An ecms-based vehicle SoC adaptive energy management method

Abstract

The invention discloses an ECMS-based vehicle SOC self-adaptive energy management method, which includes the steps: S100: Based on the current parameters of the vehicle and the preset driving cycle, an iterative shooting method is used to obtain the initial value of the optimal fuel-electric conversion equivalent factor s; S200: Correct the initial value s of the optimal gasoline-electric conversion equivalent factor according to the current SOC of the vehicle, and obtain the corrected optimal gasoline-electric conversion equivalent factor s(t); S300: Based on the corrected optimal gasoline-electric conversion Convert the equivalent factor s(t) to calculate the minimum equivalent energy consumption in pure electric drive mode, series drive mode and parallel drive mode under the current driver demand torque; S400: based on the minimum equivalent energy consumption calculation results and vehicle state parameters, Select the desired operating mode for the vehicle. The ECMS-based vehicle SOC self-adaptive energy management method of the present invention can significantly reduce the engine start-stop frequency, thereby effectively reducing fuel consumption, saving fuel, and improving the economy and NVH performance of the vehicle.

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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