CN105459803B - Parallel transmission mechanism for hybrid electric vehicle - Google Patents

Parallel transmission mechanism for hybrid electric vehicle Download PDF

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Publication number
CN105459803B
CN105459803B CN201610002398.1A CN201610002398A CN105459803B CN 105459803 B CN105459803 B CN 105459803B CN 201610002398 A CN201610002398 A CN 201610002398A CN 105459803 B CN105459803 B CN 105459803B
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motor
transmission
speed change
engine
input shaft
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CN105459803A (en
Inventor
郝庆军
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Capotech Suzhou Co ltd
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Ekontrol Drive Suzhou Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
    • B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B60K2006/4808—Electric machine connected or connectable to gearbox output shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B60K2006/4825—Electric machine connected or connectable to gearbox input shaft
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Structure Of Transmissions (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a parallel transmission mechanism for a hybrid electric vehicle, which relates to the technical field of hybrid electric vehicles and comprises an engine driving system, a first speed change system and a second speed change system, wherein the engine driving system comprises an engine and an engine output shaft connected with the engine; the power transmission is carried out between the first speed change system and the second speed change system through the electric drive system connected in parallel, the first speed change system is connected with the engine drive system, and the second speed change system is connected with the transmission shaft of the vehicle.

Description

Parallel transmission mechanism for hybrid electric vehicle
Technical Field
The invention relates to the technical field of hybrid electric vehicles, in particular to a parallel transmission mechanism.
Background
In recent years, with the continuous development of the new energy automobile industry, the hybrid electric vehicle has been promoted in the market because of the advantages of the internal combustion automobile and the low emission.
In the prior art, new energy automobiles commonly adopt series, parallel or series-parallel power systems, and the energy is efficiently utilized and recovered mainly through analysis and distribution of the characteristics and the efficiency interval of an engine and a motor, so that the efficiency of the whole system is improved.
Patent CN204774599U discloses a hybrid power system and a hybrid power vehicle, and by utilizing a middle locking clutch to cut off the power connection between a front planetary row and a rear planetary row, the vehicle can be in a pure electric or pure charging state according to the requirement, so as to improve the adaptability of the vehicle to different working conditions, and the vehicle has the defects of complex structure, complicated control system and higher cost; patent CN104175860a discloses a planetary hybrid power system, which uses different motors to control planetary rows separately, and uses mode clutches to switch between high and low modes, so as to avoid power loss, and the disadvantage is that power interruption phenomenon exists in the gear shifting process, so that the riding comfort of passengers is affected.
Disclosure of Invention
In order to solve the technical problems, the invention provides a parallel transmission mechanism for a hybrid electric vehicle, which is characterized in that an electric drive system is arranged between a first speed change system and a second speed change system, and the electric drive system and an engine drive system are utilized for combined driving to realize integral transmission.
The technical scheme of the invention is as follows:
the parallel transmission mechanism for the hybrid electric vehicle comprises an engine driving system, a first speed changing system, an electric driving system and a second speed changing system which are sequentially connected, wherein the engine driving system comprises an engine and an engine output shaft connected with the engine, the electric driving system is connected with the first speed changing system and the second speed changing system in parallel and can perform hybrid power driving or pure electric driving, the first speed changing system is connected with the engine driving system, the second speed changing system is connected with a transmission shaft of the vehicle, and in a hybrid power mode, the first speed changing system and the second speed changing system can synchronously operate through the combined driving of the engine and the motor, and the output end of the second speed changing system is connected with a transmission shaft of the vehicle and can provide power for the vehicle; in a pure electric mode, the engine and the first speed change system are in a static state, and the electric drive system can directly provide power output for the second speed change system; more importantly, the electric drive system can reversely drag the engine to drive the engine to reach the required rotating speed so as to finish starting.
Preferably, the electric drive system comprises a motor, a motor input shaft and a motor output shaft, wherein the motor input shaft and the motor output shaft are positioned at two sides of the motor, the motor input shaft is connected with the output end of the first speed change system, the motor input end is connected with the input end of the second speed change system, and the motor is used as a connecting piece between the first speed change system and the second speed change system, so that the direct control of the second speed change system can be realized, the power of the first speed change system can be transmitted, and the power can be output to the engine when necessary, so that the engine is driven to be quickly lifted to the required rotating speed.
