Vehicle SOC adaptive energy management method based on ECMS

Abstract

The invention discloses a vehicle SOC adaptive energy management method based on ECMS, and the method comprises the steps: S100, obtaining an optimal oil-electricity conversion equivalent factor initial value s through employing an iterative targeting method based on the current parameters of a vehicle and a preset driving cycle; S200, correcting the initial value s of the optimal oil-electricityconversion equivalent factor according to the current SOC of the vehicle to obtain a corrected optimal oil-electricity conversion equivalent factor s (t); S300, on the basis of the corrected optimal oil-electricity conversion equivalent factor s (t), respectively calculating the minimum equivalent energy consumption of a pure electric driving mode, a series driving mode and a parallel driving modeunder the current driver demand torque; and S400, on the basis of the minimum equivalent energy consumption calculation result and the vehicle state parameters, selecting a target operation mode of the vehicle. By the adoption of the vehicle SOC self-adaptive energy management method based on the ECMS, the starting and stopping frequency of an engine can be obviously reduced, so that oil consumption is effectively reduced, fuel oil is saved, and the economical efficiency and NVH performance of a vehicle are improved.

Description

technical field [0001] The invention relates to a vehicle energy management method, in particular to a vehicle SOC adaptive energy management method. Background technique [0002] In recent years, as domestic and foreign requirements for energy-saving and environmental protection of vehicles have become higher and higher, and users have paid more attention to energy-saving and environmental protection of vehicles, new energy vehicles have gradually become the development trend of future vehicles. Among them, hybrid vehicles among new energy vehicles have become the travel choice of more and more people, and are favored by the market and users. [0003] At present, there are already many hybrid electric vehicles on the market. In the hybrid electric vehicles, the combination of the engine and the electric motor is used to drive the vehicle, which will have the function of starting and stopping the engine. [0004] In the prior art, in order to ensure the power balance, the e...

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Problems solved by technology

[0004] In the prior art, in order to ensure the power balance, the engine of the hybrid vehicle starts and stops frequently, and the NVH (Noise, Vibration, Harshness, noise, vibration and harshness) performance is not good

Therefore, the hybrid energy management strategy used on hybrid vehicles in the prior art has high requirements on the performance of the vehicle engine. In order to achieve the purpose of power following, the engine needs to be larger than the traditional Alto cycle engine. Economic range, very unfavorable for production

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