Dual-motor automatic range-extending hybrid drive system and automobile using same

Abstract

The application belongs to the technical field of vehicle hybrid power system, and particularly relates to a dual-motor automatic gear range-extending hybrid drive system and an automobile using the system, which comprises an engine, a generator and an electric motor, the engine output shaft is connected with one end of a generator main shaft, the other end of the generator main shaft is arranged in an electric main shaft, and the two are coaxially arranged, the generator main shaft and the electric main shaft are respectively rotationally connected with an electric coupling gearbox, and the electric coupling gearbox is used for connecting a power output shaft; the electric coupling gearbox comprises a gear position executing mechanism, a mode switching mechanism and a gearbox intermediate shaft connected with them; the gear position executing mechanism realizes connection or disconnection of the electric main shaft and the power output shaft; and the mode switching mechanism realizes connection or disconnection of the generator main shaft and the power output shaft. The application realizes various driving modes, reduces energy consumption of pure motor driving at high speed, increases power followability and climbing performance, matches the speed ratio of the engine and the generator, and has compact, reliable system structure and efficient power transmission.

Description

Technical Field

[0001] This application belongs to the field of vehicle hybrid power system technology, and in particular relates to a dual-motor automatic transmission range-extended hybrid drive system and a vehicle using the system. Background Technology

[0002] Electric vehicles, as a new energy mode of transportation, are characterized by low noise, high energy efficiency, and no mobile waste emissions. Energy supply is a crucial link in the electric vehicle industry chain, and the energy supply model is closely related to the development of electric vehicles. Range-extended electric vehicles (REEVs) automatically activate their range extenders to continue providing power when the onboard battery is low. REEVs require only about 40% of the battery capacity of pure electric vehicles, feature direct-drive motors, and have no clutch or gearbox, resulting in a simple structure.

[0003] Currently, there are some problems with the power systems of range-extended electric vehicles on the market, for example, Figure 1 As shown, the generator, motor, and battery are electrically connected. The battery pack provides power to the motor, which then drives the wheels of the range-extended electric vehicle via the main reducer. The engine and generator are connected via a transmission. When the battery is nearly depleted, the engine provides mechanical energy to the generator, which maintains optimal torque operation and outputs a fixed power of electrical energy. This energy is then supplied to the motor, which in turn drives the wheels of the range-extended electric vehicle via the main reducer. Here, the engine is only used to drive the generator rotor to provide power to the battery. Pure electric motor drive at high speeds suffers from high energy consumption, insufficient power response, low speed, difficulty climbing hills, and insufficient power. Currently, most hybrid range-extended power systems use planetary gear mechanisms, which are complex to manufacture. Mismatched engine and generator speed ratios result in single-speed output, making it difficult to adapt to various operating conditions and preventing optimal power and efficiency. An unreasonable layout of the motor and generator can lead to excessive space occupied by the power system. Summary of the Invention

[0004] To reduce energy consumption during high-speed pure electric drive, increase power responsiveness, and enhance hill-climbing performance, this application provides a dual-motor automatic range-extended hybrid drive system. This system aims to match the speed ratio of the engine and generator, and optimize the layout of the electric motor and generator to minimize space requirements.

[0005] In the first aspect, this application provides a dual-motor automatic transmission range-extended hybrid drive system, which is implemented using the following technical solution.

[0006] The double-motor automatic gear range-extending hybrid drive system comprises an engine, a generator and a motor, the engine output shaft is connected with one end of a generator main shaft through a generator gear box, the other end of the generator main shaft is arranged in a motor main shaft, and the two are coaxially arranged, the generator main shaft and the motor main shaft are rotationally connected with a motor coupling gearbox, and the motor coupling gearbox is used for connecting a power output shaft.

[0007] At least two gears transmitting power to each other are arranged in the generator gear box, the engine output shaft is connected with one gear in the generator gear box, and the other gear in the generator gear box is connected with the generator main shaft.

[0008] The motor coupling gearbox comprises a gear position execution mechanism, a mode switching mechanism and a gearbox intermediate shaft connecting the gear position execution mechanism and the mode switching mechanism.

[0009] The gear position execution mechanism realizes the connection or disconnection of the motor main shaft and the power output shaft.

[0010] The mode switching mechanism realizes the connection or disconnection of the generator main shaft and the power output shaft.

[0011] The gear position execution mechanism comprises at least one motor movable gear sleeve connected with the motor main shaft, and at least two gears matched with the motor movable gear sleeve and transmitting power to the power output shaft.

[0012] The mode switching mechanism comprises at least one generator movable gear sleeve connected with the generator main shaft, and at least one pair of gear sets matched with the generator movable gear sleeve and transmitting power to the power output shaft.

