CN103863323A - Full hybrid electric vehicle energy management system and control method - Google Patents
Full hybrid electric vehicle energy management system and control method Download PDFInfo
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- CN103863323A CN103863323A CN201210531554.5A CN201210531554A CN103863323A CN 103863323 A CN103863323 A CN 103863323A CN 201210531554 A CN201210531554 A CN 201210531554A CN 103863323 A CN103863323 A CN 103863323A
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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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
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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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
- B60W10/11—Stepped gearings
- B60W10/115—Stepped gearings with planetary gears
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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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- 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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/10—Change speed gearings
- B60W2710/105—Output torque
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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
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- Combustion & Propulsion (AREA)
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- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The invention relates to a full hybrid electric vehicle energy management system. The full hybrid electric vehicle energy management system comprises a vehicle system controller, an engine controller, a clutch controller, a motor controller, an AMT (Automated Mechanical Transmission) controller and a storage battery controller; the engine controller is connected with an engine; the clutch controller is connected with a wet type multi-plate clutch; the motor controller is connected with an ISG (Integrated Starter Generator) motor; the AMT controller is connected with a transmission; the storage battery controller is connected with a storage battery; the storage battery is connected with the ISG motor through an inverter; a controller of subsystems and the vehicle system controller are in communication. The invention also relates to a control method for the full hybrid electric vehicle energy management system. The full hybrid electric vehicle energy management system and the control method thereof can effectively reduce output torque fluctuation during the switching process of working conditions of a full hybrid electric vehicle, improve the dynamic performance and smooth performance of the integral vehicle, increase the service life of important parts of the integral vehicle and achieve stably transferred mode switch between the working conditions and torque management under the working conditions.
Description
Technical field
The invention belongs to the drive-control technique of motor vehicle driven by mixed power, be specifically related to a kind of severe hybrid power automobile energy management control system and control method.
Background technology
Compared with orthodox car, hybrid vehicle has increased motor, battery, and control system is more complicated, and therefore, the exploitation of whole-control system just becomes hybrid vehicle gordian technique.And the research of the current control problem for the moving system of severe mixing focuses mostly at steady-state process such as energy management strategy and efficiency optimizations, relatively less for dynamic process control research.Particularly for utilizing planet row to carry out the severe hybrid power system of power coupling, torque, rotation speed relation complexity, the dynamic characteristics of driving engine and motor is inconsistent again, if propulsion source and driving system are not coordinated to control in the time that system drive mode of operation switches, by causing vehicle to occur large torque ripple in the time that drive pattern switches, affect car load dynamic property, travelling comfort and drive disk assembly life-span.
Summary of the invention
The object of the invention is to overcome the weak point of prior art, a kind of severe hybrid power automobile energy management control system is provided, can effectively reduce output torque fluctuation in the each operating mode handoff procedure of severe hybrid power automobile, improve car load dynamic property and ride comfort, increase the service life of car load important spare part.
Another object of the present invention is to provide a kind of control method of severe hybrid power automobile energy management control system, can realize the smooth transfer between each operating mode pattern switch and each operating mode under torque management.
The technical solution adopted for the present invention to solve the technical problems is:
1. use SOC(battery electric quantity) as the benchmark of car load driving mode, according to the variation of SOC, with reference to other variable factors such as the car load speed of a motor vehicle, rotating speeds, car load mode of operation is carried out to reasonable actv. switching;
2. entire car controller strategy comprises two parts: torque management strategy and pattern switchover policy.
Torque management strategy is that pattern is switched the basis that moment of torsion coordination is controlled.Torque management strategy, according to current driver's operation information, whole vehicle state information and each subassembly status information, calculates present engine target torque and motor target torque, sends target torque signal to engine controller and electric machine controller simultaneously.
