Input split type hybrid power flow control method

Abstract

The invention discloses an input split type hybrid power flow control method and relates to the technical field of vehicle hybrid power. The method comprises, based on the input split type rotating speed and rotating torque coupling relationship, enabling an engine to be in a rotating speed control mode, and a generator and an electromotor to be in a rotating torque control mode; starting from the target power of a battery pack and a driving required power and based on an optimal fuel economy working curve, determining the working points of the engine, the generator and the electromotor, and meanwhile, ensuring the balance between electric quantity and power of batteries. According to the input split type hybrid power flow control method, firstly, the driving required power and the target power of the battery pack are determined, so that under the premise of ensuring vehicle dynamic performance, the regulating manner of the generator and every electromotor can be determined according to the characteristics of a input split type hybrid power system and accordingly the working points of every power unit can be adjusted flexibly, and further the fuel economy can be enhanced; through power flow control, the power and the electric quantity of the batteries can be in a reasonable state, over-charging or over-discharging of the batteries can be avoided, the system performance can be improved and the service life of the batteries can be prolonged.

Description

technical field [0001] The invention relates to the technical field of vehicle hybrid power, in particular to a method for controlling power flow of split-speed and combined-moment hybrid power. Background technique [0002] Energy saving, environmental protection and safety are the three major themes of today's automobile development; over the past ten years, people have been actively exploring the research and development of new energy-saving and environmentally friendly vehicles, pure electric vehicles (EV), hybrid electric vehicles (HEV) and fuel cell vehicles (FCEV) has become a research hotspot; due to the limitation of battery technology, pure electric vehicles have a short driving range, and it is difficult to meet people's requirements in terms of price and performance in a short period of time; although fuel cell electric vehicles have a good prospect, there are still technical problems. and cost issues; therefore, gasoline-electric hybrid vehicles developed on the...

AI Technical Summary

Problems solved by technology

[0002] Energy saving, environmental protection and safety are the three major themes of today's automobile development; over the past ten years, people have been actively exploring the research and development of new energy-saving and environmentally friendly vehicles, pure electric vehicles (EV), hybrid electric vehicles (HEV) and fuel cell vehicles (FCEV) has become a research hotspot; due to the limitation of battery technology, pure electric vehicles have a short driving range, and it is difficult to meet people's requirements in terms of price and performance in a short period of time; although fuel cell electric vehicles have a good prospect, there are still technical problems. and cost issues; therefore, gasoline-electric hybrid vehicles developed on the basis of mature technologies have been increasingly widely researched and applied;

Images