CN108944410B - Hybrid coupling device, hybrid drive system, and hybrid vehicle - Google Patents

Hybrid coupling device, hybrid drive system, and hybrid vehicle Download PDF

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Publication number
CN108944410B
CN108944410B CN201710388247.9A CN201710388247A CN108944410B CN 108944410 B CN108944410 B CN 108944410B CN 201710388247 A CN201710388247 A CN 201710388247A CN 108944410 B CN108944410 B CN 108944410B
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planet carrier
planetary gear
gear set
clutch
ring
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CN108944410A (en
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朱福堂
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Robert Bosch GmbH
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Robert Bosch GmbH
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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
    • B60K6/22—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
    • B60K6/22—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
    • B60K6/24—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 combustion engines
    • 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
    • B60K6/26—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 motors or the generators
    • 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
    • B60K6/38—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 driveline clutches
    • 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

Abstract

The invention relates to an electromechanical hybrid coupling device, comprising: a first planetary gear set (3) having a first ring gear, a first carrier and a first sun gear; a second planetary gear set (4) having a second ring gear, a second carrier and a second sun gear; a rotating clutch (5); a first brake clutch (7); a second brake clutch (6); an output shaft (9); a stationary part, wherein the mechanical power source is connected to the first ring gear, the rotor of the electric machine (2) is connected to the second ring gear, the first sun gear is rigidly connected to the second planet carrier, the output shaft (9) is rigidly connected to the first planet carrier, the rotating clutch (5) is used for controlling the connection or disconnection between the first ring gear and the second sun gear, the first brake clutch (7) is used for controlling the connection or disconnection between the second sun gear and the stationary part, and the second brake clutch (6) is used for controlling the connection or disconnection between the second planet carrier and the stationary part.

Description

Hybrid coupling device, hybrid drive system, and hybrid vehicle
Technical Field
The present invention relates to a hybrid coupling device, a hybrid drive system including the hybrid coupling device, and a hybrid vehicle including the hybrid drive system.
Background
With the stricter environmental protection measures of countries around the world, more and more schemes for replacing fuel engine automobiles, such as hydrogen energy automobiles, fuel cell automobiles, hybrid electric automobiles and the like, are also increasing. Hybrid vehicles are currently the most practical. Hybrid drive systems are classified into series, parallel, series-parallel (series-parallel), dedicated Hybrid Transmissions (DHT), and the like, based on the power transmission route. In a hybrid vehicle, a hybrid coupling device may be used to transfer or couple power from an engine and an electric machine.
Currently, series-parallel hybrid systems are typically provided with two electric machines, one for engine speed modulation and one for torque modulation. A single mode series-parallel hybrid system is known having multiple clutches and fixed gear ratios, such as disclosed in US 5669842 a; a multi-mode series-parallel hybrid system is known having a plurality of planetary gear sets and clutches, such as disclosed in US 5558588A; other configurations of series-parallel hybrid systems are known having multiple electric machines and multiple planetary gear sets.
Some existing Dedicated Hybrid Systems (DHTs) use a single motor to achieve a tradeoff between system performance and cost. An electromechanical hybrid system is known from US 5433282a having a planetary gear set, an engine, an electric machine and a one-way clutch, however the system can only provide two modes of operation.
Series-parallel hybrid power systems have been popular in recent years due to high system efficiency, however, the arrangement of dual motors has resulted in increased system cost, increased integration difficulty and increased complexity of control systems. Dedicated Hybrid Systems (DHTs) using a single motor are advantageous in terms of cost reduction, however, only have limited modes of operation at the expense of system performance. The prior art solutions all have rather complex power coupling mechanisms, which increase the manufacturing and integration difficulties and are disadvantageous for commercialization.
Disclosure of Invention
The invention aims to at least partially overcome the defects in the prior art and provide a hybrid power coupling device with optimized number of parts and simple structure.
