Planetary gear train multi-gear hybrid vehicle transmission and its transmission method

Abstract

A multi-gear hybrid vehicle transmission device and its transmission method using planetary gear trains belong to the field of automotive parts technology. The input end of the input shaft is connected to the engine, and the output end of the input shaft is connected to a front-end motor via a first planetary gear train. The input shaft is also connected to an output shaft via a first clutch. The output shaft is connected to a third planetary gear train, which in turn is connected to a second clutch and another second planetary gear train. Both the second clutch and the second planetary gear train are connected to the third clutch. The second planetary gear train is connected to a rear-end motor. The stators of the front-end and rear-end motors, the third clutch, the first planetary gear train, and the third planetary gear train are all connected to a housing. This invention offers multiple clutch and planetary gear train combination types, simple assembly, fewer parts, and the ability to achieve large speed ratio changes and a wide transmission ratio range. It features a reasonable structure, simple assembly, multiple achievable modes, and high cost-effectiveness, making it easy to use and promote.

Description

Technical Field

[0001] This invention relates to a planetary gear system multi-gear hybrid vehicle transmission device and its transmission method, belonging to the field of automotive parts technology. Background Technology

[0002] Hybrid power is an important branch of electrification. The compact structure and relatively simple control of hybrid vehicle transmission devices have gradually made them one of the important development directions in the field of new energy.

[0003] However, the existing hybrid vehicle transmissions have a limited range of two-speed ratio gradients, resulting in a small achievable speed ratio range that cannot meet the speed ratio gradient and range requirements of some vehicles under certain operating conditions. Summary of the Invention

[0004] To address the problems existing in the background art, the present invention provides a planetary gear system multi-gear hybrid vehicle transmission device and its transmission method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a multi-gear hybrid vehicle transmission device with planetary gear train, comprising an input shaft, a housing, a front motor, a rear motor, an output shaft, a first clutch, a second clutch, a third clutch, a first planetary gear train, a second planetary gear train, and a third planetary gear train; the input end of the input shaft is connected to the engine, the output end of the input shaft is connected to the front motor through the first planetary gear train, and the input shaft is connected to the output shaft through the first clutch; the output shaft is connected to the third planetary gear train, the third planetary gear train is connected to the second clutch and the second planetary gear train, the second clutch and the second planetary gear train are both connected to the third clutch, the second planetary gear train is connected to the rear motor, and the stator of the front motor, the stator of the rear motor, the third clutch, the first planetary gear train, and the third planetary gear train are all connected to the housing; the first planetary gear train includes a first sun gear, first planet gears, a first planet carrier, and a first external gear ring; the first planet carrier is fixedly connected to the input shaft and the first clutch. The first planetary gear system comprises a first planetary gear on a first planetary carrier, which meshes with a first sun gear and a first external gear ring. The first external gear ring is fixedly mounted on the housing, and the first sun gear is connected to the rotor of the front-end motor. The third planetary gear system comprises a third sun gear, a third planetary gear, a third planetary carrier, and a third external gear ring. The third planetary carrier is fixedly connected to the output shaft and a second clutch, and a third planetary gear is mounted on the third planetary carrier. The third planetary gear meshes with a third sun gear and a third external gear ring. The third external gear ring is connected to a second planetary gear, and the third sun gear is connected to the housing. The second planetary gear system comprises a second sun gear, a second planetary gear, a second planetary carrier, and a second external gear ring. The second planetary carrier is fixedly connected to the third external gear ring, and a second planetary gear is mounted on the second planetary carrier. The second planetary gear meshes with a second sun gear and a second external gear ring. The second external gear ring is connected to a second clutch and a third clutch, and the second sun gear is connected to the rotor of the rear-end motor.

[0006] The present invention discloses a method for transmitting the EV gear in a multi-gear hybrid vehicle transmission system using a planetary gear train, the method comprising the following steps:

[0007] S1: The front motor and engine are put into a non-working state, the first clutch and the second clutch are put into a disengaged state, the third clutch is put into a engaged state, and the rear motor is put into a working state.

[0008] S2: Start the rear-end motor to drive the second sun gear to rotate;

[0009] S3: The second sun gear drives the second planetary gear to rotate;

[0010] S4: The second planetary gear drives the second planetary carrier to rotate;

[0011] S5: The second planetary carrier drives the third external gear ring to rotate;

[0012] S6: The third external gear ring drives the third planetary gear to rotate;

[0013] S7: The third planetary gear drives the third planetary carrier to rotate;

[0014] S8: The third planetary carrier drives the output shaft to rotate, thus outputting power.

[0015] The present invention discloses a method for transmitting the EV gear in a multi-gear hybrid vehicle transmission system using a planetary gear train, the method comprising the following steps:

[0016] S1: The front motor and engine are put into a non-working state, the first clutch and the third clutch are put into a disengaged state, the second clutch is put into a engaged state, and the rear motor is put into a working state.