[0013] By adopting the above technical scheme, pure electric drive, pure oil drive, hybrid power generation and hybrid drive, idling power generation and brake mass recovery and other modes are realized, and the generator gear box plays a power conversion role between the engine and the power generation assembly.

[0014] Preferably, the gear position execution mechanism comprises one motor movable gear sleeve connected with the motor main shaft, one pair of externally meshing gear low-speed gears and one pair of externally meshing gear high-speed gears.

[0015] Among them:

[0016] One gear low-speed gear is a driving gear low-speed gear, which can be matched with the motor movable gear sleeve, and the other is a driven gear low-speed gear, which is connected with the gearbox intermediate shaft.

[0017] One gear high-speed gear is a driving gear high-speed gear, which can be matched with the motor movable gear sleeve, and the other is a driven gear high-speed gear, which is connected with the gearbox intermediate shaft.

[0018] By adopting the technical scheme, the electric main shaft can be connected to the power output shaft in two gears respectively.

[0019] Preferably, the mode switching mechanism comprises a power generation movable gear sleeve connected to the power generation main shaft, a pair of externally meshing mode low-speed gears, and a pair of externally meshing mode high-speed gears.

[0020] Preferably, the mode switching mechanism comprises a power generation movable gear sleeve connected to the power generation main shaft, a pair of externally meshing mode low-speed gears, and a pair of externally meshing mode high-speed gears.

[0021] One mode low-speed gear is a driving mode low-speed gear, which can be matched with the power generation movable gear sleeve, and the other is a driven mode low-speed gear, which is connected to the intermediate shaft of the gearbox.

[0022] One mode low-speed gear is a driving mode low-speed gear, which can be matched with the power generation movable gear sleeve, and the other is a driven mode low-speed gear, which is connected to the intermediate shaft of the gearbox.

[0023] By adopting the technical scheme, the electric main shaft can be connected to the power output shaft in two gears respectively.

[0024] Preferably, the electric coupling gearbox is provided with a gear control mechanism and a mode control mechanism, the gear control mechanism controls the motion state of the gear execution mechanism, and the mode control mechanism controls the motion state of the mode switching mechanism.

[0025] By adopting the technical scheme, the connection relationship between the power generation main shaft and the electric main shaft and the power output shaft is controlled.

[0026] Preferably, the gear control mechanism comprises a gear driving motor, a gear transmission member, a gear shifting knob connected to the gear transmission member, and a gear shifting fork matched with the gear shifting knob.

[0027] By adopting the technical scheme, the output gear control of the engine shaft is realized.

[0028] Preferably, the mode control mechanism comprises a mode driving motor, a mode transmission member, a mode shifting knob connected to the mode transmission member, and a mode shifting fork matched with the mode shifting knob.

[0029] By adopting the technical scheme, the output gear control of the power generation main shaft is realized.

[0030] In a second aspect, the application provides a car using the above-mentioned dual-motor automatic gear range-extending hybrid drive system.

[0031] By adopting the technical scheme, the car using the drive mechanism can realize various driving modes, enhance the power flexibility and climbing performance, and optimize the high-speed cruising and acceleration performance.

[0032] In summary, the application includes the following at least beneficial technical effects:

[0033] 1. In the traditional gear set layout at both ends of the motor generator gearbox and electric coupling gearbox, and using different transmission ratios, pure electric drive, pure oil drive, hybrid power generation and hybrid drive, idling power generation, neutral coasting and brake energy recovery, etc. Multiple working modes are realized. The traditional gear set has simple machining process, avoids the use of complex planetary gear mechanism, and reduces cost.

[0034] 2. The engine passes through the multi-gear high-efficiency power output power of the generator gearbox and the electric coupling gearbox, reduces the energy consumption of the pure motor drive of the car at high speed output, realizes energy saving and emission reduction; Through the different movement directions of the motor movable gear sleeve on the motor shaft, the multi-gear power output of the motor is realized, the power following property is increased, the climbing performance of the car is enhanced, and the high-speed cruising and acceleration performance is optimized; The two gears of the generator gearbox and the four gears of the electric coupling gearbox can realize the selection and replacement of the two gears of the generator, the two gears of the motor and the four gears of the engine. Similarly, increasing more movable gear sleeves, transmission gear sets and related control mechanisms can meet the demand of matching more speed ratios of the engine and the generator.

[0035] 3. The engine, generator and motor are concentric shaft power output, the overall power structure is compact, and the power transmission is efficient; The radial space occupation is small, which fully meets the space requirements of rear-drive vehicles, and is extremely suitable for application in rear-drive vehicles.