An electromechanical hybrid coupling device according to the present invention includes: a first planetary gear set having a first ring gear, a first carrier, and a first sun gear; a second planetary gear set having a second ring gear, a second planet carrier, and a second sun gear; a rotary clutch; a first brake clutch; a second brake clutch; an output shaft; a fixing member. The mechanical power source is connected to the first ring gear of the first planetary gear set, the rotor of the electric machine is connected to the second ring gear of the second planetary gear set, the first sun gear of the first planetary gear set is rigidly connected to the second carrier of the second planetary gear set, and the output shaft is rigidly connected to the first carrier of the first planetary gear set. The rotating clutch is positioned between the first ring gear of the first planetary gear set and the second sun gear of the second planetary gear set for controlling connection or disconnection between the first ring gear and the second sun gear. The first brake clutch is located between the second sun gear of the second planetary gear set and the stationary member for controlling the connection or disconnection between the second sun gear and the stationary member. The second brake clutch is located between the second carrier and the stationary member of the second planetary gear set for controlling the connection or disconnection between the second carrier and the stationary member.
In an alternative embodiment, in an electric-only operating mode in which the electric machine is only providing power, the mechanical power source is turned off, the second brake clutch is opened, and the first brake clutch and the rotating clutch are closed, such that power of the electric machine is transmitted to the output shaft via the second ring gear of the second planetary gear set, the second carrier, the first sun gear of the first planetary gear set, the first carrier.
In an alternative embodiment, in a purely mechanical operating mode, in which only the mechanical power source is providing power, the electric machine is deactivated, the first brake clutch is opened and the second brake clutch and the rotating clutch are closed, so that the power of the mechanical power source is transmitted to the output shaft output via the first ring gear and the first carrier of the first planetary gear set.
In an alternative embodiment, in a parallel hybrid operating mode, the first brake clutch is open and the second brake clutch and the rotating clutch are closed, power of the electric machine is transmitted to the first carrier through the second ring gear of the second planetary gear set, the second carrier, the second sun gear, the first ring gear of the first planetary gear set, power of the mechanical power source is transmitted to the first carrier through the first ring gear of the first planetary gear set, and the power is then transmitted from the first carrier to the output shaft.
In an alternative embodiment, in the electronic continuously variable hybrid operating mode I, the second brake clutch and the rotating clutch are opened, and the first brake clutch is closed, power of the motor is transmitted to the first carrier through the second ring gear of the second planetary gear set, the second carrier, the first sun gear of the first planetary gear set, power of the mechanical power source is transmitted to the first carrier through the first ring gear of the first planetary gear set, and the power is then transmitted from the first carrier to the output shaft.
In an alternative embodiment, in an electrically variable hybrid mode II, the first brake clutch and the second brake clutch are open, while the rotating clutch is closed, the power of the electric machine is transmitted to the first carrier via the second ring gear of the second planetary gear set, the second carrier, the first sun gear of the first planetary gear set, on the one hand, and to the first carrier via the second ring gear of the second planetary gear set, the second carrier, the second sun gear, the first ring gear of the first planetary gear set, and the power of the mechanical power source is transmitted to the first carrier via the first ring gear of the first planetary gear set, which power is then transmitted from the first carrier to the output shaft.
In an alternative embodiment, in the parking charging operation mode I, the rotating clutch and the second brake clutch are opened, the first brake clutch is closed, the parking brake is closed, and the power of the mechanical power source is transmitted to the motor through the first gear ring, the first planet carrier, the first sun gear, the second planet carrier and the second gear ring of the first planetary gear set to drive the motor to charge the battery.
In an alternative embodiment, in the parking charging operation mode II, the first brake clutch and the second brake clutch are opened, the rotary clutch is closed, the parking brake is closed, and the power of the mechanical power source is transmitted to the motor through the first gear ring of the first planetary gear set, the first planet carrier, the first sun gear, the second planet carrier of the second planetary gear set and the second gear ring on the one hand, and is transmitted to the motor through the first gear ring, the second sun gear, the second planet carrier and the second gear ring on the other hand, so as to drive the motor to charge the battery.
The object of the invention is also achieved by a hybrid drive system. The hybrid power driving system comprises a mechanical power source, a motor and the electromechanical hybrid power coupling device, wherein the electromechanical hybrid power coupling device is used for transmitting or coupling power of the mechanical power source and the motor, and an output shaft of the electromechanical hybrid power coupling device is connected with a downstream transmission system.
