CN109353208B - Hybrid power assembly and control method thereof - Google Patents
Hybrid power assembly and control method thereof Download PDFInfo
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- CN109353208B CN109353208B CN201811142841.0A CN201811142841A CN109353208B CN 109353208 B CN109353208 B CN 109353208B CN 201811142841 A CN201811142841 A CN 201811142841A CN 109353208 B CN109353208 B CN 109353208B
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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
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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
- B60K6/36—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
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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
- B60K6/40—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 assembly or relative disposition of components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Automation & Control Theory (AREA)
- Hybrid Electric Vehicles (AREA)
- Structure Of Transmissions (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a hybrid power assembly which comprises an engine, a first motor and an output shaft, wherein a rotor shaft of the first motor is fixedly connected with a crankshaft of the engine, the rotor shaft of the first motor is connected with a vibration reduction element in a gearbox, an input combination gear ring is arranged on the vibration reduction element, and the input combination gear ring can be connected with a first gear which is sleeved on the output shaft in an empty mode through a first sliding sleeve. According to the scheme, the rotor shaft of the first motor is directly and fixedly connected with the crankshaft of the engine, so that the high integration of the first motor and the engine is realized, the axial length can be shortened, and the cost is reduced; the working condition that the engine directly participates in driving is enlarged, the working condition is optimized, the efficiency is improved, and the efficiency of the hybrid power assembly can be further improved by increasing gears; the hybrid power assembly has the advantages of compact overall structure, high integration level, strong dynamic property and high vehicle trafficability property. The invention also discloses a control method of the hybrid power assembly.
Description
Technical Field
The invention relates to the technical field of hybrid vehicles, in particular to a hybrid power assembly and a control method thereof.
Background
At present, hybrid systems of hybrid vehicles mainly have three forms: 1) ECVT series-parallel systems (e.g., toyota pluris); 2) engine + ISG + clutch + TM; 3) engine + ISG + AMT + TM. Among them, ecvt (electronic continuously Variable transmission) is an electrically controlled continuously Variable automatic transmission. Isg (integrated starter and generator), which can be used as a driving motor to start the engine, or as a generator, or as a driving motor to drive the vehicle. Tm (traction motor) is a drive motor, and may be used in a power generation mode during vehicle braking. AMT (automated mechanical Transmission) is an automatic transmission of an electric control mechanical type.
The schematic diagram of the scheme 1) is shown in fig. 1, the working range of the engine 01 can be optimized by controlling the motor 02, so that the engine 01 always works in a high-efficiency region, the oil saving rate is relatively high, but the control is relatively complex, and double coupling and decoupling of torque and rotating speed are involved.
As shown in fig. 2, the generator 03 and the driving motor 04 are connected through a clutch, which is a mainstream form in the market at the early stage, the power performance of the generator is general, the working rotating speed range of the engine 01 is large, and the cost is high due to the adoption of a large-torque driving motor.
In the scheme 3) of the hybrid system, on the basis of the scheme 2), a 2-4-gear AMT is additionally arranged between the generator and the driving motor to replace a clutch, so that the working condition of the engine is improved, the power performance is improved to some extent, but the cost is still higher because the driving motor is directly driven.
Therefore, how to optimize the structure and operation of the hybrid powertrain is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a hybrid assembly and a control method thereof, wherein the hybrid assembly has a compact structure and a high integration level, and can improve the operation condition of a driving motor and reduce the torque and power of the motor; the control method can avoid power interruption and improve driving comfort and acceleration; the working condition of the engine is adjusted, and the working efficiency of the engine is improved.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a hybrid power assembly, includes engine, first motor, output shaft, the rotor shaft of first motor with the bent axle of engine links firmly, the rotor shaft of first motor with damping component in the gearbox is connected, be equipped with input combination ring gear on the damping component, input combination ring gear accessible first sliding sleeve is in with the idle cover first gear connection on the output shaft.
