CN108909431B - Single-motor hybrid power driving system of vehicle and control method - Google Patents
Single-motor hybrid power driving system of vehicle and control method Download PDFInfo
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- CN108909431B CN108909431B CN201810660645.6A CN201810660645A CN108909431B CN 108909431 B CN108909431 B CN 108909431B CN 201810660645 A CN201810660645 A CN 201810660645A CN 108909431 B CN108909431 B CN 108909431B
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Classifications
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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
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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
- B60K6/24—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
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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
- B60K6/26—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
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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
- B60K6/38—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
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- 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 provides a single-motor hybrid power driving system and a control method of a vehicle, and belongs to the technical field of automobiles. The hybrid power driving system solves the problems of good power performance and energy saving effect when the hybrid power driving system has a simple structure and low cost. The driving system comprises an engine, a locking mechanism, a motor, a clutch, a gearbox, a sun gear, a planetary gear and a planetary gear ring, wherein the sun gear, the planetary gear and the planetary gear ring are coaxially arranged, the planetary gear is positioned between the sun gear and the planetary gear ring and respectively meshed with the sun gear and the planetary gear ring, a rotor of the motor is coaxial with a wheel shaft of the sun gear and is fixedly connected with the wheel shaft of the sun gear, a planet carrier is fixed on the wheel shaft of the planetary gear, and the planet carrier is connected with or separated from the wheel shaft of the sun gear through the clutch; an output shaft of the engine is fixedly connected with a planetary gear ring, and a planet carrier is fixedly connected with an input shaft of the gearbox. The system has simple structure and lower cost, has multiple working modes, and can select the optimal working mode according to different vehicle conditions, so that the vehicle has better power performance and energy-saving effect.
Description
Technical Field
The invention belongs to the technical field of automobiles, and relates to a single-motor hybrid power driving system of a vehicle and a control method.
Background
With the rapid development of the current economy, the problems of environmental pollution and energy conservation and environmental protection are more and more widely focused by people, the government also increases the introduction and research on the field of new energy, the traditional automobile faces the problems of low transmission efficiency, environmental pollution caused by exhaust gas and the like, the requirements cannot be met more and more, but the development of the pure electric automobile is limited at the present stage, mainly the development bottleneck of the new technology of the battery, and the requirements of long-distance driving mileage of the automobile are difficult to meet, so the hybrid power is the best two choices at the present stage. According to different power sources in a hybrid power system, hybrid power driving devices are mainly divided into two types: a hybrid power driving device with a double motor scheme and a hybrid power driving device with a single motor scheme.
The hybrid power driving device of the double-motor scheme, such as the one disclosed in China patent [ application No. 201510553133. X ], adopts a double planetary gear train as a power coupling element to realize the split transmission of the output power of the loader. The engine input shaft is connected with the rotating part of the first locker and is meshed with a second gear coaxially and fixedly connected with the front row planetary gear train gear ring through a first gear, one end of a second motor rotor is connected with the sun gear, the other end of the second motor rotor is connected with the rotating part of the second locker, the rear row gear ring is connected with a first motor rotor, and a planet carrier of the planetary gear train is connected with the output shaft. According to the running condition of the whole machine and the charge state of the power battery, the loader can be controlled to flexibly switch between 5 working modes such as an engine starting mode, a pure electric driving mode, an engine independent driving mode, a power splitting mode, a regenerative braking mode and the like through the joint control of the first locker and the second locker, so that the efficiency of a transmission system of the loader is improved, and the fuel economy of the loader is effectively improved.