In an alternative embodiment, the mechanical power source is an engine. In an alternative embodiment, the mechanical power source is connected to the first ring gear through a damper. In an alternative embodiment, the electromechanical hybrid coupling device is integrated in a housing, the stationary component being the housing. In an alternative embodiment, the fixed component is a body of a vehicle. In an alternative embodiment, the electric machine can be operated as a motor or a generator. In an alternative embodiment, the electric machine has a stator and a rotor, the stator of the electric machine surrounding its rotor radially outside. In an alternative embodiment, the downstream drive train is a final drive and differential. In an alternative embodiment, the electromechanical hybrid coupling device is used as a transmission.
In an alternative embodiment, the electric machine is integrated in the housing of the electromechanical hybrid coupling device. In an alternative embodiment, the electric machine is integrated with the electromechanical hybrid coupling device in a different housing.
The object of the invention is also achieved by a hybrid vehicle. The hybrid vehicle includes the hybrid drive system according to the invention described above.
The hybrid power coupling device, the hybrid power driving system and the hybrid power vehicle have low cost and small integration difficulty, and can ensure the power performance and the system efficiency.
Drawings
The principles, features and advantages of the present invention may be better understood by referring to the drawings that follow. The drawings show:
fig. 1 shows a schematic diagram of a hybrid drive system according to an embodiment of the invention.
Fig. 2a shows the operating state and the power flow diagram of the hybrid drive system in the electric-only operating mode.
Fig. 2b shows the operating state and power flow diagram of the hybrid drive system in the engine-only operating mode.
Fig. 2c shows the operating state and power flow diagram of the hybrid drive system in the parallel hybrid operating mode.
Fig. 2d shows the operating state and power flow diagram of the hybrid drive system in e-CVT mode I of operation.
Fig. 2e shows the operating state and power flow diagram of the hybrid drive system in e-CVT mode II of operation.
Fig. 2f shows the operating state and the power flow diagram of the hybrid drive system in the parking charge operating mode I.
Fig. 2g shows the operating state and the power flow diagram of the hybrid drive system in the parking charge operating mode II.
Fig. 3 shows characteristic curves in various modes of operation in one embodiment.
Detailed Description
In order to make the technical problems, technical solutions and advantageous technical effects to be solved more apparent, the present invention will be further described in detail with reference to the accompanying drawings and various embodiments. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Fig. 1 shows a schematic diagram of a hybrid drive system according to an embodiment of the invention.
As shown in fig. 1, the hybrid drive system includes an engine 1, a motor 2, a first planetary gear set 3, a second planetary gear set 4, a rotating Clutch (CR) 5, a first brake clutch (CB 1) 7, a second brake clutch (CB 2) 6, and an output shaft 9, wherein the first planetary gear set 3 is mainly composed of a first ring gear, a first carrier, and a first sun gear, the second planetary gear set 4 is mainly composed of a second ring gear, a second carrier, and a second sun gear, the motor 2 includes a stator and a rotor, and the motor 2 can operate as a motor or a generator as necessary. Preferably, the hybrid drive system further comprises a torsional vibration damper 8, the torsional vibration damper 8 being arranged between the engine 1 and the first ring gear of the first planetary gear set 3.
In the embodiment of fig. 1, the engine 1 is connected to the first ring gear of the first planetary gear set 3 via a torsional vibration damper 8. The first ring gear of the first planetary gear set 3 can also be connected to the second sun gear of the second planetary gear set 4 via a rotating clutch 5. The second sun gear of the second planetary gear set 4 can be braked by the first brake clutch 7. The electric machine 2 is directly connected to the second ring gear of the second planetary gear set 4. The first sun gear of the first planetary gear set 3 is rigidly connected to the second carrier of the second planetary gear set 4 and they can be braked by the second brake clutch 6. The carrier of the first planetary gear set 3 is transmitted as an output shaft 9 via a downstream drive train, such as a final drive and a differential, to the driving wheels for driving the vehicle.
In the hybrid drive system, the first planetary gear set 3, the second planetary gear set 4, the rotating Clutch (CR) 5, the first brake clutch (CB 1) 7, the second brake clutch (CB 2) 6, and the output shaft 9 constitute a hybrid coupling device for transmitting or coupling power of the engine 1 and the motor 2.