Preferably, the hybrid power assembly further comprises a second motor and a gear shifting execution mechanism, the output shaft is fixedly connected with an output combination gear ring, and a second gear and at least one gear are also sleeved on the output shaft in an empty manner;
the rotor shaft of the second motor is normally connected with a second sliding sleeve in the gearbox and can be connected with the output shaft through the second sliding sleeve and the output combination gear ring;
the second gear is normally connected with a second combined gear ring, and the second combined gear ring can be connected with a rotor shaft of the second motor through the second sliding sleeve;
the first gear is normally connected with a first combined gear ring, and the first combined gear ring can be connected with the output shaft through a third sliding sleeve;
each gear is correspondingly and often connected with a gear combination gear ring, and the gear combination gear ring can be connected with the output shaft through a corresponding gear shifting sliding sleeve.
Preferably, in the hybrid powertrain, the number of the gear gears is one, the gear gears are normally connected with a third combined ring gear, and the third combined ring gear can be connected with the output shaft through the third sliding sleeve.
Preferably, in the hybrid powertrain, the shift actuator is an electric shift actuator, a hydraulic shift actuator, or a pneumatic shift actuator.
The invention provides a hybrid power assembly which comprises an engine, a first motor and an output shaft, wherein a rotor shaft of the first motor is fixedly connected with a crankshaft of the engine, the rotor shaft of the first motor is connected with a vibration reduction element in a gearbox, an input combination gear ring is arranged on the vibration reduction element, and the input combination gear ring can be connected with a first gear which is sleeved on the output shaft in an empty mode through a first sliding sleeve.
The scheme cancels starting systems such as an engine gear ring and the like in the original hybrid power assembly, simplifies a flywheel, directly and fixedly connects a rotor shaft of the first motor with a crankshaft of the engine, and realizes high integration of the first motor and the engine, thereby shortening the axial length and reducing the cost; the working condition that the engine directly participates in driving is enlarged, the working condition is optimized, the efficiency is improved, and the efficiency of the hybrid power assembly can be further improved by increasing gears; the hybrid power assembly has the advantages of compact overall structure, high integration level, strong dynamic property and high vehicle trafficability property.
The invention also provides a control method for the hybrid power assembly, and when the hybrid power assembly shifts gears, the shift control method comprises the following steps:
the second motor is used for removing torque, the gear shifting execution mechanism pushes the second sliding sleeve to be shifted to a neutral gear, the speed of the second motor is regulated to a calculated rotating speed, then the second sliding sleeve is pushed to be shifted and is jointed with the output combined gear ring, and the second motor recovers torque to carry out direct driving;
the engine and the first motor are torque-off, the gear-shifting executing mechanism pushes the gear-shifting sliding sleeve to be shifted to a neutral gear, the first motor adjusts the speed to a calculated rotating speed, then the gear-shifting sliding sleeve pushes the gear to be shifted and is jointed with the gear combination gear ring, and the engine or the first motor recovers torque and is driven by a target gear;
the second motor is used for removing torque, the gear shifting execution mechanism pushes the second sliding sleeve to be taken to a neutral gear, the speed of the second motor is regulated to a calculated rotating speed, then the second sliding sleeve is pushed to be put into gear and is jointed with the second combined gear ring, and the torque of the second motor is recovered and is driven by the engine and the first motor in the same target gear.
In the control method provided by the invention, the second motor is provided with a plurality of gears, so that the working condition of the motor can be optimized, and the torque, the power and the cost of the motor can be reduced. In the gear shifting process, the second motor is used for directly driving, no power interruption is caused, the working conditions of the engine and the driving motor are optimized, and the efficiency is improved, so that the driving comfort and the acceleration are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional ECVT series-parallel system;
FIG. 2 is a schematic diagram of a conventional engine + ISG + clutch + TM hybrid system;
FIG. 3 is a schematic illustration of a hybrid powertrain in an embodiment of the present invention.