A hybrid drive device of a single motor scheme is disclosed in chinese patent [ application No. 201720784065.9 ], and includes: the speed reducing mechanism, differential mechanism, casing, set up motor, center pin in the casing, set gradually in epaxial second stopper, compound planetary gear mechanism, first stopper, second clutch, third clutch and first clutch of center pin, with compound planetary gear mechanism continuous first connecting axle, second connecting axle and third connecting axle, wherein: the stator of the motor is fixedly connected with the shell, and the rotor is connected with the compound planetary gear set mechanism through a first connecting shaft; the compound planetary gear set mechanism, the second connecting shaft, the speed reducing mechanism and the differential mechanism are connected in sequence; the first clutch is positioned between the central shaft and the first connecting shaft, the second clutch is positioned between the central shaft and the compound planetary gear set mechanism, and the third clutch is positioned between the compound planetary gear set mechanism and the first connecting shaft; the first brake and the second brake are fixedly connected with the shell and are respectively connected with the first connecting shaft and the third connecting shaft; the system is a constant-speed power superposition system, and takes an engine as main power and a motor as auxiliary power.
In the prior art, the engine in the hybrid power driving device of the double-motor scheme has high working efficiency, relatively good power performance and energy-saving effect of the whole vehicle, but has complex structure, high cost and few working modes. The single-motor scheme does not need to greatly change the traditional vehicle, but has a gap between the power performance and the energy-saving effect of the whole vehicle compared with the double-motor scheme because the single-motor scheme does not have a power splitting function. Therefore, a single-motor scheme hybrid power driving device with simple structure, low cost, better power performance and energy-saving effect and multiple working modes is urgently needed in the market.
Disclosure of Invention
The invention aims at solving the problems in the prior art, and provides a single-motor hybrid power driving system and a control method of a vehicle.
In one aspect, the object of the present invention can be achieved by the following technical solutions: the single-motor hybrid power driving system of the vehicle comprises an engine, a locking mechanism for locking the engine, a motor, a clutch and a gearbox, and is characterized by further comprising a sun gear, a planetary gear and a planetary gear ring which are coaxially arranged, wherein the planetary gear is positioned between the sun gear and the planetary gear ring and is respectively meshed with the sun gear and the planetary gear ring, a rotor of the motor is coaxially and fixedly connected with a wheel shaft of the sun gear, a planet carrier is fixed on the wheel shaft of the planetary gear, and the planet carrier is connected with or separated from the wheel shaft of the sun gear through the clutch; the output shaft of the engine is fixedly connected with the planetary gear ring, and the planet carrier is fixedly connected with the input shaft of the gearbox.
The single-motor hybrid power driving system well connects the engine, the motor and the gearbox by designing a set of planetary gear mechanism, can ensure that the energy recovery is performed to the greatest extent while the structure is simple and the cost is low, saves energy and reduces oil consumption; specifically, in the working process of starting and normal running of the vehicle, the locking mechanism is released, the engine is in a working state, the clutch is separated, the gearbox is in a gear state, at the moment, the engine drives the gear ring, the motor drives the sun gear, the planet carrier is used as power input of the gearbox, at the moment, the speed of the vehicle is regulated through power generation and driving of the motor, the engine can be always in a high-efficiency working area, the power of the whole vehicle is strongest, and the energy consumption is lowest; that is, when the gearbox needs low speed and low torque, the motor can generate electricity to balance the torque and the rotation speed of the input shaft of the gearbox, so that the energy is recovered to the maximum extent and the energy is saved; when the gearbox needs high speed and high torque, the motor can drive the whole car together with the engine, so that the power performance is optimal; therefore, in the working process, a good energy-saving effect can be achieved by carrying out power splitting, and the power splitting of a transmission system is realized by a single motor, so that compared with a power splitting system with double motors, the power splitting system has simpler structure and lower cost; meanwhile, as the power can be split, the gear of the gearbox connected at the back can be not too much, the size can be reduced as much as possible, and the arrangement of the whole vehicle is facilitated; in addition, when the clutch is in a combined state, the engine and the motor can drive the vehicle at the same time during running of the vehicle, so that the power of the vehicle is sufficient; when the vehicle brakes, the motor can generate electricity in a reverse dragging way, so that energy is recycled, and energy sources are saved.