It is noted that the engine 1 is only one example of a mechanical power source, and that any other suitable mechanical power means may obviously be used. Furthermore, the electric machine 2 is preferably directly connected to the second ring gear by its rotor, the stator preferably surrounding the rotor radially outside, thereby making the structure more compact.
In the illustrated embodiment, the hybrid drive system may implement a variety of operating modes, namely, an electric-only operating mode, an engine-only operating mode, a parallel hybrid operating mode, an e-CVT (electronic continuously variable transmission) hybrid operating mode, and a park-charge mode. Specifically, five modes of operation can be achieved through various combinations of operation of respective clutch engagement or disengagement, motor operating conditions, parking brake clamping or release, and the like, as shown in fig. 2a to 2 g. The various operating modes are listed in table 1, wherein diamond-solid and o represent engaged and released states, respectively.
Table 1 operating modes and component states of hybrid drive systems
Figure SMS_1
Next, each specific operation mode will be described in detail.
(A) Pure electric operation mode
In this operating mode, as shown in fig. 2a, the rotary clutch 5 is closed and the first brake clutch 7 is closed, the first planetary gear set 3 and the second planetary gear set 4 acting together as a fixed ratio transmission. At this time, the engine 1 is stopped, and the vehicle is driven only by the motor 2 at the fixed gear ratio. The driving torque in this mode is large enough to ensure rapid acceleration from the stopped state. As shown in fig. 2a, the engine 1 is shut down, the rotating clutch 5 is closed and the first brake clutch 7 is closed, and the second brake clutch 6 is opened, and the electric machine 2 operates as a motor, the power of which is transmitted from the rotor to the second carrier through the second ring gear of the second planetary gear set 4 and then sequentially output through the first sun gear of the first planetary gear set 3, the first carrier and the output shaft 9. In this operating mode, the electric machine 2 can also be operated as a generator in order to recover braking energy during forward braking.
(B) Pure engine operation mode
In this operating mode, as shown in fig. 2b, the rotary clutch 5 is closed and the second brake clutch 6 is closed, the first planetary gear set 3 functioning as a fixed ratio transmission. At this time, the motor 2 is in an idling state, and the vehicle is driven only by the engine 1. As shown in fig. 2b, the engine 1 is started, the rotating clutch 5 is closed and the second brake clutch 6 is closed, and the first brake clutch 7 is opened, and the power of the engine 1 is transmitted to the output shaft 9 via the first ring gear, the first carrier of the first planetary gear set 3 for output. In this operating mode, the electric machine 2 can also be operated as a generator in order to recover braking energy during forward braking.
(C) Parallel hybrid operating mode
As shown in fig. 2c, in this operating mode, the rotating clutch 5 is closed and the second brake clutch 6 is closed, the first planetary gear set 3 functions as in mode (B), the hybrid vehicle is jointly driven by the engine 1 and the electric machine 2, and maximum driving power can be provided for the vehicle to travel when the electric machine 2 is operated as a motor; the electric machine 2 may also be operated as a generator to take advantage of the excess power of the engine 1 when the power demand of the vehicle is below the engine high power region.
As shown in fig. 2c, the rotating clutch 5 is closed and the second brake clutch 6 is closed, and the first brake clutch 7 is opened, the power of the engine 1 is transmitted to the first carrier via the first ring gear of the first planetary gear set 3, the power of the motor 2 is transmitted to the second carrier via the second ring gear of the second planetary gear set 4, the second sun gear is transmitted to the first ring gear of the first planetary gear set 3 and the first carrier when the motor operates as an engine, and then the power flows of the engine 1 and the motor 2 are output from the first carrier of the first planetary gear set 3 through the output shaft 9. Furthermore, similar to the case of the operation mode (B), the electric machine 2 can also be operated as a generator in order to recover braking energy during forward braking.
(D) E-CVT hybrid operating mode
Specifically, two different types of e-CVT hybrid operating modes are included: an e-CVT hybrid mode of operation I and an e-CVT hybrid mode of operation II.
E-CVT hybrid operating mode I
In this operating mode, as shown in fig. 2d, the first brake clutch 7 is closed, the rotating clutch 5 is open and the second brake clutch 6 is open, the first planetary gear set 3 acts as an electronic continuously variable transmission (EVT), and the second planetary gear set 4 acts as a fixed ratio transmission. Depending on the speed requirements of the engine 1, the electric machine 2 may be operated as a motor or as a generator in order to bring the engine 1 into regulation in its efficient area.