In fig. 1 to 3:
01-engine, 02-motor, 03-generator, 04-driving motor;
1-engine, 2-first motor, 3-second motor, 5-output shaft, 11-input combined gear ring, 21-first combined gear ring, 22-second combined gear ring, 23-third combined gear ring, 31-first gear, 32-second gear, 33-third gear, 41-first sliding sleeve, 42-second sliding sleeve, 43-third sliding sleeve and 51-output combined gear ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 3, fig. 3 is a schematic diagram of a hybrid powertrain according to an embodiment of the invention.
A hybrid power assembly comprises an engine 1, a first motor 2 and an output shaft 5, wherein a rotor shaft of the first motor 2 is fixedly connected with a crankshaft of the engine 1, the rotor shaft of the first motor 2 is connected with a vibration reduction element in a gearbox, an input combination gear ring 11 is arranged on the vibration reduction element, the input combination gear ring 11 can be connected with a first gear 31 which is sleeved on the output shaft 5 in an empty mode through a first sliding sleeve 41, and the structure is used for realizing the separation and connection of an engine + first motor power unit and a rear power transmission system.
The scheme cancels starting systems such as an engine gear ring and the like in the original hybrid power assembly, simplifies a flywheel, directly and fixedly connects a rotor shaft of the first motor 2 with a crankshaft of the engine 1, and realizes high integration of the first motor 2 and the engine 1, thereby shortening the axial length and reducing the cost; the working condition that the engine 1 directly participates in driving is enlarged, the working condition is optimized, the efficiency is improved, and the efficiency of the hybrid power assembly can be further improved by increasing gears; the hybrid power assembly has the advantages of compact overall structure, high integration level, strong dynamic property and high vehicle trafficability property.
It should be noted that the hybrid power assembly further includes a second motor 3 and a shift execution mechanism, an output shaft 5 is fixedly connected with an output combination gear ring 51, and a second gear 32 and at least one gear are also sleeved on the output shaft 5;
the rotor shaft of the second motor 3 is normally connected with a second sliding sleeve 42 in the gearbox, and can be connected with the output shaft 5 through the second sliding sleeve 42 and an output combination gear ring 51;
the second gear 32 is normally connected with the second combined gear ring 22, and the second combined gear ring 22 can be connected with the rotor shaft of the second motor 3 through a second sliding sleeve 42;
the first gear 31 is normally connected with the first combined gear ring 21, and the first combined gear ring 21 can be connected with the output shaft 5 through the third sliding sleeve 43;
each gear wheel is usually associated with a gear coupling toothing which can be connected to the output shaft 5 via a corresponding shifting sleeve.
The first gear 31, the second gear 32 and the other gearwheels mesh with corresponding gearwheels fixed on the intermediate shaft.
In a preferred embodiment, as shown in fig. 3, the number of the gear wheels is one, in this embodiment, the gear wheel is a third gear wheel 33, the third gear wheel 33 is normally connected with a third combined ring gear 23 (i.e. a gear combined ring gear), and the third combined ring gear 23 can be connected with the output shaft 5 through a third sliding sleeve 43.
It should be noted that, in the hybrid powertrain, the shift actuator is an actuator integrating a plurality of mutually independent shifts, and may specifically be an electric shift actuator, a hydraulic shift actuator, or a pneumatic shift actuator.
The hybrid power assembly provided by the scheme has the following 6 main modes: (1) a purely electric mode; (2) a series mode; (3) a parallel mode; (4) a series-parallel mode; (5) a parking power generation mode; (6) engine only mode. The remaining functions such as limp home function, creep drive function, hill start assist function, etc. are not described in detail.
The first motor 2 in this scheme is always continuous with engine 1, has two fender positions simultaneously, compares in the current scheme 2 of saying in the background art), and the engine directly participates in the driven operating mode and enlarges, and the operating mode is optimized, and efficiency improves. Naturally, in order to further improve the efficiency of the assembly, it is possible to increase the gears, i.e. by means of a plurality of gear gears being slipped over the output shaft 5 and cooperating with a plurality of shifting shoes, but the overall axial length, manufacturing costs, NVH, complexity, etc. will increase somewhat. The working condition that the engine directly participates in driving in the deep mixing system accounts for about 30%, and the engine only directly participates in driving in medium-high speed driving, so that the engine does not need excessive gears in urban road driving or main medium-low speed driving vehicles. The second motor 3 has three gears, so that the working condition of the motor can be optimized, the torque and the power of the motor are reduced, and the cost of the motor is reduced.