[0017] S2: Start the rear-end motor to drive the second sun gear to rotate;

[0018] S3: The second sun gear drives the second planetary gear to rotate;

[0019] S4: The second planetary gear drives the second planetary carrier and the second external gear ring to rotate simultaneously;

[0020] S5: The second planetary carrier drives the third external gear ring to rotate, the third external gear ring drives the third planetary gear to rotate, the third planetary gear drives the third planetary carrier to rotate; at the same time, the second external gear ring drives the third planetary carrier to rotate through the second clutch;

[0021] S6: The third planetary carrier drives the output shaft to rotate, thus outputting power.

[0022] The present invention discloses a method for cascading a first gear in a multi-gear planetary gear system transmission for a hybrid vehicle, the method comprising the following steps:

[0023] S1: The front motor, the rear motor, and the engine are all in working condition, the first clutch and the second clutch are in disengaged state, and the third clutch is in engaged state.

[0024] S2: Start the engine to drive the input shaft to rotate;

[0025] S3: The input shaft drives the first planetary carrier to rotate;

[0026] S4: The first planetary carrier drives the first planetary gear to rotate;

[0027] S5: The first planetary gear drives the first sun gear to rotate;

[0028] S6: The first sun gear drives the rotor of the front motor to rotate, storing energy in the battery;

[0029] S7: The rear-end motor receives energy from the battery to drive the second sun gear to rotate;

[0030] S8: The second sun gear drives the second planetary gear to rotate;

[0031] S9: The second planetary gear drives the second planetary carrier to rotate;

[0032] S10: The second planetary carrier drives the third external gear ring to rotate;

[0033] S11: The third external gear ring drives the third planetary gear to rotate;

[0034] S12: The third planetary gear drives the third planetary carrier to rotate;

[0035] S13: The third planetary carrier drives the output shaft to rotate, thus outputting power.

[0036] The present invention discloses a method for a series two-gear transmission in a planetary gear system multi-gear hybrid vehicle transmission device, the method comprising the following steps:

[0037] S1: The front motor, the rear motor, and the engine are all in working condition, the first clutch and the third clutch are in disengaged state, and the second clutch is in engaged state.

[0038] S2: Start the engine to drive the input shaft to rotate;

[0039] S3: The input shaft drives the first planetary carrier to rotate;

[0040] S4: The first planetary carrier drives the first planetary gear to rotate;

[0041] S5: The first planetary gear drives the first sun gear to rotate;

[0042] S6: The first sun gear drives the rotor of the front motor to rotate, storing energy in the battery;

[0043] S7: The rear-end motor receives energy from the battery to drive the second sun gear to rotate;

[0044] S8: The second sun gear drives the second planetary gear to rotate;

[0045] S9: The second planetary gear drives the second planetary carrier and the second external gear ring to rotate simultaneously;

[0046] S10: The second planetary carrier drives the third external gear ring to rotate, the third external gear ring drives the third planetary gear to rotate, the third planetary gear drives the third planetary carrier to rotate; at the same time, the second external gear ring drives the third planetary carrier to rotate through the second clutch;

[0047] S11: The third planetary carrier drives the output shaft to rotate, thus outputting power.

[0048] The present invention discloses a method for paralleling a first gear in a multi-gear planetary gear system transmission device for a hybrid vehicle, the method comprising the following steps:

[0049] S1: Make the rear motor and engine both work, make the first clutch and the third clutch engaged, make the second clutch disengaged, and make the front motor non-working.

[0050] S2: Start the rear motor to drive the second sun gear to rotate;

[0051] S3: The second sun gear drives the second planetary gear to rotate;

[0052] S4: The second planetary gear drives the second planetary carrier to rotate;

[0053] S5: The second planetary carrier drives the third external gear ring to rotate;

[0054] S6: The third external gear ring drives the third planetary gear to rotate;

[0055] S7: The third planetary gear drives the third planetary carrier to rotate;

[0056] S8: The engine transmits power to the input shaft;

[0057] S9: The input shaft drives the third planetary carrier to rotate via the first clutch;

[0058] S10: The third planetary carrier drives the output shaft to rotate, thus outputting power.

[0059] The present invention discloses a parallel two-gear transmission method for a planetary gear system multi-gear hybrid vehicle transmission device, the method comprising the following steps:

[0060] S1: Make the rear motor and engine both work, make the first clutch and the second clutch engaged, make the third clutch disengaged, and make the front motor non-working.

[0061] S2: Start the rear motor to drive the second sun gear to rotate;

[0062] S3: The second sun gear drives the second planetary gear to rotate;

[0063] S4: The second planetary gear drives the second planetary carrier and the second external gear ring to rotate simultaneously;

[0064] S5: The second planetary carrier drives the third external gear ring to rotate, the third external gear ring drives the third planetary gear to rotate, the third planetary gear drives the third planetary carrier to rotate; at the same time, the second external gear ring drives the third planetary carrier to rotate through the second clutch;

[0065] S6: The engine transmits power to the input shaft;

[0066] S7: The input shaft drives the third planetary carrier to rotate via the first clutch;

[0067] S8: The third planetary carrier drives the output shaft to rotate, thus outputting power.