Further, the first speed change system and the second speed change system comprise a box body, a speed change gear input shaft, a sun gear, a planet gear and a gear ring, wherein the speed change gear input shaft is connected with the sun gear in a shaft mode, the sun gear is meshed with the planet gear, and the gear ring is meshed with the planet gear and is output outwards through a gear ring output shaft; the planetary wheel shaft is connected with a planetary carrier, and the planetary carrier is connected with the transmission input shaft and the box body through clutches respectively; the gear ring output shaft on the first speed change system is connected with the motor input shaft, and the transmission input shaft on the second speed change system is connected with the motor output shaft.
Further, the engine output shaft is connected with a hydraulic torque converter, and the hydraulic torque converter is provided with a hydraulic torque converter output shaft. The torque converter output shaft is coupled to a transmission input shaft on the first transmission system.
Preferably, the first gear ring output shaft on the first speed change system is connected with the motor input shaft, and the transmission input shaft on the second speed change system is connected with the motor output shaft through a spline, so that stable connection can be realized, and power loss is reduced.
Preferably, the clutch is a wet clutch.
The invention sets the transmission mechanism as four modules of an engine driving system, a first speed changing system, an electric driving system and a second speed changing system, and can jointly drive the first speed changing system and the second speed changing system through the engine driving system and the electric driving system; the second speed change system can be directly driven through the electric drive system, and the first speed change system and the engine drive system are in idle states at the moment.
The beneficial effects are that: through the technical scheme, the invention has the following technical advantages:
1. by adopting the first speed change system and the second speed change system, power interruption can not be generated in the gear shifting process, gear shifting smoothness is realized, and driving safety is improved;
2. the electric drive system is utilized to realize speed and torque change, and the first speed change system and the second speed change system are driven by the electric drive system and the engine drive system in a combined mode, so that larger starting torque can be provided, and meanwhile, the dynamic property is effectively ensured;
3. compared with the traditional hybrid power system, the electric drive system and the engine drive system provided by the invention can be started simultaneously by adopting the process of starting the engine and closing the clutch, so that the combined drive is realized, and the electric drive system has the advantage of quick response time;
4. the 3-gear or 4-gear speed change system can be realized in a combined way by adopting the combined structure of the first speed change system and the second speed change system, and the device has the characteristics of simple structure and strong flexibility.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a parallel transmission mechanism for a hybrid electric vehicle according to an embodiment of the present invention.
Corresponding part names are indicated by numerals and letters in the drawings:
1. an engine, 2, an engine output shaft; 3. a torque converter; 4. a torque converter output shaft; 5. a first transmission system; 51. a first transmission input shaft; 52. a first sun gear; 53. a first planet; 54. a first planet carrier; 55. a first wet clutch; 56. a second wet clutch; 57. a first ring gear; 58. a first ring gear output shaft; 6. a second transmission system; 61. a second transmission input shaft; 62. a second sun gear; 63. a second planet wheel; 64. a second carrier; 65. a third wet clutch; 66. a fourth wet clutch; 67. a second ring gear; 68. a second ring gear output shaft; 7. an electric drive system; 71. A motor input shaft; 72. a motor; 73. an output shaft of the motor; 8. And a transmission shaft.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
A parallel transmission mechanism for a hybrid electric vehicle comprises an engine driving system, a first speed changing system, an electric driving system and a second speed changing system which are connected in sequence.
The engine driving system comprises an engine 1 and an engine output shaft 2 connected with the engine 1, an electric drive system 7 is connected between the first speed change system 5 and the second speed change system 6, the first speed change system 5 is connected with the engine driving system, the second speed change system 6 is connected with a transmission shaft 8 of a vehicle, so that the engine 1 can directly transmit power to the first speed change system 5 and the second speed change system 6 after being started and finally transmit power to the transmission shaft 8 of the vehicle, and the electric drive system 7 can independently control the second speed change system 6 to form a pure electric drive mode through the combined action of the engine 1 and the electric drive system 7.
The electric drive system 7 comprises a motor 72, a motor input shaft 71 and a motor output shaft 73 which are positioned on two sides of the motor 72, wherein the motor input shaft 71 is connected with the output end of the first speed change system 5, and the motor input end is connected with the input end of the second speed change system 6.