In addition, the scheme integrates the vibration reduction element into the gearbox, and can lubricate and cool the vibration reduction element driving disk, the vibration reduction element driving disk and the vibration reduction element spring by using gearbox gear oil, so that the reliability is improved.
The invention also provides a control method for the hybrid power assembly, and when the hybrid power assembly shifts gears, the shift control method comprises the following steps:
the second motor 3 is used for clearing torque, the gear shifting execution mechanism pushes the second sliding sleeve 42 to be disengaged to a neutral gear, the speed of the second motor 3 is regulated to a first calculated rotating speed, then the second sliding sleeve 42 is pushed to be engaged and is jointed with the output combined gear ring 51, and the second motor 3 recovers torque to be directly driven;
the engine 1 and the first motor 2 are used for torque clearing, the gear shifting execution mechanism pushes the gear shifting sliding sleeve to be shifted to a neutral gear, the first motor 2 adjusts the speed to a second calculated rotating speed, then the gear shifting sliding sleeve pushes the gear to be shifted and is jointed with the gear combination gear ring, and the engine 1 or the first motor 2 recovers torque and is driven by a target gear;
the second motor 3 is torque-cleared, the gear shifting execution mechanism pushes the second sliding sleeve 42 to be disengaged to a neutral gear, the speed of the second motor 3 is regulated to a third calculated rotating speed, then the second sliding sleeve 42 is pushed to be engaged and is jointed with the second combined gear ring 22, and the second motor 3 recovers torque and is driven by the engine 1 and the first motor 2 in the same target gear.
It should be noted that the first calculated rotation speed, the second calculated rotation speed, and the third calculated rotation speed are rotation speeds required when the gear is shifted to the target gear corresponding to each motor, and are not described herein again.
In the control method provided by the invention, the second motor 3 has a plurality of gears, so that the working condition of the motor can be optimized, and the torque, the power and the cost of the motor can be reduced. In the gear shifting process, the second motor 3 is firstly used for directly driving, no power interruption is caused, the working conditions of the engine 1 and the driving motor are optimized, and the efficiency is improved, so that the driving comfort and the acceleration are improved.
Referring to fig. 3, the following describes an implementation of a control method for a vehicle to which the hybrid powertrain according to the present invention is applied through a specific control process:
(1) and (4) self-checking the vehicle when the vehicle is electrified. And (4) self-checking the actual position of each sliding sleeve, and whether each controller, sensor and actuating mechanism are normal or not. And if the sliding sleeves are not in the neutral gear, the sliding sleeves are taken to the neutral gear.
(2) Vehicle Start. The shift actuator pushes the second runner 42 into gear backwards (to the right in the figure), engaging the second conjugated ring gear 22. The shift actuator pushes the third shift sleeve 43 into a rearward (rightward in the drawing) gear engagement with the third conjugated ring gear 23.
(3) And (5) starting the vehicle. The second motor 3 outputs torque according to a Control instruction sent by a vehicle accelerator pedal calibration torque MAP in response to an HCU (Hybrid Control Unit, an electric Control Unit of a Hybrid assembly, and an electric Control system of the Hybrid assembly), and the vehicle starts in an electric only mode.
(4) The vehicle runs at a low speed. The HCU enters a series mode at the right moment according to the SOC (State of Current, State of charge, representing the residual electric quantity of the battery), the torque demand of the whole vehicle and the vehicle speed. The first motor 2 responds to an engine back-and-forth dragging command sent by the HCU to start the engine 1, and the engine 1 drives the first motor 2 to generate power after being started.
