[0029] The first embodiment of the present invention provides a hybrid power system, please refer to figure 1 , The hybrid power system includes: an engine 11, a first electric machine 12, a second electric machine 13, an output transmission gear set 14, a first torque transmission mechanism 15, a second torque transmission mechanism 16, a first planetary gear train 17 and The second planetary gear train 18.
[0030] The ring gear of the first planetary gear train 17 and the ring gear of the second planetary gear train 18 are coaxially arranged and connected as a whole;
[0031] The engine 11 is connected to the planet carrier of the first planetary gear train 17;
[0032] The output shaft of the first motor 12 is connected to the sun gear of the first planetary gear train 17;
[0033] The output shaft of the second motor 13 is connected to the sun gear of the second planetary gear train 18;
[0034] The output transmission gear set 14 is connected to the planet carrier of the second planetary gear train 18;
[0035] The first torque transmission mechanism 15 is arranged between the ring gear of the first planetary gear train 17 and the ring gear of the second planetary gear train 18 and the stationary component of the automobile;
[0036] The second torque transmission mechanism 16 is provided between the output shaft of the engine 11 and the output shaft of the first electric machine 12.
[0037] Specifically, the first electric machine 12 is a generator, the second electric machine 13 is a motor; or the first electric machine 12 is a motor, and the second electric machine 13 is a motor; or, the first electric machine 12 and The second electric machine 13 is a motor; alternatively, the first electric machine 12 and the second electric machine 13 are both generators. The first torque transmission mechanism 15 and the second torque transmission mechanism 16 may be clutches or brakes.
[0038] Further, the output shaft of the engine 11 may also be provided with a torsional vibration damping element to buffer and dampen the output of the engine 11. An input member may also be provided between the output shaft of the engine 11 and the planet carrier of the first planetary gear train 17. At this time, the second torque transmission mechanism 16 is provided between the input member and the first Between the output shafts of the motor 12. Wherein, the input member is a shafting element with splines.
[0039] Further, an output member may be provided between the output transmission gear set 14 and the planet carrier of the second planetary gear train 18. Wherein, the output member is a shafting element with a spline.
[0040] Further, the system may also be provided with an inverter and an energy storage device, and the first motor 12 and the second motor 13 are respectively connected to the inverter. The energy storage device includes a power battery and a battery management system that monitors and manages the power battery.
[0041] Specifically, the inverter can also be replaced with a controller with inverter function.
[0042] Please refer to Table 1. By controlling the separation and engagement of the first torque transmission mechanism 15 and the second torque transmission mechanism 16, combined with the shutdown or operation of the engine 11, the hybrid power system can be implemented in different driving modes or working modes. Switch between.
[0043] Table 1
[0044]
[0045]
[0046] This embodiment uses the first planetary gear train and the second planetary gear train to connect the engine, the first motor, the second motor, and the output transmission gear set, and controls the first planetary gear train and the second planetary gear train through the first torque transmission mechanism. The rotation of the ring gear of the planetary gear train is controlled by the second torque transmission mechanism to control the connection between the engine and the first motor, and the hybrid power system can be switched between different driving or working modes. In the pure electric mode, there is a larger transmission ratio between the second motor and the output transmission gear set, which can ensure better power performance.
[0047] The second embodiment of the present invention provides a hybrid power system, please refer to figure 2 , The hybrid power system includes: 21 engine, generator 22, motor 23, output transmission gear set 24, first torque transmission mechanism 25, second torque transmission mechanism 26, first planetary gear train, second planetary gear System, input member 29, output member 210, inverter 216 and energy storage device 217.
[0048] The first planetary gear train is provided with a first ring gear, a first sun gear 213 and a first planet carrier 212. The second planetary gear train is provided with a second ring gear, a second sun gear 215 and a second planet carrier 214. The first ring gear and the second ring gear are coaxially arranged and connected as a whole to form a ring gear assembly 211. The first torque transmission mechanism 25 is provided between the ring gear assembly 211 and the stationary member of the automobile. The first planet carrier 212 and the output shaft of the engine 21 are connected through an input member 29. The first sun gear 213 is connected to the output shaft of the generator 22. The second planet carrier 214 is connected to the output transmission gear set 24 through the output member 210. The second sun gear 215 is connected to the output shaft of the motor 23.
