Vehicles control method for deep hybrid power automobile

Abstract

The present invention relates to a finished vehicle control method of a deep hybrid-electric vehicle. The finished vehicle power demand Pcar=PV +PB +PA is filtered to get a corresponding low-frequency component Pcar-low (wherein PV is the required power for traveling; PB is the required power to keep a battery SOC changing within certain range; and PA is the required power of vehicle auxiliary equipment and partial power lost during the process of energy conversion), and the working point of an internal-combustion engine is determined according to the internal-combustion engine equipower curve corresponding to the Pcar-low. When the Pcar-low is within the range covered by the corresponding power of the internal-combustion engine working area, the internal-combustion engine starts, and the hybrid-electric vehicle works under a hybrid-electric mode; when the Pcar-low is less than the minimum point of the power which can be supplied by the internal-combustion engine within the range of the working area, the internal-combustion engine stops, and the deep hybrid-electric vehicle works under an all-electric mode. At the same time, when the internal-combustion engine is judged to start, hysteresis ratio value Pthotle is added to prevent the internal-combustion engine from starting and stopping frequently. Under the all-electric mode, the Pcar-low is output by a stepless transmission completely, and under the hybrid-electric mode, the sufficient and excessive power provided by the Pcar-low and the internal-combustion engine is compensated by the stepless transmission.

Description

technical field [0001] The invention relates to a vehicle control method of a deep hybrid electric vehicle, in particular to a deep hybrid electric vehicle used for continuously variable transmission. Background technique [0002] Mild hybrid vehicles and moderate hybrid vehicles mainly rely on the integrated motor to quickly start the internal combustion engine when the vehicle starts, stop the internal combustion engine to eliminate the idling state when the vehicle stops, and recover braking energy at the same time, so as to achieve the purpose of fuel saving. Mild hybrid electric vehicles basically do not change the operating point of the internal combustion engine, and the participation of the motor in the mild hybrid electric vehicle is greater than that of the mild hybrid electric vehicle, so limited changes can be made to the internal combustion engine operating point. With the development of technology, if the traditional internal combustion engine is improved, it c...

AI Technical Summary

Problems solved by technology

CN1415500 patent "Hybrid electric vehicle energy control system" proposes to control the start and stop of the internal combustion engine according to the remaining battery power, and this method only controls the battery

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