[0036] 4. The gear control mechanism and mode control mechanism with driving motor and sensor realize the full-automatic switching of motor and engine power and gear switching, and realize the automatic conversion of engine and generator energy. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is the working block diagram of the current electric vehicle drive system.

[0038] Figure 2 is the working block diagram of the drive system of example 1.

[0039] Figure 3 is the composition diagram of the drive system of example 1.

[0040] Figure 4 is the principle diagram of the drive system of example 1.

[0041] Figure 5 is the structure schematic diagram of the drive system of example 1.

[0042] Figure 6 is the gear set diagram of the electric coupling gearbox of example 1.

[0043] Figure 7 is the structure diagram of the gear control mechanism and mode control mechanism of example 1.

[0044] Figure 8 is the working schematic diagram of the gear shift fork and mode shift fork of embodiment 1.

[0045] Figure 9 is the schematic diagram of the drive system mechanism of embodiment 2.

[0046] Legend: 1, engine; 11, engine output shaft; 2, power generation gear box; 21, first box gear; 22, second box gear; 23, third box gear; 24, fourth box gear; 25, gear box intermediate shaft; 26, gear box movable gear sleeve; 27, gear box sensor; 3, generator; 31, power generation main shaft; 311, power generation movable gear sleeve; 32, power generation stator; 33, power generation rotor; 4, electric motor; 41, electric motor main shaft; 411, electric motor movable gear sleeve; 42, electric motor stator; 43, electric motor rotor; 5, electric coupling gear box; 51, power output shaft; 52, gear box intermediate shaft; 53, gear shift actuator; 531, main gear low speed gear; 532, driven gear low speed gear; 533, main gear high speed gear; 534, driven gear high speed gear; 54, mode switching mechanism; 541, main mode low speed gear; 542, driven mode low speed gear; 543, main mode high speed gear; 544, driven mode high speed gear; 55, gear control mechanism; 551, gear drive motor; 552, gear transmission part; 553, gear shift head; 554, gear shift fork; 555, gear sensor; 56, mode control mechanism; 561, mode drive motor; 562, mode transmission part; 563, mode shift head; 564, mode shift fork; 565, mode sensor; 57, support shaft. DETAILED DESCRIPTION

[0047] The following will be described in detail below in combination with the Figures 1-8 The present application will be described in further detail.

[0048] Embodiment 1

[0049] Embodiment 1 of the present application discloses a dual-motor four-gear extended-range hybrid drive system.

[0050] Referring to Figure 2 , the dual-motor automatic gear extended-range hybrid drive system comprises an engine 1, a power generation gear box, a generator 3, an electric motor 4, and an electric coupling gear box 5. The electric motor 4 is transmitted to the differential rear axle through the electric coupling gear box 5. The generator 3 is connected with the engine 1 through the power generation gear box. The generator 3 can drive the engine 1 to start, and the engine 1 can also drive the generator 3 to generate electricity. The engine 1 can be directly transmitted to the electric coupling gear box 5 through the power generation gear box, and the electric coupling gear box 5 is transmitted to the differential rear axle of the extended-range electric vehicle, so as to realize the driving of the engine 1.

[0051] Referring toFigure 3 The driving system comprises an engine 1, a power generation gear box 2, a generator 3, an electric motor 4 and an electrically coupled transmission 5 connected in sequence.

[0052] With reference to Figure 4 and Figure 5 , the engine output shaft 11 is connected with the power generation gear box 2, the power generation gear box 2 comprises a first gear box gear 21, a second gear box gear 22, a third gear box gear 23, a fourth gear box gear 24 and a gear box intermediate shaft 25, the engine output shaft 11 is fixedly connected with the first gear box gear 21, the first gear box gear 21 is externally meshed with the second gear box gear 22, the second gear box gear 22 is fixedly connected with the gear box intermediate shaft 25, the gear box intermediate shaft 25 is fixedly connected with the fourth gear box gear 24, the fourth gear box gear 24 is externally meshed with the third gear box gear 23, the third gear box gear 23 is connected with the power generation main shaft 31, the electric main shaft 41 is hollow, i.e. the electric main shaft 41 is a hollow sleeve, the power generation main shaft 31 is arranged in the electric main shaft 41 and coaxially, i.e. the power generation main shaft 31 and the electric main shaft 41 are concentrically arranged, but they do not transmit power to each other, the power generation main shaft 31 and the electric main shaft 41 are both inserted into the electrically coupled transmission 5, the electrically coupled transmission 5 comprises a gear position actuating mechanism 53 (see Figure 5 ), a gear position control mechanism 55 (see Figure 5 ), a mode switching mechanism 54 (see Figure 5 ), a mode control mechanism 56 (see Figure 5 ) and a transmission intermediate shaft 52, the gear position control mechanism 55 (see Figure 5 ) realizes the connection or disconnection between the electric main shaft 41 and the gear position actuating mechanism 53 (see Figure 5 ), and the mode control mechanism 56 (see Figure 5 ) realizes the connection or disconnection between the power generation main shaft 31 and the mode switching mechanism 54 (see Figure 5 ).