A kind of severe hybrid power automobile energy management control system of the present invention, comprises vehicle system controller, the engine controller, clutch controller, electric machine controller, AMT controller and the battery controller that are connected with vehicle system controller; Engine controller is connected with driving engine, clutch controller is connected with multi-disc wet clutch, electric machine controller is connected with ISG motor, AMT controller is connected with change-speed box, battery controller is connected with storage battery, storage battery is connected with ISG motor by inverter, and each subsystem controller and vehicle system controller communicate; Described driving engine mouth is connected with the gear ring of dynamic coupling device planet row with ISG motor through free-wheel clutch, multi-disc wet clutch, the sun wheel of dynamic coupling device planet row is connected with the rotor of ISG motor, power is connected by the pinion carrier of planet row and the input end of change-speed box, the mouth of change-speed box is connected with main reduction gear, and power is reached wheel by main reduction gear.
The control method of a kind of severe hybrid power automobile energy management control system of the present invention, its step is as follows:
The first step, running state and the parameter thereof of analyzing each critical component of system under different working modes change;
1) pure electronic operating mode: when driving engine does not start, the sun wheel of ISG motor forward drive dynamic coupling device planet row; Because vehicle drag acts in the pinion carrier of dynamic coupling device planet row, cause the gear ring of dynamic coupling device planet row to there is the trend of reversion, multi-disc wet clutch separates, driving engine is not worked, ISG motor output torque, and reach pinion carrier through the sun wheel of dynamic coupling device planet row, now, power drive (being change-speed box and main reduction gear) amplifies the driving torque of ISG motor, drives vehicle start and low speed driving, introduces engine power reaching after certain speed of a motor vehicle;
2) driving engine drives separately: drive separately in operating mode at driving engine, and multi-disc wet clutch coupling, the idle running of ISG motor, the moment of torsion of driving engine output exports the input end of change-speed box to through gear ring to the pinion carrier of dynamic coupling device planet row;
3) combination drive:
A. in the time there is heavy load low cruise operating mode, multi-disc wet clutch is coupled, ISG motor output torque, and now, dynamic coupling device planet row is locked, and transmitting ratio is to be input to change-speed box after the moment of torsion of 1, ISG motor and driving engine is coupled;
B. in the time there is the little load running operating mode of high speed, multi-disc wet clutch separates, and power drive can be realized power coupling, after ISG motor and engine torque coupling, is input to change-speed box;
4) braking energy reclaims:
A. multi-disc wet clutch separation regeneration generating: in parallel drive process, step on braking, multi-disc wet clutch separates, ISG motor output negative torque is braked car load;
B. braking regenerative electric power in parallel: in the time only relying on the negative moment of ISG motor can not meet car load braking requirement, multi-disc wet clutch coupling, utilizes the towing astern moment of driving engine to brake car load;
C. idling electric braking: when car load is in idling, when ISG motor can provide enough brake torque, multi-disc wet clutch separates, and ISG motor output negative torque is braked car load;
5) driving fire an engine: when driving, while needing engine operation, multi-disc wet clutch coupling, ISG motor output torque distributes through the sun wheel of dynamic coupling device planet row, part moment of torsion is used for driving vehicle, and another part is used for fire an engine in short-term;
6) idling charging: because the electric weight of storage battery is too low, engine idle, charges the battery by ISG motor;
Second step, determines torque management strategy;
Torque management Policy model comprises that pattern is switched moment of torsion prearranged assignment, pattern switching condition determines and propulsion source target torque is determined, wherein moment of torsion prearranged assignment strategy comprises the identification of chaufeur moment of torsion and the identification of battery charging moment of torsion;
Chaufeur is applied the demand of the power on wheel is converted to the torque demand to change-speed box mouth, after having considered that transmission gear ratio is on the impact of the speed of a motor vehicle, obtain driving engine, the corresponding relation of ISG motor speed under different gears, the different speed of a motor vehicle, by the torque peak that can provide when driving engine and ISG motor are worked is provided simultaneously, driving torque demand curve when making these envelope of curves lines and just can obtaining vehicle and entirely accelerate, the corresponding driving torque demand curve of determining section accelerator travel immediately; According to the change-speed box mouth demand torque obtaining, incorporating transmission speed ratio just can obtain change-speed box input end demand torque in driving process.
