Hybrid system and vehicle

Abstract

This application provides a hybrid power system and a vehicle, including an engine; a generator, the output end of which is connected to the generator; a differential having two differential power output ends, each differential power output end being connected to a wheel on that side via a half-shaft; the output end of the generator being connected to the differential; a first drive assembly and a second drive assembly, respectively connected to the half-shafts of the two wheels to drive the wheels on both sides; and a power switching assembly, the first input end of which is connected to the engine, the second input end of which is connected to the generator, and the output end of which is connected to the differential. The power switching assembly includes at least one opening and closing device, which is used to selectively engage the engine, generator, and differential to achieve different power output modes to cope with different driving conditions, thereby optimizing the structure of the hybrid power system and reducing the overall vehicle cost.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a hybrid power system and a vehicle. Background Technology

[0002] A hybrid power system refers to a vehicle's power system that can use both fuel-powered and electric-powered drive. Its advantage is that the vehicle can use different power output methods to deal with different driving conditions, so that the engine can always keep in the best operating condition, resulting in good power performance and low emissions. However, existing hybrid power systems usually require multiple independent power output systems to achieve the purpose of dealing with different driving conditions with different power output methods, which leads to the complex structure and high cost of hybrid power systems. Utility Model Content

[0003] This application provides a hybrid power system and a vehicle to solve the problem that existing hybrid power systems usually require multiple independent power output systems to achieve the purpose of responding to different driving conditions with different power output modes, which leads to the complex structure and high cost of the hybrid power system.

[0004] In a first aspect, embodiments of this application provide a hybrid power system, including:

[0005] engine;

[0006] A generator, wherein the output of the engine is connected to the generator;

[0007] The differential has two differential power output terminals, each of which is connected to the wheel on that side via a half-shaft; the output terminal of the generator is connected to the differential.

[0008] The first drive assembly and the second drive assembly are respectively connected to the half-shafts of the two side wheels to drive the two side wheels respectively.

[0009] A power switching assembly, wherein a first input terminal of the power switching assembly is connected to the engine, a second input terminal of the power switching assembly is connected to the generator, and an output terminal of the power switching assembly is connected to the differential; wherein...

[0010] The power switching assembly includes at least one opening / closing device, wherein at least one opening / closing device is used to engage the engine and the generator; or

[0011] Engage the engine / generator and the differential; or

[0012] This connects the engine, the generator, and the differential.

[0013] In one embodiment, the power switching assembly includes a first opening / closing device and a second opening / closing device, the output end of the engine is connected to the input end of the second opening / closing device, the output end of the second opening / closing device and the output end of the generator are both connected to the input end of the first opening / closing device; the output end of the first opening / closing device is connected to the differential.

[0014] In one embodiment, the power switching assembly further includes a first gear and a second gear that mesh with each other, the first gear being connected to the output end of the first opening / closing device, and the second gear being connected to the differential.

[0015] In one embodiment, the power switching assembly includes a third opening / closing device, the output of the engine is connected to the input of the third opening / closing device, and the output of the third opening / closing device is connected to the differential.

[0016] In one embodiment, the power switching assembly includes a third gear and a fourth gear that mesh with each other. The third gear is connected to the output end of the engine, the fourth gear is connected to the input end of the third opening / closing device, and the output end of the third opening / closing device is connected to the differential.

[0017] In one embodiment, when the first opening and closing device and the second opening and closing device are closed, and the third opening and closing device is open, the gear transmission ratio of the engine direct drive is the number of teeth of the differential gear / the number of teeth of the first gear;

[0018] When the first opening and closing device and the second opening and closing device are disconnected, and the third opening and closing device is closed, the gear transmission ratio of the engine direct drive is = (number of teeth of the differential gear * number of teeth of the fourth gear) / (number of teeth of the second gear * number of teeth of the third gear).

[0019] In one embodiment, the opening and closing device is a clutch or a synchronizer.

[0020] In one embodiment, the first drive assembly includes a first drive motor and a second gear set connected to each other, and the second drive assembly includes a second drive motor and a second gear set connected to each other; wherein the first gear set and the second gear set are respectively connected to the wheels on both sides via half shafts.

[0021] In one embodiment, the two half-shafts on both sides of the differential are approximately the same length.

[0022] Secondly, embodiments of this application also provide a vehicle including any of the hybrid power systems described above.