E-CVT hybrid operating mode II
In this operating mode, as shown in fig. 2e, the rotating clutch 5 is closed, while the first brake clutch 7 is open and the second brake clutch 6 is open, the first planetary gear set 3 and the second planetary gear set 4 together functioning as an electronic continuously variable transmission (EVT). Similar to the e-CVT hybrid operating mode I described above, the engine 1 speed can thus be continuously modulated, and the engine operating conditions can be optimized. If the rotational speeds of the engine and the motor are synchronized, there is no gear mesh and no noise. Thereby improved efficiency and noise can be obtained.
These two e-CVT hybrid operating modes are particularly advantageous during high speed travel.
(E) Parking charging mode
The vehicle parking charging system specifically comprises two different types of parking charging modes: parking charging mode I and parking charging mode II.
Parking charging mode I
In this operating mode, as shown in fig. 2f, both the first brake clutch 7 and the parking brake are closed, while both the rotary brake 5 and the second brake clutch 6 are open, the first planetary gear set 3 acts as a fixed ratio transmission with the parking brake closed, and the second planetary gear set 4 acts as a fixed ratio transmission with the first brake clutch 7 closed. As shown in fig. 2f, the power of the engine 1 is sequentially transmitted to the second planet carrier of the second planetary gear set 4, the second gear ring and then to the rotor of the motor 2 through the first gear ring, the first planet carrier and the first sun gear of the first planetary gear set 3, and the motor 2 operates as a generator, and the engine 1 drives the motor 2 to charge a battery.
Parking charging mode II
In this operating mode, as shown in fig. 2g, both the rotary clutch 5 and the parking brake are closed, and both the first brake clutch 7 and the second brake clutch 6 are open, the first planetary gear set 3 and the second planetary gear set 4 together functioning as a fixed ratio transmission. Similar to the e-CVT hybrid mode II of operation, the power flow of the engine 1 is transmitted to the battery through the electric machine 2.
Furthermore, the vehicle can meet the reverse gear only when the electric machine 2 is operated as an electric motor by means of the hybrid coupling device according to the invention.
It can be seen that the hybrid drive system of the present invention is relatively simple, employing two planetary gear sets, a single electric machine, two brake clutches, and one rotating clutch. By a combination of different operations of these components, a plurality of different modes of operation are achieved and are suitable for different driving conditions. Fig. 3 illustrates characteristic curves in various operating modes, which are derived from parameters and requirements of a target Sport Utility Vehicle (SUV) on the market, wherein the abscissa represents vehicle speed (km/h) and the ordinate represents wheel torque (Nm). Curve 30 is a vehicle speed resistance curve, and curve 31 is a 30% gradient curve. Curve 32 shows the case of an electric-only operating mode, in which it can be seen that good acceleration performance can be achieved by means of the electric machine 2, in which case the electric-only operating mode can reach 50km/h at 30% gradient resistance, which is preferred when the battery has a sufficient charge. Curve 33 illustrates the case of an engine-only operating mode, which is particularly advantageous at low battery state of charge (SOC) at moderate vehicle speeds and torque demands as shown. Curve 34 shows the case of a parallel hybrid operating mode, where a more aggressive drive is achieved by combining the power of the engine and the motor, part of the power of the engine being available to charge the battery when the driving load is low, so as to ensure that the battery state of charge (SOC) is at an appropriate level. Curve 35 shows the e-CVT hybrid operating mode I and curve 36 shows the e-CVT hybrid operating mode II, which can cover the entire travel speed range, and is particularly suitable for high speed travel. Both e-CVTs can achieve a maximum vehicle speed of 200 km/h.
The hybrid drive system of the present invention has lower cost and system complexity without sacrificing power performance and economic performance. It will be apparent to those skilled in the art that the hybrid drive system of the present invention is also applicable to other suitable applications, and is not limited to hybrid vehicles.
Other advantages and alternative embodiments of the invention will be apparent to those of ordinary skill in the art. Therefore, the invention in its broader aspects is not limited to the specific details, the representative structures, and illustrative examples shown and described. Rather, various modifications and substitutions may be made by those skilled in the art without departing from the basic spirit and scope of the invention.