(5) And switching the vehicle modes. And driving in the pure electric mode until a calibrated mode switching condition is reached. The first motor 2 starts the engine 1 in response to an engine drag command sent from the HCU and drags to within the calculated rotational speed range. The shift actuator pushes the first sliding sleeve 41 forward (to the left in the figure) into gear, engaging the input of the damping element in conjunction with the ring gear 11. The engine 1 participates in driving. The HCU determines a powertrain mode according to vehicle running condition data (vehicle required torque and vehicle speed): engine only mode, parallel mode, series-parallel mode.
(6) And (5) shifting the vehicle. When the vehicle reaches the gear shifting condition, the following gear shifting processes are carried out:
a) the second motor 3 clears the torque (reduces the torque to below the calibrated value), the gear shifting actuating mechanism pushes the second sliding sleeve 42 to shift forward (leftward in the figure), the speed of the second motor 3 is regulated to the calculated rotating speed, and then the gear is shifted forward and is jointed with the output combined gear ring 51. The second motor 3 recovers the torque to carry out direct drive, and power interruption is avoided;
b) the engine 1 and the first motor 2 are turned, the gear shifting actuating mechanism pushes the third sliding sleeve 43 to be shifted forward (leftward in the figure), the first motor 2 is adjusted to the calculated rotating speed, and then the gear is shifted forward to be engaged with the first combined gear ring 21. The engine 1 or the first electric machine 2 recovers torque to drive the vehicle in the direct gear;
c) the second motor 3 is turned off, the gear shifting actuating mechanism pushes the second sliding sleeve 42 to shift backwards (rightwards in the figure), the speed of the second motor 3 is regulated to the calculated rotating speed, and then the gear is shifted backwards to be jointed with the second combined gear ring 22. The second motor 3 recovers the torque and drives the vehicle in the same gear with the engine 1 and the first motor 2.
(7) The vehicle decelerates. The second motor 3 responds to a control instruction sent by the HCU according to the calibration torque MAP of the brake pedal of the whole vehicle to brake and generate power. If the vehicle decelerates, when the vehicle speed reaches the calibrated engine flameout vehicle speed range, the HCU sends a flameout command to the engine 1, and the HCU controls the gear shifting execution mechanism to push the first sliding sleeve 41 to be shifted backwards, so that the connection between the engine and the first motor power unit and the vehicle is disconnected. And if the vehicle speed does not reach the calibrated engine flameout vehicle speed range and does not reach the calibrated downshift condition after the vehicle deceleration process is finished, the HCU controls the power assembly to recover the torque according to the torque distribution strategy to drive the vehicle. If the vehicle speed does not reach the calibrated flameout vehicle speed range of the engine but reaches the calibrated downshift condition after the vehicle deceleration process is finished, the HCU controls the second motor 3, the first motor 2, the engine 1, the gear shifting executing mechanism and the like of the power assembly to downshift, and the downshift process is as follows:
a) the second motor 3 clears the torque (reduces the torque to below the calibrated value), the gear shifting actuating mechanism pushes the second sliding sleeve 42 to shift forward (leftward in the figure), the speed of the second motor 3 is regulated to the calculated rotating speed, and then the gear is shifted forward and is jointed with the output combined gear ring 51. The second motor 3 recovers the torque to carry out direct drive, and power interruption is avoided;
b) the engine 1 and the first motor 2 are turned, the gear shifting actuating mechanism pushes the third sliding sleeve 43 to be shifted backwards, the first motor 2 is adjusted to the calculated rotating speed, and then the gear is shifted forwards to be jointed with the third combined gear ring 23. The engine 1 or the first electric machine 2 recovers torque to drive the vehicle in the first gear.
c) The second motor 3 is turned off, the gear shifting actuating mechanism pushes the second sliding sleeve 42 to shift backwards (rightwards in the figure), the speed of the second motor 3 is regulated to the calculated rotating speed, and then the gear is shifted backwards to be jointed with the second combined gear ring 22. The second motor 3 recovers the torque and drives the vehicle in the same gear with the engine 1 and the first motor 2.
(8) The vehicle is stopped. After the vehicle stops, the shift actuator pushes the first sliding sleeve 41 to neutral, pushes the second sliding sleeve 42 to engage with the second combined ring gear 22, and pushes the third sliding sleeve 43 to engage with the third combined ring gear 23.