On the other hand, the aim of the invention can be achieved by the following technical scheme: the control method of the single-motor hybrid power driving system of the vehicle is characterized in that the whole vehicle ECU can control the driving system to realize the following working modes: a pure electric mode, a starting mode, an idle power generation mode, an engine start mode, a power split mode, an energy recovery mode, a reverse mode, and a hybrid mode;
when the engine does not work and the motor works independently, the whole vehicle ECU controls the driving system to be in a pure electric mode;
when the vehicle is stationary and the engine needs to be started, the whole vehicle ECU controls the driving system to be in a starting working mode;
when the vehicle is stationary, the engine is in an idle state, the gearbox is in a neutral position, and the whole vehicle is braked; or when the vehicle runs to a red light intersection, the gearbox is on a gear, and the whole vehicle is braked; the whole vehicle ECU controls the driving system to be in an idle power generation working mode;
when the vehicle encounters traffic jam, the running is slow, the battery SOC value is low, and the vehicle cannot start with a motor; the whole vehicle ECU controls the driving system to be in an engine starting working mode;
when the vehicle starts and normally runs, the engine works, the gearbox is in a gear state, the clutch is in a separation state, and the whole vehicle ECU controls the driving system to be in a power split working mode;
when the vehicle needs to be decelerated and braked, the whole vehicle ECU controls the driving system to be in an energy recovery working mode;
when the vehicle gear shifting handle is in a reverse gear position, the whole vehicle ECU controls the driving system to be in a reverse gear working mode;
when the clutch is in a combined state, the engine and the motor are connected together, and the whole vehicle ECU controls the driving system to be in a hybrid power working mode.
The driving system has various working modes, and the whole vehicle ECU can be aimed at different vehicle working conditions, so that the driving system can be in a corresponding working mode, and the driving system can be always in a state with good power performance and high energy saving efficiency according to different vehicle conditions.
In the control method of the single-motor hybrid power drive system of the vehicle, in the pure electric mode, the clutch is in a disengaged state, the engine is locked by the locking mechanism, the motor drives the sun gear to rotate, the planetary gear ring is stationary, and the carrier outputs power to the input shaft of the transmission. At the moment, the planetary gear mechanism plays a role in reducing speed and increasing torque, the speed of the vehicle can be regulated by utilizing the rotating speed of the motor, the higher the rotating speed of the motor is, the faster the vehicle speed is, when the rotating speed of the motor is high to a certain extent with the vehicle speed, the rear gearbox starts to shift gears, so that the vehicle speed is higher, and the motor works in a high-efficiency working area, thereby ensuring the power performance of a driving system; meanwhile, the motor can be controlled to reversely drag to generate electricity for energy recovery during braking, so that energy conservation is facilitated, and the energy-saving effect of the driving system is improved.
In the above control method of the vehicle single motor hybrid drive system, in the start operation mode, there are three methods of starting the engine, the first method: the locking mechanism is released, the brake is stepped on, the gearbox is arranged on a gear, the clutch is separated, and the motor reversely drags the engine to start; the second method is as follows: the locking mechanism is released, the gearbox is not positioned on a gear, the clutch is combined, and the motor drives the engine to start; the third method is as follows: and the locking mechanism is released, the gearbox is not positioned at a gear, the motor rotates firstly, and the engine is started through sliding friction of the clutch. The engine is driven to start by the motors, so that energy required by the self-starting of the engine is saved, and the energy-saving effect of the driving system is improved.
In the control method of the single-motor hybrid power drive system of the vehicle, in the idle power generation operation mode, the clutch is in a combined state at this time, and the engine can carry the motor to generate power. When the working condition is mainly to deal with low battery SOC value or electric quantity storage, the charging blind area can be effectively avoided, the energy of the engine is fully utilized, and the energy saving effect of the system is improved.
In the control method of the single-motor hybrid power driving system of the vehicle, in the engine starting working mode, the clutch is in a separation state, and the engine output shaft drives the planetary gear ring to output power to the transmission input shaft. Through the mode, a starting clutch is not needed, the heating value of the gearbox is reduced, the working efficiency of the gearbox and the engine is improved, and starting is smooth.
