Hybrid electric vehicle mode switching coordination control method based on model prediction control algorithm

Abstract

The invention discloses a hybrid electric vehicle mode switching coordination control method based on a model prediction control algorithm and relates to the field of vehicle control theories. A fast and systematic model prediction control strategy is applied to the method. On the basis of building hybrid electric vehicle mode switching process linear and nonlinear models, system operation status signals in the vehicle mode switching process are collected, control commands of all components of a system in a control period are determined through model prediction control, real-time output torque conflict of an engine, a motor and a clutch in the mode switching process is coordinately controlled, smooth and steady switching between modes is guaranteed, and the power performance of a vehicle and the riding comfort level of passengers in the mode switching process are improved. According to the control system, a good control effect can be achieved because the future requirement information of the vehicle and the performance of an optimized objective function in a prediction time domain are comprehensively considered.

Description

technical field [0001] The invention relates to the field of vehicle control, in particular to a hybrid electric vehicle mode switching coordinated control method based on a model predictive control algorithm. Background technique [0002] The energy crisis and environmental pollution have put forward some new requirements for the development of the traditional automobile industry. Due to low energy consumption, low pollution, and relatively mature technology, hybrid electric vehicles have become the most practical solution to these two problems. Hybrid vehicles have two or more driving sources. Under different combinations of driving sources, the vehicle can work in various operating modes. Due to the difference in the torque response characteristics of the engine and the electric motor, when the engine and electric motor are involved During the start-stop mode switching, the synthetic torque of the power source may have a large deviation from the target torque, which will ...

AI Technical Summary

Problems solved by technology

Hybrid vehicles have two or more driving sources. Under different combinations of driving sources, the vehicle can work in various operating modes. Due to the difference in the torque response characteristics of the engine and the electric motor, when the engine and electric motor are involved During the start-stop mode switching, the synthetic torque of the power source may have a large deviation from the target torque, which will cause the vehicle's power interruption or large fluctuations in the output torque, resulting in poor vehicle dynamics and passenger comfort.

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