Plug-in type planet series-parallel automobile energy management control method

Abstract

The invention discloses a plug-in type planet series-parallel automobile energy management control method and belongs to the technical field of hybrid automobile control. The plug-in type planet series-parallel automobile energy management control method is used for determining a working point of each power source of a vehicle control electric mode and a hybrid drive mode. In the hybrid drive mode, the change of a driver desired torque is responded by controlling a motor desired torque in different battery capacity modes; a working point of an engine is always controlled on an optical workingcurve; when an actual torque of a motor is larger, an engine desired torque is controlled to be increased, so that the motor obtains a torque interval supplementing the driver desired torque; in addition, the control of the working point of the engine also needs to guarantee a control output power of the battery. The plug-in type planet series-parallel automobile energy management control method disclosed by the invention has the advantages that the stable operation of the engine is sufficiently considered, the fuel consumption is reduced, the battery output power control is reduced, and the fuel economy in the full running process is improved; and as the method is a control strategy of a logic threshold value, the operation speed of the method in a controller is high, and the method is easy to implement and popularize.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicles, in particular to an energy management and control method for a plug-in planetary hybrid vehicle. Background technique [0002] New energy vehicles are the mainstream of current development, and plug-in hybrid vehicles are the most practical choice under the current battery technology, which can not only make up for the short driving range of pure electric vehicles, but also greatly reduce fuel consumption compared with traditional vehicles. consumption and exhaust emissions. Plug-in hybrid electric vehicles have multiple power sources such as internal combustion engines and electric motors, and the structure is complex. How to effectively manage the energy of multiple power sources at the same time is the key to exerting the energy-saving and environmental protection advantages of hybrid electric vehicles. [0003] For plug-in hybrid electric vehicles, when the capacity of the p...

AI Technical Summary

Problems solved by technology

[0004] In the patent "plug-in hybrid electric vehicle and its energy management method" (application publication number is CN107640038A), a method of controlling the battery power by controlling the start of the range extender under the premise of known mileage is disclosed. Decrease rate, thereby reducing fuel consumption and driving economic cost, although the real-time performance is good, but because it is an extended-range configuration, it does not involve different SOC modes, control the motor to respond to changes in the driver's demand torque, and maintain the engine operating point as much as possible Stable, to achieve the purpose of reducing fuel consumption

[0005] In the patent "A Method and System for Energy Management of Plug-in Hybrid Electric Vehicles" (application publication number CN108909702A), a method for predicting short-term future vehicle speed based on vehicle historical information and allocating and managing the power output of vehicle energy sources is disclosed , although it can improve fuel economy and make the engine work in the high-efficiency zone as much as possible, but it is difficult to promote the actual vehicle application due to the long time-consuming optimization calculation

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