CN104670220A - SOC-based (state of charge-based) hybrid power control method under mountain ramp conditions - Google Patents
SOC-based (state of charge-based) hybrid power control method under mountain ramp conditions Download PDFInfo
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- CN104670220A CN104670220A CN201410839243.4A CN201410839243A CN104670220A CN 104670220 A CN104670220 A CN 104670220A CN 201410839243 A CN201410839243 A CN 201410839243A CN 104670220 A CN104670220 A CN 104670220A
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- 238000011084 recovery Methods 0.000 claims description 6
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- 238000001816 cooling Methods 0.000 claims description 3
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- 230000009466 transformation Effects 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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Classifications
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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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18072—Coasting
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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
-
- 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
-
- 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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18109—Braking
- B60W30/18127—Regenerative braking
-
- 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
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/24—Energy storage means
- B60W2510/242—Energy storage means for electrical energy
- B60W2510/244—Charge state
-
- 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
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/10—Longitudinal speed
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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
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The invention discloses an SOC-based (state of charge-based) hybrid power control method under mountain ramp conditions. After an automobile starts up, the fact that an SOC (stage of charge) value is higher than a set lower limit is detected, and a motor is driven to run continuously; when the SOC value decreases to the lower limit, an engine starts driving; when the automobile is on a long slope, the motor is in a negative torque state, and a generator is driven to charge a battery; when the SOC value rises to an upper limit, charging is removed, and the automobile is retarded. The SOC-based control method is applied to mountain roads; through level road control and ramp control, the engine is allowed to continuously run in an efficient economic area, exhaust emission is reduced, combustion efficiency is improved, running is more stable, and riding comfort is better; the problems that in the prior art, the too high SOC of the battery causes influence on driving safety and fuel economy, emission is poor and comfort is poor are solved; the method is simple and reliable, and automobile running cost is lowered.
Description
Technical field
The present invention relates to a kind of power consumption less, economy is high, starting pulsation-free based on the hybrid power control method under the road conditions of ramp, mountain area, belong to technical field of automobile control.
Background technology
Parallel connection type hybrid power system is primarily of driving engine (containing ECU), power-transfer clutch, change-speed box, three legacy devices and motor, electric machine controller, entire car controller (HCU) closed-centre system four electric component compositions.The control policy main thought of entire car controller makes driving engine operate in high-efficiency and economic region all the time, if engine operation point exceeds or less than this region, then use electric power generation or acting to be made up.Its basic functional principle is: entire car controller (HCU) is by gathering drive pedal, engine speed, motor speed, gear, clutch state, judgement driving intention, and calculate Target Towing or lock torque, minimum for principle with driving engine gas consumption, simultaneously with reference to motor total external characteristics, engine test bench characteristic, closed-centre system every boundary condition, Torque distribution is carried out to motor and driving engine, finally realize motor, engine moment coupling, drive car load to run according to the intention of chaufeur.
Public transport operating mode under the road conditions of ramp, mountain area has following features: (1) bus station pitch difference is apart from too large; Minimum station spacing can reach 190 meters, maximum station spacing more than 2000 meters; (2) level road section is less, and road grade is more compared with great Qie Po road; (3) block up serious in morning peak phase and evenign peak phase.
Propose a set of control method based on the speed of a motor vehicle factor for the public transport operating mode prior art under the road conditions of ramp, above mountain area, the basic ideas of this cover control method are:
(1) when the speed of a motor vehicle lower than during a certain limit value and electrokinetic cell SOC higher than setting lower limit time, adopt pure motor driving;
(2) when the speed of a motor vehicle travels higher than adopting engine working mode during a certain limit value;
(3) when car load climbing and electrokinetic cell SOC higher than setting lower limit constantly, driving engine and motor work simultaneously, provide car load run needed for moment of torsion;
(4) when car load braking or accelerator releasing, entire car controller is defaulted as braking mode, by motor, mechanical energy is converted to electrical power storage in electrokinetic cell; When electrokinetic cell SOC is higher than the higher limit set, braking energy feedback state stops.
There are some technical deficiencies in above control method, weak point is as follows: when traffic congestion, speed of operation is lower than setting limit value, can only travel by electric-only mode, result in electrokinetic cell SOC declines very fast, and after SOC is lower than the limit value set, driving engine switches to driving cycle pattern by idling mode, this mode due to speed of a motor vehicle engine starting lower than limit value result in when car load runs not steady, and travelling comfort is poor.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of based on the hybrid power control method under ramp, the mountain area road conditions of SOC, realize driving engine and operate in high-efficiency and economic region all the time, reduce exhaust emissions, improve combustion efficiency, car load runs more steady, traveling comfort is better, to overcome the deficiency of prior art problem.