[0053] The gear position actuating mechanism 53 comprises a driving gear position low speed gear 531, a driven gear position low speed gear 532, a driving gear position high speed gear 533, a driven gear position high speed gear 534 and an electrically movable gear sleeve 411; the mode switching mechanism 54 comprises a driving mode low speed gear 541, a driven mode low speed gear 542, a driving mode high speed gear 543, a driven mode high speed gear 544 and a power generation movable gear sleeve 311.

[0054] The driving gear position low speed gear 531 is externally meshed with the driven gear position low speed gear 532, the driving gear position high speed gear 533 is externally meshed with the driven gear position high speed gear 534; the driving mode low speed gear 541 is externally meshed with the driven mode low speed gear 542, and the driving mode high speed gear 543 is externally meshed with the driven mode high speed gear 544.

[0055] The driven gear low speed gear 532, the driven gear high speed gear 534, the driven mode low speed gear 542 and the driven mode high speed gear 544 are fixedly connected with the gear box intermediate shaft 52.

[0056] The driven gear low speed gear 532, the driven gear high speed gear 534, the driven mode low speed gear 542 and the driven mode high speed gear 544 are fixedly connected with the gear box intermediate shaft 52.

[0057] The driven gear low speed gear 532, the driven gear high speed gear 534, the driven mode low speed gear 542 and the driven mode high speed gear 544 are fixedly connected with the gear box intermediate shaft 52.

[0058] The gear control mechanism 55 includes a gear driving motor 551, a gear transmission member 552, a gear shifting knob 553 connected with the gear transmission member 552 and a gear shifting fork 554 matched with the gear shifting knob 553; the mode control mechanism 56 includes a mode driving motor 561, a mode transmission member 562, a mode shifting knob 563 connected with the mode transmission member 562 and a mode shifting fork 564 matched with the mode shifting knob 563.

[0059] Referring to Figure 6 , the engine output shaft 11 transmits power to the power generation main shaft 31 through the first box gear 21, the second box gear 22, the gear box intermediate shaft 25, the fourth box gear 24 and the third box gear 23, the power generation main shaft 31 is fixedly connected with the power generation rotor 33 which can rotate relative to the power generation stator 32. The power generation main shaft 31 is hollowly arranged, the power generation main shaft 31 is arranged through the power generation main shaft 31 and extends to the electrically coupled gear box 5, the power generation main shaft 31 is fixedly connected with the power generation rotor 33 which can rotate relative to the power generation stator 32, the power generation main shaft 31 and the power generation main shaft 31 are coaxially arranged and do not transmit power to each other.

[0060] The gear control mechanism 55 controls the connection or disconnection of the gear actuating mechanism 53 and the power output shaft 51, and the mode control mechanism 56 controls the connection or disconnection of the mode switching mechanism 54 and the power output shaft 51.

[0061] Referring to Figure 4 and Figure 7 The driving gear low-speed gear 531 is externally meshed with the driven gear low-speed gear 532, and the driving gear high-speed gear 533 is externally meshed with the driven gear high-speed gear 534; the driving mode low-speed gear 541 is externally meshed with the driven mode low-speed gear 542, and the driving mode high-speed gear 543 is externally meshed with the driven mode high-speed gear 544. The driven gear low-speed gear 532, the driven gear high-speed gear 534, the driven mode low-speed gear 542, and the driven mode high-speed gear 544 are all fixedly connected to the transmission intermediate shaft 52.

[0062] The electrically driven movable sleeve 411 is arranged axially between the driving gear low-speed gear 531 and the driving gear high-speed gear 533 of the electrically driven main shaft 41; and the electrically driven movable sleeve 311 is arranged axially between the driving mode low-speed gear 541 and the driving mode high-speed gear 543 of the electrically driven main shaft 31.