In the control method of the single-motor hybrid power driving system of the vehicle, in the power split operation mode, when the gearbox needs low speed and low torque, the motor can generate electricity to balance the torque and the rotation speed of the input shaft of the gearbox; when the gearbox needs high speed and high torsion, the motor can drive the whole car together with the engine. The power splitting mode can achieve good energy-saving effect, and the single-motor power splitting mode has good cost advantage, so that the effect of the clutch is weakened, and the development difficulty is reduced.
In the control method of the single-motor hybrid power driving system of the vehicle, in the energy recovery working mode, ABS is firstly not activated, and vehicle braking deceleration is performed by reverse dragging power generation of the motor. The motor reversely drags to generate electricity means that the motor does not work at the moment, the gearbox input shaft drives the planet carrier, the planet carrier drives the sun wheel, the sun wheel drives the motor rotor to rotate, that is to say, at the moment, the rotor rotates to generate electricity under the drive of the gearbox input shaft, and the purpose of braking and speed reduction is achieved by utilizing the resistance of the rotor, namely, the motor reversely drags to generate electricity.
In the control method of the single-motor hybrid power driving system of the vehicle, in the reverse gear working mode, the clutch is in a separated state, the engine does not work, the locking mechanism locks the engine, and the motor reversely rotates to drive the input shaft of the gearbox to rotate. Through the design, the gearbox can be simplified, a reverse gear mechanism is canceled, the cost is saved, and the implementation is easy.
In the control method of the single-motor hybrid power driving system of the vehicle, in the hybrid power working mode, when the gearbox is not in a gear, the engine driving motor can directly generate power; during running of the vehicle, the engine and the motor can drive the vehicle at the same time; when the vehicle is braked, the motor reversely drags the brake to generate electricity. Through the mode, the power performance and the energy-saving effect of the driving system can be at a good level.
In yet another aspect, the object of the present invention can be achieved by the following technical solutions: the single-motor hybrid power driving system of the vehicle comprises an engine, a locking mechanism for locking the engine, a motor, a clutch and a gearbox, and is characterized by further comprising a sun gear, a planetary gear and a planetary gear ring which are coaxially arranged, wherein the planetary gear is positioned between the sun gear and the planetary gear ring and is respectively meshed with the sun gear and the planetary gear ring, a rotor of the motor is coaxially and fixedly connected with a wheel shaft of the sun gear, a planet carrier is fixed on the wheel shaft of the planetary gear, and the planet carrier is connected with or separated from the wheel shaft of the sun gear through the clutch; the output shaft of the engine is fixedly connected with the planet carrier, and the planet gear ring is fixedly connected with the input shaft of the gearbox. The scheme is that an engine is connected with a planet carrier, a motor is connected with a sun gear, a planetary gear ring is connected with a gearbox input shaft, the number of parts is basically the same as that of the first scheme, but the connection mode is different, the working mode is the same as that of the first scheme, and compared with the first scheme, the power split torque and the rotation speed are different, but the purposes of enabling the hybrid power driving system to be simple in structure, low in cost, good in power performance and energy-saving effect can be achieved.
Compared with the prior art, the single-motor hybrid power driving system and the control method of the vehicle have the following advantages: the single-motor hybrid power driving system well connects the engine, the motor and the gearbox by designing a set of planetary gear mechanism, can ensure that the energy recovery is performed to the greatest extent while the structure is simple and the cost is low, saves energy, reduces oil consumption, has various working modes, can select the optimal working mode according to different vehicle conditions, and ensures that the vehicle has better power performance and energy-saving effect.
Drawings
Fig. 1 is a schematic diagram of the structure of the first embodiment.
Fig. 2 is a schematic diagram of the structure of the second embodiment.
Fig. 3 is a schematic diagram of the structure of the third embodiment.