The technical scheme that the present invention takes is: a kind of based on the hybrid power control method under ramp, the mountain area road conditions of SOC, and comprise level road and control and ramp control, level road controls, automobile starting, detects SOC value and is not less than 50%, drive motor continuous firing, the speed of a motor vehicle reaches 40km/s, and driving engine incision drives; SOC value is between 30% ~ 45%, the pure electric drive starting of vehicle is until exit when the speed of a motor vehicle reaches 20 ~ 30km/h, and engine starting is got involved and driven, when SOC is at 30% transformation point, the pure electric drive starting of vehicle is until exit when the speed of a motor vehicle reaches 15km/h, and driving engine starts rapidly gets involved driving;
Ramp controls: upward slope method, and when SOC is not less than 50%, when throttle depresses 40% ~ 60%, uphill starting is pure electric drive; Descending method, accelerator releasing rear vehicle enters recovery inertia energy, and ramp setting duration is no more than 15 seconds, does not carry out drive motor intervention, without recuperated energy.
Described level road exits the traverse time that need arrange for 3 seconds with driving engine access point in controlling at motor, to keep power operated ride comfort, on-line operation is at efficient region, and burning is more abundant, discharge reduces.
During described level road controls, driving engine incision drives, and when entering recuperated energy pattern, accelerator releasing, does not step on brake pedal (1), will carry out the inertia energy that 30 ~ 60A reclaims vehicle body; When gently stepping on brake pedal (2) rotation 5 ~ 15 degree, braking energy will be reclaimed with 80 ~ 100A; Heavily step on brake pedal 3 when rotating 15 ~ 25 degree, braking energy will be reclaimed with 100 ~ 200A, thus complete the recovery of energy, and realize the effect of energy-saving and emission-reduction.
During described level road controls, SOC value not higher than 45% time, recuperated energy pattern during recuperated energy pattern controls according to level road, further realizes the effect of energy-saving and emission-reduction.
Go up a slope in controlling method in described ramp, step on the accelerator is more than 3/5ths, and driving engine will start rapidly and get involved and jointly drives vehicle, effectively can improve acceleration capability.
During described ramp controls in descending method ramp more than 15 seconds, road is long slope, program sends and increases feedback energy instruction, and linearly increase progressively within the scope of 30 ~ 220A, energy recovery efficiency under the road conditions of sufficient raising ramp, has well slow effect, reduces the wearing and tearing of brake strap and wheel hub, thus improve car load solar term efficiency and economy, also improve the safety of driving.
The electrical generator output circuit that above-mentioned drive motor drives connects a dissipative load device, in parallel with electrokinetic cell, when battery SOC reaches charging upper limit value, the automatic turn off charge switch of automobile, and the load switch that closed dissipative load device connects, realize after battery is full of, realize the continuing of lower long slope, auxiliary braking process by dissipative load device, and thermal energy collecting can be got up be transported in automobile, when heating installation use in winter.
Described dissipative load device can arrange a load resistor and consume energy, and electric resistance structure is simple, convenient design, and can play good radiating effect.
Described dissipative load device is outside equipped with cooling mechanism, and accelerate the heat spreader of dissipative load device, realize the durable of equipment, not easily aging in low temperature, the life-span is longer.
Beneficial effect of the present invention: compared with prior art, the present invention adopts the control method based on SOC under the road conditions of ramp, mountain area, controlled by level road and ramp control, driving engine can be realized and operate in high-efficiency and economic region all the time, reduce exhaust emissions, improve combustion efficiency, run more steady, travelling comfort is better, efficiently solve prior art and affect traffic safety, fuel consumption and emission is bad, traveling comfort is poor problem when battery SOC is too high, control method is simple and reliable, reduces car load operating cost simultaneously.
Accompanying drawing explanation
Fig. 1 is control flow chart of the present invention;
Fig. 2 is brake-pedal travel schematic diagram.
