Hybrid power system and vehicle

Abstract

The utility model discloses a hybrid power system which comprises an engine, a first motor, a second motor and a third motor, the first motor is a generator, the engine and the second motor are connected with a speed change device, the speed change device is arranged to be connected with a front wheel, and the third motor is arranged to be used for driving a rear wheel. According to the hybrid power system, the four-wheel drive function can be achieved through a simple structure, the structure is simple, and maintenance is convenient. The utility model further discloses a vehicle.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobiles, and in particular relates to a hybrid power system and a vehicle. Background Art

[0002] With the development of new energy technologies, the current automobile drive types are complex, with oil-electric drive as the main driving scheme: pure fuel, pure electric, and hybrid power. The three schemes each have their own advantages and disadvantages.

[0003] Existing hybrid power systems are broadly classified into series, parallel, and hybrid. These three types are distinguished by the coupling method of the engine and motor energy reaching the wheel end.

[0004] As hybrid vehicles are currently performing in the market, consumers are prioritizing simple and low-cost hybrid systems. However, current hybrid systems still have drawbacks such as complex structures, complicated control strategies, inconvenient maintenance, and high costs.

[0005] Chinese patent application number 202280066345.X discloses a hybrid system capable of improving safety related to a secondary battery that supplies power to a motor generator. The hybrid system (10) includes: an electric generator (2); a secondary battery (50) provided as a driving power source for the electric generator (2) and supplying electric power to the electric generator (2); a positive-side contactor (75) for opening and closing a circuit (174) between a positive electrode (51) of the secondary battery (50) and the electric generator (2); a negative-side contactor (76) for opening and closing a circuit (175) between a negative electrode (52) of the secondary battery (50) and the electric generator (2); a first control unit (150) for controlling one of the positive-side contactor (75) and the negative-side contactor (76); and a second control unit (85) for controlling the other of the positive-side contactor (75) and the negative-side contactor (76) based on a control signal sent from the first control unit (150).

[0006] It is desirable to provide an improved hybrid power system, particularly with respect to how to achieve ease of maintenance. Utility Model Content

[0007] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a hybrid power system, the purpose of which is to facilitate maintenance.

[0008] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a hybrid power system, including an engine, a first motor, a second motor and a third motor, the first motor is a generator, the engine and the second motor are connected to a speed transmission device, the speed transmission device is configured to be connected to the front wheels, and the third motor is configured to drive the rear wheels.

[0009] The engine is connected to a first input shaft, the first input shaft is connected to a second input shaft via a clutch, and the second input shaft is connected to the speed change device.

[0010] The first motor is connected to the first input shaft through a first transmission mechanism.

[0011] The first transmission mechanism is a first-stage gear transmission mechanism.

[0012] When the hybrid power system operates in a pure electric mode, the engine and the first motor do not operate, and the second motor and / or the third motor operate to generate driving force.

[0013] When the hybrid power system operates in the series mode, the engine drives the first motor to operate, and the second motor and / or the third motor to operate to generate driving force.

[0014] When the hybrid power system operates in the parallel mode, the engine works with the second motor and / or the third motor to generate driving force.

[0015] The utility model also provides a vehicle, comprising the hybrid power system.

[0016] The hybrid power system of the utility model can realize the four-wheel drive function with a simple structure, and the simple structure can be conveniently maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] This manual includes the following drawings, which show the following contents:

[0018] Figure 1 It is a structural diagram of the hybrid power system of the utility model;

[0019] Marked in the figure: 1. First motor; 2. Second motor; 3. Third motor; 4. Engine; 5. First input shaft; 6. Second input shaft; 7. Clutch; 8. First transmission mechanism; 9. Power battery; 10. Front wheel; 11. Rear wheel; 12. Speed ​​transmission. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the specific implementation methods of the present invention by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and to facilitate its implementation.

[0021] It should be noted that in the following embodiments, the "first", "second" and "third" do not represent an absolute distinction in structure and / or function, nor do they represent a sequence of execution, but are merely for the convenience of description.

[0022] like Figure 1 As shown, the utility model provides a hybrid power system, including an engine 4, a first motor 1, a second motor 2 and a third motor 3, the first motor 1 is a generator, the engine 4 and the second motor 2 are connected to a speed change device 12, the speed change device 12 is configured to be connected to the front wheels 10, and the third motor 3 is configured to drive the rear wheels 11 to rotate the rear wheels 11.

[0023] Specifically, if Figure 1 As shown, the engine 4 is connected to a first input shaft 5, which is connected to a second input shaft 6 via a clutch 7. The second input shaft 6 is connected to a transmission 12. The clutch 7 is used to control the engagement and disengagement of the first and second input shafts 5 and 6. One end of the first input shaft 5 is connected to the output end of the engine 4, the other end of the first input shaft 5 is connected to one end of the clutch 7, one end of the second input shaft 6 is connected to the other end of the clutch 7, and the other end of the second input shaft 6 is connected to the input end of the transmission 12. When the clutch 7 is engaged, the power of the engine 4 can be transmitted to the transmission 12 via the first and second input shafts 5 and 6. The transmission 12 then transmits the power to the front wheels 10, driving the front wheels 10 to rotate, and the first and second input shafts 5 and 6 rotate synchronously. When the clutch 7 is disengaged, the power transmission between the first and second input shafts 5 and 6 is interrupted, and the first and second input shafts 5 and 6 cannot rotate synchronously.

[0024] like Figure 1 As shown, the first motor 1 is connected to the first input shaft 5 via a first transmission mechanism 8. In this embodiment, the first transmission mechanism 8 is a single-stage gear transmission mechanism. One gear of the first transmission mechanism 8 is fixedly connected to the first input shaft 5, and another gear of the first transmission mechanism 8 is fixedly connected to the motor shaft of the first motor 1.

