Hybrid transmission for motor vehicles

Abstract

The present invention discloses a hybrid power transmission device for a motor vehicle, comprising a first motor (EM1), a second motor (EM2), an engine input end (ENG-IN), an input shaft (IN), an output shaft (OUT), two planetary gear sets (PG1, PG2) and seven switching components (A1, A2, B1, B2, C1, C2, K), and by selectively operating some of the switching components, different speed ratios between the first motor (EM1), the engine input end (ENG-IN), the input shaft (IN) and the output shaft (OUT) can be obtained. The hybrid power transmission device for a motor vehicle of the present invention combines a plurality of switching components to achieve a large number of gears and a variety of operating modes while achieving a compact structure, and can realize parking charging, pure electric drive, parallel or direct drive, series drive, pure electric reverse gear, brake energy recovery and other operating modes.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle power transmission, and in particular, the present invention relates to a hybrid power transmission device for a motor vehicle. Background Art

[0002] The so-called hybrid transmission device contains one or two motors inside, and the input end is connected to the vehicle's engine. The different gears of the motor and engine are realized through the internal gear pair and switching components, where the gear pair can be an external meshing gear pair or a planetary gear system. The motor and the engine can drive the vehicle alone or together. In addition, the motor has the function of generating electricity, and can realize functions such as series connection and brake energy recovery. Compared with traditional vehicles, vehicles equipped with hybrid transmission devices have better power and fuel economy, and better endurance.

[0003] There are many combinations of planetary gear trains known in the prior art, such as the Simpson type and the Ravina type. Among them, the Ravina type contains a single planetary gear train and a double planetary gear train mechanism, and the two mechanisms share a planet carrier (PC), a planetary gear and a ring gear (R). Its mechanism is compact and simple, and it can achieve multiple gears. Therefore, it is widely used in the transmission industry, especially the traditional automatic transmission (AT).

[0004] In order to achieve multiple gears, existing hybrid power transmission devices often use multiple sets of external meshing gear pairs or complex planetary gear combination mechanisms, which are not compact enough and have relatively high costs. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a hybrid power transmission device for a motor vehicle, the purpose of which is to achieve a large number of gears and multiple operating modes under the premise of achieving a compact structure.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a hybrid power transmission device for a motor vehicle, comprising a first motor, a second motor, an engine input end, an input shaft, an output shaft, a first switching component, a second switching component, a third switching component, a fourth switching component, a fifth switching component, a sixth switching component, a seventh switching component and a Ravina-type planetary gear train, the Ravina-type planetary gear train comprising a planet carrier, a ring gear, a first sun gear, a first planetary gear, a second sun gear and a second planetary gear, the first motor is connected to the planet carrier in a relatively rotationally opposed manner, the output shaft is connected to the ring gear in a relatively rotationally opposed manner, and the input shaft can be connected to the ring gear via the first The switching component is connected to the planet carrier in a relatively rotationally opposed manner, the input shaft can be connected to the output shaft via the second switching component in a relatively rotationally opposed manner, the input shaft can be connected to the second sun gear via the sixth switching component in a relatively rotationally opposed manner, and the input shaft can be connected to the engine input end via the seventh switching component in a relatively rotationally opposed manner; a fixed component is provided, the fixed component can be connected to the second sun gear via the fifth switching component in a relatively rotationally opposed manner to fix the second sun gear; the fixed component can be connected to the first sun gear via the third switching component in a relatively rotationally opposed manner to fix the first sun gear; the planet carrier can be connected to the first sun gear via the fourth switching component in a relatively rotationally opposed manner.

[0007] By selectively operating some switching components, the following are achieved:

[0008] The first gear position of the first motor is obtained by operating the third switching component, the first gear position of the input shaft and the first gear position of the first motor are obtained by operating the third switching component and the sixth switching component, the second gear position of the input shaft and the first gear position of the first motor are obtained by operating the third switching component and the first switching component, the third gear position of the input shaft and the first gear position of the first motor are obtained by operating the third switching component and the second switching component, the third gear position of the input shaft is obtained by the second switching component, the third gear position of the input shaft and the second gear position of the first motor are obtained by the second switching component and the fourth switching component, the second gear position of the first motor is obtained by the fourth switching component, the third gear position of the input shaft and the third gear position of the first motor are obtained by the second switching component and the fifth switching component, the third gear position of the first motor is obtained by the fifth switching component, and the fourth gear position of the input shaft and the third gear position of the first motor are obtained by the fifth switching component and the first switching component.