[0023] The hybrid power system and vehicle provided in this application embodiment can selectively combine the engine, generator, and differential by setting a power switching component to cope with various operating conditions during vehicle operation. This achieves the goal of responding to different driving conditions with different power output modes with a simple and reliable structure, thus eliminating the need for multiple independent power output systems. This optimizes the structure of the hybrid power system, reduces the overall vehicle manufacturing cost, and further improves the stability of the vehicle during operation. Furthermore, in this embodiment, since the first and second input terminals of the power switching component are respectively connected to the engine and generator, meaning there are no other additional components between the engine / generator and the power switching component, power loss from the engine / generator can be effectively avoided when switching power output modes, ensuring the vehicle's power during operation. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the overall structure of a hybrid power system is provided for an embodiment of this application.

[0026] Figure 2 A schematic diagram of power transmission in the idling power generation mode of the hybrid power system is provided for the embodiments of this application.

[0027] Figure 3 A schematic diagram of power transmission in a hybrid power system in range-extending mode is provided for an embodiment of this application.

[0028] Figure 4 This application provides a schematic diagram of a first power transmission method for a hybrid power system in engine direct drive mode.

[0029] Figure 5 This application provides a schematic diagram of a second power transmission method for a hybrid power system in engine direct drive mode.

[0030] Figure 6 A schematic diagram of power transmission in a hybrid power system in generator direct drive mode is provided for an embodiment of this application.

[0031] Figure 7 This application provides a schematic diagram of power transmission in a hybrid power system operating in a mode where the engine and drive motor work together.

[0032] Figure 8This application provides a schematic diagram of power transmission in a hybrid power system operating in a mode where the generator and drive motor work together.

[0033] Figure 9 This application provides a schematic diagram of power transmission in a hybrid power system operating in a mode where the engine, generator, and drive motor work together.

[0034] Explanation of reference numerals in the attached figures:

[0035] 100. Hybrid power system;

[0036] 110. Engine;

[0037] 120. Generator;

[0038] 130. Differential; 131. Power output terminal of the first differential; 132. Power output terminal of the second differential; 133. Differential gear;

[0039] 141. First half-shaft; 142. Second half-shaft; 143. First wheel; 144. Second wheel; 145. First drive assembly; 1451. First drive motor; 1452. First gear set; 146. Second drive assembly; 1461. Second drive motor; 1462. Second gear set;

[0040] 150. Power switching assembly; 151. First opening and closing device; 152. Second opening and closing device; 153. Third opening and closing device; 154. Fourth opening and closing device; 155. First gear; 156. Second gear; 157. Third gear; 158. Fourth gear. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0042] This application provides a hybrid power system 100. Please refer to [link / reference]. Figure 1The hybrid power system 100 provided in this embodiment includes an engine 110, a generator 120, a differential 130, a first drive assembly 145, and a second drive assembly 146. The differential 130 has a first differential power output terminal 131 and a second differential power output terminal 132. The first differential power output terminal 131 is connected to a first wheel 143 via a first half-shaft 141, and the second differential power output terminal 132 is connected to a second wheel 144 via a second half-shaft 142. The output terminal of the engine 110 is connected to the generator 120, and the output terminal of the generator 120 is connected to the differential 130, thus enabling direct control of the first wheel 143 and the second wheel 144 via the differential 130. Simultaneously, the first drive assembly 145 is connected to the first wheel 143 via the first half-shaft 141, and the second drive assembly 146 is connected to the second wheel 144 via the second half-shaft 142. The first drive assembly 145 and the second drive assembly 146 can respectively drive the first wheel 143 and the second wheel 144.

[0043] For further information, please refer to [link / reference]. Figure 1 In the above embodiments, the hybrid power system 100 further includes a power switching component 150. The first input terminal of the power switching component 150 is connected to the engine 110, the second input terminal of the power switching component 150 is connected to the generator 120, and the output terminal of the power switching component 150 is connected to the differential 130. The power switching component 150 includes at least one opening and closing device, which is used to selectively combine the engine 110, the generator 120, and the differential 130. Through a simple and reliable structure, it can achieve the purpose of responding to different driving conditions with different power output modes, thereby eliminating the need to set up multiple independent power output systems, thus optimizing the structure of the hybrid power system 100, reducing the manufacturing cost of the whole vehicle, and further improving the stability of the whole vehicle during operation.

