Plug-in hybrid power bus dynamic logic threshold energy management method based on road condition model

Abstract

The invention provides a plug-in hybrid power bus dynamic logic threshold energy management method based on a road condition model. The method specifically includes the steps that first, the vehicle travelling road condition model is established according to historical traffic information of a bus and a neural network; second, the changing curve of the driving speed in the future and the road slope can be obtained according to departure time, a line and the road condition model; third, energy needed for travelling of the bus is calculated on the basis of the curve and vehicle parameters, and a vehicle energy management logic threshold parameter is dynamically adjusted according to the difference value between the energy needed for travelling of the bus and energy capable of being provided by a battery; fourth, a vehicle controller selects a work mode according to the travelling parameters of the bus and the logic threshold parameter. The logic threshold parameter can be dynamically adjusted on the basis of the road condition model, it can be guaranteed that an energy management strategy can adapt to different travelling road conditions, and fuel economy of the plug-in hybrid power bus is further improved.

Description

technical field [0001] The invention relates to an energy management method of a plug-in hybrid electric bus, in particular to a multi-power source optimization control of a plug-in hybrid electric bus based on a driving road condition model, and belongs to the technical field of hybrid electric bus control. Background technique [0002] The plug-in hybrid electric bus is a new type of energy-saving and environmentally friendly vehicle derived from the traditional hybrid electric bus. It has many advantages such as low cost of use, low emissions, and high utilization of the power grid. And the ability to function like a conventional full hybrid when needed has become one of the best options for transitioning to an eventual clean energy vehicle. [0003] Plug-in hybrid electric vehicles are the perfect combination of traditional fuel vehicles and pure electric vehicles, and the link of the combination is the energy management strategy. The proposed energy management strategi...

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Problems solved by technology

[0005] The purpose of the present invention is to propose an energy management method for a plug-in hybrid electric bus. Aiming at the shortcoming that the static logic threshold strategy cannot adapt to changes in driving road conditions, a driving road condition model is established according to vehicle driving history data collected by GPS, and adjusted accordingly. Logical threshold parameters to achieve optimal energy distribution of the hybrid system and further improve the fuel economy of the vehicle

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