In the figure, 1, an engine; 1a, an output shaft; 2. a locking mechanism; 3. a motor; 31. a rotor; 32. a stator; 33. a housing; 4. a clutch; 5. a gearbox; 51. an input shaft; 6. a sun gear; 7. a planetary gear; 8. a planetary gear ring; 9. a planet carrier; 10. a dual mass flywheel.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Embodiment one:
specifically, as shown in fig. 1, the single-motor hybrid power driving system of the vehicle comprises an engine 1, a locking mechanism 2 for locking the engine 1, a motor 3, a clutch 4 and a gearbox 5, and further comprises a sun gear 6, a planetary gear 7 and a planetary gear ring 8 which are coaxially arranged, wherein the planetary gear 7 is positioned between the sun gear 6 and the planetary gear ring 8 and respectively meshed with the sun gear 6 and the planetary gear ring 8, a rotor 31 of the motor 3 is coaxial with and fixedly connected with an axle of the sun gear 6, a planet carrier 9 is fixed on the axle of the planetary gear 7, and the planet carrier 9 is connected with or separated from the axle of the sun gear 6 through the clutch 4; the output shaft 1a of the engine 1 is fixedly connected with the planetary gear 8, and the planet carrier 9 is fixedly connected with the input shaft 51 of the gearbox 5.
More specifically, a dual mass flywheel 10 or a torsional damper is connected to an output shaft 1a of the engine 1, and a lock mechanism 2 is used to lock the dual mass flywheel 10 or the torsional damper. The motor 3 includes a rotor 31, a housing 33, and a stator 32 fixed to the housing 33. The lock mechanism 2 is fixed to the engine 1 or the housing 33. The locking mechanism 2 belongs to the prior art, and is an engine 1 locking mechanism 2 for an automobile hybrid power device as disclosed in China patent (application No. 201220414010.6), or an engine 1 flywheel locking device as disclosed in China patent (application No. 20151047474. X).
In addition, in the control method of the single-motor hybrid power driving system of the vehicle, the whole vehicle ECU can control the driving system to realize the following working modes: a pure electric mode, a starting mode, an idle power generation mode, an engine start mode, a power split mode, an energy recovery mode, a reverse mode, and a hybrid mode;
when the engine 1 does not work and the motor 3 works independently, the whole vehicle ECU controls the driving system to be in a pure electric mode; in the pure electric mode, the clutch 4 is in a disengaged state, the engine 1 is locked by the locking mechanism 2, the motor 3 drives the sun gear 6 to rotate, the planetary ring gear 8 is stationary, and the carrier 9 outputs power to the input shaft 51 of the transmission 5.
When the vehicle is stationary and the engine 1 needs to be started, the whole vehicle ECU controls the driving system to be in a starting working mode; in the start-up operation mode, there are three methods of starting the engine 1, the first method: the locking mechanism 2 is released, the brake is stepped on, the gearbox 5 is arranged on a gear, the clutch 4 is separated, and the motor 3 reversely drags the engine 1 to start; the second method is as follows: the locking mechanism 2 is released, the gearbox 5 is not positioned on a gear, the clutch 4 is combined, and the motor 3 drives the engine 1 to start; the third method is as follows: the locking mechanism 2 is released, the gearbox 5 is not in gear, the motor 3 rotates first, and the engine 1 is started through sliding friction of the clutch 4.
When the vehicle is stationary, the engine 1 is in an idle state, the gearbox 5 is in a neutral position, and the whole vehicle is braked; or when the vehicle runs to a red light intersection, the gearbox 5 is on a gear, and the whole vehicle is braked; the whole vehicle ECU controls the driving system to be in an idle power generation working mode; in the idle power generation operation mode, the clutch 4 is engaged at this time, and the engine 1 can generate power with the motor 3.
When the vehicle encounters traffic jam, the running is slow, the battery SOC value is low, and the motor 3 cannot be used for starting; the whole vehicle ECU controls the driving system to be in an engine starting working mode; in the engine start operating mode, the clutch 4 is in a disengaged state, and the output shaft 1a of the engine 1 drives the planetary gear 8 to output power to the input shaft 51 of the gearbox 5.
When the vehicle starts and runs normally, the engine 1 works, the gearbox 5 is in a gear state, the clutch 4 is in a separation state, and the whole vehicle ECU controls the driving system to be in a power split working mode; in the power split mode of operation, when the gearbox 5 requires low speed, low torque, the motor 3 may generate electricity to balance the torque and rotational speed of the input shaft 51 of the gearbox 5; when the gearbox 5 needs high speed and high torque, the motor 3 can drive the whole vehicle together with the engine 1.