[0049] A second torque transmission mechanism 26 is provided between the output shaft of the generator 22 and the input member 29.
[0050] The inverter 16 is connected to the generator 22, the motor 23 and the energy storage device 17 respectively.
[0051] Please keep reading Figure 3 to Figure 6 (The solid arrow in the figure indicates the direction of transmission of mechanical energy, and the dashed arrow indicates the direction of transmission of electrical energy), the realization of each driving mode or working mode and power/energy flow is as follows:
[0052] Pure electric mode: such as image 3 As shown, when operating in this driving mode, the first torque transmission mechanism 25 is engaged to connect the ring gear assembly 211 with the stationary component of the automobile. At this time, the engine 21 and the generator 22 are both in the off state, and the second torque transmission mechanism 26 is separated. The electric energy provided by the energy storage device 217 is transmitted to the motor 23 via the inverter 216, and is converted into mechanical energy by the motor 23, and is input from the second sun gear 215, and the second planet carrier 214 is output to the output transmission gear set 24. At this time, the car is completely driven by the motor 23, and the power of the motor 23 is all derived from the energy storage device 217. Since the power of the motor 23 is input from the second sun gear 215 and the second planet carrier 214 is output, a larger transmission ratio can be achieved between the motor 23 and the output transmission gear set 24, thereby ensuring better power performance. In the pure electric mode, the first planetary gear set is not coupled with the second planetary gear set, and the speed of the engine 21 has nothing to do with the speed of the second planetary gear set. When the power of the energy storage device 217 drops, the engine 21 can be started to enter the series mode .
[0053] Series mode: such as Figure 4 As shown, this driving mode can also be called an extended range mode. When operating in this driving mode, the first torque transmission mechanism 25 is engaged to connect the ring gear assembly 211 with the stationary component of the automobile, and the second torque transmission mechanism 26 Separate. The engine 21 is started, and then the generator 22 is driven by the first frame 212 and the first sun gear 213 to generate electricity. The generated electric energy is supplied to the motor 23 through the inverter 216, and converted into mechanical energy, which is output to the second planetary gear train. Output transmission gear set 24. In this driving mode, the car is still independently driven by the motor 23, and the engine 21 drives the generator 22 to generate electricity, and the excess electric energy generated can also be used to charge the energy storage device 217 through the inverter 216, which is suitable for operation in low and medium operating conditions. In the extended range mode, the characteristic parameters of the first planetary gear train can be designed according to the high-efficiency speed ratio of the engine 21 and the generator 22, so as to ensure that both the engine 21 and the generator 22 can operate with high efficiency.
[0054] Hybrid drive mode: see Figure 5 When operating in this driving mode, the first torque transmission mechanism 25 is separated, the second torque transmission mechanism 26 is engaged, and the engine 21, the generator 22 and the motor 23 are all in working conditions. In this mode, part of the mechanical energy output by the engine 21 is coupled with the mechanical energy output by the motor 23 through the first planetary gear train and the second planetary gear train, and then output through the output transmission gear set 24, and the other part is output through the second torque transmission mechanism 26 It is output to the generator 22, converted into electric energy by the generator 22, and then transmitted to the energy storage device 217 via the inverter 216. In this driving mode, the second torque transmission mechanism 26 is engaged to connect the engine 21 and the generator 22 to form a torque coupling, while the second planetary gear set forms a rotational speed coupling to adjust the rotational speed of the engine 21 to maintain the high efficiency of the engine 21 The problem of insufficient torque output in this drive mode is avoided while running.
[0055] Neutral mode: In this mode, the first torque transmission mechanism 25 is engaged, the second torque transmission mechanism 26 is disengaged, the engine 21 is in the off state, and no power/energy flows.