The first transmission system 5 includes a first case, a first transmission input shaft 51, a first sun gear 52, a first planet gear 53, and a first ring gear 57, the first transmission input shaft 51 is in shaft connection with the first sun gear 52, the first sun gear 52 is meshed with the first planet gear 53, the first ring gear 57 is meshed with the first planet gear 53, and is output outwards through a first ring gear output shaft 58; a carrier is connected to the first planetary gear 53 in a shaft manner, the first carrier 54 is connected to the first case through a first wet clutch 55, and the first carrier 54 is connected to the first transmission input shaft 51 through a second wet clutch 56; the first ring gear output shaft 58 is connected to the motor input shaft 71.
The second transmission system 6 includes a second case, a second transmission input shaft 61, a second sun gear 62, a second planet gear 63, and a second ring gear, where the second transmission input shaft 61 is journaled with the second sun gear 62, the second sun gear 62 is meshed with the second planet gear 63, and the second ring gear is meshed with the second planet gear 63 and output outwards through a second ring gear output shaft 68; a second planet carrier 64 is connected to the second planet gear 63 in a shaft manner, the second planet carrier 64 is connected to the second transmission input shaft 61 through a third wet clutch 65, and the second planet carrier 64 is connected to the second case through a fourth wet clutch 66; the second transmission input shaft 61 is connected to the motor output shaft 73, and the second ring gear output shaft 68 is connected to the drive shaft 8 of the vehicle via a flange plate.
In this embodiment, a torque converter 3 is connected to the engine output shaft 2, a torque converter output shaft 4 is connected to the torque converter 3, the torque converter output shaft 4 is connected to a first transmission input shaft 51 of the first transmission system 5, and after the engine 1 is started, power can be transmitted through the engine output shaft 2 and transmitted to the first transmission input shaft 51 through the torque converter output shaft 4 of the torque converter; at the same time, the torque converter 3 enables the first transmission system 5 to perform torque adjustment, so that the first transmission system 5 is ensured to be provided with proper power.
The first transmission input shaft 51 transmits power to the first sun gear 52, the power can be transmitted to the first planet gears 53 through the first sun gear 52, the power is output outwards through the first gear ring 57 and then is output outwards through the first gear ring output shaft 58, the first gear ring output shaft 58 is connected with the motor input shaft 71, and the power is transmitted outwards from the motor output shaft 73 through the motor; the motor output shaft 73 is connected to the second transmission input shaft 61, and is capable of transmitting power to the second sun gear 62 through the second transmission input shaft 61, and is capable of transmitting power to the transmission shaft 8 through the second sun gear 62, the second planetary gear 63, and the second ring gear in this order, and through the second ring gear output shaft 68 connected to the second ring gear, thereby powering the running of the vehicle.
In order to enable those skilled in the art to further understand the design concept of the present technical solution, the following details are set forth, and when the vehicle is in a stationary state and is in neutral, the engine may be implemented in the following two ways during the starting process: (1) Starter Start mode: the engine 1 is directly dragged by a starter to start, the engine 1 can transmit power to the hydraulic torque converter 3 through the engine output shaft 2, the power is transmitted to the first transmission input shaft 51 through the hydraulic torque converter output shaft 4, the first sun gear 52 can be driven to rotate through the first transmission input shaft 51, the first wet clutch 55 and the third wet clutch 65 are disconnected, the second wet clutch 56 and the fourth wet clutch 66 are closed, the first planet carrier 54 and the second planet carrier 64 are both in an idle state, and at the moment, the torque loss is small; (2) motor reverse start mode: the motor 72 is started, the motor can drive the motor input shaft 71 and the motor output shaft 73 to rotate, the motor input shaft 71 can drive the first gear ring 57, the first planet gears 53 and the first sun gear 52 to rotate, power is transmitted to the engine 1 through the first engine output shaft 2, when the rotating speed of the motor 72 reaches a certain fixed value, the engine 1 can be driven to a required rotating speed by a synchronous belt, oil injection or air injection starting is realized, the engine 1 is reversely towed and started through the motor 72, and power can be saved; meanwhile, the motor input shaft 71 transmits the rotating power to the second transmission input shaft 61, the second transmission input shaft 61 transmits the rotating power to the second sun gear 62, the third wet clutch 65 is opened, the fourth wet clutch 66 is closed, and the motor output shaft 73 can drive the second planetary gear 63 to idle.
