Hybrid electric vehicle energy management control method

Abstract

The invention relates to an energy management control method for a hybrid electric vehicle. The method can ensure that energy consumption is lower under the condition that the vehicle is lack of electricity. The method comprises the steps of determining total torque required by a driver based on accelerator pedal opening; selecting an alternative torque discrete interval of the engine from a preset optimal efficiency torque interval of the engine based on the rotating speed of the engine; obtaining a motor alternative torque discrete interval based on the driver demand total torque and the engine alternative torque discrete interval; determining a power assembly alternative equivalent power loss discrete interval based on the engine alternative torque discrete interval, the motor alternative torque discrete interval, the engine rotating speed and the motor rotating speed; based on the vehicle speed and the delta(SOC), determining a corresponding equivalent factor from a pre-stored corresponding relation calibration table; determining a target engine torque and a target motor torque which enable the total energy consumption of the vehicle to be minimum based on the power assembly alternative equivalent power loss discrete interval and the equivalent factor, and outputting the target engine torque and the target motor torque to an engine control unit and a motor control unit for control.

Description

technical field [0001] The invention belongs to the vehicle power field of a hybrid electric vehicle, and in particular relates to an energy management control method of a hybrid electric vehicle. Background technique [0002] Energy management strategy: Under different circumstances, a series of rules or a collection of sub-strategies that minimize the total energy consumption of the vehicle power system by determining the power distribution among the prime movers and energy storage devices in the power system. [0003] SOC (state of charge, representing the percentage of the remaining battery capacity and the total capacity) balance at the end is a necessary condition for the lowest fuel consumption of the vehicle, so it is necessary to constrain the change of SOC. For PHEV, the power balance strategy is necessary for the lowest fuel consumption condition. [0004] ECMS (Equivalent Consumption Minimization Strategy) is equivalent to the minimum fuel consumption strategy. ...

AI Technical Summary

Problems solved by technology

[0008] The existing technology calculates the equivalent factor by setting S0, k, and T. The problem is that the equivalent factor is poorly calibrated and robust. The equivalent factor is calculated according to the curve obtained by the three parameters, and then through the real-time equivalent factor Distributing the output power of the engine and electric motor

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