When the vehicle needs to be decelerated and braked, the whole vehicle ECU controls the driving system to be in an energy recovery working mode; in the energy recovery operation mode, the ABS is deactivated at this time, and the vehicle brake deceleration is performed by the reverse-trailing power generation of the motor 3.
When the vehicle gear shifting handle is in a reverse gear position, the whole vehicle ECU controls the driving system to be in a reverse gear working mode; in the reverse operation mode, the clutch 4 is in a disengaged state, the engine 1 is not operated, the engine 1 is locked by the locking mechanism 2, and the motor 3 drives the input shaft 51 of the gearbox 5 to rotate in a reverse direction.
When the clutch 4 is in the engaged state, the engine 1 and the motor 3 are connected together, and the whole vehicle ECU controls the drive system to be in the hybrid power operation mode. In the hybrid power working mode, when the gearbox 5 is not in a gear, the motor 3 can be driven by the engine 1 to directly generate electricity; while the vehicle is running, the engine 1 and the motor 3 can drive the vehicle at the same time; when the vehicle is braked, the motor 3 can generate electricity by reverse dragging.
Embodiment two:
the technical scheme in this embodiment is basically the same as that in the first embodiment, except that, as shown in fig. 2, in this embodiment, the output shaft 1a of the engine 1 is fixedly connected with the carrier 9, and the planetary ring gear 8 is fixedly connected with the input shaft 51 of the transmission 5.
Embodiment III:
the technical scheme in this embodiment is basically the same as that in the second embodiment, except that, as shown in fig. 3, two sets of planet gears 7 meshed with each other and having concentric movement tracks are provided between the planet gear 8 and the sun gear 6 in this embodiment, wherein one set of planet gears 7 is meshed with the sun gear 6, and the other set of planet gears 7 is meshed with the planet gear 8. This solution adds a set of planet gears 7 for reversing the effect. The working mode is the same as the first scheme, and compared with the first scheme, the power split torque and the rotating speed are different, and the energy-saving effect can be achieved.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although terms such as the engine 1, the output shaft 1a, the lock mechanism 2, the motor 3, the rotor 31, the stator 32, the housing 33, the clutch 4, the transmission 5, the input shaft 51, the sun gear 6, the planetary gears 7, the planetary ring gear 8, the carrier 9, the dual mass flywheel 10, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.
Claims (8)
1. The single-motor hybrid power driving system of the vehicle comprises an engine (1), a locking mechanism (2) for locking the engine (1), a motor (3), a clutch (4) and a gearbox (5), and is characterized by further comprising a sun gear (6), a planetary gear (7) and a planetary gear ring (8) which are coaxially arranged, wherein the planetary gear (7) is positioned between the sun gear (6) and the planetary gear ring (8) and meshed with the sun gear and the planetary gear ring respectively, a rotor (31) of the motor (3) is coaxial with and fixedly connected with a wheel shaft of the sun gear (6), a planet carrier (9) is fixed on the wheel shaft of the planetary gear (7), and the planet carrier (9) is connected with or separated from the wheel shaft of the sun gear (6) through the clutch (4); an output shaft (1 a) of the engine (1) is directly fixedly connected with a planetary gear ring (8), and the planet carrier (9) is directly fixedly connected with an input shaft (51) of the gearbox (5); when the vehicle starts and runs normally, the engine (1) works, the gearbox (5) is in a gear state, the clutch (4) is in a separation state, and the whole vehicle ECU controls the driving system to be in a power split working mode; in the power splitting working mode, when the gearbox (5) needs high speed and high torsion, the motor (3) can drive the whole vehicle together with the engine (1); when the vehicle runs into traffic jam, the running speed is low, the battery SOC value is low, and the motor (3) cannot be used for starting; the whole vehicle ECU controls the driving system to be in an engine starting working mode; in the engine starting working mode, the clutch (4) is in a separation state, and the output shaft (1 a) of the engine (1) drives the planetary gear ring (8) to output power to the input shaft (51) of the gearbox (5).