In this technical solution, the motor 72 may be utilized to directly drive the motor, which is as follows: starting the motor 72, wherein the motor 72 can transmit power to the second transmission input shaft 61 through the motor output shaft 73, the second transmission input shaft 61 can drive the second sun gear 62 to rotate, the second planetary gear 63 drives the second gear ring to rotate, and the second gear ring output shaft 68 transmits power to the transmission shaft 8, so that the vehicle is directly driven to run through electric power, at the moment, the third wet clutch 65 is opened, the fourth wet clutch 66 is closed, the second speed change system 6 is in a low speed gear, and speed and torque can be reduced and increased; the third wet clutch 65 is closed, the fourth wet clutch 66 is opened, the transmission ratio of the transmission system is 1, the second transmission system 6 is in a high-speed gear, the first wet clutch 55 is kept in an open state during the process of directly driving the vehicle to run by the motor, the second wet clutch 56 is kept in a closed state, and at this time, the engine 1 drives the first sun gear 52 and the first planet gears 53 in the first transmission system 5 to idle.
In the process of directly driving by using the motor, when the torque provided by the motor 72 cannot meet the torque required by the vehicle, the motor 1 can be driven to run by the motor 72, the process is changed from the motor direct driving mode to the motor reverse start mode, and when the motor 72 and the motor 1 jointly drive the first speed change system 5 and the second speed change system 6, the torque can be adjusted and changed by the hydraulic torque converter 3, so as to meet the running requirement of the vehicle.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and improvements could be made by those skilled in the art without departing from the inventive concept, which falls within the scope of the present invention.

Claims (3)

1. The parallel transmission mechanism for the hybrid electric vehicle comprises an engine driving system, wherein the engine driving system comprises an engine and an engine output shaft connected with the engine, and is characterized by further comprising a first speed changing system and a second speed changing system, wherein power transmission is carried out between the first speed changing system and the second speed changing system through an electric drive system connected in parallel, the first speed changing system is connected with the engine driving system, and the second speed changing system is connected with a transmission shaft of the vehicle;
the electric drive system comprises a motor, a motor input shaft and a motor output shaft which are positioned at two sides of the motor, wherein the motor input shaft is connected with the output end of the first speed change system, and the motor output end is connected with the input end of the second speed change system;
the first speed change system and the second speed change system comprise a box body, a speed changer input shaft, a sun gear, a planetary gear and a gear ring, wherein the speed changer input shaft is connected with the sun gear in a shaft mode, the sun gear is meshed with the planetary gear, and the gear ring is meshed with the planetary gear and is output outwards through a gear ring output shaft; the planetary wheel shaft is connected with a planetary carrier, and the planetary carrier is connected with the transmission input shaft and the box body through clutches respectively; the gear ring output shaft on the first speed change system is connected with the motor input shaft, and the transmission input shaft on the second speed change system is connected with the motor output shaft;
the clutch is a wet clutch;
the first planet carrier of the first speed change system is connected with the first box body through a first wet clutch, and the first planet carrier is connected with the first transmission input shaft through a second wet clutch;
the second planet carrier of the first speed changing system is connected with the second box body through a third wet clutch, and the second planet carrier is connected with the second transmission input shaft through a fourth wet clutch.
2. A parallel transmission for a hybrid vehicle according to claim 1, wherein the engine output shaft is connected to a torque converter, the torque converter being connected to a torque converter output shaft, the torque converter output shaft being connected to the first transmission system.
3. The parallel transmission mechanism for a hybrid vehicle of claim 1, wherein the first ring gear output shaft on the first transmission system is splined to the motor input shaft and the transmission input shaft on the second transmission system is splined to the motor output shaft.
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CN108045222A (en) * 2017-12-25 2018-05-18 赵彬 A kind of tandem speed change combination driving device
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US20120270691A1 (en) * 2011-03-23 2012-10-25 Chrysler Group Llc Multi-mode electric drive hybrid transmission
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