[0063] The driving mode high-speed gear 543 is connected to the power output shaft 51. That is, the electrically driven coupling transmission 5 is connected to the vehicle differential rear axle, and the vehicle control system controls the connection or disconnection of the power output shaft 51 to the engine output shaft 11 and / or the electrically driven main shaft 41. When the engine output shaft 11 is connected, the engine 1 directly drives the rear axle differential, and two drive speed ratios can be achieved; when the electrically driven main shaft 41 is connected, the electrically driven main shaft 41 is connected to the power output shaft 51, and at this time the electric motor 4 drives the vehicle rear axle differential; and when the engine 1 and the electric motor 4 are connected together, the engine 1 and the electric motor 4 are connected to the power output shaft 51 to form a hybrid power assist to the rear axle.

[0064] Referring to Figure 8 The gear control mechanism 55 includes a gear driving motor 551, a gear transmission member 552, a gear shifting knob 553, a gear shifting fork 554, and a gear sensor 555. The gear sensor 555 feeds back the detected position signal to the vehicle control system, the vehicle control system receives the signal of the gear sensor 555, the vehicle control system accurately controls the movement of the gear driving motor 551, the gear driving motor 551 drives the gear transmission member 552, the gear transmission member 552 drives the gear shifting knob 553, the gear shifting knob 553 drives the gear shifting fork 554, the gear shifting fork 554 is slidingly connected to the support shaft 57, and the support shaft 57 is parallel to the electrically driven main shaft 41.

[0065] The gear control mechanism 55 in the electrically driven coupling transmission 5 controls the switching of high and low gears, and realizes the output of the electric motor 4 as high and low gears. It can be applied to different working conditions such as low-speed starting, climbing and high-speed running.

[0066] The mode control mechanism 56 comprises a mode driving motor 561, a mode transmission 562, a mode shifting head 563 connected with the mode transmission 562, a mode shifting fork 564 cooperating with the mode shifting head 563, and a mode sensor 565 feeding back the detected position signal to the vehicle control system. The vehicle control system receives the signal of the gear sensor 555, accurately controls the movement of the mode driving motor 561, transmits the movement to the mode shifting head 563 through the mode transmission 562, transmits the movement to the mode shifting fork 564 through the mode shifting head 563, and is in sliding connection with the support shaft 57.

[0067] Referring to Figure 8 The gear shifting fork 554 is inserted into the ring groove of the electric active gear sleeve 411, and drives the electric active gear sleeve 411 to move towards the driving low-speed gear 531 or the driving high-speed gear 533. The end of the driving low-speed gear 531 is fixedly provided with a fixed gear sleeve, and the end of the driving high-speed gear 533 is fixedly provided with a fixed gear sleeve. The fixed gear sleeves are sleeved on the electric main shaft 41 and are not connected with the electric main shaft 41, and can rotate idly around the electric main shaft 41. The movement of the gear shifting fork 554 connects the electric active gear sleeve 411 with the fixed gear sleeve, and transmits power to the driving low-speed gear 531 or the driving high-speed gear 533, so as to realize the conversion of the two gears. Therefore, the gear shifting fork 554 realizes the electric high-gear and low-gear switching through the meshing with different gear sets, and the shifting fork can also be placed in the middle position to be disconnected with the gears and completely disconnected with the electric main shaft 41. Figure 8 The electric active gear sleeve 411 in the middle position is neither connected with the driving low-speed gear 531 nor connected with the driving high-speed gear 533.

[0068] The mode shifting fork 564 is inserted into the ring groove of the electric active gear sleeve 311, and drives the electric active gear sleeve 311 to move towards the driving mode low-speed gear 541 or the driving mode high-speed gear 543. The end of the driving mode low-speed gear 541 is provided with a fixed gear sleeve, and the fixed gear sleeve is sleeved on the electric main shaft 31 and is not connected with the electric main shaft 31, and can rotate idly around the electric main shaft 31. The end of the driving mode high-speed gear 543 is fixedly provided with a fixed gear sleeve. The movement of the shifting fork connects the electric active gear sleeve 311 with the fixed gear sleeve, and transmits power to the driving mode low-speed gear 541 or the driving mode high-speed gear 543, so as to realize the conversion of the two gears. Figure 4 The electric active gear sleeve 311 in the middle position is neither connected with the driving mode low-speed gear 541 nor connected with the driving mode high-speed gear 543.

[0069] Referring to Figure 9 The transmission relationship of various driving modes is described as follows:

[0070] The dual-motor four-gear extended-range hybrid drive system of the embodiment has four transmission shafts, i.e., an engine output shaft 11, a power generation main shaft 31, an electric driving main shaft 41 and a power output shaft 51, which are coaxially arranged.

[0071] 1. Driving transmission path of pure electric low-gear drive mode

[0072] The electric driving movable sleeve 411 is connected with the driving low-speed gear 531, and the power generation movable sleeve 311 is in the neutral position.