[0009] The second motor is connected to the input shaft in a rotationally fixed manner, and the engine is started through the second motor (EM2) and the seventh switching element (K). The second motor is connected to the engine input end in a rotationally fixed manner, and the engine is directly started through the second motor.

[0010] The first switching component and the second switching component constitute a switching component pair, the third switching component and the fourth switching component constitute a switching component pair, the fifth switching component and the sixth switching component constitute a switching component pair, and the switching component pair and the seventh switching component are provided with separate operating components, which can switch from their respective neutral positions to the first switching component, the second switching component, the third switching component, the fourth switching component, the fifth switching component, the sixth switching component and the seventh switching component state respectively.

[0011] The first motor and the second motor can both participate in driving or generating electricity.

[0012] The hybrid power transmission device for motor vehicles of the present invention, while achieving a compact structure, combines multiple switching components to achieve a large number of gears and multiple operating modes, and can realize parking charging, pure electric drive, parallel or direct drive, series drive, pure electric reverse gear, brake energy recovery and other working modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] This specification includes the following drawings, which show the following contents:

[0014] Figure 1 is a schematic structural diagram of a hybrid power transmission device for a motor vehicle according to Embodiment 1;

[0015] Figure 2 is a schematic structural diagram of a hybrid power transmission device for a motor vehicle according to a second embodiment;

[0016] Figure 3 It is the gear logic diagram of the hybrid power transmission;

[0017] Figure 4 It is the shift logic diagram of the hybrid power transmission. DETAILED DESCRIPTION

[0018] The specific implementation methods of the present invention are further explained in detail below 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 facilitating its implementation.

[0019] Embodiment 1

[0020] like Figure 1As shown, this embodiment provides a hybrid power transmission device for a motor vehicle, including a first motor EM1, a second motor EM2, an engine input terminal ENG-IN, an input shaft IN, an output shaft OUT, a first switching component A1, a second switching component A2, a third switching component B1, a fourth switching component B2, a fifth switching component C1, a sixth switching component C2, a seventh switching component K and a Ravina planetary gear train. In addition, the transmission device also involves a main reduction gear and a differential, etc., which are well known in the prior art and are not illustrated in the figure.

[0021] like Figure 1 As shown, the planetary gear set (PG1, PG2) constitutes a Ravina-type planetary gear train known in the prior art, which includes a planet carrier PC, a ring gear R, a first sun gear S1, a first planetary gear P1, a second sun gear S2, and a second planetary gear P2. The first planetary gear P1 and the second planetary gear P2 are rotatably arranged on the planet carrier PC. The first sun gear S1 meshes with the first planetary gear P1, the second sun gear S2 meshes with the second planetary gear P2, the first planetary gear P1 meshes with the second planetary gear P2, and the second planetary gear P2 meshes with the ring gear R. The Ravina-type planetary gear train has the following characteristics: the rotation speeds of two of the four components, the first sun gear S1, the second sun gear S2, the planet carrier PC, and the ring gear R, are determined, and the rotation speeds of the remaining two components are determined accordingly. In terms of structure, because there are many shared parts, its structure is compact and simple.

[0022] like Figure 1 As shown, the first motor EM1 is connected to the planetary carrier PC in a relatively rotationally opposed manner, the output shaft OUT is connected to the ring gear R in a relatively rotationally opposed manner, the speed ratio between the output shaft and the vehicle wheels is fixed, and power is transmitted to the wheels, and the engine input terminal ENG-IN is connected to the vehicle's engine in a relatively rotationally opposed manner. Specifically, the engine input terminal ENG-IN is connected to a dual-mass flywheel fixed to the engine crankshaft.

[0023] like Figure 1 As shown, the input shaft IN can be connected to the planet carrier PC in a relatively rotationally rigid manner via the first switching component A1, can be connected to the output shaft OUT in a relatively rotationally rigid manner via the second switching component A2, can be connected to the second sun gear S2 in a relatively rotationally rigid manner via the sixth switching component C2, and can be connected to the engine input end ENG-IN in a relatively rotationally rigid manner via the seventh switching component K.

[0024] like Figure 1As shown, a fixed component GG is provided, and the fixed component GG can be the housing of the transmission device or a component fixedly connected to the housing. The fixed component GG can be connected to the second sun gear S2 via the fifth switching component C1 in a rotationally fixed manner to fix the second sun gear S2, and can be connected to the first sun gear S1 via the third switching component B1 in a rotationally fixed manner to fix the first sun gear S1.