[0068] The present invention discloses a direct-drive transmission method for a planetary gear system multi-gear hybrid vehicle transmission, the method comprising the following steps:

[0069] S1: Make all the engines work, make the first clutch, the second clutch and the third clutch disengaged, and make the front motor and the rear motor non-working.

[0070] S2: The engine transmits power to the input shaft;

[0071] S3: The input shaft drives the output shaft to rotate through the first clutch, thereby outputting power.

[0072] The present invention discloses a method for the regenerative braking gear in a multi-gear hybrid vehicle transmission system with a planetary gear train, the method comprising the following steps:

[0073] S1: Put the rear motor into working state, put the third clutch into engaged state, put the first clutch and the second clutch into disengaged state, and put the front motor and the engine into non-working state.

[0074] S2: The output shaft drives the third planetary carrier to rotate;

[0075] S3: The third planetary carrier drives the third external gear ring to rotate;

[0076] S4: The third external gear ring drives the second planetary carrier to rotate;

[0077] S5: The second planetary carrier drives the second planetary gear to rotate;

[0078] S6: The second planetary gear drives the second sun gear to rotate;

[0079] S7: The second sun gear drives the rotor of the rear motor to rotate, storing energy in the battery.

[0080] The present invention discloses a transmission method for an idle speed generator gear in a planetary gear system multi-gear hybrid vehicle transmission device, the method comprising the following steps:

[0081] S1: The front motor and engine are both in working state, the first clutch, the second clutch and the third clutch are all in disengaged state, and the rear motor is in non-working state.

[0082] S2: The engine transmits power to the input shaft;

[0083] S3: The input shaft drives the first planetary carrier to rotate;

[0084] S4: The first planetary carrier drives the first planetary gear to rotate;

[0085] S5: The first planetary gear drives the first sun gear to rotate;

[0086] S6: The first sun gear drives the rotor of the front motor to rotate, storing energy in the battery.

[0087] Compared with the prior art, the beneficial effects of the present invention are:

[0088] This invention features a compact structure, convenient control, low component cost and low processing difficulty, multiple clutch and planetary gear combination types, simple assembly, fewer parts, and the ability to achieve large speed ratio changes and a wide transmission ratio range. It is characterized by a reasonable structure, simple assembly, multiple achievable modes, and high cost-effectiveness, making it easy to use and promote. Furthermore, the staggered arrangement of the motor, clutch, and planetary gear system effectively improves the efficiency of the transmission device and optimizes responsiveness and smoothness. Attached Figure Description

[0089] Figure 1 This is a simplified structural diagram of the present invention;

[0090] Figure 2 This is a simplified structural diagram of the EV1 gear of the present invention;

[0091] Figure 3 This is a simplified structural diagram of the EV2 gear of the present invention;

[0092] Figure 4 This is a simplified structural diagram of the present invention with one gear connected in series;

[0093] Figure 5 This is a simplified structural diagram of the two-stage series connection of the present invention;

[0094] Figure 6 This is a simplified structural diagram of the present invention with one parallel step;

[0095] Figure 7 This is a simplified structural diagram of the parallel two-stage design of the present invention;

[0096] Figure 8 This is a simplified structural diagram of the direct drive gear of the present invention;

[0097] Figure 9 This is a simplified structural diagram of the regenerative braking gear of the present invention;

[0098] Figure 10 This is a simplified structural diagram of the idle speed generator switch of the present invention;

[0099] Figure 11 This is a schematic diagram of the lever principle of the present invention;

[0100] Figure 12 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0101] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0102] A multi-speed hybrid vehicle transmission with planetary gear system includes an input shaft 51, a housing 52, a front motor 53, a rear motor 54, an output shaft 55, a first clutch 41, a second clutch 42, a third clutch 43, a first planetary gear system, a second planetary gear system, and a third planetary gear system; the housing 52, the front motor 53, the rear motor 54, the first clutch 41, the second clutch 42, the third clutch 43, the first planetary gear system, the second planetary gear system, and the third planetary gear system are all mounted on the outside of the input shaft 51 and the output shaft 55. The input end of the input shaft 51 is connected to the engine and serves as the input to the transmission device. The output end of the input shaft 51 is connected to the front motor 53 through the first planetary gear train. The input shaft 51 is also connected to the output shaft 55 through the first clutch 41. The output shaft 55 is connected to the third planetary gear train. The third planetary gear train is connected to the second clutch 42 and the second planetary gear train. The second clutch 42 and the second planetary gear train are both connected to the third clutch 43. The second planetary gear train is connected to the rear motor 54. The stator of the front motor 53, the stator of the rear motor 54, the third clutch 43, the first planetary gear train, and the third planetary gear train are all connected to the housing 52.

