Parallel plug-in hybrid electric vehicle (PHEV) energy management method based on intelligent transportation system

Abstract

The invention discloses a parallel plug-in hybrid electric vehicle (PHEV) energy management method based on an intelligent transportation system. The parallel PHEV energy management method based on the intelligent transportation system mainly comprises the steps that a reference SOC generating algorithm and a PHEV parameter self-adaptive vehicle control algorithm are used as the bases for predicting the working condition; the working condition information such as the front path traveling mileage, the road gradient, traffic light signals and vehicle speed distribution is obtained through an ITS system according to the reference SOC generating algorithm, and the predicted working condition of a front path is generated through a working condition predicting algorithm; the required traveling power, the vehicle speed distribution characteristic and the traveling mileage of the front path are calculated according to the predicted working condition, and the reference SOC (SOC ref) is generated through the reference SOC generating algorithm; and real-time online adjustment of the a PHEV control threshold parameter is achieved through the PHEV parameter self-adaptive vehicle control algorithm according to the SOC ref, and the engine torque and the motor torque are distributed reasonably. By the adoption of the parallel PHEV energy management method based on the intelligent transportation system, online adjustment of the control parameter of a PHEV energy management strategy can be achieved according to the front traveling working condition, the electricity quantity of batteries is distributed and used reasonably, and the operating efficiency of an engine and the economical efficiency of a PHEV are improved.

Description

technical field [0001] The invention relates to a vehicle control method for a plug-in parallel hybrid electric vehicle, in particular to a vehicle control method for a plug-in parallel hybrid electric vehicle based on an intelligent transportation system (Intelligent Transportation System, ITS), which belongs to new energy vehicles field of control technology. Background technique [0002] A plug-in hybrid electric vehicle (Plug-in Hybrid Electric Vehicle, PHEV) has a battery with a larger capacity than a hybrid electric vehicle (Hybrid Electric Vehicle, HEV), and can obtain electric energy from the grid. PHEV has the advantages of both HEV and pure electric vehicles (Blade Electric Vehicles, BEV). When the battery power is sufficient, PHEV is in the charge depleting mode (Charge Depleting, CD), and the vehicle is mainly driven by a motor, which has the advantages of low fuel consumption and low emission ; When the battery power is low, PHEV is in charge sustaining mode (C...

AI Technical Summary

Problems solved by technology

When the control threshold value based on the threshold value energy management strategy is fixed, it cannot automatically adapt to the influence of changes in working conditions

It may cause the battery power to be "depleted" early (SOC is at the minimum allowable value), or the battery power is not fully used at the end of the trip

Studies have shown that both situations will increase the fuel consumption of parallel PHEVs and worsen the economy

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