Beneficial effect of the present invention is, on the theoretical analysis basis of the drive pattern handoff procedure of the severe hybrid power system to dynamic coupling device planet row, design feasible actv. control policy, reduce the torque ripple in pattern handoff procedure, improved dynamic property and the stationarity of transmission of power.
Brief description of the drawings
Fig. 1 is severe hybrid power system schematic of the present invention;
Fig. 2 is storage battery SOC zone chart.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.
A kind of severe hybrid power automobile energy management control system shown in Figure 1, comprises vehicle system controller, the engine controller, clutch controller, electric machine controller, AMT controller and the battery controller that are connected with vehicle system controller; Engine controller is connected with driving engine 1, clutch controller is connected with multi-disc wet clutch 3, electric machine controller is connected with ISG motor 5, AMT controller is connected with change-speed box 8, battery controller is connected with storage battery 7, storage battery 7 is connected with ISG motor 5 by inverter 6, and each subsystem controller and vehicle system controller communicate; Described driving engine 1 mouth is connected with the gear ring of dynamic coupling device planet row 4 with ISG motor 5 through free-wheel clutch 2, multi-disc wet clutch 3, the sun wheel of dynamic coupling device planet row 4 is connected with the rotor of ISG motor 5, power is connected with the input end of change-speed box 8 by the pinion carrier of planet row 4, the mouth of change-speed box 8 is connected with main reduction gear 9, and power is reached wheel 10 by main reduction gear 9.
The control method of a kind of severe hybrid power automobile energy management control system of the present invention, its step is as follows:
In order accurately to make the moment of torsion coordination control strategy switching for different mode, the first step, running state and the parameter thereof of analyzing each critical component of system under different working modes change;
1) pure electronic operating mode: when driving engine does not start, the sun wheel of ISG motor 5 forward drive dynamic coupling device planet rows 4; Because vehicle drag acts in the pinion carrier of dynamic coupling device planet row 4, cause the gear ring of dynamic coupling device planet row 4 to there is the trend of reversion, multi-disc wet clutch 3 separates, driving engine 1 is not worked, ISG motor 5 output torques, and reach pinion carrier through the sun wheel of dynamic coupling device planet row 4, now, power drive (being change-speed box 8 and main reduction gear 9) amplifies the driving torque of ISG motor 5, drive vehicle start and low speed driving, introduce engine power reaching after certain speed of a motor vehicle;
2) driving engine drives separately: drive in operating mode separately at driving engine 1, multi-disc wet clutch 3 is coupled, and ISG motor 5 dallies, and the moment of torsion that driving engine 1 is exported exports the input end of change-speed box 8 to through gear ring to the pinion carrier of dynamic coupling device planet row 4;
3) combination drive:
A. in the time there is heavy load low cruise operating mode, multi-disc wet clutch 3 is coupled, ISG motor 5 output torques, and now, dynamic coupling device planet row 4 is locked, and transmitting ratio is to be input to change-speed box 8 after the moment of torsion of 1, ISG motor 5 and driving engine 1 is coupled;
B. in the time there is the little load running operating mode of high speed, multi-disc wet clutch 3 separates, and power drive can be realized power coupling, after ISG motor 5 and driving engine 1 moment of torsion coupling, is input to change-speed box 8;
4) braking energy reclaims:
A. multi-disc wet clutch separation regeneration generating: in parallel drive process, step on braking, multi-disc wet clutch 3 separates, and ISG motor 5 is exported negative torque car load is braked;
B. braking regenerative electric power in parallel: in the time only relying on the negative moment of ISG motor 5 can not meet car load braking requirement, multi-disc wet clutch 3 is coupled, and utilizes the towing astern moment of driving engine 1 to brake car load;
C. idling electric braking: when car load is in idling, when ISG motor 5 can provide enough brake torque, multi-disc wet clutch 3 separates, and ISG motor 5 is exported negative torque car load is braked;
5) driving fire an engine: when driving, while needing driving engine 1 to work, multi-disc wet clutch 3 is coupled, ISG motor 5 motor output torques distribute through the sun wheel of dynamic coupling device planet row 4, part moment of torsion is used for driving vehicle, and another part is used for fire an engine in short-term;