[0103] The first planetary gear train includes a first sun gear 11, a first planet gear 12, a first planet carrier 13, and a first external gear ring 14. The first planet carrier 13 is fixedly connected to the input shaft 51 and the first clutch 41, and the first planet gear 12 is provided on the first planet carrier 13. The first planet gear 12 is meshed with the first sun gear 11 and the first external gear ring 14. The first external gear ring 14 is fixedly installed on the housing 52. The first sun gear 11 is connected to the rotor of the front motor 53.

[0104] The third planetary gear train includes a third sun gear 31, a third planet gear 32, a third planet carrier 33, and a third external gear ring 34. The third planet carrier 33 is fixedly connected to the output shaft 55 and the second clutch 42, and the third planet gear 32 is provided on the third planet carrier 33. The third planet gear 32 is meshed with the third sun gear 31 and the third external gear ring 34. The third external gear ring 34 is connected to the second planet gear, and the third sun gear 31 is connected to the housing 52.

[0105] The second planetary gear train includes a second sun gear 21, a second planet gear 22, a second planet carrier 23, and a second external gear ring 24; the second planet carrier 23 is fixedly connected to the third external gear ring 34, and the second planet gear 22 is provided on the second planet carrier 23. The second planet gear 22 is meshed with the second sun gear 21 and the second external gear ring 24. The second external gear ring 24 is connected to the second clutch 42 and the third clutch 43. The second sun gear 21 is connected to the rotor of the rear motor 54.

[0106] This invention achieves different speed ratios of the second planetary gear system and the third planetary gear system through different combinations of the first clutch 41, the second clutch 42 and the third clutch 43, and different working states of the engine, the front motor 53 and the rear motor 54. It can realize EV1 gear, series first gear, EV2 gear, series second gear, parallel first gear, parallel second gear, direct drive gear, regenerative braking gear and idle speed power generation gear.

[0107] The present invention discloses a transmission method for the EV1 gear of a multi-gear hybrid vehicle transmission system with a planetary gear train, the method comprising the following steps:

[0108] S1: The front motor 53 and the engine are put into a non-working state, the first clutch 41 and the second clutch 42 are put into a disengaged state, the third clutch 43 is put into a engaged state, and the rear motor 54 is put into a working state.

[0109] S2: Start the rear motor 54 to drive the second sun gear 21 to rotate;

[0110] S3: Since the third clutch 43 fixes the second external gear ring 24, the second sun gear 21 drives the second planet gear 22 to rotate;

[0111] S4: The second planetary gear 22 drives the second planetary carrier 23 to rotate;

[0112] S5: The second planetary carrier 23 drives the third external gear ring 34 to rotate;

[0113] S6: Since the third sun gear 31 is fixed on the housing 52, the third external gear ring 34 drives the third planet gear 32 to rotate;

[0114] S7: The third planetary gear 32 drives the third planetary carrier 33 to rotate;

[0115] S8: The third planetary carrier 33 drives the output shaft 55 to rotate, thus outputting power.

[0116] The present invention discloses a transmission method for the EV2 gear of a planetary gear system multi-gear hybrid vehicle transmission device, the method comprising the following steps:

[0117] S1: The front motor 53 and the engine are put into a non-working state, the first clutch 41 and the third clutch 43 are put into a disengaged state, the second clutch 42 is put into a engaged state, and the rear motor 54 is put into a working state; the second planetary gear train and the third planetary gear train are driven at a fixed speed ratio.

[0118] S2: Start the rear motor 54 to drive the second sun gear 21 to rotate;

[0119] S3: The second sun gear 21 drives the second planet gear 22 to rotate;

[0120] S4: The second planetary gear 22 drives the second planetary carrier 23 and the second external gear ring 24 to rotate simultaneously;

[0121] S5: The second planetary carrier 23 drives the third external gear ring 34 to rotate. Since the third sun gear 31 is fixed on the housing 52, the third external gear ring 34 drives the third planet gear 32 to rotate, and the third planet gear 32 drives the third planetary carrier 33 to rotate. At the same time, the second external gear ring 24 drives the third planetary carrier 33 to rotate through the second clutch 42.

[0122] S6: The third planetary carrier 33 drives the output shaft 55 to rotate, thus outputting power.

[0123] The present invention discloses a method for cascading a first gear in a multi-gear planetary gear system transmission for a hybrid vehicle, the method comprising the following steps:

[0124] S1: The front motor 53, the rear motor 54 and the engine are all in working state, the first clutch 41 and the second clutch 42 are in disengaged state, and the third clutch 43 is in engaged state.

