Real-time optimized control method for plug-in parallel hybrid electric vehicle
A hybrid electric vehicle and optimal control technology, applied in the control field, can solve the problems of battery electric energy not taking into account the travel mileage, unable to realize the optimal value of fuel economy of plug-in parallel hybrid electric vehicles, etc., and achieve optimal fuel economy. performance, and the effect of reducing computational load
Active Publication Date: 2013-05-22
南京紫荆华创科技有限公司
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[0004] However, the above distribution strategy of battery electric energy does not take into account the length of the travel mileage, therefore, the optimal value of the fuel economy of the plug-in parallel hybrid electric vehicle cannot be achieved according to the above method
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[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0019] The inventive method is suitable for plug-in parallel hybrid vehicles (such as figure 1 shown) for drive control in the CD stage. The present invention does not relate to the shift strategy, and adopts the following rules for the control strategy of the clutch: if the engine torque command is 0, the clutch is disconnected, and the engine and the drive train are disengaged; otherwise, the clutch is combined, and the engine transmits torque to the vehicle Drive Train. The present invention takes the power system of the vehicle as the controlled object, and takes TSR (Torque Split Ratio, torque distribution ratio) as the control variable of the system, which is defined as the ratio of the motor torque to the total torque demand. When the vehicle has a torque demand (that is, the total torque demand) at any time, different TSRs will be used to me...
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The invention relates to a real-time optimized control method for a plug-in parallel hybrid electric vehicle. The real-time optimized control method includes 1), a stage for calibrating initial values in synergetic states: calibrating a comparison table of trip mileages and the initial values in the synergetic states according to different parameters of the vehicle and different characteristic conditions; and 2), an online real-time optimizing stage implemented by a vehicle control unit: enabling the vehicle control unit to receive a trip mileage specified by a user before the vehicle is started, selecting an initial value, which is matched with the trip mileage, in the corresponding synergetic state according to the calibrated comparison table, starting the vehicle, enabling the vehicle control unit to combine a vehicle state with the synergetic state to determine a torque split ratio of a motor to an engine, and computing a state value at the next moment in the synergetic state. The real-time optimized control method has the advantages that the trip mileage of the user is considered from the prospective of global optimization, a Pontryagin extremum principle is adopted, and a power system is subjected to optimized control, so that fuel consumption is minimized when the vehicle runs according to a specified condition, and the real-time optimized control method can be widely applied to managing energy of plug-in parallel hybrid electric vehicles.
Description
technical field [0001] The invention relates to a control method, in particular to a real-time optimal control method for a plug-in parallel hybrid electric vehicle. Background technique [0002] With the increasingly urgent demand for energy saving and emission reduction, new energy vehicles are receiving more and more attention. Plug-in parallel hybrid electric vehicle has received extensive attention because it has the advantages of both electric vehicles and hybrid electric vehicles. Plug-in parallel hybrid electric vehicles can have the same advantages of zero emission, low energy consumption, and low cost of use as electric vehicles in its CD (Charge Depleting, power drop) stage; and in CS (Charge Sustaining, power maintenance) stage. Advantages of hybrid vehicles with long driving range. Therefore, the plug-in parallel hybrid electric vehicle has become the focus of the current industry. [0003] The fuel saving of plug-in parallel hybrid electric vehicles is achie...
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IPC IPC(8): B60W20/00B60W20/11B60W20/15
CPCY02T10/6221Y02T10/62
Inventor 侯聪徐梁飞欧阳明高王贺武
Owner 南京紫荆华创科技有限公司