2. A control method of a single motor hybrid drive system of a vehicle according to claim 1, characterized in that the whole vehicle ECU is capable of controlling the drive system to realize the following operation modes: a pure electric mode, a starting mode, an idle power generation mode, an engine start mode, a power split mode, an energy recovery mode, a reverse mode, and a hybrid mode;
when the engine (1) does not work and the motor (3) works independently, the whole vehicle ECU controls the driving system to be in a pure electric mode;
when the vehicle is stationary and the engine (1) needs to be started, the whole vehicle ECU controls the driving system to be in a starting working mode;
when the vehicle is stationary, the engine (1) is in an idle state, the gearbox (5) is in a neutral position, and the whole vehicle is braked; or when the vehicle runs to a red light intersection, the gearbox (5) is arranged on a gear, and the whole vehicle is braked; the whole vehicle ECU controls the driving system to be in an idle power generation working mode;
when the vehicle needs to be decelerated and braked, the whole vehicle ECU controls the driving system to be in an energy recovery working mode;
when the vehicle gear shifting handle is in a reverse gear position, the whole vehicle ECU controls the driving system to be in a reverse gear working mode;
when the clutch (4) is in a combined state, the engine (1) and the motor (3) are connected together, and the whole vehicle ECU controls the driving system to be in a hybrid power working mode.
3. A control method of a single motor hybrid drive system of a vehicle according to claim 2, characterized in that in the pure electric mode, the clutch (4) is in a disengaged state, the engine (1) is locked by the locking mechanism (2), the motor (3) drives the sun gear (6) to rotate, the planetary ring gear (8) is stationary, and the carrier (9) outputs power to the input shaft (51) of the gearbox (5).
4. A control method of a single motor hybrid drive system of a vehicle according to claim 2, characterized in that in the start-up operation mode there are three methods of starting the engine (1), the first method: the locking mechanism (2) is released, the brake is stepped on, the gearbox (5) is arranged on a gear, the clutch (4) is separated, and the motor (3) reversely drags the engine (1) to start; the second method is as follows: the locking mechanism (2) is released, the gearbox (5) is not positioned on a gear, the clutch (4) is combined, and the motor (3) drives the engine (1) to start; the third method is as follows: the locking mechanism (2) is released, the gearbox (5) is not positioned at a gear, the motor (3) rotates firstly, and the engine (1) is started through sliding friction of the clutch (4).
5. A control method of a single motor hybrid drive system of a vehicle according to claim 2, characterized in that in the idle power generation operation mode, when the clutch (4) is in an engaged state, the engine (1) can carry the motor (3) for generating power.
6. The method of controlling a single motor hybrid drive system of a vehicle according to claim 2, characterized in that in the power split operating mode, when the gearbox (5) requires low speed, low torque, the motor (3) can generate electricity to balance the torque and rotational speed of the input shaft (51) of the gearbox (5).
7. The control method of a single motor hybrid drive system of a vehicle according to claim 2, characterized in that in the energy recovery operation mode, ABS is not activated at this time, and vehicle braking deceleration is performed by reverse-dragging power generation of the motor (3).
8. The control method of a single motor hybrid drive system of a vehicle according to claim 2, characterized in that in the hybrid operation mode, when the transmission (5) is not in gear, the engine (1) drives the motor (3) to directly generate electricity; during running of the vehicle, the engine (1) and the motor (3) can drive the vehicle at the same time; when the vehicle is braked, the motor (3) can generate electricity by reverse dragging.
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| CN111976464B (en) * | 2020-08-31 | 2023-09-19 | 东风汽车集团有限公司 | Hybrid vehicle driving system utilizing motor for speed regulation during gear shifting |
| CN111976463B (en) * | 2020-08-31 | 2023-12-26 | 东风汽车集团有限公司 | Hybrid vehicle driving system capable of realizing single-motor two-gear driving |
| CN112977374B (en) * | 2021-02-26 | 2022-06-03 | 徐工集团工程机械股份有限公司科技分公司 | Pilot type engineering machinery anti-lock brake system and engineering machinery |
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