6) idling charging: because the electric weight of storage battery 7 is too low, engine idle, charges the battery by ISG motor 5;
Each operational mode state is summarized as follows shown in table:
Second step, determines torque management strategy;
Referring to Fig. 2, torque management Policy model comprises that pattern is switched moment of torsion prearranged assignment, pattern switching condition determines and propulsion source target torque is determined, wherein moment of torsion prearranged assignment strategy comprises the identification of chaufeur moment of torsion and the identification of battery charging moment of torsion;
Chaufeur is applied the demand of the power on wheel is converted to the torque demand to change-speed box 8 mouths, after having considered that transmission gear ratio is on the impact of the speed of a motor vehicle, obtain driving engine 1, the corresponding relation of ISG motor 5 rotating speeds under different gears, the different speed of a motor vehicle, by the torque peak that can provide when driving engine and ISG motor are worked is provided simultaneously, driving torque demand curve when making these envelope of curves lines and just can obtaining vehicle and entirely accelerate, the corresponding driving torque demand curve of determining section accelerator travel immediately; According to the change-speed box mouth demand torque obtaining, incorporating transmission speed ratio just can obtain change-speed box input end demand torque in driving process;
When storage battery 7 is operated in different SOC regions, its charge discharge efficiency difference; When driving, allow the SOC of storage battery be stabilized in certain region as far as possible; The storage battery that native system adopts, when its state-of-charge 0.35 to 0.75 this when interval, charge discharge efficiency is high, this region is called the work area of storage battery; When the SOC of storage battery lower than require limit value time, ISG motor can be to battery charge; Because the control variable in torque management strategy is moment of torsion, so the charging moment of torsion P that driving engine is provided
ch_reqbe converted into the demand T to charging moment of torsion
ch_req.
The present invention is efficient district higher limit SOC by the work area boundary representation of storage battery
hight, efficient district lower limit SOC
lowwith unavailable district higher limit SOC
min.When storage battery SOC is lower than SOC
mintime, forbid battery discharging, when battery SOC is lower than SOC
lowtime, storage battery needs active charge, when storage battery is during in efficient district, does not charge as far as possible;
Because engine operation work efficiency when the little load is lower, the basic criterion of switching as pattern is taken into account the charge discharge efficiency of electrokinetic cell simultaneously, and pattern is switched and carried out according to following rule:
Under different mode of operations, the target torque allocation scheme of propulsion source is not identical, and wherein, the target torque of driving engine is to determine according to the stable state universal curve MAP figure of aggregate demand moment of torsion and driving engine.As shown in the table:
N in table
e, n
m, n
cbe respectively engine speed, motor speed, pinion carrier rotating speed.
Claims (2)
1. a severe hybrid power automobile energy management control system, comprises vehicle system controller, it is characterized in that: vehicle system controller is connected with engine controller, clutch controller, electric machine controller, AMT controller and battery controller; Engine controller is connected with driving engine (1), clutch controller is connected with multi-disc wet clutch (3), electric machine controller is connected with ISG motor (5), AMT controller is connected with change-speed box (8), battery controller is connected with storage battery (7), storage battery (7) is connected with ISG motor (5) by inverter (6), and each subsystem controller and vehicle system controller communicate; Described driving engine (1) mouth is connected with the gear ring of dynamic coupling device planet row (4) with ISG motor (5) through free-wheel clutch (2), multi-disc wet clutch (3), the sun wheel of dynamic coupling device planet row (4) is connected with the rotor of ISG motor (5), power is connected with the input end of change-speed box (8) by the pinion carrier of planet row (4), the mouth of change-speed box (8) is connected with main reduction gear (9), and power is reached wheel (10) by main reduction gear (9).
