Torque distribution control method for power-split hybrid system

Abstract

The present invention provides a torque distribution control method of a power-split hybrid power system, which determines the rotational speed and torque of the first planetary carrier according to the current working conditions of the vehicle, limits them and calculates the maximum rotational speed and torque of the first planetary carrier value and minimum value, using the maximum and minimum values ​​of the speed and torque of the first planetary carrier as boundary conditions, the speed and torque of the first planetary carrier when the system efficiency is optimal are calculated by intelligent particle swarm algorithm, and the system efficiency is optimal The rotation speed and torque of the first planetary carrier at the same time are divided into power, and the expected output speed and output torque of the small motor, large motor and engine are calculated according to the dynamic equation of the planetary gear mechanism, and the expected output speed and torque of the small motor, large motor and engine are calculated. The output speed and expected output torque are sent to the corresponding small motor controller, large motor controller and engine controller for control execution. The method of the invention is simple and feasible, and can improve system efficiency.

Description

technical field [0001] The invention relates to the field of automobile control, in particular to a torque distribution control method of a power-split hybrid power system. Background technique [0002] The hybrid system used in hybrid vehicles generally involves torque distribution during operation. Whether the torque distribution is appropriate will ultimately affect the system efficiency of the hybrid system and the fuel consumption of the vehicle. In the existing technology, the more common torque distribution method is to use the distribution method of exhaustive sweep points to obtain the system efficiency, and then calibrate the torque distribution method of the vehicle under different working conditions according to the experimental results. This method requires a large amount of experiments and consumes The time length is affected by the accuracy of experimental equipment and measuring instruments, resulting in poor accuracy, and it is difficult to accurately obtain...

AI Technical Summary

Problems solved by technology

In the existing technology, the more common torque distribution method is to use the distribution method of exhaustive sweep points to obtain the system efficiency, and then calibrate the torque distribution method of the vehicle under different working conditions according to the experimental results. This method requires a large amount of experiments and consumes Due to the influence of the experimental equipment and the accuracy of the measuring instruments, the accuracy is poor, and it is difficult to accurately obtain the optimal system efficiency

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