[0056] Neutral power generation mode: see Image 6 In this mode, the car is stationary, the first torque transmission mechanism 25 is engaged, and the second torque transmission mechanism 26 is disengaged. At this time, the generator 21 is running, and the output mechanical energy is transmitted to the generator 22 through the first planetary gear train, converted into electrical energy by the generator 22, and stored in the energy storage device 217 via the inverter 216.
[0057] This embodiment uses two parallel planetary gear sets to connect the engine, generator and motor, and uses the motion characteristics of the planetary gear structure to achieve independent control of the speed of the engine, generator and motor, and by controlling the first torque transmission The engagement or separation of the mechanism and the second torque transmission mechanism establishes different driving modes, and the switching operation between the different driving modes is relatively simple. In the pure electric mode, there is a larger transmission ratio between the motor and the output transmission gear set, which can ensure better power performance; in the series mode, the transmission ratio of the first planetary gear set can be designed to make the engine and the motor equal High-efficiency operation; in the hybrid drive mode, the second torque transmission mechanism is engaged to connect the engine and the generator together to form a torque coupling, while the second planetary gear set forms a speed coupling to adjust the engine speed to keep the engine running efficiently At the same time, the problem of insufficient torque output in hybrid drive mode is avoided.
[0058] The third embodiment of the present invention provides a hybrid power system, please refer to Figure 7 , The hybrid power system includes: an engine 71, a first motor 72, a second motor 73, an output transmission gear set 74, a first torque transmission mechanism 75, a second torque transmission mechanism 76, a first planetary gear train, a first Two planetary gear trains, an input member 79, an output member 710, a controller 716 with inverter function, and an energy storage device 717.
[0059] The first planetary gear train is provided with a first ring gear, a first sun gear 715 and a first planet carrier 712. The second planetary gear train is provided with a second ring gear, a second sun gear 715 and a second planet carrier 714. The first ring gear and the second ring gear are coaxially arranged and connected as a whole to form a ring gear assembly 711. The first torque transmission mechanism 75 is provided between the ring gear assembly 711 and the stationary member of the automobile. The first planet carrier 712 is connected to the output shaft of the engine 72 through an input member 79. The first sun gear 713 is connected to the output shaft of the first motor 72. The second planet carrier 714 and the output transmission gear set 74 are connected through the output member 710. The second sun gear 715 is connected to the output shaft of the second motor 73.
[0060] A second torque transmission mechanism 76 is provided between the output shaft of the first motor 72 and the input member 79.
[0061] The controller 716 is respectively connected to the first motor 72, the second motor 73 and the energy storage device 717.
[0062] Please keep reading Picture 8 and Picture 9 (The solid arrow in the figure indicates the direction of transmission of mechanical energy, and the dashed arrow indicates the direction of transmission of electrical energy), the realization of each driving mode or working mode and power/energy flow is as follows:
[0063] Pure electric mode: such as Picture 8 As shown, when operating in this driving mode, the first torque transmission mechanism 75 is engaged to connect the ring gear assembly 711 with the stationary component of the automobile. At this time, the engine 71 and the first motor 72 are both in the off state, and the second torque transmission mechanism 76 is disconnected or engaged. The electrical energy provided by the energy storage device 717 is transmitted to the second motor 73 via the controller 716, and converted into mechanical energy by the second motor 73, which is input from the second sun gear 715, and the second planet carrier 714 is output to the output transmission gear set 74. At this time, the car is completely driven by the second motor 73, and the power of the second motor 73 is all derived from the energy storage device 717. Since the power of the second motor 73 is input from the second sun gear 715 and the second planet carrier 714 is output, a larger transmission ratio can be achieved between the second motor 73 and the output transmission gear set 74, thereby ensuring better power performance .
[0064] Hybrid drive mode: see Picture 9 When operating in this driving mode, the first torque transmission mechanism 75 is separated, the second torque transmission mechanism 76 is engaged, and the engine 71, the first motor 72 and the second motor 73 are all in working conditions. At this time, the electrical energy provided by the energy storage device 717 passes through the controller 716 with inverter function, and simultaneously drives the first motor 72 and the second motor 73 to output mechanical energy, wherein the mechanical energy output by the first motor 72 and the mechanical energy output by the engine 71 The mechanical energy output by the first planetary gear train and the second planetary gear train and the second motor 73 are coupled and output through the output transmission gear set 74. In this driving mode, the second torque transmission mechanism 76 is engaged to connect the engine 71 and the first motor 72 to form a torque coupling, while the second planetary gear set forms a rotational speed coupling to adjust the rotational speed of the engine 71, while maintaining the engine 71 The high-efficiency operation avoids the problem of insufficient torque output in this drive mode.