[0125] S2: Start the engine to drive the input shaft 51 to rotate;

[0126] S3: The input shaft 51 drives the first planetary carrier 13 to rotate;

[0127] S4: Since the first external gear ring 14 is fixed on the housing 52, the first planet carrier 13 drives the first planet gear 12 to rotate;

[0128] S5: The first planetary gear 12 drives the first sun gear 11 to rotate;

[0129] S6: The first sun gear 11 drives the rotor of the front motor 53 to rotate, storing energy in the battery;

[0130] S7: The rear motor 54 receives energy from the battery to drive the second sun gear 21 to rotate;

[0131] S8: Since the third clutch 43 fixes the second outer gear ring 24, the second sun gear 21 drives the second planet gear 22 to rotate;

[0132] S9: The second planetary gear 22 drives the second planetary carrier 23 to rotate;

[0133] S10: The second planetary carrier 23 drives the third external gear ring 34 to rotate;

[0134] S11: Since the third sun gear 31 is fixed on the housing 52, the third external gear ring 34 drives the third planet gear 32 to rotate;

[0135] S12: The third planetary gear 32 drives the third planetary carrier 33 to rotate;

[0136] S13: The third planetary carrier 33 drives the output shaft 55 to rotate, thus outputting power.

[0137] The present invention discloses a method for a series two-gear transmission in a planetary gear system multi-gear hybrid vehicle transmission device, the method comprising the following steps:

[0138] S1: The front motor 53, the rear motor 54 and the engine are all in working state, the first clutch 41 and the third clutch 43 are in disengaged state, and the second clutch 42 is in engaged state.

[0139] S2: Start the engine to drive the input shaft 51 to rotate;

[0140] S3: The input shaft 51 drives the first planetary carrier 13 to rotate;

[0141] S4: Since the first external gear ring 14 is fixed on the housing 52, the first planet carrier 13 drives the first planet gear 12 to rotate;

[0142] S5: The first planetary gear 12 drives the first sun gear 11 to rotate;

[0143] S6: The first sun gear 11 drives the rotor of the front motor 53 to rotate, storing energy in the battery;

[0144] S7: The rear motor 54 receives energy from the battery to drive the second sun gear 21 to rotate;

[0145] S8: The second sun gear 21 drives the second planet gear 22 to rotate;

[0146] S9: The second planetary gear 22 drives the second planetary carrier 23 and the second external gear ring 24 to rotate simultaneously;

[0147] S10: The second planetary carrier 23 drives the third external gear ring 34 to rotate. Since the third sun gear 31 is fixed on the housing 52, the third external gear ring 34 drives the third planet gear 32 to rotate, and the third planet gear 32 drives the third planetary carrier 33 to rotate. At the same time, the second external gear ring 24 drives the third planetary carrier 33 to rotate through the second clutch 42.

[0148] S11: The third planetary carrier 33 drives the output shaft 55 to rotate, thus outputting power.

[0149] The present invention discloses a method for paralleling a first gear in a multi-gear planetary gear system transmission device for a hybrid vehicle, the method comprising the following steps:

[0150] S1: Both the rear motor 54 and the engine are in working state, working together as the power output of the transmission device; the first clutch 41 and the third clutch 43 are in the engaged state, the second clutch 42 is in the disengaged state, and the front motor 53 is in the non-working state.

[0151] S2: Start the rear motor 54 to drive the second sun gear 21 to rotate;

[0152] S3: Since the third clutch 43 fixes the second external gear ring 24, the second sun gear 21 drives the second planet gear 22 to rotate;

[0153] S4: The second planetary gear 22 drives the second planetary carrier 23 to rotate;

[0154] S5: The second planetary carrier 23 drives the third external gear ring 34 to rotate;

[0155] S6: Since the third sun gear 31 is fixed on the housing 52, the third external gear ring 34 drives the third planet gear 32 to rotate;

[0156] S7: The third planetary gear 32 drives the third planetary carrier 33 to rotate;

[0157] S8: The engine transmits power to the input shaft 51;

[0158] S9: The input shaft 51 drives the third planetary carrier 33 to rotate through the first clutch 41;

[0159] S10: The third planetary carrier 33 drives the output shaft 55 to rotate, thus outputting power.

[0160] The present invention discloses a parallel two-gear transmission method for a planetary gear system multi-gear hybrid vehicle transmission device, the method comprising the following steps:

[0161] S1: Both the rear motor 54 and the engine are in working condition, working together as the power output of the transmission device; the first clutch 41 and the second clutch 42 are in the engaged state, the third clutch 43 is in the disengaged state, and the front motor 53 is in the non-working state.