[0073] The electric motor 4, the electric driving main shaft 41, the electric driving movable sleeve 411, the driving low-speed gear 531, the driven low-speed gear 532, the transmission intermediate shaft 52, the driven high-speed gear 544, the driving high-speed gear 543, the power output shaft 51 and the vehicle rear axle.

[0074] 2. Driving transmission path of pure electric high-gear drive mode

[0075] The electric driving movable sleeve 411 is connected with the driving high-speed gear 533, and the power generation movable sleeve 311 is in the neutral position.

[0076] The electric motor 4, the electric driving main shaft 41, the power generation movable sleeve 311, the driving high-speed gear 533, the driven high-speed gear 534, the transmission intermediate shaft 52, the driven high-speed gear 544, the driving high-speed gear 543, the power output shaft 51 and the vehicle rear axle.

[0077] 3. Driving transmission path of engine 1 direct drive mode with speed ratio 1

[0078] The electric driving movable sleeve 411 is in the neutral position, and the power generation movable sleeve 311 is connected with the driving high-speed gear 543.

[0079] The engine 1, the engine output shaft 11, the first gearbox gear 21, the second gearbox gear 22, the gearbox intermediate shaft 25, the fourth gearbox gear 24, the third gearbox gear 23, the power generation main shaft 31, the power generation movable sleeve 311, the driving high-speed gear 543, the power output shaft 51 and the vehicle rear axle.

[0080] 4. Driving transmission path of engine 1 direct drive mode with speed ratio 2

[0081] The electric driving movable sleeve 411 is in the neutral position, and the power generation movable sleeve 311 is connected with the driving low-speed gear 541.

[0082] Engine 1, engine output shaft 11, first box gear 21, second box gear 22, gear box intermediate shaft 25, fourth box gear 24, third box gear 23, power generation main shaft 31, power generation movable sleeve 311, driving mode low speed gear 541, driven mode low speed gear 542, gear box intermediate shaft 52, driven mode high speed gear 544, driving mode high speed gear 543, power output shaft 51, vehicle rear axle.

[0083] 5. Driving transmission path of hybrid power generation mode

[0084] Electric movable sleeve 411 is connected with driving gear low speed gear 531 (driving gear high speed gear 533), and power generation movable sleeve 311 is located in the middle position.

[0085] Electric motor 4, electric main shaft 41, electric movable sleeve 411, driving gear low speed gear 531 (driving gear high speed gear 533), driven gear low speed gear 532 (driven gear high speed gear 534), gear box intermediate shaft 52, driven mode high speed gear 544, driving mode high speed gear 543, power output shaft 51, vehicle rear axle.

[0086] Engine 1, engine output shaft 11, first box gear 21, second box gear 22, gear box intermediate shaft 25, fourth box gear 24, third box gear 23, power generation main shaft 31, power generation rotor 33, power generator 3.

[0087] 6. Driving transmission path of hybrid power assist mode

[0088] Electric movable sleeve 411 is connected with driving gear low speed gear 531 (driving gear high speed gear 533), and power generation movable sleeve 311 is connected with driving mode high speed gear 543.

[0089] Electric motor 4, electric main shaft 41, electric movable sleeve 411, driving gear low speed gear 531 (driving gear high speed gear 533), driven gear low speed gear 532 (driven gear high speed gear 534), gear box intermediate shaft 52, driven mode high speed gear 544, driving mode high speed gear 543, power output shaft 51, vehicle rear axle.

[0090] Engine 1, engine output shaft 11, first box gear 21, second box gear 22, gear box intermediate shaft 25, fourth box gear 24, third box gear 23, power generation main shaft 31, power generation movable sleeve 311, driving mode high speed gear 543, power output shaft 51, vehicle rear axle.

[0091] The power generation movable gear sleeve 311 is in the middle position or connected with the main drive mode high speed gear 543, so that the engine 1 is switched between the power generation mode and the engine 1 direct drive mode. The hybrid power-assisted drive mode is the co-operation of the pure electric drive mode and the engine 1 pure oil drive mode, and the mode is switched and adjusted according to the different driving loads. It is used for the driving conditions of the vehicle requiring acceleration and climbing. In the pure electric drive condition, the vehicle control system determines the vehicle system needs engine 1 assistance according to the vehicle speed, the accelerator pedal and other signals, and the vehicle control system can control the high and low gear shifting of the electric drive, and can shift four kinds of output power and speed according to the vehicle condition requirement. When the vehicle system enters the large load condition of climbing or acceleration, the vehicle control system first starts the engine 1 and adjusts the speed of the engine 1 to be synchronized with the speed of the motor, and then outputs the signal to drive the mode switching mechanism 54 to engage the gear, so as to realize the engine 1 assistance working mode.