Claims (17)

1. An electromechanical hybrid coupling device, comprising:
a first planetary gear set (3) having a first ring gear, a first carrier and a first sun gear,
a second planetary gear set (4) having a second ring gear, a second carrier and a second sun gear,
a rotary clutch (5),
a first brake clutch (7),
a second brake clutch (6),
an output shaft (9),
the fixing part is arranged on the upper surface of the fixing part,
wherein the mechanical power source is connected to a first ring gear of the first planetary gear set (3), the rotor of the electric machine (2) is connected to a second ring gear of the second planetary gear set (4), the first sun gear of the first planetary gear set (3) is rigidly connected to a second carrier of the second planetary gear set (4), the output shaft (9) is rigidly connected to the first carrier of the first planetary gear set (3),
the rotary clutch (5) is arranged between the first gear ring of the first planetary gear set (3) and the second sun gear of the second planetary gear set (4) and is used for controlling the connection or disconnection between the first gear ring and the second sun gear,
the first brake clutch (7) is arranged between the second sun gear of the second planetary gear set (4) and the fixed part and is used for controlling the connection or disconnection between the second sun gear and the fixed part,
the second brake clutch (6) is located between the second planet carrier of the second planetary gear set (4) and the stationary member for controlling the connection or disconnection between the second planet carrier and the stationary member.
2. The electromechanical hybrid coupling device according to claim 1, wherein:
in an electric-only operating mode, in which only the electric machine (2) is powered, the mechanical power source is shut down, the second brake clutch (6) is open, and the first brake clutch (7) and the rotary clutch (5) are closed, so that the power of the electric machine (2) is transmitted to the output shaft (9) via the second ring gear of the second planetary gear set (4), the second carrier, the first sun gear of the first planetary gear set (3), the first carrier.
3. The electromechanical hybrid coupling device according to claim 1 or 2, characterized in that:
in a purely mechanical operating mode, in which only the mechanical power source is powered, the electric machine (2) is deactivated, the first brake clutch (7) is opened, and the second brake clutch (6) and the rotating clutch (5) are closed, so that the power of the mechanical power source is transmitted to the output shaft (9) via the first ring gear and the first planet carrier of the first planetary gear set (3).
4. The electromechanical hybrid coupling device according to claim 1 or 2, characterized in that:
in a parallel hybrid operating mode, the first brake clutch (7) is opened, the second brake clutch (6) and the rotary clutch (5) are closed, power of the motor (2) is transmitted to the first planet carrier through the second ring gear of the second planetary gear set (4), the second planet carrier, the second sun gear and the first ring gear of the first planetary gear set (3), power of the mechanical power source is transmitted to the first planet carrier through the first ring gear of the first planetary gear set (3), and the power is then transmitted to the output shaft (9) from the first planet carrier.
5. An electromechanical hybrid coupling device as claimed in claim 3, wherein:
in a parallel hybrid operating mode, the first brake clutch (7) is opened, the second brake clutch (6) and the rotary clutch (5) are closed, power of the motor (2) is transmitted to the first planet carrier through the second ring gear of the second planetary gear set (4), the second planet carrier, the second sun gear and the first ring gear of the first planetary gear set (3), power of the mechanical power source is transmitted to the first planet carrier through the first ring gear of the first planetary gear set (3), and the power is then transmitted to the output shaft (9) from the first planet carrier.
6. The electromechanical hybrid coupling device according to any one of claims 1, 2 and 5, characterized in that:
in an electronic continuously variable hybrid operating mode I, the second brake clutch (6) and the rotary clutch (5) are opened, the first brake clutch (7) is closed, the power of the motor (2) is transmitted to the first planet carrier through the second gear ring of the second planetary gear set (4), the second planet carrier and the first sun gear of the first planetary gear set (3), the power of the mechanical power source is transmitted to the first planet carrier through the first gear ring of the first planetary gear set (3), and then the power is transmitted to the output shaft (9) from the first planet carrier; and/or
In an electronic continuously variable hybrid operating mode II, the first brake clutch (7) and the second brake clutch (6) are open, the rotary clutch (5) is closed, the power of the motor (2) is transmitted to the first planet carrier through the second ring gear of the second planetary gear set (4), the second planet carrier and the first sun gear of the first planetary gear set (3), the power is transmitted to the first planet carrier through the second ring gear of the second planetary gear set (4), the second planet carrier and the second sun gear and the first ring gear of the first planetary gear set (3), the power of the mechanical power source is transmitted to the first planet carrier through the first ring gear of the first planetary gear set (3), and the power is transmitted to the output shaft (9) from the first planet carrier.