[0025] like Figure 1 As shown, the planet carrier PC can be connected to the first sun gear S1 in a rotationally fixed manner via the fourth shift element B2 .

[0026] Based on the above connection relationship, three speed ratios of the first motor EM1 and four speed ratios of the input shaft IN can be achieved by operating some switching components. Figure 3 The gear logic diagram of the transmission is shown, and the specific description is as follows:

[0027] 1. Gear position 01 The first gear position of the first electric motor EM1 is obtained by operating the third switching component B1;

[0028] 2. Gear position 11 The first gear position of the input shaft IN and the first gear position of the first motor EM1 are obtained by operating the third switching component B1 and the sixth switching component C2;

[0029] 3. Gear position 21 The second gear position of the input shaft IN and the first gear position of the first motor EM1 are obtained by operating the third switching component B1 and the first switching component A1;

[0030] 4. Gear position 31 The third gear position of the input shaft IN and the first gear position of the first motor EM1 are obtained by operating the third switching component B1 and the second switching component A2;

[0031] 5. Gear position 30 obtains the third gear position of the input shaft IN through the second switching component A2;

[0032] 6. Gear position 32 obtains the third gear position of the input shaft IN and the second gear position of the first motor EM1 through the second switching component A2 and the fourth switching component B2;

[0033] 7. Gear position 02 obtains the second gear position of the first electric motor EM1 through the fourth switching element B2;

[0034] 8. Gear position 33 obtains the third gear position of the input shaft IN and the third gear position of the first motor EM1 through the second switching component A2 and the fifth switching component C1;

[0035] 9. Gear position 03 obtains the third gear position of the first electric machine EM1 through the fifth switching component C1;

[0036] 10. Gear position 43 The fourth gear position of the input shaft IN and the third gear position of the first electric motor EM1 are obtained by the fifth switching element C1 and the first switching element A1.

[0037] The above-mentioned gears and the speed ratios of the output shaft have the following relationship: the first gear speed ratio of the first motor EM1 is the same as the second gear speed ratio of the input shaft IN, the speed ratio>1, and it is a deceleration gear; the second gear speed ratio of the first motor EM1 is the same as the third gear speed ratio of the input shaft IN, the speed ratio=1, and it is a direct gear; the third gear speed ratio of the first motor EM1 is the same as the fourth gear speed ratio of the input shaft IN, the speed ratio<1, and it is an overdrive gear.

[0038] The first switching component A1 and the second switching component A2 form a switching component pair A, the third switching component B1 and the fourth switching component B2 form a switching component pair B, the fifth switching component C1 and the sixth switching component C2 form a switching component pair C, and the switching component pairs A, B, C and the seventh switching component K are provided with separate operating components, which can be switched from their respective neutral positions to the states of the first switching component A1, the second switching component A2, the third switching component B1, the fourth switching component B2, the fifth switching component C1, the sixth switching component C2 and the seventh switching component K. The switching component pairs A, B, C are preferably synchronizers or dog clutches known in the prior art, and the seventh switching component K can be a friction plate clutch, synchronizer or dog clutch known in the prior art. The switching control method can be hydraulic or electronic control. The first switching component A1 is used to realize the connection and disconnection between the input shaft IN and the planetary carrier PC, the second switching component A2 is used to realize the connection and disconnection between the input shaft IN and the output shaft OUT, the third switching component B1 is used to realize the connection and disconnection between the first sun gear S1 and the fixed component GG, the fourth switching component B2 is used to realize the connection and disconnection between the first sun gear S1 and the planetary carrier PC, the fifth switching component C1 is used to realize the connection and disconnection between the second sun gear S2 and the fixed component GG, the sixth switching component C2 is used to realize the connection and disconnection between the second sun gear S2 and the input shaft IN, and the seventh switching component K is used to realize the connection and disconnection between the input shaft IN and the engine input end ENG-IN.

[0039] like Figure 1 As shown, the second motor EM2 is connected to the input shaft IN in a rotationally fixed manner, and the gear position of the input shaft IN is the gear position of the second motor EM2. When the seventh switching element K is operated, the gear position of the input shaft IN is also the gear position of the engine.

[0040] The first electric machine EM1 and the second electric machine EM2 can both participate in driving or in generating electricity.