[0092] 7. The path of the brake energy recovery mode

[0093] The electric movable gear sleeve 411 is connected with the main gear high speed gear 533, and the power generation movable gear sleeve 311 is in the middle position.

[0094] The rear axle, the power output shaft 51, the main drive mode high speed gear 543, the driven mode high speed gear 544, the gearbox intermediate shaft 52, the driven gear high speed gear 534, the main gear high speed gear 533, the electric movable gear sleeve 411, the electric main shaft 41 and the electric motor 4.

[0095] 8. The path of the idle power generation mode

[0096] The electric movable gear sleeve 411 is in the middle position, and the power generation movable gear sleeve 311 is in the middle position.

[0097] The engine 1, the engine output shaft 11, the first gearbox gear 21, the second gearbox gear 22, the gearbox intermediate shaft 25, the fourth gearbox gear 24, the third gearbox gear 23, the power generation main shaft 31, the power generation rotor 33 and the power generator 3.

[0098] When the engine 1 pure oil drive mode and the hybrid power-assisted drive mode, the power generation main shaft 31 rotates, at this time, the power generator 3 is controlled by adjusting the motor controller to make its output torque zero, at this time, the power generator 3 stops power generation and has small no-load operation loss, and has no loss and influence on the whole system.

[0099] The double-motor four-gear extended-range hybrid drive system can be used in the extended-range electric vehicle or hybrid field.

[0100] The implementation principle of the dual-motor automatic gear range-extending hybrid drive system of the present embodiment 1 is that a wide range of gear ratios are selected in combination, so that the range-extending vehicle can achieve the best power consumption and driving comfort under various working conditions, and can realize hybrid and pure oil working modes. Pure electric low gear mode is used for starting and low speed, pure electric high gear mode is used for medium speed and medium load, hybrid power mode is used for acceleration or climbing, and multi-ratio mode is used for engine 1 direct drive at medium-high speed or high speed to save electricity.

[0101] Embodiment 2

[0102] With reference to ​ The difference between the present embodiment and embodiment 1 is that the third box gear 23 in the power generation gear box 2 is not fixedly connected with the power generation shaft 31, but is sleeved on the power generation shaft 31, and the third box gear 23 is provided with a fixed tooth sleeve on the outer periphery. The gear box movable tooth sleeve 26 is provided between the first box gear 21 and the third box gear 23 on the power generation shaft 31. When the gear box movable tooth sleeve 26 moves towards the direction of the power generation machine 1, the engine output shaft 11 and the power generation shaft 31 connected with the gear box movable tooth sleeve 26 are directly connected, realizing transmission. When the gear box movable tooth sleeve 26 moves away from the direction of the power generation machine 1, the engine output shaft 11 is transmitted to the power generation shaft 31 through the first box gear 21, the second box gear 22, the third box gear 23 and the fourth box gear 24.

[0103] The gear box control mechanism including the gear box sensor 27 is further provided in the power generation gear box 2 to control the movement direction of the gear box movable tooth sleeve 26.

[0104] The implementation principle of the present embodiment is basically the same as that of embodiment 1, and the gear box movable tooth sleeve 26 is additionally provided in the power generation gear box 2. Two transmission ratios are realized by different movement directions of the gear box movable tooth sleeve 26, so as to realize the selection of two gears from the engine 1 to the power generation machine 3.

[0105] Embodiment 3

[0106] The difference between the present embodiment and embodiment 1 is that the power generation gear box 2 is not included, and the engine output shaft 11 is connected with the power generation main shaft 31.

[0107] The implementation principle of the present embodiment is basically the same as that of embodiment 1, except that the power conversion between the engine 1 and the power generation machine is not provided.

[0108] Embodiment 4

[0109] The difference between the present embodiment and embodiment 1 is that an additional power generation movable tooth sleeve 311 is provided, and corresponding gear sets and fixed tooth sleeves connectable therewith are provided.

[0110] The implementation principle of the present embodiment is basically the same as that of embodiment 1, and one or two gears can be added to the engine.

[0111] Embodiment 5

[0112] The difference between this embodiment and embodiment 1 is that an electrically driven movable tooth sleeve 411 is additionally provided, and a corresponding gear set connectable with the tooth sleeve and a fixed tooth sleeve are additionally provided.

[0113] The implementation principle of this embodiment is basically the same as that of embodiment 1, and one or two gears can be additionally provided for the electric motor.

[0114] Embodiment 6

[0115] This embodiment provides an automobile, and a driving system of the automobile uses the dual-motor automatic gear range-extending hybrid driving system described in embodiment 1.