[0044] Specifically, the hybrid power system 100 in this embodiment can be divided into several power output modes, such as idle speed power generation mode, range extension mode, engine direct drive mode a, engine direct drive mode b, generator direct drive mode, engine and drive motor joint drive mode, generator and drive motor joint drive mode, and engine, generator and drive motor joint drive mode. The following is an explanation of how different power output modes are achieved through the opening and closing device.

[0045] Idle power generation mode: such as Figure 2 The arrow indicates the direction of power transmission. When the vehicle is stationary, the opening and closing device can control the engine 110 and generator 120 to engage, thereby generating electricity by outputting power from the engine 110 to the generator 120.

[0046] Range extender mode: such as Figure 3As indicated by the arrow, when the vehicle is in motion and in a power-off state, the first drive assembly 145 and the second drive assembly 146 can drive the first wheel 143 and the second wheel 144 respectively. At this time, the opening and closing device can control the engine 110 and the generator 120 to engage, and then generate electricity by outputting power from the engine 110 to the generator 120, thereby realizing the range extension mode of the vehicle.

[0047] Engine direct drive mode a: such as Figure 4 The arrow indicates the direction of power transmission. When the vehicle requires more stable output torque and power, the opening and closing device can control the engine 110 and the differential 130 to engage and connect the engine 110 and the differential 130, thereby outputting power from the engine 110 to the differential 130 to the wheels to achieve the first engine 110 direct drive mode.

[0048] Engine direct drive mode b: such as Figure 5 The arrows indicate the direction of power transmission. Compared to engine direct drive mode a, engine direct drive mode b uses the engagement or disengagement of the opening and closing device to make the power transmission route different. This allows for adjustments to the gear ratio to handle different driving conditions. Engine direct drive modes a and b will be explained in detail later.

[0049] Generator direct drive mode: such as Figure 6 The arrow indicates the direction of power transmission. At this time, the opening and closing device can control the generator 120 and the differential 130 to engage, and then output power from the generator 120 to the differential 130 to the wheels to realize the generator direct drive mode.

[0050] Engine and drive motor combined drive mode: such as Figure 7 In the direction of power transmission indicated by the arrow, the first drive assembly 145 and the second drive assembly 146 drive the first wheel 143 and the second wheel 144 respectively. At this time, the opening and closing device can control the engine 110 and the differential 130 to engage, thereby realizing the joint drive mode of the engine and the drive motor.

[0051] Generator and drive motor co-drive mode: such as Figure 8 In the direction of power transmission indicated by the arrow, the first drive assembly 145 and the second drive assembly 146 drive the first wheel 143 and the second wheel 144 respectively. At this time, the opening and closing device can control the generator 120 and the differential 130 to engage, thereby realizing the joint drive mode of the generator and the drive motor.

[0052] Engine, generator, and drive motor working together in a driving mode: such as Figure 9In the direction of power transmission indicated by the arrow, the first drive assembly 145 and the second drive assembly 146 drive the first wheel 143 and the second wheel 144 respectively. At this time, the opening and closing device can control the engine 110 and the differential 130 to engage, and control the generator 120 and the differential 130 to engage, thereby realizing the common drive mode of the engine, generator and drive motor.

[0053] In other embodiments of this application, the hybrid power system 100 may also include a pure electric mode, i.e., the first wheel 143 and the second wheel 144 are driven only by the first drive component 145 and the second drive component 146, respectively.

[0054] The hybrid power system 100 provided in this embodiment can selectively combine the engine 110, generator 120, and differential 130 by setting a power switching component 150 to cope with various operating conditions during vehicle operation. It achieves the purpose of responding to different driving conditions with different power output modes with a simple and reliable structure, thus eliminating the need for multiple independent power output systems. This optimizes the structure of the hybrid power system 100, reduces the overall vehicle manufacturing cost, and further improves the stability of the vehicle during operation. Furthermore, in this embodiment, since the first and second input terminals of the power switching component 150 are respectively connected to the engine 110 and generator 120, meaning there are no other additional components between the engine 110 / generator 120 and the power switching component 150, power loss in the engine 110 / generator 120 can be effectively avoided when switching power output modes, ensuring the vehicle's power during operation.