[0041] based on Figure 1The motor vehicle with the transmission device can realize parking charging, pure electric drive, parallel or direct drive, series drive, pure electric reverse gear, brake energy recovery and other working modes, which are briefly described as follows:

[0042] 1. When the motor vehicle is in the parking charging mode: the seventh switching component K is operated, the second motor EM2 drives to start the engine, the engine drives, and the second motor EM2 enters the power generation mode;

[0043] 2. When the motor vehicle is operating in pure electric drive mode: refer to Figure 3 In the gear logic diagram shown, the engine is not working, and the motor vehicle is driven by one of the first motor EM1 and the second motor EM2 alone, or by the first motor EM1 and the second motor EM2 together, so that the motor vehicle is moving;

[0044] 3. When the motor vehicle is operating in the parallel or direct drive mode: the transmission device is in the gear position 11, gear position 21, gear position 31, gear position 30, gear position 32, gear position 33 or gear position 43, and the seventh switching component K is operated at the same time, so that the engine and the motor drive the motor vehicle together or alone to travel;

[0045] 4. When the motor vehicle is operating in the series drive mode: the transmission device is in gear position 01, gear position 02 or gear position 03, and the seventh switching element K is operated at the same time, the engine is driven, the second electric machine EM2 enters the power generation mode, and the first electric machine EM1 drives the motor vehicle alone to travel;

[0046] 5. When the motor vehicle is in the pure electric reverse gear mode: in the pure electric drive state, the motor vehicle is driven in reverse by one of the first motor EM1 and the second motor EM2 alone, or by both of the first motor EM1 and the second motor EM2.

[0047] 6. When the motor vehicle is operating in the braking energy recovery mode: refer to Figure 3 As shown in the gear logic diagram, when the vehicle brakes to decelerate, the first motor EM1 and the second motor EM2 generate electricity individually or together to recover energy.

[0048] Embodiment 2

[0049] like Figure 2 As shown, this embodiment provides a hybrid power transmission device for a motor vehicle. The difference between this embodiment and the first embodiment is that the second motor EM2 is connected to the engine input terminal ENG-IN in a relatively rotationally opposed manner. When the seventh switching component K is operated, the gear position of the input shaft IN is the gear position of the engine and the second motor EM2.

[0050] based on Figure 2 The motor vehicle operating mode of the transmission device is briefly described as follows:

[0051] 1. When the motor vehicle is in the parking charging mode: after the second motor EM2 directly drives the engine to start, the engine is driven and the second motor EM2 enters the power generation mode;

[0052] 2. When the motor vehicle is in the pure electric drive mode: the transmission device is in gear position 01, gear position 02 or gear position 03, the engine is not working, and the first electric motor EM1 alone drives the motor vehicle to travel;

[0053] 3. When the motor vehicle is operating in the parallel or direct drive mode: the transmission device is in the gear position 11, gear position 21, gear position 31, gear position 30, gear position 32, gear position 33 or gear position 43, and the seventh switching component K is operated at the same time, so that the engine and the motor drive the motor vehicle together or alone to travel;

[0054] 4. When the motor vehicle is operating in the series drive mode: the transmission device is in gear position 01, gear position 02 or gear position 03, the engine is driven, the second motor EM2 enters the power generation mode, and the first motor EM1 drives the motor vehicle alone to travel;

[0055] 5. When the motor vehicle is operating in the pure electric reverse gear mode: in the pure electric driving state, the first electric motor EM1 drives in reverse to make the motor vehicle travel;

[0056] 6. When the motor vehicle is operating in the braking energy recovery mode: the transmission device is in gear position 01, gear position 02 or gear position 03, when the vehicle brakes to decelerate, the first motor EM1 generates electricity to recover energy.

[0057] Figure 4 The shifting logic diagram of the gear positions is shown, and power can be ensured to be uninterrupted during the shifting process, that is, at least one end of the first motor EM1 and the input shaft IN provides power.

