed at substantially the same height means that the height difference between the three is within a predetermined range.

[0051] In some embodiments provided in this application, the power system further includes a second support beam 8. The second support beam 8 is connected to the transmission 3, and both ends of the second support beam 8 are used to connect to the two longitudinal beams 10 respectively.

[0052] In this embodiment, the transmission 3 and a pair of longitudinal beams 10 of the frame can be connected through the second support beam 8, that is, the second support beam 8 can not only fix the transmission 3 of the power system and improve the overall stability of the power system, but also connect the pair of longitudinal beams 10 and play the role of frame cross beams, that is, along the length direction of the frame, the second support beam 8 and the first support beam 7 are distributed in the part of the frame used to install the power system, and the first support beam 7 and the second support beam 8 can both serve as cross beams of the frame, reducing the problem of uneven and unreasonable cross beam distribution between the two longitudinal beams 10 due to interference of the power system in related technologies, improving the connection strength of the pair of longitudinal beams 10 and improving the bending and torsional resistance of the frame.

[0053] In some embodiments provided herein, at least one of the first support beam 7 and the second support beam 8 includes a middle section 701 and a pair of connecting bases 702, wherein the pair of connecting bases 702 are detachably connected to both ends of the middle section 701. The pair of connecting bases 702 are respectively used to connect to the two longitudinal beams 10, and the middle section 701 is connected to the motor 2 or the transmission 3.

[0054] Referring to Figures 4 and 5 , taking the first support beam 7 as an example, the first support beam 7 includes a middle section 701 and removably mounted connecting blocks 702 at both ends of the middle section 701. During installation, the connecting blocks 702 can be mounted on the longitudinal beam 10, and then the power system can be installed. The middle section 701 of the first support beam 7 is then connected to the connecting blocks 702, making it easier to install the power system. The second support beam 8 is similar to the first support beam 7 and will not be described in detail.

[0055] As shown in Figure 5, in one embodiment, the middle section 701 is configured as a trough plate, with a connecting seat 702 extending into the interior of the trough plate. The two sides of the connecting seat 702 are connected to the two wings of the trough plate via corresponding fasteners. This configuration provides the middle section 701 with improved strength and bending resistance, thereby increasing the strength of the first support beam or the second support beam. In one embodiment, the fasteners are threaded fasteners such as bolts or screws.

[0056] In some embodiments provided herein, the power system further includes a suspension structure 9. Both sides of the engine 1 are connected to two longitudinal beams 10 via corresponding suspension structures 9, and both sides of the transmission 3 are connected to two longitudinal beams 10 via corresponding suspension structures 9.

[0057] In this embodiment, both sides of the engine 1 and both sides of the transmission 3 are connected to the longitudinal beam 10 through the suspension structure 9. From the overall perspective, the engine 1 and the transmission 3 are arranged at both ends of the power system, that is, the two ends of the power system are respectively connected to the longitudinal beam 10 through the corresponding suspension structure 9. In this way, the spacing between the suspension structures 9 is appropriate, so that the gravity and torque of the power system can be more evenly distributed on each suspension structure 9, thereby effectively reducing vibration and noise.

[0058] In one embodiment, two suspension structures 9 are provided on either side of the engine 1, and one suspension structure 9 is provided on either side of the transmission 3. This arrangement ensures a secure and reliable connection between the powertrain and the vehicle frame; the transmission suspension structure protects the powertrain in the event of severe vibration or system failure; and the appropriate suspension spacing ensures even distribution of gravity and torque loads, effectively reducing vibration and noise.

[0059] In one embodiment, the suspension structure 9 is a product in the related art, for example, its structure can refer to the existing engine 1 suspension or the existing motor 2 suspension.

[0060] In some embodiments provided herein, transmission 3 is a manual transmission. Since commercial vehicles often operate in complex road conditions such as mines and construction sites, a manual transmission allows the driver to operate the hybrid vehicle similarly to a gasoline vehicle, resulting in lower costs, better fuel efficiency, and reduced speed instability caused by frequent gear shifting in transmission 3.

[0061] A vehicle is also provided in an embodiment of the present application.

[0062] Specifically, the vehicle includes the power system described above.

[0063] In this embodiment, the vehicle includes a power system, and also includes all the above-mentioned advantages of the power system, which will not be described here.

[0064] It should be noted that the vehicles described in this application include but are not limited to commercial vehicles.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A power system, wherein: The power system is used to provide power for a vehicle, and comprises an engine (1), a first clutch (5), a motor (2), a flywheel (4), a second clutch (6) and a manual transmission (3) which are arranged in sequence; The output shaft of the engine (1) is connected to one end of the motor shaft of the motor (2) through the first clutch (5), the other end of the motor shaft of the motor (2) is connected to the input shaft of the manual transmission (3), the flywheel (4) is sleeved on the motor shaft of the motor (2), and the flywheel (4) is connected to the input shaft of the manual transmission (3) through the second clutch (6).

2. The power system according to claim 1, wherein: The first clutch (5) is used to connect or disconnect the output shaft of the engine (1) with the motor shaft of the motor (2).

3. The power system according to claim 1, wherein: The second clutch (6) is used to engage or disconnect the flywheel (4) with the input shaft of the transmission (3).

4. The power system according to claim 1, wherein: The motor (2) comprises a main body (201), a first mounting cavity (202) and a second mounting cavity (203); the first mounting cavity (202) is connected to an end of the main body (201) close to the transmission (3); the flywheel (4) and the second clutch (6) are both arranged in the first mounting cavity (202); the second mounting cavity (203) is connected to an end of the main body (201) close to the engine; and the first clutch (5) is arranged in the second mounting cavity (203).

5. The power system according to any one of claims 1 to 4, wherein: The power system further comprises a first support beam (7), the first support beam (7) being connected to the motor (2), and the two ends of the first support beam (7) being respectively used to be connected to two longitudinal beams (10) of the frame of the vehicle.

6. The power system according to claim 5, wherein: The power system further comprises a second support beam (8), the second support beam (8) being connected to the transmission (3), and the two ends of the second support beam (8) being respectively used to be connected to the two longitudinal beams (10).

7. The power system according to claim 6, wherein: At least one of the first support beam (7) and the second support beam (8) comprises a middle section (701) and a pair of connecting seats (702), wherein the pair of connecting seats (702) are respectively detachably connected to two ends of the middle section (701), and the pair of connecting seats (702) are respectively used to connect to the two longitudinal beams (10), and the middle section (701) is connected to the motor (2) or the transmission (3).

8. The power system according to any one of claims 1 to 4, wherein: The power system further comprises a suspension structure (9), the two sides of the engine (1) being connected to two longitudinal beams (10) of the vehicle frame via the corresponding suspension structures (9), and the two sides of the transmission (3) being connected to the two longitudinal beams (10) via the corresponding suspension structures (9).

9. The power system according to claim 8, wherein: Two suspension structures (9) are provided on both sides of the engine (1), and one suspension structure (9) is provided on both sides of the transmission (3).

10. A vehicle, wherein: The vehicle comprises a power system as claimed in any one of claims 1-9.

Images