[0065] Neutral mode: In this mode, the first torque transmission mechanism 75 is engaged, the second torque transmission mechanism 76 is disengaged, the engine 71 is in the off state, and no power/energy flows.
[0066] The hybrid power system of this embodiment uses two parallel planetary gear trains to connect the engine, the first motor, and the second motor, and uses the motion characteristics of the planetary gear train structure to achieve the speed of the engine, the first motor, and the second motor. Independent control, realizes different driving modes by controlling the engagement or disengagement of the first torque transmission mechanism and the second torque transmission mechanism, and the switching operation between different driving modes is relatively simple. In the pure electric mode, there is a larger transmission ratio between the second motor and the output transmission gear set, which can ensure better power performance; in the hybrid drive mode, the second torque transmission mechanism engages the engine and the first motor Connected together to form a torque coupling, and the second planetary gear set forms a rotational speed coupling to adjust the engine speed, which avoids the problem of insufficient torque output in the hybrid drive mode while maintaining the efficient operation of the engine.
[0067] Specifically, in the hybrid power system of the present invention, the first motor may be a motor and the second motor may be a generator, or both the first motor and the second motor may be motors, or both the first motor and the second motor may be generators. The working mode and power/energy flow are similar to those in this embodiment, and will not be repeated here.
[0068] The fourth embodiment of the present invention provides an automobile adopting a hybrid power system, please refer to Picture 10 The automobile includes a driving wheel 103, a driving axle 102 connected to the driving wheel 103, and a hybrid power system 101.
[0069] The hybrid power system 101 may adopt the hybrid power system provided in the above-mentioned embodiments, which will not be repeated here.
[0070] The output transmission gear set of the hybrid power system 101 is connected to the drive axle 102 for outputting the power generated by the hybrid power system 101 to the drive axle 102, and the drive axle 102 drives the driving wheels 103 of the automobile.
[0071] In the automobile of this embodiment, the engine, the first motor and the second motor are connected through the first planetary gear train and the second planetary gear train of the hybrid power system, and the motion characteristics of the planetary gear train are used to realize the engine, generator and drive motor The three speeds are controlled independently, and by controlling the separation or engagement of the first torque transmission mechanism and the second torque transmission mechanism, different driving modes are realized, and the switching operation between the different driving modes is relatively simple.
[0072] In summary, the hybrid power system provided by the present invention and the automobile using the hybrid power system connect the engine, the first motor and the second motor through the first planetary gear train and the second planetary gear train arranged in parallel, and use The motion characteristics of the planetary gear train realize independent control of the speed of the engine, the first motor and the second motor. By controlling the engagement and separation of the first torque transmission mechanism and the second torque transmission mechanism, different driving or work can be realized Switching between modes, so the switching operation between the modes of the hybrid power system is relatively simple. At the same time, since the power of the second motor is input from the sun gear of the second planetary gear train and the planet carrier is output, a larger transmission ratio can be achieved between the second motor and the driving wheels. Therefore, the hybrid power system has a better performance in pure electric mode. Good power performance. At the same time, the characteristic parameters of the first planetary gear train are designed according to the high-efficiency speed ratio of the engine and the first motor, so it can ensure that both the engine and the first motor can operate at high efficiency, which can minimize fuel consumption and emissions.
[0073] The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. Those skilled in the art can implement the present invention with many modifications without departing from the scope and essence of the present invention. For example, features shown or described as part of one embodiment can be used in another embodiment to yield yet another embodiment. The above are only preferred and feasible embodiments of the present invention, and are not therefore limited to the scope of rights of the present invention. All equivalent changes made by using the content of the description and drawings of the present invention are included in the scope of rights of the present invention.