2. the control method of a kind of severe hybrid power automobile energy management control system as claimed in claim 1, its step is as follows:
The first step, running state and the parameter thereof of analyzing each critical component of system under different working modes change;
1) pure electronic operating mode: when driving engine does not start, the sun wheel of ISG motor (5) forward drive dynamic coupling device planet row (4); Because vehicle drag acts in the pinion carrier of dynamic coupling device planet row (4), cause the gear ring of dynamic coupling device planet row (4) to there is the trend of reversion, multi-disc wet clutch (3) separates, driving engine (1) is not worked, ISG motor (5) output torque, and reach pinion carrier through the sun wheel of dynamic coupling device planet row (4), now, power drive amplifies the driving torque of ISG motor (5), drive vehicle start and low speed driving, introduce engine power reaching after certain speed of a motor vehicle;
2) driving engine drives separately: drive separately in operating mode at driving engine (1), multi-disc wet clutch (3) coupling, ISG motor (5) idle running, the moment of torsion of driving engine (1) output exports the input end of change-speed box (8) to through gear ring to the pinion carrier of dynamic coupling device planet row (4);
3) combination drive:
A. in the time there is heavy load low cruise operating mode, multi-disc wet clutch (3) is coupled, ISG motor (5) output torque, now, dynamic coupling device planet row (4) is locked, and transmitting ratio is to be input to change-speed box (8) after the moment of torsion of 1, ISG motor (5) and driving engine (1) is coupled;
B. in the time there is the little load running operating mode of high speed, multi-disc wet clutch (3) separates, and power drive can be realized power coupling, after ISG motor (5) and the coupling of driving engine (1) moment of torsion, is input to change-speed box (8);
4) braking energy reclaims:
A. multi-disc wet clutch separation regeneration generating: in parallel drive process, step on braking, multi-disc wet clutch (3) separates, ISG motor (5) output negative torque is braked car load;
B. braking regenerative electric power in parallel: in the time only relying on the negative moment of ISG motor (5) can not meet car load braking requirement, multi-disc wet clutch (3) coupling, utilizes the towing astern moment of driving engine (1) to brake car load;
C. idling electric braking: when car load is in idling, when ISG motor (5) can provide enough brake torque, multi-disc wet clutch (3) separates, and ISG motor (5) output negative torque is braked car load;
5) driving fire an engine: when driving, while needing driving engine (1) work, multi-disc wet clutch (3) coupling, ISG motor (5) motor output torque distributes through the sun wheel of dynamic coupling device planet row (4), part moment of torsion is used for driving vehicle, and another part is used for fire an engine in short-term;
6) idling charging: because the electric weight of storage battery (7) is too low, engine idle, charges the battery by ISG motor (5);
Second step, determines torque management strategy;
Torque management Policy model comprises that pattern is switched moment of torsion prearranged assignment, pattern switching condition determines and propulsion source target torque is determined, wherein moment of torsion prearranged assignment strategy comprises the identification of chaufeur moment of torsion and the identification of battery charging moment of torsion;
Chaufeur is applied the demand of the power on wheel is converted to the torque demand to change-speed box (8) mouth, after having considered that transmission gear ratio is on the impact of the speed of a motor vehicle, obtain driving engine (1), the corresponding relation of ISG motor (5) rotating speed under different gears, the different speed of a motor vehicle, by the torque peak that can provide when driving engine and ISG motor are worked is provided simultaneously, driving torque demand curve when making these envelope of curves lines and just can obtaining vehicle and entirely accelerate, the corresponding driving torque demand curve of determining section accelerator travel immediately; According to the change-speed box mouth demand torque obtaining, incorporating transmission speed ratio just can obtain change-speed box input end demand torque in driving process.
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| CN105128700A (en) * | 2015-09-10 | 2015-12-09 | 福建工程学院 | Double-power system of electric vehicle and control method |
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| CN114475565A (en) * | 2022-03-30 | 2022-05-13 | 东风汽车集团股份有限公司 | Hybrid vehicle, starting control method, distribution system and vehicle-mounted controller |
| CN115571111A (en) * | 2022-11-23 | 2023-01-06 | 中国第一汽车股份有限公司 | Mode switching control method for ISG hybrid vehicle power system, vehicle and storage medium |
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