[0055] In some embodiments, such as Figure 4 As shown, the power switching assembly 150 includes a first opening / closing device 151 and a second opening / closing device 152 (exemplarily, the first opening / closing device 151 and the second opening / closing device 152 can be a clutch or a synchronizer). The output end of the engine 110 is connected to the input end of the second opening / closing device 152, and the output end of the second opening / closing device 152 and the output end of the generator are both connected to the input end of the first opening / closing device 151. The output end of the first opening / closing device 151 is connected to the differential 130. It can be understood that in this embodiment, when the first opening / closing device 151 and the second opening / closing device 152 are engaged simultaneously, the engine 110, the generator 120, and the differential 130 are connected in power. At this time, the power of the engine 110 can flow through the generator 120 and be transmitted to the differential 130 to achieve the purpose of driving the wheels (this power output mode is the engine direct drive mode a mentioned above).

[0056] It should be noted that when the second opening / closing device 152 is engaged and the first opening / closing device 151 is disengaged, the engine 110 is only powered by the generator 120 (e.g., Figure 2 and Figure 3 (As shown), thus realizing the vehicle's idle power generation mode or range-extending mode; when the first opening / closing device 151 is engaged and the second opening / closing device 152 is disengaged, the power between the engine 110 and the generator 120 is cut off, and the power of the engine 110 cannot flow through the generator 120 and be transmitted to the differential 130. At this time, only the power of the generator 120 can be transmitted to the differential 130 (as shown). Figure 6 , Figure 8 and Figure 9 (as shown), thereby realizing the generator 120 drive mode.

[0057] In some embodiments, such as Figure 5 As shown, the power switching assembly 150 includes a third opening / closing device 153 (the third opening / closing device 153 can be a clutch or a synchronizer), wherein the output terminal of the engine 110 is connected to the input terminal of the third opening / closing device 153, and the output terminal of the third opening / closing device 153 is connected to the differential 130. It can be understood that when the third opening / closing device 153 is closed, the power of the engine 110 can be transmitted to the differential 130 via the third opening / closing device 153 (e.g., ...). Figure 5 In the engine direct drive mode (b) shown, even if the first opening and closing device 151 and the second opening and closing device 152 are disconnected, the power of the engine 110 can still be transmitted to the differential 130.

[0058] Furthermore, such as Figure 4 and Figure 5 As shown, the power switching assembly 150 includes a first gear 155, a second gear 156, a third gear 157, and a fourth gear 158. The first gear 155 and the second gear 156 mesh with each other, and the first gear 155 is connected to the output end of the first opening and closing device 151. The second gear 156 meshes with the differential gear 133 of the differential 130 and transmits the power of the generator 120 to the differential 130. The third gear 157 and the fourth gear 158 mesh with each other, the third gear 157 is connected to the output end of the engine 110, and the fourth gear 158 is connected to the input end of the third opening and closing device 153. The output end of the third opening and closing device 153 is connected to the differential 130.

[0059] Specifically, when the first opening / closing device 151 and the second opening / closing device 152 are closed simultaneously, the power of the engine 110 can be transmitted to the differential 130 (this power output mode is the engine direct drive mode a mentioned above). At this time, the gear ratio of the direct drive of the engine 110 is i1 = the number of teeth of the differential gear 133 / the number of teeth of the first gear 155; while when the first opening / closing device 151 and the second opening / closing device 152 are open and the third opening / closing device 153 is closed (e.g. Figure 5As shown in the engine direct drive mode b), the gear ratio of the engine 110 direct drive is i2 = (number of teeth of differential gear 133 * number of teeth of fourth gear 158) / (number of teeth of second gear 156 * number of teeth of third gear 157). That is, compared with the engine 110 direct drive mode a, the engine 110 direct drive mode b controls the opening and closing of the opening and closing device, thereby making the power transmission line different, and then adjusts the gear ratio to cope with different driving conditions.

[0060] In some embodiments, such as Figure 3 As shown, the first drive assembly 145 includes a first drive motor 1451 and a first gear set 1452 connected to each other, and the second drive assembly 146 includes a second drive motor 1461 and a second gear set 1462 connected to each other. The first gear set 1452 and the second gear set 1462 are respectively connected to the first wheel 143 and the second wheel 144 through half shafts. It can be understood that this embodiment can realize the range-extended mode or pure electric mode of the vehicle by driving the first wheel 143 with the first drive motor 1451 and driving the second wheel 144 with the second drive motor 1461.

