Whole vehicle energy distribution method for hybrid control unit (HCU) of single-axle parallel plug-in hybrid electric vehicle

Abstract

The invention discloses a whole vehicle energy distribution method for a hybrid control unit (HCU) of a single-axle parallel plug-in hybrid electric vehicle. The method comprises the first step of making an energy distribution principle according to information of state of charge (Soc); the second step of judging the brake state of the whole vehicle according to an accelerator pedal signal, a brake pedal signal, a vehicle speed signal, the Soc information and a gradient signal under motion limitation of braking judgment; the third step of controlling the driving mode of the whole vehicle according to results in the second step; and the fourth step of calculating the braking torque and distributing the driving torque according to the judgment results in the second step, the judgment results in the third step, the Soc information and the vehicle speed signal. According to the whole vehicle energy distribution method, the information processing mode is efficient, the judging method determining the priority of information is made, and repeated judgment of information is avoided. The participated driving range of electric energy is wide, the vehicle states are divided according to real-time information of the Soc, and different driving policies are made according to different states. The energy recovery policy in multiple states is made, and repeated utilization of electric energy is improved.

Description

technical field [0001] The invention relates to the field of control methods of hybrid electric vehicles, in particular to a vehicle energy distribution method for a single-axis parallel plug-in hybrid electric vehicle HCU. Background technique [0002] From the large-scale demonstration and promotion of new energy vehicles promoted by the state in 2009, through the seven strategic emerging industries of new energy vehicles in 2010, to the decision to promote 5,000 hybrid buses in non-state demonstration cities in 2012, all these have highlighted the new energy Automobiles are the direction of the future development of the automotive industry, and hybrid buses are an inevitable transitional period, while plug-in hybrid vehicles have pushed the automotive industry a big step forward. The plug-in hybrid electric vehicle is an external plug-in function added to the ordinary hybrid electric vehicle, so that the power of the vehicle can be replenished once or twice a day. How to ...

AI Technical Summary

Problems solved by technology

[0003] In the existing hybrid power control system, the key point of control is to control the working state of the engine and motor under the premise of maintaining a stable state of the battery, and it is impossible to better distribute the electric energy to each driving state. This method may In the plug-in mode, the expected energy-saving effect cannot be achieved, and the advantages of plug-in hybrid electric vehicles cannot be reflected. Therefore, it is necessary to formulate an energy distribution method for the whole vehicle that uses electric energy efficiently.

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