Detailed description of the invention
As shown in Figure 1, a kind of based on the hybrid power control method under ramp, the mountain area road conditions of SOC, automobile starting, engine idle, if detect the lower limit of SOC value higher than setting, motor continuous firing, the continuous firing of motor, SOC can decline, reach when being no more than lower limit, driving engine will cut driving, enter and start owner's drive pattern, the driving engine incision speed of a motor vehicle is not a steady state value, but be subject to the impact of SOC height, when automobile is in lower long slope state, automobile just need move ahead slowly, motor is in negative torque conditions, drive electrical generators charges to battery, be used for supplementing of the battery SOC after SOC decline on the one hand, prepare next motor-driven vehicle, be used for the auxiliary braking of vehicle on the other hand.During vehicle start, if SOC is higher, then need many some electric energy of use, therefore the driving engine incision speed of a motor vehicle can arrange higher, thus extends the motor-driven time; If SOC is lower, then needs to reclaim a little electric energy more, electric current during braking energy feedback is suitably strengthened, to increase recovery usefulness; Now, the driving engine incision speed of a motor vehicle can arrange lower, thus shortens motor driving time, uses a little electric energy less.When battery SOC reaches charging upper limit value, lasting, the auxiliary braking process under long slope can be realized, and thermal energy collecting can be got up be transported in automobile, when heating installation use in winter.
Embodiment 1: the SOC electric flux under the road conditions of a kind of ramp controls, works out following control method by SOC value estimation, condition setting: the chargeable range of setting electrokinetic cell is 25% ~ 90%.
Level road strategy: as shown in Figure 2, when SOC >=50%, the sustainable pure electro-motive vehicle of drive motor is until exit when the speed of a motor vehicle reaches 40km/h, now driving engine starts rapidly and drives vehicle, the traverse time that 3 seconds need be set with driving engine access point is exited at motor, to keep power operated ride comfort, on-line operation is at efficient region, and sufficient combustion, discharge reduce; If now accelerator releasing 1, does not step on brake pedal, the inertia energy that 30 ~ 60A reclaims vehicle body will be carried out; If when gently stepping on brake pedal 2, braking energy will be reclaimed with 80 ~ 100A, when heavily stepping on brake pedal 3, braking energy will be reclaimed with 100 ~ 200A, as shown in Figure 2.
When SOC is between 30% ~ 45%, the pure electric drive starting of vehicle is until exit when the speed of a motor vehicle reaches 20 ~ 30km/h, and engine starting is got involved and driven vehicle, and energy regenerating is pressed level road and controlled to perform.
When SOC is at 30% transformation point, the pure electric drive starting of vehicle is until exit when the speed of a motor vehicle reaches 15km/h, and driving engine starts rapidly gets involved driving vehicle, and energy regenerating is pressed level road and controlled to perform.
Ramp controls: go up a slope strategy, and when SOC is greater than 50%, throttle depresses moderate, and uphill starting is pure electric drive, if dark step on the accelerator, driving engine will start rapidly and get involved and jointly drives vehicle, effectively can improve acceleration capability; Descending strategy: accelerator releasing rear vehicle reclaims inertia energy, this process setting duration is 15 seconds, if more than 15 seconds, show that road is long slope, then program sends and increases feedback energy instruction, and linearly increase progressively within the scope of 30 ~ 220A, energy recovery efficiency under the road conditions of sufficient raising ramp, has well slow effect, reduces the wearing and tearing of brake strap and wheel hub, thus improve car load solar term efficiency and economy, also improve the safety of driving.
All implant this control program under three kinds of situations of ramp way control method SOC in the above-mentioned methods, and establish
Put authority preferential, once satisfy condition at once start ramp way control method.
Practice shows, by the implantation of ramp control policy, can reach the energy-saving efficiency of 3%, emissions reduction.
The electrical generator output circuit that above-mentioned drive motor drives connects a dissipative load device, in parallel with electrokinetic cell, when battery SOC reaches charging upper limit value 90%, the automatic turn off charge switch of automobile, and the load switch that closed dissipative load device connects, realize after battery is full of, realize the continuing of lower long slope, auxiliary braking process by dissipative load device, and thermal energy collecting can be got up be transported in automobile, when heating installation use in winter.
Described dissipative load device can arrange a load resistor and consume energy, and electric resistance structure is simple, convenient design, and can play good radiating effect.
Described dissipative load device is outside equipped with cooling mechanism, and accelerate the heat spreader of dissipative load device, realize the durable of equipment, not easily aging in low temperature, the life-span is longer.