[0162] S2: Start the rear motor 54 to drive the second sun gear 21 to rotate;

[0163] S3: The second sun gear 21 drives the second planet gear 22 to rotate;

[0164] S4: The second planetary gear 22 drives the second planetary carrier 23 and the second external gear ring 24 to rotate simultaneously;

[0165] S5: The second planetary carrier 23 drives the third external gear ring 34 to rotate. Since the third sun gear 31 is fixed on the housing 52, the third external gear ring 34 drives the third planet gear 32 to rotate, and the third planet gear 32 drives the third planetary carrier 33 to rotate. At the same time, the second external gear ring 24 drives the third planetary carrier 33 to rotate through the second clutch 42.

[0166] S6: The engine transmits power to the input shaft 51;

[0167] S7: The input shaft 51 drives the third planetary carrier 33 to rotate through the first clutch 41;

[0168] S8: The third planetary carrier 33 drives the output shaft 55 to rotate, thus outputting power.

[0169] The present invention discloses a direct-drive transmission method for a planetary gear system multi-gear hybrid vehicle transmission, the method comprising the following steps:

[0170] S1: Make all the engines work, make the first clutch 41, the second clutch 42 and the third clutch 43 disengaged, and make the front motor 53 and the rear motor 54 non-working.

[0171] S2: The engine transmits power to the input shaft 51;

[0172] S3: The input shaft 51 drives the output shaft 55 to rotate through the first clutch 41, thereby outputting power.

[0173] The present invention discloses a method for the regenerative braking gear in a multi-gear hybrid vehicle transmission system with a planetary gear train, the method comprising the following steps:

[0174] S1: The rear motor 54 is put into operation, the third clutch 43 is engaged, the first clutch 41 and the second clutch 42 are disengaged, and the front motor 53 and the engine are both in a non-operating state.

[0175] S2: The output shaft 55 drives the third planetary carrier 33 to rotate;

[0176] S3: Since the third sun gear 31 is fixed on the housing 52, the third planet carrier 33 drives the third external gear ring 34 to rotate;

[0177] S4: The third external gear ring 34 drives the second planetary carrier 23 to rotate;

[0178] S5: Since the third clutch 43 fixes the second external gear ring 24, the second planetary carrier 23 drives the second planetary gear 22 to rotate;

[0179] S6: The second planetary gear 22 drives the second sun gear 21 to rotate;

[0180] S7: The second sun gear 21 drives the rotor of the rear motor 54 to rotate, storing energy in the battery.

[0181] The present invention discloses a transmission method for an idle speed generator gear in a planetary gear system multi-gear hybrid vehicle transmission device, the method comprising the following steps:

[0182] S1: The front motor 53 and the engine are both in working state, the first clutch 41, the second clutch 42 and the third clutch 43 are all in disengaged state, and the rear motor 54 is in non-working state.

[0183] S2: The engine transmits power to the input shaft 51;

[0184] S3: The input shaft 51 drives the first planetary carrier 13 to rotate;

[0185] S4: Since the first external gear ring 14 is fixed on the housing 52, the first planet carrier 13 drives the first planet gear 12 to rotate;

[0186] S5: The first planetary gear 12 drives the first sun gear 11 to rotate;

[0187] S6: The first sun gear 11 drives the rotor of the front motor 53 to rotate, storing energy in the battery.

[0188] This invention can realize various power combinations of engines and motors, and can give full play to the advantages of each engine and motor. It can meet the range requirements like traditional fuel vehicles with low infrastructure requirements, and can also meet the economic requirements like pure electric vehicles, balancing various needs. The multi-planetary gear system can achieve a large speed ratio change. Under the conditions of limited space and fewer parts, different power combination modes can be realized with the cooperation of the clutch.

[0189] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0190] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A planetary gear system multi-gear hybrid vehicle transmission device, characterized in that: The system includes an input shaft (51), a housing (52), a front motor (53), a rear motor (54), an output shaft (55), a first clutch (41), a second clutch (42), a third clutch (43), a first planetary gear train, a second planetary gear train, and a third planetary gear train. The input end of the input shaft (51) is connected to the engine, and the output end of the input shaft (51) is connected to the front motor (53) via the first planetary gear train. The input shaft (51) is also connected to the output shaft (55) via the first clutch (41). The output shaft (55) is connected to the third planetary gear train, which is connected to the second clutch (42) and the second planetary gear train. (42) and the second planetary gear train are both connected to the third clutch (43). The second planetary gear train is connected to the rear motor (54). The stator of the front motor (53), the stator of the rear motor (54), the third clutch (43), the first planetary gear train and the third planetary gear train are all connected to the housing (52). The first planetary gear train includes a first sun gear (11), a first planetary gear (12), a first planetary carrier (13) and a first external gear ring (14). The first planetary carrier (13) is fixedly connected to the input shaft (51) and the first clutch (41), and the first planetary gear (12) is provided on the first planetary carrier (13). The first planetary gear (12) is connected to the first sun gear (51) and the first external gear ring (14). The sun gear (11) and the first external gear ring (14) are meshed together. The first external gear ring (14) is fixedly mounted on the housing (52). The first sun gear (11) is connected to the rotor of the front motor (53). The third planetary gear system includes a third sun gear (31), a third planet gear (32), a third planet carrier (33), and a third external gear ring (34). The third planet carrier (33) is fixedly connected to the output shaft (55) and the second clutch (42). The third planet carrier (33) is provided with a third planet gear (32). The third planet gear (32) is meshed with the third sun gear (31) and the third external gear ring (34). The second planetary gear system includes a second sun gear (21), a second planetary gear (22), a second planetary carrier (23), and a second external gear ring (24). The second planetary carrier (23) is fixedly connected to the third external gear ring (34), and the second planetary gear (22) is provided on the second planetary carrier (23). The second planetary gear (22) is meshed with the second sun gear (21) and the second external gear ring (24). The second external gear ring (24) is connected to the second clutch (42) and the third clutch (43). The second sun gear (21) is connected to the rotor of the rear motor (54).