[0025] like Figure 1 As shown, the motor shaft of the second motor 2 is connected to the input end of the speed change device 12 through the second transmission mechanism. The power of the second motor 2 is transmitted to the speed change device 12, and the speed change device 12 transmits the power to the front wheels 10, driving the front wheels 10 to rotate.

[0026] When the hybrid system operates in pure electric mode, the engine 4 and the first motor 1 are inoperative, while the second motor 2 and / or the third motor 3 are in operation, generating driving force to propel the vehicle. When the second motor 2 and the third motor 3 are in operation simultaneously, they both generate driving force, rotating the front wheels 10 and the rear wheels 11 of the vehicle, respectively, in which case the vehicle is in four-wheel drive mode. When the second motor 2 or the third motor 3 is in operation separately, the second motor 2 or the third motor 3 generates driving force, rotating only the front wheels 10 or the rear wheels 11 of the vehicle, in which case the vehicle is in two-wheel drive mode.

[0027] When the hybrid system operates in series mode, the engine 4 drives the first motor 1, which generates electricity to charge the power battery 9. The power battery 9 provides electrical energy to the second motor 2 and the third motor 3, which operate to generate driving force. When the second motor 2 and the third motor 3 are operating simultaneously, they both generate driving force, causing the front wheels 10 and the rear wheels 11 of the vehicle to rotate, respectively. In this case, the vehicle is in four-wheel drive mode. When the second motor 2 or the third motor 3 is operating separately, the second motor 2 or the third motor 3 generates driving force, causing only the front wheels 10 or the rear wheels 11 to rotate, and the vehicle is in two-wheel drive mode.

[0028] When the hybrid system operates in parallel mode, clutch 7 is engaged, and engine 4 operates in conjunction with second motor 2 and / or third motor 3 to generate driving force. When second motor 2 and third motor 3 operate simultaneously, engine 4, second motor 2, and third motor 3 simultaneously generate driving force, rotating the front wheels 10 and rear wheels 11 of the vehicle, respectively. At this point, the vehicle is in four-wheel drive mode, with power generated by engine 4 also transmitted to the front wheels 10. Simultaneously, engine 4 drives first motor 1, generating electricity. Alternatively, only second motor 2 or third motor 3 may be controlled to operate.

[0029] When the remaining power of the power battery 9 is greater than the set threshold soc dmin (the minimum power for pure electric drive), the vehicle speed is <80km / h, and the vehicle's required torque is < the current maximum output torque. At this time, it is pure electric mode, and the main control device is VCU (Vehicle Control Unit).

[0030] When the remaining power of the power battery 9 is less than 50%, the vehicle's required torque is less than the current maximum output torque.

[0031] When the accelerator is pressed deeply, the parking power generation is also in series mode. The main control device is VCU. The ECU (Engine Control Unit) receives the torque demand of VCU, and the engine 4 is used to drive the first motor 1 to work, and the first motor 1 generates electricity.

[0032] When the remaining power of the power battery 9 is less than the set threshold soc dmin When the vehicle speed is less than 80 km / h and the required torque of the vehicle is less than the current maximum output torque, it is in parallel mode. Engine 4 can directly participate in the drive. The main control device is VCU. After ECU receives the torque demand of VCU, engine 4 is used for power generation and direct drive.

[0033] The default mode is 2WD. 4WD can be enabled manually or when the vehicle's required torque exceeds the current maximum output torque or the slope exceeds the 4WD activation slope.

[0034] The hybrid power system of the above structure optimizes some structures and realizes the four-wheel drive function with a simple structure, which is convenient for later maintenance. The structural principle is simple, and the four-wheel drive function can be easily realized by adding a third motor 3. The third motor 3 is arranged on the rear axle of the vehicle to optimize the weight distribution of the front and rear axles of the vehicle and realize the four-wheel drive function. By reasonably setting the control logic, low energy consumption, strong power and high stability can be achieved.

[0035] The present invention also provides a vehicle comprising a hybrid power system of the above structure. Figure 1 Since the vehicle of the present invention includes the hybrid power system in the above embodiment, it has all the advantages of the above hybrid power system.

[0036] The above description of the present invention is provided as an example, in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any application of the above-described concepts and technical solutions of the present invention to other situations without modification, are all within the scope of protection of the present invention.

Claims

1. A hybrid power system comprising an engine, characterized in that: It also includes a first motor, a second motor and a third motor. The first motor is a generator. The engine and the second motor are connected to a speed change device. The speed change device is configured to be connected to the front wheels. The third motor is configured to drive the rear wheels.

2. The hybrid power system according to claim 1, characterized in that: The engine is connected to a first input shaft, the first input shaft is connected to a second input shaft via a clutch, and the second input shaft is connected to the speed change device.

3. The hybrid power system according to claim 2, characterized in that: The first motor is connected to the first input shaft through a first transmission mechanism.

4. The hybrid power system according to claim 3, characterized in that: The first transmission mechanism is a first-stage gear transmission mechanism.

5. The hybrid power system according to any one of claims 1 to 4, characterized in that: When the hybrid power system operates in a pure electric mode, the engine and the first motor do not operate, and the second motor and / or the third motor operate to generate driving force.

6. The hybrid power system according to any one of claims 1 to 4, characterized in that: When the hybrid power system operates in the series mode, the engine drives the first motor to operate, and the second motor and / or the third motor to operate to generate driving force.

7. The hybrid power system according to any one of claims 1 to 4, characterized in that: When the hybrid power system operates in the parallel mode, the engine works with the second motor and / or the third motor to generate driving force.

8. A vehicle, characterized in that: A hybrid power system comprising any one of claims 1 to 7.

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