7. An electromechanical hybrid coupling device as claimed in claim 3, wherein:
in an electronic continuously variable hybrid operating mode I, the second brake clutch (6) and the rotary clutch (5) are opened, the first brake clutch (7) is closed, the power of the motor (2) is transmitted to the first planet carrier through the second gear ring of the second planetary gear set (4), the second planet carrier and the first sun gear of the first planetary gear set (3), the power of the mechanical power source is transmitted to the first planet carrier through the first gear ring of the first planetary gear set (3), and then the power is transmitted to the output shaft (9) from the first planet carrier; and/or
In an electronic continuously variable hybrid operating mode II, the first brake clutch (7) and the second brake clutch (6) are open, the rotary clutch (5) is closed, the power of the motor (2) is transmitted to the first planet carrier through the second ring gear of the second planetary gear set (4), the second planet carrier and the first sun gear of the first planetary gear set (3), the power is transmitted to the first planet carrier through the second ring gear of the second planetary gear set (4), the second planet carrier and the second sun gear and the first ring gear of the first planetary gear set (3), the power of the mechanical power source is transmitted to the first planet carrier through the first ring gear of the first planetary gear set (3), and the power is transmitted to the output shaft (9) from the first planet carrier.
8. The electromechanical hybrid coupling device according to claim 4, wherein:
in an electronic continuously variable hybrid operating mode I, the second brake clutch (6) and the rotary clutch (5) are opened, the first brake clutch (7) is closed, the power of the motor (2) is transmitted to the first planet carrier through the second gear ring of the second planetary gear set (4), the second planet carrier and the first sun gear of the first planetary gear set (3), the power of the mechanical power source is transmitted to the first planet carrier through the first gear ring of the first planetary gear set (3), and then the power is transmitted to the output shaft (9) from the first planet carrier; and/or
In an electronic continuously variable hybrid operating mode II, the first brake clutch (7) and the second brake clutch (6) are open, the rotary clutch (5) is closed, the power of the motor (2) is transmitted to the first planet carrier through the second ring gear of the second planetary gear set (4), the second planet carrier and the first sun gear of the first planetary gear set (3), the power is transmitted to the first planet carrier through the second ring gear of the second planetary gear set (4), the second planet carrier and the second sun gear and the first ring gear of the first planetary gear set (3), the power of the mechanical power source is transmitted to the first planet carrier through the first ring gear of the first planetary gear set (3), and the power is transmitted to the output shaft (9) from the first planet carrier.
9. The electromechanical hybrid coupling device according to any one of claims 1, 2, 5, 7, 8, wherein:
in a parking charging operation mode I, the rotary clutch (5) and the second brake clutch (6) are opened, the first brake clutch (7) is closed, the parking brake is closed, and the power of the mechanical power source is transmitted to the motor (2) through the first gear ring, the first planet carrier, the first sun gear and the second planet carrier of the second planetary gear set (4) of the first planetary gear set (3) to drive the motor (2) to charge a battery; and/or
In the parking charging operation mode II, the first braking clutch (7) and the second braking clutch (6) are opened, the rotating clutch (5) is closed, the parking brake is closed, and the power of the mechanical power source is transmitted to the motor (2) through the first gear ring, the first planet carrier, the first sun gear and the second planet carrier and the second gear ring of the first planetary gear set (3) on one hand, and is transmitted to the motor (2) through the first gear ring, the second sun gear, the second planet carrier and the second gear ring on the other hand, so that the motor (2) is driven to charge a battery.