2. A transmission method for the EV1 gear of a planetary gear system multi-gear hybrid vehicle transmission device according to claim 1, characterized in that: The method includes the following steps: S1: The front motor (53) and the engine are put into a non-working state, the first clutch (41) and the second clutch (42) are put into a disengaged state, the third clutch (43) is put into a engaged state, and the rear motor (54) is put into a working state. S2: Start the rear motor (54) to drive the second sun gear (21) to rotate; S3: The second sun gear (21) drives the second planet gear (22) to rotate; S4: The second planetary gear (22) drives the second planetary carrier (23) to rotate; S5: The second planetary carrier (23) drives the third external gear ring (34) to rotate; S6: The third external gear ring (34) drives the third planetary gear (32) to rotate; S7: The third planetary gear (32) drives the third planetary carrier (33) to rotate; S8: The third planetary carrier (33) drives the output shaft (55) to rotate, thus outputting power.

3. A transmission method for the EV2 gear of a planetary gear system multi-gear hybrid vehicle transmission device according to claim 1, characterized in that: The method includes the following steps: S1: The front motor (53) and the engine are put into a non-working state, the first clutch (41) and the third clutch (43) are put into a disengaged state, the second clutch (42) is put into a engaged state, and the rear motor (54) is put into a working state. S2: Start the rear motor (54) to drive the second sun gear (21) to rotate; S3: The second sun gear (21) drives the second planet gear (22) to rotate; S4: The second planetary gear (22) drives the second planetary carrier (23) and the second external gear ring (24) to rotate simultaneously; S5: The second planetary carrier (23) drives the third external gear ring (34) to rotate, the third external gear ring (34) drives the third planetary gear (32) to rotate, and the third planetary gear (32) drives the third planetary carrier (33) to rotate; at the same time, the second external gear ring (24) drives the third planetary carrier (33) to rotate through the second clutch (42); S6: The third planetary carrier (33) drives the output shaft (55) to rotate, thus outputting power.

4. A transmission method for connecting one gear in series in a multi-gear hybrid vehicle transmission device with a planetary gear system according to claim 1, characterized in that: The method includes the following steps: S1: The front motor (53), the rear motor (54) and the engine are all in working state, the first clutch (41) and the second clutch (42) are in disengaged state, and the third clutch (43) is in engaged state. S2: Start the engine to drive the input shaft (51) to rotate; S3: The input shaft (51) drives the first planetary carrier (13) to rotate; S4: The first planetary carrier (13) drives the first planetary gear (12) to rotate; S5: The first planetary gear (12) drives the first sun gear (11) to rotate; S6: The first sun gear (11) drives the rotor of the front motor (53) to rotate, storing energy in the battery; S7: The rear motor (54) receives energy from the battery to drive the second sun gear (21) to rotate; S8: The second sun gear (21) drives the second planet gear (22) to rotate; S9: The second planetary gear (22) drives the second planetary carrier (23) to rotate; S10: The second planetary carrier (23) drives the third external gear ring (34) to rotate; S11: The third external gear ring (34) drives the third planetary gear (32) to rotate; S12: The third planetary gear (32) drives the third planetary carrier (33) to rotate; S13: The third planetary carrier (33) drives the output shaft (55) to rotate, thus outputting power.

5. A transmission method for a series two-gear transmission device of a planetary gear system multi-gear hybrid vehicle according to claim 1, characterized in that: The method includes the following steps: S1: The front motor (53), the rear motor (54) and the engine are all in working state, the first clutch (41) and the third clutch (43) are in disengaged state, and the second clutch (42) is in engaged state. S2: Start the engine to drive the input shaft (51) to rotate; S3: The input shaft (51) drives the first planetary carrier (13) to rotate; S4: The first planetary carrier (13) drives the first planetary gear (12) to rotate; S5: The first planetary gear (12) drives the first sun gear (11) to rotate; S6: The first sun gear (11) drives the rotor of the front motor (53) to rotate, storing energy in the battery; S7: The rear motor (54) receives energy from the battery to drive the second sun gear (21) to rotate; S8: The second sun gear (21) drives the second planet gear (22) to rotate; S9: The second planetary gear (22) drives the second planetary carrier (23) and the second external gear ring (24) to rotate simultaneously; S10: The second planetary carrier (23) drives the third external gear ring (34) to rotate, the third external gear ring (34) drives the third planetary gear (32) to rotate, and the third planetary gear (32) drives the third planetary carrier (33) to rotate; at the same time, the second external gear ring (24) drives the third planetary carrier (33) to rotate through the second clutch (42); S11: The third planetary carrier (33) drives the output shaft (55) to rotate, thus outputting power.