(9) And powering off the vehicle. After the gear shifting actuating mechanism is self-checked, each sliding sleeve is pushed to a neutral gear.
The invention has the following beneficial effects:
1. avoiding power interruption of the power assembly.
2. The working conditions of the engine and the driving motor are optimized, and the efficiency is improved.
3. The power performance is strong, and the trafficability characteristic of the whole vehicle is high.
4. The whole power assembly has compact structure and high integration level, and is suitable for the high integration level of a 2+ 3-gear gearbox under the working conditions of an engine and a motor of a hybrid system.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A hybrid power assembly is characterized by comprising an engine (1), a first motor (2), a second motor (3), an output shaft (5) and a gear shifting execution mechanism, wherein a rotor shaft of the first motor (2) is fixedly connected with a crankshaft of the engine (1), the rotor shaft of the first motor (2) is connected with a vibration reduction element in a gearbox, an input combination gear ring (11) is arranged on the vibration reduction element, and the input combination gear ring (11) can be connected with a first gear (31) which is sleeved on the output shaft (5) in an empty mode through a first sliding sleeve (41);
the output shaft (5) is fixedly connected with an output combination gear ring (51), and a second gear (32) and at least one gear are also sleeved on the output shaft (5) in an empty way;
the rotor shaft of the second motor (3) is normally connected with a second sliding sleeve (42) in the gearbox and can be connected with the output shaft (5) through the second sliding sleeve (42) and the output combination gear ring (51);
the second gear (32) is normally connected with a second combined gear ring (22), and the second combined gear ring (22) can be connected with a rotor shaft of the second motor (3) through the second sliding sleeve (42);
the first gear (31) is normally connected with a first combined gear ring (21), and the first combined gear ring (21) can be connected with the output shaft (5) through a third sliding sleeve (43);
each gear is usually connected with a gear combination gear ring corresponding to the gear, and the gear combination gear ring can be connected with the output shaft (5) through a corresponding gear shifting sliding sleeve.
2. Hybrid powertrain according to claim 1, characterised in that said gear wheels are present in a single number, said gear wheels being permanently connected to a third combined ring gear (23), said third combined ring gear (23) being connectable to said output shaft (5) by means of said third sliding sleeve (43).
3. A hybrid powertrain according to claim 1 or 2, characterised in that the shift actuator is an electric shift actuator, or a hydraulic shift actuator, or a pneumatic shift actuator.
4. A control method of a hybrid powertrain for a hybrid powertrain as claimed in any one of claims 1 to 3, characterized in that when the hybrid powertrain is shifted, the shift control method is as follows:
the second motor (3) is used for removing torque, the gear shifting executing mechanism pushes the second sliding sleeve (42) to be in a neutral gear, the second motor (3) is used for regulating the speed to a calculated rotating speed, then the second sliding sleeve (42) is pushed to be in a gear and is jointed with the output combination gear ring (51), and the second motor (3) recovers torque to be directly driven;
the engine (1) and the first motor (2) are used for removing torque, the gear shifting actuating mechanism pushes the gear shifting sliding sleeve to be shifted to a neutral gear, the first motor (2) adjusts the speed to a calculated rotating speed, then the gear shifting sliding sleeve pushes the gear to be shifted and is jointed with the gear combining gear ring, and the engine (1) or the first motor (2) recovers torque and is driven by a target gear;
the second motor (3) is turned round clearly, the actuating mechanism that shifts promotes second sliding sleeve (42) is plucked to neutral, second motor (3) speed governing is to calculating the rotational speed, will again second sliding sleeve (42) promote the engage with second combines ring gear (22) joint, second motor (3) resume the moment of torsion and with engine (1) and first motor (2) are with the same target gear drive.
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| CN113874235B (en) * | 2019-04-12 | 2024-05-17 | 潍柴动力股份有限公司 | Hybrid power system |
| CN111038244A (en) * | 2019-12-31 | 2020-04-21 | 潍柴动力股份有限公司 | Hybrid power system and vehicle |
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