[0061] In some embodiments, such as Figure 1 As shown, the first half-shaft 141 and the second half-shaft 142 are approximately the same length, which allows the center of gravity of the hybrid power system 100 to be better located in the middle or near the middle of the axle, resulting in better stability and balance of the hybrid power system 100. At the same time, setting the first half-shaft 141 and the second half-shaft 142 to be approximately the same length can also improve the versatility of the half-shafts and reduce costs.

[0062] In other embodiments of this application, the hybrid power system 100 also has an off-road mode. When the first wheel 143 / second wheel 144 is suspended or slips, the driving force of the first drive motor 1451 / second drive motor 1461 can be used as power to drive the first wheel 143 / second wheel 144 to run, so as to achieve the off-road function.

[0063] Furthermore, in the above embodiments, the efficiency of getting out of trouble can be further improved and the goal of getting out of trouble can be achieved as soon as possible by controlling the generator 120 and the engine 110 to transmit power to the first wheel 143 / second wheel 144.

[0064] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0065] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0066] The hybrid power system and vehicle provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A hybrid powertrain system (100) characterized by, include: Engine (110); A generator (120) is provided, with the output of the engine (110) connected to the generator (120). The differential (130) has two differential power output terminals, each of which is connected to the wheel on that side via a half-shaft; the output terminal of the generator (120) is connected to the differential (130). The first drive assembly (145) and the second drive assembly (146) are respectively connected to the half-shafts of the two wheels to drive the two wheels respectively. A power switching assembly (150) has a first input terminal connected to the engine (110), a second input terminal connected to the generator (120), and an output terminal connected to the differential (130). The power switching assembly (150) includes at least one opening / closing device for engaging the engine (110) and the generator (120); or Engage the engine (110) / generator (120) and the differential (130); or The engine (110), the generator (120) and the differential (130) are combined.

2. The hybrid power system (100) according to claim 1, characterized in that, The power switching assembly (150) includes a first opening and closing device (151) and a second opening and closing device (152). The output end of the engine (110) is connected to the input end of the second opening and closing device (152). The output end of the second opening and closing device (152) and the output end of the generator are both connected to the input end of the first opening and closing device (151). The output end of the first opening and closing device (151) is connected to the differential (130).

3. The hybrid power system (100) according to claim 2, characterized in that, The power switching assembly (150) further includes a first gear (155) and a second gear (156) that mesh with each other. The first gear (155) is connected to the output end of the first opening and closing device (151), and the second gear (156) is connected to the differential (130).

4. The hybrid power system (100) according to claim 3, characterized in that, The power switching assembly (150) includes a third opening and closing device (153), the output end of the engine (110) is connected to the input end of the third opening and closing device (153), and the output end of the third opening and closing device (153) is connected to the differential (130).

5. The hybrid power system (100) according to claim 4, characterized in that, The power switching assembly (150) includes a third gear (157) and a fourth gear (158) that mesh with each other. The third gear (157) is connected to the output end of the engine (110), and the fourth gear (158) is connected to the input end of the third opening and closing device (153).

6. The hybrid power system (100) according to claim 5, characterized in that, When the first opening and closing device (151) and the second opening and closing device (152) are closed, and the third opening and closing device (153) is open, the gear transmission ratio of the direct drive of the engine (110) is i_1 = the number of teeth of the gear of the differential (130) / the number of teeth of the first gear (155). When the first opening and closing device (151) and the second opening and closing device (152) are disconnected and the third opening and closing device (153) is closed, the gear transmission ratio of the direct drive of the engine (110) is i_2 = [the number of teeth of the gear of the differential (130) * the number of teeth of the fourth gear (158)] / [the number of teeth of the second gear (156) * the number of teeth of the third gear (157)].

7. The hybrid power system (100) according to claim 1, characterized in that, The opening and closing device is a clutch or a synchronizer.

8. The hybrid power system (100) according to claim 1, characterized in that, The first drive assembly (145) includes a first drive motor (1451) and a first gear set (1452) connected to each other, and the second drive assembly (146) includes a second drive motor (1461) and a second gear set (1462) connected to each other; wherein the first gear set (1452) and the second gear set (1462) are respectively connected to the wheels on both sides via half shafts.

9. The hybrid power system (100) according to claim 1, characterized in that, The two half-shafts on both sides of the differential (130) are approximately the same length.

10. A vehicle, characterized in that, Includes the hybrid power system (100) as described in any one of claims 1-9.

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