[0116] The implementation principle of the driving system of this embodiment is the same as that of embodiment 1.

[0117] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, and therefore: any equivalent changes made according to the structure, structure, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A dual-motor automatic range-extending hybrid drive system comprising an engine (1), a generator (3) and an electric motor (4), characterized in that: The engine output shaft (11) is connected with one end of the power generation main shaft (31), the other end of the power generation main shaft (31) is arranged in the motor main shaft (41), and the two are coaxially arranged, the power generation main shaft (31) and the motor main shaft (41) are rotatably connected with the motor coupling gearbox (5), the motor coupling gearbox (5) is used for connecting the power output shaft (51); the engine output shaft (11) and the power output shaft (51) are coaxially arranged; the motor coupling gearbox (5) includes a gear position execution mechanism (53), a mode switching mechanism (54) and a gearbox intermediate shaft (52) connecting the gear position execution mechanism (53) and the mode switching mechanism (54); the gear position execution mechanism (53) realizes the connection or disconnection of the motor main shaft (41) and the power output shaft (51); the mode switching mechanism (54) realizes the connection or disconnection of the power generation main shaft (31) and the power output shaft (51); The gear position execution mechanism (53) includes an electrically operated toothed sleeve (411) connected with the motor main shaft (41), a pair of externally meshing low-speed gear and a pair of externally meshing high-speed gear; wherein: one low-speed gear is a driving low-speed gear (531), which can be matched with the electrically operated toothed sleeve (411), and the other is a driven low-speed gear (532), which is connected with the gearbox intermediate shaft (52); one high-speed gear is a driving high-speed gear (533), which can be matched with the electrically operated toothed sleeve (411), and the other is a driven high-speed gear (534), which is connected with the gearbox intermediate shaft (52); The power generation gear box (2) is provided with a third box gear (23), the third box gear (23) is sleeved on the power generator shaft (31), the third box gear (23) is provided with a fixed tooth sleeve on the outer periphery, and the gear box movable tooth sleeve (26) is arranged between the first box gear (21) and the third box gear (23) on the power generator shaft (31), when the gear box movable tooth sleeve (26) moves towards the direction of the power generator (1), the engine output shaft (11) and the power generator shaft (31) connected with the gear box movable tooth sleeve (26) are directly connected, realizing transmission; when the gear box movable tooth sleeve (26) moves away from the direction of the power generator (3), the engine output shaft (11) is transmitted to the power generator shaft (31) through the first box gear (21), the second box gear (22), the third box gear (23) and the fourth box gear (24).

2. The dual-motor automatic range-extending hybrid drive system of claim 1, wherein: The mode switching mechanism (54) includes at least one power generation movable tooth sleeve (311) connected with the power generation main shaft (31), and at least one pair of gear sets matched with the power generation movable tooth sleeve (311) and transmitting power to the power output shaft (51).

3. The dual-motor automatic range-extending hybrid drive system of claim 2, wherein: The mode switching mechanism (54) comprises a power generation movable gear sleeve (311) connected with the power generation main shaft (31), a pair of externally meshed mode low speed gears and a pair of externally meshed mode high speed gears; wherein: one mode low speed gear is a driving mode low speed gear (541) which can cooperate with the power generation movable gear sleeve (311), and the other is a driven mode low speed gear (542) connected with the gearbox intermediate shaft (52); one mode high speed gear is a driving mode high speed gear (543) which can cooperate with the power generation movable gear sleeve (311), and the other is a driven mode high speed gear (544) connected with the gearbox intermediate shaft (52).

4. The dual-motor automatic range-extending hybrid drive system of claim 3, wherein: The electrically coupled gearbox (5) is provided with a gear control mechanism (55) and a mode control mechanism (56), the gear control mechanism (55) controls the motion state of the gear execution mechanism (53); the mode control mechanism (56) controls the motion state of the mode switching mechanism (54).

5. The dual-motor automatic range-extending hybrid drive system of claim 4, wherein: The gear control mechanism (55) comprises a gear driving motor (551), a gear transmission member (552), a gear shifting head (553) connected with the gear transmission member (552) and a gear shifting fork (554) matched with the gear shifting head (553).

6. The dual-motor automatic range-extending hybrid drive system of claim 4, wherein: The mode control mechanism (56) comprises a mode driving motor (561), a mode transmission member (562), a mode shifting head (563) connected with the mode transmission member (562) and a mode shifting fork (564) matched with the mode shifting head (563).

7. A car using the dual-motor automatic gear extended-range hybrid drive system according to any one of claims 1-6.

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