[0058] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A hybrid power transmission device for a motor vehicle, comprising a first motor (EM1), a second motor (EM2), an engine input end (ENG-IN), an input shaft (IN), an output shaft (OUT), a first switching component (A1), a second switching component (A2), a third switching component (B1), a fourth switching component (B2), a fifth switching component (C1), a sixth switching component (C2), a seventh switching component (K) and a Ravina planetary gear train, wherein the Ravina planetary gear train comprises a planet carrier (PC), a ring gear (R), a first sun gear (S1), a first planetary gear (P1), a second sun gear (S2) and a second planetary gear (P2), wherein the first motor (EM1) is connected to the planet carrier (PC) in a rotationally fixed manner, and the output shaft (OUT) is connected to the ring gear (R) in a rotationally fixed manner, wherein: The input shaft (IN) can be connected to the planet carrier (PC) via the first switching component (A1) in a relatively rotationally fixed manner, the input shaft (IN) can be connected to the output shaft (OUT) via the second switching component (A2) in a relatively rotationally fixed manner, the input shaft (IN) can be connected to the second sun gear (S2) via the sixth switching component (C2) in a relatively rotationally fixed manner, and the input shaft (IN) can be connected to the engine input end (ENG-IN) via the seventh switching component (K) in a relatively rotationally fixed manner; A fixed component (GG) is provided, and the fixed component (GG) can be connected to the second sun gear (S2) via the fifth switching component (C1) in a relatively rotationally fixed manner, so that the second sun gear (S2) is fixed; the fixed component (GG) can be connected to the first sun gear (S1) via the third switching component (B1) in a relatively rotationally fixed manner, so that the first sun gear (S1) is fixed; The planet carrier (PC) can be connected to the first sun gear (S1) via the fourth switching element (B2) in a rotationally fixed manner; By selectively operating some switching components, the following are achieved: The first gear of the first motor (EM1) is obtained by operating the third switching component (B1), the first gear of the input shaft (IN) and the first gear of the first motor (EM1) are obtained by operating the third switching component (B1) and the sixth switching component (C2), the second gear of the input shaft (IN) and the first gear of the first motor (EM1) are obtained by operating the third switching component (B1) and the first switching component (A1), the third gear of the input shaft (IN) and the first gear of the first motor (EM1) are obtained by operating the third switching component (B1) and the second switching component (A2), the third gear of the input shaft (IN) and the first gear of the first motor (EM1) are obtained by operating the second switching component (A2). gear, obtaining the third gear of the input shaft (IN) and the second gear of the first motor (EM1) through the second switching component (A2) and the fourth switching component (B2), obtaining the second gear of the first motor (EM1) through the fourth switching component (B2), obtaining the third gear of the input shaft (IN) and the third gear of the first motor (EM1) through the second switching component (A2) and the fifth switching component (C1), obtaining the third gear of the first motor (EM1) through the fifth switching component (C1), and obtaining the fourth gear of the input shaft (IN) and the third gear of the first motor (EM1) through the fifth switching component (C1) and the first switching component (A1); The first switching component (A1) and the second switching component (A2) form a first switching component pair (A), the third switching component (B1) and the fourth switching component (B2) form a second switching component pair (B), the fifth switching component (C1) and the sixth switching component (C2) form a third switching component pair (C), the first switching component pair (A), the second switching component pair (B), the third switching component pair (C) and the seventh switching component (K) are provided with separate operating components, and can be switched from their respective neutral positions to the states of the first switching component (A1), the second switching component (A2), the third switching component (B1), the fourth switching component (B2), the fifth switching component (C1), the sixth switching component (C2) and the seventh switching component (K); The first electric machine (EM1) and the second electric machine (EM2) can both participate in driving or in generating electricity.

2. The hybrid power transmission for a motor vehicle according to claim 1, characterized in that: The second electric machine (EM2) is connected to the input shaft (IN) in a rotationally fixed manner, and the engine is started by the second electric machine (EM2) and the seventh switching element (K).

3. The hybrid power transmission for a motor vehicle according to claim 1, characterized in that: The second electric motor (EM2) is connected to the engine input terminal (ENG-IN) in a rotationally fixed manner, and the engine is directly started by the second electric motor (EM2).

4. A hybrid power transmission for a motor vehicle according to claim 1 or 2, characterized in that: The first switching component (A1) is used to realize the connection and disconnection between the input shaft (IN) and the planetary carrier (PC), the second switching component (A2) is used to realize the connection and disconnection between the input shaft (IN) and the output shaft (OUT), the third switching component (B1) is used to realize the connection and disconnection between the first sun gear (S1) and the fixed component (GG), the fourth switching component (B2) is used to realize the connection and disconnection between the first sun gear (S1) and the planetary carrier (PC), the fifth switching component (C1) is used to realize the connection and disconnection between the second sun gear (S2) and the fixed component (GG), and the sixth switching component (C2) is used to realize the connection and disconnection between the second sun gear (S2) and the input shaft (IN).

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