10. An electromechanical hybrid coupling device as claimed in claim 3, wherein:
in a parking charging operation mode I, the rotary clutch (5) and the second brake clutch (6) are opened, the first brake clutch (7) is closed, the parking brake is closed, and the power of the mechanical power source is transmitted to the motor (2) through the first gear ring, the first planet carrier, the first sun gear and the second planet carrier of the second planetary gear set (4) of the first planetary gear set (3) to drive the motor (2) to charge a battery; and/or
In the parking charging operation mode II, the first braking clutch (7) and the second braking clutch (6) are opened, the rotating clutch (5) is closed, the parking brake is closed, and the power of the mechanical power source is transmitted to the motor (2) through the first gear ring, the first planet carrier, the first sun gear and the second planet carrier and the second gear ring of the first planetary gear set (3) on one hand, and is transmitted to the motor (2) through the first gear ring, the second sun gear, the second planet carrier and the second gear ring on the other hand, so that the motor (2) is driven to charge a battery.
11. The electromechanical hybrid coupling device according to claim 4, wherein:
in a parking charging operation mode I, the rotary clutch (5) and the second brake clutch (6) are opened, the first brake clutch (7) is closed, the parking brake is closed, and the power of the mechanical power source is transmitted to the motor (2) through the first gear ring, the first planet carrier, the first sun gear and the second planet carrier of the second planetary gear set (4) of the first planetary gear set (3) to drive the motor (2) to charge a battery; and-or (b)
In the parking charging operation mode II, the first braking clutch (7) and the second braking clutch (6) are opened, the rotating clutch (5) is closed, the parking brake is closed, and the power of the mechanical power source is transmitted to the motor (2) through the first gear ring, the first planet carrier, the first sun gear and the second planet carrier and the second gear ring of the first planetary gear set (3) on one hand, and is transmitted to the motor (2) through the first gear ring, the second sun gear, the second planet carrier and the second gear ring on the other hand, so that the motor (2) is driven to charge a battery.
12. The electromechanical hybrid coupling device according to claim 6, wherein:
in a parking charging operation mode I, the rotary clutch (5) and the second brake clutch (6) are opened, the first brake clutch (7) is closed, the parking brake is closed, and the power of the mechanical power source is transmitted to the motor (2) through the first gear ring, the first planet carrier, the first sun gear and the second planet carrier of the second planetary gear set (4) of the first planetary gear set (3) to drive the motor (2) to charge a battery; and/or
In the parking charging operation mode II, the first braking clutch (7) and the second braking clutch (6) are opened, the rotating clutch (5) is closed, the parking brake is closed, and the power of the mechanical power source is transmitted to the motor (2) through the first gear ring, the first planet carrier, the first sun gear and the second planet carrier and the second gear ring of the first planetary gear set (3) on one hand, and is transmitted to the motor (2) through the first gear ring, the second sun gear, the second planet carrier and the second gear ring on the other hand, so that the motor (2) is driven to charge a battery.
13. Hybrid drive system, wherein the hybrid drive system comprises a mechanical power source, an electric machine (2) and an electromechanical hybrid coupling device according to any of claims 1 to 12 for transmitting or coupling the power of the mechanical power source (1) and the electric machine (2), the output shaft (9) of the electromechanical hybrid coupling device being connected with a downstream driveline.
14. The hybrid drive system according to claim 13, wherein:
the mechanical power source is an engine (1); and/or
The mechanical power source is connected to the first gear ring through a damper (8); and/or
The electromechanical hybrid coupling device is integrated in a housing, the stationary component being the housing; and/or
The electric machine (2) can be operated as a motor or a generator; and/or
The electric machine (2) has a stator and a rotor, the stator of the electric machine (2) surrounding its rotor radially outside; and/or
The downstream drive train is a final drive and differential; and/or
The electromechanical hybrid coupling device is used as a transmission.
15. The hybrid drive system according to claim 14, wherein:
the electric machine (2) is integrated in the housing of the electromechanical hybrid coupling device; or (b)
The electric machine (2) and the electromechanical hybrid coupling are integrated in different housings.
16. The hybrid drive system according to claim 13, wherein: the fixing member is a vehicle body.
17. A hybrid vehicle comprising the hybrid drive system according to any one of claims 13 to 16.
CN201710388247.9A 2017-05-27 2017-05-27 Hybrid coupling device, hybrid drive system, and hybrid vehicle Active CN108944410B (en)

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