An Equivalent Fuel Consumption Minimization Strategy for Fuel Cell Vehicles Based on Variable Equivalent Coefficient

Abstract:

In order to improve the fuel economy and environmental adaptability of fuel cell vehicles， the energy management and optimization algorithm of fuel cell vehicle is studied based on the equivalent fuel consumption minimization strategy. First， the output power or braking recovery power is obtained by solving the vehicle dynamics model， and the equivalent fuel consumption of the system is calculated and taken as the optimization objective to achieve the most economic power distribution. In order to improve the adaptability to different working conditions， considering the physical meaning of equivalent coefficient， a variable equivalent coefficient concerning the state of charge of battery is formulated for the first time， so that the fuel cell vehicle can better maintain the state of charge and make full use of the spare energy of the battery. The simulation results under WLTC （worldwide harmonized light vehicles test cycle） and CATC （China automobile test cycle） standard conditions show that the proposed equivalent consumption minimization strategy based on the variable equivalent factor can meet the function of reducing fuel consumption and maintaining battery state of charge， which realizes the energy management and optimization of fuel cell vehicle and verifies good adaptability to working conditions.

Key words:fuel cell vehicle;energy management strategy;fuel economy;equivalent fuel consumption minimization strategy;variable equivalent coefficient