6. A method for paralleling one gear in a multi-gear hybrid vehicle transmission device with a planetary gear system according to claim 1, characterized in that: The method includes the following steps: S1: The rear motor (54) and the engine are both in working state, the first clutch (41) and the third clutch (43) are in engaged state, the second clutch (42) is in disengaged state, and the front motor (53) is in non-working state. S2: Start the rear motor (54) to drive the second sun gear (21) to rotate; S3: The second sun gear (21) drives the second planet gear (22) to rotate; S4: The second planetary gear (22) drives the second planetary carrier (23) to rotate; S5: The second planetary carrier (23) drives the third external gear ring (34) to rotate; S6: The third external gear ring (34) drives the third planetary gear (32) to rotate; S7: The third planetary gear (32) drives the third planetary carrier (33) to rotate; S8: The engine transmits power to the input shaft (51); S9: The input shaft (51) drives the third planetary carrier (33) to rotate through the first clutch (41); S10: The third planetary carrier (33) drives the output shaft (55) to rotate, thus outputting power.

7. A method for parallel two-gear transmission of a planetary gear system multi-gear hybrid vehicle transmission device according to claim 1, characterized in that: The method includes the following steps: S1: The rear motor (54) and the engine are both in working state, the first clutch (41) and the second clutch (42) are in engaged state, the third clutch (43) is in disengaged state, and the front motor (53) is in non-working state. S2: Start the rear motor (54) to drive the second sun gear (21) to rotate; S3: The second sun gear (21) drives the second planet gear (22) to rotate; S4: The second planetary gear (22) drives the second planetary carrier (23) and the second external gear ring (24) to rotate simultaneously; S5: The second planetary carrier (23) drives the third external gear ring (34) to rotate, the third external gear ring (34) drives the third planetary gear (32) to rotate, and the third planetary gear (32) drives the third planetary carrier (33) to rotate; at the same time, the second external gear ring (24) drives the third planetary carrier (33) to rotate through the second clutch (42); S6: The engine transmits power to the input shaft (51); S7: The input shaft (51) drives the third planetary carrier (33) to rotate through the first clutch (41); S8: The third planetary carrier (33) drives the output shaft (55) to rotate, thus outputting power.

8. A method for transmitting a direct-drive gear in a planetary gear train multi-gear hybrid vehicle transmission according to claim 1, characterized in that: The method includes the following steps: S1: Make all the engines work, make the first clutch (41), the second clutch (42) and the third clutch (43) disengaged, and make the front motor (53) and the rear motor (54) non-working. S2: The engine transmits power to the input shaft (51); S3: The input shaft (51) drives the output shaft (55) to rotate through the first clutch (41) to output power.

9. A transmission method for the regenerative braking gear in a multi-gear hybrid vehicle transmission system according to claim 1, characterized in that: The method includes the following steps: S1: The rear motor (54) is put into operation, the third clutch (43) is engaged, the first clutch (41) and the second clutch (42) are disengaged, and the front motor (53) and the engine are both in a non-operating state. S2: The output shaft (55) drives the third planetary carrier (33) to rotate; S3: The third planetary carrier (33) drives the third external gear ring (34) to rotate; S4: The third external gear ring (34) drives the second planetary carrier (23) to rotate; S5: The second planetary carrier (23) drives the second planetary gear (22) to rotate; S6: The second planetary gear (22) drives the second sun gear (21) to rotate; S7: The second sun gear (21) drives the rotor of the rear motor (54) to rotate, storing energy in the battery.

10. A transmission method for the idle speed generator gear of a multi-gear hybrid vehicle transmission device with planetary gear system according to claim 1, characterized in that: The method includes the following steps: S1: The front motor (53) and the engine are both in working state, the first clutch (41), the second clutch (42) and the third clutch (43) are all in disengaged state, and the rear motor (54) is in non-working state. S2: The engine transmits power to the input shaft (51); S3: The input shaft (51) drives the first planetary carrier (13) to rotate; S4: The first planetary carrier (13) drives the first planetary gear (12) to rotate; S5: The first planetary gear (12) drives the first sun gear (11) to rotate; S6: The first sun gear (11) drives the rotor of the front motor (53) to rotate, storing energy in the battery.

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