Claims (9)
1., based on the hybrid power control method under ramp, the mountain area road conditions of SOC, comprise level road and control and ramp control, it is characterized in that: level road controls, automobile starting, detects SOC value and is not less than 50%, drive motor continuous firing, the speed of a motor vehicle reaches 40km/s, and driving engine incision drives; SOC value is between 30% ~ 45%, the pure electric drive starting of vehicle is until exit when the speed of a motor vehicle reaches 20 ~ 30km/h, and engine starting is got involved and driven, when SOC is at 30% transformation point, the pure electric drive starting of vehicle is until exit when the speed of a motor vehicle reaches 15km/h, and driving engine starts rapidly gets involved driving;
Ramp controls: upward slope method, and when SOC is not less than 50%, when throttle depresses 40% ~ 60%, uphill starting is pure electric drive; Descending method, accelerator releasing rear vehicle enters recovery inertia energy, and ramp setting duration is no more than 15 seconds, does not carry out drive motor intervention, without recuperated energy.
2. according to claim 1 a kind of based on the hybrid power control method under ramp, the mountain area road conditions of SOC, it is characterized in that: described level road exits the traverse time that need arrange for 3 seconds with driving engine access point in controlling at motor.
3. according to claim 1 a kind of based on the hybrid power control method under ramp, the mountain area road conditions of SOC, it is characterized in that: during described level road controls, driving engine incision drives, when entering recuperated energy pattern, accelerator releasing, do not step on brake pedal (1), the inertia energy that 30 ~ 60A reclaims vehicle body will be carried out; When gently stepping on brake pedal (2) rotation 5 ~ 15 degree, braking energy will be reclaimed with 80 ~ 100A; Heavily step on brake pedal 3 when rotating 15 ~ 25 degree, braking energy will be reclaimed with 100 ~ 200A.
4. according to claim 3 a kind of based on the hybrid power control method under ramp, the mountain area road conditions of SOC, it is characterized in that: during described level road controls, SOC value not higher than 45% time, recuperated energy pattern during recuperated energy pattern controls according to level road.
5. according to claim 1 a kind of based on the hybrid power control method under ramp, the mountain area road conditions of SOC, it is characterized in that: go up a slope in controlling method in described ramp, step on the accelerator is more than 3/5ths, and driving engine will start rapidly and get involved and jointly drives vehicle.
6. according to claim 1 a kind of based on the hybrid power control method under ramp, the mountain area road conditions of SOC, it is characterized in that: during described ramp controls in descending method ramp more than 15 seconds, road is long slope, program sends and increases feedback energy instruction, and linearly increases progressively within the scope of 30 ~ 220A.
7. according to claim 1 a kind of based on the hybrid power control method under ramp, the mountain area road conditions of SOC, it is characterized in that: the electrical generator output circuit that drive motor drives connects a dissipative load device, in parallel with electrokinetic cell, when battery SOC reaches charging upper limit value, the automatic turn off charge switch of automobile, and the load switch that closed dissipative load device connects.
8. according to claim 2 a kind of based on the hybrid power control method under ramp, the mountain area road conditions of SOC, it is characterized in that: described dissipative load device can arrange a load resistor and consume energy.
9. according to claim 3 a kind of based on the hybrid power control method under ramp, the mountain area road conditions of SOC, it is characterized in that: described dissipative load device is outside equipped with cooling mechanism.
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| CN201410839243.4A CN104670220B (en) | 2014-12-30 | 2014-12-30 | SOC-based (state of charge-based) hybrid power control method under mountain ramp conditions |
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| CN201410839243.4A CN104670220B (en) | 2014-12-30 | 2014-12-30 | SOC-based (state of charge-based) hybrid power control method under mountain ramp conditions |
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| CN109586389A (en) * | 2018-10-31 | 2019-04-05 | 北京北交新能科技有限公司 | A kind of vehicle-mounted mixed energy storage system energy control strategy |
| CN112455424A (en) * | 2020-12-10 | 2021-03-09 | 上海馨联动力系统有限公司 | Climbing condition identification method for hybrid electric vehicle |
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| CN105904971A (en) * | 2016-05-27 | 2016-08-31 | 苏州海格新能源汽车电控系统科技有限公司 | High-pressure load shedding device used for parallel hybrid electric vehicle |
| CN105904971B (en) * | 2016-05-27 | 2018-01-23 | 苏州海格新能源汽车电控系统科技有限公司 | A kind of high-pressure unloading device for parallel hybrid electric |
| CN109586389A (en) * | 2018-10-31 | 2019-04-05 | 北京北交新能科技有限公司 | A kind of vehicle-mounted mixed energy storage system energy control strategy |
| CN112455424A (en) * | 2020-12-10 | 2021-03-09 | 上海馨联动力系统有限公司 | Climbing condition identification method for hybrid electric vehicle |
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